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American Journal of Analytical Chemistry 2012年第12期3卷 779-789页

作者： Syed Ghulam Musharraf Aisha Bibi najia shahid Muhammad Najam-ul-Haq Momin Khan Muhammad Taha Uzma Rasool Mughal Khalid Mohammed Khan Department of Chemistry Bahauddin Zakariya University Multan Pakistan Hussain Ebrahim Jamal Research Institute of Chemistry International Center for Chemical and Biological Sciences University of Karachi Karachi Pakistan Panjwani Center for Molecular Medicine and Drug Research International Center for Chemical and Biological Sciences University of Karachi Karachi Pakistan

Matrix-assisted laser desorption/ionization (MALDI) is a preferred and widely used mass spectrometric technique for the analysis of macromolecules. Limited UV-LDI matrices are available for the analysis of biomolecules due to the restricted structural features to serve in the laser desorption/ionization mechanism with a problem of background signals appearing in the low mass region. This paper describes the application of Schiff base derivatives of acylhydrazide and isatin as alternate UV-LDI matrices for the analysis of peptides with significantly low background signals. Thirty one compounds have been successfully employed as matrices for the analysis of low molecular weight (LMW) peptides (α-Cyano-4-hydroxycinnamic acid (HCCA), a preferred choice for peptide analysis.

关键词： MALDI-MS LDI Matrix Acylhydrazide Schiff Bases Bis-Schiff Bases of Isatin Schiff Bases of Isatin Peptides

Pregnancy stressors and postpartum symptoms of depression and anxiety:the moderating role of a cognitivebehavioural therapy(CBT)intervention

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General Psychiatry 2024年第1期37卷 112-121页

作者： Yunxiang Sun Soim Park Abid Malik najia Atif Ahmed Zaidi Atif Rahman Pamela J Surkan Department of International Health Johns Hopkins University Bloomberg School of Public HealthBaltimoreMarylandUSA Department of Public Mental Health Health Services AcademyIslamabadPakistan Human Development Research Foundation RawalpindiPakistan Department of Primary Care and Mental Health Institute of Population HealthUniversity of LiverpoolLiverpoolUK

Background Little is known about the association between stressors(especially positive stressors)during pregnancy and postpartum depression and *** We investigated the association between positive and negative stress events during different stages of pregnancy and postpartum mental health outcomes among low-income pregnant women with symptoms of anxiety in Pakistan and evaluated whether an intervention based on cognitive behavioural therapy(CBT)had a regulatory *** Participants were 621 pregnant Pakistani women with mild *** the Pregnancy Experience Scale-Brief Version,six scores were created to assess positive and negative *** performed a multivariate linear regression to examine whether these six scores,measured both at baseline and in the third trimester,were associated with postpartum anxiety and depressive *** effect of the intervention on this relationship was examined by adding an interaction term to the regression *** Hassles frequency measured in the third trimester was positively associated with depression(B=0.22,95%confidence interval(Cl):0.09 to 0.36)and anxiety(B=0.19,95%Cl:0.08to 0.30).At the same timepoint,uplifts intensity was negatively associated with symptoms of depression(B=-0.82,95%Cl:1.46 to-0.18)and anxiety(B=-0.70,95%Cl:-1.25 to-0.15),whereas hassles intensity was positively related to symptoms of depression(B=1.02,95%Cl:0.36 to 1.67)and anxiety(B=0.90,95%Cl:0.34 to 1.47).The intensity ratio of hassles to uplifts reported in the third trimester was positively related to both depression(B=1.40,95%Cl:0.59 to 2.20)and anxiety(B=1.26,95%Cl:0.57 to 1.96).The intervention strengthened the overall positive effects of uplfts and the negative effects of *** experiences at baseline during early pregnancy to mid-pregnancy were not associated with mental health *** Stressors in the third trimester but not earlier in pregnancy were associated with postpartum symptoms

关键词： postpartum stress behaviour

Assessment of post-myocardial infarction lipid levels and management:Results from a tertiary care hospital of Pakistan

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World Journal of Cardiology 2024年第5期16卷 282-292页

作者： Rubina Rauf Muhammad Ismail Soomro Muhamman Nauman Khan Mukesh Kumar najia Aslam Soomro Khawar Abbas Kazmi Department of Preventive Cardiology National Institute of Cardiovascular DiseasesKarachi 75510Pakistan Department of Adult Cardiology National Institute of Cardiovascular DiseasesKarachi 75510Pakistan Department of Cardiology Liaquat National HospitalKarachi 74800Pakistan

