Unravelling the role of the combined effect of metallic charge transfer channel and SiO_(x) overlayer in the Zr/Si-Fe_(2)O_(3):Au:SiO_(x) nanorod arrays to boost photoelectrochemical water splitting

Hematite(α-Fe_(2)O_(3)) based photoanodes have been extensively studied due to various intriguing features that make them viable candidates for a photoelectrochemical(PEC) water splitting photoanode.Herein,we propose a Zr-doped Fe_(2)O_(3) photoanode decorated with facilely spin-coated Au nanoparticles(NPs) and microwave-assisted attached Si co-doping in conjunction with a SiO_(x) overlayer that displayed a remarkable photocurrent density of 2.01 mA/cm^(2) at 1.23 V vs.RHE.The kinetic dynamics at the photoelectrode/-electrolyte interface was examined by employing systematic electrochemical investigations.The Au NPs played a dual role in increasing PEC water splitting.First,the Schottky interface that was formed between Au NPs and Zr-Fe_(2)O_(3) lectrode ensured the prevention of electron flow from the photoanode to the metal,increasing the number of available charges as well as suppressing surface charge recombination.Second,Au extracted photoholes from the bulk of the Zr-Fe_(2)O_(3) and transported them to the outer SiO_(x) overlayer,while the SiO_(x) overlayer efficiently collected the photoholes and promoted the hole injection into the electrolyte.Further,Si co-doping enhanced bulk conductivity by reducing bulk charge transfer resistance and improving charge carrier density.This study outlines a technique to design a metallic charge transfer path with an overlayer for solar energy conversion.

锂离子电容器直流内阻测试方法研究

直流内阻(简称"内阻")是衡量超级电容器性能最重要的电化学参数之一,但目前尚未有统一的测试方法用于锂离子电容器的内阻测试。本工作使用不同的充放电测试程序,采用不同的内阻计算方法来评测比较锂离子电容单体样品的内阻值。结果表明,不同的充放电测试方法、不同的放电截止电压、不同的内阻计算方法,影响锂离子电容器内阻测量值。以100 ms压降法计算的内阻可能接近放电开始阶段的稳态内阻,可以使用普通国产电池测试设备,简单、易行、可靠,经进一步的验证后,可以考虑推广使用。

Cr12MoV钢电火花辅助铣削实验研究

以典型难切削金属材料Cr12MoV模具钢为研究对象,使用ABAQUS对其在电火花放电条件下温度场进行数值模拟,在不同进给率下对其进行传统铣削和电火花辅助铣削对比试验。借助高速摄像机、扫描电镜和测力计等设备,对其切削力特征、表面形貌和刀具磨损进行了对比分析研究。结果表明,电火花辅助铣削的切削力比传统铣削降低28.57%~51.47%,表面粗糙度降低2/3。与传统铣削相比,电火花辅助铣削在降低切削力、提高表面质量和减少刀具磨损方面具有显著优势。

炭基锂离子电容器负极预嵌锂技术研究进展

锂离子电容器属于非对称型超级电容器,通常由电池型负极和电容型正极共同置于有机锂盐溶液中组装而成,兼具超级电容器的高功率特性和锂离子电池的高能量密度,在智能电网、轨道交通、新能源汽车等多个领域具有广阔的应用前景。炭材料由于来源广泛、价格低廉、性能稳定,是锂离子电容器的首选电极材料。因此,炭基锂离子电容器具有竞争性的产业化前景。负极预嵌锂技术对于炭基锂离子电容器的电化学性能具有决定性影响。本文从锂源引入位置的角度,系统回顾了锂离子电容器负极预嵌锂技术的进展情况,并就负极预嵌锂过程中的关键控制因素做了梳理,有助于全面了解负极预嵌锂技术的研究现状,为锂离子电容器的进一步发展提供科学参考。

Clinicopathological significance of altered Notch signaling in extrahepatic cholangiocarcinoma and gallbladder carcinoma

