Accelerated Sequential Deposition Reaction via Crystal Orientation Engineering for Low-Temperature,High-Efficiency Carbon-Electrode CsPbBr_(3) Solar Cells

Low-temperature,ambient processing of high-quality CsPbBr_(3)films is demanded for scalable production of efficient,low-cost carbon-electrode perovskite solar cells(PSCs).Herein,we demonstrate a crystal orientation engineering strategy of PbBr_(2)precursor film to accelerate its reaction with CsBr precursor during two-step sequential deposition of CsPbBr_(3)films.Such a novel strategy is proceeded by adding CsBr species into PbBr_(2)precursor,which can tailor the preferred crystal orientation of PbBr_(2)film from[020]into[031],with CsBr additive staying in the film as CsPb_(2)Br_(5)phase.Theoretical calculations show that the reaction energy barrier of(031)planes of PbBr_(2)with CsBr is lower about 2.28 eV than that of(O2O)planes.Therefore,CsPbBr_(3)films with full coverage,high purity,high crystallinity,micro-sized grains can be obtained at a low temperature of 150℃.Carbon-electrode PSCs with these desired CsPbBr_(3)films yield the record-high efficiency of 10.27%coupled with excellent operation stability.Meanwhile,the 1 cm^(2)area one with the superior efficiency of 8.00%as well as the flexible one with the champion efficiency of 8.27%and excellent mechanical bending characteristics are also achieved.

Effects of orientation on the fatigue crack growth behaviors of the ZK60 magnesium alloy in air and PBS

Strong anisotropic corrosion and mechanical properties caused by specimen orientations greatly limit the applications of wrought magnesium alloys.To investigate the influences of specimen orientation,the corrosion tests and(corrosion)fatigue crack growth tests were conducted.The rolled and transverse surfaces of the materials show distinct corrosion rate differences in the stable corrosion stage,but the truth is the opposite for the initial stage of corrosion.In air,specimen orientations have a significant influence on the plastic deformation mechanisms near the crack tip,which results in different fatigue fracture surfaces and cracking paths.Compared with R-T specimens,N-T specimens show a slower fatigue crack growth(FCG)rate in air,which can be attributed to crack closure effects and deformation twinning near the crack tip.The corrosion environment will not significantly change the main plastic deformation mechanisms for the same type of specimen.However,the FCG rate in phosphate buffer saline(PBS)is one order of magnitude higher than that in air,which is caused by the combined effects of hydrogen-induced cracking and anodic dissolution.Owing to the similar corrosion rates at crack tips,the specimens with different orientations display close FCG rates in PBS.

Evaluation of New Graduate Nursing Orientation Program

The study site is a holistic patient-centered organization that has developed a 16-week long orientation program for new graduate nurses entering the hospital setting. The purpose of the program is for new graduate nurses to gain the confidence, competence, and critical thinking skills for providing safe patient care. The issue occurring within the organization is that there is an increasing rise in the number of turnover rates of new graduates leaving the hospital, thus making evaluating the program a necessity to problem-solving. There has been no evaluation of the program in the past five years to reveal why the increase in the recent turnover rates. The data collected during the interview process was coded and categorized into three main sections: organizational, substantive, and theoretical. The evaluator used an organizational category to investigate for board areas or issues within the problem attempting to be solved. The evaluator concluded from the results and findings that the issue, a poor preceptor-preceptee relationship was seen by all stakeholders involved. The literature presented concludes that continuous evaluation of orientation programs is crucial for the professional and personal growth of new graduate nurses in the hospital.

Effects of mesoclimate and microclimate variations mediated by high altitude and row orientation on sucrose metabolism and anthocyanin synthesis in grape berries

