Search

A series of “turn-on” type NIR materials are developed with two-stage superlarge redshifted absorption in the first and second NIR window under the stimulation of protonation for smart photothermal conversion.

Compared to traditional lignin, ethylenediamine-treated lignin shows remarkable bright fluorescence in aqueous solutions due to through space and through bond interactions.

Summary Artificial photosystems consisting of semiconductor quantum dots (QDs) and non-noble metal ions (e.g., Fe2+, Co2+, Ni2+) show intrinsic advantages in efficient and cost-effective hydrogen (H2) evolution. However, well-controlled integration of these metal ions into ultra-small QDs is a major challenge. Here, we present a two-step strategy to realize site- and spatial-selective integration of earth-abundant Fe2+ ions in CdSe QDs; i.e., CdSe QDs are modified with a thin and anisotropic ZnS shell, and partial Zn2+ ions are selectively substituted by Fe2+ via cation exchange. The anisotropic ZnS layer not only passivates CdSe core but also works as an ideal medium to intimately anchor Fe2+. The multifunctional CdSe/Zn1−xFexS QD exhibits extraordinary activity and stability toward H2 photogeneration. Specifically, more than 880 mL (∼39,300 μmol) H2 gas is produced from 6 mL of aqueous solution during a consecutive 172 h (>1 week) experiment, thus achieving a turnover number of >600,000 per QD.

Lignin was isolated from wheat straw via organosolv process and further transferred to monophenolic compounds via oxidative conversion. Wheat straw lignin (WSL) with purity at 91.4 wt% was acquired in the presence of heterogeneous and recyclable catalyst of Amberlyst‐45. WSL was characterized by infrared spectrometer (IR), nuclear magnetic resonance spectroscopy (NMR) including 1H NMR and 13C NMR spectra. The results showed that WSL possesses typical syringyl (S), guaiacyl (G), and p‐hydroxyphenyl (H) units, and it is mainly composed of S and G units. The product distribution was dependent on the composition of WSL. Derivatives from S and G units were found to be the main products. The oxidative conversion of WSL was performed by varying oxidant and catalyst. Both the formation of monophenolic compounds and aromatic aldehydes were enhanced by combining oxidants and catalysts. The composite catalyst composed of NaOH/NaAlO2 was effective for the oxidation of WSL in the presence of nitrobenzene and atmospheric pressure air. The total yield of monophenolic compounds reached up 18.1%, and yields at 6.3 and 5.7% for syringaldehyde and vanillin were achieved, respectively.

Positively charged cationic defects are the main source of defects in metal-halide perovskite solar cells. They determine the quasi-Fermi level of electrons under illumination and contribute to non-radiative recombination loss, causing an open-circuit voltage deficit. In addition, they act as ion migration pathways for halide hopping, thus deteriorating long-term stability. Herein, a nitrogen-donor crown ether as a positive defect passivator is developed, which demonstrates a soft Lewis base nature, a large donor number and a higher formation constant with positively charged cationic defects. Density functional theory calculation indicates that the electron-donating nitrogen atom dramatically increases the electron density of oxygen atoms, leading to a strong affinity with positively charged cationic defects (Pb2+ and Cs+). The electron trap density in perovskite is significantly reduced by 27 %, resulting in an increased build-in potential. By adding a small amount of nitrogen-donor crown ether to the precursor solution, the perovskite solar cells achieve an efficiency of 24.07 % with an open-circuit voltage of 1.174 V and a fill factor of 82.15 %. Moreover, the unencapsulated perovskite solar cells show a T80 lifetime of 510 h under continuous operation (1 sun equivalent illumination, maximum power point tracking condition, dry N2 atmosphere), and enhanced moisture and heat stability.

Background Hepatocellular carcinoma (HCC) is the sixth most common malignant tumor and second most common cause of tumor-related deaths worldwide. Activated platelets play a prominent role in tumor. Platelet distribution width (PDW) indicates platelets activation and is altered in malignancies. The aim of this study was to explore the prognostic value of PDW for overall survival (OS) in HCC patients. Methods We retrospectively reviewed 273 HCC patients at a single institution from 2010 to 2014. The relationship between PDW and clinicopathological characteristics was analyzed. Kaplan-Meier curves and multivariate Cox regression analyses were used to evaluate the relationship of PDW with OS. Results Low PDW levels were observed in 127 (46.5%) out of 273 patients. A significant correlation was found between PDW and liver cirrhosis. Median follow-up was 36 months, survival curves revealed that the patients with increased PDW had significantly shorter survival time than those with normal PDW (p= 0.001). Cox regression analysis demonstrated that PDW was an independent prognostic factor for overall survival (hazard ratio, 2.464; 95% confidence interval [CI], 1.402-4.330, p= 0.001). Conclusion PDW is significantly associated with OS in HCC. This result suggests activated platelet may affect clinical outcome and warrant continued investigation.

