Pub Date : 2021-01-01DOI: 10.21608/jsrs.2021.210654
E. Elgarhy, M. El-Nahass, H. A. Zayed, .. A. Ali
The structural properties of 1',3'-dihydro-1',3',3'-trimethyl-6-nitrospiro [2H1-benzopyran-2,2'-[2H]indole] (DTNBI) characterized using X-ray diffraction. DTNBI's powder has a monoclinic polycrystalline structure. The DTNBI's lattice constant of unit cell are ( a = 29.912 Å, b = 18.815 Å, and c = 13.062 Å). The mean crystallite size and strain were evaluated using the formula of Scherrer, WilliamsonHall, and Size-Strain plots methods. In the frequency range of 40 to 5×10 Hz, the dependence of ac conductivity was studiedforthe bulk DTNBI upon different temperatures (303-363 K). The prevailing mechanism for the ac conduction was the correlated barrier hopping model for bulk DTNBI.The dielectric constant and the dielectric loss were also studied. The dielectric polarization mechanism of bulk DTNBI used to explain the behavior of the real, ε1, and imaginary, ε2, components of the complex dielectric constant. Reliance of dc and ac conductivity of bulk DTNBI follows the law of Arrhenius. The activation energy of both dc and ac conduction for bulk DTNBI were calculated and the dielectric characteristics were examined via complex electric modulus formalism.
用x射线衍射表征了1'，3'-二氢-1'，3'，3'-三甲基-6-硝基螺[2h1 -苯并吡喃-2,2'-[2H]吲哚](DTNBI)的结构性质。DTNBI粉末具有单斜晶多晶结构。DTNBI的晶格常数为(a = 29.912 Å， b = 18.815 Å， c = 13.062 Å)。采用Scherrer, WilliamsonHall公式和尺寸-应变图方法评估平均晶粒尺寸和应变。在40 ~ 5×10 Hz的频率范围内，研究了不同温度(303 ~ 363 K)下块体DTNBI的交流电导率的变化规律，认为块体DTNBI的交流电导率的主要机制是相关跳垒模型。并对介电常数和介电损耗进行了研究。用块体DTNBI的介电极化机理解释复介电常数的实部ε1和虚部ε2的行为。块体DTNBI的直流电导率和交流电导率的依赖关系遵循Arrhenius定律。计算了块体DTNBI的直流和交流传导活化能，并通过复电模量形式分析了介电特性。
{"title":"Characterization of structural, electrical conductivity and dielectric properties of 1',3'-dihydro-1',3',3'-trimethyl-6-nitrospiro[2H-1benzopyran-2,2'[2H] indole] compound","authors":"E. Elgarhy, M. El-Nahass, H. A. Zayed, .. A. Ali","doi":"10.21608/jsrs.2021.210654","DOIUrl":"https://doi.org/10.21608/jsrs.2021.210654","url":null,"abstract":"The structural properties of 1',3'-dihydro-1',3',3'-trimethyl-6-nitrospiro [2H1-benzopyran-2,2'-[2H]indole] (DTNBI) characterized using X-ray diffraction. DTNBI's powder has a monoclinic polycrystalline structure. The DTNBI's lattice constant of unit cell are ( a = 29.912 Å, b = 18.815 Å, and c = 13.062 Å). The mean crystallite size and strain were evaluated using the formula of Scherrer, WilliamsonHall, and Size-Strain plots methods. In the frequency range of 40 to 5×10 Hz, the dependence of ac conductivity was studiedforthe bulk DTNBI upon different temperatures (303-363 K). The prevailing mechanism for the ac conduction was the correlated barrier hopping model for bulk DTNBI.The dielectric constant and the dielectric loss were also studied. The dielectric polarization mechanism of bulk DTNBI used to explain the behavior of the real, ε1, and imaginary, ε2, components of the complex dielectric constant. Reliance of dc and ac conductivity of bulk DTNBI follows the law of Arrhenius. The activation energy of both dc and ac conduction for bulk DTNBI were calculated and the dielectric characteristics were examined via complex electric modulus formalism.","PeriodicalId":16981,"journal":{"name":"Journal of Scientific Research in Science","volume":"298 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77191637","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 : 2021-01-01DOI: 10.21608/jsrs.2021.46865.1037
basma ibrahime, E. Kishar, Mohamed Heikal, S. Awad
The present research aims to explain the physico-chemical and mechanical characteristics of alkali activated slag geopolymer binder (AASGB). Commercial sodium hydroxide (SH) and sodium silicate liquid (SSL) are utilized as an alkaline activator at different temperature namely 25C and 65C. The hydration characteristics and physico-mechanical properties are illustrated through the determination of combined water contents Wn), combined slag, total porosity (TP), compressive strength (CS), bulk density (BD) and XRD analysis as spectroscopic tools upto 180 days. The durability of the AASGB against aggressive ions (sulphate and chloride ions ) as well as effect of elevated temperatures upto 1000C are studied. The activated binders are immersed under 5% MgSO4 and/or 5%MgCl2 solutions upto12 months. The data showed that the higher concentration of SH (1mol/kg) at 65C exhibited the highest resistance to elevated temperature upto 1000C as well as given a high resistance against sulphate and chloride attack.
