Journal of Modern Research in English Language Studies最新文献_第3页

Could Allicin Inhalation Bring Covid-19 Pandemic Under Control: New delivery of ancient medicine garlic 吸入大蒜素能控制Covid-19大流行:中药大蒜的新交付

Journal of Modern Research in English Language Studies Pub Date : 2021-01-01 DOI: 10.21608/jmr.2021.74678.1065

S. Abozaid

引用次数: 0

EFFECT OF CHEMICAL AGING ON THE COLOR STABILITY OF TWO CERAMIC MATERIALS; ZIRCONIA REINFORCED LITHIUM SILICATE AND LITHIUM DISILICATS CERAMICS 化学老化对两种陶瓷材料颜色稳定性的影响氧化锆增强硅酸锂和二硅酸锂陶瓷

Journal of Modern Research in English Language Studies Pub Date : 2020-12-24 DOI: 10.21608/jmr.2020.34571.1027

Mohamed S. Mohamed

{"title":"EFFECT OF CHEMICAL AGING ON THE COLOR STABILITY OF TWO CERAMIC MATERIALS; ZIRCONIA REINFORCED LITHIUM SILICATE AND LITHIUM DISILICATS CERAMICS","authors":"Mohamed S. Mohamed","doi":"10.21608/jmr.2020.34571.1027","DOIUrl":"https://doi.org/10.21608/jmr.2020.34571.1027","url":null,"abstract":"Objectives: The presence of fine-grained crystals of lithium silicate, which contains a high amount of glass provides the material it’s optical and mechanical characteristics. This unique microstructure allows this material to be processed in a dental lab quickly and efficiently in its crystalline state and the exact tooth shade. This study aims to evaluate the color stability of zirconia reinforced lithium silicate ceramic and lithium disilicates ceramic restorations. Materials and Methods: In this in vitro study, 40 discs of 2mm thickness and 10mm in diameter would be fabricated, all samples were divided into two groups (n=20) according to ceramic material used: group Z zirconia reinforced lithium silicates ceramic(ZLS) and group L lithium disilicate ceramic(LS) discs. Each group was subdivided into two subgroups according to the aging process (n=10) (before and after aging). CIELAB color parameters of all samples were calculated from spectral reflectance measurements on a spectrophotometer to evaluate the effect of chemical aging on the color stability. Statistical Analysis: One-way ANOVA analysis was used to compare measurements among groups. Results: ZLS showed lower color stability than LS, and there was a statistical difference between them. Aging affected the color stability of the two ceramics but within an acceptable range with lithium disilicates. Conclusion: ZLS gave lower color stability than LS and aging affected the color stability of both types of ceramic. The postulated hypothecs of this study were ZLS will be higher color stability than LS and chemical aging will have a huge effect. Article information Received: 9 July 2020 Revised: 12 August 2020 Accepted: 12 August 2020","PeriodicalId":33372,"journal":{"name":"Journal of Modern Research in English Language Studies","volume":"106 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87821650","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

The possible protective effect of captopril on liver and bone marrow after cyclophosphamide-induced toxicity in adult albino rats 卡托普利对成年白化大鼠环磷酰胺中毒后肝脏和骨髓可能的保护作用

Journal of Modern Research in English Language Studies Pub Date : 2020-12-24 DOI: 10.21608/jmr.2020.34439.1029

