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聚丙烯酰胺凝胶上SDH的活染
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作者 夏玉凤 王友爱 《河北师范大学学报(自然科学版)》 CAS 1999年第4期546-548,共3页
精心选择了电泳系统及活染条件,得到较清晰的活染结果.从活染胶板上发现玉米叶SDH 存在两种形式,而根部只有一种形式.可能在叶及根部都存在的那种SDH
关键词 天然电泳 活染 聚丙烯酰胺 膜结合酶 凝胶 SDH
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局部皮肤放射性活染和处理方法
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作者 问清华 李景秋 《中华放射医学与防护杂志》 CAS CSCD 北大核心 1989年第2期124-125,共2页
关键词 皮肤 放射活染 处理
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睾酮在体外对脾淋巴细胞增殖反应和分泌IgG的影响 被引量:5
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作者 姚根宏 侯亚义 +2 位作者 沈苏南 王勇 许欢 《卫生研究》 CAS CSCD 北大核心 2002年第5期333-335,共3页
为探讨雄激素对大鼠脾淋巴细胞产生免疫球蛋白和增殖反应的影响 ,用不同浓度睾酮作用于脾淋巴细胞 ,用中性红活染比色法和四甲基偶氮唑兰法 (MTT)分别观察睾酮对培养的大鼠脾淋巴细胞增殖的影响 ;用酶联免疫法 (ELISA)检测不同浓度睾酮... 为探讨雄激素对大鼠脾淋巴细胞产生免疫球蛋白和增殖反应的影响 ,用不同浓度睾酮作用于脾淋巴细胞 ,用中性红活染比色法和四甲基偶氮唑兰法 (MTT)分别观察睾酮对培养的大鼠脾淋巴细胞增殖的影响 ;用酶联免疫法 (ELISA)检测不同浓度睾酮处理的脾淋巴细胞由刀豆素A(ConA)刺激产生白细胞介素 6(IL- 6)和免疫球蛋白 (IgG)的影响。结果发现在睾酮作用下 ,细胞增殖反应下降 ;睾酮可下调脾淋巴细胞产生的IgG。 展开更多
关键词 睾酮 雄激素 脾淋巴细胞 细胞增殖 免疫球蛋白 中性红活染比色法 四甲基偶氮唑兰法 免疫调节
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一种制备培养细胞整装内质网共聚焦激光扫描显微镜标本的新方法
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作者 黄集前 李家滨 +1 位作者 苏若萍 宋今丹 《解剖科学进展》 CAS 1995年第4期368-368,共1页
一种制备培养细胞整装内质网共聚焦激光扫描显微镜标本的新方法黄集前,李家滨,苏若萍,宋今丹(中国医科大学卫部细胞生物学重点实验室沈阳l10001)喹啉蓝活染细胞内质网时,荧光的快速粹灭是影响共聚焦激光扫描显微镜(Con... 一种制备培养细胞整装内质网共聚焦激光扫描显微镜标本的新方法黄集前,李家滨,苏若萍,宋今丹(中国医科大学卫部细胞生物学重点实验室沈阳l10001)喹啉蓝活染细胞内质网时,荧光的快速粹灭是影响共聚焦激光扫描显微镜(ConfOcallaserscannin... 展开更多
关键词 喹啉蓝活染 细胞内质网 共聚焦激光扫描显微镜 标本制作 CLSM 三维结构
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Soil vanadium pollution and microbial response characteristics from stone coal smelting district 被引量:8
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作者 肖细元 杨淼 +3 位作者 郭朝晖 姜智超 刘亚男 曹霞 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2015年第4期1271-1278,共8页
A field investigation was performed to study the content, speciation and mobility of vanadium, as well as microbial response in soil from a stone coal smelting district in Hunan province of China. The results showed t... A field investigation was performed to study the content, speciation and mobility of vanadium, as well as microbial response in soil from a stone coal smelting district in Hunan province of China. The results showed that the contents of soil V ranged from 168 to 1538 mg/kg, which exceeded the maximum permissible value of Canadian soil quality for V. The mean soil V content from wasteland area reached 1421 mg/kg, and those from the areas related with slag heap, ore pile and smelting center were 380, 260 and 225 mg/kg, respectively. Based on the results of the modified BCR sequential extraction procedure, V contents in the mobile fractions varied from 19.2 to 637 mg/kg accounting for 7.4%-42.3% of total V, and those of V(+5) species were between 21.9 and 534.0 mg/kg. Soil enzyme activity and microbial basal respiration were adversely affected by high level of soil V. More attention should be paid to soil V pollution and potential hazardous surrounding the stone coal smelting district. 展开更多
关键词 VANADIUM soil pollution MOBILITY microbial response stone coal smelting district
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Analysis on Selection of Domestic Sewage Treatment Method in Rural Area 被引量:14
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作者 万玉山 张平 +1 位作者 李定龙 马建锋 《Agricultural Science & Technology》 CAS 2011年第4期597-599,共3页
Based on the characteristics of the domestic sewage in rural district,four sewage treatment methods were analyzed.The results found that the optimum method was to process the domestic sewage on the spot,and it should ... Based on the characteristics of the domestic sewage in rural district,four sewage treatment methods were analyzed.The results found that the optimum method was to process the domestic sewage on the spot,and it should be popularized and applied in rural area. 展开更多
关键词 Rural domestic wastewater POLLUTION Treatment method
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活体转染肝细胞生长因子基因对小鼠急性肝功能衰竭的治疗作用 被引量:3
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作者 何勇 周峻 +3 位作者 陈勇 李海民 赵青川 窦科峰 《中华实验外科杂志》 CAS CSCD 北大核心 2005年第8期941-943,i0004,共4页
