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CO_x-Free Hydrogen and Carbon Nanofibers Produced from Direct Decomposition of Methane on Nickel-Based Catalysts

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Journal of Natural Gas Chemistry 2006年第4期15卷 253-258页

作者： Siang-Piao Chai sha.if hussein sha.if zein Abdul Rahman Mohamed School of Chemical Engineering Universiti Sains MalaysiaEngineering Campus Seri Ampangan14300 Nibong TebalSPS Penang Malaysia

Direct decomposition of methane was carried out using a fixed-bed reactor at 700 ℃ for the production of COx-free hydrogen and carbon nanofibers. The catalytic performance of NiO-M/SiO2 catalysts （where M=AgO, CoO, CuO, FeO, MnOx and MoO） in methane decomposition was investigated. The experimental results indicate that among the tested catalysts, NiO/SiO2 promoted with CuO give the highest hydrogen yield. In addition, the examination of the most suitable catalyst support, including Al2O3, CeO2, La2O3, SiO2, and TiO2, shows that the decomposition of methane over NiO-CuO favors SiOx support. Furthermore, the optimum ratio of NiO to CuO on SiO2 support for methane decomposition was determined. The experimental results show that the optimum weight ratio of NiO to CuO fell at 8：2 （w/w） since the highest yield of hydrogen was obtained over this catalyst.

关键词： methane decomposition hydrogen carbon nanofibers supported catalyst

Antioxidant activity of water-soluble polysaccharide extracted from Eucalyptus cultivated in Lebanon

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Asian Pacific Journal of Tropical Biomedicine 2017年第2期7卷 157-160页

作者： Marianne Haddad Salam zein Hawraa shahrour Kamar Hamadeh Nadine Karaki hussein Kanaan Laboratory of Chemical Synthesis and Extraction of Polysaccharides from Seaweed Faculty of PharmacyLebanese UniversityHadath CampusBeirutLebanon Laboratory of Microbiology Department of Life and Earth SciencesFaculty of Sciences ILebanese UniversityHadath CampusBeirutLebanon

Objective: To extract and identify the chemical composition of the polysaccharide isolated from the Eucalyptus cultivated in Lebanon and to evaluate its antioxidant ***: The water-soluble polysaccharide was isolated from Eucalyptus leaves, and its structure was identified by Fourier transform infrared spectroscopy, proton nuclear magnetic resonance, and carbon-13 nuclear magnetic resonance. The antioxidant activity of the active ingredient was screened for its radical scavenging ability using 2,2-diphenyl-1-picryl-hydrazyl radical(DPPH) ***: The results of the DPPH test have shown that fucoidan, the polysaccharide isolated from Eucalyptus, exhibited almost the same antioxidant activity against DPPH$as the ascorbic acid did at 100 mg/***: This natural molecule extracted from a medicinal plant has a promising antioxidant activity and could be used in pharmaceutical and medical applications.

关键词： Eucalyptus Polysaccharide Fucoidan Antioxidant

Production of High Purity Multi-Walled Carbon Nanotubes from Catalytic Decomposition of Methane

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Journal of Natural Gas Chemistry 2006年第4期15卷 266-270页

作者： Kong Bee Hong Aidawati Azlin Binti Ismail Mohamed Ezzaham Bin Mohd Mahayuddin Abdul Rahman Mohamed sha.if hussein sha.if zein School of Chemical Engineering Engineering CampusUniversiti Sains Malaysia14300 Nibong TebalSeberang Perai SelatanPulau PinangMalaysia

Acid-based purification process of multi-walled carbon nanotubes （MWNTs） produced via catalytic decomposition of methane with NiO/TiO2 as a catalyst is described. By combining the oxidation in air and the acid refluxes, the impurities, such as amorphous carbon, carbon nanoparticles, and the NiO/TiO2 catalyst, are eliminated. Scanning electron microscopy （SEM） and transmission electron microscopy （TEM） images confirm the removal of the impurities. The percentage of the carbon nanotubes purity was analyzed using thermal gravimetric analysis （TGA）. Using this process, 99.9 wt% purity of MWNTs was obtained.

关键词： multi-walled carbon nanotubes purification acid refluxes oxidation methane decomposition

Simple Nutritional and Inflammatory Markers Associated with Bed Sores in Elderly Stroke People

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Advances in Aging Research 2016年第2期5卷 58-69页

作者： Mohammed zein Abdulwadood Safaa hussein Ali Geriatrics and Gerontology Department Faculty of Medicine Ain Shams University Cairo Egypt

