Mass-producible low-cost flexible electronic fabrics for azo dye wastewater treatment by electrocoagulation

Electrocoagulation is progressively becoming an ecologically friendly water treatment method owing to its lack of secondary pollution,high active ingredient concentration,high treatment effectiveness,simple equipment,and simplicity of automated control implementation.Herein,electrocoagulation is offered as a method for treating wastewater containing azo dyes using a revolutionary flexible electronic fabric that can be mass-producible at a reasonable price.A computer-controlled machine embroiders 316L stainless steel fiber(316L SSF)onto an insulating fabric to manufacture a flexible electronic device of cathode and anode with a monopolar arrangement on the fabric surface.Using methyl orange(MO)solution to simulate azo dye wastewater,the decolorization rate of 500 ml MO reached 99.25% under the conditions of 50 mg·L^(-1)initial mass concentration,120 min electrolysis time,15 mA·g^(-1)current density,1 cm electrode spacing,0.1 mol·L^(-1)NaCl,pH 7.6,200 r·min^(-1)rotational speed of the stirrer,and 22-25℃ room temperature.In addition,it is feasible to embroider flexible electronic fabrics with varied sizes and numbers of electrodes based on the amount of treated sewage to increase the degradation rate,which has significant practical application value.

基于R-L分数阶定义的CCM Flyback变换器建模与分析

针对电容电感都为分数阶这一事实,利用分数阶微积分R-L定义和状态空间平均法,对工作在电感电流连续模式(CCM)下的分数阶Flyback变换器进行建模与分析。推导CCM分数阶Flyback变换器的静态工作点和小信号传递函数以及变换器工作在CCM模式下的条件。其次,讨论Caputo模型与R-L导数模型的区别,得出在R-L分数阶定义下直流静态工作点不仅与占空比相关,而且还与电感和电容的阶数以及负载有关。最后,在PSIM中搭建R-L分数阶CCM Flyback变换器电路模型,得到不同分数阶电感电容阶数下分数阶Flyback变换器输出电压和电感电流的仿真波形,通过仿真结果与理论计算结果对比,验证所建模型的正确性,得出分数阶电感电容的阶数会影响闭环控制器的设计和分数阶模型能更加精确地描述Flyback变换器的工作特性。

非洲猪瘟病毒B602L蛋白的原核表达、纯化及多克隆抗体制备

【目的】非洲猪瘟病毒(African swine fever virus,ASFV)是对生猪养殖业危害极大的一种病原体,B602L蛋白作为其重要的非结构蛋白,是衣壳蛋白p72折叠为正确的三级结构的伴侣分子之一,在病毒组装成二十面体结构的过程中发挥着关键作用。特异性抗体对于抗非洲猪瘟免疫应答机制及血清学检测方法研究具有重要意义,本研究旨在获取ASFV B602L蛋白,并制备抗ASFV B602L蛋白的多克隆抗体,为ASFV B602L蛋白功能研究及相关诊断试剂的研发提供材料。【方法】以ASFV China/2018/AnhuiXCGQ株的B 602 L基因为研究对象,应用生物信息学软件对B602L蛋白的理化性质、信号肽、跨膜结构、抗原性和蛋白结构进行分析后,利用同源重组的方法将其克隆至原核表达载体pET-28a(+)中,转化大肠杆菌BL21(DE3)感受态细胞后经诱导表达获得B602L重组蛋白,利用镍柱亲和层析进行蛋白纯化,通过SDS-PAGE和Western blotting对B602L蛋白纯化效果进行验证。将纯化后的B602L蛋白免疫BALB/c小鼠制备多克隆抗体,通过间接ELISA方法测定多克隆抗体效价,通过Western blotting和Dot blotting检测多克隆抗体特异性。【结果】生物信息学分析表明,B602L蛋白属于稳定性亲水蛋白,无跨膜区和信号肽。二级结构主要含有α-螺旋(54.91%)、延伸链(9.81%)和无规则卷曲(32.08%)。成功构建了ASFV B602L重组质粒,SDS-PAGE和Western blotting结果显示,重组菌pET-28a-B602L-BL21在16℃、0.5 mmol/L IPTG诱导下高效表达,获得的重组蛋白主要表达在BL21菌株上清中,大小约为70 ku,且能与ASFV阳性血清特异性结合。间接ELISA检测结果显示,制备的抗B602L鼠源多克隆抗体效价达1∶409600,Western blotting和Dot blotting试验结果表明,抗B602L鼠源多克隆抗体能够特异性识别B602L蛋白。【结论】原核表达的B602L重组蛋白具有良好的免疫原性,能够与ASFV阳性血清特异性结合,制备的鼠抗ASFV B602L蛋白多克隆抗体具备较好的生物学活性。本试验结果可为进一步研究ASFV B602L蛋白的生物学功能和非洲猪瘟诊断方法的建立提供生物材料和理论支撑。

