检索结果-南通市图书馆

通过聚阳离子取代策略实现压缩黄铜矿型硒化物[Rb3BaCl][In_(8)Se_(14)]以获得优异的非线性光学性能

在线全文

学校读者我要写书评

暂无评论

Science China Materials 2024年第6期67卷 2000-2007页

作者：吴帆陈文发吴子璇姜小明刘彬文郭国聪 State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China College of Chemistry and Materials Science Fujian Normal UniversityFuzhou 350007China Fujian Science&Technology Innovation Laboratory for Optoelectronic Information of China Fuzhou 350108China University of Chinese Academy of Sciences Beijing 100049China Fujian College University of Chinese Academy of SciencesFuzhou 350002China

单价Ag+或Li+引入到类金刚石结构的MQ22-(M=ga,In;Q=S,Se)阴离子基团中能合成出良好的二阶非线性光学(NLO)晶体材料.然而,这些晶体分别面临着较低的抗激光损伤阈值(LIDT)或二氧化硅易被腐蚀等缺点,严重限制了其在高功率激光应用中的实用... 详细信息

单价Ag+或Li+引入到类金刚石结构的MQ22-(M=ga,In;Q=S,Se)阴离子基团中能合成出良好的二阶非线性光学(NLO)晶体材料.然而,这些晶体分别面临着较低的抗激光损伤阈值(LIDT)或二氧化硅易被腐蚀等缺点,严重限制了其在高功率激光应用中的实用性.在本研究中,基于类金刚石结构的ZnSe,我们采用[Se_(4)Zn_(13)]Se_(2)4→[ClRb_(3)Ba]Se_(24)非常规的聚阳离子取代策略,设计并合成了一种新型的盐包硫属化合物[Rb_(3)BaCl][In_(8)Se_(14)](1).化合物1属于压缩黄铜矿型硒化物并保持了与AgInSe_(2)相同的晶体对称性(I-42d空间群).值得注意的是,由于InSe_(4)四面体结构单元的平行排列,化合物1具有相位匹配的强二次谐波(SHG)响应(2.0倍于AggaS_(2)@2.90μm).此外,聚阳离子[Rb_(3)BaCl]^(4+)的引入促进了光学带隙(2.02 eV)的增强,有效地避免了对2.09μm激光的双光子吸收;同时结合较低的热膨胀系数,使得化合物1表现出高的LIDT(3.2倍于AggaS2@2.09μm).本研究验证了在类金刚石结构中进行聚阳离子取代的可行性,并成功获得了性能优异的中远红外NLO材料.

关键词： chalcogenide nonlinear optical material substitution strategy diamond-like structure structure-property relationship

Epidemiological, Clinical, Therapeutic, and Evolutionary Aspects of Chronic End-Stage Renal failure in the Nephrology Department of the University Hospital of Brazzaville in 2023

在线全文

学校读者我要写书评

暂无评论

Open Journal of Nephrology 2024年第1期14卷 62-69页

作者： gaël Honal Mahoungou Daniel Tony Eyeni Sinomono Éric Ngandzali-Ngabé Soraya Ntandou Francky Ambounou Précieux Ngoma Berline Ndinga Dalhia Mboungou Héléna Botokoto Bothard Hardy Ibovi Richard Loumingou faculty of Health Sciences Marien Ngouabi University Brazzaville Congo Department of Nephrology University Hospital of Brazzaville Brazzaville Congo

Objective: Chronic end-stage renal failure is a major public health problem in developing countries and is poorly documented. The objective of this study was to describe the epidemiological, diagnostic, therapeutic, and evolutionary aspects of patients admitted for end-stage renal failure to the Department of Nephrology at the University Hospital of Brazzaville. Patients and Methods: This was a descriptive cross-sectional study collecting prospective data that took place over 10 months. We included 128 patients who were exhaustively identified. Sociodemographic, clinical, therapeutic and developmental data were collected using a standardized and pretested pre-established survey form. The EPI info software enabled the analysis and processing of the data. Results: We reported a male predominance with a sex ratio of 2.5. The median age was 50 years. The first cause found was diabetes (55%) followed by hypertension (46%). The majority of patients had a dialysis emergency and half could not be dialyzed for financial reasons. Conclusion: Our results highlighted that certain epidemiological parameters of end-stage renal failure are constantly changing, such as frequency, while others remain static, including the main etiologies, gender, and age. However, mortality continues to increase and deserves more attention.

