Effect of TRPV1 combined with lidocaine on cell state and apoptosis of U87-MG glioma cell lines

Objective:To study the effects of Transient receptor potential cation channel,subfamily V,member 1(TRPV1) combined with lidocaine on status and apoptosis of U87-MG glioma cell line,and explore whether local anesthetic produces neurotoxicity by TRPVI.Methods:U87-MG cells were divided into control group,gene silencing group,empty vector group and TRPV gene up-rcgulation group.For cells in each group,flow cytometry was employed to detect the intracellular calcium ion concentration and mitochondrial membrane potential at different lime point from cellular perspective.Cell apoptosis of U87-MG was assayed by flow cytometry and MTT from a holistic perspective.Results:Calcium ion concentration increased along with time.The concentration in TRPV1 gene up-regulation group was significantly higher than those in other groups at each time point(P<0.05).After adding lidocaine.mitochondrial membrane potential in U87-MG significantly increased(P<0.05).This increasing trend in TRPV1 gene up-regulation group was more significant than other groups(P<0.05).while in TRPV1 gene silencing group,the trend significantly decreased(P<0.05).Flow cytometry result and MTT result both showed that cell apoptosis in each group significantly increased after lidocaine was added(P<0.05).This increasing trend in TRPV1 gene up-regulation group was more significant than other groups(P<0.05),while in TRPV1 gene silencing group,the trend significandy decreased(P<0.05).Moreover,apoptosis was more severe along with the increasing concentration of lidocaine(P<0.05).Conclusions:In this study,it was proved that lidocaine could dose-dependently induce the increase of intracellular calcium ion concentration,mitochondrial membrane potential and apoptosis in U87-MG glioma cell line.The up-regulation of TRPV1 enhanced cytotoxicity of lidocaine,which revealed the correlations between mem.Lidocaine might have increased intracellular calcium ion concentration by activating TRPVI gene and induced apoptosis of U87-GM glioma cell line by up-regulating mitochondrial membrane potential.

An increment of diversity method for cell state trajectory inference of time-series scRNA-seq data

The increasing emergence of the time-series single-cell RNA sequencing(scRNA-seq)data,inferring developmental trajectory by connecting transcriptome similar cell states(i.e.,cell types or clusters)has become a major challenge.Most existing computational methods are designed for individual cells and do not take into account the available time series information.We present IDTI based on the Increment of Diversity for Trajectory Inference,which combines time series information and the minimum increment of diversity method to infer cell state trajectory of time-series scRNA-seq data.We apply IDTI to simulated and three real diverse tissue development datasets,and compare it with six other commonly used trajectory inference methods in terms of topology similarity and branching accuracy.The results have shown that the IDTI method accurately constructs the cell state trajectory without the requirement of starting cells.In the performance test,we further demonstrate that IDTI has the advantages of high accuracy and strong robustness.

1.3 GHz 9-cell高性能超导腔高阶模耦合器电磁及热分析研究

中国科学院高能物理研究所于2023年6月完成了高品质因数1.3 GHz超导加速模组研发,在国际上率先实现了中温退火高品质因数超导腔模组技术路线。模组中集成了八只经过中温退火工艺处理的1.3 GHz9-cell超导腔,在模组的测试过程中超导腔的高阶模耦合器温升异常,导致超导腔无法在高梯度下稳定工作。通过HFSS软件和CST软件中的微波仿真模块对高阶模耦合器进行电磁分析,再通过理论和Ansys Workbench软件对高阶模耦合器进行热仿真分析,并结合模组的高功率实验,找到了超导腔性能异常的原因,并对超导腔高阶模耦合器的冷却方式进行了进一步的优化,解决了模组中超导腔高梯度下的不稳定性。

A Dye-sensitized Nanocrystalline Solid State Photovoltaic Cell

A new type of dye-sensitized nanocrystalline solid state photovoltaic cell based on the wide band gap n-TiO2/p-CuI heterojunction was fabricated. Tetra-carboxyphenyl porphyrine (TPP-(COOH)(4)), squarylium cyanine derivative (SQ-(CH2),(SO3Py+)-Py-.) and ruthenium bipyridyl complex (RuL2(NCS)(2)) were used as photosensitizers. Larger photocurrents and photovoltages were shown in the cell sensitized by ruthenium bipyridyl complex and can be further increased by intercalation of a TiO2 thin underlayer.