Climate change and extreme weather pose significant challenges to the traditional viticulture regions.Emerging high-altitude grape-producing regions with diverse orientations have shown great potential in coping with this challenge.Stable,high-quality wine grape production may be achieved by synchronizing the meso-and microclimate.To clarify the role of high altitude and row orientation in meso-and microclimate and the response of berries to it,we evaluated seven years(2012-2018)of climate data,two years of basic grape(Cabernet Sauvignon,Vitis vinifera L.)quality,and one-year microclimate from veraison to harvest.By comparing two locations(Sidon 2047 m,Sinon 2208 m)in Yunnan Province,China,we found that the average temperature has been stable at approximately 15℃ for seven years,with no extreme weather or,noticeable global warming.The light intensity(LI)in the north-south(NS)was more balanced than the east-west(EW)direction,and the east-west to the south(EW-S)canopy side was almost higher than the other sides.High LI was associated with high photosynthetically active radiation(PAR),ultraviolet(UV),and infrared(IR)light and vice versa.The north-south to the east(NS-E)and east-west to the north(EWN)sides were characterized by lower LI and higher UV and IR light,and higher total anthocyanin content.Most anthocyanin synthesis-related genes,for example,VvF3'H and VvF3'5'H,were highly expressed in NS-E from veraison to maturity.Perhaps UV and IR light induced their expression.This study provides new insights on the role of differently orientated rows in controlling grape quality due to varied light quality.The findings are globally significant,particularly in the context of climate change,and offer fresh insights into berry physiological responses and decision-making for the management of existing vineyards.

Alleviating the anisotropic microstructural change and boosting the lithium ions diffusion by grain orientation regulation for Ni-rich cathode materials

Generally,layered Ni-rich cathode materials exhibit the morphology of polycrystalline secondary sphere composed of numerous primary particles.While the arrangement of primary particles plays a very important role in the properties of Ni-rich cathodes.The disordered particle arrangement is harmful to the cyclic performance and structural stability,yet the fundamental understanding of disordered structure on the structural degradation behavior is unclarified.Herein,we have designed three kinds of LiNi_(0.83)Co_(0.06)Mn_(0.11)O_(2) cathode materials with different primary particle orientations by regulating the precursor coprecipitation process.Combining finite element simulation and in-situ characterization,the Li^(+)transport and structure evolution behaviors of different materials are unraveled.Specifically,the smooth Li^(+)diffusion minimizes the reaction heterogeneity,homogenizes the phase transition within grains,and mitigates the anisotropic microstructural change,thereby modulating the crack evolution behavior.Meanwhile,the optimized structure evolution ensures radial tight junctions of the primary particles,enabling enhanced Li^(+)diffusion during dynamic processes.Closed-loop bidirectional enhancement mechanism becomes critical for grain orientation regulation to stabilize the cyclic performance.This precursor engineering with particle orientation regulation provides the useful guidance for the structural design and feature enhancement of Ni-rich layered cathodes.

Laser-Constructing 3D Copper Current Collector with Crystalline Orientation Selectivity for Stable Lithium Metal Batteries

The practical application of lithium(Li)metal anodes in high-capacity batteries is impeded by the formation of hazardous Li dendrites.To address this challenge,this research presents a novel methodology that combines laser ablation and heat treatment to precisely induce controlled grain growth within laser-structured grooves on copper(Cu)current collectors.Specifically,this approach enhances the prevalence of Cu(100)facets within the grooves,effectively lowering the overpotential for Li nucleation and promoting preferential Li deposition.Unlike approaches that modify the entire surface of collectors,our work focuses on selectively enhancing lithiophilicity within the grooves to mitigate the formation of Li dendrites and exhibit exceptional performance metrics.The half-cell with these collectors maintains a remarkable Coulombic efficiency of 97.42%over 350 cycles at 1 mA cm^(−2).The symmetric cell can cycle stably for 1600 h at 0.5 mA cm^(−2).Furthermore,when integrated with LiFePO4 cathodes,the full-cell configuration demonstrates outstanding capacity retention of 92.39%after 400 cycles at a 1C discharge rate.This study introduces a novel technique for fabricating selective lithiophilic three-dimensional(3D)Cu current collectors,thereby enhancing the performance of Li metal batteries.The insights gained from this approach hold promise for enhancing the performance of all laser-processed 3D Cu current collectors by enabling precise lithiophilic modifications within complex structures.

