Pub Date : 2020-09-01DOI: 10.33899/edusj.2019.125959.1009
mohamed thamer aghwan, Elham Sadullah Al-talibi
An indirect sensitive and selective spectrophotometric method has been developed for the determination of cephalexin monohydrate (CEM) ceftriaxone sodium (CFX) and cefotaxim sodium (CEF) in bulk and pharmaceutical formulation. The method is based on the oxidation of (CEM), (CFX) and (CEF) in hydrochloric acid medium with known excess on N-Bromosuccinimde and subsequent determination of unreacted oxidant by decolorization of Evans blue dye (EB) and measure the absorbance of residual dye at 608 nm. Calibration curves of evans blue dye in the presence of drugs were rectilinear over the ranges 1.0-9.0 , 1.0-8.0 and 1.09.0 μg/ml with molar absorptivity 2.75×10 , 9.28×10 and 7.81×10 l.mol.cm and average recoveries 98.97, 102.08 and 100.08% for CEM, CFX and CEF respectively with RSD of less than 3.29%. The method was free from interference of many excipients and additives commonly found in pharmaceutical formulations. The developed method was successfully applied for determination of the studied drugs in their pharmaceutical formulation resulted in a good agreement with certified value and standard addition procedure.
{"title":"Indirect Spectrophotometric Determination of Cefalexin monohydrate, Ceftriaxone Sodium and Cefotaxim Sodium in Pharmaceuticals Using N-Bromosuccinimde and Evans Blue Dye","authors":"mohamed thamer aghwan, Elham Sadullah Al-talibi","doi":"10.33899/edusj.2019.125959.1009","DOIUrl":"https://doi.org/10.33899/edusj.2019.125959.1009","url":null,"abstract":"An indirect sensitive and selective spectrophotometric method has been developed for the determination of cephalexin monohydrate (CEM) ceftriaxone sodium (CFX) and cefotaxim sodium (CEF) in bulk and pharmaceutical formulation. The method is based on the oxidation of (CEM), (CFX) and (CEF) in hydrochloric acid medium with known excess on N-Bromosuccinimde and subsequent determination of unreacted oxidant by decolorization of Evans blue dye (EB) and measure the absorbance of residual dye at 608 nm. Calibration curves of evans blue dye in the presence of drugs were rectilinear over the ranges 1.0-9.0 , 1.0-8.0 and 1.09.0 μg/ml with molar absorptivity 2.75×10 , 9.28×10 and 7.81×10 l.mol.cm and average recoveries 98.97, 102.08 and 100.08% for CEM, CFX and CEF respectively with RSD of less than 3.29%. The method was free from interference of many excipients and additives commonly found in pharmaceutical formulations. The developed method was successfully applied for determination of the studied drugs in their pharmaceutical formulation resulted in a good agreement with certified value and standard addition procedure.","PeriodicalId":15610,"journal":{"name":"Journal of Education Science","volume":"71 1","pages":"11-31"},"PeriodicalIF":0.0,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84140172","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 : 2020-08-31DOI: 10.33899/EDUSJ.2020.127055.1067
M. Hussien, R. Noori
The drift-diffusion model is considered as one of the most important models which is used to describe the characteristics of semiconductor devices and can be applied to wide range of applications started from micro up to nano scale devices after applying the suitable correction on it. The Poisson, continuity, and current equations are considered as the basic equations for semiconductor devices, these equations are partial differential equations, used in the drift diffusion model. These equations described the semiclassical electron and hole transport in semiconductor in the presence of uniformly applied electric