目的研究肝细胞生长因子(HGF)基因治疗对小鼠急性肝衰模型的治疗作用。方法构建人肝细胞生长因子(hHGF)表达载体,利用脂质体介导法在活体内转染肝细胞生长因子基因,利用荧光显微镜检测肝组织内绿色荧光蛋白(GFP)表达了解目的基因的表达... 目的研究肝细胞生长因子(HGF)基因治疗对小鼠急性肝衰模型的治疗作用。方法构建人肝细胞生长因子(hHGF)表达载体,利用脂质体介导法在活体内转染肝细胞生长因子基因,利用荧光显微镜检测肝组织内绿色荧光蛋白(GFP)表达了解目的基因的表达,用酶联免疫吸附试验(ELISA)法检测血清中人肝细胞生长因子的含量,通过观察小鼠急性肝衰模型的生存率、肝功能变化、肝组织病理改变来检测肝细胞生长因子基因对急性肝衰的治疗作用,通过检测肝组织中PCNA指数的变化了解肝脏的增殖能力的变化。结果荧光显微镜下可见肝组织内有绿色荧光蛋白的表达,转染人肝细胞生长因子基因后在血清中可检测到hHGF的表达,而且可持续1周以上,与对照组相比,转染hHGF基因组的生存率明显提高(40.0%vs11.5%,P<0.05),血清ALT、TBi明显降低,肝组织中PCNA指数也明显升高。结论活体转染肝细胞生长因子基因可获得表达,而且肝细胞生长因子基因对急性肝衰小鼠有治疗作用。 展开更多
关键词 体转 肝细胞生长因子 基因治疗 小鼠 急性肝功能衰竭 谷丙转氨酶
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An emergency decision support system for the marine pollution 被引量:1
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作者 宋军 郭俊如 +7 位作者 牟林 刘玉龙 李琰 袁泽轶 李欢 高佳 王国松 姚志刚 《Marine Science Bulletin》 CAS 2015年第2期56-67,共12页
The paper introduces the research progress in an emergency decision support system for marine pollution (EDSS) in China seas and elaborates on the possible role of the Neutron Activation Analysis (NAA) method ther... The paper introduces the research progress in an emergency decision support system for marine pollution (EDSS) in China seas and elaborates on the possible role of the Neutron Activation Analysis (NAA) method therein. To deal with the increasingly grave situation of offshore pollution, the EDSS for China seas has been researching and developing. Based on the prediction and analysis of the ocean three-dimensional current field, this system makes an inference on the possible path of diffusion and influencing area of marine pollutants and possible location of pollution source, and in combination with the environmentally sensitive information related to the technical integration of GIS, it puts forward the decision, making support for minimizing the hazard caused by pollutants. This system has been operationalized and running for many years on the Bohai and Huanghai seas' Marine Pollutants Prediction and Early-Warning, and it has achieved successful experience for many times in the emergencies of China's coastal pollution accidents. At present, the environmental guarantee system directed against heavy metals and radioactive pollutants is in the experimental stage. As the NAA method is especially applicable to the detection of part of heavy metals and radioactive substances, it is of very important practical value for the new system to realize the monitoring, prediction and early-warning of ocean heavy metals and radioactive pollutants. 展开更多
关键词 marine pollution Neutron Activation Analysis ocean modeling
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In vitro Antimicrobial Activity of Golden Buckwheat Extract and Therapeutic Effect of its Preparation on Chicken Mycoplasma Infection 被引量:1
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作者 史秋梅 高桂生 +1 位作者 张艳英 高光平 《Agricultural Science & Technology》 CAS 2013年第11期1632-1635,共4页
[Objective] This study aimed to identify the in vitro antibacterial activity of golden buckwheat extract and investigate the therapeutic effect of its preparation on mycoplasma infection. [Method] Through measuring th... [Objective] This study aimed to identify the in vitro antibacterial activity of golden buckwheat extract and investigate the therapeutic effect of its preparation on mycoplasma infection. [Method] Through measuring the minimum inhibitory concentra-tion, the in vitro antibacterial activity of golden buckwheat water extract was deter-mined; meanwhile, the therapeutic effect of golden buckwheat oral solution on my-coplasma infection was determined by artificial y infecting chickens with Mycoplasma gal isepticum culture. [Results] The golden buckwheat water extract had obvious in-hibitory effects against Pseudomonas aeruginosa and Escherichia coli, and a certain inhibitory effect on Salmonel a and Staphylococcus aureus; administration of golden buckwheat oral solution at the dose of 0.5%-1.0% continuously for 5 d had a good therapeutic effect against mycoplasma infection. [Conclusion] The study provides sci-entific bases for further study on the antibacterial activity of golden buckwheat and its application. 展开更多
关键词 Golden buckwheat(Fagopyrum dibotrys) Water extract Antibacterial ac-tivity Mycoplasma infection
