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Physical and Chemical Characterizations of Rubber Latex Cup Bottom Oil
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作者 Kouassi Konan Edmond Abolle Abollé +3 位作者 Aketchi Tanoé Lucien Konan Affoué Tindo Sylvie Boa David Yao Kouassi Benjamin 《Advances in Bioscience and Biotechnology》 CAS 2024年第9期511-521,共11页
Rubber latex is an important economic resource. However, the residues from its harvesting are thrown away, even though they contain lipids that can be recycled. This recovery of the residues from the bottom of the cup... Rubber latex is an important economic resource. However, the residues from its harvesting are thrown away, even though they contain lipids that can be recycled. This recovery of the residues from the bottom of the cup requires first and foremost their characterization. The aim of this study is therefore to determine the main physical and chemical characteristics of rubber latex cup bottom oil. Oil’s physical parameters determination shows that it has a density of 951 kg∙m−3, a kinematic viscosity of 48.57 cSt and a water content of 0.0845%. Chemical parameters, meanwhile, indicate that this cup bottom residue has a fat content of 95.96%, an acid number of 2.805 mg KOH/g and an iodine number of 92.42 g I2/100g. Therefore, rubber latex cup bottom oil can be used in the formulation of biofuels, biolubricants, paints, varnishes, alkyd resins, polishing oils, soaps, and insecticides. 展开更多
关键词 Rubber latex Cup Bottoms Oil Density Viscosity CHARACTERIZATIONS
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基于LaTeX渲染的微积分在线测试小程序设计与实现
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作者 高文华 李义 《电脑知识与技术》 2024年第26期37-39,共3页
为解决传统微积分在线考试系统中数学公式显示不清、存储空间占用大的问题,文章提出了一种基于LaTeX渲染的微信小程序解决方案。相较于传统的图片存储方式,LaTeX渲染可以显著提高公式显示质量,并减少存储空间。该系统可用于微积分课程... 为解决传统微积分在线考试系统中数学公式显示不清、存储空间占用大的问题,文章提出了一种基于LaTeX渲染的微信小程序解决方案。相较于传统的图片存储方式,LaTeX渲染可以显著提高公式显示质量,并减少存储空间。该系统可用于微积分课程的过程性考核,实现个性化学习跟踪,提高教学效率。 展开更多
关键词 微积分 在线测试 微信小程序 latex渲染 教学改革
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Natural rubber latex as a potential additive for water-based drilling fluids
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作者 Jun Yang Guan-Cheng Jiang +4 位作者 Jing-Tian Yi Yin-Bo He Li-Li Yang Teng-Fei Dong Guo-Shuai Wang 《Petroleum Science》 SCIE EI CAS CSCD 2024年第4期2677-2687,共11页
The environmental hazards and"carbon footprint"of oil and gas drilling can be significantly reduced by replacing traditional petroleum-based chemical additives with natural materials derived from plants and ... The environmental hazards and"carbon footprint"of oil and gas drilling can be significantly reduced by replacing traditional petroleum-based chemical additives with natural materials derived from plants and animals.This paper explored for the first time the interaction mechanism between natural rubber latex(NRL)and bentonite suspensions(BTs)through a series of characterization experiments,as well as the potential applications in water-based drilling fluids(WBDF).The gel viscoelasticity experiments showed that NRL could decrease the consistency coefficient(k)and flow index(n)of BTs,and enhance the shear thinning performance of BTs as pseudo-plastic fluids.In addition,0.5 w/v%NRL not only increased the critical yield stress and strengthened the structural strength between the bentonite particles,but also facilitated the compatibility of pressure loss and flow efficiency.The evaluation of colloidal stability and WBDF performance indicated that NRL particles could promote the hydration and charge stability on the surface of BTs particles,and optimize the particle size distribution and flow resistance of WBDF under the"intercalation-exfoliation-encapsulation"synergistic interaction.Moreover,NRL can improve the rheological properties of WBDF at high temperatures(<150.C),and form a dense blocking layer by bridging and sealing the pores and cracks of the filter cake,which ultimately reduces the permeability of the cake and the filtration loss of WBDF. 展开更多
