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Oxygen Permeability of Polypropylene Containing Polyisobutene with Magnesium Acetate

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International Journal of Minerals,Metallurgy and Materials 2000年第2期14卷 118-121页

作者： Wei Tian Raymond T. Woodhams(Material Science and Engineering School, University of Science and Technology Beijing, Beijing 100083, China)(Dept. of Chemical Engineering and Applied Chemistry, University of Toronto, Torono M5S ia4, Canada) Material Science and Engineering School University of Science and Technology Beijing Beijing 100083 China Dept. of Chemical Engineering and Applied Chemistry University of Toronto Toronto Ont. M5S IA4 Canada

The oxygen permeabilities of polypropylene films are reduced by adding a minor percentage of a polyisobutene ionomer. The polyisobutene ionomers were prepared by in situ salt exchange of magnesium acetate with maleated polyisobutenes of commercially available low relative molecular mass. The more polar magnesiurn salts aided phase separaion during crystallization from the molten polypropylene mixtusre. Scanning electron microscope photographs revealed that the polyisobotene ionomer is largely concentratd in the amorphous regions between the polypropylene spherulites, where the ionomer tends to concentrate during crystallization. The influence of the polyisobutene ionomer on the oxygen permeability of polypropylene was found to be slightly dependent upon the relative molecular mass of the polyisobutene precursor. Under optimum conditions, the oxygen permeability of polypropylene is reduced by 20%with only 1% additive.

关键词： oxygen permeability polypropylene polyisobutene

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基于附加阻尼的微网改进下垂控制方法

电力系统自动化 2015年第18期39卷 25-30页

作者：张野郭力贾宏杰智能电网教育部重点实验室天津大学天津市300072

采用传统有功频率、无功电压幅值下垂控制时,若下垂系数选取不合理,逆变器输出功率会出现持续振荡,当微网离网运行时,逆变器输出功率的振荡会导致微网系统频率出现波动,严重时会使整个系统出现功角稳定性问题。文中基于储能逆变器动态... 详细信息

采用传统有功频率、无功电压幅值下垂控制时,若下垂系数选取不合理,逆变器输出功率会出现持续振荡,当微网离网运行时,逆变器输出功率的振荡会导致微网系统频率出现波动,严重时会使整个系统出现功角稳定性问题。文中基于储能逆变器动态频率特性的概念,根据其产生正阻尼作用的相位条件和幅值条件,提出了基于附加阻尼的改进下垂控制方法。该方法可以在不影响系统稳态频率和逆变器输出功率的前提下,有效地增加系统的阻尼,从而抑制逆变器输出功率振荡,提高系统的稳定性。最后通过PSCAD仿真,验证了所提控制策略的有效性。

关键词：微网(微电网) 下垂控制动态频率特性储能逆变器附加阻尼小信号模型

Effects of the use of bioceramic wraps in patients with lower limb venous ulcers:A randomized double-blind placebo-controlled trial

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Journal of Integrative Medicine 2020年第1期18卷 26-34页

作者： Gerli E.G.Herr Fábio Goulart da Silva Francisco Jose Cidral-Filho Fabricia Petronilho Lucinéia Gainski Danielski Mariana Pereira de Souza Goldim Afonso Shiguemi Inoue Salgado Franciane Bobinski Daniel Fernandes Martins Eliane R.Winkelmann Integral Health Care Regional University of the Northwest of the State of Rio Grande do Sul(UNIJUí)and University of Cruz Alta(UNICRUZ)Ijuí98700-000RSBrazil Experimental Neuroscience Laboratory(LaNEx) University of Southern Santa CatarinaPalhoca 88137-270SCBrazil Laboratory of Neurobiology of Inflammatory and Metabolic Processes University of Southern Santa CatarinaTubarao 88704-900SCBrazil Integrative Physical Therapy Residency Philadelphia University CenterLondrina 86020-000PRBrazil Laboratory of Exercise Physiopathology Department of Life Sciences(DCVida)Regional University of the Northwest of the State of Rio Grande do Sul(UNIJUí)Ijuí98700-000RSBrazil