field. In this paper a numerical method (finite difference method) has been used to find the solution of these equations depending on Gummel method and Scharfetter-Gummel scheme, the drift diffusion model is applied after many approximation and suitable boundary condition which has been considered for the pn diode in both equilibrium and non-equilibrium cases at room temperature, from this simulation model a MATLAB program has been prepared to obtained diode parameters as a function of distance at the junction region, these parameters are (conduction band, carrier concentration, electric field and charge density) two diode model has been tested with different doping concentration the first with NA = ND and the second with NA > ND also the diode characteristic in the forward biased is obtained. Keyword: simulation of pn diode, drift diffusion model, Gummel method. فا رجنلاا جذومنل يددعلا لحلا ءاصقتسا يئانث يف راشتنلاا pn ذ ي نوكيلسلا يف دحاو دعب را رقتسلاا ةلاح تباث يرون انا زور 1 و نيسح حلاص دمحم زاتمم * 2 1 , 2 ءايزيفلا مسق , ةفرصلا مولعلل ةيبرتلا ةيلك , لصوملا ةعماج قا رعلا ,لصوملا , صخلملا دعي فا رجنا جذومن راشتنا كميو تلاصوملا هابشا طئابن صئاصخ فصول ةمدختسملا جذامنلا مها نم ن نم عساو ىدم ىلع هقيبطت تاقيبطتلا داعبلاا ىلا )ةيوركياملا( ةقيقدلا داعبلاا نم دتمت .اهل ةبسانملا تاحيحصتلا لاخدا دعب ةيونانلا نوساوب ةلداعم ربتعت ، جذومن يف مدختست ةيئزج ةيلضافت تلاداعم يهو تلاصوملا هابشا يف ةيساسلاا تلاداعملا نم رايتلا ةلداعمو ةيرا رمتسلاا ةلداعمو فا رجنلاا هذه فصت .راشتنلاا يجراخ يئابرهك لاجم دوجو لاح يف تاوجفلاو تانورتكللإل يكيسلاكلا ةبش لاقتنلاا تلاداعملا نم .مظت لموك ةقيرط ىلع دامتعلااب تلاداعملا هذهل لولح داجيلإ )ةدودحملا قورفلا ةقيرط( ةيددع ةقيرط قيبطت ثحبلا اذه يف مت Journal of Education and Science (ISSN 1812-125X), Vol: 30, No: 1, 2021 (46-57) Downloaded from https://edusj.mosuljournals.com/ 47 رتفريش ططخمو .لموك فا رجنلاا جذومن قيبطت مت – اشتنلاا ر ، ةبسانم ةيدودح طورش مادختسابو لحلل تابيرقت ةدع ءا رجا دعب يئانث ىلع pn وتلا ةلاح يف اوتلا مدعو نزا .ةفرغلا ةرا رح ةجرد دنع نز ح جمانرب دادعإب ةاكاحم ءا رجا مت ا س و ةغلب يب MATLAB نوكيلسلا يئانثل تاملعم ىلع لوصحلاو pn نم لك ىلع لوصحلا مت ذا .ةفاسملل ةلادك ليصوتلا ةمزح ، تلاماحلا زيكرت ، لاجملا لا ةلاح يف ةفاسملل ةلادك ةنحشلا ةفاثكو يئابرهكلا امدنع يا نزاوت NA = ND امدنع يا نزاوتلا مدع ةلاح يفو NA > ND .نيتلاحلا نيب ةنراقملا تمتو :ةلادلا تاملكلا يئانث ةاكاحم pn نا جذومن ، فارج نا .لموك ةقيرط
{"title":"Investigation of The Numerical Solution for One Dimensional Drift-Diffusion Model in Silicon in Steady State","authors":"M. Hussien, R. Noori","doi":"10.33899/EDUSJ.2020.127055.1067","DOIUrl":"https://doi.org/10.33899/EDUSJ.2020.127055.1067","url":null,"abstract":"The drift-diffusion model is considered as one of the most important models which is used to describe the characteristics of semiconductor devices and can be applied to wide range of applications started from micro up to nano scale devices after applying the suitable correction on it. The Poisson, continuity, and current equations are considered as the basic equations for semiconductor devices, these equations are partial differential equations, used in the drift diffusion model. These equations described the semiclassical electron and hole transport in semiconductor in the presence of uniformly applied electric field. In this paper a numerical method (finite difference method) has been used to find the solution of these equations depending on Gummel method and Scharfetter-Gummel scheme, the drift diffusion model is applied after many approximation and suitable boundary condition which has been considered for the pn diode in both equilibrium and non-equilibrium cases at room temperature, from