BACKGROUND Lipid treatment practices and levels in post-acute myocardial infarction(AMI)patients,which are crucial for secondary *** To evaluate the lipid treatment practices and lipid levels in post-myocardial infarction(MI)patients at a tertiary care hospital in *** In this cross-sectional study,we analyzed patients who had experienced their first AMI event in the past 3 *** assessed fasting and non-fasting lipid profiles,reviewed statin therapy prescriptions,and examined patient *** recommended dose was defined as rosuvastatin≥20 mg or atorvastatin≥40 mg,with target total cholesterol levels set at<160 mg/dL and target low-density lipoprotein cholesterol(LDL-C)at<55 mg/*** Among 195 patients,71.3%were male,and the mean age was 57.1±10.2 *** median duration since AMI was 36(interquartile range:10-48)months and 60% were diagnosed with ST-segment elevation *** 13.8% of patients were advised to undergo lipid profile testing after AMI,88.7% of patients were on the recommended statin therapy,and 91.8% of patients were compliant with statin *** 11.5% had LDL-C within the target range and 71.7% had total cholesterol within the target *** admission in the past 12 months was reported by 14.4%,and the readmission rate was significantly higher among non-compliant patients(37.5%vs 5.6%).Subsequent AMI event rate was also significantly higher among non-compliant patients(43.8%vs 11.7%).CONCLUSION Our study highlights that while most post-AMI patients received the recommended minimum statin therapy dose,the inadequate practice of lipid assessment may compromise therapy optimization and raise the risk of subsequent events.

关键词： Lipid profile Dyslipidemia Acute myocardial infarction Secondary prevention Lipid lowering therapy

Investigating the implications of technological innovations,financial inclusion,and renewable energy in diminishing ecological footprints levels in emerging economies

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Geoscience Frontiers 2023年第6期14卷 341-357页

作者： najia Saqib Ilhan Ozturk Muhammad Usman Department of Finance College of Business AdministrationPrince Sultan UniversityRiyadhSaudi Arabia College of Business Administration University of SharjahSharjahUAE Faculty of Economics Administrative and Social SciencesNisantasi UniversityIstanbulTurkey School of Economics and Management and Center for Industrial EconomicsWuhan UniversityWuhan430072China

The correlation between technological innovation,economic growth,renewable energy,and ecological footprint carries significant policy implications for environmental ***,financial inclusion can drastically affect the technology-climate nexus across different countries and its moderating impacts have received sufficient *** do this,this study examined how technological innovation,financial inclusion,economic growth,and renewable energy affected emerging economies’ecological footprint from 1990 to ***,this study also scrutinizes the moderating role of financial inclusion with other regressors on ecological *** account for structural shifts,disguised cointegration,and numerous breaks in panel regression,this study applies advanced panel estimation methods for empirical *** estimated outcomes exhibit that the influence of technical innovation,climate technologies,and renewable energy significantly reduces the ecological footprint ***,economic growth and financial inclusion significantly increase the ecological footprint levels in the emerging ***,the integration of innovative technology and renewable energy in emerging countries mitigates the adverse effects of financial inclusion by making it easier for creative technologies and reducing ecological *** results show that emerging countries’innovative technology and renewable energy sources should be integrated with financial inclusion to enable longterm mitigation of environmental damages and sustainable *** on these estimated findings,the research recommends that emerging economies should hasten technological innovations along with stronger financial development to curtail ecological concerns without hindering the pace of sustainable economic growth.

关键词： Environmental-related technology Financial inclusion Renewable energy Ecological footprints Emerging countries

THE CONVERSION OF SYNGAS ON Fe／MnO Ⅰ.Effects of Metal Modificat

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催化学报 1996年第5期17卷 382-386页

作者： Guan najia DepartmentofChemistry NankaiuniversityTianjin3000 DepartmentofChemistry Nankaiu

Design and analysis of a recommendation system based on collaborative filtering techniques for big data

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Intelligent and Converged Networks 2023年第4期4卷 296-304页

作者： najia Khouibiri Yousef Farhaoui Ahmad El Allaoui STI Laboratory IDMT-IDMSFaculty of Sciences and Techniques ErrachidiaMoulay Ismail UniversityMeknes 5003Morocco

Online search has become very popular,and users can easily search for any movie title;however,to easily search for moving titles,users have to select a title that suits their ***,people will have difficulty choosing the film they want to *** process of choosing or searching for a film in a large film database is currently time-consuming and *** spend extensive time on the internet or on several movie viewing sites without success until they find a film that matches their *** happens especially because humans are confused about choosing things and quickly change their ***,the recommendation system becomes *** study aims to reduce user effort and facilitate the movie research ***,we used the root mean square error scale to evaluate and compare different models adopted in this *** models were employed with the aim of developing a classification model for predicting ***,we tested and evaluated several cooperative filtering *** used four approaches to implement sparse matrix completion algorithms:k-nearest neighbors,matrix factorization,co-clustering,and slope-one.

