299 results on '"Zhou, Tang"'
Search Results
252. Phase conjugation of BaTiO3:Ce by backward stimulated photorefractive scattering
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Zhu, Yong, primary, Yang, Changxi, additional, Hui, Mengjun, additional, Niu, Xiaojuan, additional, Zhang, Jinfeng, additional, Zhou, Tang, additional, and Wu, Xing, additional
- Published
- 1994
- Full Text
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253. On Development of Wushu under the Capitalization and Globalization.
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HUANG Cong, REN Lu, Jin-zhou, TANG, YUAN Bing, Xu-dong, LI, and MA Long
- Abstract
This paper, adopting the methods of literature, review and logical reasoning, analyses the current development of Wushu from the view of globalization and draws the following conclusion: Wushu development is meeting the challenge of globalization which is also deemed as an opportunity. Wise solutions and responses are the key to determining the continuous Wushu's development. The research suggests that : Wushu culture possesses a potential capital value. Mter being capitalized and implemented by market, it would bring up certain economical profit so as to realize its cultural and social value. The Capitalization of W ushu culture meets the need of W ushu innovation, cater for future generations, and are welcomed by sustainable development, intemationalization and maintenance of the national culture security. When Wushu culture has its advantages and disadvantages during the period of capitalization, importance should be attached to the both sides. Mter capitalized, Wushu would become a brand of Chinese culture. Industrialization of Wushu culture could realize its capital value and promote its development under the condition of globalization. [ABSTRACT FROM AUTHOR]
- Published
- 2012
254. Mutual-coherent-pumped phase conjugation with cerium-doped barium titanate.
- Author
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Yang, Changxi, Zhu, Yong, Niu, Xiaojuan, Zhang, Daofan, Zhou, Tang, Wang, Xiaoming, Liu, Hongbin, and Wu, Xing
- Published
- 1998
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255. Color center and domain structure in single crystals of LaAlO3
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Chang, Ying-Chuan, primary, Hou, De-Sen, additional, Yu, Yu-De, additional, Xie, Si-Shen, additional, and Zhou, Tang, additional
- Published
- 1993
- Full Text
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256. Blocking caspase-3-dependent pathway preserves hair cells from salicylate-induced apoptosis in the guinea pig cochlea.
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Hao Feng, Shi-Hua Yin, and An-Zhou Tang
- Abstract
In the present study, we aim to explore whether the caspase-3-dependent pathway is involved in the apoptotic cell death that occurs in the hair cells (HCs) of guinea pig cochlea following a salicylate treatment. Guinea pigs received sodium salicylate (Na-SA), at a dose of 200 mg·kg·d i.p., as a vehicle for 5 consecutive days. In some experiments, N-benzyloxycarbonyl-Asp-Glu-Val-Asp-fluoromethylketone (zDEVD-FMK), a specific apoptosis inhibitor, was directly applied into the cochlea via the round window niche (RWN) prior to salicylate treatment for determination of caspase-3 activation. Alterations in auditory function were evaluated with auditory brainstem responses (ABR) thresholds. Caspase-3 activity was determined by measuring the proteolytic cleavage product of caspase-3 ( N-terminated peptide substrate). DNA fragmentation within the nuclei was examined with a terminal deoxynucleotidyl transferase-mediated dUTP-biotin nick end-labeling (TUNEL) method. Ultrastructure variation in the target cell was assessed by electron microscopy (EM). Salicylate treatment initiated an obvious elevation in ABR thresholds with a maximum average shift of 60 dB sound pressure level (SPL), and caused significant apoptosis in both inner (IHCs) and outer (OHCs) hair cells resulted from an evident increasing in immunoreactivity to caspase-3 protease. Transmission electron microscopy (TEM) displayed chromatin condensation and nucleus margination accompanied by cell body shrinkage in the OHCs, but not in the IHCs. Scanning electron microscopy (SEM) showed breakdown, fusion, and loss in the stereociliary bundles at the apex of OHCs rather than IHCs. zDEVD-FMK pretreatment prior to salicylate injection substantially attenuated an expression of the apoptotic protease and protected HCs against apoptotic death, followed by a moderate relief in the thresholds of ABR, an alleviation in the submicroscopic structure was also identified. In particular, disorientation and insertion in the hair bundles at the apex of OHCs was exhibited though no classic apoptotic change found. The above changes were either prevented or significantly attenuated by zDEVD-FMK. These findings indicate that salicylate could damage cochlear hair cells via inducing apoptosis associated with caspase-3 activation. [ABSTRACT FROM AUTHOR]
- Published
- 2011
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257. Nitrative and oxidative DNA damage as potential survival biomarkers for nasopharyngeal carcinoma.
- Author
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Yuan-Jiao Huang, Bei-Bei Zhang, Ning Ma, Murata, Mariko, An-zhou Tang, and Guang-Wu Huang
- Abstract
Currently, there are no satisfactory biomarkers available to screen for nasopharyngeal carcinoma (NPC). Nitric oxide (NO), produced by inducible nitric oxide synthase (iNOS), has been suggested to cause nitrative and oxidative stress, leading to the accumulation of 8-nitroguanine (8-NitroG) and 8-hydroxy-2′-deoxyguanosine (8-OHdG) and the subsequent transversion mutation of DNA. The aim of this study was to evaluate iNOS expression and the status of nitrative and oxidative stress in NPC. Fifty-nine cases of NPC and 39 cases of chronic nasopharyngitis were investigated to examine the expression of iNOS and the formation of 8-NitroG and 8-OHdG, using double-immunofluorescent staining. The statistical differences in immunoreactivities were analyzed using the Mann-Whitney test. Thirty-six patients from the 57 cases of NPC and 36 healthy controls were investigated to examine the level of serum 8-OHdG, using enzyme-linked immunosorbent assay (ELISA). The statistical differences were analyzed using a t test. Strong DNA lesions were observed in the cancer cells of NPC patients. All cases of NPC were positive for 8-NitroG and 8-OHdG, and 54 (94.7%) were positive for iNOS. NPC samples exhibited significantly more intense staining for 8-NitroG, 8-OHdG and iNOS than those of chronic nasopharyngitis ( P < 0.05, respectively). The mean value of serum 8-OHdG in the 36 NPC patients was 0.538 ± 0.336 ng/ml compared to 0.069 ± 0.059 ng/ml for the healthy controls. The difference in the serum levels of 8-OHdG between the NPC patients and controls was statistically significant ( P < 0.05). Our present findings suggest that pathological stimulation of nasopharyngeal tissue, caused by bacterial, viral or parasitic inflammation, may lead to nitrative and oxidative DNA lesions, caused by NO. This may contribute to the cause and development of NPC. Thus, 8-NitroG and 8-OHdG could be potential biomarkers for evaluating the risk of NPC. Better understanding of the molecular mechanisms underlying nitrative and oxidative DNA damage may provide clues to molecular targets for new approaches of NPC prevention. [ABSTRACT FROM AUTHOR]
- Published
- 2011
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258. Enhanced photorefractive phase conjugate properties in 45o-cut Ce:BaTiO3.
- Author
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Zhang, Daofan, Niu, Xiaojuan, Zhou, Tang, Wu, Xing, and Zhu, Yong
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- 1996
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259. Allopatric divergence and phylogeographic structure of the plateau zokor ( Eospalax baileyi), a fossorial rodent endemic to the Qinghai–Tibetan Plateau.
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Li-Zhou Tang, Liu-Yang Wang, Zhen-Yuan Cai, Tong-Zuo Zhang, Hai-Xin Ci, Gong-Hua Lin, Jian-Ping Su, and Jian-Quan Liu
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BIOLOGICAL divergence , *PHYLOGEOGRAPHY , *RODENTS , *MITOCHONDRIAL DNA , *NUCLEOTIDE sequence , *LAST Glacial Maximum - Abstract
Aim Most species of temperate regions are believed to have shifted to lower latitudes or elevations during the glacial periods of the Quaternary. In this study we test whether this phylogeographic assumption is also true for the plateau zokor ( Eospalax baileyi), a fossorial rodent endemic to the climate-sensitive Qinghai–Tibetan Plateau (QTP), which ranges in elevation from 2600 to 4600 m. Location The QTP of western China. Methods Phylogeographic analyses were conducted based on the mitochondrial cytochrome b gene sequences of 193 individuals from 20 populations over the entire range of the species. Results A total of 54 haplotypes identified in the present study clustered into four geographically correlated clades located in the interior of the QTP (clade A) and at the plateau edge (B, C and D). Molecular calibrations suggest that the interior plateau (A) and plateau-edge (B–D) clades diverged at 1.2 Ma and that the three plateau-edge clades diverged between 0.85 and 0.80 Ma. These estimates are concordant with diastrophism and glaciation events in the QTP. Coalescent tests rejected both the hypothesis that all current populations originated from a single refugium at a low elevation during the Last Glacial Maximum (LGM) and the hypothesis that the two lineages diverged during the LGM. The tests instead supported the hypothesis that there were four refugia during the LGM, and that the four clades diverged prior to the late Pleistocene. Main conclusions Our results suggest that Quaternary diastrophisms and glaciations repeatedly promoted allopatric divergence of the plateau zokor into geographical clades, and that these regional clades subsequently persisted at high elevations, rather than migrating to the low-elevation plateau edge during subsequent glacial ages. [ABSTRACT FROM AUTHOR]
- Published
- 2010
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260. Bacteriology of postradiotherapy chronic rhinosinusitis in nasopharyngeal carcinoma patients and chronic rhinosinusitis.