this simulation model a MATLAB program has been prepared to obtained diode parameters as a function of distance at the junction region, these parameters are (conduction band, carrier concentration, electric field and charge density) two diode model has been tested with different doping concentration the first with NA = ND and the second with NA > ND also the diode characteristic in the forward biased is obtained. Keyword: simulation of pn diode, drift diffusion model, Gummel method. فا رجنلاا جذومنل يددعلا لحلا ءاصقتسا يئانث يف راشتنلاا pn ذ ي نوكيلسلا يف دحاو دعب را رقتسلاا ةلاح تباث يرون انا زور 1 و نيسح حلاص دمحم زاتمم * 2 1 , 2 ءايزيفلا مسق , ةفرصلا مولعلل ةيبرتلا ةيلك , لصوملا ةعماج قا رعلا ,لصوملا , صخلملا دعي فا رجنا جذومن راشتنا كميو تلاصوملا هابشا طئابن صئاصخ فصول ةمدختسملا جذامنلا مها نم ن نم عساو ىدم ىلع هقيبطت تاقيبطتلا داعبلاا ىلا )ةيوركياملا( ةقيقدلا داعبلاا نم دتمت .اهل ةبسانملا تاحيحصتلا لاخدا دعب ةيونانلا نوساوب ةلداعم ربتعت ، جذومن يف مدختست ةيئزج ةيلضافت تلاداعم يهو تلاصوملا هابشا يف ةيساسلاا تلاداعملا نم رايتلا ةلداعمو ةيرا رمتسلاا ةلداعمو فا رجنلاا هذه فصت .راشتنلاا يجراخ يئابرهك لاجم دوجو لاح يف تاوجفلاو تانورتكللإل يكيسلاكلا ةبش لاقتنلاا تلاداعملا نم .مظت لموك ةقيرط ىلع دامتعلااب تلاداعملا هذهل لولح داجيلإ )ةدودحملا قورفلا ةقيرط( ةيددع ةقيرط قيبطت ثحبلا اذه يف مت Journal of Education and Science (ISSN 1812-125X), Vol: 30, No: 1, 2021 (46-57) Downloaded from https://edusj.mosuljournals.com/ 47 رتفريش ططخمو .لموك فا رجنلاا جذومن قيبطت مت – اشتنلاا ر ، ةبسانم ةيدودح طورش مادختسابو لحلل تابيرقت ةدع ءا رجا دعب يئانث ىلع pn وتلا ةلاح يف اوتلا مدعو نزا .ةفرغلا ةرا رح ةجرد دنع نز ح جمانرب دادعإب ةاكاحم ءا رجا مت ا س و ةغلب يب MATLAB نوكيلسلا يئانثل تاملعم ىلع لوصحلاو pn نم لك ىلع لوصحلا مت ذا .ةفاسملل ةلادك ليصوتلا ةمزح ، تلاماحلا زيكرت ، لاجملا لا ةلاح يف ةفاسملل ةلادك ةنحشلا ةفاثكو يئابرهكلا امدنع يا نزاوت NA = ND امدنع يا نزاوتلا مدع ةلاح يفو NA > ND .نيتلاحلا نيب ةنراقملا تمتو :ةلادلا تاملكلا يئانث ةاكاحم pn نا جذومن ، فارج نا .لموك ةقيرط ","PeriodicalId":15610,"journal":{"name":"Journal of Education Science","volume":"40 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74035362","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 : 2020-08-29DOI: 10.31185/eduj.vol2.iss40.1621
أنوار غانم يحيى الطائي
بناء مقياس التبدل الوجداني لطلاب كلية التربية البدنية وعلوم الرياضة في جامعة الموصل . التعرف على مستوى ( درجة ) التبدل الوجداني لطلاب كلية التربية البدنية وعلوم الرياضة في جامعة الموصل . وضع مستويات معيارية لطلاب كلية التربية البدنية وعلوم الرياضة في جامعة الموصل بمقياس التبدل الوجداني . يتم استخدام المنهج الوصفي بالأسلوب المسحي يتكون مجتمع البحث من (420) طالب في كلية التربية البدنية وعلوم الرياضة ، أما عينة البناء تشمل (252) طالب يمثلون تقريباً نسبة (60٪) ، إذ تم اختيار (45) طالب من عينة البناء لإجراء التجارب الاستطلاعية للمقياس ويتم استبعادهم من عينة البحث ، و(162) طالب لإجراء صدق البناء (التحليل ألإحصائي للفقرات) (عينة التمييز) ، و(45) طالب لاستخراج معامل الثبات ، ويتم استبعادهم من عينة البحث ، أما عينة التطبيق تتكون من (168) طالب يمثلون نسبة (40٪) من عينة البحث . يتم استخدام مقياس التبدل الوجداني كأداة لجمع البيانات أما إجراءات البناء فهي : ( تحديد أبعاد المقياس ، تحديد أسلوب صياغة فقرات المقياس، صياغة فقرات كل بعد بصورتها الأولية ، فضلاً عن اعتماد الخطوات والإجراءات العلمية في بناء المقاييس والمتضمنة بصدق المحتوى والصدق الظاهري للمقياس وصدق البناء المتمثل (بالتحليل الإحصائي للفقرات ) بأسلوبي المجموعتين المتضادتين والاتساق الداخلي , ويتم استخدام طريقة التجزئة النصفية في الثبات . الوسائل الإحصائية المستخدمة ( المتوسط الحسابي،المنوال،الانحراف المعياري معادلة معامل الالتواء لـ( كارل بيرسون)،معامل الارتباط البسيط،اختبار(t)،المتوسط الفرضي للمقياس، النسبة المئوية ) .