An Expert System to Detect Political Arabic Articles Orientation Using CatBoost Classifier Boosted by Multi-Level Features

The number of blogs and other forms of opinionated online content has increased dramatically in recent years.Many fields,including academia and national security,place an emphasis on automated political article orientation detection.Political articles(especially in the Arab world)are different from other articles due to their subjectivity,in which the author’s beliefs and political affiliation might have a significant influence on a political article.With categories representing the main political ideologies,this problem may be thought of as a subset of the text categorization(classification).In general,the performance of machine learning models for text classification is sensitive to hyperparameter settings.Furthermore,the feature vector used to represent a document must capture,to some extent,the complex semantics of natural language.To this end,this paper presents an intelligent system to detect political Arabic article orientation that adapts the categorical boosting(CatBoost)method combined with a multi-level feature concept.Extracting features at multiple levels can enhance the model’s ability to discriminate between different classes or patterns.Each level may capture different aspects of the input data,contributing to a more comprehensive representation.CatBoost,a robust and efficient gradient-boosting algorithm,is utilized to effectively learn and predict the complex relationships between these features and the political orientation labels associated with the articles.A dataset of political Arabic texts collected from diverse sources,including postings and articles,is used to assess the suggested technique.Conservative,reform,and revolutionary are the three subcategories of these opinions.The results of this study demonstrate that compared to other frequently used machine learning models for text classification,the CatBoost method using multi-level features performs better with an accuracy of 98.14%.

Nonlinear Time History Analysis for the Different Column Orientations under Seismic Wave Synthetic Approach

The significant impact of earthquakes on human lives and the built environment underscores the extensive human and economic losses caused by structural collapses. Over the years, researchers have focused on improving seismic design to mitigate earthquake-induced damages and enhance structural performance. In this study, a specific reinforced concrete (RC) frame structure at Kyungpook National University, designed for educational purposes, is analyzed as a representative case. Utilizing SAP 2000, the research conducts a nonlinear time history analysis to assess the structural performance under seismic conditions. The primary objective is to evaluate the influence of different column section designs, while maintaining identical column section areas, on structural behavior. The study employs two distinct seismic waves from Abeno (ABN) and Takatori (TKT) for the analysis, comparing the structural performance under varying seismic conditions. Key aspects examined include displacement, base shear force, base moment, joint radians, and layer displacement angle. This research is anticipated to serve as a valuable reference for seismic restraint reinforcement work on RC buildings, enriching the methods used for evaluating structures through nonlinear time history analysis based on the synthetic seismic wave approach.

Integrating Virtual Reality and Energy Analysis with BIM to Optimize Window-to-Wall Ratio and Building’s Orientation for Age-in-Place Design at the Conceptual Stage

This study unfolds an innovative approach aiming to address the critical role of building design in global energy consumption, focusing on optimizing the Window-to-Wall Ratio (WWR), since buildings account for approximately 30% of total energy consumed worldwide. The greatest contributors to energy expenditure in buildings are internal artificial lighting and heating and cooling systems. The WWR, determined by the proportion of the building’s glazed area to its wall area, is a significant factor influencing energy efficiency and minimizing energy load. This study introduces the development of a semi-automated computer model designed to offer a real-time, interactive simulation environment, fostering improving communication and engagement between designers and owners. The said model serves to optimize both the WWR and building orientation to align with occupants’ needs and expectations, subsequently reducing annual energy consumption and enhancing the overall building energy performance. The integrated model incorporates Building Information Modeling (BIM), Virtual Reality (VR), and Energy Analysis tools deployed at the conceptual design stage, allowing for the amalgamation of owners’ inputs in the design process and facilitating the creation of more realistic and effective design strategies.

miR-100在人类癌症中的研究新进展

miR-100在人类多种癌症中表达严重失调,在细胞代谢、周期、迁移、上皮间质转化、分化等方面发挥着重要作用,其表达失调还与癌症的诊断与预后密切相关。近年来,关于miR-100的研究取得了一些新进展,本文将对miR-100在人类癌症中的研究新进展进行简要阐述。

一种改进Oriented RepPoints的遥感图像有向目标检测

为解决Oriented RepPoints算法在遥感图像有向目标检测中因遥感图像背景干扰信息较多和目标尺度大小不一所导致的检测精度不高、易漏检误检等问题,提出一种改进Oriented RepPoints的遥感图像有向目标检测方法MA-RPDet(Mixed Attention RepPoints Detector).首先,采用了PVTv2作为主干网络,该网络利用线性空间缩减自注意力机制提取出更具局部连续性的特征图,并保持与卷积运算类似的线性复杂度.其次,在特征融合阶段设计了串联性混合注意力模块,进一步强化了重要特征,促进了多尺度特征的高效交互.最后,引入平滑GIoU损失函数对模型学习策略进行优化,提高了检测精度.在两个遥感图像目标检测数据集DOTA和HRSC2016上的实验结果表明,所提方法的检测精度mAP分别达到了77.19%和90.3%,均高于其他对比算法,证明了本文方法的有效性.