ONE-CELL-STATE METHOD FOR DETERMINATION OF ELECTRONIC STRUCTURE OF INTERMETALLIC COMPOUNDS

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Prevalence of Glucose-6-Phosphate Dehydrogenase Deficiency among Steady-State Sickle Cell Disease Children at University of Ilorin Teaching Hospital, Ilorin

Background: Both glucose-6-phosphate dehydrogenase (G6PD) deficiency and sickle cell disease (SCD) are prevalent in malaria-endemic regions. Controversy however persists as to whether G6PD deficiency is commoner in SCD subjects compared with the general population. Co-existence of the enzyme-deficient state with a chronic haemolytic disorder, like SCD, could potentially predispose to fatal haemolytic episodes. There is however a dearth of paediatric studies on this subject. Aims and Objectives: To determine the prevalence and demographic determinants of G6PD deficiency in children with SCD. Methods: Red cell G6PD activity was determined in 115 steady-state sickle cell disease children aged 0.5 - 17 years, in steady state and equal number of age & gender-matched non-SCD controls using the quantitative method. A measured G6PD activity of U/gHb defined G6PD deficiency while values ≥6.97 U/gHb were regarded as normal. Data were analysed using SPSS version 20. Statistical analyses done include chi-square, student t-test and ANOVA. For all statistical analyses, p values less than 0.05 were considered significant. Results: There were 64 (55.7%) males and 51 (44.3%) females in each of the arms of the study. The mean age of the study population was 8.4 ± 4.7 years. Seven of the subjects were G6PD-deficient giving a prevalence of 6.1% which was not significantly different from the 7.0% obtained in the controls (p = 0.789). G6PD deficiency was more frequently encountered in the older age groups although the difference was not statistically significant (p = 0.438). Similarly, mean G6PD activity was highest in the under-5 age-group compared to the older age-groups analysed (p = 0.573). The condition was also commoner in the males than females although the difference did not attain statistical significance (p = 0.897). Conclusions: The prevalence of G6PD deficiency among SCD children was 6.1%. The condition is marginally commoner in males and older children.

Influence of defect states on the performances of planar tin halide perovskite solar cells

Although tin halide perovskite has shown excellent photoelectric performance, its efficiency of solar cell is low compared with that of lead halide. In order to enhance the efficiency of tin halide perovskite solar cell, a deep understanding of the role of the defects in the perovskite absorption layer and at the electron transport layer(ETL)/absorber or absorber/hole transport layer(HTL) interface is very necessary. In this work, the planar heterojunction-based CH_3NH_3SnI_3 perovskite solar cells were simulated with the SCAPS-1D program. Simulation results revealed a great dependence of device efficiency on defect density and interface quality of the perovskite absorber. The defect density at the front interface is critical for high efficiency, and the polarity of the interface charge has a different impact on the device efficiency. Strikingly, an efficiency over 29% was obtained under the moderate simulation conditions.

Influence of interface states, conduction band offset, and front contact on the performance of a-SiC：H(n)/c-Si(p)heterojunction solar cells

P-type silicon heterojunction（SHJ） solar cells with a-SiC：H（n） emitters were studied by numerical computer simulation in this paper. The influence of interface states, conduction band offset, and front contact on the performance of a-SiC：H（n）/c-Si（p） SHJ solar cells was investigated systematically. It is shown that the open circuit voltage（Voc） and fill factor（F F） are very sensitive to these parameters. In addition, by analyzing equilibrium energy band diagram and electric field distribution, the influence mechanisms that interface states, conduction band offset, and front contact impact on the carrier transport, interface recombination and cell performance were studied in detail. Finally, the optimum parameters for the a-SiC：H（n）/c-Si（p） SHJ solar cells were provided. By employing these optimum parameters, the efficiency of SHJ solar cell based on p-type c-Si was significantly improved.

