Pub Date : 2021-05-15DOI: 10.21608/EJCHEM.2021.71632.3572
R. Ali, K. Al-Niemi, Noor Mohammedthalji
Ascorbic acid is considered one of the weak phenolic acids, as practical experiments have shown that it can adhere to the adsorbent clay particles by forming electrostatic forces, hydrogen bonds, and the loss of positive protons if the adsorbent material contains electron density on the surface because it contains more than one hydroxyl alcohol and phenolic group. Phenolic hydroxyl groups act as weak acids that can lose a proton and convert to the phenoxide ion since ascorbic acid contains two contiguous phenolic hydroxyl groups. We note that the loss of hydrogen protonation gives a more stable product, which is 1,2 di-ketones. Therefore, the dissociation of ascorbic acid increases as the base medium increases. In this research we have studied the effect of adding sand (a natural substance) on the presence (activity) of ascorbic acid in the aqueous medium, adsorption technology was used in this study through which the most important factors affecting the adsorption process of ascorbic acid molecules were identified. The kinetic models were applied such as pseudo-first and second-order on the adsorption process, which is considered as a complex process that passes through several steps. In this study, the adsorption of ascorbic acid is in agreement with the pseudo-first and second-order models by obtaining a linear relationship with a high correlation coefficient as well as the experimental and theoretical capacity values of the adsorption process are equal. The Langmuir and Freundlich isotherms were used to describe the relationship between the adsorbent and adsorbate substance through the capacity of adsorption, the energy bonding, and favorite of adsorption, the results of adsorption are in agreement with Langmuir isotherm. The thermodynamic parameters (∆G, ∆H, ∆S) for the adsorption process were calculated. To obtain more information about the adsorption process, this study confirms some conclusions, the modified Arrhenius equation was applied to the results of the adsorption process, by studying the potential sticking of ions on the surface of the clay. This study comprehensively highlights the nature of the adsorption of ascorbic acid ions on the surface of the clay .The theoretical side of the ascorbic acid adsorption process for the oxides present on the adsorbent surfaces was studied using the (DFT) theory, and it was found that the theoretical results corresponded with the practical results. Ascorbic acid is transformed by negative charges and double bonds to a more stable di-ketone compound. The adsorption mechanism has been proposed, which corresponds to the practical results reached, Finally, to prove the adsorption mechanism, the resulting compound was diagnosed using an infrared spectrum.
{"title":"A practical and theoretical study of the mechanical kinetics of ascorbic acid adsorption on a new clay surface","authors":"R. Ali, K. Al-Niemi, Noor Mohammedthalji","doi":"10.21608/EJCHEM.2021.71632.3572","DOIUrl":"https://doi.org/10.21608/EJCHEM.2021.71632.3572","url":null,"abstract":"Ascorbic acid is considered one of the weak phenolic acids, as practical experiments have shown that it can adhere to the adsorbent clay particles by forming electrostatic forces, hydrogen bonds, and the loss of positive protons if the adsorbent material contains electron density on the surface because it contains more than one hydroxyl alcohol and phenolic group. Phenolic hydroxyl groups act as weak acids that can lose a proton and convert to the phenoxide ion since ascorbic acid contains two contiguous phenolic hydroxyl groups. We note that the loss of hydrogen protonation gives a more stable product, which is 1,2 di-ketones. Therefore, the dissociation of ascorbic acid increases as the base medium increases. In this research we have studied the effect of adding sand (a natural substance) on the presence (activity) of ascorbic acid in the aqueous medium, adsorption technology was used in this study through which the most important factors affecting the adsorption process of ascorbic acid molecules were identified. The kinetic models were applied such as pseudo-first and second-order on the adsorption process, which is considered as a complex process that passes through several steps. In this study, the adsorption of ascorbic acid is in agreement with the pseudo-first and second-order models by obtaining a linear relationship with a high correlation coefficient as well as the experimental and theoretical capacity