关键词 Natural materials Water-based drilling fluids Natural rubber latex Bentonite suspensions Filtration loss
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Formulation of Motor Oil from Blends of Rubber Latex Cup Bottom Oil (RLBO) and Used Frying Oil (UFO)
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作者 Konan Edmond Kouassi Abollé Abolle +3 位作者 Dogafolô Soro Tindo Sylvie Konan David Boa Kouassi Benjamin Yao 《Journal of Sustainable Bioenergy Systems》 2024年第3期35-43,共9页
Most motor oils are made from mineral oils derived from petroleum, the reserves of which are limited and exhaustible. The aim of this study is to produce and characterize motor oil formulations based on mixtures of ru... Most motor oils are made from mineral oils derived from petroleum, the reserves of which are limited and exhaustible. The aim of this study is to produce and characterize motor oil formulations based on mixtures of rubber latex cup bottom oil (RLCBO) and used frying oil (UFO). The results show that these formulations have a density between 0.91 and 0.92. These densities evolve linearly with the proportion of cup bottom oil and temperature. Similarly, the kinematic viscosity of the blends follows an exponential relationship with temperature. By plotting the logarithm of these kinematic viscosities against the inverse of the temperature, we were able to determine the activation energy of the various blends and deduce that the formulations behave Newtonian. 展开更多
关键词 FORMULATION Oils Blend Motor Oils latex Bottoms Oil
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Synthesis and Characterization of Fluorine-containing Polyacrylate Emulsion with Core-Shell Structure 被引量:29
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作者 肖新颜 刘健飞 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2008年第4期626-630,共5页
A fluorine-containing polyacrylate copolymer emulsion was synthesized by a seed emulsion polymerization method, in which methyl methacrylate (MMA) and butyl acrylate (BA) were used as main monomers and hexafluorob... A fluorine-containing polyacrylate copolymer emulsion was synthesized by a seed emulsion polymerization method, in which methyl methacrylate (MMA) and butyl acrylate (BA) were used as main monomers and hexafluorobutyl methacrylate (HFMA) as fluorine-containing monomer. The structure and properties were characterized by Fourier transform infrared spectrum (FT-IR), transmission electron microscopy (TEM), particle size analysis, X-ray photoelectron spectroscopy (XPS), contact angle (CA), differential scanning calorimetry (DSC) and thermogravimetry (TG) analysis. The FTIR and TEM results showed that HFMA was effectively involved in the emulsion copolymerization, and the formed emulsion particles had a core-shell structure and a narrow particle size distribution. XPS and CA analysis revealed that a gradient concentration of fluorine existed in the depth profile of fluorine-containing emulsion film which was richer in fluorine and more hydrophobic in one side. DSC and TG analysis also showed that a clear core-shell structure existed in the fluorine-containing emulsion particles, and their film showed higher thermal stability than that of fluorine-free emulsion. 展开更多
关键词 fluorine-containing polyacrylate emulsion core-shell structure seed emulsion polymerization
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Research progress on preparation and purification of fluorine-containing chemicals in lithium-ion batteries 被引量:2
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作者 Xiaobin Liu Zhenguo Gao +2 位作者 Jingcai Cheng Junbo Gong Jingkang Wang 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2022年第1期73-84,共12页