{"title":"\" بناء مقياس التبدل الوجداني لطلاب كلية التربية البدنية وعلوم الرياضة في جامعة الموصل\"","authors":"أنوار غانم يحيى الطائي","doi":"10.31185/eduj.vol2.iss40.1621","DOIUrl":"https://doi.org/10.31185/eduj.vol2.iss40.1621","url":null,"abstract":"\u0000بناء مقياس التبدل الوجداني لطلاب كلية التربية البدنية وعلوم الرياضة في جامعة الموصل . \u0000التعرف على مستوى ( درجة ) التبدل الوجداني لطلاب كلية التربية البدنية وعلوم الرياضة في جامعة الموصل . \u0000 \u0000وضع مستويات معيارية لطلاب كلية التربية البدنية وعلوم الرياضة في جامعة الموصل بمقياس التبدل الوجداني . يتم استخدام المنهج الوصفي بالأسلوب المسحي \u0000 يتكون مجتمع البحث من (420) طالب في كلية التربية البدنية وعلوم الرياضة ، أما عينة البناء تشمل (252) طالب يمثلون تقريباً نسبة (60٪) ، إذ تم اختيار (45) طالب من عينة البناء لإجراء التجارب الاستطلاعية للمقياس ويتم استبعادهم من عينة البحث ، و(162) طالب لإجراء صدق البناء (التحليل ألإحصائي للفقرات) (عينة التمييز) ، و(45) طالب لاستخراج معامل الثبات ، ويتم استبعادهم من عينة البحث ، أما عينة التطبيق تتكون من (168) طالب يمثلون نسبة (40٪) من عينة البحث . \u0000يتم استخدام مقياس التبدل الوجداني كأداة لجمع البيانات \u0000 أما إجراءات البناء فهي : ( تحديد أبعاد المقياس ، تحديد أسلوب صياغة فقرات المقياس، صياغة فقرات كل بعد بصورتها الأولية ، فضلاً عن اعتماد الخطوات والإجراءات العلمية في بناء المقاييس والمتضمنة بصدق المحتوى والصدق الظاهري للمقياس وصدق البناء المتمثل (بالتحليل الإحصائي للفقرات ) بأسلوبي المجموعتين المتضادتين والاتساق الداخلي , ويتم استخدام طريقة التجزئة النصفية في الثبات . \u0000الوسائل الإحصائية المستخدمة ( المتوسط الحسابي،المنوال،الانحراف المعياري معادلة معامل الالتواء لـ( كارل بيرسون)،معامل الارتباط البسيط،اختبار(t)،المتوسط الفرضي للمقياس، النسبة المئوية ) .","PeriodicalId":15610,"journal":{"name":"Journal of Education Science","volume":"29 1","pages":"293-312"},"PeriodicalIF":0.0,"publicationDate":"2020-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80517703","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 : 2020-08-27DOI: 10.33899/EDUSJ.2020.127225.1089
H. Hameed, Hiyam N. Maty, F. Isihak
{"title":"Pathophysiological consequences of SARS CoV-2","authors":"H. Hameed, Hiyam N. Maty, F. Isihak","doi":"10.33899/EDUSJ.2020.127225.1089","DOIUrl":"https://doi.org/10.33899/EDUSJ.2020.127225.1089","url":null,"abstract":"","PeriodicalId":15610,"journal":{"name":"Journal of Education Science","volume":"61 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79594797","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 : 2020-08-27DOI: 10.33899/EDUSJ.2020.127648.1091
S. Al-Thanoon, A. Ashgar
{"title":"Histopathological changes that induced by Monsodium glutamate and Sodium nitrite on the eyes of white mice Mus musculus and the protective role of Grape seeds oil","authors":"S. Al-Thanoon, A. Ashgar","doi":"10.33899/EDUSJ.2020.127648.1091","DOIUrl":"https://doi.org/10.33899/EDUSJ.2020.127648.1091","url":null,"abstract":"","PeriodicalId":15610,"journal":{"name":"Journal of Education Science","volume":"60 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83996072","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 : 2020-08-23DOI: 10.33899/edusj.2020.127113.1072
Subhi Jarullah, Asmaa Hamza Abbas Al-Hashemi
A simple, accurate and sensitive indirect spectrophotometric method has been developed for the determination of salbutamol sulphate and mefenamic acid in pure forms and in pharmaceutical preparations (capsule, syrup, tablet). This method based on the bromination of the drug with Nbromosuccinimide in acidic medium and the unreacted oxidizing agent react with constant amount of Azur-A dye solution due to bleach their colour and measured the absorbance of the residual colour dye at 606.5 nm.The molar absorptivity for salbutamol sulphate and mefenamic acid are 2.3 × 10 L.mol .cm and 8.1× 10 L.mol.cm respectively. Beer's Law was obeyed over the concentration range of 1.6 -12.8 μg/ml for salbutamol sulphate and1.6 -13.6 μg/ml for mefenamic acid. The limit of detection (LOD) were 0.0367μg/ml and limit of quantitation (LOQ) were 0.1226 μg/ml for both drugs. In addition, the recovery levels of the drugs were in the range 100.56% and 100.74%. The method was created to be simple, cost-effective and rapid because it does not involve any solvent extraction. The developed method was successfully applied for the determination of the studied drugs.