The research progress of an E//B neutral particle analyzer

An E//B neutral particle analyzer(NPA)has been designed and is under development at Sichuan University and Southwestern Institute of Physics.The main purpose of the E//B NPA is to measure the distribution function of fast ions in the HL-2A/3 tokamak.The E//B NPA contains three main units,i.e.the stripping unit,the analyzing unit and the detection unit.A gas stripping chamber was adopted as the stripping unit.The results of the simulations and beam tests for the stripping chamber are presented.Parallel electric and magnetic fields provided by a NdFeB permanent magnet and two parallel electric plates were designed and constructed for the analyzing unit.The calibration of the magnetic and electric fields was performed using a 50 kV electron cyclotron resonance ion source(ECRIS)platform.The detection unit consists of 32lutetium-yttrium oxyorthosilicate(LYSO)detector modules arranged in two rows.The response functions ofα,hydrogen ions(H^(+),H_(2)^(+)and H_(3)^(+))andγfor a detector module were measured with^(241)Am,^(137)Cs and^(152)Eu sources together with the 50 kV ECRIS platform.The overall results indicate that the designed E//B NPA device is capable of measuring the intensity of neutral hydrogen and deuteron atoms with energy higher than 20 keV.

MyD88L265P及CD79B基因突变对原发性中枢神经系统淋巴瘤预后的影响

目的探究MyD88L265P及CD79B基因突变对原发性中枢神经系统淋巴瘤(PCNSL)患者预后的影响。方法收集2018年8月-2020年11月于兰州大学第二医院经开颅手术或立体定位活检术确诊的18例免疫功能正常(无HIV感染及免疫抑制药服用病史)的PCNSL患者临床资料进行回顾性分析。分别采用实时荧光定量PCR和一代基因测序技术检测18例PCNSL患者肿瘤组织中MyD88L265P和CD79B基因突变情况。针对可能与PCNSL首次无疾病进展生存期(PFS)和总生存期相关的指标行单因素分析,并采用Cox回归进行多因素分析。结果18例PCNSL肿瘤组织MyD88L265P突变率为38.9%,CD79B突变率为33.3%,MyD88L265P/CD79B共突变率为27.8%。单因素分析结果显示,病灶多发、病灶深部受累、肿瘤组织CD79B突变患者的PFS时间更短(P<0.05);多因素分析结果显示,病灶深部受累(HR=0.135,95%CI 0.023~0.799,P<0.05)、肿瘤组织CD79B突变(HR=0.149,95%CI 0.028~0.800,P<0.05)是PCNSL患者预后不良的独立危险因素。结论本组PCNSL患者肿瘤组织MyD88L265P、CD79B突变频率较高,这两种基因突变尤其是CD79B突变可能与PCNSL不良预后相关。

汽油车无法发动综合故障快速诊断研究分析——以大众迈腾B8L为例

本文主要分析汽油发动机作为动力主体的燃油车辆无法发动的具体故障现象以及根据故障现象快速判断故障方向的方法。详细阐述以大众迈腾B8L为例的汽油车无法发动的故障现象与原因以及测量方法,总结了汽油车无法发动故障的快速诊断诀窍。内容包含汽油发动机电控系统的全部内容与要点,汽油车仍旧是社会交通工具的主体,本文仍具有一定的研究价值与意义。

Evaluation of the Potential of Araucaria angustifolia Seeds as Source of Oligosaccharides, Resistant Starch and Growth of Probiotic Bacteria