使固态化学反应100%完成的方法

无溶液形成的固态化学反应具有“一旦发生,就必完全”的特质,但因为固体的非流动性,它常常会因严重的传质困难而有始无终。为了克服这个困难,作者提出了少溶剂固态化学反应(LSR)的概念,即通过使用少量的溶剂赋予固体流动性,使反应物固体部分溶解,再使用搅拌反应器解决其“三传”问题,使之完全反应,从而达到使一些化学工业过程绿色化的目的。本文用平衡热力学数值计算的方法图解了几种代表性LSR的Gibbs自由能随反应进度的关系,进而指出:LSR的中间阶段如同没有溶液形成的固态化学反应,两端像溶液化学反应,因此,LSR虽继承了混合自由能导致的化学平衡,但其平衡点比溶液化学反应更接近100%完全。特别地,在LSR即将结束时,通过逐步移除溶剂以使反应物和产物固体持续存在而延长中段,能推动反应达到100%完全;对于连串反应,LSR仍有可能通过控制反应物的物质的量之比来获得中间产物;对于Δ_rG_m~?略小于零的反应,可以通过使用较多的溶剂跨越可能的早期平衡态,或者使用大量的产物固体“种子”使所有的产物一直与其饱和溶液平衡,最终通过逐渐蒸发溶剂推动反应进行到底;LSR的反应速度与反应物或产物的溶解度关系不大,但与反应物的溶解速度、化学反应速度和产物的结晶速度紧密相关。本文还讨论了使一些竞争反应、非自发反应进行到底的方法,获得高度的反应控制能力。

miR-100-5p对甲状腺癌细胞增殖与凋亡调控作用的实验研究

目的通过实验探讨微小核糖核酸(microRNA,miR)-100-5p在甲状腺癌细胞中的表达情况及其对细胞增殖与凋亡的调控作用。方法使用荧光定量PCR检测miR-100-5p在甲状腺癌细胞系(TPC-1,KTC-1)与甲状腺正常细胞系(Nthy-ori3-1)中的相对表达情况。TPC-1细胞分别转染miR-100-5p模拟物(miR-100-5p mimic)、抑制物(miR-100-5p inhibitor)及相应阴性对照(miR-mimic NC,miR-inhibitor NC)后,用CCK-8检测TPC-1细胞增殖情况,流式细胞仪检测TPC-1细胞凋亡情况。通过miRTarBase和TargetScan7.2数据库对miR-100-5p的靶基因进行预测和功能富集分析,用蛋白印迹实验与双荧光素酶报告基因实验验证miR-100-5p对成纤维细胞生长因子受体3(fibroblast growth factor receptor 3,FGFR3)的靶向调控作用。结果与Nthy-ori3-1细胞相比,miR-100-5p在TPC-1细胞中表达水平(1.87±0.03 vs 1.00±0.03)与KTC-1细胞中表达水平(6.33±0.47 vs 1.00±0.03)均上调,差异具有统计学意义(t=-34.220,-19.588,均P<0.05)。转染miR-100-5p mimic组在24,48,72h细胞450nm吸光度(A_(450nm))均高于miR-mimic NC组,差异具有统计学意义(t=-7.516,-17.828,-8.445,均P<0.05);转染miR-100-5p inhibitor组在24,48,72h A_(450nm)均低于miR-inhibitor NC组,差异具有统计学意义(t=6.720,6.782,6.073,均P<0.05)。与miR-mimic NC组相比,转染miR-100-5p mimic后凋亡率(7.43%±0.49%vs 10.55%±0.80%)下降(t=5.767,P=0.004),与miR-inhibitor NC组相比,转染miR-100-5p inhibitor后凋亡率(3.19%±0.22%vs 2.64%±0.15%)上升(t=-3.606,P=0.023),差异均有统计学意义。蛋白印迹实验显示,与miR-mimic NC组相比,FGFR3在miR-100-5p mimic组蛋白表达水平(0.78±0.12 vs 1.00±0.00)下调(t=3.071,P=0.037),与miR-inhibitor NC组相比,FGFR3在miR-100-5p inhibitor组蛋白表达水平(1.17±0.07 vs 1.00±0.00)上升(t=-4.509,P=0.046),差异均有统计学意义。与miR-mimic NC相比,miR-100-5p mimic没有降低FGFR33’UTR野生型组荧光素酶活性(1.01±0.17 vs 1.00±0.00)与突变型组荧光素酶活性(0.99±0.11 vs 1.00±0.00),差异无统计学意义(t=-0.057,0.181,P=0.96,0.873)。结论miR-100-5p在甲状腺癌细胞中表达上调,可促进甲状腺癌细胞增殖、抑制细胞凋亡,其可能成为甲状腺癌诊疗中新的生物标志物与调控靶点。