With the development of digital products,electric vehicles and energy storage technology,electronic chemicals play an increasingly prominent role in the field of new energy such as lithium-ion batteries.Electronic che... With the development of digital products,electric vehicles and energy storage technology,electronic chemicals play an increasingly prominent role in the field of new energy such as lithium-ion batteries.Electronic chemicals have attracted extensive attention in various fields.Characteristics of high-end electronic chemicals are high purity and low impurity content,which requires a very strict separation and purification process.At present,crystallization is a key technology for their separation and purification of electronic chemicals.In this work,the representative fluorine-containing compounds in cathode and anode materials,separator and electrolyte of lithium-ion batteries are introduced.The latest technologies for the preparation and purification of four kinds of fluorine-containing battery chemicals by crystallization technology are reviewed.In addition,the research prospects and suggestions are put forward for the separation of fluorine-containing battery chemicals. 展开更多
关键词 Battery chemicals Lithium-ion batteries CRYSTALLIZATION fluorine-containing chemicals
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SYNTHESIS AND CHARACTERIZATION OF A NOVEL FLUORINE-CONTAINING HYDROPHOBICALLY ASSOCIATING POLYMER 被引量:3
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作者 Jin Yang Wei-yuan Huang Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China 《Chinese Journal of Polymer Science》 SCIE CAS CSCD 1999年第3期281-288,共8页
In this article, the synthesis and characterization of a novel fluoromonomer and its copolymer with acrylamide is reported. 2-perfluoroamyl-4-hydroxylquinoline 2 was synthesized from ethyl 2, 2-dihydroperfluoroheptano... In this article, the synthesis and characterization of a novel fluoromonomer and its copolymer with acrylamide is reported. 2-perfluoroamyl-4-hydroxylquinoline 2 was synthesized from ethyl 2, 2-dihydroperfluoroheptanoate in high yields. The monomer 4 was then synthesized from 2 in two steps readily in high yields. Synthesis and characterization of copolymers of acrylamide (AM) and the fluoromonomer were investigated. The composition and intrinsic viscosity of these copolymers were studied. It was found that the rheological properties of aqueous solutions of polyacrylamide were modified significantly when a small proportion of the fluoromonomer 4 was incorporated on investigating the viscosity-concentration profiles, pseudoplasticity of these solutions and the effect of the presence of surfactant. These results could be explained by the hydrophobic association of the fluorocarbon segments in the aqueous solutions of these copolymers. 展开更多
关键词 hydrophobically associating polymer fluorine-containing acrylate perfluoroalkylation with RFI/Na2S2O4
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Design and Synthesis of Novel Fluorine-containing Acrylates 被引量:1
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作者 Yan Chao WU Chao WU Xiao Mao ZOU Fang Zhong HU Hua Zheng YANG 《Chinese Chemical Letters》 SCIE CAS CSCD 2005年第10期1293-1296,共4页
A series of novel fluorine-containing acrylates 6a-6g were synthesized via the condensation of ethyl cyanoacetate and trifluoroacetic anhydride, followed by chloridization and the coupling reaction with amines. These ... A series of novel fluorine-containing acrylates 6a-6g were synthesized via the condensation of ethyl cyanoacetate and trifluoroacetic anhydride, followed by chloridization and the coupling reaction with amines. These new compounds exhibited some biological activity as preliminary bioassay indicated. A plausible reaction mechanism was outlined and discussed. 展开更多
关键词 fluorine-containing compound ACRYLATES synthesis.
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Michael Addition of Nitroalkanes to CF_3CCl_2COCH=CHPh: A Facile Route to Fluorine-containing γ-Nitro Ketones 被引量:1
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作者 Qiao Sheng HU and Chang Ming HU(Laboratory of Organofluorine Chemistry Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 354 Fengling Lu, Shanghai, 200032) 《Chinese Chemical Letters》 SCIE CAS CSCD 1997年第8期665-668,共4页
Nitroalkanes react smoothly with CF_3CCl_2COCH=CHPh via Michael addition in the presence of inorganic bases such as KF/Al2O3 or K2CO3, giving fluorinecontaining γ-nitro ketones in good yields.