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Preparation, Characterization, Photocatalytic Activity of S and Ag co-Doped Mesoporous Titania Photocatalysts
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作者 姚淑华 郑志慧 +1 位作者 陈爽 石中亮 《Chinese Journal of Chemical Physics》 SCIE CAS CSCD 2014年第6期732-738,I0004,共8页
In order to improve the photocatalytic performance of mesoporous titania under visible light, a series of photocatalysts of S and Ag co-doped mesoporous titania have been successfully prepared by template method using... In order to improve the photocatalytic performance of mesoporous titania under visible light, a series of photocatalysts of S and Ag co-doped mesoporous titania have been successfully prepared by template method using thiourea, AgNO3 and tetrabutyl titanate as precursors and Pluronic P123 (EO20PO70EO20) as template. Scanning electron microscopy (SEM), X-ray diffraction (XRD), nitrogen adsorption-desorption measurements, and UV-visible spectroscopy (UV-Vis) were employed to characterize the morphology, crystal structure, surface structure, and optical absorption properties of the samples. The microcrystal of the photocatalysts consisted of anatase phase and was approximately present in the form of spherical particle. The photocatalytic performance was studied by photodegradation methyl orange (MO) in water under UV and visible light irradiation. The calcination temperature and the doping content influenced the photoactivity. In addition, the possibility of cyclic usage of co-doped mesoporous titania was also confirmed, the photocatalytic activity of mesoporous titania remained above 89% of that of the fresh sample after being used four times. It was shown that the co-doped mesoporous titania could be activated by visible light and could thus be potentially applied for the treatment of water contaminated by organic pollutants. The synergistic effect of sulfur and silver co-doping played an important role in improving the photocatalytic activity. 展开更多
关键词 Mesoporous titania S and Ag co-doping Doped catalyst Photocatalytic activity Template method Dye decomposition
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From pollutant to solution of wastewater pollution: Synthesis of activated carbon from textile sludge for dye adsorption 被引量:16
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作者 Syieluing Wong Nurul Atiqah Najlaa Yac'cob +2 位作者 Norzita Ngadi Onn Hassan Ibrahim M.Inuwa 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2018年第4期870-878,共9页
Adsorption is an important process in wastewater treatment,and conversion of waste materials to adsorbent offers a solution to high material cost related to the use of commercial activated carbon.This study investigat... Adsorption is an important process in wastewater treatment,and conversion of waste materials to adsorbent offers a solution to high material cost related to the use of commercial activated carbon.This study investigated the adsorption behaviour of Reactive Black 5(RB5)and methylene blue(MB)onto activated carbon produced from textile sludge(TSAC).The activated carbon was synthesized through chemical activation of precursor followed with carbonization at 650℃ under nitrogen flow.Effects of time(0–200 min),pH(2–10),temperature(25–60℃),initial dye concentration(0–200 mg·L^-1),and adsorbent dosage(0.01–0.15 g)on dye removal efficiency were investigated.Preliminary screening revealed that TSAC synthesized via H2SO4activation showed higher adsorption behaviour than TSAC activated by KCl and ZnCl2.The adsorption capacity of TSAC was found to be 11.98 mg·g^-1(RB5)and 13.27 mg·g^-1(MB),and is dependent on adsorption time and initial dye concentration.The adsorption data for both dyes were well fitted to Freundlich isotherm model which explains the heterogeneous nature of TSAC surface.The dye adsorption obeyed pseudo-second order kinetic model,thus chemisorption was the controlling step.This study reveals potential of textile sludge in removal of dyes from aqueous solution,and further studies are required to establish the applicability of the synthesized adsorbent for the treatment of waste water containing toxic dyes from textile industry. 展开更多
关键词 Activated carbon Textile sludge Reactive Black 5 Methylene blue Adsorption
