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对生态屏障概念内涵与价值的认识

山地学报 2005年第4期23卷 4431-4436页

作者：王玉宽孙雪峰邓玉林彭培好范建容中国科学院水利部成都山地灾害与环境研究所国家环保总局对外合作中心四川农业大学成都理工大学中国科学院水利部成都山地灾害与环境研究所四川成都610041 北京100035 四川雅安625000 四川成都610059

“生态屏障”概念源于我国生态环境建设实践。学术界对此概念的科学内涵和价值进行了有益的探讨,但目前还尚未形成统一的认识。本文通过对生态屏障概念的理论与实践基础的分析,在总结前人研究成果的基础上,提出了对生态屏障概念的新的... 详细信息

“生态屏障”概念源于我国生态环境建设实践。学术界对此概念的科学内涵和价值进行了有益的探讨,但目前还尚未形成统一的认识。本文通过对生态屏障概念的理论与实践基础的分析,在总结前人研究成果的基础上,提出了对生态屏障概念的新的认识和理解,认为生态屏障就是指“处于某一特定区域的生态系统,其结构与功能符合人类生存和发展的生态要求”。在此基础上对生态屏障的社会实践意义和科学价值进行了探讨,认为生态屏障概念提出的科学价值在于它丰富和拓展了生态系统生态学的内容,促进了恢复生态学理论的发展,同时对生态系统服务功能评价提出了新的要求;其社会实践意义表现在生态屏障概念的提出强调了人与生态环境的关系,明确了生态环境建设的目标;强调了区域性和时序性原则,为生态环境建设规划与实施提供了决策指南,为生态环境建设实践中实施系统工程和长远布局提出了更高的决策目标。

关键词：生态屏障内涵生态系统

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胃肠道间质瘤生物学特性临床病理分析

第四军医大学学报 2005年第6期26卷 F002-F002页

作者：任艳彩卫琮玲金家岩张君娜河南大学第一附属医院病理科河南大学医学院河南开封475001

目的: 探讨胃肠道间质瘤的临床病理特点,对预后做出客观评价.方法: 对 46例胃肠道间质瘤的形态学特征、生物学特性、免疫组化特点进行分析,并对部分病例作临床随访.结果: 胃肠道间质瘤胃比肠道多发, 5a生存率为 61 9%,属低度恶性肿瘤.... 详细信息

目的: 探讨胃肠道间质瘤的临床病理特点,对预后做出客观评价.方法: 对 46例胃肠道间质瘤的形态学特征、生物学特性、免疫组化特点进行分析,并对部分病例作临床随访.结果: 胃肠道间质瘤胃比肠道多发, 5a生存率为 61 9%,属低度恶性肿瘤.免疫组化表型为CD34+,CD117+.结论: 胃肠道间质瘤的良恶性不能依据形态学指标定,肿瘤大小和核分裂数、肿瘤性坏死在判断良恶性时有重要参考价值.

关键词：胃肠道间质瘤生物学免疫组化

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活性炭的制备及应用研究进展

炭素技术 2003年第3期22卷 29-33页

作者：魏娜赵乃勤贾威王哲仁韩森天津大学材料科学与工程学院天津300072 天津大学一碳化工国家重点实验室天津300072

综述了国内外近年来活性炭的制备及应用研究的动态,分析了不同制备方法的活化机理及其对活性炭性能的影响,并对活性炭在21世纪社会发展中的重要作用作了展望。

关键词：活性炭活化方法活化机理应用

日本血吸虫单克隆抗独特型抗体NP30对虫卵肉芽肿免疫调节作用的研究

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中国血吸虫病防治杂志 2000年第4期12卷 193-197页

作者：冯振卿朱荣李玉华仇镇宁李芸茜冷静薛婉芬吴观陵管晓虹南京医科大学病理学教研室南京210029 南京医科大学寄生虫学教研室

目的研究日本血吸虫单克隆抗独特型抗体ＮＰ３０对虫卵肉芽肿的影响。方法ＮＰ３０腹腔注射主动免疫ＩＣＲ小鼠，对照组腹腔注射ＳＰ２／０腹水，分别在尾蚴攻击感染后第４、８、１２、１６、２０、２４周处死，观察和比较肝内虫卵肉... 详细信息