Background Platelets play a crucial role in breast cancer (BC) progression and metastases. Mean platelet volume (MPV) is an indicator of platelet activation. The aim of the present study was to assess whether there is a difference in MPV between patients with metastatic BC with liver metastases and those with BC without liver metastases. Methods Between January 2014 and December 2017, 211 metastatic BC patients with synchronous liver metastases and 215 BC patients without metastases were retrospectively analyzed. Patients' clinicopathological characteristics data were collected. Results MPV levels were reduced in patients with liver metastases compared with those in patients without liver metastases. There were significant differences in MPV levels according to liver metastases status both in premenopausal and in postmenopausal non-TNBC or non-HER2+ patients. Moreover, in postmenopausal HER2+ or TNBC patients, MPV levels were lower in patients with liver metastases compared with those in patients without liver metastases. In the group with non-liver metastasis, platelet distribution width was significantly associated with tumor N stage. In addition, the prevalence of BC liver metastases decreased as MPV quartiles increased. After adjusting for other risk factors, the odds ratios for liver metastases according to MPV quartiles were 1.000, 0.267 (0.134-0.530), 0.072 (0.034-0.152), and 0.137 (0.066-0.281), respectively. Conclusion MPV is reduced in BC patients with liver metastases compared with that in BC patients without metastases. Moreover, MPV is independently associated with the presence of liver metastases.

Convertible cellulose and lignin were simultaneously isolated from wheat straw using a two-stage process via simply varying temperature and H2SO4 concentration. At the first-stage, cellulose was obtained by pretreating wheat straw at lower temperature and acid concentration using an organosolv process. The purity, yield and recovery rate of cellulose reached 86.8 wt%, 55.2 and 92.8% at 150 °C with 1 wt% H2SO4. At the second stage, the residual liquid was further treated at higher temperature and acid concentration, giving 17.4% lignin yield with 86.6% recovery rate and 93.2 wt% purity at 180 °C with 1.5 wt% H2SO4. The conversion of the as-isolated cellulose and lignin into chemicals was further investigated. The total yield of 5-hydroxymethylfurfural and glucose derived from wheat straw cellulose reached 82.5%, and 18.3% yield of monophenolic compounds from lignin were obtained, respectively. These results indicated that the two-stage process was effective for obtaining high-quality cellulose and lignin from wheat straw. Both of them displayed excellent convertible property.

Lignin was isolated from wheat straw via organosolv process and further transferred to monophenolic compounds via oxidative conversion. Wheat straw lignin (WSL) with purity at 91.4 wt% was acquired in the presence of heterogeneous and recyclable catalyst of Amberlyst‐45. WSL was characterized by infrared spectrometer (IR), nuclear magnetic resonance spectroscopy (NMR) including 1H NMR and 13C NMR spectra. The results showed that WSL possesses typical syringyl (S), guaiacyl (G), and p‐hydroxyphenyl (H) units, and it is mainly composed of S and G units. The product distribution was dependent on the composition of WSL. Derivatives from S and G units were found to be the main products. The oxidative conversion of WSL was performed by varying oxidant and catalyst. Both the formation of monophenolic compounds and aromatic aldehydes were enhanced by combining oxidants and catalysts. The composite catalyst composed of NaOH/NaAlO2 was effective for the oxidation of WSL in the presence of nitrobenzene and atmospheric pressure air. The total yield of monophenolic compounds reached up 18.1%, and yields at 6.3 and 5.7% for syringaldehyde and vanillin were achieved, respectively., The oxidative conversion of lignin isolated from wheat straw into aromatic compounds was investigated. Wheat straw lignin with high purity at 91.4 wt% was first isolated via organosolv process in the presence of green and recyclable catalyst of Amberlyst‐45. The oxidative conversion of lignin was then performed using NaOH/NaAlO2 as composite catalyst, and the total yield of monophenolic compounds reached 18.1%.

