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Synthesis of water-soluble acryl terpolymers and their anticorrosion properties on mild steel in 1 mol·L^(-1) HCl

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中国化学工程学报：英文版 2016年第4期24卷 543-552页

作者： R.Geethanjali S.Subhashini Department of Chemistry Avinashilingam Institute for Home Science and Higher Education for Women

Two water soluble acryl terpolymers containing polyvinyl alcohol, acrylamide/acrylic acid and vinyl sulphonic acid(VSA) were synthesized by free radical polymerization in aqueous medium. The morphological structure of the polymers were analysed using FTIR and1 H NMR, while the thermal properties were analysed by TGA and DSC. The inhibitive action of the terpolymers on corrosion of mid-steel in 1 mol·L-1HCl was studied using gravimetric, potentiodynamic polarisation and electrochemical impedance spectroscopy(EIS) at 303 K.Both the polymers provided inhibition efficiency around 90% which clearly demonstrate that the grafted polymers have effective corrosion inhibiting ability on MS corrosion.

关键词：丙烯酸共聚物聚合合成水溶性 mol 防腐性能 HCl 碳钢电化学阻抗谱

生态友好型缓蚀剂荠菜提取液在1mol·L^(-1)盐酸介质中对Q235碳钢的缓蚀行为研究（英文）

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Chinese Journal of Chemical Engineering 2015年第8期23卷 1408-1415页

作者：胡琴邱于兵张国安郭兴蓬 School of Chemistry and Chemical Engineering Huazhong University of Science and Technology Hubei Key Laboratory of Materials Chemistry and Service Failure

The corrosion inhibition effect of Capsella bursa-pastoris extracts(CBE) for Q235 carbon steels in 1 mol·L-1hydrochloric acid solution was studied using electrochemical methods, environmental scanning electron microscopy(SEM) and Raman microscopy analysis. The polarization plots indicate that CBE serves as an effective, mixedtype inhibitor. Linear polarization resistance shows that increasing CBE concentration and temperature results in increased inhibition ef ficiency. The highest inhibition ef ficiency can reach 97% when adding 60 mg·L-1CBE,which is better than some reported plant extracts under the similar environment. The adsorption of CBE molecules is found to obey the Langmuir adsorption isotherm. Some thermodynamic and kinetic parameters for the adsorption process, such as the adsorption equilibrium constant(K), free energy of adsorption(ΔG ads), activation energy of corrosion reaction(E a) and the heat of adsorption(Q ads), are calculated and discussed. SEM and Raman microscopy analysis also demonstrate the formation of a CBE inhibition film on the metal surface.

关键词：植物提取物环境友好型腐蚀反应 Q235碳钢 mol 抑制剂环境扫描电子显微镜荠菜

Enterocyte dendritic cell-specific intercellular adhesion molecule-3-grabbing non-integrin expression in inflammatory bowel disease

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World Journal of Gastroenterology 2015年第1期21卷 187-195页

作者： Jing-Qing Zeng Chun-Di Xu Tong Zhou Jing Wu Kai Lin Wei Liu Xin-Qiong Wang Department of Pediatrics Ruijin HospitalShanghai Jiao Tong University School of Medicine Department of Pediatrics Shanghai Children’s Medical CenterShanghai Jiao Tong University School of Medicine

AIM: To investigate dendritic cell-specific intercellular adhesion molecule-3-grabbing non-integrin(DC-SIGN) expression in intestinal epithelial cells(IECs) in inflammatory bowel disease(IBD).METHODS: The expression of DC-SIGN in IECs was examined by immunohistochemistry of intestinal mucosal biopsies from 32 patients with IBD and 10 controls.Disease activity indices and histopathology scores were used to assess the tissue lesions and pathologic damage.Animal studies utilized BALB/c mice with dextran sodium sulfate(DSS)-induced colitis treated with anti-P-selectin lectin-EGF domain monoclonal antibody(PsL-EGFmA b).Controls,untreated and treated mice were sacrificed after 7 d,followed by isolation of colon tissue and IECs.Colonic expression of DC-SIGN,CD80,CD86 and MHC Ⅱ was examined by immunohistochemistry or flow cytometry.The capacity of mouse enterocytes or dendritic cells to activate T cells was determined by coculture with naive CD4+ T cells.Culture supernatant and intracellular levels of interleukin(IL)-4 and interferon(IFN)-γ were measured by enzyme-linked immunosorbent assay and flow cytometry,respectively.The ability of IECs to promote T cell proliferation was detected by flow cytometry staining with carboxyfluorescein diacetate succinimidyl ester.RESULTS: Compared with controls,DC-SIGN expression was significantly increased in IECs from patients with Crohn's disease(P < 0.01) or ulcerative colitis(P < 0.05).DC-SIGN expression was strongly correlated with disease severity in IBD(r = 0.48; P < 0.05).Similarly,in the DSS-induced colitis mouse model,IECs showed upregulated expression of DC-SIGN,CD80,CD86 and MHC,and DC-SIGN expression was positively correlated with disease activity(r = 0.62: P < 0.01).IECs from mouse colitis stimulated naive T cells to generate IL-4(P < 0.05).Otherwise,dendritic cells promoted a T-helper-1-skewing phenotype by stimulating IFN-γ secretion.However,DC-SIGN expression and T cell differentiation were suppressed following treatment of mice with DSS-induced colitis with Ps L-EGFm