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Ze-Yi Deng and An-Zhou Tang
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PARANASAL sinus surgery , *SINUSITIS treatment , *STAPHYLOCOCCUS , *MICROBIOLOGY , *STAPHYLOCOCCUS aureus infections , *MAXILLARY sinus , *PSEUDOMONAS , *CHRONIC diseases - Abstract
The purpose of this study was to investigate and compare the bacteriology of postradiotherapy chronic rhinosinusitis (postRT-CRS) and chronic rhinosinusitis (CRS) by evaluating the aspiration materials of the maxillary sinus of patients with postRT-CRS and patients with CRS. We collected the secretions of the maxillary sinus from 30 nasopharyngeal carcinoma patients with postRT-CRS and 30 patients with CRS for aerobe/facultative anaerobe bacteria culture. The most common isolates in the postRT-CRS group were Streptocuccus viridans, Staphylococcus aureus and Haemophilus influenzae, while those in the CRS group were Haemophilus influenzae, Pseudomonas aeruginosa and Staphylococcus aureus. Isolated Gram-positive coccus rate in postRT-CRS patients was significantly higher than in CRS patients (62.50% compared with 30.00%, respectively; P < 0.05), and isolated Gram-negative bacilli rate in postRT-CRS patients was significantly lower than in CRS patients (31.25% compared with 70.00%, respectively; P < 0.05). However, the incidence of positive cultures was not significantly different between the postRT-CRS group and the CRS group ( P > 0.05). This study found that there were some differences in bacteriology between postRT-CRS and CRS. Gram-positive coccus was the predominant aerobic/facultative anaerobe pathogenic bacterium in patients with postRT-CRS, and Gram-negative bacilli was predominant in CRS patients. [ABSTRACT FROM AUTHOR]
- Published
- 2009
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261. STUDIES OF NEW SUPERCONDUCTING SYSTEM BY INFRARED AND RAMAN SPECTROSCOPY.
- Author
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LIU, JINGQING, YAN, YIFENG, ZHOU, TANG, CHE, GUANGCAN, CHANG, DAWEI, CHEN, WEI, WANG, YANYUN, and ZHAO, ZHONGXIAN
- Published
- 1988
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262. MBE growth of high performance very long wavelength InGaAs/GaAs quantum well infrared photodetectors.
- Author
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Heming Yang, Yuanliao Zheng, Zhou Tang, Ning Li, Xiaohao Zhou, Pingping Chen, and Jiqing Wang
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QUANTUM wells ,MOLECULAR beam epitaxy ,PHOTODETECTORS ,AUDITING standards ,TRANSMISSION electron microscopes ,LOW temperatures - Abstract
We report on the effects of two different molecular beam epitaxy growth modes on the performance of In
0.14 Ga0.86 As/GaAs quantum well infrared photodetectors (QWIPs). The performance of quantum well (QW) materials are characterized by photoluminescence (PL), x-ray diffraction, and high resolution transmission electron microscope, and a systematic photoelectric characterization is carried out for these InGaAs/GaAs QWIPs. The results indicate that the introduction of continuous low temperature growth can effectively reduce In atom interdiffusion while maintaining the higher PL intensity. QWIPs grown by the low temperature method show the bound-to-bound intraband transition mode as initially designed, whereas the high temperature during the growth makes the operating mode of the device changing to bound-to-quasi continuous mode, which affects the performance of the quantum well infrared photodetectors. Compared with InGaAs/GaAs QWIP fabricated by the temperature-changed growth method, the peak responsivity of the low-temperature grown sample is increased by a factor of 38 and reaches 5.67 A W−1 at 20 K, indicating high responsivity of InGaAs/GaAs QWIP. The reason is attributed to the pronounced increase of photoconductive gain in the device with the B–B working mode. Furthermore, the background limited performance temperature (TBLIP ) of low-temperature grown QWIPs is improved by ~10 K. [ABSTRACT FROM AUTHOR]- Published
- 2020
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263. Study on the stress and deformation of a diaphragm compressor cylinder head under extreme conditions.
- Author
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Ting Wang, Zhou Tang, and Xiaohan Jia
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- 2019
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264. Modelling the Cylinder Cooling in an Oil-free Reciprocating Air Compressor.
- Author
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Zhou Tang, Ting Wang, Bin Zhao, Mingfeng Wang, and Xueyuan Peng
- Published
- 2019
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265. STUDIES OF NEW SUPERCONDUCTING Bi-Sr-Ca-Cu-O SYSTEM BY INFRARED AND RAMAN SPECTROSCOPY
- Author
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LIU, JINGQING, primary, YAN, YIFENG, additional, ZHOU, TANG, additional, CHE, GUANGCAN, additional, CHANG, DAWEI, additional, CHEN, WEI, additional, WANG, YANYUN, additional, and ZHAO, ZHONGXIAN, additional
- Published
- 1988
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266. Long wavelength infrared quantum cascade detector with a broadband response.
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Liang Li, Xiaohao Zhou, Zhou Tang, Yuwei Zhou, Yuanliao Zheng, Ning Li, Pingping Chen, Zhifeng Li, and Wei Lu
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QUANTUM cascade lasers ,BROADBAND communication systems ,INFRARED radiation - Abstract
A novel structure to achieve long wavelength infrared broadband detection ranging from 7.6–10.4 µm is proposed via quantum cascade detector. With a pair of identical coupled quantum wells separated by a thin barrier, acting as absorption regions, the relative linewidth (ΔE/E) of response can be dramatically broadened to 30.7%. Moreover, this structure introduces about 30% enhancement in blackbody responsivity. It is shown that the spectral shape can be tuned by the bias voltage effectively, while it is insensitive to the working temperature. The device can work at liquid nitrogen temperature with Johnson noise limited blackbody detectivity of 5.4 × 10
8 Jones. [ABSTRACT FROM AUTHOR]- Published
- 2018
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267. THE MEASURMENTS OF THE REFRACTIVE INDICES AND THE TRANSMISSIVITIES OF Sr4NaLiNb10O30 SINGLE CRYSTALS
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Zhou Tang and Mai Zhen-Hong
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Optics ,Materials science ,business.industry ,Czochralski method ,General Physics and Astronomy ,business ,Refractive index ,Visible spectrum - Abstract
It was the first time to investigate the refractive indices and the transmissivities of Sr4NaLiNb10O30 single crystals grown by the Czochralski method in the visible wavelength region. The experiment errors were discussed.
- Published
- 1981
268. CRYSTAL GROWTH, MORPHOLOGY AND OPTICAL PROPERTY OF COMPLEX SALT KIO3 2LiIO3
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Hu Bo-Qing, Ma Wen-Yi, and Zhou Tang
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chemistry.chemical_classification ,Materials science ,Morphology (linguistics) ,business.industry ,Optical property ,General Physics and Astronomy ,Salt (chemistry) ,Infrared spectroscopy ,Crystal growth ,Refraction ,Crystal ,Crystallography ,Optics ,chemistry ,business ,Visible spectrum - Abstract
The growth condition of the complex crystal KIO3·LiIO3 and its infrared spectra have been investigated. The morphology of the crystal has been determined. Its class is 2/m. The parameters of its cell are a = 11.189, b = 11.038, c = 8.262, β = 111°27′. The position of the optical indicatoid for the crystal, the refraction indices in the range of visible light and their Sellmeier's equations have been given.
- Published
- 1980
269. OPTICAL CHARACTERISTICS OF SINGLE CRYSTAL LITHIUM TRINIOBATE LiNb3O8
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Zhou Tang, Tian Wan-Chun, and Hu Bo-Qing
- Subjects
Atmospheric water ,Crystallography ,Annealing (metallurgy) ,Chemistry ,Hydrogen bond ,Analytical chemistry ,General Physics and Astronomy ,Crystal growth ,Crystal structure ,Chemical reaction ,Single crystal ,Refractive index - Abstract
The transmit tance curve of the LiNb3O8 crystal is determined. It is clear that the existence of oxygen vacancy is the basic reason of blackening of the crystal and the black colour can be bleached by annealing. It is shown that the cause of the hydrogen bond formation is a chemical reaction of the atmospheric water vapor with the melt. Vacumm annealing is a method to eliminate the hydrogen bond. Crystal growth in pure oxygen atmosphere is suggested. Three principle indices of the LiNb3O8 crystal and the directions of corresponding principle axes with respect to crystallographic axes are determined. And the refractive index of the LiNb3O8 crystal is compared with that of the LiNbO3 crystal. The relationship of the principle indices with the crystal structure is discussed.
