化学与化工:英文版最新文献_第6页

Monitoring Ambient Air Quality in the Carpathian Region of Ukraine 监测乌克兰喀尔巴阡地区的环境空气质量

化学与化工:英文版 Pub Date : 2018-01-28 DOI: 10.17265/1934-7375/2018.01.005

S. Kurta, I. Mykytyn, A. Voronych, Viktoria Ribun

{"title":"Monitoring Ambient Air Quality in the Carpathian Region of Ukraine","authors":"S. Kurta, I. Mykytyn, A. Voronych, Viktoria Ribun","doi":"10.17265/1934-7375/2018.01.005","DOIUrl":"https://doi.org/10.17265/1934-7375/2018.01.005","url":null,"abstract":"Ivano-Frankivsk oblast is located in the south-western part of Ukraine, close to the geographical center of Europe at the junction of the two major geographic units, the East European Plain and the Eastern Carpathians (the Carpathian region of Ukraine). Between September 2013 and September 2015, the expert group of the Department of Organic and Analytical Chemistry of Vasyl Stefanyk Precarpathian National University conducted the mobile monitoring of air cleanliness in Ivano-Frankivsk region; the authors monitored the level of air contamination with seven gases: carbon monoxide and dioxide, sulfur dioxide, nitrogen dioxide, hydrogen sulfide, ammonia, formaldehyde, beta-particles, and gamma radiation. For this purpose, there were used six automatic analyzers “Dozor-C-P”, the formaldehyde Gas Analyzer “МІС-98170”, and the radiometer “TERRA”. The monitoring resulted in the making of three maps of Ivano-Frankivsk region, on which the average levels of concentration of three particular gases (CO2, SO2, and CH2O) throughout all the districts of the oblast were marked. There was registered the excess of CH2O limits—the consequences of the presence of the chipboard and wood-fiber production, for which formaldehyde is used as a raw material. Also there was observed the excess of SO2 in the air caused by gas fumes from vehicles and thermal power stations.","PeriodicalId":67212,"journal":{"name":"化学与化工:英文版","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46046099","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Microwave Synthesis of Silver Nanoparticles Using Different Pentose Carbohydrates as Reducing Agents 以不同戊糖水合物为还原剂的微波合成银纳米粒子

化学与化工:英文版 Pub Date : 2018-01-28 DOI: 10.17265/1934-7375/2018.01.001

David S. Chung, Hanna Kim, Jonathan Ko, Justine Lee, Bryant Hwang, Sohyun Chang, Byungjun Kim, Sung‐Jae Chung

引用次数: 4

Effect of Alkali Concentration on Dyeing Cotton Knitted Fabrics with Reactive Dyes 碱浓度对棉针织物活性染料染色的影响

化学与化工:英文版 Pub Date : 2017-04-28 DOI: 10.17265/1934-7375/2017.04.004

Debasree Paul, S. Das, T. Islam, Md. Abu Bakar Siddiquee, M. Mamun

引用次数: 12

Chemical bromatological evaluation of biomass for silage of the winter cereals. 冬粮青贮生物量的化学色相学评价。

化学与化工:英文版 Pub Date : 2017-04-28 DOI: 10.17265/1934-7375/2017.04.002

Carlos Eugênio Fortes Teixeira, R. S. Fontaneli

引用次数: 0

Proximate, Mineral Composition and Phytochemical Screening of Some Selected Spices of Ibadan Metropolis, Oyo State, Southwest, Nigeria 尼日利亚西南部奥约州伊巴丹大都会部分香料的近缘、矿物组成和植物化学筛选

化学与化工:英文版 Pub Date : 2017-04-28 DOI: 10.17265/1934-7375/2017.04.003

A. Adebola, Davies Caleb Adeosun, Abiona Dupe Lydia

{"title":"Proximate, Mineral Composition and Phytochemical Screening of Some Selected Spices of Ibadan Metropolis, Oyo State, Southwest, Nigeria","authors":"A. Adebola, Davies Caleb Adeosun, Abiona Dupe Lydia","doi":"10.17265/1934-7375/2017.04.003","DOIUrl":"https://doi.org/10.17265/1934-7375/2017.04.003","url":null,"abstract":"Spices which are widely used in Southwest Nigeria have aroma, enhance taste of food and possess medicinal values. Proximate, mineral composition and phytochemical screening of ten randomly selected spices were carried out. Recommended procedures were used for the analyses. Mineral composition was determined using flame photometer, colorimeter and (Atomic Absorption Spectrophotometer). The proximate composition showed that protein was high at 12.04% in Zingiber officinale and low at 2.1% in Xylopia aethiopica. Ocimium gratissium contained high moisture content at 82.1%, while Tetrapleura tetraptera had the least value of 3.5%. High ash content was recorded in Ocimum gratissium at 13.68% and lowest 0.98% in Allium cepa. For carbohydrate, Allium cepa had the highest value of 78.36%, while Allium setiva had the least value of 19.48%. Mineral composition showed high value of calcium 712 mg/100g, magnesium 172.2 mg/100g, potassium 868.5 mg/100g, sodium 75.85 mg/100g, and manganese 95.38 mg/100g in Allium sativa, Xylopia aethiopica, Momodara myristica, Ocimum gratissimum, Tetrapleura tetraptera respectively. Aframomium meleghueta had high value of iron and zinc at 85 mg/100g and 97 mg/100g respectively and also high presence of alkaloids, glycosides, saponins and tannis. High values of saponins and triterpenoids were observed in Zingiber officinale and Ocimum gratissimum respectively. This study showed that spices have greater use in medicine and as food supplement.","PeriodicalId":67212,"journal":{"name":"化学与化工:英文版","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2017-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42971125","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Biological Proof of the Mechanism of “Quantum Theory” of Biological Processes in Vivo 体内生物过程“量子理论”机制的生物学证明