values of the adsorption process are equal. The Langmuir and Freundlich isotherms were used to describe the relationship between the adsorbent and adsorbate substance through the capacity of adsorption, the energy bonding, and favorite of adsorption, the results of adsorption are in agreement with Langmuir isotherm. The thermodynamic parameters (∆G, ∆H, ∆S) for the adsorption process were calculated. To obtain more information about the adsorption process, this study confirms some conclusions, the modified Arrhenius equation was applied to the results of the adsorption process, by studying the potential sticking of ions on the surface of the clay. This study comprehensively highlights the nature of the adsorption of ascorbic acid ions on the surface of the clay .The theoretical side of the ascorbic acid adsorption process for the oxides present on the adsorbent surfaces was studied using the (DFT) theory, and it was found that the theoretical results corresponded with the practical results. Ascorbic acid is transformed by negative charges and double bonds to a more stable di-ketone compound. The adsorption mechanism has been proposed, which corresponds to the practical results reached, Finally, to prove the adsorption mechanism, the resulting compound was diagnosed using an infrared spectrum.","PeriodicalId":22429,"journal":{"name":"The Egyptian Journal of Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79706173","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}
Pub Date : 2021-05-05DOI: 10.21608/EJCHEM.2021.71885.3580
Mahmoud Alothman, W. Jawad, Asim A. Balakit, Mohammad Obies
{"title":"Synthesis, Characterization and Theoretical Study of Some Transition Metal Complexes with New Schiff Base Derived from 1,2,4-triazole","authors":"Mahmoud Alothman, W. Jawad, Asim A. Balakit, Mohammad Obies","doi":"10.21608/EJCHEM.2021.71885.3580","DOIUrl":"https://doi.org/10.21608/EJCHEM.2021.71885.3580","url":null,"abstract":"","PeriodicalId":22429,"journal":{"name":"The Egyptian Journal of Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82920452","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}
Pub Date : 2021-05-05DOI: 10.21608/EJCHEM.2021.72137.3595
M. El-Saber, Mohamed Diab, M. Hendawey, K. Farroh
{"title":"Magnetite Nanoparticles Different Sizes Effectiveness On Growth And Secondary Metabolites In Ginkgo Biloba L. Callus","authors":"M. El-Saber, Mohamed Diab, M. Hendawey, K. Farroh","doi":"10.21608/EJCHEM.2021.72137.3595","DOIUrl":"https://doi.org/10.21608/EJCHEM.2021.72137.3595","url":null,"abstract":"","PeriodicalId":22429,"journal":{"name":"The Egyptian Journal of Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88457232","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}
Pub Date : 2021-05-04DOI: 10.21608/EJCHEM.2021.70226.3546
Maha M. Salem, M. Farid, R. Elatif, A. Elkhateeb, E. Saleh, M. Marzouk, S. Hussein
Asphodelus species are among many plants used in traditional medicine, they are used by native peoples for various pathologies. Asphodelus aestivus Brot. is one of Asphodelus species which is considered an important wild medicinal plant growing mainly at Mediterranean region. The present study aims to investigate the chemical constituents and cytotoxic evaluation of A. aestivus flowers. Petroleum ether extract was analyzed by GC/MS assay which revealed the characterization of twenty nine compounds, representing 93.13% of total extract. Also, the chromatographic investigation of the hydromethanolic extract led to the isolation of ten phenolics. They were identified as kaempferol (1), kaempferol 3-Oglucoside (2), kaempferol 3,7-di-O-glucoside (3), luteolin 7-O-glucoside )4), isoorientin (5), isoorientin 7-O-glucoside (lutonarin) (6), caffeic acid (7) emodin (8), apigenin 7-O-glucoside (9) and isovitexin-7-O-glucoside (saponarin) (10), from which, five compounds ((2, 3, 6-8) have been isolated for the first time from A. aestivus. Furthermore, LC-ESI-MS chemical profiling managed to detect the minor contents and led to the annotation of thirteen additional metabolites. In addition, the petroleum ether and the hydromethanolic extracts were investigated against four human carcinoma cell lines; HepG2, HCT116, MCF-7 and A549 at concentration of 100 mg/mL. The results showed moderate % of inhibition against MCF-7 (63.8 and 68.4) followed by HepG2 (52.3 and 65.7), respectively. Both extracts showed weak inhibition (5.7-14.3%) on HCT-116 and A549. To the best of our knowledge, this is considered the first report of the chemical analysis and biological evaluation of A. aestivus flowers.