关键词 CF CO Michael Addition of Nitroalkanes to CF3CCl2COCH=CHPh ppm Nitro Ketones Michael Addition of Nitroalkanes to CF3CCl2COCH A Facile Route to fluorine-containing
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Synthesis and Characterization of Fluorine-containing Poly(ether ether ketone)s
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作者 ZHANG Pei ZHAO Yun TANG Xin-liang ZHOU Ming-ji JIAO Qing-ze 《Chemical Research in Chinese Universities》 SCIE CAS CSCD 2010年第4期672-674,共3页
Poly(ether ether ketone)s(PEEK) are a class of high performance engineering thermoplastics known for their excellent thermal, mechanical, and electrical properties. This class of advanced materials has currently r... Poly(ether ether ketone)s(PEEK) are a class of high performance engineering thermoplastics known for their excellent thermal, mechanical, and electrical properties. This class of advanced materials has currently received considerable attention for potential application in aerospace, electronics, automobile and other high technology fields. However, it is difficult for PEEK to be processed because of their high melting temperature and poor solubility. 展开更多
关键词 fluorine-containing polymer SOLUBILITY Dielectric constant
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Ethyl 2-diazo-3-oxo-perfluorocarboxylates as a Potentially Fluorine-containing Building Block:[Rh(OAc)_2]_2-Catalyzed Reaction with Nitriles
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《厦门大学学报(自然科学版)》 CAS CSCD 北大核心 1999年第S1期241-241,共1页
关键词 Rh OAC Ethyl 2-diazo-3-oxo-perfluorocarboxylates as a Potentially fluorine-containing Building Block Catalyzed Reaction with Nitriles
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A CONVENIENT SYNTHESIS OF FLUORINE-CONTAINING QUINOLINES
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作者 Wei Yuan HUANG Yan Song LIU Long Lü,Shanghai Institute of Organic Chemistry,The Chinese Academy of Sciences,345 Lingling Lu,Shanghai,200032 《Chinese Chemical Letters》 SCIE CAS CSCD 1992年第8期583-584,共2页
2-Fluoroalkyl-4-hydroxy-quinolines were easily obtained from the reactions of 2-(F-alkyl)acetates with aromatic amines in the presence of Et_3N,followed by cyclization of the intermediates with PPA.
关键词 A CONVENIENT SYNTHESIS OF fluorine-containing QUINOLINES
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Toxic Effects of Ficus benghalensis Latex Based Combinatorial Formulations on Various Enzymatic Parameters in Indian White Termite Odontotermes obesus
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作者 Abhishek Kumar Tripathi Ravi Kant Upadhyay 《Advances in Enzyme Research》 2023年第2期34-57,共24页
In the present investigation, various bioassays were conducted to evaluate the alteration in levels of various enzymes i.e. alkaline phosphatase, acid phosphatase, glutamate oxaloacetate transaminase, glutamate pyruva... In the present investigation, various bioassays were conducted to evaluate the alteration in levels of various enzymes i.e. alkaline phosphatase, acid phosphatase, glutamate oxaloacetate transaminase, glutamate pyruvate transaminase and acetylcholinesterase. For this purpose worker termites were treated with sub-lethal doses of 40% and 80% of 24 hrs LD<sub>50</sub> of latex-based combinatorial formulations and observations were taken at 4 hours intervals up to 24 hours. Ficus benghalensis crude latex and its combinatorial mixtures, like C-MLT-A, CU-MLT-A, AQ-MLT, P-MLT and EA-MLT significantly altered the level of enzymes in Odontotermes obesus and this effect found time and dose-dependent. Reduction or increase in enzymes was calculated by using the corresponding control. The maximum decrease in acid phosphatase level was observed at 16 h when