Background: Bed sores are major burden to hospital care and usually associated with worse prognosis and longer hospital stay. Aims: To evaluate whether simple biochemical inflammatory and nutritional markers would differ between those with bedsores and those without in elderly stroke patients and if there is a distinction between recent bed sore stroke patients and old bed sore stroke patients as regard these biomarkers. Methods: 80 Stroke elderly patients were enrolled and divided into four groups: patients with recent stroke who developed bedsores, patients with recent stroke who did not develop bedsores, patients with old stroke who developed bedsores and patients with old stroke who did not develop bedsores. Nutritional markers (albumin, total protein, magnesium, iron, total iron binding capacity (TIBC), hemoglobin and cholesterol) and inflammatory markers (total leucocyte count, neutrophil to lymphocyte ratio and ferritin) were compared between the four groups. Results: Concerning nutritional markers, albumin (P =< 0.001), Alb/Pr ratio (P =< 0.001), TIBC (P =< 0.001) and cholesterol (P = 0.005) are lower in the acute stroke with bed sore patients versus acute stroke without bed sore. Lower albumin (P =< 0.001) is only found in comparison between chronic stroke with bed sore patients and chronic without bed sore patients. There is a difference between acute stroke with bed sore and chronic stroke with bed sore concerning albumin (P =< 0.001), TIBC (P =< 0.001) and TG (p =< 0.001). Albumin is lower while TG and TIBC are higher in those with acute stroke with bed sores. Regarding inflammatory markers, high neutrophil and ferritin (p =< 0.001) were found in acute stroke with bed sore patients versus acute stroke without bed sore. No difference was found between chronic stroke with bed sore patients and chronic stroke without bed sore patients. Acute stroke with bed sore group has higher TLC, neutrophil, neut/lymph ratio and ferritin (p =< 0.001) than chronic stroke

关键词： Bedsores Nutritional Inflammatory Stroke Elderly

The corrosion scenario in human body: Stainless steel 316L orthopaedic implants

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Natural Science 2012年第3期4卷 184-188页

作者： Kean-Khoon Chew sha.if hussein sha.if zein Abdul Latif Ahmad School of Chemical Engineering Engineering Campus Universiti Sains Malaysia Penang Malaysia

As the world’s populations increase and age, there is a parallel increase in the number of medical procedures addressed to bone related injuries. It is estimated that approximately 1 million of orthopaedic implant surgeries in association with total joint replacements are needed every year. This number is expected to double between 1999 and 2025 as a result of increasing numbers of musculoskeletal injuries (i.e., due to routine activities such as work, sport, etc.) and musculoskeletal diseases (i.e., such as osteoporosis, arthritis and bursitis due to increase age). Consequently, the increase demand for better quality of life has necessarily led people to opt for high quality orthopaedic devices for early recovery and speedy resumption of their routine activities. Unfortunately in the present time, it has been found that the current used orthopaedic implants have the tendencies to fail after long period of usage, due to the corrosion issue of implant in the human body. Therefore, this paper provides a simple overview about the corrosion issue of stainless steel (SS) 316L as implants in human body. Electrophoretic deposition (EPD) of hydroxypaptite (HA) bioceramic was proposed as the approach to minimize the corrosion phenomena. Additionally, the corrosion testing of HA coated SS 316L in comparison to pristine SS 316L was also performed and discussed.

关键词： Corrosion Metallic Implant Stainless Steel Electrophoretic Deposition Hydroxyapatite

葡萄糖糖基化改性玉米醇溶蛋白膜的物化性质及在胶囊壳中的应用

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中国油脂 2019年第12期44卷 76-80,91页

作者：郭浩张慧君陈又铭李萍王一正沙迪昕齐齐哈尔大学食品与生物工程学院黑龙江齐齐哈尔161006 黑龙江省果蔬杂粮饮品工程技术研究中心黑龙江齐齐哈尔161006

以葡萄糖为原料对玉米醇溶蛋白进行糖基化改性,以抗拉强度为指标,考察最佳改性成膜工艺,并通过差示扫描量热法(DSC)、傅里叶变换红外光谱(FT-IR)、扫描电子显微镜(SEM)对改性蛋白膜的物化性质进行研究。结果表明:在葡萄糖与玉米醇溶蛋... 详细信息

以葡萄糖为原料对玉米醇溶蛋白进行糖基化改性,以抗拉强度为指标,考察最佳改性成膜工艺,并通过差示扫描量热法(DSC)、傅里叶变换红外光谱(FT-IR)、扫描电子显微镜(SEM)对改性蛋白膜的物化性质进行研究。结果表明:在葡萄糖与玉米醇溶蛋白质量比1∶10、超声功率450 W、反应时间30 min的条件下,制得玉米醇溶蛋白-葡萄糖膜的抗拉强度达到34.06 MPa,接枝度为63.05%。玉米醇溶蛋白以共价键的方式与葡萄糖结合,使糖基化改性产物结构更加稳定。改性蛋白膜的表面较改性前更加平整,凹陷凸起基本消失。玉米醇溶蛋白-葡萄糖膜热变性温度从改性前的157.95℃升高到164.26℃,膜的热稳定性提高。经葡萄糖糖基化改性后的玉米醇溶蛋白胶囊壳指标符合《中华人民共和国药典》(2015版)要求。

关键词：玉米醇溶蛋白糖基化改性葡萄糖物化性质

湿法糖基化改性玉米醇溶蛋白的物化特性及其在胶囊壳中的应用

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中国粮油学报 2018年第9期33卷 55-60,69页