AIM:To investigate the role and clinicopathological significance of aberrant expression of Notch receptors and Delta-like ligand-4 (DLL4) in extrahepatic cholangiocarcinoma and gallbladder carcinoma.METHODS:One hundred and ten patients had surgically resected extrahepatic cholangiocarcinoma (CC) and gallbladder carcinoma specimens examined by immunohistochemistry of available paraffin blocks.Immunohistochemistry was performed using anti-Notch receptors 1-4 and anti-DLL4 antibodies.We scored the immunopositivity of Notch receptors and DLL4 expression by percentage of positive tumor cells with cytoplasmic expression and intensity of immunostaining.Coexistent nuclear localization was evaluated.Clinicopatho-logical parameters and survival data were compared with the expression of Notch receptors 1-4 and DLL4.RESULTS:Notch receptor proteins showed in the cytoplasm with or without nuclear expression in cancer cells,as well as showing weak cytoplasmic expression in non-neoplastic cells.By semiquantitative evaluation,positive immunostaining of Notch receptor 1 was detected in 96 cases (87.3%),Notch receptor 2 in 97 (88.2%),Notch receptor 3 in 97 (88.2%),Notch receptor 4 in 103 (93.6),and DLL4 in 84 (76.4%).In addition,coex- istent nuclear localization was noted [Notch receptor 1;18 cases (18.8%),Notch receptor 2;40 (41.2%),Notch receptor 3;32 (33.0%),Notch receptor 4;99 (96.1%),DLL4;48 (57.1%)].Notch receptor 1 expression was correlated with advanced tumor,node,metastasis (TNM) stage (P=0.043),Notch receptor 3 with advanced T stage (P=0.017),tendency to express in cases with nodal metastasis (P=0.065) and advanced TNM stage (P=0.052).DLL4 expression tended to be related to less histological differentiation (P=0.095).Coexistent nuclear localization of Notch receptor 3 was related to no nodal metastasis (P=0.027) and Notch receptor 4 with less histological differentiation (P=0.036),while DLL4 tended to be related inversely with T stage (P=0.053).Coexistent nuclear localization of DLL4 was related to poor survival (P=0.002).CONCLUSION:Aberrant expression of Notch receptors 1 and 3 play a role during cancer progression,and cytoplasmic nuclear coexistence of DLL4 expression correlates with poor survival in extrahepatic CC and gallbladder carcinoma.

计入箱体轴柔性的主减齿轮系统振动特性研究

主减齿轮系统是汽车变速器的重要传动部件,也是诱发箱体振动噪声的主要原因。为了准确预测内外动态激励下主减齿轮系统的振动特性,采用有限单元离散化建模方法,将箱体轴离散为轴段单元,建立其与输入、输出轴段单元、齿轮啮合单元和轴承单元耦合后的弯_扭_轴-摆全耦合动力学方程。模型综合考虑了箱体轴柔性、大重合度下斜齿轮时变啮合刚度以及静态传递误差激励的影响,并利用数值算法求解了系统的固有特性和振动响应特性。研究结果表明:计入箱体轴柔性后,系统的低阶固有频率略微降低,但增加了新的固有频率与振型;随着转速的增加,系统在主减齿轮啮合频率的1倍频和2倍频处出现了明显的阶次幅值,但其能量较小,当转速达到4900 r/min时,系统出现明显的共振响应;外界载荷的增大主要在非共振区导致振动幅值的增加;当选取不同的端面重合度与轴向重合度组合时,或在一定范围内增大轴向重合度时,可有效降低斜齿轮时变啮合刚度的波动,改善共振点附近的振动位移幅值。

快速热处理化学气相沉积法制备用于电子产品热管理的轻质柔性石墨烯

下一代电子产品的飞速发展对热管理提出了更高的要求。初始石墨烯的导热性是铜的13倍。本文通过快速热处理化学气相沉积(RTP-CVD)法制备了具有大sp^(2)结构域的单层、双层和多层石墨烯(SLG、BLG、FLG),进一步通过低浓度H_(2)还原制备了高导热石墨烯。在1000℃下生长25 min制备出SLG,利用拉曼光谱和透射电子显微镜(TEM)研究了石墨烯的品质。为了验证RTP-CVD法生成的石墨烯的散热能力,将其作为2TB固态硬盘的散热器,通过红外热成像仪进行了研究。结果证明,RTP-CVD生长的石墨烯用于消费电子产品的热管理测试时性能表现优异。SLG显示温度(最高)比商用铜散热器低5℃,SLG的散热能力比商用铜散热器快200倍左右。综上,利用RTP-CVD法制备的轻质的柔性石墨烯可以成为下一代5G设备和消费电子产品热管理的更好选择。

Effects of Annealing and Removal of the Water-Soluble Fraction of Dry-Milled Rice Flour on the Texture of Cooked Rice Noodles

Rice noodles were prepared using dry-milled rice flours, which were treated by annealing and removing the water-soluble fraction to improve the quality of noodles without using chemical additives. The combined treatment (TC) with annealing and water-soluble fraction removal decreased the cooking losses for Goamibyeo but not for Chenmaai and Milyang260, which had soft kernels and contained less damaged starch than the hard kernel rice after milling. TC significantly reduced the hardness and adhesiveness of cooked noodles, and increased the cohesiveness according to the texture profile analysis. A sensory evaluation detected an increase in mouth feel firmness and elasticity of cooked TC noodles. These results indicate that annealing at room temperature for 3 h followed by the removal of the water-soluble fraction is effective for reducing the cooking losses and improving the textural properties of noodles made from rice flour with high starch damage.