termites were treated with 80% of LD<sub>50</sub> of B-MLT-B and P-MLT i.e. 82.84% at 16 h of treatment. A similar dose caused a very slight decrease in glutamate pyruvate transaminase at 4 h of treatment but with the increase in time. Further decrease was noted in other successive treatments that were significant at p > 0.05. Similarly, 40% and 80% of LD<sub>50</sub> of the C-MLT-B mixture caused significant (p > 0.05) decrease in alkaline phosphatase and acid phosphatase level at 16 h treatment i.e. 93.42%, 89.46% and 95.89%, 88.17% respectively. The level of acetylcholinesterase was also found to be decreased when termites were treated with 40% and 80% of LD<sub>50</sub> of C-MLT-B mixture i.e. 92.72% and 97.27% respectively. All the above alterations noted in levels of various enzymes confirm the action of latex ingredients on worker termites that were anti-feedant or deterrent types. These ingredients can be used to control not only termites but also other phytophagous insects. 展开更多
关键词 Ficus benghalensis Enzymes ALTERATION Odontotermes obesus latexES Anti-Feedant Termiticides
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基于LaTeX的高等数学题库建设与试卷生成
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作者 谭学忠 《韶关学院学报》 2023年第12期36-40,共5页
题库管理与出试卷是高校老师工作中的重要组成部分.传统的管理与操作方法费时费力,同时在试题重复率、格式化与标准化等方面相对难以控制.针对中文理工科组卷,利用Te X系统实现题库管理与组卷,能大大减轻老师工作量.在分析高校题库与试... 题库管理与出试卷是高校老师工作中的重要组成部分.传统的管理与操作方法费时费力,同时在试题重复率、格式化与标准化等方面相对难以控制.针对中文理工科组卷,利用Te X系统实现题库管理与组卷,能大大减轻老师工作量.在分析高校题库与试卷管理现状及高校理工科试卷特点等基础上,利用LaTeX排版系统和Exam文档类制作与生成题库,利用LaTeX实现自动编号、一键生成试卷和参考答案,以及数学公式、图表等格式化处理,从而形成一整套题库管理与出卷系统. 展开更多
关键词 latex Exam文档类 试题库
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Defensive Role of Plant Latex on Insect Pests’ Suppression: A Critical Review
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作者 Kriti Singh Tamoghno Majumder +8 位作者 Aivi Mallick Abhismita Samajder Moumita Modak Maimon Soniya Devi Amitava Banerjee Anirban Sarkar Lakshman Chandra Patel Shanowly Mondal Ghosh Kusal Roy 《American Journal of Plant Sciences》 2023年第11期1375-1398,共24页
Over 350 million years have passed since the documentation of the first interaction between plants and insects. Numerous plant defense qualities and associated counter-adaptive features have developed as a result of t... Over 350 million years have passed since the documentation of the first interaction between plants and insects. Numerous plant defense qualities and associated counter-adaptive features have developed as a result of these interactions between insects and plants. These characteristics might be either morphological or biological in nature. One of the most significant and useful biochemical characteristics in plants is latex. Latex has a sticky property due to presence of secondary metabolites in it, which aids in entangling or sealing the mouthparts of small insects. These metabolites also chemically interact with the insects interfering with crucial bodily processes. Plant latex has amazing properties that help protect plants from insects and inhibit them in general. It may be possible to control insect pests in a natural, secure, and long-lasting manner by correctly identifying plant latex with strong insecticidal properties and developing formulations of plant latex. 展开更多
关键词 Plant latex Insect Herbivory Plant Defence Insect-Plant Interactions
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Effect of Ficus benghalensis Latex Based Combinatorial Formulations on Various Bio-Molecules in Indian White Termite Odontotermes obesus
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作者 Abhishek Kumar Tripathi Ravi Kant Upadhyay 《Journal of Biosciences and Medicines》 2023年第4期82-102,共21页