“Pinhão”, the seed of Araucaria angustifolia, is an important food, being part of the eating habits of Indigenous communities. In this study, we evaluated the oligosaccharide content, resistant starch and the growth of probiotic bacteria. GF4 (1-fructofuranosylnystose) was the main fructo-oligosaccharides found, in higher contents compared to other food sources. Maltooligosaccharides (MOS) represented the main part of the oligosaccharides profile of Brazilian pine seeds. In descending order of importance was maltoheptaose (G7), maltohexose (G6) and maltotriose (G3). The starches from the variety Sanct josephi presented the highest amount of resistant starch that could stimulate probiotic strains, mainly B. breve and L. plantarum, and may have a prebiotic effect, potentially promoting health benefits. This study advances the understanding of the chemical composition of the main portion of the “pinhão” enhancing awareness of its potential as a healthy food source, contributing to different uses and indirectly with the species preservation.

大众迈腾B8L轿车启动系统工作过程与故障诊断分析

以大众迈腾B8L轿车发动机启动系统为例,分析启动系统的工作过程以及当启动系统出现故障时的诊断流程和思路。分析认为,维修人员熟悉该车发动机启动系统的工作过程,能够对启动系统工作条件是否正常进行判断,以及可以熟练掌握该车发动机启动系统的诊断流程。

A Hybrid Optimization Approach of Single Point Incremental Sheet Forming of AISI 316L Stainless Steel Using Grey Relation Analysis Coupled with Principal Component Analysiss

We investigated the parametric optimization on incremental sheet forming of stainless steel using Grey Relational Analysis(GRA) coupled with Principal Component Analysis(PCA). AISI 316L stainless steel sheets were used to develop double wall angle pyramid with aid of tungsten carbide tool. GRA coupled with PCA was used to plan the experiment conditions. Control factors such as Tool Diameter(TD), Step Depth(SD), Bottom Wall Angle(BWA), Feed Rate(FR) and Spindle Speed(SS) on Top Wall Angle(TWA) and Top Wall Angle Surface Roughness(TWASR) have been studied. Wall angle increases with increasing tool diameter due to large contact area between tool and workpiece. As the step depth, feed rate and spindle speed increase,TWASR decreases with increasing tool diameter. As the step depth increasing, the hydrostatic stress is raised causing severe cracks in the deformed surface. Hence it was concluded that the proposed hybrid method was suitable for optimizing the factors and response.

Rhizobium Inoculation and Micronutrient Addition Influence the Growth,Yield,Quality and Nutrient Uptake of Garden Peas(Pisum sativum L.)

Garden pea productivity and qualities are hampered in zinc(Zn),boron(B),and molybdenum(Mo)deficient soil.Thus,the combination of micronutrients(i.e.,Zn,B,and Mo)and rhizobium is necessary to increase the productivity and quality of garden peas,since this management for garden peas is neglected in Bangladesh.Therefore,the present study was made to assess the effectiveness of rhizobium inoculant singly or in combination with the micronutrients(i.e.,Zn,B,and Mo)on growth,yield,nutrient uptake,and quality of garden peas.Treatments were:T_(1)=Control,T_(2)=Rhizobium inoculation at 50 g/kg seed,T_(3)=T_(2)+Zn_(3)Mo1,T_(4)=T_(2)+B_(2)Mo1,T_(5)=T_(2)+Zn_(3)B_(2),T_(6)=T_(2)+Zn_(3)B_(2)Mo1 and T_(7)=Zn_(3)B_(2)Mo1.All treatments were arranged in a randomized complete block design and repeated all treatments in three times.The application of 3 kg Zn,2 kg B,and 1 kg Mo ha^(−1)with inoculation of Rhizobium at 50 g kg^(−1)seed(T_(6))facilitated to increase of 44.8%in the green pod and 29.7%seed yield over control.The same treatment contributed to attaining the maximum nodulation(25.3 plant^(−1)),Vitamin C(43.5 mg 100 g^(−1)),protein content(22.2%),and nutrient uptake as well as accumulation in garden peas.Among all treatment combinations,treatment T_(6)was found superior to others based on microbial activities,soil fertility,and profitability.The results of the study found that the application of 3 kg Zn,2 kg B,and 1 kg Mo ha^(−1)in combination with Rhizobium inoculation(50 g kg^(−1)seed)can improve the yield and quality of garden peas.The results of the study have the potential for the areas,where there is no use of Rhizobium inoculant or Zn,B,and Mo fertilizer for cultivation of garden pea.

