Journal of Scientific Research in Science最新文献_第7页

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 1'，3'-二氢-1'，3'，3'-三甲基-6-硝基螺[2H-1苯并吡喃-2,2'[2H]吲哚]化合物的结构、电导率和介电性能表征

Journal of Scientific Research in Science Pub Date : 2021-01-01 DOI: 10.21608/jsrs.2021.210654

E. Elgarhy, M. El-Nahass, H. A. Zayed, .. A. Ali

{"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":null,"pages":null},"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}

引用次数: 1

Effect of sulphate, chloride and elevated temperature on the properties of Egyptian slag binder 硫酸盐、氯化物和高温对埃及渣粘结剂性能的影响

Journal of Scientific Research in Science Pub Date : 2021-01-01 DOI: 10.21608/jsrs.2021.46865.1037

basma ibrahime, E. Kishar, Mohamed Heikal, S. Awad

引用次数: 1

Application of Gum Arabic as Edible Coating for Improving Postharvest Quality of Potato Tubers 阿拉伯胶可食性包衣在改善马铃薯块茎采后品质中的应用

Journal of Scientific Research in Science Pub Date : 2021-01-01 DOI: 10.21608/jsrs.2021.210680

Rowaa Ghannam, S. Abdelsalam, Afaf Amine, M. A. Hewedy

{"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":null,"pages":null},"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}

引用次数: 2

Effect of Pb+2 ion on physico chemical properties of fly ash -slag geopolymer pastes Pb+2离子对粉煤灰-矿渣地聚合物膏体理化性能的影响

Journal of Scientific Research in Science Pub Date : 2021-01-01 DOI: 10.21608/jsrs.2021.210660

S. Helall, D. Ahmed, Sheren M. Ragei

引用次数: 2

Effect of Alkali Concentration on Physico -Chemical and Mechanical Properties of Slag Based Geopolymer Cement. 碱浓度对矿渣基地聚合物水泥理化和力学性能的影响。

Journal of Scientific Research in Science Pub Date : 2021-01-01 DOI: 10.21608/jsrs.2021.210670

F. Selim, D. Ahmed, E. Kishar

引用次数: 4

Ameliorative Effect of Chitosan on Nicotine Toxicity in Diabetic Rats 壳聚糖对糖尿病大鼠尼古丁毒性的改善作用

Journal of Scientific Research in Science Pub Date : 2021-01-01 DOI: 10.21608/jsrs.2021.210695

H. Mohamed, Amira Abd El-Rhmana, Eman Hassan

{"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":null,"pages":null},"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}

引用次数: 2

Systemic Resistance in Chickpea (Cicer arietinum L.) Elicited by Some Biotic Inducers Against Root Diseases 鹰嘴豆(Cicer arietinum L.)的系统性抗性一些生物诱导剂对根病的诱导作用

Journal of Scientific Research in Science Pub Date : 2021-01-01 DOI: 10.21608/jsrs.2021.59086.1045

A. Mawad, E. Sarhan, H. H. Abo-Ghalia, Z. Kheiralla

{"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":null,"pages":null},"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}

引用次数: 0

Preparation and Characterization of Vanadium Pentoxide Using Spray Pyrolysis Technique 喷雾热解法制备五氧化二钒及其表征

Journal of Scientific Research in Science Pub Date : 2021-01-01 DOI: 10.21608/jsrs.2021.210657

M. Mohamed, S. T. Bishay, M. Boshta

{"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":null,"pages":null},"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}

引用次数: 0

Modified Chitosan Hydrogels and Nano Hydrogels for Congo Red Removal from Aqueous System 改性壳聚糖水凝胶和纳米水凝胶去除刚果红的研究

Journal of Scientific Research in Science Pub Date : 2021-01-01 DOI: 10.21608/jsrs.2021.85083.1060

Shimaa S Khaled, Howaida Zaky, Abeer Salah Nasr, N. Hassan

{"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":null,"pages":null},"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}

引用次数: 0

Synthesis of silver nanoparticles using Ulva lactuca, Sargassum denticulatum, Spirulina platensis and Chlorella vulgaris 乳藻、齿藻、螺旋藻和小球藻合成纳米银的研究

Journal of Scientific Research in Science Pub Date : 2021-01-01 DOI: 10.21608/jsrs.2021.210684

Fatma elmorsi, W.S. Abou El– Kheir, SH. Abd-Elqader, A. Helal, K. Farroh

{"title":"Synthesis of silver nanoparticles using Ulva lactuca, Sargassum denticulatum, Spirulina platensis and Chlorella vulgaris","authors":"Fatma elmorsi, W.S. Abou El– Kheir, SH. Abd-Elqader, A. Helal, K. Farroh","doi":"10.21608/jsrs.2021.210684","DOIUrl":"https://doi.org/10.21608/jsrs.2021.210684","url":null,"abstract":"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.","PeriodicalId":16981,"journal":{"name":"Journal of Scientific Research in Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84701512","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: 1