<i>In-Vivo</i>Management of Purple Blotch of Onion Caused by <i>Alternaria porri</i>(Ellis) Cif. through Fungicides

An experiment was carried out to study the outcome of environmental factors (Temperature, Relative Humidity, Rainfall) and management of the purple blotch disease of onion using five treatments (Rovral + Ridoil gold with 3,4,5,6 sprays and control). The Taherpuri variety was used during the 2015-2016 cropping seasons at BARI, Gazipur, Bangladesh. In the experiment, the purple blotch disease surfaced at the end of January 2016 and was severe in late February to March (PDI 76.12%) due to temperature and RH above 24°C and 95%, respectively. As for the chemical control, the PDI for the treatments ranged from 50.66% to 83.33%. Significantly higher stem height was recorded by T4 (68.06 cm), where six sprays of Rovral + Ridomil were applied. The minimum stem height was recorded in T5 (59.23 cm). The maximum stem number per hill was recorded in T4 (2.30) numerically but differed significantly with T5 (2.00), where fungicides were not applied. The maximum lesion area was measured in T5 (25.26 mm2). Regarding PDI (Percent disease index), there was a significant difference among the treatments. The PDI value on purple blotch of onion ranged from 34.00 to 83.33. The lowest PDI was assessed in T4 (34.00). Statistical analysis revealed that a significant decrease of PDI on purple blotch was recorded under treatments of T1, T2, T3, and T4 (39.20%, 45.60%, 49.59%, and 59.19%) on controlling the disease and giving the optimum yield but all of them significantly differed with T5 (83.33%) where no fungicides were sprayed.

水域土石方机械化施工和施工安全性

通用和专用施工机械用于水域土石方作业均由于工况条件复杂多变而常发生事故，本文依据一起大型通用挖掘机涉水作业中的滑陷事故及有关调查，分析水域土石方机械化施工中多发生事故的种类、原因，进行施工方法的比较，提出上述工况的特殊施工安全性和机械的安全性设计改进、选型和适用方法等。

Relevant Frequency of Multiple Infections with High- and Low-Risk HPV Genotypes among Mexican Women Attending a Tertiary Care Hospital

Aims: To assess the frequency and the main HPV genotypes circulating among a group of women attending at a third level Hospital in Mexico City. Methods: A cross-sectional and descriptive study was performed in a group of 143 female outpatients of the Gynecology and Obstetrics Service at the National Institute of Perinatology of Mexico. Cervical swabs were taken from participants and subjected to simultaneous detection/genotyping of HPV by Linear Array Genotyping Test (Roche Molecular Systems). Mann-Whitney U, median and/or Square Chi tests were used to compare socio-demographical features between HPV-infected and uninfected women. Results: A total of 66 women (46.2%) had HPV infection. Overall, 112 genotypes were detected either as single infections (45.5%) or multiple genotype infections (54.5%). The cumulated frequency of multiple infections with high-/low- and high-/high-risk HPV genotypes was 63.9 %. The most frequent high-risk genotypes were HPV52 HPV58 and HPV51, whereas the most frequent low-risk genotypes were HPV6, HPV53 and HPV84. Infected women were significantly younger and have less stable partner relationships than uninfected women (p < 0.05). Conclusion: A relevant frequency of mixed infections with high- and low-risk HPV genotypes, other than those considered most prevalent worldwide, was observed. Most circulating high-risk genotypes among the women of this study are not covered by commercial vaccine formulations.

国际化时代中的韩国钟表业

1.韩国钟表业的现实地位 (1)制造业 韩国的钟表业早在六十年代初开始,当时只有几家韩国公司开始从事从国外(主要是日本)进口零部件组装机械手表和时钟。不久通过引进日本的技术和商标建立起一套完整的生产线,部分使用国产零部件。在那时,日本的钟表业已具有七十年的历史,而且韩国钟表业的兴起大部分应归功于日本。

内镜下黏膜切除后的蜂窝织炎性胃炎

Phlegmonous gastritis, or acute suppurative gastritis, is a rare, life-threatening condition which is characterized by purulent necrosis and thickening of the gastric wall. A combination of gastrectomy and antibiotic therapy is an effective treatment. We report a rare case of phlegmonousgastritis occurring after endoscopic mucosal resection. The patient was treated initially with antibiotic therapy but eventually required surgery.

ACCUPOWER智能配电管理自动化系统

一、简介 ACCUPOWER实时、多任务、多功能智能配电管理自动化系统,是在瑞士DAE公司网络电力仪表系列产品的基础上,结合中国电力标准,为满足配电管理自动化的高速发展,真正符合配电管理自动化的实时性、多任务、多功能、高可靠性的要求,精心设计研制成功的新型系统.