关键词： ESRD Epidemiology Nephrology University Hospital of Brazzaville

Evolution of Mother-to-Child HIV-1 Transmission Rate in Mali from 2009 to 2018

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Advances in Microbiology 2024年第5期14卷 256-267页

作者： Alou Sanogo Mohamed Ag Baraïka Maïga Aminata Demba Koita Mahamadou Abdou Mamadou Guindo Clémentine N’Diaye fatoumata Namoudou Traoré Abdoulaye Bagayoko Youssouf Diallo Flabou Bougoudogo Ibrehima Guindo National Institute for Public Health Bamako Mali faculty of Pharmacy (faPH) University of Science of Technical and Technology de Bamako Bamako Mali University Hospital Center (CHU)-Point G Bamako Mali faculty of Medecine and Odonto-Stomatology University of Science of Technical and Technology de Bamako Bamako Mali Sector Unit for the Fight against AIDS Tuberculosis and Hepatitis Bamako Mali UNICEF (United Nations Children’ s Fund) Bamako Mali

Despite enormous efforts to achieve the goal of eliminating mother-to-child transmission of HIV-1, it remains a major challenge for many countries in sub-Saharan Africa, particularly Mali. Our objective is to assess changes in the rate of mother-to-child transmission of HIV-1. We conducted a cross-sectional study between January 1, 2009 to December 31, 2018 (10 years) of early diagnosis activity in newborns and children born to HIV-1-positive mothers at the National Institute for Public Health (INSP). The samples came from health and referral centers in mali. All samples were received at the Laboratory of Molecular Biology at the INSP. Proviral DNA extraction was performed from a blood spot sample with a Roche DNA kit, Cobas AmpliPrep/Cobas TaqMan HIV-1 qualitative Test, V2.0 (Roche Molecular System, Inc, USA) following the company procedures. Molecular diagnosis was performed using the same kits using an algorithm of three identical PCRs. The Epi Info version 7 software was used for data analysis with a significance threshold of 5%. A total of 10,714 samples of infants and children born to HIV-positive mothers were analyzed by PCR. Ninety-six percent of mothers were on ARV prophylaxis (AZT 3TC NVP and AZT NVP) and 60% of newborns received the same ARV prophylaxis. Of these children, 956 tested positive with an overall transmission rate of 8.92%, varying between 7.27% in 2009 and 08.01% in 2018. This rate was relatively low among children receiving prophylaxis at 2.04% and remained high for children who received breastfeeding at 5.62%. However, the transmission rate remains low for those who have benefited from mixed and artificial breastfeeding at 1.58% and 1.27% respectively. A significant proportion of children remained infected by their mothers during pregnancy, childbirth or breastfeeding. This study shows the importance of early diagnosis of HIV in children using molecular technology.

关键词： Early Diagnosis Mothers-to-Child Newborns PCR DNA HIV-1

A Note on Solutions for Asymptotically Linear Elliptic Systems

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta Mathematicae Applicatae Sinica 2008年第3期24卷 511-522页

作者： Lei-ga Zhao Department of Mathematics Beijing University of Chemical Technology 100029 Beijing China Academy of Mathematics and Systems Science Chinese Academy of Sciences Beijing 100190 China Department of Mathematics Yunnan Normal University Kunming 650092 China

In this paper, we are concerned with the elliptic system of{ -△u＋V（x）u=g（x,v）, x∈R^N, -△v＋V（x）v=f（x,u）, x∈R^N, where V（x） is a continuous potential well, f, g are continuous and asymptotically linear as t→∞. The existence of a positive solution and ground state solution are established via variational methods.