关键词： Dendritic cell-specific intercellular adhesion mol

N-甲基-2-(2-硝基苯亚甲基)肼硫代酰胺——一种在1mol·L^(-1)盐酸中对低碳钢的新型缓蚀剂（英文）

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Chinese Journal of Chemical Engineering 2015年第11期23卷 1916-1922页

作者： K.Krishnaveni K.Sampath J.Ravichandran C.Jayabalakrishnan Research Department of Chemistry Sri Ramakrishna Mission Vidyalaya College of Arts and Science Department of Chemistry Kumaraguru College of Technology

The corrosion inhibition of mild steel in 1 mol·L^(-1) hydrochloric acid by N-methyl-2-(2-nitrobenzylidene)hydrazine carbothioamide(MNBHC) was studied using weight loss and electrochemical studies.Results obtained indicate that the inhibitor is effective in hydrochloric acid medium and the efficiency decreases with increase in temperature.Added halide additives improve the efficiency of the inhibitor.The AC impedance studies reveal that the process of inhibition is through charge transfer.Polarization studies indicate the mixed nature of the inhibitor.From the thermodynamic,spectral and surface analyses the nature of adsorption has been found out.The adsorption of the inhibitor on mild steel follows the Langmuir isotherm.

关键词：盐酸介质硫代酰胺 mol 缓蚀剂 N-甲基碳钢肼混合性质

Responses of Carbonic Anhydrase to Cadmium in the Zinc/Cadmium Hyperaccumulator Picris divaricata Vant.

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Pedosphere 2016年第5期26卷 709-716页

作者： LIU Saihua TANG Yetao QIU Rongliang YING Rongrong GE Ruiguang JI Xionghui School of Environmental Science and Engineering Sun Yat-sen UniversityGuangzhou 510275(China) Hunan Soil and Fertilizer Institute Changsha 310125(China) Guangdong Provincial Key Lab of Environmental Pollution Control and Remediation Technology Guangzhou 510275(China) Nanjing Institute of Environmental Sciences Ministry of Environmental ProtectionNanjing 210042(China) Key Laboratory of Gene Engineering of the Ministry of Education and State Key Laboratory of Biocontrol College of Life ScienceSun Yat-sen UniversityGuangzhou 510275(China)

A number of higher plants are able to hyperaccumulate cadmium(Cd). However, it is unknown whether cadmium(Cd) plays a biological functional role in the carbonic anhydrase(CA) of hyperaccumulators. A hydroponic experiment was conducted to explore the potentially physiological function of Cd in CA and the accumulation and tolerance of Cd in the Zn/Cd hyperaccumulator Picris divaricata Vant. P. divaricata was exposed to nutrient solutions with six Cd concentrations(0, 5, 10, 25, 50 and 75 μmol L^(-1)). After 12 d, plants were harvested for the analysis of plant biomass, Cd concentration and CA activity. The Cd concentrations in plant increased with the increasing Cd in nutrient solution, reaching 640 and 3 100 mg kg^(-1) in shoot and root, respectively, at the 75 μmol L^(-1) Cd treatment. Meanwhile, plant growth was enhanced by the Cd treatments at 5–25 μmol L^(-1), but it was significantly inhibited when the plants were exposed to solutions with higher Cd concerntrations(50 and 75 μmol L^(-1)). Exposure to Cd significantly increased the CA activity in P. divaricata, which reached a maximum value of 21.27 U mg^(-1) proteins at the 25 μmol L^(-1)Cd treatment, and the CA activity and shoot Cd concentration were positively correlated at solutions Cd of ≤ 25 μmol L^(-1). Moreover, two protein bands appeared on the denatured gel electrophoresis of purified CA, indicating that P. divaricata may have CA isomers with their respective molecular weights at around 60 and 55 k Da, at least one of which is Cd-bound. In addition, trace amounts of Cd in purified CA significantly increased with the supplied Cd concentration in nutrient solution(5–25 μmol L^(-1)). The results suggested that Cd may play a biological role by enhancing the activities and forming the active Cd-specific CA in the hyperaccumulator P. divaricata.