The current study observed the percentage of peripheral blood (PB) CD4+CD25+ regulatory T cells (Tregs) and the influence of CD4+CD25+ Tregs on the proliferation of naïve CD4 T cells in patients with hyperthyroidism. Furthermore, preliminary discussions are presented on the action mechanism of CD4+CD25+ Tregs on hyperthyroidism attacks. The present study identified that compared with the percentage of PB CD4+CD25+ Tregs in healthy control subjects, no significant changes were observed in the percentage of PB CD4+CD25+ Tregs in patients with hyperthyroidism (P>0.05). For patients with hyperthyroidism, CD4+CD25+ Tregs exhibited significantly reduced inhibition of the proliferation of naïve CD4 T cells and decreased secretion capacity on the cytokines of CD4 T cells, compared with those of healthy control subjects (P0.05). In the patients with hyperthyroidism, following treatment, CD4+CD25+ Tregs exhibited significantly increased inhibition of the proliferation of naïve CD4 T cells and increased secretion capacity of CD4 T cell cytokines, compared with those of the patients with hyperthyroidism prior to treatment (P

In this paper, a detailed analysis of n-port VNA (vector network analyzer) measurement uncertainties due to non-ideal standards for MTRL (multiport Through-Reflect-Lines) calibration is presented. By using the concept of general node equations, the error correction equation is simplified by the matrix operation, thus a generalized formula for the deviations of the measured S-parameters with respect to the error terms is derived, which can be implemented in further analysis of multiport measurement uncertainties applying arbitrary calibration method based on 4n-term error model. The final expressions for the sensitivity coefficients of S-parameters with simple and clear form provide a deeper understanding of error propagation mechanisms.

Colloidal quantum dots (QDs) have demonstrated great promise in artificial photosynthesis. However, the ultrasmall size hinders its controllable and effective interaction with cocatalysts. To improve the poor interparticle electronic communication between free QD and cocatalyst, we design here a self-assembled architecture of nanoparticles, QDs and Pt nanoparticles, simply jointed together by molecular polyacrylate to greatly enhance the rate and efficiency of interfacial electron transfer (ET). The enhanced interparticle electronic communication is confirmed by femtosecond transient absorption spectroscopy and X-ray transient absorption. Taking advantage of the enhanced interparticle ET with a time scale of ∼65 ps, 5.0 mL of assembled CdSe/CdS QDs/cocatalysts solution produces 94 ± 1.5 mL (4183 ± 67 μmol) of molecular H2 in 8 h, giving rise to an internal quantum yield of ∼65% in the first 30 min and a total turnover number of >1.64 × 107 per Pt nanoparticle. This study demonstrates that self-assembly is...

Here we present a facile aqueous approach to synthesize heterostructured CdSe/CdS QDs with all-inorganic chalcogenide S2− ligands under mild conditions. High-resolution transmission electron microscopy (HRTEM), X-ray diffraction (XRD), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), and steady-state emission spectroscopy demonstrate that the heterostructured CdSe/CdS QDs with sulfur-rich surface composition are formed by heterogeneous nucleation of Cd2+ and S2− precursors on the CdSe QDs. After adsorption of small Ni(OH)2 clusters over the surface in situ, the CdSe/CdS–Ni(OH)2 photocatalyst enables H2 production efficiently with an internal quantum yield of 52% under visible light irradiation at 455 nm, up to an 8-fold increase of activity to that of spherical CdSe QDs–Ni(OH)2 under the same conditions. Femtosecond transient absorption spectroscopy, X-ray transient absorption (XTA) spectroscopy, steady-state and time-resolved emission spectroscopy show that the quasi-type-II band alignment in the CdSe/CdS heterostructure is responsible for the efficiency enhancement of light harvesting and surface/interfacial charge separation in solar energy conversion. The unprecedented results exemplify an easily accessible pattern of aqueous synthesis of all-inorganic heterostructured QDs for advanced photosynthetic H2 evolution.