生产100号道路沥青影响因素分析及应对措施

某公司溶剂脱沥青装置利用重油浆和脱油沥青调合法生产道路沥青。在装置进料性质发生改变后,调合100号道路沥青时经常出现产品不合格的情况,严重影响了脱油沥青和重油浆的生产后路,不利于装置的安全平稳生产。基于生产现状,深入分析了影响100号道路沥青调合的因素,包括重油浆小于350℃含量、脱油沥青软化点、重油浆和脱油沥青调合比例等。研究得出快速生产100号道路沥青的方法:在保证脱油沥青性质、进罐量稳定的基础上,按照“宁重勿轻”的原则进行一次调合;结合一次调合的针入度结果,按比例加入重油浆进行二次调合。该方法有效提高了100号道路沥青的产量,为同类装置利用调合法生产100号道路沥青提供了借鉴。

血清S100A11、S100A14、CA125与ⅡB~Ⅳ期上皮性卵巢癌患者减瘤术结局的关系及其预测价值分析

目的 探讨ⅡB~Ⅳ期上皮性卵巢癌(EOC)患者血清S100钙结合蛋白A(S100A)11、S100A14和糖类抗原125(CA125)水平与肿瘤细胞减灭术(简称减瘤术)结局的关系及其预测价值。方法 选取2018年6月至2021年6月于该院接受初始减瘤术的ⅡB~Ⅳ期的124例EOC患者作为EOC组及70例卵巢良性病变患者作为病例对照组,并选取同期于该院体检的体检健康者70例作为健康对照组。检测各组血清S100A11、S100A14、CA125水平。根据EOC患者减瘤术结局是否满意,分为满意组(70例)和不满意组(54例)。分析ⅡB~Ⅳ期EOC患者减瘤术结局不满意的影响因素,并评估血清S100A11、S100A14、CA125预测ⅡB~Ⅳ期EOC患者减瘤术结局不满意的临床价值。结果 EOC组血清S100A11、S100A14、CA125水平高于病例对照组及健康对照组,差异有统计学意义(P<0.05)。不满意组美国麻醉医师协会(ASA)分级Ⅲ级、腹水、国际妇产科联盟(FIGO)分期ⅢC~Ⅳ期比例及血清CA125、S100A11、S100A14水平均高于满意组,差异有统计学意义(P<0.05)。FIGO分期ⅢC~Ⅳ期及血清CA125、S100A11、S100A14水平升高是影响EOC患者减瘤术结局不满意的独立危险因素(P<0.05)。血清CA125、S100A11、S100A14及三者联合预测EOC患者减瘤术结局不满意的曲线下面积(95%CI)分别为0.727(0.521~0.910)、0.747(0.507~0.961)、0.755(0.553~0.954)、0.825(0.743~0.913),三者联合检测预测减瘤术结局不满意的价值优于血清CA125、S100A11、S100A14单独检测。结论 ⅡB~Ⅳ期EOC患者血清S100A11、S100A14、CA125水平升高,与减瘤术结局不满意有关,血清CA125、S100A11、S100A14联合检测对减瘤术结局不满意具有较高的预测价值。