关键词： recommendation system machine learning collaborative filtering(CF) decision support system big data

基于GIS的泰州市夏季气象灾害风险区划分析

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科技资讯 2024年第12期22卷 186-189页

作者：田鹏飞包洋蔡娜佳邓孟珂江苏省气象局江苏南京210019 泰州市华云气象科技服务有限公司江苏泰州225300 泰州市气象局江苏泰州225300

利用泰州市1961—2012年逐日序列的历史气候资料与卫星遥感资料,综合考虑致灾因子、孕灾因子、承载体因子、防灾减灾因子,运用Logistic模型与MudFit模式,重点研究泰州市夏季气象灾害风险,综合分析了不同区域的风险水平差异,并进行风险... 详细信息

利用泰州市1961—2012年逐日序列的历史气候资料与卫星遥感资料,综合考虑致灾因子、孕灾因子、承载体因子、防灾减灾因子,运用Logistic模型与MudFit模式,重点研究泰州市夏季气象灾害风险,综合分析了不同区域的风险水平差异,并进行风险等级划分。结果表明:泰州市暴雨与高温灾害风险呈现出南高北低的格局,连阴雨的风险总体呈北高南低分布,大风灾害风险表现为海陵主城区、靖江市主城区等经济相对发达地区,灾害风险等级较高。

关键词：气象灾害风险 Logistic模型致灾因子评价模型

Enhanced CH4 yield by photocatalytic CO2 reduction using TiO2 nanotube arrays grafted with Au, Ru, and ZnPd nanoparticles

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Nano Research 2016年第11期9卷 3478-3493页

作者： Piyush Kar Samira Farsinezhad najia Mahdi Yun Zhang Uchenna Obuekwe Himani Sharma Jing Shen Natalia Semagina Karthik Shankar Department of Electrical and Computer Engineering University of Alberta 9107-116 Street Edmonton Alberta T6G 2V4 Canada Department of Chemical & Materials Engineering University of Alberta 9107-116 Street Edmonton Alberta T66 2V4 Canada NRC National Institute for Nanotechnology 11421 Saskatchewan Dr. NW Edmonton Alberta T6G 2M9 Canada

Metal nanoparticle （NP） co-catalysts on metal oxide semiconductor supports are attracting attention as photocatalysts for a variety of chemical reactions. Related efforts seek to make and use Pt-free catalysts. In this regard, we report here enhanced CH4 formation rates of 25 and 60 μmol·g^-1·h^-1 by photocatalytic CO2 reduction using hitherto unused ZnPd NPs as well as Au and Ru NPs. The NPs are formed by colloidal synthesis and grafted onto short n-type anatase TiO2 nanotube arrays （TNAs）, grown anodically on transparent glass substrates. The interfacial electric fields in the NP-grafted TiO2 nanotubes were probed by ultraviolet photoelectron spectroscopy （UPS）. Au NP-grafted TiO2 nanotubes （Au-TNAs） showed no band bending, but a depletion region was detected in Ru NP-grafted TNAs （Ru-TNAs） and an accumulation layer was observed in ZnPd NP-grafted TNAs （ZnPd-TNAs）. Temperature programmed desorption （TPD） experiments showed significantly greater CO2 adsorption on NP-grafted TNAs. TNAs with grafted NPs exhibit broader and more intense UV-visible absorption bands than bare TNAs. We found that CO2 photoreduction by nanoparticle-grafted TNAs was driven not only by ultraviolet photons with energies greater than the TiO2 band gap, but also by blue photons close to and below the anatase band edge. The enhanced rate of CO2 reduction is attributed to superior use of blue photons in the solar spectrum, excellent reactant adsorption, efficient charge transfer to adsorbates, and low recombination losses.