Background Platelets play a crucial role in breast cancer (BC) progression and metastases. Mean platelet volume (MPV) is an indicator of platelet activation. The aim of the present study was to assess whether there is a difference in MPV between patients with metastatic BC with liver metastases and those with BC without liver metastases. Methods Between January 2014 and December 2017, 211 metastatic BC patients with synchronous liver metastases and 215 BC patients without metastases were retrospectively analyzed. Patients’ clinicopathological characteristics data were collected. Results MPV levels were reduced in patients with liver metastases compared with those in patients without liver metastases. There were significant differences in MPV levels according to liver metastases status both in premenopausal and in postmenopausal non-TNBC or non-HER2+ patients. Moreover, in postmenopausal HER2+ or TNBC patients, MPV levels were lower in patients with liver metastases compared with those in patients without liver metastases. In the group with non-liver metastasis, platelet distribution width was significantly associated with tumor N stage. In addition, the prevalence of BC liver metastases decreased as MPV quartiles increased. After adjusting for other risk factors, the odds ratios for liver metastases according to MPV quartiles were 1.000, 0.267 (0.134–0.530), 0.072 (0.034–0.152), and 0.137 (0.066–0.281), respectively. Conclusion MPV is reduced in BC patients with liver metastases compared with that in BC patients without metastases. Moreover, MPV is independently associated with the presence of liver metastases.

In this paper, a CPW-fed ultrawideband antenna with switchable notched stop bands is proposed. The antenna radiating patch which is embedded within a rectangular slot consisting of two parts: a slotted feed and a slotted octagonal patch. It has two slots to provide two switchable notched stop bands. The impedance bandwidth ranges from 3 GHz to 10.6 GHz. The modified fence-shaped slot is created in a radiating patch to create band-notched properties in the 5G WiFi band (5 GHz - 6 GHz). In the meanwhile, a meandering slot connection is created in the feed to obtain band-notched properties in the WiMAX band (3.3 GHz - 3.8 GHz). These two slots all can be switched on or off.

Background. The gut microbiota is involved in the occurrence and development of chronic liver diseases. Zonulin is considered a marker of intestinal permeability. The purpose of this study was to assess zonulin levels in patients with chronic hepatitis B (CHB), HBV-associated liver cirrhosis (LC), and HBV-associated hepatocellular carcinoma (HCC). Materials and Methods. The study population consisted of 90 HBV-associated HCC patients, 90 HBV-associated LC patients, 90 CHB patients, and 90 healthy subjects. Serum levels of zonulin and AFP were determined. The diagnostic accuracy of each marker was evaluated using receiver operating characteristic (ROC) curve analysis (AUC). Results. Serum zonulin levels were significantly higher in patients with HCC than in patients with LC or CHB or healthy subjects (p<0.001). Moreover, the zonulin levels were increased in the advanced stage of LC and HCC. ROC curve analysis revealed that serum zonulin could be used to differentiate CHB from cirrhosis. In addition, the combination of zonulin and AFP exhibited a significantly larger AUC compared with zonulin or AFP alone. Conclusions. Serum zonulin levels were significantly increased both in LC and in HCC and correlated with the advanced stage of LC and HCC. Moreover, the combination of zonulin and AFP confers significant benefit to diagnostic accuracy in differentiating LC from HCC.

The excited-state properties and chain conformations of a new low-bandgap copolymer based on benzo[1,2-b:4,5-b']dithiophene (BDT) and thieno[3,4-b]thiophene with meta-alkoxyphenyl-substituted side chains in solution were investigated comprehensively. Time-resolved spectroscopy suggested that the excited-state properties were sensitive to the conformations of the copolymer in solution. In addition, excited-state dynamics analyses revealed the photogeneration of triplet excited states by intersystem crossing (ISC) at a rate constant of ∼0.4×10(9) s(-1) as a result of direct meta-alkoxyphenyl connection to the donor unit BDT irrespective to the macromolecular conformations. According to El-Sayed's rule, the fast ISC herein is correlated with the change of orbital types between singlet and triplet excited states as also shown by quantum chemical calculations. Our studies may shed light on the structure-property relationships of photovoltaic materials.

The installation of heterojunctions on the surfaces of carbon nanotubes (CNTs) is an effective method for promoting the charge separation processes needed for CNT-based electronics and optoelectronics applications. Conjugated polymers are proven state-of-the-art candidates for modifying the surfaces of CNTs. However, all previous attempts to incorporate conjugated polymers to CNTs resulted in unordered interfaces. Herein we show that well-defined chains of regioregular poly(3-hexylthiophene) (P3HT) were successfully grown from the surfaces of multiwalled CNTs (MWNTs) using surface-initiated Kumada catalyst-transfer polycondensation. The polymerization was found to proceed in a controlled manner as chains of tunable lengths were prepared through variation of the initial monomer-to-initiator ratio. Moreover, it was determined that large-diameter MWNTs afforded highly ordered P3HT aggregates, which exhibited a markedly bathochromically shifted optical absorption due to a high grafting density induced planarization of the polymer chains. Using ultrafast spectroscopy, the heterojunctions formed between the MWNTs and P3HT were shown to effectively overcome the binding energy of excitons, leading to photoinduced electron transfer from P3HT to MWNTs. Finally, when used as prototype devices, the individual MWNT-g-P3HT core-shell structures exhibited excellent photoresponses under a low illumination density.