S. Abozaid, A. Abobakr, abil Hasssan, Merry Malak

{"title":"The possible protective effect of captopril on liver and bone marrow after cyclophosphamide-induced toxicity in adult albino rats","authors":"S. Abozaid, A. Abobakr, abil Hasssan, Merry Malak","doi":"10.21608/jmr.2020.34439.1029","DOIUrl":"https://doi.org/10.21608/jmr.2020.34439.1029","url":null,"abstract":"Cyclophosphamide (CP) is commonly used in regimen of treatment of cancers and autoimmune diseases as systemic lupus. Hepatotoxicity and bone marrow depression are acute side effects of CP through inducing oxidative stress. The concomitant use of captopril ameliorates these side effects. This study aimed to evaluate the possible protective effects of captopril against hepatotoxicity and bone marrow depression induced by CP in adult albino rats. In this experimental study, 60 rats were divided into 4 groups; the control group, the captopril treated group, CP treated group and the captopril-CP treated group. The liver tissues and bone marrow of rats in all groups were subjected to light and electron microscopic studies. The serum levels of liver function markers were assessed. The results showed that the injection of CP elevate serum ALT and AST compared to the control group. Concomitant treatment of captopril and CP decreases serum levels of ALT and AST. CP treated group showed diffuse lesion of liver tissue and bone marrow. The captopril-CP treated group showed minimal hepatic congestion and decreased adipose tissue in bone marrow. The current study suggested that captopril has protective effect against cyclophosphamide induced hepatotoxicity and myelotoxicity. Article information Received: 3 July 2020 Revised: 23 August 2020 Accepted: 23 August 2020","PeriodicalId":33372,"journal":{"name":"Journal of Modern Research in English Language Studies","volume":"55 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76579527","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

Characteristics and Functional Properties of collagen extracted from Nile tilapia (Oreochromis niloticus) skin 尼罗罗非鱼(Oreochromis niloticus)皮肤胶原蛋白的特性及功能特性

Journal of Modern Research in English Language Studies Pub Date : 2020-12-20 DOI: 10.21608/jmr.2020.37541.1034

H. Abdelaal, H. Mohamed, Sanaa H. Saleh, reem koriem

{"title":"Characteristics and Functional Properties of collagen extracted from Nile tilapia (Oreochromis niloticus) skin","authors":"H. Abdelaal, H. Mohamed, Sanaa H. Saleh, reem koriem","doi":"10.21608/jmr.2020.37541.1034","DOIUrl":"https://doi.org/10.21608/jmr.2020.37541.1034","url":null,"abstract":"Tilapia skin might be used as a new source of collagen, therefore collagen obtained from Nile tilapia skin can be utilized as food product because of its good functional properties. Two extraction methods were applied to obtain acidsoluble collagen (ASC) and pepsin-soluble collagen (PSC) from Nile tilapia skin. In this study, collagen was characterized in terms of FT-IR Spectrum, amino acid analysis, SDS-PAGE and Thermal denaturation temperatures (Td). Also, some major functional properties including solubility, oil and water absorption, emulsifying activity, stability, foaming ability, foam stability, and gelation properties were determined. The results showed that the yields of ASC and PSC were 4.30% and 1.84 % (on a wet weight basis), respectively. Amino acid composition indicated that the imino acid content of ASC and PSC were found to be 172.10 and 164.18 residues per 1000 residues, respectively. The FTIR Spectrum confirmed that the presence of a triple-helical structure characteristic of ASC and PSC. SDS-PAGE results indicated that ASC and PSC were type I collagen. The denaturation temperature of ASC and PSC were 260 C and 250 C respectively. The solubility of ASC and PSC were highly solubilized in the pH range of 2–3. ASC and PSC had good water and oil absorption capacity. Gelation studies revealed that ASC and PSC have good gelation properties. Consequently, Nile tilapia skin could be used as a good source of collagen in the food industries. Article information Received: 5 September 2020 Revised: 8 November 2020 Accepted: 12 December 2020","PeriodicalId":33372,"journal":{"name":"Journal of Modern Research in English Language Studies","volume":"27 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87315678","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 Aging and Pre-sintering Surface Treatment of Zirconia Cores on Chipping of Veneered Zirconia Crowns 老化和预烧结表面处理对贴面氧化锆冠剥落的影响

Journal of Modern Research in English Language Studies Pub Date : 2019-11-06 DOI: 10.21608/jmr.2019.18412.1010