马鞭草是传统医学中使用的许多植物之一，它们被当地人用于治疗各种疾病。阿斯提乌斯。是一种重要的野生药用植物，主要生长在地中海地区。本研究旨在研究牡荆花的化学成分和细胞毒性评价。通过GC/MS对石油醚提取物进行分析，鉴定出29个化合物，占总提取物的93.13%。此外，对甲醇提取物进行色谱分析，分离出10种酚类物质。经鉴定为山奈酚(1)、山奈酚3-葡萄糖苷(2)、山奈酚3,7-二- o -葡萄糖苷(3)、木犀草素7- o -葡萄糖苷(4)、异荭草素(5)、异荭草素7- o -葡萄糖苷(lutonarin)(6)、咖啡酸(7)大黄素(8)、芹菜素7- o -葡萄糖苷(9)和异牡荆素7- o -葡萄糖苷(皂苷)(10)，其中5个化合物(2、3、6-8)为首次从山奈草中分离得到。此外，LC-ESI-MS化学分析成功地检测了微量含量，并导致了13个额外代谢物的注释。此外，还研究了石油醚和氢甲醇提取物对四种人癌细胞的作用;HepG2, HCT116, MCF-7和A549浓度为100 mg/mL。结果显示，MCF-7的抑制率中等，分别为63.8和68.4，其次是HepG2，分别为52.3和65.7。两种提取物对HCT-116和A549的抑制作用较弱(5.7% ~ 14.3%)。据我们所知，这被认为是第一份对aestivus花进行化学分析和生物学评价的报告。
{"title":"Chemical Analysis and Cytotoxic Evaluation of Asphodelus aestivus Brot. Flowers","authors":"Maha M. Salem, M. Farid, R. Elatif, A. Elkhateeb, E. Saleh, M. Marzouk, S. Hussein","doi":"10.21608/EJCHEM.2021.70226.3546","DOIUrl":"https://doi.org/10.21608/EJCHEM.2021.70226.3546","url":null,"abstract":"Asphodelus species are among many plants used in traditional medicine, they are used by native peoples for various pathologies. Asphodelus aestivus Brot. is one of Asphodelus species which is considered an important wild medicinal plant growing mainly at Mediterranean region. The present study aims to investigate the chemical constituents and cytotoxic evaluation of A. aestivus flowers. Petroleum ether extract was analyzed by GC/MS assay which revealed the characterization of twenty nine compounds, representing 93.13% of total extract. Also, the chromatographic investigation of the hydromethanolic extract led to the isolation of ten phenolics. They were identified as kaempferol (1), kaempferol 3-Oglucoside (2), kaempferol 3,7-di-O-glucoside (3), luteolin 7-O-glucoside )4), isoorientin (5), isoorientin 7-O-glucoside (lutonarin) (6), caffeic acid (7) emodin (8), apigenin 7-O-glucoside (9) and isovitexin-7-O-glucoside (saponarin) (10), from which, five compounds ((2, 3, 6-8) have been isolated for the first time from A. aestivus. Furthermore, LC-ESI-MS chemical profiling managed to detect the minor contents and led to the annotation of thirteen additional metabolites. In addition, the petroleum ether and the hydromethanolic extracts were investigated against four human carcinoma cell lines; HepG2, HCT116, MCF-7 and A549 at concentration of 100 mg/mL. The results showed moderate % of inhibition against MCF-7 (63.8 and 68.4) followed by HepG2 (52.3 and 65.7), respectively. Both extracts showed weak inhibition (5.7-14.3%) on HCT-116 and A549. To the best of our knowledge, this is considered the first report of the chemical analysis and biological evaluation of A. aestivus flowers.","PeriodicalId":22429,"journal":{"name":"The Egyptian Journal of Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77549889","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}
Pub Date : 2021-05-04DOI: 10.21608/EJCHEM.2021.71162.3567
I. Aiad, E. Khalil, Abd elfatah Farag, Adel Ahmed, Ali A. Abd-Elaal