200-nm long TiO_2 nanorod arrays for efficient solid-state Pb S quantum dot-sensitized solar cellsR

To ensure the infiltration of spiro-OMeTAD into the quantum dot-sensitized photoanode and to consider the limit of the hole diffusion length in the spiro-OMeTAD layer, a rutile TiO2 nanorod array with a length of 200 nm, a diameter of 20 nm and an areal density of 720 ram 2 was successfully prepared using a hydrothermal method with an aqueous-grown solution of 38 mM titanium isopropoxide and 6 M hydrochloric acid at 170 ℃ for 75 min. PbS quantum dots were deposited by a spin coating-assisted successive ionic layer adsorption and reaction （spin-SILAR）, and all solid-state PbS quantum dot-sensitized TiO2 nanorod array solar cells were fabricated using spiro-OMeTAD as electrolytes. The results revealed that the average crystal size of PbS quantum dots was -78 nm using Pb（NO3）2 as the lead source and remain unchanged with the increase of the number of spin-SILAR cycles. The all solid-state PbS quantum dot-sensitized TiO2 nanorod array solar cells with spin-SILAR cycle numbers of 20, 30 and 40 achieved the photoelectric conversion efficiencies of 3.74%, 4.12% and 3.11%, respectively, under AM 1.5 G illumination （100 mW/cm2）.

Cell Evolutionary Algorithm: a New Optimization Method on Ground-State Energy of the Atomic

The purpose of this paper is to present a new general approach to solve ground-state energies of the double-electron systems in a uniform magnetic field, in which the basic element of evolution is the set in the solution space, rather than the point. The paper defines the Cell Evolutionary Algorithm, which implements such a view of the evolution mechanism. First, the optimal set in which the optimal solution may be obtained. Then this approach applies the embedded search method to get the optimal solution. We tested this approach on the atomic structure, and the results show that it can improve not only the efficiency but also the accuracy of the calculations as it relates to this specific problem.

T细胞亚群水平可预测主动脉夹层患者入院30天生存状态

目的:探究主动脉夹层患者T细胞亚群水平与30 d生存状态的关系。方法:收集184例接受手术治疗的主动脉夹层患者的临床资料,根据入院30 d生存状态分为生存组(149例)和死亡组(35例),比较2组T细胞亚群(CD3^(+)、CD3^(+)CD4^(+)、CD3^(+)CD8^(+))水平。采用多元Logistic回归分析患者入院30 d死亡的影响因素,受试者工作特征曲线分析CD3^(+)、CD3^(+)CD4^(+)、CD3^(+)CD8^(+)T细胞的预测价值。结果:184例主动脉夹层患者入院30 d内全因死亡35例(19.02%)。死亡组Stanford A型、低氧血症、高血压患者占比、入院收缩压及舒张压、CD3^(+)CD8^(+)T细胞水平高于生存组,CD3^(+)与CD3^(+)CD4^(+)T细胞水平低于生存组(P均<0.05)。Logistic回归分析结果显示,CD3^(+)CD8^(+)T细胞、Stanford A型、低氧血症、高血压是主动脉夹层患者入院30 d死亡的危险因素,CD3^(+)、CD3^(+)CD4^(+)T细胞是其保护性因素(P均<0.05)。CD3^(+)与CD3^(+)CD4^(+)、CD3^(+)CD8^(+)T细胞预测主动脉夹层患者入院30 d死亡的曲线下面积分别为0.731(95%CI 0.644~0.819)、0.801(95%CI 0.726~0.875)、0.824(95%CI 0.731~0.918)。结论:主动脉夹层患者T细胞亚群CD3^(+)、CD3^(+)CD4^(+)、CD3^(+)CD8^(+)水平与入院30 d生存状态相关,三者与Stanford A型、低氧血症、高血压共同影响患者入院30 d生存状态。