关键词：镉(Cd) 超积累防风超富集植物反应锌 mol 生物学功能

A novel simple bifunctional catalyst for the direct aldol reaction

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Chinese Chemical Letters 2011年第6期22卷 651-654页

作者： Chang Lu Liu Hao Zhang Ning Wang ab School of Chemistry and Chemical Engineering Southwest UniversityChongqing 400715China Department of Chemistry Sichuan University of Arts and SciencesDazhou 635000China

醛和酉同类的直接丁间醇醛反应能面对萘粉 / 钠 naphtholate (5 mol%) 的催化数量顺利继续与收益负担得起相应产品直到 98% 。如此的 bifunctional 催化剂比在直接丁间醇醛反应采用的强壮的酸或底更中等。

关键词： Aldol反应双功能催化剂 mol 收益率强酸钠酮醛

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当品牌遇见潮流文化

科技创新与品牌 2022年第5期 37-41页

作者：段永利不详

2021年12月22日,“纳为天书——韩美林天书艺术故宫展”在故宫博物院揭幕。当天,众多重量级嘉宾和文艺爱好者在故宫偶遇了泡泡玛特SPACEmolLY,不经意间,中国艺术大师+泡泡玛特MEGA珍藏系列SPACEmolLY+故宫这套组合,成了潮玩爱好者的天... 详细信息

2021年12月22日,“纳为天书——韩美林天书艺术故宫展”在故宫博物院揭幕。当天,众多重量级嘉宾和文艺爱好者在故宫偶遇了泡泡玛特SPACEmolLY,不经意间,中国艺术大师+泡泡玛特MEGA珍藏系列SPACEmolLY+故宫这套组合,成了潮玩爱好者的天花板。这几个看似完全不搭界的概念,是如何绑定在一起,而且毫无违和感?

关键词：故宫博物院韩美林玛特潮流文化天花板 mol 泡泡重量级

Application of 2,2'-dithiobis(4-methylthiazole) as sensing material for construction of Lu^(3+) PVC-membrane sensor

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Chinese Chemical Letters 2011年第8期22卷 977-980页

作者： Mohammad Reza Abedi Hassan Ali Zamani Department of Applied Chemistry Quchan BranchIslamic Azad UniversityQnchanIran

在这个工作，一个新 Lu3+PVC 膜传感器基于 2,2-dithiobis (4-methylthiazole )(TMT ) 被制作了。传感器展出 19.6 潮慰瑲捩敬 ?  ? 的一个 Nernstian 斜坡 ??? 柳言吗？？

关键词：离子传感器传感材料 PVC膜应用浓度范围 TMT 检测限 mol

同步扫描荧光光谱法同时测定阿司匹林和水杨酸

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光谱学与光谱分析 2005年第4期25卷 588-590页

作者：魏永锋李小花马冬梅西北大学化学系陕西西安710069

建立了同步扫描荧光光谱法单次扫描同时测定阿司匹林和水杨酸双组分的方法。荧光光度计同步扫描时,得到两组分互不干扰的荧光峰,借此分别测定两组分的含量。阿司匹林和水杨酸浓度分别在4 . 0×10 -6～1. 0×10 -4mol·L-1,8 0×10 -7～1... 详细信息

建立了同步扫描荧光光谱法单次扫描同时测定阿司匹林和水杨酸双组分的方法。荧光光度计同步扫描时,得到两组分互不干扰的荧光峰,借此分别测定两组分的含量。阿司匹林和水杨酸浓度分别在4 . 0×10 -6～1. 0×10 -4mol·L-1,8 0×10 -7～1 .0×10 -4mol·L-1范围内与荧光强度呈线性关系,相关系数分别为0 .994 9和0. 9975 ,水杨酸的检测限为4 . 0×10 -7mol·L-1。该法简单、快速准确、易操作,可用于药物制剂中阿司匹林和水杨酸的同时测定。

关键词：荧光光谱法阿司匹林同时测定同步扫描水杨酸荧光光度计单次扫描线性关系荧光强度相关系数药物制剂双组分酸浓度 mol 检测限