{"title":"Ester-Gemini and Monomeric Cationic Surfactants; Synthesis, Characterization, Surface Parameters and Biological Activity","authors":"I. Aiad, E. Khalil, Abd elfatah Farag, Adel Ahmed, Ali A. Abd-Elaal","doi":"10.21608/EJCHEM.2021.71162.3567","DOIUrl":"https://doi.org/10.21608/EJCHEM.2021.71162.3567","url":null,"abstract":"","PeriodicalId":22429,"journal":{"name":"The Egyptian Journal of Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76067563","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}
Pub Date : 2021-05-04DOI: 10.21608/EJCHEM.2021.64230.3375
A. Ibrahim, F. Ashour, M. Gadallah
{"title":"Exergy Study of Sour Water Stripper Unit of Delayed Coker Unit in a Refinery plant: A Real Start-Up Plant","authors":"A. Ibrahim, F. Ashour, M. Gadallah","doi":"10.21608/EJCHEM.2021.64230.3375","DOIUrl":"https://doi.org/10.21608/EJCHEM.2021.64230.3375","url":null,"abstract":"","PeriodicalId":22429,"journal":{"name":"The Egyptian Journal of Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89930679","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}
Pub Date : 2021-05-04DOI: 10.21608/EJCHEM.2021.73347.3632
Sahar A.M.Hussein, Amani Elmosallamy, A. Soliman, M. El-Zaidy, Mohamed El Gerby
Mangifera indica (Tommy Atkins) peels, commonly known as mango, is a pharmacologically, ethnomedically, and phytochemically diverse plant. Peels is a major by-product during processing of mango fruit into pulp. In the present study, Thirteen pure bioactive compounds were isolated from methanolic peels extract. Six of them are new ellagitannins,namely, 1,2,3,4,6 -Penta-O-galloyl-ß-C1-glupyranose (3); 2,3,6-Tri-O-galloyl-(α/β)-C1-glucopyranose(4); 2,3-Di-O-galloyl-(α/β)C1-glucopyranose,Nilocitin(6);3,6-Di-O-galloyl-(α/β)-C1-glucopyranose(8);1,6 -Di-O-galloylβ-C1-glucopyranose (9) ; 1,3-Di-O-galloyl-β-C1-glucose (11), which were analyzed for the first time from M. indica (Tommy Atkins) peels. The ameliorative effect of the methanolic extract of M. indica (Tommy Atkins) peels towards the CCl4-induced hepatotoxicity in male Wistar rats through measuring certain biochemical parameters content in the liver were analyzed. The CCl4-treated rats showed a significant decline in the studied the serum levels of high-density lipoprotein (HDL), albumin (A) as well as the hepatic levels of glutathione (GSH) and activities of catalase (CAT), superoxide dismutase (SOD) , glutathione reductase (GR), elevation in the levels of total lipids (TL), triglycerides (TG), total cholesterol (TC), low-density lipoproteins (LDL), globulin (G), total bilirubin (TBil) , alanine and aspartate aminotransferase and alkaline phosphatase (ALAT and ASAT, ALP) and the hepatic levels of malondialdehyde (MDA). In contrast, the administration of methanol extract, notably improved all the studied parameters. This study showed that CCl4 administration to Wistar rats, at a high dose level, could induce a hepatic injury in addition to certain metabolic alterations. The work was extended to investigate tissue histopathology. Thus, results suggest that the peels extract can be a potential source of an attractive candidate for ameliorating of hepatotoxicity induced by CCl4 through scavenging free radicals, improved liver functions, and normalizing the liver histopathological architecture. Keywors: Mangifera indica (Tommy Atkins) peels, Phenolics, gallotannines, NMR spectroscopy, In Vivo Hepatoprotective activity