In present investigation, various bioassays were conducted to evaluate the alteration in levels of certain biomolecules, such as glycogen, protein, amino acid, DNA, RNA and lipids. For this purpose, worker termites we... In present investigation, various bioassays were conducted to evaluate the alteration in levels of certain biomolecules, such as glycogen, protein, amino acid, DNA, RNA and lipids. For this purpose, worker termites were treated with sub-lethal dose 40% and 80% of 24 hrs LD<sub>50</sub> values and observations were taken at 4 hrs interval up to 24 hrs. Crude latex and its combinatorial mixtures, like S-MLT-A, B-MLT-A, C-MLT-A, CU-MLT-A, AQ-MLT significantly altered level of bio-molecules in Odontotermes obesus. This effect was found time and dose dependent. Reduction or increase in biomolecules was calculated by using corresponding control. Maximum decrease in glycogen level was observed at 16 h when termites were treated with 80% of LD<sub>50</sub> of Ficus benghalensis aqueous extract i.e. 56.88% at 16 h of treatment. A similar dose caused very slight decrease in lipid contents at 4 h of treatment but it was found further significantly (p > 0.05) decreased in other successive treatments. 40% and 80% of LD<sub>50</sub> of C-MLT-B mixture caused significant (p > 0.05) decrease in DNA and RNA level at 16 h treatment. The level of DNA and RNA level was recorded 83.90%, 90.18% and 85.42% and 74.05% respectively. Similarly, total proteins were also found to be decreased with 40% and 80% of LD<sub>50</sub> of C-MLT-B mixture i.e. 71.47% and 66.45% respectively. All these alterations found in levels of various bio-molecules confirm the action of latex ingredients on worker termites that was antifeedant or deterrent types. These ingredients can be used to control not only termites but also other phytophagous insects in a sustainable and eco-friendly way. 展开更多
关键词 Ficus benghalensis Odontotermes obesus latexES Antifeedant or Deterrent Termiticides
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Comprehensive treatment of latex wastewater and resource utilization of concentrated liquid
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作者 Shichao Tian Yuming Tu +4 位作者 Rujie Li Yufan Du Zhiyong Zhou Fan Zhang Zhongqi Ren 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2023年第5期183-192,共10页
Latex wastewater is a kind of refractory organic wastewater containing high concentrations of organics and ammonia nitrogen.In this work,the combined process of forward osmosis(FO)and reverse osmosis(RO)was designed t... Latex wastewater is a kind of refractory organic wastewater containing high concentrations of organics and ammonia nitrogen.In this work,the combined process of forward osmosis(FO)and reverse osmosis(RO)was designed to treat the latex wastewater in the whole process,achieving the water recovery rate of 99%and basically no waste discharge after the catalytic oxidation process.The turbidity of the latex wastewater was decreased to below 1 NTU by microfiltration pretreatment,and then using MgCl_2 worked as the draw solution for FO process to treat the latex wastewater.Different operation conditions including adding acid or scale inhibitor as the pretreatment methods were conducted to improve the treatment performance of the combined process.After the treatment of the whole process,the concentration of COD was less than 20 mg·L^(-1),the concentration of NH_3-N was less than 10 mg·L^(-1),and the concentration of TP was less than 0.5 mg·L^(-1)for the treated latex wastewater.The water quality met standards of industrial water reuse after the complete analysis of the treated latex wastewater,meanwhile,useful substances of L-Quebrachitol(L-Q)were successfully extracted from the concentrated solution.Therefore,the combined process of FO and RO could realize the efficient treatment and reuse of latex wastewater,which provided with some important guidance on the industrial application. 展开更多