关键词： Elliptic system ground state solution variational methods concentration-compactness principle

农村人居环境质量满意度及其影响因素研究——基于183村1362份农户调查数据的分析

在线全文

学校读者我要写书评

暂无评论

生态经济 2024年第3期40卷 210-214页

作者：韩振罗尔呷刘合光中国农业科学院农业经济与发展研究所北京100081 浙江大学中国农村发展研究院浙江杭州310007

改善农村人居环境是实施乡村振兴战略的必然要求,探讨人居环境质量满意度的影响因素具有重要的现实意义。论文基于全国183村1362份农户的调查数据,分析农村居民对于人居环境满意度的影响因素,重点关注村级人居硬环境和软环境的影响。研... 详细信息

改善农村人居环境是实施乡村振兴战略的必然要求,探讨人居环境质量满意度的影响因素具有重要的现实意义。论文基于全国183村1362份农户的调查数据,分析农村居民对于人居环境满意度的影响因素,重点关注村级人居硬环境和软环境的影响。研究结论表明:村级人居软环境质量是影响农村居民满意度的主要因素,经济状况、社会监督、外出务工经历以及区域位置等因素也会影响居民的满意度。未来在优化农村人居环境的过程中,一方面要因村施策,整治农村人居“软环境”和“硬环境”,重点解决农村人居环境的短板问题;另一方面,需要挖掘区域的发展潜力,激发农户的内生动力,从整体上提升村庄的经济水平,进而助力于提升人居环境质量,实现乡村振兴。

关键词：农村人居环境乡村振兴满意度经济水平软环境

Author correction to“gas-propelled nanomotors alleviate colitis through the regulation of intestinal immunoenvironmenthematopexis-microbiota circuits”[Acta Pharm Sin B 14(2024)2732e2747]

在线全文

学校读者我要写书评

暂无评论

Acta Pharmaceutica Sinica B 2024年第9期14卷 4193-4193页

作者： Bo Xiao Yuqi Liang ga Liu Lingshuang Wang Zhan Zhang Libin Qiu Haiting Xu Sean Carr Xiaoxiao Shi Rui LReis Subhas CKundu Zhenhua Zhu Department of gastroenterology the First Affiliated Hospital of Nanchang UniversityNanchang 330006China College of Sericulture Textileand Biomass SciencesSouthwest UniversityChongqing 400715China Department of Neurology School of MedicineEmory UniversityAtlantaGA 30322USA Atlanta Veterans Affairs Medical Center DecaturGA 30033USA Department of Surgery School of MedicineEmory UniversityAtlantaGA 30322USA 3Bs Research Group I3Bs d Research Institute on BiomaterialsBiodegradables and BiomimeticsUniversity of MinhoHeadquarters of the European Institute of Excellence on Tissue Engineering and Regenerative MedicineAveParkBarcoGuimaraes 4805-017Portugal

The authors regret that there are errors in the author information and author *** name of the corresponding author,Zhenghua Zhu,should be corrected to Zhenhua *** modification does not affect the results of the *** au... 详细信息

关键词： journal correction contributions

虚拟电厂网络安全风险评估指标体系构建及量化计算

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

中国电力 2024年第8期57卷 130-137页

作者：杨珂王栋李达张王俊向尕李军国网数字科技控股有限公司北京100053 国网区块链科技(北京)有限公司北京100053 国网区块链应用技术实验室北京100053 国网上海市电力公司上海200122 北京信息科技大学北京100192

提出了静态与动态风险评估相结合的多维动态网络安全风险评估指标体系。基于虚拟电厂的特点进行网络安全风险分析,构筑多维静态风险评估指标。基于攻击路径演化机理,对信息侧、物理侧和信息-物理侧进行数据采集,构筑动态风险评估指标。... 详细信息

提出了静态与动态风险评估相结合的多维动态网络安全风险评估指标体系。基于虚拟电厂的特点进行网络安全风险分析,构筑多维静态风险评估指标。基于攻击路径演化机理,对信息侧、物理侧和信息-物理侧进行数据采集,构筑动态风险评估指标。提出指标量化计算方法。通过仿真实验验证本文所提的指标体系及量化计算方法能够有效评估安全性,识别风险隐患,提出有效的加固措施。