Bee wax coated water-soluble fraction of bee venom improved altered glucose homeostasis in streptozotocin-induced diabetic rats

OBJECTIVE:To evaluate the anti-diabetic efficacy of orally administered bee wax coated water-soluble fraction of bee venom(BWCBVA)drug over orally administered bee wax(BW)and intraperitoneally administered whole bee venom(BV)in streptozotocin(STZ)-induced diabetic rats.METHODS:Diabetes induced by intraperitoneal administration of 60 mg/kg STZ was treated with BWCBVA,BW,and BV for 21 d.The biochemical,protein and histological changes,and physical characteristics of BWCBVA were then analyzed.RESULTS:The BWCBVA group shows significantly decreased blood glucose level as compared to the BW and intraperitoneally administered whole BV treated group.Moreover,BWCBVA significantly normalizes the serum biochemical parameters and increases the body weight.Also,administration of BWCBVA significantly reverses the altered liver expression of phosphatidylinositide 3-kinases-p85 and liver glucokinase.Histological analysis of the pancreas an increase in the islet cell numbers and decrease inβ-cell damage.Co-administering BWCBVA 0.25 mg/kg with nifedipine(6.8 mg/kg)and nicorandil(13.8 mg/kg)to the diabetic rats results in insulin secretion through enhanced calcium ion influx.High performance liquid chromatography and gas chromatography was performed to identify the pharmacologically important compounds present in BWCBVA.CONCLUSION:Our results indicate that BWCBVA,an orally administered colon specific drug delivery system,can be effective in treating diabetes mellitus.

LiNbO_3 Self-Aligned Ridge Waveguide with Dielectric Side Buffers

A simple fabrication method of self-aligned ridge waveguides with dielectric side buffers is demonstrated on +Z-cut LiNbO3. The ridge waveguide is fabricated by a combination of the annealed proton exchange process and the proton-exchanged wet etching technique.

Effects of TiC on the microstructure refinement and mechanical property enhancement of additive manufactured Inconel 625/TiC metal matrix composites fabricated with novel core-shell composite powder

The flexible product shape of additive manufacturing(AM)is attractive,but the process suffers from a lack of material property diversity due to a limited number of printable alloys and post-processing options.To overcome this problem,the AM of metal matrix composites(MMCs)is a highly suitable solution because the properties of MMC can be tailored using various reinforcements.Therefore,extensive research has been conducted on the AM of MMCs;however,the major huddle for this process has been the difficulties in preparing feedstock powder and operating the AM process.This study introduces an easily synthesizable core-shell composite powder,which was fabricated by a recently developed process called the SMART process.The core-shell powder has a novel morphology,consisting of a metal core and composite shell,distinguishing it from the powders used in conventional AM approaches.Inconel 625/TiCp composites were fabricated using the core-shell composite powder,with various fractions of TiCp up to 10 vol.%.Compared to additive-manufactured Inconel 625,the additive-manufactured MMCs showed enhanced strength with significantly fewer defects.The results of this study may accelerate the application of MMC fabricated by AM,which offers superior properties and reliability compared to casting and powder metallurgy due to the higher degree of dislocation density and reinforcement dispersion.

Synergetic analysis of springtime air pollution episodes over Gwangju,Korea

The characteristics of springtime aerosols,including their optical and microphysical properties,were analyzed for the months of March to May of 2009 in Gwangju（35.23°N,126.84°E）,Korea.A high Light Detection and Ranging（LIDAR）-derived aerosol depolarization ratio（δ） of 0.25 ± 0.04 was determined on dust particles during the observation period.The？ngstr？m exponent values of the 440–870 nm wavelength pair（？_（440–870）） and single-scattering albedo at 675 nm（Ω_（675）） measured by a CIMEL sun/sky radiometer were 0.77 ± 0.19 and 0.95 ±0.01,respectively.The elevated dust layers reached a maximum elevation of 4 km above sea level.Anthropogenic/smoke particles that originated from highly populated/industrialized regions could be distinguished by their relatively smaller particle size（？_（440–870） ranged between1.33 and 1.36） and higher light-absorbing（Ω_（675） of 0.92 ± 0.01） characteristics.These aerosols are mostly distributed at altitudes 〈 1.2 km.The root-mean-square deviation（RMSD） between the aerosol optical depth（AOD,τ） derived from LIDAR_（（τ_（LIDAR））） and from the CIMEL sun/sky radiometer_（（τ_（CIMEL））） varied with respect to the surface PM10 concentration.The RMSD between τ_（LIDAR） and τ_（CIMEL） was as low as 13% under lower PM_（10） concentration levels（〈 100 μg/m^3）.In contrast,the RMSD between τ_（LIDAR） and τ_（CIMEL） increased three times（~31%） under high surface PM_（10） concentration levels（〉100 μg/m^3）.These results suggest that the accuracy of τ_（LIDAR） is influenced by specific atmospheric conditions,regardless of its uncertainty.