关键词 latex wastewater Resource utilization Forward osmosis Reverse osmosis Concentrated liquid
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Mechanical Characterization of Rubber Latex-Based Carpets (Hevea bresiliensis): Influence of Rubber Latex Content and Fiber Fabrics (Cotton and Mosquito Nets) on Wear Resistance of Rubber Latex-Based Carpets
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作者 Assoumou Joseph Yomanfo Obre Sery Paul Jolissaint +1 位作者 Edjikémé Emeruwa Maméry Adama Serifou 《Open Journal of Composite Materials》 2023年第3期47-55,共9页
This work focuses on the development of carpets from sand, fabrics of cotton fiber and mosquito nets and rubber latex. Following a study on the choice of the best formulations, the quantity of rubber latex used for sh... This work focuses on the development of carpets from sand, fabrics of cotton fiber and mosquito nets and rubber latex. Following a study on the choice of the best formulations, the quantity of rubber latex used for shaping varies between 14% and 18% (latex/sand + latex ratio) for the carpet with the fabric of mosquito nets and between 16% and 18% for the one made with the fabric of cotton fiber. Thus, with a mixture of sand, fiber fabrics (cotton and mosquito nets) and rubber latex, carpets were developed. In addition, the wear test carried out on these samples indicates that it is possible to produce carpets with the new material made of rubber sand and latex: SABLATEX At room temperature. Following the characterization test, it resorts to only 16% latex with cotton fiber fabric, allowing to have carpets with good mechanical characteristics. 展开更多
关键词 Carpet Rubber latex Wear Test latex Content Fiber Fabrics
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胶乳增强免疫比浊法NSE诊断试剂盒性能验证及临床应用
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作者 白晶 刘瑜 +1 位作者 蒲云罡 刘向祎 《标记免疫分析与临床》 CAS 2024年第7期1315-1320,共6页
目的对胶乳增强免疫比浊神经元特异性烯醇化酶(neuron-specific enolase,NSE)试剂盒进行性能验证。方法按照CNAS-GL037:2019《临床化学定量检验程序性能验证指南》、WS/T492-2016《临床检测定量测定项目精密度与正确度性能验证》并结合... 目的对胶乳增强免疫比浊神经元特异性烯醇化酶(neuron-specific enolase,NSE)试剂盒进行性能验证。方法按照CNAS-GL037:2019《临床化学定量检验程序性能验证指南》、WS/T492-2016《临床检测定量测定项目精密度与正确度性能验证》并结合试验工作,重新设计了检验方法,在贝克曼库尔特AU5800全自动生化分析对北京九强金斯尔NSE胶乳增强免疫比浊法试剂盒的正确度、精密度、线性范围、可报告范围和生物参考区间等性能进行验证和评估,并与对应罗氏电化学发光法试剂盒进行方法学比对。测试结果与厂家所给出的产品分析性能以及美国国家卫生委员会临床检测中心(National Center for Clinical Laboratories,NCCL)的相关指标进行了对比。结果5个水平的正确度偏倚分别为1.74%、-1.42%、-0.88%、-3.09%和-0.90%;2个水平的批内及批间精密度的变异系数(coefficient of variation,CV)分别为1.85%和0.88%(判断标准CV<7.5%),4.99%和3.34%(判断标准CV<10%);线性范围(3.5~148.1ng/mL)验证回归系数a值为0.9894,R2=0.9978;最大稀释倍数为8倍,临床可报告上限为1165.2ng/mL;厂家提供的生物参考区间为0~16.3ng/L,符合率R为100%,各性能均通过验证。此外,与罗氏电化学发光试剂盒进行方法学比对,其相关性分析结果为:两种方法的相关性(R2=0.989)、一致性(CCC=0.984)均较好,在临床判定效果上同Roche的电化学发光试剂盒相比,免疫增强比浊方法阳性符合率为95.74%,阴性符合率为96.23%,两者测定值接近,相关系数达0.9894。结论基于全自动生化分析平台测定的NSE胶乳增强免疫比浊试剂盒,各性能均可以较好地满足临床使用要求,且与电化学发光法检测结果一致性较好,有望进一步推进NSE国产体外诊断试剂盒的临床应用。 展开更多
关键词 NSE 胶乳免疫比浊法 生化分析仪 性能验证 方法学比对
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改性干粉型聚合物水泥砂浆试验研究 被引量:1
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作者 盖广清 王海建 《吉林建筑大学学报》 CAS 2024年第2期21-25,共5页
本文研究两种不同的可再分散乳胶粉(醋酸乙烯-乙烯共聚物和醋酸乙烯/叔碳酸乙烯酯共聚物)对干粉型聚合物水泥砂浆力学性能、粘结强度、吸水率、干燥收缩的性能影响。结果表明,可再分散乳胶粉的掺量、类型对聚合物水泥砂浆的性能影响较大... 本文研究两种不同的可再分散乳胶粉(醋酸乙烯-乙烯共聚物和醋酸乙烯/叔碳酸乙烯酯共聚物)对干粉型聚合物水泥砂浆力学性能、粘结强度、吸水率、干燥收缩的性能影响。结果表明,可再分散乳胶粉的掺量、类型对聚合物水泥砂浆的性能影响较大,力学性能较普通水泥砂浆有明显的提升和改善。可再分散乳胶粉的加入虽然降低了砂浆的抗压强度,但显著提高了抗折强度和折压比,改善了砂浆的柔韧性和抗裂能力;砂浆的干燥收缩、粘结强度和吸水率等性能均有较为明显的改善。 展开更多
关键词 可再分散乳胶粉 干粉型聚合物水泥砂浆 力学性能 折压比 干燥收缩
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