作者：张慧君陈又铭沙迪昕姜宁宁王文霞宫春宇齐齐哈尔大学食品与生物工程学院齐齐哈尔161006

利用麦芽糖浆对玉米醇溶蛋白进行湿法糖基化改性,以抗张强度为指标,考察改性后蛋白膜的机械性能,通过SDS-PAGE、DSC、傅里叶红外和扫描电子显微镜等手段考察蛋白改性前后的物化性质。结果表明:改性后蛋白膜较传统的明胶膜和纯玉米醇溶... 详细信息

利用麦芽糖浆对玉米醇溶蛋白进行湿法糖基化改性,以抗张强度为指标,考察改性后蛋白膜的机械性能,通过SDS-PAGE、DSC、傅里叶红外和扫描电子显微镜等手段考察蛋白改性前后的物化性质。结果表明:改性后蛋白膜较传统的明胶膜和纯玉米醇溶蛋白膜机械性能有较大提高。对SDS-PAGE电泳谱图分析可知玉米醇溶蛋白与麦芽糖浆进行了有效的糖基化接合。经傅里叶红外光谱扫描,可知改性后的玉米醇溶蛋白的化学结构发生了变化。差示量热扫描仪分析表明湿法改性的产物zein-MS膜热变性温度从由为改性前的188. 47℃提高到了206. 87℃,增加了膜的稳定性。扫描电子显微镜发现改性后膜的表面较改性前更加平整,孔洞基本消失。将玉米醇溶蛋白改性产物制成胶囊壳,以常规明胶胶囊壳作对照,参考《中华药典》(2015版)的相关检测指标进行检测,各项指标均合格。

关键词：玉米醇溶蛋白麦芽糖浆糖基化改性物化特性胶囊壳

玉米醇溶蛋白菊粉糖基化改性成膜工艺及其性能研究

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食品与机械 2019年第7期35卷 134-138页

作者：陈又铭张慧君郭浩沙迪昕王一正齐齐哈尔大学食品与生物工程学院黑龙江齐齐哈尔161006 黑龙江省果蔬杂粮饮品工程技术研究中心黑龙江齐齐哈尔161006

以菊粉作为羰基供体,与玉米醇溶蛋白的氨基进行糖基化反应,探讨改性成膜的最佳工艺,并对膜的各种性能进行了检测。结果表明:当物料比(蛋白/糖)101(g/g),反应溶液pH6,反应时间48h制得的玉米醇溶蛋白—菊粉共价交联膜达到最佳状态,该条件... 详细信息

以菊粉作为羰基供体,与玉米醇溶蛋白的氨基进行糖基化反应,探讨改性成膜的最佳工艺,并对膜的各种性能进行了检测。结果表明:当物料比(蛋白/糖)101(g/g),反应溶液pH6,反应时间48h制得的玉米醇溶蛋白—菊粉共价交联膜达到最佳状态,该条件下膜的抗拉强度为10.12MPa,接枝度为37.5%。改性后的玉米醇溶蛋白膜的透光率、阻水、阻油、阻氧性均优于原玉米醇溶蛋白膜。

关键词：玉米醇溶蛋白菊粉糖基化性能

麦芽糖浆糖基化改性玉米醇溶蛋白及在胶囊壳中的应用

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食品科学 2018年第14期39卷 29-35页

作者：张慧君陈又铭辛德慧沙迪昕王文霞姜宁宁郭浩张慧敏齐齐哈尔大学食品与生物工程学院黑龙江齐齐哈尔161006

利用氨基酸分析仪和十二烷基硫酸钠-聚丙烯酰胺凝胶电泳(sodium dodecyl sulfate-polyacrylamide gel electrophoresis,SDS-PAGE)确定提取玉米醇溶蛋白试剂,采用麦芽糖浆通过湿法糖基化方法改性玉米醇溶蛋白制备胶囊壳,对改性产物进行... 详细信息

利用氨基酸分析仪和十二烷基硫酸钠-聚丙烯酰胺凝胶电泳(sodium dodecyl sulfate-polyacrylamide gel electrophoresis,SDS-PAGE)确定提取玉米醇溶蛋白试剂,采用麦芽糖浆通过湿法糖基化方法改性玉米醇溶蛋白制备胶囊壳,对改性产物进行机械性能分析。结果表明:以70%乙醇溶液提取的玉米醇溶蛋白做糖基化反应的氨基供体,当玉米醇溶蛋白-麦芽糖浆质量比为11∶1、pH 9、超声功率400 W、加热时间15 min条件下,接枝度达34.96%,抗拉强度为9.22 MPa,约为改性前(4.2 MPa)的2倍。SDS-PAGE糖蛋白染色胶片证明了糖分子和蛋白质分子进行有效的接合。将玉米醇溶蛋白改性产物制成胶囊壳,按照《中华人民共和国药典》(2015版)检测胶囊壳规格外观形态、颜色、尺寸、松紧度、脆碎度、干燥质量损失、灼烧残渣和透明度等性能指标,全部合格。

关键词：玉米醇溶蛋白糖基化机械性能胶囊壳