{"title":"Effect of sulphate, chloride and elevated temperature on the properties of Egyptian slag binder","authors":"basma ibrahime, E. Kishar, Mohamed Heikal, S. Awad","doi":"10.21608/jsrs.2021.46865.1037","DOIUrl":"https://doi.org/10.21608/jsrs.2021.46865.1037","url":null,"abstract":"The present research aims to explain the physico-chemical and mechanical characteristics of alkali activated slag geopolymer binder (AASGB). Commercial sodium hydroxide (SH) and sodium silicate liquid (SSL) are utilized as an alkaline activator at different temperature namely 25C and 65C. The hydration characteristics and physico-mechanical properties are illustrated through the determination of combined water contents Wn), combined slag, total porosity (TP), compressive strength (CS), bulk density (BD) and XRD analysis as spectroscopic tools upto 180 days. The durability of the AASGB against aggressive ions (sulphate and chloride ions ) as well as effect of elevated temperatures upto 1000C are studied. The activated binders are immersed under 5% MgSO4 and/or 5%MgCl2 solutions upto12 months. The data showed that the higher concentration of SH (1mol/kg) at 65C exhibited the highest resistance to elevated temperature upto 1000C as well as given a high resistance against sulphate and chloride attack.","PeriodicalId":16981,"journal":{"name":"Journal of Scientific Research in Science","volume":"7 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82963118","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 : 2021-01-01DOI: 10.21608/jsrs.2021.210680
Rowaa Ghannam, S. Abdelsalam, Afaf Amine, M. A. Hewedy
Hydrocolloid gums are extensively used in food industry. Recently hydrocolloid gums especially Gum Arabic (GA) has been widely used as edible coatings to extent shelf life of postharvest fruits and vegetables. The objective of this study was to evaluate the effect of GA edible film application mixed with glycerol and CaCl2as base matrix with all GA films i.e. GA/EDTA,GA/L. paracasei supernatant and GA/EDTA /L. paracasei supernatant in preservation of potato tubers stored at 8°C and 30±5°C for 35 days. Physicochemical analyses including pH, weight loss percentage and total soluble solids percentage (TSS), as well as microbial analysis (total counts of bacteria, mold and yeast and Enterobacteriaceae).The obtained result revealed that the total microbial count was found that GA/EDTA/ L. paracasei supernatant gave a very close results to petroleum coating (wax) and the best results compared withnoncoated (control) tubers, this was evident through the lower microbial load, better results than other treatments and noncoated tubers such as reducing weight loss, total soluble solids, better control on pH and expansion of the shelf life. Keyword: Potatotubers, Postharvest quality, Edible coating, Gum Arabic, EDTA, L. paracasei, Microbial count.