{"title":"Spectrophotometric Determination of Salbutamol Sulphate and Mefenamic Acid Using Azur-A Dye in Presence of Oxidizing Agent N-bromosuccinimide","authors":"Subhi Jarullah, Asmaa Hamza Abbas Al-Hashemi","doi":"10.33899/edusj.2020.127113.1072","DOIUrl":"https://doi.org/10.33899/edusj.2020.127113.1072","url":null,"abstract":"A simple, accurate and sensitive indirect spectrophotometric method has been developed for the determination of salbutamol sulphate and mefenamic acid in pure forms and in pharmaceutical preparations (capsule, syrup, tablet). This method based on the bromination of the drug with Nbromosuccinimide in acidic medium and the unreacted oxidizing agent react with constant amount of Azur-A dye solution due to bleach their colour and measured the absorbance of the residual colour dye at 606.5 nm.The molar absorptivity for salbutamol sulphate and mefenamic acid are 2.3 × 10 L.mol .cm and 8.1× 10 L.mol.cm respectively. Beer's Law was obeyed over the concentration range of 1.6 -12.8 μg/ml for salbutamol sulphate and1.6 -13.6 μg/ml for mefenamic acid. The limit of detection (LOD) were 0.0367μg/ml and limit of quantitation (LOQ) were 0.1226 μg/ml for both drugs. In addition, the recovery levels of the drugs were in the range 100.56% and 100.74%. The method was created to be simple, cost-effective and rapid because it does not involve any solvent extraction. The developed method was successfully applied for the determination of the studied drugs.","PeriodicalId":15610,"journal":{"name":"Journal of Education Science","volume":"29 1","pages":"222-244"},"PeriodicalIF":0.0,"publicationDate":"2020-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75502314","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 : 2020-08-16DOI: 10.33899/edusj.2020.127190.1078
A. I. Rashan, O. Al-Abbasy
Enzymatic browning by tyrosinase and nonenzymatic browning (Maillard reaction) are responsible for producing new compounds which contributes considerably to the undesirable of aroma, taste and colour in food . In this study, tyrosinase activity and browning intensity in quince juice were inhibited by treating them with antioxidant compounds vanillin, glutathione and melatonin as compared to the control. The maximum inhibition percentage of Tyrosinase were 83, 68.8 and 90.3 % and the maximum inhibitory effect of browning intensity were 13.9, 9.7 and 29.8% respectively. For untreated quince juice which heated to 5 hours at 100 C, the results showed increasing in A294, Browning intensity (A420) and reducing power, as well as decreasing in reducing sugar, free amino group, phenolic compounds contents and inhibition percentage of lipid peroxidation. The decreasing of A294, browning intensity and increasing in reducing power were showed after treating with (10mM) vanillin and (8mM) glutathione compared to control. Conversely to glutathione, the addition of vanillin to quince juice revealed increasing in inhibition percentage of lipid peroxidation, reducing sugar and phenolic contents and decreasing in free amino acid content compared to control. Inhibition Mode of tyrosinase by melatonin was noncompetitive. The Km value remained constant (1.96mM), while Vmax reduced from 228.13 to 114.06 U.ml.min. Inhibition constant Ki value was 6.9 mM.