A pair of 9-arylidene-9H-fluorene and benzothiadiazole based, low-bandgap copolymers differing merely in the para or meta substitution of alkoxy groups to the arylidene linkages, i.e. p-PAFDTBT and m-PAFDTBT respectively, were comparatively investigated by using morphological characterization, ultrafast spectroscopy and quantum chemical calculations. Despite the subtle difference in the alkoxy substitution patterns, p-PAFDTBT molecules in photoactive films were shown to have a higher degree of crystallinity owing to the relatively less rotational torsion of the arylidene linkages. As a result, in either neat or fullerene-blended films, p-PAFDTBT compared to m-PAFDTBT gave rise to a substantially higher charge yield and much slower charge recombination. This work demonstrates that the alkoxy substitution pattern and the arylidene linkage are highly influencing on the morphology of the photoactive layers and thereby on the photovoltaic performance of the semiconducting copolymers.

To investigate the clinical effect of a novel disposable ring versus that of the suture device in circumcision for redundant prepuce and phimosis.We randomly assigned 470 male patients with redundant prepuce or phimosis to receive circumcision with a novel disposable ring (the DR group, n = 235) or the suture device (the SD group, n = 235) and compared the operation time, intraoperative blood loss, pain scores, wound healing time, and postoperative complications and penile appearance between the two groups of patients.All the operations were completed smoothly. Compared with the SD group, the DR group showed significantly shorter operation time (［7.49 ± 1.84］ vs ［3.83 ± 0.42］ min, P0. 05), less intraoperative blood loss (［3.34 ± 2.59］ vs ［2.41 ± 1.01］ ml, P0.05), lower intraoperative pain score (0.57 ± 0.76 vs 0.20 ± 0.47, P0.05) and 6-hour postoperative pain score (3.42 ± 1.12 vs 0.48 ± 0.94, P0.05), shorter wound healing time (［12.05 ± 2.80］ vs ［7.79 ± 1.65］ d, P0.05), lower incidence rates of postoperative glans congestion or edema (36.17% ［85/235］ vs 2.56% ［6/235］, P0.05), dysuria or strenuous urination (34.04% ［80/235］ vs 2.13% ［5/235］, P0.05) and bleeding or hematoma (5.11% ［12/235］ vs 1.28% ［3/235］, P0.05), and higher satisfaction with postoperative penile appearance (90.6% ［213/235］ vs 95.8% ［228/235］, P0.05). There were no statistically significant differences between the SD and DR groups in the pain scores at the sixth night after operation (1.31 ± 0.96 vs 1.34 ± 1.07, P0.05) or while the staples scraping the underpants or at the ring removal (3.49 ± 1.22 vs 3.36 ± 1.41, P0.05). No obvious postoperative infection or delayed healing was observed except for 3 cases of wound dehiscence (1 in the DR and 2 in the SD group) and 8 cases of delayed removal of the staples in the SD group.The novel disposable ring, with its advantages of short operation time, less bleeding and pain, good penile appearance, high safety, and simple operation, is obviously superior to the suture device in circumcision and deserves to be applied and popularized clinically. .目的： 比较新型包皮套扎器行包皮环切术与缝合器包皮环切术治疗包皮过长及包茎的临床效果。方法： 470例包皮环切术的患者随机分为两组，一次性使用包皮套扎器包皮环切术（套扎器组）和缝合器包皮环切术（缝合器组）各235例。分析和比较两组患者的手术时间、术中出血量、疼痛评分(视觉模拟评分法，VAS)、术后愈合时间、阴茎头充血水肿、排尿困难或者费力、术后明显出血及血肿、包皮裂开、延迟脱钉及愈合后外观满意度等。结果： 所有手术均顺利完成，套扎器组的手术时间（3.83±0.42）min 、术中出血量（2.41±1.01）ml、术中疼痛评分(0.20±0.47)分，术后6 h疼痛评分（0.48±0.94）分，术后包皮愈合时间（7.79±1.65) d，愈合后外观满意度95.8%（228/235），阴茎头充血水肿2.56%（6/235)，排尿困难费力2.13%（5/235)，术后明显出血及血肿1.28%（3/235）；缝合器组上述指标分别为(7.49±1.84) min、(3.34±2.59) ml 、（0.57±0.76）分、（3.42±1.12）分、（12.05±2.80）d、90.6%（213/235）、36.17%（85/235）、34.04%（80/235）、5.11%（12/235），以上9项指标两组均有显著差异 (P均0. 05)。术后第6天夜间疼痛评分套扎器组（1.34±1.07）分，缝合器组为（1.31±0.96）分；拆环时疼痛评分套扎器组（3.36±1.41）分，缝合器组脱钉前钉挂内裤时疼痛评分（3.49±1.22）分，两组差异均无统计学意义(P均0. 05)。两组均无术后明显感染及延迟愈合情况发生，包皮裂开套扎器组1例，缝合器组2例。缝合器组延迟脱钉者8(3.40%)例。 结论: 使用新型套扎器包皮环切术更加安全、省时、美观、患者痛苦小、护理更简单。.