- Published
- 1983
270. Effects of 12-week aerobic exercise with different frequencies on executive function in preschool children: a cluster randomized controlled trial.
- Author
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He, Changshuang, Peng, Xiaoying, Zhang, Jinming, Cheng, Wei, Guo, Shaoyu, Hu, Wenwen, Fang, Chunyi, Huan, Muyang, Lu, Yanhua, Sang, Menghao, Zhou, Tang, Wu, Hua, Li, Longkai, and Quan, Minghui
- Abstract
AbstractObjectiveMethodResultsConclusionTo explore the effects of a 12-week aerobic exercise program with different frequencies on executive functions (EFs) in preschool children.Four kindergartens, comprising 126 preschool children in Shanghai, were enrolled in this 12-week cluster randomized controlled trial with a 12-week follow-up period. Kindergartens were allocated to high-frequency (three times a week) or low-frequency (once a week) exercise groups using stratified block randomization. Three core sub-EFs, including inhibition, working memory, and cognitive flexibility, were assessed at baseline, post-intervention, and the 12-week follow-up.Compared to baseline, both groups showed significant improvements in inhibition and working memory after the intervention and at the 12-week follow-up. However, only the high-frequency exercise group demonstrated a significant improvement in cognitive flexibility after the follow-up period. Nonetheless, there were no significant differences in the core sub-functions of EFs between the two groups at the end of the intervention or the follow-up periods.A 12-week aerobic exercise of three times a week was insufficient to significantly improve EFs in preschool children compared to once a week. Future studies are needed to examine the dose-response relationship of aerobic exercise on EFs and to verify the effects of different exercise modalities on EFs in preschool children. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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271. Numerical study of hydraulic fracturing in the sectorial well-factory considering well interference and stress shadowing.
- Author
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Yu-Hao Liu, Jin-Tao Zhang, Jie Bai, Feng-Shou Zhang, and Ji-Zhou Tang
- Abstract
In the Changqing Oilfield in northwest China, when traditional petroleum exploitation encounters forestry reserves or water source protection areas, sectorial well-factory design is proposed. The most distinct feature of a sectorial well-factory is the deviation of the well from the minimum horizontal principal stress, resulting in hydraulic fracture deflection after the initiation, along with possible well interference (i.e., fracture hit) and fracture coalescence in the oblique wells. Four indexes describing well deflection are then proposed according to fracture morphology. Several fracturing designs, including stage arrangement, fracturing sequences, and fracturing techniques are applied to study the feasibility of the sectorial well-factory design. The results show that the “gradual” or “sparse” stage arrangement, large injection rate, and simultaneous multifracture treatment can help to optimize the fracture morphology and stimulation design. However, the subsequent stress shadowing effect usually adversely affects the fracturing of adjacent wells. With a small initial horizontal stress difference, large injection rate and staggered stage arrangement can achieve ideal stimulation performance. Our results can provide a guidance for optimizing stimulation design in unconventional well-factory while taking into account environmental protection. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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272. Repeated horizontal transfers of four DNA transposons in invertebrates and bats
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Min-Jin Han, Zhou Tang, Hua-Hao Zhang, Xiao-Gu Zhang, Ze Zhang, and Ke Huang
- Subjects
Transposable element ,Genetics ,Mammals ,Research ,myr ,Horizontal transfer ,Biology ,Recent activity ,Genome ,CACTA transposons ,Homology (biology) ,chemistry.chemical_compound ,chemistry ,Horizontal gene transfer ,Molecular Biology ,Developmental biology ,DNA ,Orthologous Gene - Abstract
Background Horizontal transfer (HT) of transposable elements (TEs) into a new genome is considered as an important force to drive genome variation and biological innovation. However, most of the HT of DNA transposons previously described occurred between closely related species or insects. Results In this study, we carried out a detailed analysis of four DNA transposons, which were found in the first sequenced twisted-wing parasite, Mengenilla moldrzyki. Through the homology-based strategy, these transposons were also identified in other insects, freshwater planarian, hydrozoans, and bats. The phylogenetic distribution of these transposons was discontinuous, and they showed extremely high sequence identities (>87%) over their entire length in spite of their hosts diverging more than 300 million years ago (Mya). Additionally, phylogenies and comparisons of transposons versus orthologous gene identities demonstrated that these transposons have transferred into their hosts by independent HTs. Conclusions Here, we provided the first documented example of HT of CACTA transposons, which have been so far extensively studied in plants. Our results demonstrated that bats had continuously acquired new DNA elements via HT. This implies that predation on a large quantity of insects might increase bat exposure to HT. In addition, parasite-host interaction might facilitate exchanging of their genetic materials. Electronic supplementary material The online version of this article (doi:10.1186/s13100-014-0033-1) contains supplementary material, which is available to authorized users.
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273. “Living High-Training Low” improved weight loss and glucagon-like peptide-1 level in a 4-week weight loss program in adolescents with obesity
- Author
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Yang, Qin, Huang, Guoyuan, Tian, Qianqian, Liu, Wei, Sun, Xiangdong, Li, Na, Sun, Shunli, Zhou, Tang, Wu, Nana, Wei, Yuqin, Chen, Peijie, Wang, Ru, and Hamasaki., Hidetaka
- Published
- 2018
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274. Rubroshiraia gen. nov., a second hypocrellin-producing genus in Shiraiaceae (Pleosporales).
- Author
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Dong-Qin Dai, Wijayawardene, Nalin N., Li-Zhou Tang, Chao Liu, Li-Hong Han, Hong-Long Chu, Hai-Bo Wang, Chun-Fang Liao, Er-Fu Yang, Rui-Fang Xu, Yun-Min Li, Hyde, Kevin D., Bhat, D. Jayarama, and Cannon, Paul F.
- Subjects
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PHYTOPATHOGENIC fungi , *PHYTOPATHOGENIC microorganisms , *ASCOSPORES , *METABOLITES - Abstract
Shiraiaceae is an important family in Pleosporales (Dothideomycetes), which includes medical fungi and plant pathogens. Two hypocrellin-producing taxa, Shiraia bambusicola and a novel genus Rubroshiraia gen. nov., typified by Rubroshiraia bambusae are treated in this article. Maximum likelihood analysis, generated via RAxML (GTR+G model), using a combined SSU, LSU, TEF1 and RPB2 sequence dataset, shows that Rubroshiraia is close to Shiraia and belongs to the family Shiraiaceae. Descriptions, illustrations and a taxonomic key are provided for the genera in Shiraiaceae. Rubroshiraia morphologically differs from Shiraia in having small and dark ascostromata and filiform ascospores. Production of the ascostromatal metabolites, hypocrellin A and B, were examined by HPLC and spectrophotometer. The content of hypocrellin A and B of specimen HKAS 102255 (R. bambusae) is twice that produced by HKAS 102253 (S. bambusicola). To clarify the relationship between R. bambusae and Hypocrella bambusae, type material of the latter was examined and provided the illustration. [ABSTRACT FROM AUTHOR]
- Published
- 2019
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275. Microscale crack propagation in shale samples using focused ion beam scanning electron microscopy and three-dimensional numerical modeling.
- Author
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Xin Liu, Si-Wei Meng, Zheng-Zhao Liang, Chun'an Tang, Jia-Ping Tao, and Ji-Zhou Tang
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SHALE oils , *SCANNING electron microscopy , *ELECTRON beams , *CRACK propagation (Fracture mechanics) , *DIGITAL image processing , *SHALE , *FOCUSED ion beams , *ION bombardment - Abstract
Reliable prediction of the shale fracturing process is a challenging problem in exploiting deep shale oil and gas resources. Complex fracture networks need to be artificially created to employ deep shale oil and gas reserves. Randomly distributed minerals and heterogeneities in shales significantly affect mechanical properties and fracturing behaviors in oil and gas exploitation. Describing the actual microstructure and associated heterogeneities in shales constitutes a significant challenge. The RFPA3D (rock failure process analysis parallel computing program)-based modeling approach is a promising numerical technique due to its unique capability to simulate the fracturing behavior of rocks. To improve traditional numerical technology and study crack propagation in shale on the microscopic scale, a combination of highprecision internal structure detection technology with the RFPA3D numerical simulation method was developed to construct a real mineral structure-based modeling method. First, an improved digital image processing technique was developed to incorporate actual shale microstructures (focused ion beam scanning electron microscopy was used to capture shale microstructure images that reflect the distributions of different minerals) into the numerical model. Second, the effect of mineral inhomogeneity was considered by integrating the mineral statistical model obtained from the mineral nanoindentation experiments into the numerical model. By simulating a shale numerical model in which pyrite particles are wrapped by organic matter, the effects of shale microstructure and applied stress state on microcrack behavior and mechanical properties were investigated and analyzed. In this study, the effect of pyrite particles on fracture propagation was systematically analyzed and summarized for the first time. The results indicate that the distribution of minerals and initial defects dominated the fracture evolution and the failure mode. Cracks are generally initiated and propagated along the boundaries of hard mineral particles such as pyrite or in soft minerals such as organic matter. Locations with collections of hard minerals are more likely to produce complex fractures. This study provides a valuable method for understanding the microfracture behavior of shales. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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276. Atypicalities in the developmental trajectory of cortico-striatal functional connectivity in autism spectrum disorder.
