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接触辉光放电等离子体对互隔交链孢的灭活机理及其动力学

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辐射研究与辐射工艺学报 2024年第3期42卷 69-80页

作者：唐宏升李昭弟李琬李毅杨帅龙海涛蒲陆梅甘肃农业大学理学院兰州730000

互隔交链孢(Alternaria alternata)是一种引起梨、枸杞等黑霉病最主要的病原菌。本文研究了接触辉光放电等离子体(CGDP)对互隔交链孢的杀菌作用与机理。首先通过考察不同时间、电解质和电压条件对杀菌效率的影响,确定了最佳的杀菌工艺... 详细信息

互隔交链孢(Alternaria alternata)是一种引起梨、枸杞等黑霉病最主要的病原菌。本文研究了接触辉光放电等离子体(CGDP)对互隔交链孢的杀菌作用与机理。首先通过考察不同时间、电解质和电压条件对杀菌效率的影响,确定了最佳的杀菌工艺与条件。其次通过评估CGDP对互隔交链孢细胞膜完整性和孢子内核酸和蛋白质的渗漏量等的影响,研究了CGDP对互隔交链孢的杀菌机理,并构建了灭活动力学模型。结果表明,CGDP对互隔交链孢的杀菌效果显著。杀菌率随着电压的升高和处理时间的延长而增大;孢子内核酸和蛋白质的渗漏量随着处理时间的延长逐渐升高。碘化丙啶、二乙酸荧光素染色和扫描电镜结果表明,CGDP对互隔交链孢的杀菌作用是通过CGDP破坏其形状和细胞膜完整性实现的。孢子失活动力学符合Dose-response模型。研究结果为CGDP对互隔交链孢的杀菌机理提供了重要的理论基础。

关键词：接触辉光放电等离子体互隔交链孢杀菌机理

维普期刊数据库

Added Value of Quantitative Apparent Diffusion Coefficients for Identifying Small Hepatocellular Carcinoma from Benign Nodule Categorized as LI-RADS 3 and 4 in Cirrhosis

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Journal of Clinical and Translational Hepatology 2022年第1期10卷 34-41页

作者： Xi Zhong hongsheng tang Tianpei Guan Bingui Lu Chuangjia Zhang Danlei tang Jiansheng Li Shuzhong Cui Department of Medical Imaging Affiliated Cancer Hospital&Institute of Guangzhou Medical UniversityGuangzhouGuangdongChina Department of Abdominal Surgery Affiliated Cancer Hospital&Institute of Guangzhou Medical Univer-sityGuangzhouGuangdongChina

Background and Aims:Correct identification of small hepa-tocellular carcinomas(HCCs)and benign nodules in cirrhosis remains challenging,quantitative apparent diffusion coeffi-cients(ADCs)have shown potential value in characterization of benign and malignant liver *** aimed to explore the added value of ADCs in the identification of small(≤3 cm)HCCs and benign nodules categorized as Liver Imag-ing Reporting and Data System(LI-RADS)3(LR-3)and 4(LR-4)in ***:Ninety-seven cirrhosis patients with 109 small nodules(70 HCCs,39 benign nodules)of LR-3 and 4 LR-4 based on major and ancillary magnetic resonance imaging features were *** quantitative ADCs of the lesions,including the mean ADC(ADCmean),min-imum ADC(ADCmin),maximal ADC(ADCmax),ADC standard deviation(ADCstd),and mean ADC value ratio of lesion-to-liv-er parenchyma(ADCratio)were *** the joint diagnosis,a nomogram model was plotted using multivariate logistic regression *** performance was assessed using the area under the receiver operating characteristic curve(AUC).Results:The ADCmean,ADCmin,ADCratio,and ADCstd were significantly associated with the identification of small HCC and benign nodules(p<0.001).For the joint diagnosis,the LI-RADS category(odds ratio[OR]=12.50),ADCmin(OR=0.14),and ADCratio(OR=0.12)were identified as independent factors for distinguishing HCCs from benign *** joint nomogram model showed good calibration and discrimination,with a C-index of *** with the LI-RADS category alone,this nomogram model demon-strated a significant improvement in diagnostic performance,with AUC increasing from 0.820 to 0.967(p=0.001).Con-clusions:The addition of quantitative ADCs could improve the identification of small HCC and benign nodules catego-rized as LR-3 and 4 LR-4 in patients with cirrhosis.