水胶体胶在食品工业中有着广泛的应用。近年来，水胶体胶，特别是阿拉伯胶(GA)已被广泛应用于可食用涂层，以延长水果和蔬菜的采后保质期。本研究的目的是评价GA食用膜与甘油和CaCl2as基质混合使用GA/EDTA,GA/L所有GA膜的效果。paracasei上清和GA/EDTA /L。马铃薯块茎在8°C和30±5°C条件下保存35天。理化分析包括pH值、失重百分比和总可溶性固形物百分比(TSS)，以及微生物分析(细菌、霉菌、酵母和肠杆菌科的总数)。结果表明，GA/EDTA/ L. paracasei上清液的微生物总数与石油包被(蜡)非常接近，与未包被(对照)的块茎相比效果最好，这可以通过微生物负荷更低，在减轻块茎失重、总可溶性固形物、控制pH和延长保质期方面优于其他处理和未包被的块茎来证明。关键词:马铃薯块茎，采后品质，食用包衣，阿拉伯胶，EDTA，副干酪乳杆菌，微生物计数
{"title":"Application of Gum Arabic as Edible Coating for Improving Postharvest Quality of Potato Tubers","authors":"Rowaa Ghannam, S. Abdelsalam, Afaf Amine, M. A. Hewedy","doi":"10.21608/jsrs.2021.210680","DOIUrl":"https://doi.org/10.21608/jsrs.2021.210680","url":null,"abstract":"Hydrocolloid gums are extensively used in food industry. Recently hydrocolloid gums especially Gum Arabic (GA) has been widely used as edible coatings to extent shelf life of postharvest fruits and vegetables. The objective of this study was to evaluate the effect of GA edible film application mixed with glycerol and CaCl2as base matrix with all GA films i.e. GA/EDTA,GA/L. paracasei supernatant and GA/EDTA /L. paracasei supernatant in preservation of potato tubers stored at 8°C and 30±5°C for 35 days. Physicochemical analyses including pH, weight loss percentage and total soluble solids percentage (TSS), as well as microbial analysis (total counts of bacteria, mold and yeast and Enterobacteriaceae).The obtained result revealed that the total microbial count was found that GA/EDTA/ L. paracasei supernatant gave a very close results to petroleum coating (wax) and the best results compared withnoncoated (control) tubers, this was evident through the lower microbial load, better results than other treatments and noncoated tubers such as reducing weight loss, total soluble solids, better control on pH and expansion of the shelf life. Keyword: Potatotubers, Postharvest quality, Edible coating, Gum Arabic, EDTA, L. paracasei, Microbial count.","PeriodicalId":16981,"journal":{"name":"Journal of Scientific Research in Science","volume":"39 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77702011","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 : 2021-01-01DOI: 10.21608/jsrs.2021.210660
S. Helall, D. Ahmed, Sheren M. Ragei
{"title":"Effect of Pb+2 ion on physico chemical properties of fly ash -slag geopolymer pastes","authors":"S. Helall, D. Ahmed, Sheren M. Ragei","doi":"10.21608/jsrs.2021.210660","DOIUrl":"https://doi.org/10.21608/jsrs.2021.210660","url":null,"abstract":"","PeriodicalId":16981,"journal":{"name":"Journal of Scientific Research in Science","volume":"3 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73159886","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 : 2021-01-01DOI: 10.21608/jsrs.2021.210670
F. Selim, D. Ahmed, E. Kishar
{"title":"Effect of Alkali Concentration on Physico -Chemical and Mechanical Properties of Slag Based Geopolymer Cement.","authors":"F. Selim, D. Ahmed, E. Kishar","doi":"10.21608/jsrs.2021.210670","DOIUrl":"https://doi.org/10.21608/jsrs.2021.210670","url":null,"abstract":"","PeriodicalId":16981,"journal":{"name":"Journal of Scientific Research in Science","volume":"26 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86102236","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 : 2021-01-01DOI: 10.21608/jsrs.2021.210695
H. Mohamed, Amira Abd El-Rhmana, Eman Hassan
Chitosan (COS) is a natural product. It used as a dietary fiber. We explored the impact of chitosan administration in case of nicotine toxicity in adult healthy and corresponding diabetic male rats. Eighty mature male albino rats, weighing 190±10 g, were distributed into two sections healthy and diabetic section. Each section separated into 4 groups each one includes 10 rats, group1: control group, group2: orally administrated, COS, group3: administrated nicotine and group4: administrated both COS and nicotine. The experiment lasted 6 weeks. Diabetes induction with STZ caused significant increase in diabetic biomarker, serum glucose level and HOMA-IR. With a strong decline in insulin, liver glycogen as well as in liver glucokinase enzyme activity. Nicotine worsened the diabetic biomarkers. COS administration caused an ameliorative effect on these diabetic biomarkers that caused by diabetes alone or with nicotine. Diabetes and nicotine caused increase in TAGs, TC, LDL-C, VLDL-C, RF and AI with diminished HDL-C level. COS significantly improved the lipids profile in healthy and diabetic groups. Diabetes induction as well as nicotine injection increased ALT and AST activities and decreased the serum albumin, while COS improved the effects of nicotine and diabetes. Diabetes increased serum creatinine, urea and urine albumin. Also, decreased urine urea and creatinine. Nicotine worsened the kidney function tests in both healthy and diabetic rats. COS improved the renal function. Diabetes and nicotine decreased SOD and increased MDA activities. COS increased SOD and decreased MDA. Diabetes and nicotine increased the DNA fragmentation. COS protected the DNA from damage. Finally, the study demonstrated that COS have antidiabetic, antioxidant and antitoxic effects.