Background:Venous ulcer represents the most advanced stage of chronic venous *** is an important public health problem and has a significant impact on patients’quality of life due to chronic pain,inability to work,need for hospitalization and frequent outpatient ***:We investigated the treatment benefits of far-infrared ceramic(cFIR),in a 90-day study of lower limb venous ulcers and looked at ulcer healing scores,quality of life,serum bio-markers of oxidative stress and antioxidant defense ***,setting,participants and interventions:This is a randomized double-blind placebo-controlled study conducted in the Vascular Surgery Service of a hospital located in the northwest region of the State of Rio Grande do Sul,*** included patients with lower limb venous ulcers who were randomized to use either a bioceramics wrap or a placebo wrap for 90 *** outcome measures:The following evaluations were conducted at baseline and after 15,30,60 and90 days:ulcer healing score,quality of life,and serum markers of oxidative stress and antioxidant enzyme ***:Patients(n=24)with lower limb venous ulcers were randomized into two treatment *** decreased the ulcer size on day 30(P=0.042)and 90(P=0.034)and the total ulcer healing scale scores on day 30(P=0.049)and 90(P=0.02)of the treatment,when compared to ***,cFIR improved tissue type(epithelial tissue)on day 60(P=0.022)when compared to baseline ***:cFIR clinically improved ulcer healing in patients with lower limb venous *** registration:RBR-8c7xzn on ReBEC.

关键词： Far-infrared radiation Quality of life Oxidative stress Wound healing Randomized controlled trial Bioceramic wrap

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河南安阳市殷墟小屯西地商代大墓发掘简报

考古 2009年第9期 54-69,I0010-I0012页

作者：岳洪彬岳占伟中国社会科学院考古研究所安阳工作队

2003～2004年,中国社会科学院考古研究所安阳工作队在殷墟小屯西地发掘了一座带两条墓道的大墓M1。墓室为长方形竖穴土坑,随葬品有陶器、铜器、漆器、玉器、石器、骨器、牙器和蚌器等。M1的时代为殷墟第四期偏晚阶段。M1的发掘,为进一... 详细信息

2003～2004年,中国社会科学院考古研究所安阳工作队在殷墟小屯西地发掘了一座带两条墓道的大墓M1。墓室为长方形竖穴土坑,随葬品有陶器、铜器、漆器、玉器、石器、骨器、牙器和蚌器等。M1的时代为殷墟第四期偏晚阶段。M1的发掘,为进一步探讨小屯宫殿宗庙区及其附近区域的布局提供了重要的资料。

关键词：河南安阳殷墟小屯两条墓道大墓殷墟第四期晚段

Rolonged-Release Nitrogen Fertilizers for Reducing Global Environmental Pollution

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Journal of Chemistry and Chemical Engineering 2012年第6期6卷 520-525页

作者： Givi Papava Zaur Lomtatidze Eldar Gugava Marina Gurgemshvli ia Chitirekashvili Ilia Gorozia Zaza Molodinashvili Petre Melikishvili Institute of Physical and Organic Chemistry of Ivane Javakhishvili Tbilisi State University Tbilisi O179 Georgia Agrarian University of Georgia Tbilisi 0179 Georgia Faculty of Natural Science and Healthcare Sokhumi State University Tbilisi 0179 Georgia

Nitrogenous fertilizers of prolonged action were developed on the basis of carbamide （urea）. Technological schemes and parameters are offered to obtain restructured carbamide. Possible versions of degradation of different structure prolonged action fertilizers are considered. It was shown that the most favorable conditions for degradation of polymer molecules are created when molar ratio of the initial carbamide and aldehyde is within 1：1-1.3, correspondingly. At such terms the linear structure molecules with rare cross-links are formed. Such structure is more accessible for penetration of ureasive ferments into polymer molecules.

关键词： Prolonged carbamide aldehyde degradation fertilizer urea restructured pollution.

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由生物过程启发的陶瓷基复合材料制备工艺

国外材料科学与工程 1994年第2期3卷 24-30页

作者： Aksa.,ia 于健

Maintenance of demographic and hematological profiles in a long-lasting dengue fever outbreak: implications for management

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Infectious Diseases of Poverty 2016年第1期5卷 776-786页

作者： Andréia Moreira dos Santos Carmo Rodrigo Buzinaro Suzuki Michele Marcondes Riquena André Eterovic árcia Aparecida Sperança Center for Natural and Human Sciences Universidade Federal do ABCCampus São Bernardo do Campo09606-070 São Bernardo Do CampoSão PauloBrasil Secretaria do Estado da Saúde do Estado de São Paulo Instituto Adolfo LutzCentro de Laboratório Regional VIIISanto André09040-160São PauloBrazil Discipline of Parasitology Marilia Medical SchoolMarilia 17519-030São PauloBrazil Center for Natural and Human Sciences Universidade Federal do ABCCampus Santo AndréSanto André09210-170São PauloBrazil

