15 results on '"LIU Yang-yang"'
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2. Sphingobacterium endophyticum sp. nov., a novel endophyte isolated from halophyte.
- Author
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Liu, Yang-Yang, Liu, Fang, Li, Yu-Qian, Lei, Rui-Feng, Ma, Qin, Narsing Rao, Manik Prabhu, Abudourousuli, Dilireba, Rouzi, Zulihumaer, Aosiman, Muyesaier, An, Deng-Di, and Li, Wen-Jun
- Subjects
- *
RIBOSOMAL RNA , *PHOSPHOLIPIDS , *GLYCOLIPIDS , *GENETIC code , *LIPIDS , *AMINO acid sequence - Abstract
A bacterial strain designated NYYP31T was isolated from the leaves of an annual halophytes, Suaeda corniculata Bunge, collected from the southern edge of the Gurbantunggut desert, north-west China. Strain NYYP31T was Gram-staining negative, strictly aerobic, rod-shaped, non-motile, and non-spore-forming. Growth was observed at 4–42 °C, at pH 5.0–10.0, in the presence of up to 8% (w/v) NaCl. Phylogenetic analysis based on 16S rRNA gene sequences and coding sequences of 92 protein clusters showed that strain NYYP31T should be assigned to the genus Sphingobacterium. 16S rRNA gene sequence similarity analysis showed that strain NYYP31T was most closely related to the type strain of Sphingobacterium daejeonense (97.9%) and Sphingobacterium lactis (97.7%). The predominant isoprenoid quinone was MK-7. The major fatty acids were identified as iso-C15:0, iso-C17:0 3-OH and summed feature 3 (C16:1ω7c and/or C16:1ω6c). The polar lipids were phosphatidylethanolamine, two unidentified phospholipids, three unidentified lipids, three unidentified amino phospholipids, and two unidentified glycolipids. The genomic DNA G + C content was 36.4 mol%. The average nucleotide identity (ANI) values for strain NYYP31T to the type strains of S. daejeonense and S. lactis were 77.9 and 74.1%, respectively, which were below the cut-off level (95–96%) for species delineation. Based on the above results, strain NYYP31T represents a novel species of the genus Sphingobacterium, for which the name Sphingobacterium endophyticum sp. nov. is proposed. The type strain is NYYP31T (= CGMCC 1.16979T = NBRC 114258T). [ABSTRACT FROM AUTHOR]
- Published
- 2020
- Full Text
- View/download PDF
3. Chemical Constituents and Anti-Inflammatory Effect of Incense Smoke from Agarwood Determined by GC-MS.
- Author
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Peng, De-Qian, Yu, Zhang-Xin, Wang, Can-Hong, Gong, Bao, Liu, Yang-Yang, and Wei, Jian-He
- Subjects
SMOKE ,AROMATIC compounds ,HIGH temperatures ,ODORS - Abstract
Agarwood is generally used to make incense sticks in China and Southeast Asia. It emits smoke with a pleasant odor when burned. There are few reports on the chemical components of smoke generated by burning or heating agarwood. The agarwoods were produced by the whole-tree agarwood-inducing technique (AWIT), agarwood induced by axe wounds (AAW), burning-chisel-drilling agarwood (BCDA), wood of Aquilaria sinensis trees (AS), respectively. Herein, we used GC-MS to analyze the chemical constituents of incense smoke generated from AWIT, AAW, BCDA, AS, and the extracts of sticks from agarwood produced by the whole-tree agarwood-inducing technique (EAWIT), and 484 compounds were identified. A total of 61 chemical constituents were shared among AWIT, AAW, and BCDA. The experimental data showed that aromatic compounds were the main chemical constituents in agarwood smoke and that some chromone derivatives could be cracked into low-molecular-weight aromatic compounds (LACs) at high temperature. Furthermore, agarwood incense smoke showed anti-inflammatory activities by inhibiting lipopolysaccharide- (LPS-) induced TNF-α and IL-1α release in RAW264.7 cells. [ABSTRACT FROM AUTHOR]