{"title":"Ameliorative Effect of Chitosan on Nicotine Toxicity in Diabetic Rats","authors":"H. Mohamed, Amira Abd El-Rhmana, Eman Hassan","doi":"10.21608/jsrs.2021.210695","DOIUrl":"https://doi.org/10.21608/jsrs.2021.210695","url":null,"abstract":"Chitosan (COS) is a natural product. It used as a dietary fiber. We explored the impact of chitosan administration in case of nicotine toxicity in adult healthy and corresponding diabetic male rats. Eighty mature male albino rats, weighing 190±10 g, were distributed into two sections healthy and diabetic section. Each section separated into 4 groups each one includes 10 rats, group1: control group, group2: orally administrated, COS, group3: administrated nicotine and group4: administrated both COS and nicotine. The experiment lasted 6 weeks. Diabetes induction with STZ caused significant increase in diabetic biomarker, serum glucose level and HOMA-IR. With a strong decline in insulin, liver glycogen as well as in liver glucokinase enzyme activity. Nicotine worsened the diabetic biomarkers. COS administration caused an ameliorative effect on these diabetic biomarkers that caused by diabetes alone or with nicotine. Diabetes and nicotine caused increase in TAGs, TC, LDL-C, VLDL-C, RF and AI with diminished HDL-C level. COS significantly improved the lipids profile in healthy and diabetic groups. Diabetes induction as well as nicotine injection increased ALT and AST activities and decreased the serum albumin, while COS improved the effects of nicotine and diabetes. Diabetes increased serum creatinine, urea and urine albumin. Also, decreased urine urea and creatinine. Nicotine worsened the kidney function tests in both healthy and diabetic rats. COS improved the renal function. Diabetes and nicotine decreased SOD and increased MDA activities. COS increased SOD and decreased MDA. Diabetes and nicotine increased the DNA fragmentation. COS protected the DNA from damage. Finally, the study demonstrated that COS have antidiabetic, antioxidant and antitoxic effects.","PeriodicalId":16981,"journal":{"name":"Journal of Scientific Research in Science","volume":"28 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81131243","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 : 2021-01-01DOI: 10.21608/jsrs.2021.59086.1045
A. Mawad, E. Sarhan, H. H. Abo-Ghalia, Z. Kheiralla
The effect of seed treatment of chickpea (Cicer arietinum L.) with biotic inducers such as Trichoderma viride, Trichoderma harzianum, Pseudomonas fluorescens and Bacillus subtilis in contrast to the fungicide Rizolex-T, were evaluated in the greenhouse and under field conditions during the 2017/2018 season to control the plant disease caused by Fusarium oxysporum, Rhizoctonia solani, or Sclerotinia sclerotiorum, at Giza Agriculture Research Station, Agricultural Research Center, Giza Governorate, Egypt. The tested strains significantly inhibit the mycelial growth of the three tested fungi for pathogenic growth. Compared to the untreated control under greenhouse and field conditions, all the biotic inducer treatments tested significantly decreased the percentages of damping-off, root rot, stem rot and/or wilt diseases. It was noticed that Rizolex-T and (Trichoderma viride + Trichoderma harzianum) have reached the highest percentage of surviving plants followed by (Pseudomonas fluorescens + Bacillus subtilis), Trichoderma viride, Trichoderma harzianum, Bacillus subtilis, Pseudomonas fluorescens and Serratia marcescens, respectively. As well as all the treatments of the checked biocontrol agents increased the growth and yield parameters of chickpea significantly, i.e., plant hight, branches number per plant, pods number per plant, seeds number per plant, seeds weight per plant, 100 seeds weight, and chickpea yield ton/fed. In the presence of the three studied pathogens, defense-related enzyme activities (β-1,3 glucanase, peroxidase, and polyphenoloxidase) have also been determined in all chickpea plants treated with tested biotic inducers compared to untreated infested and non-infested control. The treatment of (Trichoderma harzianum + Trichoderma viride) showed the highest increase in phenol content and the activities of defense-related enzymes.