外周血CTC、PD-L1及S100A6BP水平对胃癌患者诊断及预后价值

目的 探讨外周血循环肿瘤细胞(CTC)、程序性死亡因子配体-1(PD-L1)、及钙周期素结合蛋白(S100A6BP)水平对胃癌患者诊断及预后价值研究。方法 选取2020年5月至2022年5月南阳市第一人民医院收治的182例胃癌患者为观察组,根据预后情况分为预后良好组(124例)及预后不良组(58例),选取同期90名健康志愿者作为对照组。比较所有受试者外周血CTC、PD-L1、S100A6BP水平,评估CTC、PD-L1、S100A6BP单独及联合检测在胃癌患者诊断及预后中的应用价值。结果 观察组外周血CTC、PD-L1及S100A6BP水平均高于对照组,差异有统计学意义(P<0.05);CTC、PD-L1及S100A6BP三者联合检测对胃癌患者诊断灵敏度、特异度均较单一检测高(P<0.05);预后良好者肿瘤直径、CTC、PD-L1、S100A6BP、TNM(Ⅲ~Ⅳ)、中高分化、淋巴结转移、浸润深度(T3-T4)均较预后不良组低,差异有统计学意义(P<0.05),TNM(Ⅰ~Ⅱ)、低度分化、浸润深度(T1-T2)水平较预后不良组高,差异有统计学意义(P<0.05);多因素Logistic回归分析显示,肿瘤直径、TNM分期、分化程度、浸润深度、淋巴结转移、CTC、PD-L1、S100A6BP是影响胃癌预后不良的独立危险因素(P<0.05);ROC曲线分析显示,CTC、PD-L1、S100A6BP单一及联合检测预测胃癌患者预后AUC分别为0.808、0.845、0.874、0.955(P<0.05)。结论 CTC、PD-L1、S100A6BP在胃癌患者外周血中呈高表达,与患者病理特征及预后有密切关系,三者联合检测对胃癌患者诊断及预后具有较高的预测价值。

老年急性轻型缺血性脑卒中患者血清S100β蛋白、Aβ42表达水平与脑卒中后认知功能障碍的关系

目的 探讨老年急性轻型缺血性脑卒中(MIS)患者血清S100β蛋白、β-淀粉样蛋白(Aβ)42表达水平与脑卒中后认知功能障碍(PSCI)的相关性。方法 老年MIS患者91例按脑卒中3个月蒙特利尔认知评估(MoCA)量表评分分为PSCI组(MoCA评分<26分)39例与非PSCI组52例(MoCA评分≥26分)。比较两组入院时血清S100β蛋白、Aβ42水平,应用Logistic回归模型确定PSIC的独立影响因素,采用Pearson相关分析检验PSCI组血清S100β蛋白、Aβ42水平与MoCA评分的相关性,并应用受试者工作特征(ROC)曲线对S100β蛋白、Aβ42水平预测PSCI的能力进行评价。结果 相比非PSCI组,PSCI组年龄较大,糖化血红蛋白(HbA1c)水平较高,且血清S100β蛋白、Aβ42水平较高,差异有统计学意义(P<0.05)。多因素Logistic回归分析得出,年龄(OR=1.335)、血清S100β蛋白水平(OR=1.581)、血清Aβ42水平(OR=1.644)为PSCI的危险因素(P<0.05)。ROC曲线分析显示,入院时血清S100β蛋白、Aβ42水平预测PSCI的AUC分别为0.832、0.886,二者联合的AUC为0.944,相比单一指标均显著提高(P<0.05)。结论 血清S100β蛋白、Aβ42表达水平与老年MIS患者PSCI发生密切相关,二者联合可较好预测PSCI的发生。

谷氨酸、CRP及S-100β蛋白水平与脑出血患者预后的关系

目的:分析谷氨酸、C反应蛋白(CRP)及S-100β蛋白水平与脑出血患者预后的关系。方法:选择2021年1月—2023年12月南昌大学第四附属医院收治的80例脑出血患者,患者入院后采集血样,测定血清谷氨酸、CRP及S-100β蛋白水平。随访90 d,采用格拉斯哥预后量表(GPS)进行预后评价,根据GPS评分分为预后不良组(1~3分)、预后良好组(4~5分),比较两组谷氨酸、CRP及S-100β蛋白水平,分析谷氨酸、CRP及S-100β蛋白水平与预后的相关性,采用受试者操作特征(ROC)曲线分析这些生物标志物对患者预后预测的价值。结果:在80例脑出血患者中,预后不良发生率为43.75%(35/80)。预后不良组血清谷氨酸、CRP及S-100β蛋白水平均高于预后良好组(P<0.05)。点二列相关系数分析结果显示,谷氨酸、CRP及S-100β蛋白与预后呈正相关(r=0.709、0.764、0.654,P<0.05)。Pearson相关系数分析显示,谷氨酸、CRP与S-100β蛋白呈正相关(r=0.361、0.431,P<0.001)。ROC曲线显示,谷氨酸、CRP、S-100β蛋白对患者预后预测的AUC分别为0.912、0.945、0.881,有一定预测价值。结论:谷氨酸、CRP及S-100β蛋白水平与脑出血患者的预后呈正相关,并具有一定的预测价值,在评估脑出血患者的预后时,这些可作为重要的参考指标之一。