- Published
- 2020
- Full Text
- View/download PDF
4. Characterizing the spatial distribution of typical natural disaster vulnerability in China from 2010 to 2017.
- Author
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Wang, Qian, Zhang, Qi-peng, Liu, Yang-yang, Tong, Lin-jing, Zhang, Yan-zhen, Li, Xiao-yu, and Li, Jian-long
- Subjects
EMERGENCY management ,WINDSTORMS ,HAZARD mitigation ,DROUGHTS ,WATERSHEDS ,DROUGHT management - Abstract
Natural disaster vulnerability can intuitively reflect the susceptibility of an area to environmental changes. Better understanding the spatial distribution of natural disaster vulnerability is a critical process for taking effective adaptation and management. Although significant achievements have been made in disaster vulnerability, few studies are known about natural disaster vulnerability at the national scale, especially from the typical natural disaster events in China. In this study, with normalizing selected indicators and calculating vulnerability index, we analyzed the spatial distribution of natural disasters vulnerability during 2010–2017 using the geospatial techniques. The results showed that natural disaster vulnerability has certain spatial differences, but different natural disaster can occur in the same area during the study period. Drought disaster can occur in all regions of China, especially in Inner Mongolia. Flood disaster is mainly concentrated in the middle and lower reaches of the Yangtze River and the Yellow River Basin. The wind and storm disaster is chiefly in the northern regions in China. The freezing disaster is widely distributed in China. Furthermore, the regions with low vulnerability were primarily distributed in the eastern coastal region, indicating that the rapid development of economy and technology can resist or mitigate natural disaster to a certain extent. This study offers a solution to study natural disasters and provides scientific basis for disaster prevention and mitigation actions. [ABSTRACT FROM AUTHOR]
- Published
- 2020
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5. A new bis-γ-pyrone polypropionate from a marine pulmonate mollusc Onchidium struma.
- Author
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Chen, De-Li, Zheng, Wei, Feng, Jian, Ma, Guo-Xu, Liu, Yang-Yang, and Xu, Xu-Dong
- Subjects
ANTINEOPLASTIC agents ,BIOLOGICAL assay ,CELL lines ,CHROMATOGRAPHIC analysis ,DOSE-effect relationship in pharmacology ,HETEROCYCLIC compounds ,MARINE animals ,MOLECULAR structure ,MOLLUSKS ,NUCLEAR magnetic resonance spectroscopy ,SPECTROPHOTOMETERS ,SPECTRUM analysis ,CYTOTOXINS ,DESCRIPTIVE statistics - Abstract
A new bis-γ-pyrone polypropionate compound onchidione II (1), together with three known compounds, was isolated from a marine pulmonate mollusc Onchidium struma, collected at Hainan Island of China. The structure of new compound was determined by extensive spectroscopic analyses including IR, 1D and 2D NMR techniques, and chemical methods. Compounds 1–4 were evaluated for their cytotoxicity against human tumor cell lines HepG-2, A549, and MCF-2. The results showed that compounds 1 and 2 were moderate cytotoxic against HepG-2, A549, and MCF-2 cell lines, with IC
50 values from 13.2 to 22.4 μM. [ABSTRACT FROM AUTHOR]- Published
- 2019
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6. Functional and dysfunctional impulsivity and attempted suicide in rural China: A paired case-control study.
- Author
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Liu, Yang-Yang, Wang, Xin-Ting, Qiu, Hui-Min, Xu, Ai-Qiang, and Jia, Cun-Xian
- Subjects
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IMPULSE (Psychology) , *MENTAL illness , *SUICIDAL behavior , *CASE-control method - Abstract
This study aimed to clarify the relationship between functional and dysfunctional impulsivity and attempted suicide in rural China. Data of this study came from the investigation of 407 suicide attempters and their paired non-suicide attempters matched with the same gender, age (±3 years) and residence area in six counties in rural Shandong, China. Suicide attempters accounted for a lower proportion on high functional impulsivity, but a higher proportion on high dysfunctional impulsivity than non-suicide attempters. Dysfunctional impulsivity in the male denoted a significant risk factor for attempted suicide, even after adjustment for psychiatric disorder and demographic factors. Suicide attempters with high dysfunctional impulsivity had a higher percent of family suicide history than those with low dysfunctional impulsivity. High functional impulsivity was a significant protective factor for attempted suicide in the group aged 35–59 years, but a significant risk factor in the group aged 15–34 years. Suicide attempters with low functional impulsivity had poorer economic status and older age than those with high functional impulsivity. Our findings support the key roles of functional and dysfunctional impulsivity in attempted suicide among rural residents of China. [ABSTRACT FROM AUTHOR]