综合性优质护理在造血干细胞移植治疗SAA患者中的应用

目的探讨综合性优质护理在行造血干细胞移植治疗的重型再生障碍性贫血(SAA)患者中的应用效果。方法前瞻性选取2019年1月至2023年1月郑州大学第一附属医院收治的86例均行造血干细胞移植治疗的SAA患者为研究对象,按随机数表法分为综合干预组和常规干预组各43例。常规干预组患者给予常规的护理干预,综合干预组患者在常规干预基础上给予综合性优质护理干预,均干预3个月。比较两组患者干预前后的心理状态[焦虑自评量表(SAS评分)、抑郁自评量表(SDS评分)]、应对方式、睡眠质量[匹兹堡睡眠质量量表(PSQI评分)]和生活质量[生活质量综合评定问卷-74(GQOL-74评分)],同时比较两组干预后治疗依从性及干预期间的并发症发生率。结果干预后,综合干预组患者的SAS评分、SDS评分、消极应对评分、PSQI评分分别为(45.82±1.42)分、(43.87±1.14)分、(10.32±0.76)分、(7.46±1.14)分,明显低于常规干预组的(54.38±2.28)分、(53.16±1.25)分、(14.15±0.83)分、(10.18±1.21)分,积极应对评分为(27.41±1.03)分,明显高于常规干预组的(22.96±0.75)分,差异均有统计学意义(P<0.05);干预后,综合干预组患者的社会功能评分、躯体功能评分、心理功能评分及GQOL-74总分分别为(89.14±2.25)分、(85.67±2.59)分、(87.79±1.25)分、(262.60±3.11)分,明显高于常规干预组的(80.34±1.36)分、(78.45±1.43)分、(82.34±1.08)分、(241.13±2.85)分,差异均有统计学意义(P<0.05);综合干预组患者的总治疗依从率为95.35%,明显高于常规干预组的79.07%,差异有统计学意义(P<0.05);干预期间,综合干预组患者的口腔感染、肺部感染、呕吐、腹泻发生率分别为4.65%、4.65%、18.60%、18.60%,明显低于常规干预组的23.26%、20.93%、39.53%、44.19%,差异均有统计学意义(P<0.05)。结论综合性优质护理可改善采用造血干细胞移植治疗的SAA患者的负性情绪,调节其应对方式,提升其治疗依从性,预防并发症的发生,进而改善患者的睡眠质量和生活质量。

Shape formation of closed-cell aluminum foam in solid–liquid–gas coexisting state

The mold pressing process was applied to investigate the formability of closed-cell aluminum foam in solid–liquid–gas coexisting state.Results show that the shape formation of closed-cell aluminum foam in the solid–liquid–gas coexisting state was realized through cell wall deformation and cell movement caused by primary α-Al grains that slid,rotated,deformed,and ripened within cell walls.During formation,characteristic parameters of closed-cell aluminum foam were almost unchanged.Under proper forming conditions,shaped products of closed-cell aluminum foam could be fabricated through mold pressing.

贵州威宁对流单体雷达回波分层结构特征分析

本文选取了2017—2020年威宁县111个对流单体(35个冰雹云单体和76个雷雨云单体),着重分析了对流单体雷达回波在垂直指向上的分层结构特征,并结合双偏振雷达观测分析了对流云单体偏振参量和水凝物相态分布特征。研究分析结果表明:①威宁对流单体雷达回波典型特征量基本一致,对流单体生命史周期约为100 min,最大反射率因子主要位于与0℃层高度差±2.0 km的范围内;②当对流单体雷达回波强度从45 dBz发展到55 dBz以上时,冰雹云具有发展迅速且持续时间长的特点,冰雹大小则与强回波在融化层高度以上的扩展高度存在一定的对应关系,高度越高、冰雹越大;③X波段双偏振天气雷达能够较好地反映降水粒子类型,基本符合粒子形状、大小和相态分布的特点,但应考虑降水相态粒子处于临界过渡区域的转化特点;④威宁多小冰雹主要与垂直风切变较弱、对流有效位能CAPE值不稳定能量偏低,且中小冰雹在下落过程中逐渐融化变小有关。

n-i-p与p-i-n结构钙钛矿太阳能电池冠军效率器件性能提升策略的比较与分析

总结了2017—2023年间n-i-p与p-i-n结构钙钛矿太阳能电池冠军效率器件的具体性能参数及性能提升策略。通过纵向对比相同结构器件不同时期的性能参数,可明确不同策略对性能的影响;通过横向分析各个时期不同结构器件所采取的性能提升策略,可给出钙钛矿太阳能电池最前沿发展方向的演变,以期作为获得更高性能器件的参考。