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Application of Tertiary Amine Cationic Polyacrylamide with High Cationic Degree in Salt-free Dyeing of Reactive Dyes 被引量:9
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作者 TENG Xiaoxu MA Wei ZHANG Shufen 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2010年第6期1023-1028,共6页
Tertiary amine cationic polyacrylamide with high cationization degree was used as a new cationic agent to pretreat cotton with dip-pad-bake method. The obtained cationic cotton was dyed with reactive dyes in the ab-se... Tertiary amine cationic polyacrylamide with high cationization degree was used as a new cationic agent to pretreat cotton with dip-pad-bake method. The obtained cationic cotton was dyed with reactive dyes in the ab-sence of electrolyte. The effects of the characteristics of the cationic agent and the pretreatment conditions on dye-ability of reactive dye were investigated. The results showed that the fixation and K/S values of the reactive dyes on the cationic cotton were improved compared with those on the untreated one in the presence of salt. Tests on fast-ness properties of the dyed cotton and fabric quality of the pretreated cotton were carried out and the results showed that wash and rub fastness of the salt-free dyeing were both satisfactory. And anti-crease property,tensile and tear strength,and handling of the cationic cotton were also good compared with that of the untreated one. 展开更多
关键词 tertiary amine cationic polyacrylamide reactive dye cotton fabric salt-free dyeing
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FIT interacts with AtbHLH38 and AtbHLH39 in regulating iron uptake gene expression for iron homeostasis in Arabidopsis 被引量:60
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作者 Youxi Yuan Huilan Wu +5 位作者 Ning Wang Jie Li Weina Zhao Juan Du Daowen Wang Hong-QingLing 《Cell Research》 SCIE CAS CSCD 2008年第3期385-397,共13页
Iron is an essential element for plant growth and development. Iron homeostasis in plants is tightly regulated at both transcriptional and posttranscriptional level. Several bHLH transcription factors involved in iron... Iron is an essential element for plant growth and development. Iron homeostasis in plants is tightly regulated at both transcriptional and posttranscriptional level. Several bHLH transcription factors involved in iron homeostasis have been identified recently. However, their regulatory mechanisms remain unknown. In this work, we demonstrate that the transcription factor FIT interacted with AtbHLH38 and AtbHLH39 and directly conferred the expression regulation of iron uptake genes for iron homeostasis in Arabidopsis. Yeast two-hybrid analysis and transient expression in Arabidopsis protoplasts showed that AtbHLH38 or AtbHLH39 interacted with FIT, a central transcription factor involved in iron homeostasis in Arabidopsis. Expression of FIT/AtbHLH38 or FIT/AtbHLH39 in yeast cells activated GUS expression driven by ferric chelate reductase (FRO2) and ferrous transporter (IRT1) promoters. Overexpression of FITwith either AtbHLH38 or AtbHLH39 in plants converted the expression of the iron uptake genes FRO2 and IRT1 from induced to constitutive. Further analysis revealed that FRO2 and IRT1 were not regulated at the posttranscriptional level in these plants because IRT1 protein accumulation and high ferric chelate reductase activity were detected in the overexpression plants under both iron deficiency and iron sufficiency. The double overexpression plants accumulated more iron in their shoots than wild type or the plants overexpressing either AtbHLH38, AtbHLH39 or FIT. Our data support that ferric-chelate reductase FRO2 and ferrous-transporter IRT1 are the targets of the three transcription factors and the transcription of FRO2 and IRT1 is directly regulated by a complex of FIT/AtbHLH38 or FIT/AtbHLH39. 展开更多
关键词 activation of iron uptake genes Arabidipsis thaliana bHLH transcription factor iron homeostasis protein-proteininteraction
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Analysis of infections in the first 3-month after living donor liver transplantation 被引量:27