目的研究日本血吸虫单克隆抗独特型抗体ＮＰ３０对虫卵肉芽肿的影响。方法ＮＰ３０腹腔注射主动免疫ＩＣＲ小鼠，对照组腹腔注射ＳＰ２／０腹水，分别在尾蚴攻击感染后第４、８、１２、１６、２０、２４周处死，观察和比较肝内虫卵肉芽肿的形成和演变。应用计算机图像分析技术，测量虫卵肉芽肿大小。结果尾蚴攻击感染第１２周以后，ＮＰ３０免疫组虫卵肉芽肿的直径明显低于ＳＰ２／０对照组，虫卵肉芽肿的演变时相提前，并出现２种特殊类型的肉芽肿。结论ＮＰ３０能减轻日本血吸虫对宿主造成的免疫病理损害。

关键词：日本血吸虫单克隆抗独特型抗体虫卵催芽肿

Parathyroid ultrasonography and bone metabolic profile of patients on dialysis with hyperparathyroidism

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World Journal of Nephrology 2016年第5期5卷 437-447页

作者： cláudia Ribeiro Maria Goretti Moreira Guimaraes Penido Milena Maria Moreira Guimaraes Marcelo de Sousa Tavares Bruno das Neves Souza Anderson Ferreira Leite Leonardo Martins Caldeira de Deus Lucas Joséde Campos Machado Center of Nephrology Santa Casa de Belo Horizonte HospitalBelo Horizonte CEP 30150320Minas GeraisBrazil Pediatric Nephrology Unit School of MedicineFederal University of Minas GeraisBelo Horizonte CEP 30130100Minas GeraisBrazil Pediatric Nephrology Unit Center of NephrologySanta Casa de Belo Horizonte HospitalBelo Horizonte CEP 30150320Minas GeraisBrazil Department of Internal Medicine School of Medic Federal University of Minas GeraisBelo Horizonte C30130100Minas GeraisBrazil School of Medicine Federal University of Minas GeraisBelo Horizonte CEP 30130100Minas GeraisBrazil Department of Cardiology Clinic HospitalFederal University of Minas GeraisBelo Horizonte CEP 30130100Minas GeraisBrazil

AIM To evaluate the parathyroid ultrasonography and define parameters that can predict poor response to treatment in patients with secondary hyperparathyroidism due to renal *** This cohort study evaluated 85 patients with chronic kidney disease stage V with parathyroid hormone levels above 800 pg/mL. All patients underwent ultrasonography of the parathyroids and the following parameters were analyzed: Demographic characteristics(etiology of chronic kidney disease, gender, age, dialysis vintage, vascular access, use of vitamin D), laboratory(calcium, phosphorus, parathyroid hormone, alkaline phosphatase, bone alkaline phosphatase), and the occurrence of bone changes, cardiovascular events and death. The χ~2 test were used to compare proportions or the Fisher exact test for small sample frequencies. Student t-test was used to detect differences between the two groups regarding continuous *** Fifty-three patients(66.4%) had parathyroid nodules with higher levels of parathyroid hormone, calcium and phosphorus. Sixteen patients underwent parathyroidectomy and had higher levels of phosphorus and calcium × phosphorus product(P = 0.03 and P = 0.006, respectively). They also had lower mortality(32% vs 68%, P = 0.01) and lower incidence of cardiovascular or cerebrovascular events(27% vs 73%, P = 0.02). Calcium × phosphorus product above 55 mg^2/dL^2 [RR 1.48(1.06, 2.08), P = 0.03], presence of vascular calcification [1.33(1.01, 1.76), P = 0.015] and previous occurrence of vascular events [RR 2.25(1.27, 3.98), P < 0.001] were risk factors for mortality in this population. There was no association between the occurrence of nodules and *** The identification of nodules at ultrasonography strengthens the indication for parathyroidectomy in patients with secondary hyperparathyroidism due to renal failure.