基于固态电解质膜的软包电池制备与初步表征

固态电池安全性高、可适应高比能正负极,是蓄电池发展的方向,但存在固相界面阻抗大、界面结构稳定性差等问题。为了快速评估固态电池技术在实用型蓄电池中的作用,本文采用流延法制备了在50℃下离子电导率为6.16×10^(-4)S/cm的固态电解质膜。以高镍三元为正极、石墨为负极,制备了质量为1.1214 g、容量为53.44 mAh的微型软包电池和容量为7252.8 mAh的大容量软包电池。微型软包电池实现了5 C高倍率的放电和150次循环,大容量软包电池在放电深度(DOD)为13.78%时,实现了439次循环充放电。以上结果说明固态电解质膜满足在锂离子电池中使用的要求,然而这些电池的界面构筑仍有不足之处。基于本文结果,通过对固态电解质膜材料、电池化成制度等进行改进,有望促进高性能电池的研发。

基于粒子滤波算法的质子交换膜燃料电池健康状态估计

质子交换膜燃料电池的老化过程影响其输出性能,为了更精确地控制输出功率,需要考虑燃料电池的老化和功率衰退趋势。以功率-电流曲线作为健康状态指标,在以往研究的基础上进行改进,考虑开路电压在老化过程中的变化,增加老化模型中老化因子的个数,建立了质子交换膜燃料电池功率和内部部件老化之间的映射关系,基于极化曲线推导了半机理功率衰减模型,并基于正则化粒子滤波算法设计了老化率模型,结合功率衰减实现对燃料电池健康状态的估计。在测试数据集上进行了仿真试验,并和试验测试数据进行对比,结果表明,该方法能对长期性能衰减模型进行预测,相比于已有的研究方法,该方法能通过老化率参考值和功率衰减模型更准确地估计质子交换膜燃料电池的健康状态和性能衰减趋势,随着训练时间的缩短,估计精度较之提升,尤其是在训练时间长度100h,估计时间长度250h,误差相对下降率达65.69%。

储能用质子交换膜燃料电池长期老化预测

质子交换膜燃料电池(PEMFC)的长期老化预测有助于缩短耐久性测试时间,降低成本,为维护策略提供依据。针对超参数问题,提出一种将优化算法和储备池计算相结合的数据驱动预测方法。基于耐久性测试数据集,以电堆输出电压为老化指标,利用麻雀搜索算法(SSA)优化回声状态网络(ESN)的储备池尺寸、泄漏率和正则化系数,以构建预测模型。分别利用原始数据的前30%、40%、50%和60%作为训练集训练模型,验证模型在各训练集比例下的长期老化预测性能。训练集比例为30%时,所提方法在静态工况下的长期预测均方根误差(RMSE)达到0.0083,准动态工况下可达到0.0359。

燃料电池增程式动力系统能量管理策略研究

以某款纯电动客车为研究对象,以增加车辆续驶里程为目的,提出燃料电池增程式混合动力系统结构,根据性能指标对动力系统各部件进行匹配计算和选型.提出了开关/功率跟随式能量管理策略,基于Cruise和Simulink分别搭建了整车动力系统模型和燃料电池及能量管理策略模型并进行联合仿真.结果表明,采用文中提出的能量管理策略车辆经济性相对于开关式和能量跟随式两种控制策略分别提高62%和31%,续驶里程相对于该两种控制策略分别提高41%和18%.

动态控制元结构的建模及其在StateFlow环境下的仿真

针对我们提出的动态控制元结构新理念,进行层次组合和并列结构扩展,并论证扩展后的系统的控制特性,从而使得所构建的整个系统能同时满足功能需求和控制需求。在上述设计思想基础上,以瓷砖分布式制造作为系统原型,选取设备单元为动态控制元结构,构建了整个系统,并用Matlab/stateflow对整个系统构建和运行全过程进行仿真,仿真结果验证了该理念的正确性和可行性。