To compare the clinical effect of a novel disposable circumcision device Ring with that of conventional circumcision in the treatment of redundant prepuce and phimosis.Totally, 750 patients with redundant prepuce or phimosis underwent Ring circumcision (group A, n = 450) or conventional circumcision (group B, n = 300). We recorded the operation time, intraoperative blood loss, Visual Analogue Scale (VAS) intraoperative pain scores, postoperative complications, wound healing time, and patients' satisfaction with postoperative penile appearance, followed by comparison of the collected data between the two groups of patients.All the operations were successfully completed. Group A, as compared with B, showed significantly shorter operation time (［3.78 ± 0.42］ vs ［26.24 ± 3.99］ min, P0.05), less intraoperative blood loss (［2.39 ± 1.01］ vs ［10.80 ± 3.57］ ml, P0.05), lower pain scores intraoperatively (0.14 ± 0.36 vs 2.30 ± 1.46, P0.05), 6 hours postoperatively (0.32 ± 0.78 vs 3.03 ± 1.56, P0.05) and at the ring removal (3.35 ± 1.42 vs 2.78 ± 1.43, P0.05), shorter wound healing time (［7.61 ± 1.60］ vs ［8.57 ± 1.37］ d, P0.05), higher satisfaction with postoperative penile appearance (97.8% ［440/450］ vs 86% ［258/300］, P0.05), and lower incidence of postoperative bleeding or hematoma (0.89% ［4/450］ vs 3% ［9/300］, P0.05). No statistically significant differences were observed between groups A and B in the nocturnal pain score before the ring removal (1.45±1.02 vs 1.38 ± 0.92, P0.05) or the postoperative incidence rate of edema (0.89% ［4/450］ vs 2.33% ［7/300］, P0.05). There were no significant postoperative infections or delayed incision healing except for 1 case of wound dehiscence in each group.Ring circumcision, with its advantages of shorter operation time, less blood loss and pain, higher safety, and better postoperative penile appearance, is easily accepted by the patients and deserves wide clinical application.目的： 比较新型包皮套扎器行包皮环切术与传统包皮环切术治疗包皮过长及包茎的临床效果及并发症。方法： 750例包皮环切术的患者分为两组，450例采用新型包皮套扎器包皮环切术（套扎器组），300例采用传统包皮环切术（传统组），分析和比较两组患者的手术时间、出血量、疼痛评分(视觉模拟评分法，VAS)、术后恢复时间和术后感染的发生率，及术后外观满意度等。结果： 所有手术均顺利完成，套扎器组的手术时间（3.78±0.42）min 、术中出血量（2.39±1.01）ml、术中疼痛评分(0.14±0.36)分，术后6 h疼痛评分为(0.32±0.78)分，拆环时疼痛评分(3.35±1.42)分，术后包皮完全愈合时间(7.61±1.60) d，愈合后外观满意度97.8%（440/450），术后出血及血肿0.89%(4/450)；传统手术组分别为(26.24±3.99) min, ( 10.80 ± 3.57) ml ,(2.30±1.46)分，(3.03±1.56)分， (2.43±1.67)分， (8.57±1.37) d，86%（258/300），3%（9/300）；以上8项指标均有统计学意义(P0.05)。套扎器组拆套扎器前夜间疼痛评分(1.45±1.02)分，拆环后包皮内板及系带处水肿0.89%（4/450），传统手术组分别为拆线前夜夜间疼痛评分(1.38±0.92)分，拆线后水肿2.33%（7/300），以上两项无统计学意义(P0. 05)。两组发生包皮裂开各1例，均无术后明显感染及延迟愈合情况发生。 结论: 新型包皮套扎器包皮环切术具有手术时间短, 术中术后出血少, 疼痛轻, 术后外观满意度高, 安全度高，受术者易于接受等优点，值得临床推广应用。.