- Author
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Zeng-Hui Ma, Bin Lu, Xue Li, Ting Mei, Yan-Qing Guo, Liu Yang, Hui Wang, Xin-Zhou Tang, Zhao-Zheng Ji, Jing-Ran Liu, Ling-Zi Xu, Yu-Lu Yang, Qing-Jiu Cao, Chao-Gan Yan, and Jing Liu
- Subjects
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BRAIN physiology , *ACADEMIC medical centers , *CROSS-sectional method , *MAGNETIC resonance imaging , *AUTISM , *DESCRIPTIVE statistics , *INTELLECT - Abstract
The last decades of neuroimaging research has revealed atypical development of intrinsic functional connectivity within and between large-scale cortical networks in autism spectrum disorder, but much remains unknown about cortico-subcortical developmental connectivity atypicalities. This study examined cortico-striatal developmental intrinsic functional connectivity changes in autism spectrum disorder and explored how those changes may be correlated with autistic traits. We studied 49 individuals with autism spectrum disorder and 52 age-, sex-, and head motion–matched typically developing individuals (5–30 years old (14.0 ± 5.6)) using resting-state functional magnetic resonance imaging. Age-related differences in striatal intrinsic functional connectivity were compared between the two groups by adopting functional network–based parcellations of the striatum as seeds. Relative to typically developing individuals, autism spectrum disorder individuals showed atypical developmental changes in intrinsic functional connectivities between almost all striatal networks and sensorimotor network/ default network, with connectivity increasing with age in the autism spectrum disorder group and decreasing or constant in typically developing individuals. Age-related degree centrality and voxel-mirrored homotopic connectivity atypicalities in sensorimotor network/default network and voxel-mirrored homotopic connectivity disruptions in striatal regions were also observed in autism spectrum disorder. Significant correlations were found between cortico-striatal intrinsic functional connectivities and Autism Diagnostic Observation Schedule communication/repetitive and restricted-behavior subscores in autism spectrum disorder. Our results indicated that developmental atypicalities of cortico-striatal intrinsic functional connectivities might contribute to the neuropathology of autism spectrum disorder. [ABSTRACT FROM AUTHOR]
- Published
- 2022
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277. Associations between Daily Step Counts and Physical Fitness in Preschool Children.
- Author
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Fang, Chunyi, Zhang, Jinming, Zhou, Tang, Li, Longkai, Lu, Yaofei, Gao, Zan, and Quan, Minghui
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PRESCHOOL children , *PHYSICAL fitness , *PHYSICAL fitness testing , *CARDIOPULMONARY fitness , *BROAD jump - Abstract
Purpose: To investigate the relationships between daily step counts and physical fitness in preschool children. Methods: Preschoolers' step counts were assessed by ActiGraph accelerometers consecutively for seven days. Physical fitness was assessed by a 20 m shuttle run test (cardiorespiratory fitness), the handgrip and standing long jump tests (musculoskeletal fitness), and the 2 × 10 m shuttle run test (speed/agility). A composite score was created from the mean of the standardized values of all physical fitness tests. Results: A total of 301 preschoolers (134 girls, mean age 57.40 ± 5.47 months; 167 boys, mean age 58.10 ± 5.34 months) were included in the final analysis. Compared with the lowest tertile, boys and girls in the highest tertile of step counts achieved high physical fitness with odds ratio (OR) being 5.39 (95% CI = 1.65–17.59) and 4.42 (95% CI = 1.30–14.99), respectively, after adjusting for confounders. Meanwhile, a relationship was observed for each 1000 steps/day increment being associated with 43% (OR = 1.43, 95% CI = 1.10–1.85) and 62% (OR = 1.62, 95% CI = 1.20–2.19) increment for high physical fitness in boys and girls, respectively. In addition, significant non-linear relationship was observed between daily steps and physical fitness in boys, which indicated that accumulated 8000 steps/day was associated with the highest ratio to achieve high physical fitness. Conclusions: Positive relationships between step counts and physical fitness were observed in preschool children, and the relationships were strongest for those who accumulated 8000 steps/day in boys. To confirm the findings in this study, well-designed and large-scale longitudinal studies are needed in the future. [ABSTRACT FROM AUTHOR]
- Published
- 2020
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278. Effect of modified iodine on defect structure and antibacterial properties of ZnO in visible light.
- Author
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Lin, Qian-Ying, Lin, Qun, Zhang, Yi-Qiu, Lin, Hua-Xiang, Zhou, Tang-Hua, Ning, Shang-Bo, and Wang, Xu-Xu
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IODINE , *ZINC oxide , *CRYSTAL structure , *CRYSTAL morphology , *SPOT tests (Chemistry) , *REACTIVE oxygen species - Abstract
Iodine-modified ZnO with oxygen vacancies were synthesized by the solvothermal method. The crystal structure, morphology, optical properties and defects of as-prepared samples were characterized by XRD, SEM, DRS, XPS and ESR. The photocatalytic disinfection activity of I-modified ZnO in the dark and under visible light irradiation were investigated by the antibacterial drop-test method. The results showed that the iodine mainly exists in the form of I in the ZnO. The modified iodine increases the numbers of oxygen vacancies of ZnO as the amount of iodine increases. In addition, the I-ZnO exhibits much higher antibacterial activity than that of pure ZnO and was stable during the photocatalytic process. The enhanced antibacterial activity of I-ZnO is attributed to the co-operation of the oxygen vacancies and the iodine which promotes the separation of photo-generated carriers and subsequently produces more ROS (reactive oxygen species). Graphical Abstract: [ABSTRACT FROM AUTHOR]
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- 2017
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279. A facile mechanochemical way to prepare g-C3N4
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Zhao, Huaizhou, Chen, X.L., Jia, Chengchang, Zhou, Ting, Qu, Xuanhui, Jian, Jikang, Xu, Yanping, and Zhou, Tang
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- *
PHYSICAL & theoretical chemistry , *CARBON , *QUANTUM chemistry , *LIGHT elements - Abstract
Abstract: Under the conditions of high-energy ball milling, the reaction of C3N3Cl3 and Li3N has progressed in a high-efficient way. Carbon nitride with the atomic ratio of 1.23–1.30 for N to C that is very similar to the stoichiometry of C3N4 was obtained. XRD reveals that with the prolonging of the milling time, the products can be transformed to comparatively well-crystallized graphitic carbon nitride (g-C3N4). SEM investigations show the products have the glassy morphology with different sizes from micron to nano scales. XPS analysis shows the products have the presumable element compositions and the chemical bond state. [Copyright &y& Elsevier]
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- 2005
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280. Growth of birefringent Ca3(BO3)2 crystals by the Czochralski method
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Zhang, Shuyu, Wu, Xing, Song, Youting, Ni, Daiqin, Hu, Boqing, and Zhou, Tang
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DOUBLE refraction , *REFRACTIVE index - Abstract
Large novel birefringent Ca3(BO3)2 crystals have been grown successfully by the Czochralski method. The optical transmission and the refractive indices of the crystal have been measured as a function of wavelength. The appropriate Sellmeier dispersion equations have been obtained. The results show that the crystal has a wide transmission range from 180 to 3800 nm, and the birefringence is as large as −0.0968 at 630 nm. [Copyright &y& Elsevier]
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- 2003
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281. China Tilts Green.
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Oster, Shai, Bellman, Eric, and Zhou Tang
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GLOBAL warming - Abstract
The article reports on the decision of the Chinese government to prepare its first national strategy for combating global warming.
- Published
- 2007
282. Preschoolers’ Technology-Assessed Physical Activity and Cognitive Function: A Cross-Sectional Study.
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Quan, Minghui, Zhang, Hanbin, Zhang, Jiayi, Zhou, Tang, Zhang, Jinming, Zhao, Guanggao, Fang, Hui, Sun, Shunli, Wang, Ru, and Chen, Peijie
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PRESCHOOL children , *PHYSICAL activity , *COGNITIVE ability , *INTELLIGENCE levels , *MENTAL health - Abstract
Early childhood is a critical period for development of cognitive function, but research on the association between physical activity and cognitive function in preschool children is limited and inconclusive. This study aimed to examine the association between technology-assessed physical activity and cognitive function in preschool children. A cross-sectional analysis of baseline data from the Physical Activity and Cognitive Development Study was conducted in Shanghai, China. Physical activity was measured with accelerometers for 7 consecutive days, and cognitive functions were assessed using the Chinese version of Wechsler Young Children Scale of Intelligence (C-WYCSI). Linear regression analyses were used to assess the association between physical activity and cognitive function. A total of 260 preschool children (boys, 144; girls, 116; mean age: 57.2 ± 5.4 months) were included in analyses for this study. After adjusting for confounding factors, we found that Verbal Intelligence Quotient, Performance Intelligence Quotient, and Full Intelligence Quotient were significantly correlated with light physical activity, not moderate to vigorous physical activity, in boys. Standardized coefficients were 0.211, 0.218, and 0.242 (all
p < 0.05) in three different models, respectively. However, the correlation between physical activity and cognitive functions were not significant in girls (p > 0.05). These findings suggest that cognitive function is apparently associated with light physical activity in boys. Further studies are required to clarify the sex-specific effect on physical activity and cognitive functions. [ABSTRACT FROM AUTHOR]- Published
- 2018
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283. Correlation between lumbar intervertebral disc height and lumbar spine sagittal alignment among asymptomatic Asian young adults.