迈腾B8L发动机无法启动故障诊断与排除

以高职国赛“汽车故障检修”选用的迈腾B8L为对象,诊断与排除电气系统的典型部件损坏造成发动机无法启动的故障。首先,描述了发动机无法启动的故障现象:全车不上电、起动机无法运转及起动机运转不着车等;其次,介绍迈腾B8L的启动策略:整车上电策略及起动机运转策略;再次,选取点火开关损坏造成的不上电故障,动力总线损坏造成的起动机不运转故障,起动继电器及其线路损坏造成的起动机不运转故障,曲轴位置传感器及其线路损坏造成的不着车故障;最后,对点火开关、动力总线、启动继电器及其线路、曲轴位置传感器及其线路的故障进行了诊断与排除。在不使用故障诊断仪的前提下,为以上四大部件损坏造成的发动机无法启动故障,提供了系统、全面、有效的排除方法,也为诊断与排除其他部件的故障提供了详细的参考依据。

Bioactive chemical constituents from the marine-derived fungus Cladosporium sp.DLT-5

A new isochromanone,cladosporinisochromanone(1),accompanied by 15 known compounds(2–16)were obtained from secondary metabolites produced by marine-derived fungus Cladosporium sp.DLT-5.NMR and HRESIMS spectra elucidation determined the planar structure of 1.Subsequent electronic circular dichroism(ECD)experiment assigned the absolute configuration of 1.Compounds 1,2,4–6,and 10 displayed different degrees of neuroprotective activities on human neuroblastoma cells SH-SY5Y.Five compounds(1,3–5,and 13)emerged resistance to protein tyrosine phosphatase 1B(PTP1B),further kinetic analysis and molecular docking study indicated that the most potent compound 13(IC50value of 10.74±0.61μmol/L)was found as a noncompetitive inhibitor for PTP1B.Surface plasmon resonance(SPR)and molecular docking studies also demonstrated the interaction between compound 12 and Niemann-Pick C1 Like 1(NPC1L1),which has been identified as significant therapeutic target for hypercholesteremia.In addition,compounds 3,6,and 14 showed attractive inhibitory activity against the phytopathogenic fungi:Colletotrichum capsici.Therefore,library of Cladosporium metabolites is enriched and new active uses of known compounds are explored.

马头山羊羊口疮病毒的分离鉴定及其B2L基因的特征分析

为确定湖北省某马头山羊养殖场发生的疑似羊口疮(Orf)的病原及其分子生物学特征。本试验利用牛睾丸细胞对马头山羊唇部痂皮病料进行病毒分离培养,通过细胞病变观察、病毒滴度测定、PCR扩增和测序等方法对分离毒株进行了鉴定。并采用MegAlign、MEGA 7.0、DNAMAN和Bioedit等软件分析了分离毒株和China Vaccine毒株B2L基因的核苷酸序列相似性,并预测了蛋白二级结构和疏水性。结果显示,接种病料上清液的牛睾丸细胞盲传5代后出现细胞病变,经PCR扩增的分离毒株B2L基因大小为1137 bp;所分离羊口疮病毒(ORFV)病毒滴度可达105.5TCID50/mL;分离毒株与AH1404、FJ-YX和GX-BH毒株B2L基因同源性为99.3%;与China Vaccine毒株同源性为89.5%。分离毒株与China Vaccine毒株B2L基因序列分析显示处在不同分支,两者存在8个位点突变(aa11、aa80、aa101、aa123、aa126、aa294、aa327和aa333);B2L蛋白为稳定的疏水性蛋白;分离毒株和China Vaccine毒株的蛋白二级结构存在差异。结果表明,该养殖场ORFV的B2L基因出现变异,有关部门应当加强对ORFV流行情况的监测。