Hanaa Mahmoud, Yaser Gomaa, A. Habib

{"title":"Effect of Aging and Pre-sintering Surface Treatment of Zirconia Cores on Chipping of Veneered Zirconia Crowns","authors":"Hanaa Mahmoud, Yaser Gomaa, A. Habib","doi":"10.21608/jmr.2019.18412.1010","DOIUrl":"https://doi.org/10.21608/jmr.2019.18412.1010","url":null,"abstract":"Abstract Aim: This study was conducted to study the effect of surface treatment of zirconia cores by nanosilica before sintering on veneers chipping and to evaluate the effect of aging in terms of thermocycling and cyclic loading on veneer chipping before and after surface treatment. Method: Model acrylic tooth was prepared for zirconia crown, twenty silicon impressions were recorded and epoxy resin dies were produced. Twenty zirconia cores were fabricated by CAD/ CAM system and divided into 2 groups (n=10) group I was the control which veneered with porcelain by hand layering technique while group II was subjected to treatment by nanosilica slurry before sintering then veneered and fired to produce crowns. The crowns were cemented by resin cement on their epoxy dies and they were subjected to 10000 thermocycles and 10000 cyclic loads. All crowns were loaded till chipping of veneer layer then the chipped surfaces were examined by SEM/EDX. Results: There was no significant difference in chipping resistance between group I and group II. Conclusions: Treatment of zirconia cores by nanosilica before sintering has no effect on chipping resistance of the veneer layer after subjecting to aging process (thermocycling and cyclic loading).","PeriodicalId":33372,"journal":{"name":"Journal of Modern Research in English Language Studies","volume":"21 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78276151","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

INFLUENCE OF FILLING MEDIUM DENSITY POLYETHYLENE WITH VEGETABLE OILS ON FRICTION AND WEAR 植物油填充中密度聚乙烯对摩擦磨损的影响

Journal of Modern Research in English Language Studies Pub Date : 2019-10-23 DOI: 10.21608/jmr.2019.14889.1004

K. Mahmoud, M. Khashaba

引用次数: 1

On Generalized Linear Exponential Distribution: Different Methods of Estimation 广义线性指数分布:不同的估计方法

Journal of Modern Research in English Language Studies Pub Date : 2019-10-07 DOI: 10.21608/jmr.2019.15428.1007

M. Mahmoud, M. Ghazal, H. M. M. Radwan

{"title":"On Generalized Linear Exponential Distribution: Different Methods of Estimation","authors":"M. Mahmoud, M. Ghazal, H. M. M. Radwan","doi":"10.21608/jmr.2019.15428.1007","DOIUrl":"https://doi.org/10.21608/jmr.2019.15428.1007","url":null,"abstract":"This paper concerns with various techniques for estimations from the generalized linear exponential distribution (GLED) that can be used for modeling bathtub, increasing and decreasing hazard rate (HR) behavior and was first proposed by [3]. This distribution is important since it contains as special sub-models some widely well-known distributions such as the exponential distribution (ED), the Rayleigh distribution (RD), the linear exponential distribution (LED), and the Weibull distribution (WD). The various techniques for estimations can be considered as maximum likelihood estimation (MLE), least-square estimation (LSE), weighted least square estimation (WLSE), Cramer Von-Mises estimation (CVME), and Anderson Darling estimation (ADE). These methods of estimations are used to estimate the unknown parameters of the well-known GLED. Two applications are used to show that the GLED is a viable distribution in modeling lifetime data and to compare the varying methods of estimations based on the Kolmogorov-Simnorov test with the corresponding P-value to show the optimal method. Finally, a simulation study is presented to compare the varying methods of estimation based on the mean square error (MSE) and the average absolute bias (AAB).","PeriodicalId":33372,"journal":{"name":"Journal of Modern Research in English Language Studies","volume":"38 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85270396","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

Hydrolytic enzyme production of endophytic fungi isolated from soybean (Glycine max) 大豆内生真菌(Glycine max)水解酶产量的研究

Journal of Modern Research in English Language Studies Pub Date : 2019-09-15 DOI: 10.21608/jmr.2019.15748.1008