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Zhang, Feng, Zhang, Kai, Tian, Hai-Jun, Wu, Ai-Min, Cheng, Xiao-Fei, Zhou, Tang-Jun, and Zhao, Jie
- Subjects
- *
LUMBAR vertebrae physiology , *INTERVERTEBRAL disk , *COMPUTER software , *MAGNETIC resonance imaging , *SPINE diseases , *PELVIS , *PANORAMIC radiography , *REFERENCE values , *STATISTICS , *DATA analysis , *BODY movement , *SPINAL curvatures , *ADULTS , *PHYSIOLOGY ,SPINE diseases diagnosis - Abstract
Background: To investigate the distribution and characteristics of the lumbar intervertebral disc height (IDH) in asymptomatic Asian population and to determine whether the lumbar IDH is related to the lumbar spine sagittal alignment. Methods: A cohort of 169 cases of asymptomatic volunteers was enrolled from January 2014 to July 2016. All participants underwent magnetic resonance imaging of the lumbar spine and panoramic radiography of the spine. Panoramic radiographs of the spine were taken to evaluate pelvic incidence (PI), sacral slope (SS), and pelvic tilt (PT) using Surgimap® software. Roussouly classification was utilized to categorize all subjects according to the four subtypes of sagittal alignment. The IDH was measured on the MRI mid-saggital section of the vertebral body. The relationships between lumbar IDH and spine-pelvic parameters were also assessed using the Spearman correlation analysis. Results: The reference value ranges of IDH in asymptomatic Asian volunteers between L1/2, L2/3, L3/4, L4/5, and L5/S1 were (6.25, 10.99), (6.97, 12.08), (7.42, 13.3), (7.76, 14.57),and (7.11, 13.12) mm, respectively. Based on the above reference value, the high lumbar intervertebral space is defined as more than 14 mm. According to the Roussouly Classification, there are 33 cases in type I, 48 in type II, 66 in type III, and 22 in type IV. According to the definition of the high IDH, there are two cases in type I, three in type II, nine in type III, and eight in type IV. The results indicated that people in the Roussouly III and IV subtypes had greater values for IDH compared to those of Roussouly I and II subtypes, and the spinopelvic parameters were partly correlated with IDH in different subtypes. In addition, levels L4–L5 showed the highest IDH for all four groups followed by the L3–L4 and L5–S1 levels, and the value of L3–L4 is equivalent to that of L5–S1. All type groups showed moderate and positive correlations between the PI and IDH except the level of L1–L2 in type IV. Conclusions: The IDH may influence the lumbar spine sagittal alignment in asymptomatic Asian adults. Moreover, pre-operative evaluation of IDH is useful for selection of optimal cage size and reconstruction of spinal alignment. [ABSTRACT FROM AUTHOR]
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- 2018
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284. Preclinical Development of SHR-1819, a Potent Humanized IL-4Rα Antibody for Treating Type 2 Inflammatory Diseases.
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Zhao G, Wang Z, Zhang J, Lin Y, Zhou T, Liu K, Yang C, and Liao C
- Abstract
Background: Interleukin (IL)-4 and IL-13 are critical pathogenic factors for type 2 inflammation-related allergic diseases, sharing the mutual receptor subunit IL-4Rα. However, it was ineffective for certain type 2 inflammation diseases by targeting IL-4, IL-13 ligand alone or both in clinical studies. The work presented herein aimed to evaluate the preclinical efficacy and pharmacokinetics profile of a novel monoclonal antibody against IL-4Rα, SHR-1819, as a promising therapy for type 2 inflammation diseases., Methods: SHR-1819 was generated through immunization by C57BL/6 mice with recombinant hIL-4Rα protein, followed by humanization and affinity maturation. Then, its binding properties with IL-4Rα were determined using surface plasmon resonance (SPR) and ELISA. In vitro inhibitory effects of SHR-1819 were assessed on hIL-4-/hIL-13-induced cell proliferation and signal transducer and activator of transcription 6 (STAT6) signaling activation. In vivo efficacy of SHR-1819 was evaluated in several type 2 inflammatory diseases models, including asthma, atopic dermatitis (AD), and allergic rhinitis (AR) by using hIL-4/hIL-4Rα transgenic mice. Furthermore, the pharmacokinetic (PK) profiles of SHR-1819 were characterized., Results: SHR-1819 showed high binding affinity to human IL-4Rα and effectively blocked IL-4Rα at sub-nanomolar concentration. In vitro assays indicated that SHR-1819 significantly inhibited TF-1 cell proliferation and STAT6 activation induced by hIL-4/hIL-13. In the asthma model, SHR-1819 could reduce airway hyperresponsiveness, decrease serum IgE levels, and alleviated inflammatory lung cell infiltration. In the AD model, SHR-1819 could significantly alleviate inflammatory and skin symptoms. In the AR model, it could remarkably decrease the frequencies of nasal rubbing and sneezing, and inflammatory cell infiltration in nasal tissues. These in vivo efficacy studies demonstrated the therapeutic potential of SHR-1819 in preclinical disease models. Moreover, subcutaneous administration of SHR-1819 exhibited favorable bioavailability in mice., Conclusion: The results supported SHR-1819 as a promising preclinical candidate for the treatment of type 2 inflammatory diseases, including asthma, AD and AR., Competing Interests: The authors declare no competing interest in this work., (© 2024 Zhao et al.)
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- 2024
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285. Effects of weight-bearing dance aerobics on lower limb muscle morphology, strength and functional fitness in older women.
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Peng X, Zhou T, Wu H, Li Y, Liu J, Huang H, He C, Guo S, Huan M, Shi L, Chen P, and Quan M
- Subjects
- Humans, Female, Aged, Physical Fitness physiology, Lower Extremity physiology, Lower Extremity diagnostic imaging, Middle Aged, Muscle, Skeletal physiology, Muscle, Skeletal anatomy & histology, Muscle, Skeletal diagnostic imaging, Exercise physiology, Quadriceps Muscle physiology, Quadriceps Muscle diagnostic imaging, Quadriceps Muscle anatomy & histology, Muscle Strength physiology, Dancing physiology, Weight-Bearing physiology
- Abstract
Objective: To investigate the effects of 12-week weight-bearing dance aerobics (WBDA) on muscle morphology, strength and functional fitness in older women., Methods: This controlled study recruited 37 female participants (66.31y ± 3.83) and divided them into intervention and control groups according to willingness. The intervention group received 90-min WBDA thrice a week for 12 weeks, while the control group maintained normal activities. The groups were then compared by measuring muscle thickness, fiber length and pennation angle by ultrasound, muscle strength using an isokinetic multi-joint module and functional fitness, such as 2-min step test, 30-s chair stand, chair sit-and-reach, TUG and single-legged closed-eyed standing test. The morphology, strength, and functional fitness were compared using ANCOVA or Mann-Whitney U test to study the effects of 12 weeks WBDA., Results: Among all recruited participants, 33 completed all tests. After 12 weeks, the thickness of the vastus intermedius ( F = 17.85, P < 0.01) and quadriceps ( F = 15.62, P < 0.01) was significantly increased in the intervention group compared to the control group, along with a significant increase in the torque/weight of the knee flexor muscles ( F = 4.47, P = 0.04). Similarly, the intervention group revealed a significant improvement in the single-legged closed-eyed standing test ( z = - 2.16, P = 0.03) compared to the control group., Conclusion: The study concluded that compared to the non-exercising control group, 12-week WBDA was shown to thicken vastus intermedius, increase muscle strength, and improve physical function in older women. In addition, this study provides a reference exercise program for older women., Competing Interests: The authors declare that they have no competing interests., (© 2024 Peng et al.)
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- 2024
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286. Diarylheptanoids with neuroprotective effects from Alpinia officinarum rhizomes.