关键词： metal nanoparticles (NPs) TiO2 nanotube arrays(TNAs) colloidal synthesis band bending built-in potential photocatalytic CO2reduction semiconductorheterojunctions

2020~2022年贵州省临床实验室常规生化项目应用批长度Westgard西格玛规则的室内质量控制策略分析

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现代检验医学杂志 2024年第2期39卷 184-191页

作者：张淑俊袁薇孙建超杨敬源李梅张娜佳贵州医科大学公共卫生与健康学院环境污染与疾病监控教育部重点实验室贵阳561113 贵州省临床检验中心质量管理科贵阳550002 贵州省疾病预防控制中心贵阳550004

目的了解2020~2022年贵州省常规生化项目室内质量控制(internal quality control,IQC)情况,并运用分析批长度西格玛规则为常规生化项目选择恰当的IQC策略。方法从参加2020~2022年贵州省临床检验中心常规生化项目第一次室间质量评价(exte... 详细信息

目的了解2020~2022年贵州省常规生化项目室内质量控制(internal quality control,IQC)情况,并运用分析批长度西格玛规则为常规生化项目选择恰当的IQC策略。方法从参加2020~2022年贵州省临床检验中心常规生化项目第一次室间质量评价(external quality assessment,EQA)计划的实验室中筛选出统一采用英国朗道公司生产的两个浓度水平室内质控品的41家、41家和52家实验室,根据其IQC信息计算变异系数(coefficient of variation,CV),将CV与WS/T403-2012标准等不精密度性能规范进行比较,分析近年来贵州省常规生化项目的IQC情况;每年从中随机抽取15家回报三酰甘油项目结果的实验室并计算σ值,根据分析批长度Westgard西格玛规则流程图为其选择合适的质控策略,计算质量目标指数(quality goal index,QGI)以评价各实验室检测系统的分析性能。结果当月CV中,Ca,TP 2个项目满足WS/T403-2012标准的实验室比例较低,而P,CK,LDH等7个项目通过率均在80%以上,且呈逐年上升趋势;P,CK,LDH等7个项目符合生物医学变异(适当)性能规范的实验室比例均达90%,但Na,Ca,Cl等5个项目比例较低。累积CV中P,CK,LDH等10个项目满足生物医学变异(适当)性能规范的实验室比例在90%以上。对于三酰甘油项目,2020年~2022年分别有2家、5家、13家实验室达到6σ水平;与2020年和2021年相比,2022年σ值变化趋势上升(t=3.855,3.511,P≤0.001),表明这些实验室分析性能越来越好。结论贵州省部分常规生化项目的IQC水平在逐年提升。分析批长度Westgard西格玛规则为贵州省各实验室设计个性化质控规则,提高实验室的检测能力,更好地服务临床。

关键词：室内质量控制 Westgard西格玛规则质量目标指数质控规则

贵州省2019~2023年基层医疗机构与二级以上医疗机构常规生化项目室间质量评价结果分析

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标记免疫分析与临床 2024年第4期31卷 740-747页

作者：张淑俊袁薇孙建超杨敬源陶永德张娜佳贵州医科大学公共卫生与健康学院环境污染与疾病监控教育部重点实验室贵州贵阳561113 贵州省临床检验中心质量管理科贵州贵阳550002

目的通过分析贵州省2019~2023年基层医疗机构与二级以上医疗机构常规生化项目室间质量评价(external quality assessment,EQA)结果,了解影响各实验室检测准确度的因素,提高实验室检测能力。方法通过Clinet-EQA系统在线回报结果,收集2019... 详细信息

目的通过分析贵州省2019~2023年基层医疗机构与二级以上医疗机构常规生化项目室间质量评价(external quality assessment,EQA)结果,了解影响各实验室检测准确度的因素,提高实验室检测能力。方法通过Clinet-EQA系统在线回报结果,收集2019~2023年参加贵州省常规生化23个项目EQA的基层医疗机构实验室的EQA数据,分析各实验室的参评率及EQA合格率,并与二级及以上医疗机构实验室进行比较,进一步分析基层医疗机构与二级及以上医疗机构实验室之间的差距,找出影响结测结果准确度的原因并改进。结果基层医疗机构和二级及以上医疗机构参评单位数逐年增多,基层医疗机构56.52%的项目合格率总体均呈上升趋势。2021年CK项目和2022年DBIL项目基层医疗机构合格率高于二级及以上医疗机构(χ^(2)=17.24,36.77,P值均<0.05),2019~2023年中69.57%以上的常规生化项目二级及以上医疗机构合格率均高于基层医疗机构(χ^(2)=3.91~114.62,P值均<0.05),基层医疗机构实验室检测能力相对较差。结论基层医疗机构实验室仍是质量管理的薄弱环节,加强基层医疗机构实验室的质量管理对于提升基层实验室检测能力具有重大意义。

关键词：室间质量评价质量管理质量控制准确度检测能力