miR29c下调S100A4蛋白表达参与人胃癌细胞增殖促进凋亡

目的探讨miR-29c对人胃腺癌细胞增殖、凋亡的影响及其与转移相关蛋白S100A4的关系。方法采用细胞培养人胃癌细胞系BGC-823、SGC-7901和人正常胃粘膜上皮GES-1细胞,应用qRT-PCR检测各株细胞miR29c的表达。用hsamiR29c-mimics类似物(miR29c组),hsa-miR29c-inhibitor(阴性对照组)分别转染BGC-823细胞,空白对照组加入转染液,用CCK8及MTT法检测细胞增殖,流式细胞术检测细胞凋亡,Western blot检测S100A4相关肿瘤相关蛋白的表达。结果与正常胃粘膜上皮细胞GES-1表达率(1.131±0.069)相比,MiR-29c在胃癌细胞BGC823(0.254±0.025),SGC-7901(0.466±0.057)(F=57.5,P<0.05)。BGC823细胞转染miR29c模拟物后MiR-29c的表达量为:4.126±0.231,0.405±0.174,0.557±0.102,差异具有统计学意义(F=850.1,P<0.05)。转染24h、48h、72h后,MiR-29c组细胞的OD450值分别为:1.074±0.127、1.609±0.178、2.008±0.104;阴性对照组为:0.419±0.169、0.477±0.092、0.738±0.153,空白对照组为:0.830±0.305。其中,转染48h、72h后,MiR-29c组明显高于对照组(F=59.46,P<0.05)。细胞转染24h后,miR29c组细胞凋亡率分别是(6.900±0.414)%、(4.490±0.316)%、(3.850±0.243)%,,阴性对照组凋亡率分别是(10.830±0.231)%、(11.940±0.279)%、(13.530±0.941)%,空白对照组凋亡率分别是:(10.190±0.188)%、(11.76±0.569)%、(13.260±0.987),(P<0.001).各组S100A4蛋白的表达分别为0.770±0.028、1.109±0.083、1.024±0.042,(P=0.0021)。结论miR29c在胃癌细胞系中表达降低,通过抑制S100A4抑制人胃癌细胞增殖并促进胃癌细胞凋亡。

颅脑术后继发颅内感染患者脑脊液膜联蛋白A2和S100钙结合蛋白A10表达水平及临床意义

目的探讨颅脑术后继发颅内感染患者脑脊液膜联蛋白A2(Annexin A2)和S100钙结合蛋白A10(S100A10)表达水平及临床意义。方法选取收治的颅脑术后继发颅内感染患者120例为试验组,选取同期颅脑术后未感染的120例患者为对照组。采用酶联免疫吸附测定(ELISA)检测脑脊液中Annexin A2、S100A10水平;采用Pearson相关分析法分析Annexin A2、S100A10与各临床指标的相关性;采用Logistic回归分析法分析颅脑术后继发颅内感染的影响因素;采用受试者工作特征(ROC)曲线分析Annexin A2、S100A10水平对颅脑术后继发颅内感染的预测价值。结果试验组的糖尿病占比、脑脊液渗漏占比、血乳酸脱氢酶(LDH)、脑脊液中Annexin A2及S100A10水平高于对照组,差异有统计学意义(P<0.05)。颅内感染患者脑脊液中Annexin A2与S100A10、血LDH水平呈正相关,S100A10水平与LDH水平呈正相关(P<0.05)。多因素Logistic回归分析显示,糖尿病、脑脊液渗漏、血LDH、脑脊液中Annexin A2和S100A10均是颅脑术后继发颅内感染的独立影响因素(P<0.05)。ROC曲线显示,脑脊液中Annexin A2、S100A10水平单独预测及二者联合预测颅脑术后继发颅内感染的曲线下面积(AUC)分别为0.788、0.768、0.865,其中联合预测AUC大于二者单独预测(P<0.05)。结论颅脑术后继发颅内感染患者脑脊液中Annexin A2、S100A10表达水平升高,是颅脑术后继发颅内感染的独立影响因素,二者联合预测价值较高。