{"title":"Systemic Resistance in Chickpea (Cicer arietinum L.) Elicited by Some Biotic Inducers Against Root Diseases","authors":"A. Mawad, E. Sarhan, H. H. Abo-Ghalia, Z. Kheiralla","doi":"10.21608/jsrs.2021.59086.1045","DOIUrl":"https://doi.org/10.21608/jsrs.2021.59086.1045","url":null,"abstract":"The effect of seed treatment of chickpea (Cicer arietinum L.) with biotic inducers such as Trichoderma viride, Trichoderma harzianum, Pseudomonas fluorescens and Bacillus subtilis in contrast to the fungicide Rizolex-T, were evaluated in the greenhouse and under field conditions during the 2017/2018 season to control the plant disease caused by Fusarium oxysporum, Rhizoctonia solani, or Sclerotinia sclerotiorum, at Giza Agriculture Research Station, Agricultural Research Center, Giza Governorate, Egypt. The tested strains significantly inhibit the mycelial growth of the three tested fungi for pathogenic growth. Compared to the untreated control under greenhouse and field conditions, all the biotic inducer treatments tested significantly decreased the percentages of damping-off, root rot, stem rot and/or wilt diseases. It was noticed that Rizolex-T and (Trichoderma viride + Trichoderma harzianum) have reached the highest percentage of surviving plants followed by (Pseudomonas fluorescens + Bacillus subtilis), Trichoderma viride, Trichoderma harzianum, Bacillus subtilis, Pseudomonas fluorescens and Serratia marcescens, respectively. As well as all the treatments of the checked biocontrol agents increased the growth and yield parameters of chickpea significantly, i.e., plant hight, branches number per plant, pods number per plant, seeds number per plant, seeds weight per plant, 100 seeds weight, and chickpea yield ton/fed. In the presence of the three studied pathogens, defense-related enzyme activities (β-1,3 glucanase, peroxidase, and polyphenoloxidase) have also been determined in all chickpea plants treated with tested biotic inducers compared to untreated infested and non-infested control. The treatment of (Trichoderma harzianum + Trichoderma viride) showed the highest increase in phenol content and the activities of defense-related enzymes.","PeriodicalId":16981,"journal":{"name":"Journal of Scientific Research in Science","volume":"27 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84081409","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 : 2021-01-01DOI: 10.21608/jsrs.2021.210657
M. Mohamed, S. T. Bishay, M. Boshta
A chemical spray pyrolysis technique was used to deposit a vanadium pentoxide (V2O5) thin films on glass substrate with a deposition temperature ranged from 300°C to 500°C in step of 50°C. From ammonium meta vanadate aqua precursor solution molarity of (0.1 M) was used as a source of vanadium. The effect of deposition temperature on structure, morphological, electrical conductivity and optical properties wasanalyzedat constant preparation time, solution molarity and the distance between spray nozzle and substrate.X-ray diffraction patterns shown that an orthorhombic cubic structure withgrowth along (001) plane. With increasing the substrate temperature, the electrical conductivity was increased, and the scanning electron microscopy clarified that the crystallinity of V2O5 thin films was effectively modified. The optical results revealed that energy band gap of V2O5 films deposited at 400 C, 450C and 500C is 2.38 eV for direct allowed transition. Based on the observed results the V2O5 phase can be well controlled by altering the substrate temperature. All prepared thin films up to 400C show transparency in both visible and near IR region.
{"title":"Preparation and Characterization of Vanadium Pentoxide Using Spray Pyrolysis Technique","authors":"M. Mohamed, S. T. Bishay, M. Boshta","doi":"10.21608/jsrs.2021.210657","DOIUrl":"https://doi.org/10.21608/jsrs.2021.210657","url":null,"abstract":"A chemical spray pyrolysis technique was used to deposit a vanadium pentoxide (V2O5) thin films on glass substrate with a deposition temperature ranged from 300°C to 500°C in step of 50°C. From ammonium meta vanadate aqua precursor solution molarity of (0.1 M) was used as a source of vanadium. The effect of deposition temperature on structure, morphological, electrical conductivity and optical properties wasanalyzedat constant preparation time, solution molarity and the distance between spray nozzle and substrate.X-ray diffraction patterns shown that an orthorhombic cubic structure withgrowth along (001) plane. With increasing the substrate temperature, the electrical conductivity was increased, and the scanning electron microscopy clarified that the crystallinity of V2O5 thin films was effectively modified. The optical results revealed that energy band gap of V2O5 films deposited at 400 C, 450C and 500C is 2.38 eV for direct allowed transition. Based on the observed results the V2O5 phase can be well controlled by altering the substrate temperature. All prepared thin films up to 400C show transparency in both visible and near IR region.","PeriodicalId":16981,"journal":{"name":"Journal of Scientific Research in Science","volume":"3 3 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78091051","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 : 2021-01-01DOI: 10.21608/jsrs.2021.85083.1060