- Author
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Mu L, Wang J, Zhou T, Qiao W, Hu W, Zhang R, and Chen X
- Subjects
- Molecular Structure, Humans, Cell Line, Tumor, Phytochemicals pharmacology, Phytochemicals isolation & purification, Reactive Oxygen Species metabolism, China, Oxidative Stress drug effects, Nitric Oxide metabolism, Neuroprotective Agents pharmacology, Neuroprotective Agents isolation & purification, Diarylheptanoids pharmacology, Diarylheptanoids isolation & purification, Diarylheptanoids chemistry, Rhizome chemistry, Alpinia chemistry
- Abstract
Forty-three diarylheptanoids were isolated from Alpinia officinarum rhizomes among them eight ones (1-6) were undescribed compounds whose structures were identified by UV, IR, HRESIMS, and NMR. The neuroprotective effects of these diarylheptanoids were evaluated on H
2 O2 -damaged SH-SY5Y cells. Compounds 7, 10, 12, 20, 22, 25, 28, 33, 35, 37, and 42 presented significant neuroprotective effects than that of the positive control (EGCG) at the concentrations of 5, 10 or 20 μM. Compounds 10, 22, 25, and 33 significantly reduced the ROS levels and inhibited the generations of MDA and NO in oxidative injured cells to display neuroprotective effects. This study lay the foundation for the application of Alpinia officinarum rhizomes., Competing Interests: Declaration of competing interest The authors declare no competing financial interest., (Copyright © 2024. Published by Elsevier B.V.)- Published
- 2024
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287. Abietane diterpenoids with anti-neuroinflammation activity from Rosmarinus officinalis.
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Zhou T, Wang J, Lin Z, Zhu H, Hu W, Zhang R, and Chen X
- Subjects
- Abietanes pharmacology, Abietanes chemistry, Molecular Structure, Magnetic Resonance Spectroscopy, Rosmarinus chemistry, Diterpenes pharmacology, Diterpenes chemistry
- Abstract
A total of 12 abietane diterpenoids were isolated and identified from Rosmarinus officinalis in which 6 ones were undescribed compounds. Their structures were illuminated by the HRESIMS, NMR, and ECD methods and named as rosmarinusin Q-V (1-6). It worthy mentioned that rosmarinusin Q was a novel abietane diterpenoid with 6/6/5 skeleton whose C ring was an α,β-unsaturated five-element ketone. All the compounds and four compounds (13-16) reported in our previous paper were evaluated their anti-neuroinflammatory activities on the LPS-induced BV2 cells. Compounds 5, 8, 9, 11, and 15 displayed significant anti-neuroinflammatory activity at the concentration of 10, 20, and 40 μM respectively. These results confirmed that R. officinalis contained abundant abietane diterpenoids and these compounds showed potential values of anti-neuroinflammation which could be developed as neuroprotective agents for the treatment of nerve damage caused by inflammation., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2024 Elsevier B.V. All rights reserved.)
- Published
- 2024
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288. A single-agent fusion of human IL-2 and anti-IL-2 antibody that selectively expands regulatory T cells.
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Lin Y, Wang X, Qin Y, Wang C, Zhou T, Zhang L, Su L, Ren W, and Liao C
- Subjects
- Animals, Humans, Autoimmune Diseases drug therapy, Autoimmune Diseases therapy, Cytokines, Interleukin-2 immunology, Lupus Erythematosus, Systemic drug therapy, Lupus Erythematosus, Systemic therapy, T-Lymphocytes, Regulatory, Antibodies pharmacology, Antibodies therapeutic use
- Abstract
The occurrence of many autoimmune diseases takes root on the disrupted balance among Treg cells, Teff cells, etc. Low-dose interleukin-2 (IL-2) cytokine demonstrates promising clinical efficacy in the expansion of Treg cells and the treatment of autoimmune diseases. However, its clinical application is hindered by the small therapeutic index and short half-life. Previous studies have shown that non-covalent complex of human IL-2 and anti-IL-2 antibody biases cytokine activity towards Treg cells and extends IL-2's half-life. The clinical translation of such complex is non-trivial. In this study, we discover an anti-human IL-2 antibody and engineer a covalently-linked single-agent fusion of human IL-2 and its antibody that selectively expands Treg cells and exhibits superior disease control activity in animal models of ulcerative colitis and systemic lupus erythematosus, with proper safety profile and good developability. These studies pave the road for its clinical development in diverse autoimmune diseases., (© 2024. The Author(s).)
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- 2024
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289. Association between walking speed and calcaneus stiffness index in older adults.
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Zhou T, Wang J, Li Y, Lu Y, Liu J, Hong J, Quan M, Wang D, and Chen P
- Subjects
- Male, Female, Humans, Aged, Middle Aged, Cross-Sectional Studies, China, Nutritional Status, Walking, Walking Speed, Calcaneus diagnostic imaging
- Abstract
Introduction: The aim here is to examine the association between objectively measured usual walking speed (UWS) and bone status in community-dwelling older Chinese., Materials and Methods: This is a cross-sectional study of a population of 1528 adults (817 females, mean age 68.5 ± 5.3; 711 males, mean age 69.1 ± 5.2) aged 60-79, living in communities in Shanghai. Walking speed was assessed using a 4-m walk test at a usual-pace walking speed a walking speed at which the subject felt relaxed-and bone status measured by quantitative ultrasound (QUS). The health-related characteristics of participants include family background, physical activity level, chronic disease, smoking and alcohol consumption, frequency of falls, vitamin intake, and hormone therapy., Results: Multiple linear regression is used to analyses any association between UWS and bone status, adjusting for confounding factors showing a significant association between faster UWS and a higher calcaneal stiffness index (SI) (p < 0.01). Comparing the lowest quartile of the data set with the highest at UWS, a high SI is achieved with 5.34 (95% CI = 3.22, 7.46) (p < 0.01), after adjusting for confounders. An increase of 1 dm/s was associated with a 0.91 (95% CI = 0.53, 1.29) increase in SI. This relationship for most subgroups is consistent., Conclusion: Our findings suggest that UWS can be a sensitive indicator of calcaneal bone loss among an older population., (© 2023. The Japanese Society Bone and Mineral Research.)
- Published
- 2023
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290. Relationship Between Gross Motor Skills and Inhibitory Control in Preschool Children: A Pilot Study.
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Liu J, Li Y, Zhou T, Lu Y, Sang M, Li L, Fang C, Hu W, Sun X, Quan M, and Liu J
- Abstract
Purpose: Gross motor skills (GMS) and inhibitory control (IC) which are both development in preschool stage is significant for preschooler to healthy growth. However, the evidence of relationship between them in preschoolers are still insufficient, most of studies only focus on youth. Thus, the aim of this research is to examine the association between GMS and IC in preschool children., Methods: This cross-sectional study used baseline data from a previous intervention study of preschoolers conducted in 2018. GMS were assessed by using the Test for Gross Motor Development (2nd edition) in preschoolers, which includes two subtests of locomotor and object control skills. Total GMS is calculated from the sum of these two subtests. The Fish Flanker task was used to evaluate both accuracy and reaction time of IC. Multivariate linear regression models were established to analyze the relationships between GMS and IC., Results: A total of 123 preschool-age children (55 girls, 68 boys) were included in the final analysis. After adjusting for confounders, GMS (β = -8.27 ms, 95%CI: -14.2, -2.34), locomotor (β = -11.2 ms, 95%CI: -21.43, -0.97), and object control skills (β = -12.15 ms, 95%CI: -22.07, -2.23) were all negatively related with reaction time of IC., Conclusion: There was a significant negative correlation between gross motor skills and the reaction time of inhibitory control in preschool children. Further research is needed to verify this finding in prospective and experimental studies., Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest., (Copyright © 2022 Liu, Li, Zhou, Lu, Sang, Li, Fang, Hu, Sun, Quan and Liu.)
- Published
- 2022
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291. The association between the health-related physical fitness and inhibitory control in preschool children.
- Author
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Li Y, Zhou T, Lu Y, Sang M, Liu J, He X, and Quan M
- Subjects
- Adolescent, Body Mass Index, Child, Preschool, Cross-Sectional Studies, Humans, Male, Physical Fitness, Exercise Test, Hand Strength
- Abstract
Background: Inhibitory control develops rapidly during the preschool stage, and development of inhibitory control in this period is significant for the healthy growth of the future. However, most studies paid more attention to children and adolescents in recent years, but less focus on preschool children. Therefore, the purpose of this study was to explore the association between the health-related physical fitness and inhibitory control in preschool children., Methods: This cross-sectional study was based on a baseline data from randomized controlled trial by cluster sampling(including 128 preschoolers, 70 boys, 58girls).The health-related physical fitness T-score (HPFT) was obtained by adding standard scores of six indicators: body mass index, handgrip strength, standing long jump, one-leg balance, 2 × 10 m shuttle run test, and 20 m shuttle run test. Inhibitory control was assessed using the flanker task and reflected by reaction time and accuracy., Results: A total of 120 preschoolers were included in the final statistical analysis. After adjusting the confounders, HPFT was associated with reaction time (β=-2.49 ms, 95%CI: -4.22, -0.75). Similarly, a negative association was observed between one-leg balance and reaction time (β=-12.04 ms, 95%CI: -18.94, -5.15), and between 20 m shuttle run test and reaction time (β=-23.28 ms, 95%CI: -37.00, -9.56). Compared with the participants in the lowest tertile, HPFT (β=-158.74, 95%CI: -309.63, -7.84), one-leg balance (β=-267.25 ms, 95%CI: -420.71, -113.79) and 20 m shuttle run test (β=-215.58 ms, 95%CI: -374.67, -56.49) were all negatively associated with reaction time of those in the highest tertile., Conclusions: Negative relationships between HPFT and RT of the inhibitory control were observed in preschoolers. To have better inhibitory control, it's suggested that HPFT of preschoolers should be at least 249. These findings are of great significance for the early improvement of HPFT and the development of inhibitory control in preschool children., (© 2022. The Author(s).)