关键词： Secondary hyperparathyroidism Parathyroid ultrasonography Calcium Phosphorus Parathyroid hormone Alkaline phosphatase Chronic kidney disease Bone alkaline phosphatase

Streptococcus agalactiae:Sensitivity profile in pregnant women attending health units in northeastern Brazil

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World Journal of Obstetrics and Gynecology 2020年第1期9卷 11-17页

作者： Tais Viana Ledo de Oliveira Fabrícia Almeida Fernandes Santana Caline Novais Teixeira Oliveira Maria Luísa Cordeiro Santos Fabrício Freire de Melo cláudio Lima Souza Márcio Vasconcelos Oliveira Instituto Multidisciplinar em Saúde Universidade Federal da BahiaVitória da Conquista 45029-094BahiaBrazil

BACKGROUNDG roup B Streptococcus agalactiae (GBS) is the main etiologic agent associated withearly-onset neonatal sepsis, and of all newborns of parturients colonized by GBS,approximately 1%-2% develop invasive, early-onset disease. The risk of infectionincreases to 15.2% in premature neonates, to 10.7% when the parturient haschorioamnionitis or premature rupture of membranes for more than 24 h and to9.7% if the mother has postpartum bacteremia. In addition to causing perinatal,neonatal and postnatal deaths, neonatal hospital infection is associated with highcosts, as hospitalization is three times longer than in uninfected children. Theidentification of pregnant women colonized by GBS, through universal screening,associated with the adoption of appropriate antibiotics at the time of delivery arethe most successful preventive *** evaluate the sensitivity profile of GBS isolated from pregnant womenattending Vitória da *** This is a cross-sectional study with a quantitative approach carried out in themunicipality of Vitória da Conquista-Bahia between February 2017 and March2018. The study population was composed of 210 pregnant women, with agestational age of 32 to 40 wk, who were aged 18 years or older living in the urbanarea of the municipality of Vitória da Conquista. After a brief explanation aboutthe research and obtaining a signed an informed consent form, data andvaginorectal swabs were collected from the women for GBS research. Examinationof the samples in order to identify the presence of GBS was by culture on sheep blood agar and chromogenic agar for GBS and then, seeded on plates containingstreptococcal culture medium and incubated for 18 h to 24 h at 35°C. Theantimicrobial sensitivity profile of positive GBS samples was determined by thedisk diffusion technique, according to the clinical and Laboratory StandardsInstitute manual (2017). The data obtained were stored in a database usingMicrosoft Office Excel spreadsheets and a des

关键词： Streptococcus agalactiae Sensitivity profile Pregnancy clindamycin Erythromycin Group B streptococcal disease

Prevalence of anal human papillomavirus infection in patients with human immunodeficiency virus infection:A systematic review

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World Journal of clinical Infectious Diseases 2021年第3期11卷 38-48页

作者： Cinara Dourado Pereira Correia Santos Caio Caires Brandão Fernanda Santos Mota Isis Souza Ferreira Caline Novais Teixeira Oliveira cláudio Lima Souza Fabrício Freire de Melo Márcio Vasconcelos Oliveira Instituto Multidisciplinar em Saúde Universidade Federal da BahiaVitória da Conquista 45029-094BahiaBrazil Medical School Faculdade Santo AgostinhoVitória da Conquista 45028-100BahiaBrazil

BACKGROUND Human papillomavirus(HPV)is one of the most common sexually transmitted viruses *** To analyze the prevalence of HPV infection in human immunodeficiency virus(HIV)-positive patients and the risk factors associated with this infection through a review of studies published in the period from January 2010 to April *** A total of 384 articles were initially identified in our searches,of which ten were selected according to previously defined eligibility *** Anal intercourse,absence of condom use,multiple partners,other specific sexual and life habits,and HIV infection are among the risk factors associated with anal HPV *** In general,there is a higher prevalence of anal HPV infection among HIV-positive patients,mostly in individuals over 30 years old,those with multiple partners,those who had an early homosexual debut,and cigarette,alcohol,and drug users.