Shimaa S Khaled, Howaida Zaky, Abeer Salah Nasr, N. Hassan
In the present work, sulfonamide chitosan derivatives were prepared via the reaction of chitosan (Cs) with diphenyl ether – 4, 4`disulfonylchloride (DPE) in absence and/or presence of glutaraldehyde (G) to form the hydrogel (DPE-I) and (DPE-II) respectively. The nanogels (DPE-III) and (DPE-IV) were prepared via ionotropic gelation method in presence of sodium tri polyphosphate (TPP) under the same reaction conditions. The hydrogels (DPE-I, DPE-II, DPE-III, and DPEIV) were characterized by different tools as: Elemental analysis, Fourier Transform InfraRed spectrometer (FT-IR), Proton Nuclear Magnetic Resonance (HNMR), Scanning Electron Microscopy (SEM), and Transmission Electron Microscopy (TEM). The adsorption efficiency of the prepared hydrogels for removal of congo red dye (CR) from aqueous solution under different parameters such as (time, pH, and concentration) was evaluated. The adsorption capacity of CR by the prepared hydrogels increased with time, adsorbent dosage and the initial concentration of CR. The optimum adsorption capacity for CR dye by the prepared hydrogels was at pH 7. Hydrogels (DPE-III and DPE-IV) showed the highest efficiency for adsorption of (CR) dye.
{"title":"Modified Chitosan Hydrogels and Nano Hydrogels for Congo Red Removal from Aqueous System","authors":"Shimaa S Khaled, Howaida Zaky, Abeer Salah Nasr, N. Hassan","doi":"10.21608/jsrs.2021.85083.1060","DOIUrl":"https://doi.org/10.21608/jsrs.2021.85083.1060","url":null,"abstract":"In the present work, sulfonamide chitosan derivatives were prepared via the reaction of chitosan (Cs) with diphenyl ether – 4, 4`disulfonylchloride (DPE) in absence and/or presence of glutaraldehyde (G) to form the hydrogel (DPE-I) and (DPE-II) respectively. The nanogels (DPE-III) and (DPE-IV) were prepared via ionotropic gelation method in presence of sodium tri polyphosphate (TPP) under the same reaction conditions. The hydrogels (DPE-I, DPE-II, DPE-III, and DPEIV) were characterized by different tools as: Elemental analysis, Fourier Transform InfraRed spectrometer (FT-IR), Proton Nuclear Magnetic Resonance (HNMR), Scanning Electron Microscopy (SEM), and Transmission Electron Microscopy (TEM). The adsorption efficiency of the prepared hydrogels for removal of congo red dye (CR) from aqueous solution under different parameters such as (time, pH, and concentration) was evaluated. The adsorption capacity of CR by the prepared hydrogels increased with time, adsorbent dosage and the initial concentration of CR. The optimum adsorption capacity for CR dye by the prepared hydrogels was at pH 7. Hydrogels (DPE-III and DPE-IV) showed the highest efficiency for adsorption of (CR) dye.","PeriodicalId":16981,"journal":{"name":"Journal of Scientific Research in Science","volume":"14 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78126232","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 : 2021-01-01DOI: 10.21608/jsrs.2021.210684
Fatma elmorsi, W.S. Abou El– Kheir, SH. Abd-Elqader, A. Helal, K. Farroh
Nowadays, we need to develop eco-friendly nanoparticles synthesis process that does not use toxic chemicals in the synthesis methods. Biological synthesis of nanomaterials is cheaper, innovative and environmental friendly. From this point, the present study focused on the synthesis of silver nanoparticles from the extracts of Ulva lactuca, Sargassum denticulatum, Spirulina platensis and Chlorella vulgaris. Characterizations were performed by UV-Visible Spectroscopy (UV-Vis), X-ray Diffraction (XRD) and particle morphology, and size of silver nanoparticles were observed by transmission electron microscope (TEM) It was found spherical shaped nanoparticles sizes with average diameter of approximately 20,78.8, 31 and 50 nm from the extracts of the four algal species (Ulva lactuca, Sargassum denticulatum, Chlorella vulgaris and Spirulina platensis), respectively. So, the extracts from algae were screened for phytochemicals analysis followed by FT-IR to know the present chemical functional groups. Therefore, the present study illustrates silver nanoparticles can play an influential role in nanobiotechnology field in future.
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