Hala Montaser Farouk, E. Attia, Mo'men H. El-Katatny

引用次数: 9

STUDYING THE INFLUENCE OF DIFFERENT COOLING TECHNIQUES ON PHOTOVOLTAIC-CELLS PERFORMANCE 研究不同冷却技术对光伏电池性能的影响

Journal of Modern Research in English Language Studies Pub Date : 2019-07-01 DOI: 10.21608/JMR.2019.12713.1002

Ahmed H. Ali, Khalid H. M. Abdalrahman, S. S. Wahid

{"title":"STUDYING THE INFLUENCE OF DIFFERENT COOLING TECHNIQUES ON PHOTOVOLTAIC-CELLS PERFORMANCE","authors":"Ahmed H. Ali, Khalid H. M. Abdalrahman, S. S. Wahid","doi":"10.21608/JMR.2019.12713.1002","DOIUrl":"https://doi.org/10.21608/JMR.2019.12713.1002","url":null,"abstract":"The effect of temperature on the electrical parameters of photovoltaic cells is negative. The efficiency of photovoltaic cells can be enhanced by cooling which the temperature is considered as one of the main factors that affect negatively on the output power. This study was carried out to compare between three different cooling techniques and determine their effects on the output power. The first, cooling techniques is applied, the panel front surface cooled using the water spray on the surface. The second, the panel back surface cooled by extended fins. The third, the panel back surface cooled by extended fins with fans. As expected, the results of comparisons different methods using in cell cooling showed that, there is an increase in the efficiency of photovoltaic cells with the drop in cell temperature, which helps to increase the rate of photovoltaic cell performance and output power. In these experiments the output power increased 2.5%. At the first technique using water spray method the temperature dropped 7 degrees. At the other two methods the temperature dropped 3 degrees less than the panel without cooling. The used pump and fans were power consuming. So, the most effective method was cooling using the fins.","PeriodicalId":33372,"journal":{"name":"Journal of Modern Research in English Language Studies","volume":"45 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76331059","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

Incorporating nano graphene oxide to poly-methyl methacrylate; antibacterial effect and thermal expansion. 纳米氧化石墨烯加入聚甲基丙烯酸甲酯抗菌效果和热膨胀。

Journal of Modern Research in English Language Studies Pub Date : 2019-07-01 DOI: 10.21608/JMR.2019.14281.1003

R. Gamal, Y. Gomaa, A. M. Said

{"title":"Incorporating nano graphene oxide to poly-methyl methacrylate; antibacterial effect and thermal expansion.","authors":"R. Gamal, Y. Gomaa, A. M. Said","doi":"10.21608/JMR.2019.14281.1003","DOIUrl":"https://doi.org/10.21608/JMR.2019.14281.1003","url":null,"abstract":"Aim: This in vitro study was performed to evaluate antibacterial effect and thermal expansion of commercial available poly-methyl methacrylate (PMMA) incorporated by nano graphene oxide (GO) in different concentration. Method: Nano graphene oxide in five concentrations 0%, 0.05%, 0.1%, 0.15% and 1% by weight was incorporated to PMMA to form groups I-V respectively. To evaluate the antibacterial effect against Streptococcus Mutans, minimal inhibitory concentration (MIC) for GO dispersion was done and agar well diffusion test for groups I-IV was done. Thermal expansion was assessed through measuring the linear coefficient of thermal expansion. Results: For antibacterial effect, all concentrations tested for MIC showed inhibition zone varied from 0.5 to 2mm in diameter. All tested groups evaluated by agar well diffusion method showed no inhibition zones except for group II. Significant reduction in coefficient of thermal expansion was showed by increasing GO concentration. Conclusions: Incorporation of GO in to PMMA at concentration of 0.5% can inhibit the growth of Streptococcus Mutans. There is an inverse relation between the concentrations of GO and the coefficient of thermal expansion.","PeriodicalId":33372,"journal":{"name":"Journal of Modern Research in English Language Studies","volume":"212 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79414031","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: 9