关键词： Human immunodeficiency virus Anal human papillomavirus Risk factors Systematic review

体位性低血压与心血管预后及不良事件:来自收缩压干预试验的结果

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中华高血压杂志(中英文) 2020年第2期 199-199页

作者： Juraschek SP Taylor AA Jr JTW Evans GW Miller ER Plante TB Cushman WC Gure TR Haley WE Moinuddin I Nord J Oparil S Pedley C Roumie cl Whittle J Wiggers A Finucane C Kenny RA Appel LJ Townsend RR 赵狄刘莉 SPRINT research group

体位性低血压(orthostatic hypotension, OH)在高血压治疗中经常发生,但它对不良预后的影响并不明确。收缩压干预试验(systolic blood pressure intervention trial,SPRINT)是一个成人随机试验,参加者年龄>50岁、伴心血管病高风险且坐... 详细信息

体位性低血压(orthostatic hypotension, OH)在高血压治疗中经常发生,但它对不良预后的影响并不明确。收缩压干预试验(systolic blood pressure intervention trial,SPRINT)是一个成人随机试验,参加者年龄>50岁、伴心血管病高风险且坐位收缩压130～180 mm Hg(1 mm Hg=0.133 kPa),立位收缩压≥110 mm Hg。参加者收缩压降压靶目标随机分为<1

关键词：收缩压干预试验体位性低血压不良事件

云南省西南地区4个口岸黄胸鼠种群遗传特性分析

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中国媒介生物学及控制杂志 2020年第4期31卷 451-456页

作者：刘莹莹曹晓梅慈颖杨燕卢云兰张晓龙方志强中国检验检疫科学研究院卫生检验与检疫研究所北京100176 云南国际旅行卫生保健中心云南昆明650228

目的掌握云南省4个口岸地区(金水河、磨憨、清水河、姐告)黄胸鼠种群遗传多样性和亲缘关系。方法对2014-2015年在4个口岸地区捕获的55只黄胸鼠进行解剖,取其肝脏组织进行基因组DNA提取。应用PCR技术分析其线粒体DNA细胞色素b(Cytb)基因... 详细信息

目的掌握云南省4个口岸地区(金水河、磨憨、清水河、姐告)黄胸鼠种群遗传多样性和亲缘关系。方法对2014-2015年在4个口岸地区捕获的55只黄胸鼠进行解剖,取其肝脏组织进行基因组DNA提取。应用PCR技术分析其线粒体DNA细胞色素b(Cytb)基因,通过生物信息学分析软件(clustal X 2.0和MEGA 7.0)分析Cytb基因序列。计算Cytb基因序列的核苷酸、密码子组成以及使用频率,分析遗传距离并采用邻接法(Neighbour-Joining,NJ)构建系统进化树。结果 Cytb基因序列中碱基组成A+T约占59.77%,C+G约占40.23%。密码子UCA、CUA、CCA的使用频率分别为3.19%、3.11%和3.09%。姐告和清水河口岸黄胸鼠Cytb基因的遗传距离为0.000;金水河与清水河、姐告口岸黄胸鼠Cytb基因的遗传距离均为0.008。以小家鼠、褐家鼠为外群构建NJ进化树,清水河与姐告聚为一支,其次与磨憨,最后与金水河聚为一支。结论 Cytb基因序列中A+T含量明显高于C+G含量,黄胸鼠Cytb基因可能存在A+T偏倚性。遗传距离和NJ进化树分析表明清水河与姐告口岸黄胸鼠亲缘关系较近,其次是与磨憨黄胸鼠;金水河黄胸鼠与其他3个口岸黄胸鼠的亲缘关系较远。

关键词：云南口岸黄胸鼠细胞色素b基因