Crocus sativus L.produces anti-inflammatory effects and regulates the NLRP3–NF-κB pathway

Objective:This study aimed to evaluate the anti-inflammatory effects of petal and stamen extracts of saffron crocus(Crocus sativus)and explore the underlying mechanism.Methods:Local and systemic inflammation models were used to investigate the anti-inflammatory effects of C.sativus.A xyleneinduced inflammation model or lipopolysaccharide(LPS)-induced inflammation model was used in this study.C.sativus petal and stamen extracts were each administered to the mice in the xylene and LPS models by gavage for 14 d at 0.1 and 0.4 g/kg doses,respectively.Enzyme-linked immunosorbent assay(ELISA)was used to measure the concentrations of tumor necrosis factor(TNF)-αand interleukin(IL)-1βin mouse serum.Hematoxylin and eosin(H&E)staining was used to observe the pathological changes in the ear in the xylene-induced inflammation model and in the spleen in the LPS-induced inflammation model.NOD-like receptor thermal protein domain associated protein 3(NLRP3)protein levels within the nuclear factor-kappa B(NF-κB)pathway were assessed using western blotting.RAW264.7 cells were treated with LPS(5μg/mL)and LPS+C.sativus(0.05,0.1,and 0.2 mg/mL)for 24 h,and a Cell Counting Kit-8 was used to measure cell proliferation.Changes in NLRP3 and NF-κB levels were evaluated by western blotting.Results:Petal and stamen extracts of C.sativus attenuated the anti-inflammatory effects in local or systemic inflammatory models and repaired pathological changes in the ear in the xylene-induced inflammation model and spleen in the LPS-induced inflammation model.These extracts also decreased the concentrations of TNF-αand IL-1βin the mouse serum in the LPS-induced inflammation model.C.sativus downregulated NLRP3 protein level through the NF-κB pathway and downregulated LC-3 and BECLIN1 in vivo and in vitro.Carbonyl Cyanide3-ChloroPhenylhydrazone(CCCP)weakened the effects of C.sativus on the NLRP3–NF-κB pathway.Conclusion:C.sativus has anti-inflammatory effects and regulates the NLRP3-NF-κB pathway.

2020款迈腾B8L发动机无法启动故障检修

一辆2020款迈腾B8L轿车,按启动按钮,仪表正常点亮;踩刹车同时按启动按钮,启动机有吸合声音但无法转动,无着车迹象。针对该故障现象,根据故障产生机理,依次对该车发动机启动系统的相关部件及其电路等进行了检测诊断。最终排查出的故障原因是,发动机控制单元J623的P/N挡信号线与启动反馈信号线短路,对其进行修复后,发动机可正常启动,车辆故障排除。

弥漫大B细胞淋巴瘤中MYD88、NAP1L5基因特征与临床特征及预后的关系

目的 探讨弥漫性大B细胞淋巴瘤(Diffuse Large B-cell Lymphoma, DLBCL)中MYD88和NAP1L5基因的特征,及其与临床表现和预后之间的关系。方法 分析本院2019年1月至2022年12月期间的87例DLBCL患者中MYD88和NAP1L5基因突变的情况,并分析其与临床特征的关系。评估影响DLBCL患者总生存期的相关因素。结果 87例患者中,31例出现MYD88基因异常,35例出现NAP1L5基因异常。两个基因共异常率为26.43%。MYD88和NAP1L5基因异常及共异常主要集中在ABC型DLBCL中,阳性率分别达74.19%、74.28%、73.91%。在Ⅲ~Ⅳ期病例中,MYD88基因异常和两基因共异常的比例(61.29%、65.21%)均高于I~II期的病例(P<0.05)。在IPI指数为3~5的病例中,MYD88基因异常的比例(64.51%)高于IPI指数为0~2的病例(P<0.05)。生存时间的单因素分析显示,病理分型、临床分期、MYD88、NAP1L5基因异常组和两基因共异常是影响因素。生存分析显示,不同病理分型、临床分期、MYD88基因状态、NAP1L5基因状态、MYD88、NAP1L5基因共异常情况患者的生存时间差异显著(P<0.05)。临床分期、MYD88和NAP1L5基因共异常是影响患者总生存期的独立因素(P<0.05)。结论 MYD88、NAP1L5基因异常与DLBCL的临床特征密切相关,临床分期和MYD88和NAP1L5基因的共异常是影响DLBCL患者总生存期的独立因素。