Background:Dengue fever(DF)outbreaks present regionally specific epidemiological and clinical *** certain medium-sized cities(100000–250000 inhabitants)of São Paulo State,Brazil,and after reaching an incidence of 150 cases/100000 inhabitants(“epidemiological threshold”),clinical diagnosis indicated dengue virus(DENV)*** this period,other seasonally infectious diseases with symptoms and physical signs mimicking DF can simultaneously occur,with the consequential overcrowding of health care facilities as the principal *** of clinical diagnosis of DF with serological tests may help in avoiding faulty diagnosis in patients,who might later undergo dengue hemorrhagic fever(DHF)and the dengue-shock syndrome(DSS).Furthermore,demographic and hematological profiles of patients are useful in detecting specific early characteristics associated to DF,DHF and ***:From March to June,2007,456 patients from Marilia in northwest São Paulo State who had only been diagnosed for DF by clinical criteria,underwent serologic testing for non-structural 1(NS1)DENV *** results were used in comparative analysis according to demographic(gender,age)and hematological(leukocyte and platelet counts,percentage of atypical lymphocytes)*** patterns were evaluated by subdividing data according to time of initial attendance,using recorded variables as predictors of DENV infection in logistic regression models and ROC ***:Serologic DENV detection was positive in 70.6%of the *** leukocyte and platelet counts were the most important factors in predicting DENV infection(respective medians DENV+=3715 cells/ml and DENV-=6760 cells/ml,and DENV+=134896 cells/ml and DENV-=223872 cells/ml).Furthermore,all demographic and hematological profiles presented a conservative temporal pattern throughout this long-lasting ***:As consistency throughout the epidemic facilitated defining the conservation

关键词： Clinical diagnosis Demographic profile Dengue fever Dengue-outbreak pattern Epidemiological threshold Hematological profile

ABX PENTRA 60血液细胞分析仪白细胞五分类结果评价

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实用医技杂志 2003年第10期10卷 1115-1116页

作者：姚彦解放军451医院陕西西安710054

目的:探讨ABX PENTRA 60血液细胞分析仪白细胞五分类的精密度和准确度。方法:对临床248例老年病科疾病患者全血标本进行ABX PENTRA 60血细胞分析仪白细胞五分类及对照目测分类进行相关性分析。结果:中性粒细胞两者相关系数(r)0.96,淋巴... 详细信息

目的:探讨ABX PENTRA 60血液细胞分析仪白细胞五分类的精密度和准确度。方法:对临床248例老年病科疾病患者全血标本进行ABX PENTRA 60血细胞分析仪白细胞五分类及对照目测分类进行相关性分析。结果:中性粒细胞两者相关系数(r)0.96,淋巴细胞为0.96,单核细胞为0.43,嗜酸性粒细胞为0.87,嗜碱性粒细胞为—0.14。结论:除嗜碱性粒细胞外,中性粒细胞、淋巴细胞、单核细胞、嗜酸性粒细胞用仪器分类精密度与准确度相当于目测分类。

关键词： ABX-PENTRA-60型血液细胞分析仪白细胞五分类细胞形态

Evaluation of the Biotechnological Potential of Isolated Bacteria of the Soil in the Degradation of Residues of Skin Swine

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Advances in Microbiology 2014年第9期4卷 493-497页

作者： Andréia Dalla Rosa Nelson G. Golynski Mário L. Teixeira Curso de Medicina Veterinaria Instituto Federal Catarinense—Campus Concordia Concordia Brazil

The degradation of industrial residues is of great importance for the maintenance of the environment. Therefore, the objective of this study is to verify the proteases production for bacteria of the gender isolated Bacillus of soil. The samples of skin residue were collected in industries of the area west of Santa Catarina, using residue of skin rude swine and residue of skin processed swine. The verification of the biotechnological potential consisted of the use of these residues in middle of culture and inoculation of the respective species of bacteria. The results were more expressive in the samples of skin processed swine, where it showed a degradation average around 43.55% (p/p). While, in the samples of residue of skin rude swine, an average of degradation of 20.60% (p/p) happened. In this way, the residue of skin processed swine is more sensitive than the catalytic activity of the bacterial enzymes.

关键词： Bacteria Bacillus Skin Swine Degradation Bioremediation