关键词： Hepatocellular carcinoma Liver cirrhosis Liver imaging reporting and data system Magnetic resonance imaging diagnosis

激光诱导击穿光谱(LIBS)结合机器学习算法快速测定石油焦中微量元素

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中国无机分析化学 2024年第2期14卷 197-204页

作者：刘一江闫春华李茂刚张天龙汤宏胜李华西安石油大学化学化工学院西安710065 西北大学化学与材料科学学院合成与天然功能分子教育部重点实验室西安710127

石油焦中微量元素对其作为预焙阳极的性能起着决定性的作用。首先,通过基于LIBS光谱构建用于石油焦中铁(Fe)和铜(Cu)定量分析的PLS校正模型。然后,考察了不同光谱预处理(归一化、多元散射校正、标准正态变换、一阶导数和二阶导数)以及... 详细信息

石油焦中微量元素对其作为预焙阳极的性能起着决定性的作用。首先,通过基于LIBS光谱构建用于石油焦中铁(Fe)和铜(Cu)定量分析的PLS校正模型。然后,考察了不同光谱预处理(归一化、多元散射校正、标准正态变换、一阶导数和二阶导数)以及变量选择算法(粒子群优化算法和变量重要性投影)对PLS校正模型预测性能的影响。建立了一种基于激光诱导击穿光谱(Laser-induced breakdown spectroscopy,LIBS)结合偏最小二乘(Partial least squares,PLS)的石油焦中微量元素定量分析方法。结果显示,与其他PLS校正模型相比,基于二阶导数和变量重要性投影的PLS模型对Fe的预测性能最优,最优的交叉验证相关系数(R-squared cross validation,R^(2) cv)为0.9667,均方根误差(Root mean squared error cross validation,RMSEcv)为10.2821 mg/kg,预测集的相关系数(R-squared prediction,R^(2) p)为0.8638,均方根误差(Root mean squared error prediction,RMSEp)为14.5078 mg/kg;而对于Cu,基于多元散射校正和粒子群优化的PLS模型的预测性能最优,最优的交叉验证R^(2) cv为0.9553,RMSEcv为6.3300 mg/kg,预测集R^(2) p为0.9269,RMSEp为7.6502 mg/kg。因此,LIBS结合PLS可为石油焦中微量元素含量的快速检测提供一种可行方法。

关键词：石油焦激光诱导击穿光谱偏最小二乘定量分析

维普期刊数据库

Quantitative Analysis of Methanol in Methanol Gasoline by Calibration Transfer Strategy Based on Kernel Domain Adaptive Partial Least Squares(kda-PLS)

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Chemical Research in Chinese Universities 2022年第4期38卷 1057-1064页

作者： XU Yanyan LI Maogang FENG Ting JIAO Long WU Fengtian ZHANG Tianlong tang hongsheng LI Hua Northwest University Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of EducationCollege of Chemistry&Materials ScienceXi’an710127P.R.China College of Chemistry and Chemical Engineering Xi’an Shiyou UniversityXi’an710065P.R.China

The application of near-infrared(NIR)spectroscopy combined with multivariate calibration methods can achieve the rapid analysis of methanol ***,instrumental or environmental differences found for spectra make it impossible to continuously apply the previously developed calibration ***,the calibration transfer technique would be required to solve the time-consuming and laborious problem of reestablishing a new *** this work,a calibration transfer method named kernel domain adaptive partial least squares(kda-PLS)was applied to the calibration transfer from the primary instrument to the secondary ***,wavelet transform(WT)and variable importance in projection(VIP)were employed to enhance the predictive performance of the kda-PLS transfer ***,the results found for the calibration transfer by piecewise direct standardization(PDS)and domain adaptive partial least squares(da-PLS)were compared to verify the calibration transfer(CT)effect of *** results point that the kda-PLS method can transfer the PLS model developed on the primary instrument to the secondary ones,and achieve results comparable to the those of reestablishing a new PLS model on the secondary instrument,with R_(P)^(2)=0.9979(R_(P)^(2):coefficients of determination of the prediction set),RMSEP=0.0040(RMSEP:root mean square error of the prediction set),and MREP=3.03%(MREP:mean relative error of the prediction set).Therefore,kda-PLS will provide a new method for quantitative analysis of methanol content in methanol gasoline.