化学与化工:英文版 Pub Date : 2017-04-28 DOI: 10.17265/1934-7375/2017.04.005

E. A. Tumasyan

引用次数: 0

Substituent Effect of Chiraldiphenyl Salen Metal (M = Fe(II), Co(II), Ni(II), Cu(II), Zn(II)) Complexes for New Conceptual DSSC Dyes 手性二苯基Salen金属(M = Fe(II)， Co(II)， Ni(II)， Cu(II)， Zn(II))配合物对新概念DSSC染料的取代效应

化学与化工:英文版 Pub Date : 2017-04-28 DOI: 10.17265/1934-7375/2017.04.001

S. Yamane, Yuuki Hiyoshi, Shinnosuke Tanaka, Shun Ikenomoto, T. Numata, K. Takakura, T. Haraguchi, M. Palafox, M. Hara, M. Sugiyama, T. Akitsu

引用次数: 4

Tunable Self-assembled Weak Polyelectrolyte Brushes 可调谐自组装弱聚电解质刷

化学与化工:英文版 Pub Date : 2017-03-28 DOI: 10.17265/1934-7375/2017.03.007

C. Ioannis

{"title":"Tunable Self-assembled Weak Polyelectrolyte Brushes","authors":"C. Ioannis","doi":"10.17265/1934-7375/2017.03.007","DOIUrl":"https://doi.org/10.17265/1934-7375/2017.03.007","url":null,"abstract":"The authors have investigated the pH and ionic strength response of self-assembled layers formed by adsorption of amphiphilic weak polyelectrolytes. Using the SFA (Surface Forces Apparatus) the authors measured force-distance profiles of poly (isoprene)-poly (acrylic acid) block copolymers adsorbed on mica. Also by Atomic Force Microscopy the authors captured single polyelectrolyte molecule adsorbed on a surface. The effect of salt concentration (Cs) and pH upon the height of the brush layers was explored mainly by measuring the forces between two adsorbed polyelectrolyte brushes. At pH = 4 our results are in good agreement with the scaling prediction 1/3 0 s L C   . Changing the pH from 4 to 10 causes a remarkable swelling of the polymer layer, but only a weak dependence on salt concentration was detected at the higher pH. This can be attributed to the degree of dissociation, which depends on the local pH value. At low pH the polyelectrolyte chains have a low charge density, while on increasing the pH the degree of dissociation rises, and the increased charge density is followed by swelling of the adsorbed layer. The local concentration of ions in the brush is now greater than that of pH = 4 and approximately equivalent to 0.3 M. So the swelling is only weakly dependent on salt concentration in the range 0.01-1.0 M. The results demonstrate the tunable nature of such self-assembled polyelectrolyte brushes whose height and range of interactions, can be systematically controlled by adjusting the pH and ionic strength of the medium.","PeriodicalId":67212,"journal":{"name":"化学与化工:英文版","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2017-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49370986","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhancing Nuclear Security System of Irradiation Facility SIBO INRA/Tangier Morocco 加强摩洛哥丹吉尔辐照设施的核安全体系

化学与化工:英文版 Pub Date : 2017-03-28 DOI: 10.17265/1934-7375/2017.03.003

Mouhib Mohammed, Chentouf Mouad, G. Amina, R. Vlaev

{"title":"Enhancing Nuclear Security System of Irradiation Facility SIBO INRA/Tangier Morocco","authors":"Mouhib Mohammed, Chentouf Mouad, G. Amina, R. Vlaev","doi":"10.17265/1934-7375/2017.03.003","DOIUrl":"https://doi.org/10.17265/1934-7375/2017.03.003","url":null,"abstract":"Around the world, radioactive sources have been widely used for decades to benefit humankind; industry food; health, etc. However, the malicious use of radiological sources poses a significant threat globally. As Irradiation facility for research the goal of this paper is to show a case study of application of nuclear security and nuclear security culture code of contact in irradiation facility using cobalt 60. And it will show the necessary work done to achieve the goal of protection of radioactive material and continue working in safe conditions. This objective could not be achieved without the collaboration of all department involved in security and nuclear safety. In this work we applied the nuclear security and nuclear security culture procedures in order to define the type of system used to achieve the global objective in accordance with Global Threat Reduction Program to reduce the threat of a RDD (Radiological Dispersion Device) in collaboration with The United States Department of Energy’s NNSA (National Nuclear Security Administration). The objective of this paper is to share a local experience in upgrading security with return of experience in practice and very good collaboration with general direction of national security and all departments involved in security and nuclear safety.","PeriodicalId":67212,"journal":{"name":"化学与化工:英文版","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2017-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43480356","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

A Rapid Extraction Procedure for the Determination of Strontium-90 in Water Samples 快速提取法测定水样中锶-90

化学与化工:英文版 Pub Date : 2017-03-28 DOI: 10.17265/1934-7375/2017.03.006

M. Zehringer, J. Abraham, F. Kammerer, V. Syla, M. Wagmann

引用次数: 4