Possible Nature of an Electron Dense Substance in the Thylakoid Lumen of Chloroplasts

The fixation of leaves of Tanacetum vulgare L. in glutaraldehyde makes it possible to isolate chloroplasts without sacrificing an electron dense substance in the thylakoid lumen. The extraction of lipids from the chloroplasts isolated from the leaves preliminarily fixed in glutaraldehyde has demonstrated that glycerolipids (galactolipids and phospholipids) are not manifested in TLC, whereas isoprenoid lipids (chlorophyll, carotenoids) are manifested. Presumably, isoprenoid lipids are not fixed with glutaraldehyde and are extracted from the thylakoid membrane. The ultrastructural control demonstrates that the electron dense substance from the thylakoid lumen is also extracted. It is possible that this substance is of isoprenoid nature.

Evaluation of the Effectiveness of “Electron Go out Mosquito Small Lamp” in Disease Vector Mosquito Control Benin West Africa

In the context of mosquito control, a plethora of devices have been put on the market. The effectiveness of these devices is not always proven, but some have interesting principles that have the potential to be a good means of mosquito control. Among these interesting devices are the photonic traps. We have carried out nightly captures of mosquitoes on human baits in the presence and absence of the device. These captures were made during the rainy season in the localities of Zogbadjè and Mènontin. The captures were made under the same atmospheric conditions at the same locations at 5-day intervals. These captures were made twice per house, indoors and outdoors, with one blank capture without the device and one capture with the device. The captured mosquitoes were identified and classified by genus and their aggressiveness determined by calculating the biting rate. A total of 845 mosquitoes were captured during these captures with 296 mosquitoes captured indoors without the device and 132 mosquitoes with the device present. This represents a decrease of 55.40% in culicidae density. Furthermore, a significant decrease was observed in aggressiveness, from 49 to 22 bites per man per night (b/m/n) with the use of the device. This decrease is even more important for nocturnal species such as Anopheles spp. whose aggressiveness decreased by 90%. The present study confirms the effectiveness of the “Electron go out mosquito small lamp” in reducing Culicidae density and mosquito aggression even in the presence of chemotactic interference. However, this study was limited in time and focused only on the ability of the device to reduce mosquito numbers and did not assess its epidemiological efficacy. It is therefore important to extend the work to examine the influence of the use of this device on population health and the occurrence of mosquito-borne diseases, particularly malaria.

Synthesis and Electronic Structure of A2B Type Halogen Atoms Substituted H3-Triarylcorroles

Seven electron-deficient A_2 B type H_3-triarylcorroles have been synthesized and characterized. The solvent dependence of the electronic absorption and magnetic circular dichroism（MCD） spectra and a series of TD-DFT calculations have been used to analyze trends in the electronic structures. Significant differences are observed in the optical spectra when solvents of differing polarity are used,which can be assigned to the effect of NH-tautomerism.

Ultrastructural Analysis of the Ontogenetic Development of Shoot Induced from Embryonic Axes of Costa Rican Bean Varieties (<i>Phaseolus vulgaris</i>L.) under <i>in Vitro</i>Conditions by Scanning Electronic Microscopy

Common bean (Phaseolus vulgaris L.) is an economic important crop and one of the major grain legumes for human consumption in Latin America, Africa and Asia. A morphological study of shoot induced from embryonic axes development in four Costa Rican bean varieties (Brunca, Huetar, Guaymi and Bribri) cultivated on MS media with or without 5 mg·L–1 de N6-benzylaminopurine (BAP) by scanning electron microscopy (SEM) was developed in the present work. Micrographs showed similarities and differences in the ultrastructure of the apical dome, epidermal surface, stomata and different types of trichomes in the varieties cultivated on organogenesis media. Genotypes with advantageous morphological characteristics for genetic transformation, in particular an exposed apical dome, were identified. This work will contribute to the optimization of the in vitro regeneration of four common bean varieties.