关键词： Kernel domain adaptive partial least squares(kda-PLS) Calibration transfer Methanol gasoline Near infrared spectroscopy

基于Raman光谱的3,5-二氨基-1,2,4-三唑(DAT)合成反应在线监测与反应机理探究——推荐一个仪器分析综合实验

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大学化学 2024年第6期39卷 303-311页

作者：张天龙张容玲汤宏胜李延李华西北大学化学与材料科学学院西安710127

本实验介绍了一个仪器分析综合性实验——基于Raman光谱的3,5-二氨基-1,2,4-三唑(DAT)合成的在线监测与反应机理探究。该实验是一个科研转化的仪器分析综合实验,内容包括DAT的合成、基于Raman光谱的合成反应过程在线监测以及合成反应机... 详细信息

本实验介绍了一个仪器分析综合性实验——基于Raman光谱的3,5-二氨基-1,2,4-三唑(DAT)合成的在线监测与反应机理探究。该实验是一个科研转化的仪器分析综合实验,内容包括DAT的合成、基于Raman光谱的合成反应过程在线监测以及合成反应机理解析。在实验中,采用化学计量学方法对Raman光谱数据进行处理和分析,以更深入地理解合成反应的机理。通过本实验,可以巩固学生的化学专业知识,提高学生的综合实验操作技能,激发学生对科学研究的兴趣,培养学生的科研探究能力。

关键词：拉曼光谱在线监测合成反应机理综合实验

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激光诱导击穿光谱(LIBS)分析虚拟仿真实验

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大学化学 2024年第6期39卷 295-302页

作者：张天龙周嘉俊汤宏胜宁晓辉李延李华西北大学化学与材料科学学院西安710127

虚拟仿真实验作为大型仪器分析实验教学模式的新兴趋势,有效地将虚拟仿真技术与实物仪器教学相结合,最大限度地提升了学生对于大型仪器分析的综合应用能力。本文以激光诱导击穿光谱(LIBS)虚拟仿真实验系统为例,完整地模拟了LIBS系统的... 详细信息

虚拟仿真实验作为大型仪器分析实验教学模式的新兴趋势,有效地将虚拟仿真技术与实物仪器教学相结合,最大限度地提升了学生对于大型仪器分析的综合应用能力。本文以激光诱导击穿光谱(LIBS)虚拟仿真实验系统为例,完整地模拟了LIBS系统的样品处理、光谱采集、定性分析和定量分析等实际实验场景,通过虚实结合实验教学模式对实验过程进行实时跟踪与综合考评。该实验有助于提高学生自主探究能力和创新意识,培养具有独立思考与实践能力的拔尖人才。

关键词：虚拟仿真实验激光诱导击穿光谱仪器分析实验自主性创造性

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点石成色:敦煌壁画的彩色世界

大学化学 2024年第6期39卷 238-245页

作者：张天龙张鑫媛赵星汤宏胜李延李华西北大学化学与材料科学学院西安710127 西北大学文化遗产学院西安710127

敦煌壁画,作为中国古代艺术的瑰宝,是一个丰富的历史、文化、艺术和宗教文化遗产宝库,其价值不可估量。这些壁画所用的颜料,皆为天然矿物精心挑选而成,它们为敦煌壁画带来了独一无二的色彩与质感。深入理解这些颜料的特性,有助于我们更... 详细信息

敦煌壁画,作为中国古代艺术的瑰宝,是一个丰富的历史、文化、艺术和宗教文化遗产宝库,其价值不可估量。这些壁画所用的颜料,皆为天然矿物精心挑选而成,它们为敦煌壁画带来了独一无二的色彩与质感。深入理解这些颜料的特性,有助于我们更好地欣赏艺术、文化和历史的深厚底蕴,也是壁画保护与修复的基础。本文采用生动拟人化的叙述方式,通俗易懂地描绘了莫高窟壁画的色彩来源,重点阐述了常用典型的矿物颜料及其来源,旨在促进壁画的保护工作,以及文化遗产的普及、宣传和传承。

关键词：敦煌壁画矿物颜料科普文物保护

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Large-Scale CRISPR Screen of LDLR Pathogenic Variants

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Research 2024年第2期2023卷 213-225页