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- 2022
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292. The Association of Different Sedentary Patterns and Health-Related Physical Fitness in Pre-schoolers.
- Author
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Lu Y, Li Y, Zhou T, Sang M, Li L, Fang C, Hu W, and Quan M
- Abstract
Background: The results of sedentary time (ST) and health-related physical fitness (HPF) are not completely consistent and the studies concentrated on pre-schoolers are very limited. Methods: We measured ST and ST patterns (ST Bouts time, ST Breaks times) by accelerometer. The health-related physical fitness T-score (HPFT) was calculated by five indexes: height-weight standard score, 20 m shuttle-run test, grip strength, standing long jump and 2 × 10 m shuttle-run test. Results: We included 375 pre-schoolers (211 boys, 164 girls) in the final analysis. The total ST and ST Bouts times negatively correlated with HPFT in pre-schoolers. HPFT reduced by 1.69 and 0.70 points per 10 min increased in total ST and ST Bouts times, respectively. HPFT of the highest quartile group reduced by 9.85 points in total ST, and 10.54 points in ST Bouts time compared with the lowest quartile group. However, the HPFT increased by 0.09 points per 10 times increased in ST Breaks times; the HPFT increased by 16.21 and 15.59 points when moderate to vigorous physical activity (MVPA) replaced total ST and ST Bouts time. Conclusions: HPF negatively correlated with the Total ST and ST Bouts times, but positively correlated with ST Breaks times; and HPF significantly improved when MVPA replaced ST in pre-schoolers., Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest., (Copyright © 2022 Lu, Li, Zhou, Sang, Li, Fang, Hu and Quan.)
- Published
- 2022
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293. Effects of interrupting prolonged sitting on postprandial glycemia and insulin responses: A network meta-analysis.
- Author
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Quan M, Xun P, Wu H, Wang J, Cheng W, Cao M, Zhou T, Huang T, Gao Z, and Chen P
- Subjects
- Humans, Network Meta-Analysis, Postprandial Period, Randomized Controlled Trials as Topic, Blood Glucose metabolism, Exercise physiology, Insulin metabolism, Sedentary Behavior, Sitting Position
- Abstract
Purpose: This study aimed to evaluate the effectiveness of physical activity (PA) interrupting prolonged sitting (PS) on postprandial glycemia and insulin responses among adults., Methods: PubMed, EMBASE, Cochrane Library, Web of Science, CINAHL, PsycINFO, and the China National Knowledge Infrastructure databases were searched through September 30, 2020. Randomized controlled trials (RCTs) that examined the effect of all forms of PA interrupting PS on postprandial glycemia and/or insulin responses among adults without chronic diseases were included in this study. The risk of bias of included studies was evaluated based on the Cochrane tool. A network meta-analysis was performed to estimate the summary standardized mean differences (SMDs) with 95% confidence intervals (95%CIs) with random effects., Results: Thirty crossover RCTs were included in our review. These RCTs included 9 types of interventions that interrupted PS. When compared to PS by itself, light-intensity PA intermittent interrupting (LPA-INT) PS and moderate-intensity PA intermittent interrupting (MPA-INT) PS significantly lowered postprandial glycemia (SMD = -0.46, 95%CI: -0.70 to -0.21; SMD = -0.69, 95%CI: -1.00 to -0.37, respectively) and significantly reduced postprandial insulin response (SMD = -0.46, 95%CI: -0.66 to -0.26; SMD = -0.47, 95%CI: -0.77 to -0.17, respectively). Results of the clustered ranking plot indicated that MPA-INT was the most effective intervention in lowering postprandial glycemia and insulin responses., Conclusion: Replacing PS with MPA-INT or LPA-INT has a positive effect in reducing postprandial glycemia and insulin responses, with MPA-INT being the optimal intervention strategy., (Copyright © 2021. Production and hosting by Elsevier B.V.)
- Published
- 2021
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294. Distribution, diagnosis, and analysis of related risk factors of multidrug-resistant organism in patients with malignant neoplasms.
- Author
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Zhou T, Yang W, Yang Q, Xuan B, Zhang L, Li X, and Zhou F
- Abstract
Objective: In this study, we sought to investigate the distribution characteristics, early diagnosis, and related risk factors of multidrug-resistant organism (MDRO) in patients with malignant tumors., Methods: A total of 278 patients with malignant tumors and infections were selected in the Department of Oncology for retrospective study, including 128 MDRO patients and 150 non-MDRO patients. The markers of bacterial culture were detected, and the serum procalcitonin (PCT), C-reactive protein (CRP), and serum amyloid A (SAA) levels were measured in patients' blood samples. The diagnostic value of PCT, CRP, and SAA for MDRO was evaluated, the distribution of MDRO in different years and different infection sites was analyzed, and the related risk factors of MDRO infection were studied., Results: The PCT, CRP, and SAA in the MDRO group were significantly higher than those of the non-MDRO group (all P<0.001). The area under the curve of receiver operating characteristics for the diagnosis of MDRO by PCT, CRP, and SAA. The combination of the three was 0.792, 0.811, 0.755, and 0.842, respectively. The distribution of MDRO strains in different years was statistically different (P<0.05), as well as the distribution of MDRO in different infection sites (P<0.05). Multivariate regression analysis demonstrated that invasive operation, excessive bed rest, hypoproteinemia, PCT, and SAA were independent risk factors for MDRO infection in patients with malignant tumors (all P<0.05)., Conclusion: The combination of CRP, PCT, and SAA displays a value for early diagnosis of MDRO infection. MDRO infections in malignant tumors mainly include carbapenem-resistant Acinetobacter baumannii and carbapenem-resistant Escherichia coli. There are differences in terms of MDRO strains in different years and different infection sites, and there are many risk factors regarding MDRO infection in patients with malignant tumors. Intervention should be taken in order to reduce the rate of MDRO infection., Competing Interests: None., (IJCEP Copyright © 2020.)
- Published
- 2020
295. The effects of chronic physical activity interventions on executive functions in children aged 3-7 years: A meta-analysis.
- Author
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Li L, Zhang J, Cao M, Hu W, Zhou T, Huang T, Chen P, and Quan M
- Subjects
- Child, Child, Preschool, Humans, Executive Function physiology, Exercise physiology
- Abstract
Objectives: To use a quantitative approach to examine the effects of chronic physical activity (PA) interventions on executive functions (EFs) in children aged 3-7 years., Design: Systematic review and meta-analysis., Methods: PubMed, EMBASE, Cochrane Central Register of Controlled Trials, PsycINFO, and the China National Knowledge Infrastructure were searched from their inception to December 2019. Intervention studies with a control group that examined the effects of chronic PA interventions on EFs among children aged 3-7 years were included in this meta-analysis. Lastly, subgroup analyses were conducted to examine the potential modifying effects of chronic PA intervention's characteristics and study quality., Results: A total of 10 studies were included in this meta-analysis with a total of 716 participants. The fixed-effects model was used to estimate the pooled effect sizes since heterogeneity across included studies was not significant. The summary effects revealed that chronic PA interventions have a small but positive effects on participants' overall EFs [standardized mean difference (SMD) = 0.35, 95% CI: 0.20-0.50] as well as inhibition (SMD = 0.37, 95% CI: 0.12-0.62) and working memory (SMD = 0.24, 95% CI: 0.02-0.46) domains and a moderate effect on the cognitive flexibility domain (SMD = 0.66, 95% CI: 0.28-1.05). Lastly, the pooled effect was not significantly modified by intervention duration, session length, or frequency., Conclusions: Chronic PA interventions, especially PA plus cognitive challenges interventions, may be a promising way to promote the development of multiple aspects of EFs in children aged 3-7 years., (Copyright © 2020 Sports Medicine Australia. Published by Elsevier Ltd. All rights reserved.)