The photosynthetic purple bacterium Thermochromatium (Tch.) tepidum is a thermophile that grows at an optimal temperature of ∼50 °C. We have investigated, by means of steady-state and time-resolved optical spectroscopies, the effects of temperature on the near-infrared light absorption and the excitation energy transfer (EET) dynamics of its light-harvesting complex 2 (LH2), for which the mesophilic counterpart of Rhodobacter (Rba.) sphaeroides 2.4.1 (∼30 °C) was examined in comparison. In a limited range around the physiological temperature (10-55 °C), the B800-to-B850 EET process of the Tch. tepidum LH2, but not the Rba. sphaeroides LH2, was found to be characteristically temperature-dependent, mainly because of a temperature-tunable spectral overlap. At 55 °C, the LH2 complex from Tch. tepidum maintained efficient near-infrared light harvesting and B800-to-B850 EET dynamics, whereas this EET process was disrupted in the case of Rba. sphaeroides 2.4.1 owing to the structural distortion of the LH2 complex. Our results reveal a remarkable thermal adaptability of the light-harvesting function of Tch. tepidum, which could enhance our understanding of the survival strategy of this thermophile in response to environmental challenges.

Novel wideband balanced bandpass filter with high selectivity and common-mode (CM) suppression is constructed with slotline resonator. When the intersection points of the microstrip feedline and slotline resonator are close to the midpoint of the slotline resonator, the coupling between the fundamental mode of the slotline resonator and microstrip feedline can be maximised, whereas the second mode can be suppressed. Making use of this feature, the third-order wideband filter with low insertion loss, wide upper-stopband and flat group delay is designed by using the slotline resonator and two quarter-wavelength microstrip resonators paralleled to the slotline resonator with tapped-line coupling at their short-circuited ends. Based on the third-order single-ended filter structure, a novel balanced filter with a 1 dB fractional bandwidth up to 72% is designed with low insertion loss and enhanced CM suppression. To improve the selectivity, the fifth-order wideband balanced filter with wide upper-stopband is designed with parallel coupling structure between two slotline resonators. The corresponding CM suppression is better than 42 dB within the whole differential mode passband. The wideband balanced filter is designed and fabricated, and good agreement between measurements and simulations is obtained.

The Accepted Manuscript version of this article (published on 6 June 2017) was withdrawn on 16 November 2017 at the request of the authors.

This paper presents a resistively and inductively loaded ultra-wideband monopole antenna with a top loaded disk. The proposed structure consists of a circular disk top load and the metal cylindrical arm. Lumped resistors and inductors are loaded. The ultra-wide bandwidth can be achieved by the resistive load. The disk top-load and inductive load enable this antenna have a small and compact size (about 1/15 wavelength at 20MHz). The proposed antenna has an ultra-wideband impedance bandwidth from 20MHz to 4GHz (S11

The Accepted Manuscript version of this article (published on 6 June 2017) was withdrawn on 16 November 2017 at the request of the authors.

In this letter, a novel high selectivity and common-mode (CM) suppression wideband balanced microstrip passband filter (BPF) is proposed using the short stub centrally loaded short-ended resonators (SSCLSR). The odd-mode resonant frequency of the SSCLSR can be flexibly controlled by the short stub, whereas the even-mode one is fixed. First, the wideband single-ended BPF are designed based on the microstrip SSCLSR with the parallel coupled microstrip line input/output (I/O). Two transmission zeros near the passband edges can be generated due to the main path signal counteraction and source-loaded coupling. Further, the CM equivalent half circuits of the balanced BPF based on the wideband single-ended BPF are investigated in detail. Thus, a wideband balanced BPF with high CM suppression within the passband is designed, fabricated, and measured. Good agreement between simulated and measured results is obtained. © 2014 Wiley Periodicals, Inc. Microwave Opt Technol Lett 56:2940–2944, 2014