作者： Mengjing Li Lerong Ma Yiwu Chen Jianing Li Yanbing Wang Wenni You Hongming Yuan Xiaochun tang hongsheng Ouyang Daxin Pang Key Lab for Zoonoses Research Ministry of EducationAnimal Genome Editing Technology Innovation CenterCollege of Animal SciencesJilin UniversityChangchunJilin Province 130062China The Institute of Translational Medicine Tianjin Union Medical Center of Nankai UniversityTianjin 300071China Chongqing ResearchInstitute Jilin UniversityChongqing 401123China Chongqing Jitang Biotechnology Research Institute Co.Ltd. ChongqingChina

Familial hypercholesterolemia(FH)is a frequently occurring genetic disorder that is linked to early-onset cardiovascular *** left untreated,patients with this condition can develop severe cardiovascular ***,many patients remain undiagnosed,and even when diagnosed,the treatment is often not *** mutations in the LDLR gene are the primary cause of FH,predicting whether novel variants are pathogenic is not a straightforward *** the functionality of LDLR variants is crucial in uncovering the genetic basis of *** study utilized CRISPR/Cas9 cytosine base editors in pooled screens to establish a novel approach for functionally assessing tens of thousands of LDLR variants on a large scale.A total of more than 100 single guide RNAs(sgRNAs)targeting LDLR pathogenic mutations were successfully screened with relatively high *** of these,5 sgRNAs were further subjected to functional verification studies,including 1 in the promoter,1 in the antisense RNA,1 in the exon,and 2 in the *** for the variant caused by the sgRNA located at intron 16,the functionalities of the other LDLR variants were all *** high similarity of LDLR intron sequences may lead to some false ***,these results confirm the reliability of the large-scale screening strategy for functional analysis of LDLR variants,and the screened candidate pathogenic mutations could be used as an auxiliary means of clinical gene detection to prevent FH-induced heart disease.

关键词： LDLR Screen straight

Antidepressant effects of Peiyuan Jieyu formula in a mouse model of chronic stress in conjunction with lipopolysaccharide-induced depression

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Journal of Traditional Chinese Medical Sciences 2024年第1期11卷 111-119页

作者： Qin tang Yu Li Tao Yang Xiaoxu Fan Lina Li hongsheng Chang School of Chinese Materia Medica Beijing University of Chinese MedicineBeijing 102488China Institute of Chinese Materia Medica China Academy of Chinese Medical SciencesBeijing 100700China Chinese Medicine Department Tianjin Institute of Pharmaceutical InspectionTianjin 300070China School of Chinese Medicine Beijing University of Chinese MedicineBeijing 102488China

Objective:To explore the mechanism of the Peiyuan Jieyu formula in treating depression by assessing its impact on a lipopolysaccharide-induced(LPS-induced)depression mouse ***:We created a mouse model of depression by exposing mice that had previously received chronic stress to intraperitoneal LPS *** mice were divided into the following groups:control,model,fluoxetine,Tiansi Yin,Sini powder,and low-,medium-,and high-dose Peiyuan Jieyu formula *** swim and tail suspension tests were used to assess the efficacy of the depression(despair)model,and weight gain rates were also ***,serum levels of various depression and inflammation-associated molecules,including tumor necrosis factor-a(TNF-a),interferon-γ(IFN-γ),tryptophan,5-hydroxytryptamine,kynurenine(KYN),and kynurenic acid(KA)were ***,the expression levels of ionic calcium-binding adaptor molecule-1(IBA-1)and indoleamine 2,3-dioxygenase(IDO)mRNA in hippocampal microglia were ***:The model group displayed greater despair-associated immobility,which was shortened in response to various doses of Peiyuan Jieyu ***,formula administration significantly reduced serum TNF-a levels and hippocampal IDO mRNA *** high formula dose also reduced IFN-γand IBA-1 levels,the latter was also decreased in response to the medium formula ***,the low formula dose reduced serum KYN level and KYN/tryptophan(TRP)and KYN/KA ***:The Peiyuan Jieyu formula holds immense potential in treating depression in a mouse model,potentially inhibiting inflammation and improving TRP-KYN metabolic disorders.

关键词： Peiyuan Jieyu formula Depression Chronic stress Lipopolysaccharide Inflammation Tryptophan pathway