关键词：虚拟电厂公网与专网互动风险评估指标体系

Epidemiological and Clinical Profile and Immediate Outcome of Neonates Transferred from the Maternity Unit to the Neonatology Unit of the CSREF in Commune V of Bamako District, Mali

在线全文

学校读者我要写书评

暂无评论

Open Journal of Pediatrics 2024年第3期14卷 547-557页

作者： Maimouna Kante Ya Traoré Balilé Harber Beydari Mamadou Traoré Issiaka Koné Diéneba Sacko Maimouna Haidara Korotoumou Bamba Assitan farota Abdoulaye Kassogué Mohamed Diarra Dramane Touré Abdoul Salam Diarra Leyla Maïga Dicko fatoumata Paediatric Ward CSR&#233f CV Bamako Mali Paediatric Ward of Nianankoro Fomba Hospital S&#233gou Mali Paediatric Ward of Kalaban CoroCSREF Bamako Mali Pediatric Department of the Mopti Reference Health Center Mopti Mali National Centre for Scientific and Technological Research Bamako Mali Paediatrics Department Mohamed VI Perinatal Clinic Bamako Mali Department of Paediatrics Gabriel Tour&#233 University Hospital Bamako Mali

Introduction: Neonatal mortality remains a major public health concern. According to the World Health Organisation (WHO), the number of newborns dying each year has fallen from 5 million in 1990 to 2.4 million in 2019. The aim of our study was to describe the main morbid conditions and their lethality in newborns admitted to the paediatric ward of the CSREF in Commune V. Methodology: We conducted a 12-month prospective descriptive and analytical study from August 2020 to July 2021. Results: During the 12 months of the study, out of 2654 neonates admitted to hospital, 216 met our inclusion criteria, i.e. 8%. Newborns admitted in the first few hours of life represented 99.54% of cases. Full-term newborns accounted for 65.74% of the total. Forty-eight percent of newborns had hypothermia on admission. The most common diagnosis was asphyxia in 55.56% of cases, followed by neonatal infection in 27.78% and prematurity in 10.65%. Death was recorded in 22.2% of cases. Asphyxia was the main cause of neonatal death, followed by prematurity in our context. Conclusion: Improving the prognosis of newborn babies will require a thorough understanding of neonatal pathologies and the implementation of a pre- and perinatal prevention policy.

关键词： Newborns Morbidity Mortality

微波消融治疗继发性甲状旁腺功能亢进症后早期低钙血症的影响因素

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

中国医学影像技术 2024年第9期40卷 1327-1331页

作者：吴家昊李春刘志兴刘旮吕佳杰南昌大学第一附属医院超声医学科江西南昌330000

目的观察微波消融(MWA)治疗继发性甲状旁腺功能亢进症(SHPT)后早期低钙血症的影响因素。方法回顾性分析82例接受MWA治疗的SHPT患者,根据MWA后早期有无低钙血症将其分为低钙组(n=36)与非低钙组(n=46)。比较组间患者年龄、性别、体质量指... 详细信息

目的观察微波消融(MWA)治疗继发性甲状旁腺功能亢进症(SHPT)后早期低钙血症的影响因素。方法回顾性分析82例接受MWA治疗的SHPT患者,根据MWA后早期有无低钙血症将其分为低钙组(n=36)与非低钙组(n=46)。比较组间患者年龄、性别、体质量指数(BMI)、透析方式、透析时间、病灶数目,以及基线血钙、血磷、全段甲状旁腺激素(iPTH)、碱性磷酸酶(ALP)、血红蛋白、白蛋白、肌酐、尿素、25-羟维生素D_(3);行logistic分析,筛选MWA后早期低钙血症的影响因素。结果组间透析方式、病灶数目、血钙、iPTH及ALP差异均有统计学意义(P均<0.05)。单因素及多因素logistic回归分析结果显示,病灶数目、iPTH及ALP为MWA治疗SHPT后早期低钙血症的独立影响因素(P均<0.05)。结论病灶数目、iPTH及ALP为MWA治疗SHPT后早期低钙血症的影响因素。

关键词：甲状旁腺功能亢进症,继发性低钙血症消融技术超声检查