- Published
- 2017
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- View/download PDF
7. Fitness of three chemotypes of Fusarium graminearum species complex in major winter wheat-producing areas of China.
- Author
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Liu, Yang-yang, Sun, Han-yan, Li, Wei, Xia, Yun-lei, Deng, Yuan-yu, Zhang, Ai-xiang, and Chen, Huai-gu
- Subjects
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BIOLOGICAL fitness , *FUSARIUM , *WINTER wheat , *PLANT growth , *PATHOGENIC microorganisms - Abstract
In China, Fusarium head blight is caused mainly by the Fusarium graminearum species complex (FGSC), which produces trichothecene toxins. The FGSC is divided into three chemotypes: 3-acetyldeoxynivalenol (3-ADON), 15-acetyldeoxynivalenol (15-ADON), and nivalenol (NIV). In order to predict the geographical changes in the distribution of these chemotype populations in major winter wheat-producing areas in China, the biological characteristics of twenty randomly selected isolates from each of the three chemotypes were studied. No significant difference was exhibited in the growth rate of 3-ADON, 15-ADON, and NIV isolates at 15°C. At 20°C and 25°C, the growth rate of 15-ADON isolates was the highest. At 30°C, the growth rate of NIV and 3-ADON isolates was significantly higher than that of 15-ADON isolates. The 15-ADON isolates produced the highest quantities of perithecia and two to three days earlier than the other two populations at each temperature, and released more ascospores at 18°C. The aggressiveness test on wheat seedlings and ears indicated there was no significant difference between the 3-ADON and 15-ADON isolates. However, the aggressiveness of NIV isolates was significantly lower than that of the 3-ADON and 15-ADON isolates. The DON content in grains from heads inoculated with the 3-ADON isolates was higher than the content of 15-ADON and NIV isolates. The results showed that 15-ADON population had the advantage in perithecia formation and ascospore release, and the 3-ADON population produced more DON in wheat grains. We suggested that distribution of these three chemotype populations may be related to these biological characteristics. [ABSTRACT FROM AUTHOR]
- Published
- 2017
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8. Mental disorders and suicide attempt in rural China.
- Author
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Liu, Bao-Peng, Qin, Ping, Liu, Yang-Yang, Yuan, Lu, Gu, Ling-Xi, and Jia, Cun-Xian
- Subjects
- *
SUICIDE risk factors , *PATHOLOGICAL psychology , *MENTAL health , *SUICIDAL behavior treatment ,AGE factors in mental illness - Abstract
The prevalence of various mental disorders and their age and gender specific characteristics among suicide attempters remains unclear in rural China. This study using 1:1 paired case-control design included 409 suicide attempters and 409 paired controls matched on age, gender and place of residence. Mental disorders were assessed using the Structured Clinical Interview for DSM-IV-TR Axis I Disorders. The prevalence of mental disorders was 32.3% for suicide attempters and 4.9% for paired controls. Mental disorder constituted a significant risk factor for suicide attempt with an adjusted odds ratio of 7.16 (95%CI: 3.65–14.04). The prevalence of mental disorders was higher among male than female suicide attempters. Major depressive disorder was most common in female suicide attempters while alcohol use disorder was most common in the males. The prevalence of mental disorders seemed to increase with age. Suicide attempters of higher ages were more prone to have mood disorders, especially a major depression. Suicide attempters with mental disorders differed from those without mental disorders on a number of socio-economic characteristics and suicidal behavior features. These insights should be taken into account in strategies and efforts to improve mental health care and ultimately to reduce suicidal behavior among residents in rural China. [ABSTRACT FROM AUTHOR]
- Published
- 2018
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9. Pontibacter pamirensis sp. nov., isolated from saline-alkaline soil.