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作者 Chuan Li Tian-Fu Wen +3 位作者 Kai Mi Chuan Wang Lu-Nan Yan Bo Li 《World Journal of Gastroenterology》 SCIE CAS CSCD 2012年第16期1975-1980,共6页
AIM:To identify factors related to serious postoperative bacterial and fungal infections in the first 3 mo after living donor liver transplantation(LDLT).METHODS:In the present study,the data of 207 patients from 2004... AIM:To identify factors related to serious postoperative bacterial and fungal infections in the first 3 mo after living donor liver transplantation(LDLT).METHODS:In the present study,the data of 207 patients from 2004 to 2011 were reviewed.The pre-,intra-and post-operative factors were statistically analyzed.All transplantations were approved by the ethics committee of West China Hospital,Sichuan University.Patients with definitely preoperative infections and infections within 48 h after transplantation were excluded from current study.All potential risk factors were analyzed using univariate analyses.Factors significant at a P < 0.10 in the univariate analyses were involved in the multivariate analyses.The diagnostic accuracy of the identified risk factors was evaluated using receiver operating curve.RESULTS:The serious bacterial and fungal infection rates were 14.01% and 4.35% respectively.Enterococcus faecium was the predominant bacterial pathogen,whereas Candida albicans was the most common fungal pathogen.Lung was the most common infection site for both bacterial and fungal infections.Recipient age older than 45 years,preoperative hyponatremia,intensive care unit stay longer than 9 d,postoperative bile leak and severe hyperglycemia were independent risk factors for postoperative bacterial infection.Massive red blood cells transfusion and postoperative bacterial infection may be related to postoperative fungal infection.CONCLUSION:Predictive risk factors for bacterial and fungal infections were indentified in current study.Pre-,intra-and post-operative factors can cause postoperative bacterial and fungal infections after LDLT. 展开更多
关键词 Bacterial infection Fungal infection Living donor liver transplantation
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Dual function of Arabidopsis A TAF1 in abiotic and biotic stress responses 被引量:60
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作者 Yaorong Wu Zhiyong Deng +8 位作者 Jianbin Lai Yiyue Zhang Cuiping Yang Bojiao Yin Qingzhen Zhao Ling Zhang Yin Li Chengwei Yang Qi Xie 《Cell Research》 SCIE CAS CSCD 2009年第11期1279-1290,共12页
NAC family genes encode plant-specific transcription factors involved in diverse biological processes. In this study, the Arabidopsis NAC gene ATAF1 was found to be induced by drought, high-salinity, abscisic acid (... NAC family genes encode plant-specific transcription factors involved in diverse biological processes. In this study, the Arabidopsis NAC gene ATAF1 was found to be induced by drought, high-salinity, abscisic acid (ABA), methyl jasmonate, mechanical wounding, and Botrytis cinerea infection. Significant induction of ATAF1 was found in an ABA-deficient mutant aba2 subjected to drought or high salinity, revealing an ABA-independent mechanism of expression. Arabidopsis ATAFl-overexpression lines displayed many altered phenotypes, including dwarfism and short primary roots. Furthermore, in vivo experiments indicate that ATAF1 is a bonafide regulator modulating plant responses to many abiotic stresses and necrotrophic-pathogen infection. Overexpression of ATAF1 in Arabidopsis increased plant sensitivity to ABA, salt, and oxidative stresses. Especially, ATAF1 overexpression plants, but not mutant lines, showed remarkably enhanced plant tolerance to drought. Additionally, ATAF1 overexpression enhanced plant susceptibility to the necrotrophic pathogen B. cinerea, but did not alter disease symptoms caused by avirulent or virulent strains of P. syringae pv tomato DC3000. Transgenic plants overexpressing ATAF1 were hypersensitive to oxidative stress, suggesting that reactive oxygen intermediates may be related to ATAFl-mediated signaling in response to both pathogen and abiotic stresses. 展开更多
关键词 abiotic stress ARABIDOPSIS ATAF1 biotic stress
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Salt-free reactive dyeing of betaine-modified cationic cotton fabrics with enhanced dye fixation 被引量:6