芒果皮，俗称芒果，是一种药理学、民族学和植物化学上多样化的植物。果皮是芒果果肉加工过程中的主要副产品。本研究从甲醇果皮提取物中分离得到13个纯活性化合物。其中6种是新的鞣花单宁，即1,2,3,4,6 -五- o -没食子酰-ß- c1 -葡聚糖(3);2、3、6-Tri-O-galloyl -(α/β)-C1-glucopyranose (4);2,3-二- o -没食子酰-(α/β) c1 -葡萄糖吡喃糖，Nilocitin(6);3,6-二- o -没食子酰-(α/β)- c1 -葡萄糖吡喃糖(8);1,6 -二- o -没食子酰β- c1 -葡萄糖吡喃糖(9);1,3-二- o -没食子酰-β- c1 -葡萄糖(11)，首次从籼稻(Tommy Atkins)果皮中分析。通过测定雄性Wistar大鼠肝脏中某些生化参数含量，分析了籼米果皮甲醇提取物对ccl4诱导的肝毒性的改善作用。ccl4处理大鼠血清高密度脂蛋白(HDL)、白蛋白(a)水平显著降低，肝脏谷胱甘肽(GSH)水平和过氧化氢酶(CAT)、超氧化物歧化酶(SOD)、谷胱甘肽还原酶(GR)活性显著降低，总脂质(TL)、甘油三酯(TG)、总胆固醇(TC)、低密度脂蛋白(LDL)、球蛋白(G)、总胆红素(TBil)水平显著升高。丙氨酸和天冬氨酸转氨酶和碱性磷酸酶(ALAT和ASAT, ALP)和肝脏丙二醛(MDA)水平。相比之下，甲醇提取物的施用显著改善了所有研究参数。本研究表明，高剂量CCl4给药Wistar大鼠除了引起一定的代谢改变外，还会引起肝损伤。这项工作扩展到研究组织病理学。因此，结果表明，果皮提取物可以通过清除自由基、改善肝功能和使肝脏组织病理结构正常化来改善CCl4诱导的肝毒性，这是一个有吸引力的潜在候选来源。关键词:芒果皮，酚类物质，没食子丹宁，核磁共振光谱，体内保肝活性
{"title":"Bioactive Compounds from Mango peels (Mangifera indica .Tommy Atkins) And Demonstration of its Cytotoxicity and CCl4 Induced Hepatotoxicity in Rat","authors":"Sahar A.M.Hussein, Amani Elmosallamy, A. Soliman, M. El-Zaidy, Mohamed El Gerby","doi":"10.21608/EJCHEM.2021.73347.3632","DOIUrl":"https://doi.org/10.21608/EJCHEM.2021.73347.3632","url":null,"abstract":"Mangifera indica (Tommy Atkins) peels, commonly known as mango, is a pharmacologically, ethnomedically, and phytochemically diverse plant. Peels is a major by-product during processing of mango fruit into pulp. In the present study, Thirteen pure bioactive compounds were isolated from methanolic peels extract. Six of them are new ellagitannins,namely, 1,2,3,4,6 -Penta-O-galloyl-ß-C1-glupyranose (3); 2,3,6-Tri-O-galloyl-(α/β)-C1-glucopyranose(4); 2,3-Di-O-galloyl-(α/β)C1-glucopyranose,Nilocitin(6);3,6-Di-O-galloyl-(α/β)-C1-glucopyranose(8);1,6 -Di-O-galloylβ-C1-glucopyranose (9) ; 1,3-Di-O-galloyl-β-C1-glucose (11), which were analyzed for the first time from M. indica (Tommy Atkins) peels. The ameliorative effect of the methanolic extract of M. indica (Tommy Atkins) peels towards the CCl4-induced hepatotoxicity in male Wistar rats through measuring certain biochemical parameters content in the liver were analyzed. The CCl4-treated rats showed a significant decline in the studied the serum levels of high-density lipoprotein (HDL), albumin (A) as well as the hepatic levels of glutathione (GSH) and activities of catalase (CAT), superoxide dismutase (SOD) , glutathione reductase (GR), elevation in the levels of total lipids (TL), triglycerides (TG), total cholesterol (TC), low-density lipoproteins (LDL), globulin (G), total bilirubin (TBil) , alanine and aspartate aminotransferase and alkaline phosphatase (ALAT and ASAT, ALP) and the hepatic levels of malondialdehyde (MDA). In contrast, the administration of methanol extract, notably improved all the studied parameters. This study showed that CCl4 administration to Wistar rats, at a high dose level, could induce a hepatic injury in addition to certain metabolic alterations. The work was extended