- Author
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Liu F, Liu YY, Li YQ, Lei RF, Ma Q, Abudourousuli D, Rouzi Z, Aosiman M, An DD, and Li WJ
- Subjects
- Alkalies, Bacterial Typing Techniques, Bacteroidetes isolation & purification, Base Composition, China, DNA, Bacterial genetics, Fatty Acids chemistry, RNA, Ribosomal, 16S genetics, Salinity, Sequence Analysis, DNA, Vitamin K 2 chemistry, Bacteroidetes classification, Phylogeny, Soil Microbiology
- Abstract
A novel bacterium, designated TRT317
T , was isolated from saline-alkaline soil collected from the Pamir plateau in northwest China. Cells of this strain were Gram-stain-negative, aerobic rods and red-pink-coloured. Phylogenetic analysis using 16S rRNA gene sequences indicated that strain TRT317T showed the highest sequence similarity to the type strains of Pontibacter diazotrophicus (96.3 %) and Pontibacter yuliensis (96.2 %). Growth was observed at 4-40 °C, pH 6.0-10.0 and in the presence of up to 7 % (w/v) NaCl. The major fatty acids were iso-C15 : 0 and summed feature 4 (iso-C17 : 1 I/anteiso-C17 : 1 B). The polar lipids included phosphatidylethanolamine, phosphatidylglycerol, diphosphatidylglycerol, one unidentified phospholipid, four unidentified glycolipids and five unidentified lipids. The whole-cell sugars of strain TRT317T were mannose, rhamnose, glucose, galactose, xylose, arabinose and four unidentified sugars. The sole respiratory quinone was MK-7. The genomic DNA G+C content of strain TRT317T was 47.7 mol%. The average nucleotide identity (ANI) value of strain TRT317T with P. diazotrophicus was 88.3 %, which is below the standard ANI threshold for species identification (95-96 %). Combined results of physiological, genotypic, phylogenetic and chemotaxonomic analyses demonstrated that strain TRT317T represents a novel species within the genus Pontibacter , for which the name Pontibacter pamirensis sp. nov. is proposed. The type strain is TRT317T (=CGMCC1.18690T =KCTC 82818T ).- Published
- 2022
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10. Sanguibacter suaedae sp. nov., isolated from the root of Suaeda aralocaspica in north-west PR China.
- Author
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Ma Q, Lei RF, Li YQ, Abudourousuli D, Rouzi Z, Aosiman M, Liu F, Liu YY, An DD, and Li WJ
- Subjects
- Actinobacteria isolation & purification, Bacterial Typing Techniques, Base Composition, China, DNA, Bacterial genetics, Fatty Acids chemistry, Glycolipids chemistry, Nucleic Acid Hybridization, Phospholipids chemistry, Plant Roots microbiology, RNA, Ribosomal, 16S genetics, Sequence Analysis, DNA, Vitamin K 2 analogs & derivatives, Vitamin K 2 chemistry, Actinobacteria classification, Chenopodiaceae microbiology, Desert Climate, Phylogeny
- Abstract
A bacterial strain, designated YZGR15
T , was isolated from the root of an annual halophyte Suaeda aralocaspica , collected from the southern edge of the Gurbantunggut desert, north-west PR China. Cells of the isolate were Gram-stain-positive, facultatively anaerobic, irregular rods. Growth occurred at 4-42 °C (optimum, 30-37 °C), at pH 6.0-9.0 (optimum, pH 7.0-7.5) and in the presence of 0-9 % (w/v) NaCl (optimum, 2-5 %). Phylogenetic analysis using 16S rRNA gene sequences indicated that strain YZGR15T showed the highest sequence similarity to Sanguibacter keddieii (98.27 %) , Sanguibacter antarcticus (98.20 %) and Sanguibacter inulinus (98.06 %). Results of genome analyses of strain YZGR15T indicated that the genome size was 3.16 Mb, with a genomic DNA G+C content of 71.9 mol%. Average nucleotide identity and digital DNA-DNA hybridization values between strain YZGR15T and three type strains were in the range of 76.5-77.8 % and 20.0-22.2 %, respectively. Analysis of the cellular component of strain YZGR15T revealed that the primary fatty acids were anteiso-C15 : 0 , C16 : 0 , C14 : 0 and iso-C16 : 0 and the polar lipids included diphosphatidylglycerol, phosphatidylglycerol, three unidentified phospholipids and two unidentified glycolipids. The cell-wall characteristic amino acids were glutamic acid, alanine and an unknown amino acid. The whole-cell sugars for the strain were mannose, ribose, rhamnose, glucose and an unidentified sugar. The predominant respiratory quinone was MK-9(H4 ). Based on the results of genomic, phylogenetic, phenotypic and chemotaxonomic analyses, strain YZGR15T represents a novel species of the genus Sanguibacter , for which the name Sanguibacter suaedae sp. nov. is proposed. The type strain is YZGR15T (=CGMCC 1.18691T =KCTC 49659T ).- Published
- 2021
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11. [Spatial-temporal dynamics of grassland NPP and its driving factors in the Loess Plateau, China].