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作者 Wei Ma Mei Meng +1 位作者 Shumin Yan Shufen Zhang 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2016年第1期175-179,共5页
Novel cationic cotton fabrics were prepared by an efficient and simple one-step pad–dry–bake pretreatment process with betaine as cationic reagent. Ester bonds formed between cotton fibers and betaine hydrochloride ... Novel cationic cotton fabrics were prepared by an efficient and simple one-step pad–dry–bake pretreatment process with betaine as cationic reagent. Ester bonds formed between cotton fibers and betaine hydrochloride were proved by Fourier transformed infrared attenuated total reflection(FTIR-ATR) spectra. Moreover, the properties of the cationic fabrics, including X-ray Diffraction(XRD), tensile strength and whiteness and yellowness index,were investigated in comparison with that of the untreated ones. The cationic fabrics were applied in salt-free dyeing of C.I. Reactive Red 195, C.I. Reactive Yellow 145 and C.I. Reactive Blue 19. Different dye fixation processes were applied and compared for untreated and cationic cotton. Dye fixation and color fastness properties of the dyes were tested, and the results presented that dye fixation on the cationic fabrics in the absence of salt was improved with satisfactory light fastness property and applicable wash and rub fastnesses. 展开更多
关键词 Salt-free dyeing Betaine Cationic cotton Reactive dyes
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Antibacterial and antifungal activities of different parts of Tribulus terrestris L. growing in Iraq 被引量:6
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作者 Firas A. AL-BAYATI Hassan F. AL-MOLA 《Journal of Zhejiang University-Science B(Biomedicine & Biotechnology)》 SCIE CAS CSCD 2008年第2期154-159,共6页
Antimicrobial activity of organic and aqueous extracts from fruits, leaves and roots of Tribulus terrestris L., an Iraqi medicinal plant used as urinary anti-infective in folk medicine, was examined against I l specie... Antimicrobial activity of organic and aqueous extracts from fruits, leaves and roots of Tribulus terrestris L., an Iraqi medicinal plant used as urinary anti-infective in folk medicine, was examined against I l species of pathogenic and non-pathogenic microorganisms: Staphylococcus aureus, Bacillus subtilis, Bacillus cereus, Corynebacterium diphtheriae, Escherichia coli, Proteus vulgaris, Serratia marcescens, Salmonella typhimurium, Klebsiella pneumoniae, Pseudomonas aeruginosa and Candida albicans using microdilution method in 96 multiwell microtiter plates. All the extracts from the different parts of the plant showed antimicrobial activity against most tested microorganisms. The most active extract against both Gram-negative and Gram-positive bacteria was ethanol extract from the fruits with a minimal inhibitory concentration (MIC) value of 0.15 mg/ml against B. subtilis, B. cereus, P. vulgaris and C. diphtheriae. In addition, the same extract from the same plant part demonstrated the strongest antifungal activity against C. albicans with an MIC value of 0.15 mg/ml. 展开更多
关键词 Antimicrobial activity Tribulus terrestris Urinary tract infections
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Science Letters:Effect of nitrogen doping on the reduction of nitric oxide with activated carbon in the presence of oxygen 被引量:3
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作者 Xian-kai WAN Hui-xiang SHI Xue-quan ZOU Peng GE Da-hui WANG 《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》 SCIE EI CAS CSCD 2008年第1期113-117,共5页
Nitrogen doping of activated carbon (AC) was performed by annealing both in ammonia and nitric oxide, and the activities of the modified carbons for NO reduction were studied in the presence of oxygen. Results show ... Nitrogen doping of activated carbon (AC) was performed by annealing both in ammonia and nitric oxide, and the activities of the modified carbons for NO reduction were studied in the presence of oxygen. Results show that nitrogen atoms were incorporated into the carbons, mostly in the form of pyridinic nitrogen or pyridonic nitrogen. The effect of nitrogen doping on the activities of the carbons can be ignored when oxygen is absent, but the doped carbons show desirable activities in the low temperature regime (≤500 ℃) when oxygen is present. The role of the surface nitrogen species is suggested to promote the formation of NO2 in the presence of oxygen, and NO2 can facilitate decomposition of the surface oxygen species in the low temperature regime 展开更多