- Published
- 2020
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296. Neurobiological commonalities and distinctions among 3 major psychiatric disorders: a graph theoretical analysis of the structural connectome
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Wang S, Gong G, Zhong S, Duan J, Yin Z, Chang M, Wei S, Jiang X, Zhou Y, Tang Y, and Wang F
- Subjects
- Adolescent, Adult, Bipolar Disorder diagnostic imaging, Connectome, Depressive Disorder, Major diagnostic imaging, Echo-Planar Imaging methods, Female, Humans, Male, Middle Aged, Models, Theoretical, Nerve Net diagnostic imaging, Occipital Lobe diagnostic imaging, Schizophrenia diagnostic imaging, Somatosensory Cortex diagnostic imaging, White Matter diagnostic imaging, Young Adult, Bipolar Disorder pathology, Depressive Disorder, Major pathology, Diffusion Tensor Imaging methods, Image Processing, Computer-Assisted methods, Nerve Net pathology, Occipital Lobe pathology, Schizophrenia pathology, Somatosensory Cortex pathology, White Matter pathology
- Abstract
Background: White matter network alterations have increasingly been implicated in major depressive disorder, bipolar disorder and schizophrenia. The aim of this study was to identify shared and distinct white matter network alterations among the 3 disorders., Methods: We used analysis of covariance, with age and gender as covariates, to investigate white matter network alterations in 123 patients with schizophrenia, 123 with bipolar disorder, 124 with major depressive disorder and 209 healthy controls., Results: We found significant group differences in global network efficiency (F = 3.386, p = 0.018), nodal efficiency (F = 8.015, p < 0.001 corrected for false discovery rate [FDR]) and nodal degree (F = 5.971, pFDR < 0.001) in the left middle occipital gyrus, as well as nodal efficiency (F = 6.930, pFDR < 0.001) and nodal degree (F = 5.884, pFDR < 0.001) in the left postcentral gyrus. We found no significant alterations in patients with major depressive disorder. Post hoc analyses revealed that compared with healthy controls, patients in the schizophrenia and bipolar disorder groups showed decreased global network efficiency, nodal efficiency and nodal degree in the left middle occipital gyrus. Furthermore, patients in the schizophrenia group showed decreased nodal efficiency and nodal degree in the left postcentral gyrus compared with healthy controls., Limitations: Our findings could have been confounded in part by treatment differences., Conclusion: Our findings implicate graded white matter network alterations across the 3 disorders, enhancing our understanding of shared and distinct pathophysiological mechanisms across diagnoses and providing vital insights into neuroimaging-based methods for diagnosis and research., Competing Interests: None declared., (© 2020 Joule Inc. or its licensors)
- Published
- 2020
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297. Are preschool children active enough in Shanghai: an accelerometer-based cross-sectional study.
- Author
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Quan M, Zhang H, Zhang J, Zhou T, Zhang J, Zhao G, Fang H, Sun S, Wang R, and Chen P
- Subjects
- Accelerometry, Body Mass Index, Child, Child, Preschool, China, Cross-Sectional Studies, Female, Humans, Male, Sex Factors, Exercise, Physical Fitness
- Abstract
Objective: Engaging in physical activity (PA) plays an important role in promoting physical and mental health, but the PA data for Chinese preschool children are lacking. This study aims to objectively assess the PA levels of preschool children in Shanghai, China and to evaluate their PA levels relative to age-specific recommendations., Design, Setting and Participants: A cross-sectional study was conducted among preschool children in Shanghai, city of China. There were a total of 303 preschool children (boys, 174; girls, 129) recruited from eight kindergarten classes in the Yangpu and Baoshan Districts of Shanghai., Main Outcome Measures: Daily PA was assessed using ActiGraph GT3X
+ accelerometers for seven consecutive days. Children were required to have data from at least 2 weekdays and 1 weekend day, with a minimum daily wear time of 480 min to be included in the analysis., Results: Preschool children in Shanghai accumulated, on average, 70.9 min of moderate-to-vigorous PA (MVPA) and 168.0 min of total PA (TPA) per day (d). Boys engaged in more MVPA and TPA than girls (72.8 min/day vs 68.3 min/day and 171.9 min/day vs 162.9 min/day, respectively). Overall, 72.9% of the participants met the age-specific recommendations of MVPA, while 35.3% met TPA recommendations., Conclusions: Findings of this study warn of the insufficiency of PA in Shanghai preschool children, suggesting there is substantial room to improve their PA., Trial Registration Number: ChiCTR-OOC-15007439; Results., Competing Interests: Competing interests: None declared., (© Author(s) (or their employer(s)) 2019. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.)- Published
- 2019
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298. The compression of L5 nerve root, single or double sites?-radiographic graded signs, intra-operative detect technique and clinical outcomes.
- Author
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Wu AM, Zhang K, Li XL, Cheng XF, Zhou TJ, Du L, Chen C, Tian HJ, Sun XJ, Zhao CQ, Li YM, and Zhao J
- Abstract
Background: The L5 nerve root could be compressed at both L4-5 and L5-S1 regions. If L5 nerve root has confirmed compression at L4-5 level and questionable compression at L5-S1 foramina, performing both surgeries at L4-5 and L5-S1 levels may induce unnecessary extra surgery on L5-S1; however, ignoring foraminal stenosis of L5/S1 may require re-exploration., Methods: Two hundred seventeen patients with L5 nerve root compressed at L4-5 lateral access were performed with L4-5 decompression and interbody fusion. Lee et al. grade classification was used to assess the foraminal stenosis of L5-S1 preoperatively. Nerve root probe was designed and used to detect if there were foraminal stenosis at L5-S1 level that compressing the exiting L5 nerve root. Visual analog scale (VAS) of low back pain, leg pain and Oswestry Disability Index (ODI) were used to assess clinical outcomes., Results: For all of 217 patients who underwent L4-5 surgery, L5-S1 foramina were preoperatively assessed as: grade 0: 125 cases, grade 1: 58 cases, grade 2: 23 cases, and grade 3: 11 cases. After intra-operative L5 nerve root detection, 11/11 patients with grade 3 radiographic foraminal stenosis, 6/23 (26.1%) with grade 2 and 2/58 (3.4%) who had grade 1 underwent L4-5 and L5-S1 transforaminal lumbar interbody fusion (TLIF), the others received only L4-5 TLIF. Compared to pre-operative baseline data, both L4-5 TLIF and L4-5 and L5-S1 TLIF groups had significant decreased VAS of low back pain and leg pain, and ODI at 3 and 24 months after operation., Conclusions: We suggested that our novel nerve root probe combined with pre-operative radiographic grade may be helpful to surgeons to identify the single or double compression of L5 nerve root and make a more precise surgical strategy to improve surgical outcome than the method depended on pre-operative radiographic grade alone., Competing Interests: Conflicts of Interest: The authors have no conflicts of interest to declare.
- Published
- 2018
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299. The role of cage height on the flexibility and load sharing of lumbar spine after lumbar interbody fusion with unilateral and bilateral instrumentation: a biomechanical study.
- Author
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Du L, Sun XJ, Zhou TJ, Li YC, Chen C, Zhao CQ, Zhang K, and Zhao J
- Subjects
- Aged, Biomechanical Phenomena, Cadaver, Female, Humans, Intervertebral Disc Degeneration diagnostic imaging, Lumbar Vertebrae diagnostic imaging, Lumbar Vertebrae surgery, Male, Middle Aged, Prosthesis Design, Radiography, Range of Motion, Articular, Spinal Fusion methods, Weight-Bearing physiology, Intervertebral Disc Degeneration surgery, Lumbar Vertebrae physiology, Pedicle Screws, Prostheses and Implants, Spinal Fusion instrumentation
- Abstract
Background: One- and two-level lumbar interbody fusion with unilateral instrumentation is as effective as that with bilateral instrumentation. The height of the interbody cage influences the operated segment stability and the fusion technique success. The purpose of this research was to determine the effect of the fusion cage height (i.e. long and short) on both the stability (based on flexibility measures) and load sharing of the unilateral and bilateral instrumented transforaminal lumbar interbody fusion (TLIF) technique., Methods: The flexibility and load sharing tests were performed on seven human lumbar spines. Different configurations combining a long or short cage with a unilateral, bilateral, or no posterior fixation were used to stabilize the operated segment. Two sets of modular cages were designed for each type of test to simulate the long and short cages. During the flexibility test, a pure-moment load of 7.5 Nm was applied. The range of motion (ROM) was recorded for flexion-extension, lateral bending, and axial rotation. During the load sharing test, an axial-compression load of 400 N was applied. The load bearing of the cages was recorded using a cage-embedded load cell., Results: When the fusion cage height decreased 2 mm, the segment flexibility with unilateral fixation showed a significant increase in the ROM for flexion-extension, lateral bending, and axial rotation of 74.9, 83.8, and 175.2% (P < 0.01), respectively. In contrast, for bilateral fixation, the height decrease resulted in no significant change in ROM for flexion-extension (P = 0.686), lateral bending (P = 0.698), and axial rotation (P = 0.133). Using a short fusion cage, the load bearing decreased in 17.1, 21.5, and 54.1% (P < 0.05) for the cage alone, unilateral, and bilateral fixation, respectively., Conclusions: A cage longer than the intervertebral space should be chosen to increase the stability and intervertebral graft load borne when performing TLIF with unilateral instrumentation.
- Published
- 2017
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