- Author
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Liu YY, Wang Q, Yang Y, Gang CC, Zhang ZY, Tong LJ, and Li JL
- Subjects
- China, Climate Change, Human Activities, Grassland, Models, Theoretical
- Abstract
We estimated grassland NPP using CASA model in the Loess Plateau during 2000-2015 and further analyzed the spatiotemporal dynamics, stability and persistence of grassland NPP. The driving factors of grassland NPP were analyzed from four aspects, i.e., vegetation types, topographic factors, climate change, and human activities. The results showed that the average NPP was 202.93 g C·m
-2 ·a-1 . The grassland NPP showed an increasing trend with an average increase rate of 2.43 g C·m-2 ·a-1 . The distribution of NPP in grassland had obvious spatial heterogeneity, which was generally high in the south and low in the north. 91.2% of the total grassland area showed an increasing trend, mainly distributed in most areas of Shaanxi Province, Longdong and Longzhong areas of Gansu Province, and most parts of Qinghai Province. The regions with a stable growth condition of grassland NPP mainly located in the south of Ordos, northern Shaanxi, and Gansu. The future change trend of grassland NPP would be consistent with that of the past in most areas. The grassland NPP would continue to increase in most areas of Shaanxi Province, Longzhong and Longdong areas in Gansu Province. The average NPP of slope grassland was 703.37 g C·m-2 ·a-1 , while that of alpine and subalpine grassland was 57.28 g C·m-2 ·a-1 . The grassland NPP was higher in high altitude area and relative low in plain and hilly area. The increased precipitation promoted the increase of grassland NPP during the study period. Human activities such as improvement of overgrazing and returning cropland to grassland also played an important role in the increase of grassland NPP in the Loess Plateau.- Published
- 2019
- Full Text
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12. Clinical value of MLH1-negative circulating tumor cells in lung cancer patients.
- Author
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Liang JY, Yang QF, Zeng YL, Liu YY, Liu YT, Gu FF, Hu Y, Zhang K, Zhong H, and Liu L
- Subjects
- Adenocarcinoma blood, Adenocarcinoma mortality, Adenocarcinoma pathology, China, Cohort Studies, Female, Humans, Lung Neoplasms blood, Lung Neoplasms mortality, Male, Middle Aged, Predictive Value of Tests, Prognosis, Small Cell Lung Carcinoma blood, Small Cell Lung Carcinoma mortality, Small Cell Lung Carcinoma pathology, Survival Analysis, Biomarkers, Tumor blood, Lung Neoplasms pathology, MutL Protein Homolog 1 metabolism, Neoplastic Cells, Circulating metabolism
- Abstract
Circulating tumor cells (CTCs) serve as valuable biomarkers. However, MutL homolog 1 (MLH1)-negative CTCs and their clinical significance in lung cancer are nearly unknown.Here, bioinformatic analysis of MLH1 expression and its clinical significance was conducted using the Oncomine, Ualcan, and Kaplan-Meier plotter websites. Size-based isolation and RNA in situ hybridization assays were used to identify CTCs and evaluate MLH1 and mesenchymal marker expression in CTCs. MLH1 was downregulated in lung cancer patients. Patients with lower MLH1 expression levels had worse prognoses. In a cohort of 32 randomly selected patients with lung cancer, the patients with poorer treatment responses had more MLH1-negative CTCs. The total CTCs, MLH1-negative CTCs and mesenchymal markers-expressing CTCs levels were negatively correlated with prognosis in the lung cancer patients.Our data showed the clinical significance of MLH1 expression in lung cancer tissues. The characterization and numeration of CTCs based on the expression of MLH1 and mesenchymal markers may be a convenient approach for predicting treatment response and prognosis in lung cancer.