关键词 Activated carbon (AC) Nitric oxide DOPING REDUCTION
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Treatment of Benzene,Toluene and Xylene Contaminated Air in a Bioactive Foam Emulsion Reactor 被引量:4
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作者 Farshid Ghorbani Shahna Faride Golbabaei +3 位作者 Javad Hamedi Hossein Mahjub Hossein Reza Darabi Seyed Jamaladdin Shahtaheri 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2010年第1期113-121,共9页
A novel bioactive foam emulsion bioreactor for benzene,toluene and xylene(BTX)contaminated air streams treatment has been developed.The gas-liquid interfacial area by biocompatible foam and driving force for mass tran... A novel bioactive foam emulsion bioreactor for benzene,toluene and xylene(BTX)contaminated air streams treatment has been developed.The gas-liquid interfacial area by biocompatible foam and driving force for mass transfer by a water immiscible organic phase were increased in this reactor.The effect of several parameters such as gas residence time,oxygen content,and organic phase concentration on bioreactor performance was studied. Experimental results showed an average elimination capacity(EC)of 220 g·m3·h -1with removal efficiency(RE) of 89.59%for BTX inlet concentration of 1 g·m3at 15 s gas residence time in the bioreactor.The statistical developed model predicted that the maximum elimination capacity of the reactor for BTX could be reached to 423.45 g·m3·h -1.Continues operation of the bioreactor with high EC and RE was demonstrated by optimizing the operational parameters of the bioreactor.Overall the results suggest that the bioreactor developed can be very effective systems to treat BTX vapors. 展开更多
关键词 air pollution control bioactive foamed reactor biodegradation BTX
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Preparation by enzymolysis and bioactivity of iron complex of fish protein hydrolysate (Fe-FPH) from low value fish 被引量:21
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作者 邓尚贵 霍健聪 谢超 《Chinese Journal of Oceanology and Limnology》 SCIE CAS CSCD 2008年第3期300-306,共7页
Preparation of Fe^2+ chelate of fish protein hydrolysate (Fe-FPH) obtained from low value fish proteins was introduced and its bioactivity was studied by compound enzymolysis. The optimum conditions for hydrolysate... Preparation of Fe^2+ chelate of fish protein hydrolysate (Fe-FPH) obtained from low value fish proteins was introduced and its bioactivity was studied by compound enzymolysis. The optimum conditions for hydrolysate chelating Fe^2+ are DH (degree of hydrolysis) at 5%, pH 7.0, 20℃ and 15 min chelating time for FM (material not being defatted). Four types of Fe-FPH including CA (deposit after chelating), CB (deposit in 50% of absolute ethanol solution), CC (suspended deposit in 80% of absolute ethanol solution), and CD (bottom deposit in 80% of absolute ethanol solution) were fractionated with absolute ethanol from FM. Structural analysis through infra-red spectrum revealed that Fe^2+ was combined strongly with amino-group and carboxyl-group in each chelate and each Fe^2+ could form two five-member ring structures. All of the four chelates were shown more significant antioxidative activity and can be used as natural hydrophobic and hydrophilic antioxidant. Among all the chelates, the CB possesses the most effective antioxidative activity at 92% as high as that of a-tocopherol. Among all Fe-FPHs, only CD showed the most effective antibacterial activity against Escherichia coli, Staphylococcus aureus, Salmonella typhi, and Bacillus subtilis and can be used as natural antibacterial. It provides a more effective way for utilization of low value fish proteins and key information of Fe-FPH as additive in food industry. 展开更多
关键词 waste fish compound enzymes CHELATE STRUCTURE bioactivity fish protein
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