to investigate tissue histopathology. Thus, results suggest that the peels extract can be a potential source of an attractive candidate for ameliorating of hepatotoxicity induced by CCl4 through scavenging free radicals, improved liver functions, and normalizing the liver histopathological architecture. Keywors: Mangifera indica (Tommy Atkins) peels, Phenolics, gallotannines, NMR spectroscopy, In Vivo Hepatoprotective activity","PeriodicalId":22429,"journal":{"name":"The Egyptian Journal of Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89514509","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}
Pub Date : 2021-05-03DOI: 10.21608/EJCHEM.2021.69873.3537
Аssyl Boshkayeva, Galiya Sayakova, L. Kiyekbayeva, L. Bekbayeva, Nurgul Dyusenova, G. Akhmetova, Assem Mamurova, A. Akhmetova
{"title":"An approach of quantum chemical methods for the development and substantiation of the structure of new piperidine compounds","authors":"Аssyl Boshkayeva, Galiya Sayakova, L. Kiyekbayeva, L. Bekbayeva, Nurgul Dyusenova, G. Akhmetova, Assem Mamurova, A. Akhmetova","doi":"10.21608/EJCHEM.2021.69873.3537","DOIUrl":"https://doi.org/10.21608/EJCHEM.2021.69873.3537","url":null,"abstract":"","PeriodicalId":22429,"journal":{"name":"The Egyptian Journal of Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73822136","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}
Pub Date : 2021-05-02DOI: 10.21608/EJCHEM.2021.66630.3433
M. A. Mamun, M. Alam, Ahsan Habib, Unesco Chakma, M. Sikder, A. Kumer
{"title":"Structural, electronic, optical properties and molecular dynamics study of WO3 W0.97Ag0.03O3 and W0.94Ag0.06O3 photocatalyst by the first principle of DFT study","authors":"M. A. Mamun, M. Alam, Ahsan Habib, Unesco Chakma, M. Sikder, A. Kumer","doi":"10.21608/EJCHEM.2021.66630.3433","DOIUrl":"https://doi.org/10.21608/EJCHEM.2021.66630.3433","url":null,"abstract":"","PeriodicalId":22429,"journal":{"name":"The Egyptian Journal of Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77253052","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}
Pub Date : 2021-05-01DOI: 10.21608/EJCHEM.2021.60695.3451
Sabeeh Jassim, A. Abbas, M. Al-Shakban, L. Ahmed
Thin films of nanometer sized cadmium sulfide were directly prepared by aerosol-assisted chemical vapor deposition (AACVD) method, cadmium ethyl xanthate complex was used as precursor material at 225 C, 250 C and 275 C. The thermal decomposition of complex was characterized by thermal analysis, (thermogravimetric analysis (TGA) and a differential scanning calorimetry (DSC)). The prepared CdS thin films have been characterized by XRD and SEMEDX analysis. TGA curves ensured that the rapid decomposition of [Cd(S2COEt)2] gives a CdS in single step between 150 C and 200 C. XRD patterns confirmed that the CdS particles crystalized as a hexagonal crystallographic phase at low temperatures. The grain size of particles increased with increasing the preparation temperatures from 225 C to 275 C,. The spherical CdS nanoparticals were observed in SEM analysis.
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