- Published
- 2019
- Full Text
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13. Informative priors on fetal fraction increase power of the noninvasive prenatal screen.
- Author
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Xu H, Wang S, Ma LL, Huang S, Liang L, Liu Q, Liu YY, Liu KD, Tan ZM, Ban H, Guan Y, and Lu Z
- Subjects
- Adult, China, Female, Fetus, High-Throughput Nucleotide Sequencing methods, Humans, Markov Chains, Pregnancy, Prenatal Care, Bayes Theorem, Prenatal Diagnosis methods, Sequence Analysis, DNA methods
- Abstract
Purpose: Noninvasive prenatal screening (NIPS) sequences a mixture of the maternal and fetal cell-free DNA. Fetal trisomy can be detected by examining chromosomal dosages estimated from sequencing reads. The traditional method uses the Z-test, which compares a subject against a set of euploid controls, where the information of fetal fraction is not fully utilized. Here we present a Bayesian method that leverages informative priors on the fetal fraction., Method: Our Bayesian method combines the Z-test likelihood and informative priors of the fetal fraction, which are learned from the sex chromosomes, to compute Bayes factors. Bayesian framework can account for nongenetic risk factors through the prior odds, and our method can report individual positive/negative predictive values., Results: Our Bayesian method has more power than the Z-test method. We analyzed 3,405 NIPS samples and spotted at least 9 (of 51) possible Z-test false positives., Conclusion: Bayesian NIPS is more powerful than the Z-test method, is able to account for nongenetic risk factors through prior odds, and can report individual positive/negative predictive values.
- Published
- 2018
- Full Text
- View/download PDF
14. [Historical records and modern studies on agarwood production method and overall agarwood production method].
- Author
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Huang JQ, Wei JH, Zhang Z, Yang Y, Liu YY, Meng H, Zhang XL, and Zhang JL
- Subjects
- China, Medicine, Chinese Traditional trends, Drugs, Chinese Herbal metabolism, Medicine, Chinese Traditional methods, Thymelaeaceae growth & development, Thymelaeaceae metabolism
- Abstract
Agarwood is a precious traditional Chinese medicine with the efficacy of promoting qi circulation and relieving pain, warming middle-jiao, controlling nausea and vomiting, governing inspiration and relieving asthma, therefore it is widely applied in the clinic. Meanwhile, agarwood is also a precious spice. Aquilaria sinensis is the only source of agarwood production in China. Under natural conditions, a healthy A. sinensis tree produces no agarwood. Only if being wounded or infected with fungus can it synthetize and accumulate agarwood. It takes a decade or even several decades to produce agarwood, thus natural agarwood can not meet market demands. The essay summarizes historical records of agarwood production method and modern agarwood production method, in order to provide basis and reference for large-scale production of agarwood.
- Published
- 2013
15. Students' perceptions of school climate and trait test anxiety.
- Author
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Liu YY
- Subjects
- Adolescent, China, Faculty, Female, Humans, Male, Reproducibility of Results, Schools, Sex Factors, Surveys and Questionnaires, Anxiety psychology, Interpersonal Relations, Social Perception, Students psychology
- Abstract
In a sample of 916 Chinese high school students, the relations among the students' perceptions of school climate and their trait test anxiety were examined. The results indicated that students' perceptions of teacher-student relationships and student-student relationships negatively predicted their trait test anxiety. Furthermore, girls had higher scores on trait test anxiety than boys.
- Published
- 2012
- Full Text
- View/download PDF
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