酪氨酸酶的酶促褐变和非酶促褐变(美拉德反应)是产生新的化合物的原因,这些化合物对食物的香气、味道和颜色有很大的影响。在本研究中,与对照相比,用抗氧化剂香草醛、谷胱甘肽和褪黑素处理木瓜汁可以抑制其酪氨酸酶活性和褐变强度。对酪氨酸酶的最大抑制率分别为83%、68.8和90.3%,对褐变强度的最大抑制率分别为13.9%、9.7和29.8%。结果表明,未经处理的榅桲汁在100℃下加热5 h后,其A294、褐变强度(A420)和还原力均有所增加,还原糖、游离氨基、酚类化合物含量和脂质过氧化抑制率均有所下降。与对照相比,(10mM)香兰素和(8mM)谷胱甘肽处理后A294的褐变强度降低,还原力增强。与谷胱甘肽相反,加入香兰素对柑汁的脂质过氧化、还原糖和酚类含量的抑制率均高于对照,而游离氨基酸含量则低于对照。褪黑素对酪氨酸酶的抑制模式是非竞争性的。Km值保持不变(1.96mM),而Vmax从228.13 μ m .min降低到114.06 μ m .min。抑制常数Ki值为6.9 mM。
{"title":"The Effect of Some Antioxidants Compounds on Enzymatic and Nonenzymic Browning of Quince Juice During Thermal Treatment","authors":"A. I. Rashan, O. Al-Abbasy","doi":"10.33899/edusj.2020.127190.1078","DOIUrl":"https://doi.org/10.33899/edusj.2020.127190.1078","url":null,"abstract":"Enzymatic browning by tyrosinase and nonenzymatic browning (Maillard reaction) are responsible for producing new compounds which contributes considerably to the undesirable of aroma, taste and colour in food . In this study, tyrosinase activity and browning intensity in quince juice were inhibited by treating them with antioxidant compounds vanillin, glutathione and melatonin as compared to the control. The maximum inhibition percentage of Tyrosinase were 83, 68.8 and 90.3 % and the maximum inhibitory effect of browning intensity were 13.9, 9.7 and 29.8% respectively. For untreated quince juice which heated to 5 hours at 100 C, the results showed increasing in A294, Browning intensity (A420) and reducing power, as well as decreasing in reducing sugar, free amino group, phenolic compounds contents and inhibition percentage of lipid peroxidation. The decreasing of A294, browning intensity and increasing in reducing power were showed after treating with (10mM) vanillin and (8mM) glutathione compared to control. Conversely to glutathione, the addition of vanillin to quince juice revealed increasing in inhibition percentage of lipid peroxidation, reducing sugar and phenolic contents and decreasing in free amino acid content compared to control. Inhibition Mode of tyrosinase by melatonin was noncompetitive. The Km value remained constant (1.96mM), while Vmax reduced from 228.13 to 114.06 U.ml.min. Inhibition constant Ki value was 6.9 mM.","PeriodicalId":15610,"journal":{"name":"Journal of Education Science","volume":"84 1","pages":"206-221"},"PeriodicalIF":0.0,"publicationDate":"2020-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73546329","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 : 2020-08-15DOI: 10.33899/EDUSJ.2020.127127.1076
A. Kamal, Manaf A.Hassan al-azzawi
Abstract Glasses with compositions (100-x) % Na2B4O7–x % MO (X=10,20,30,40) where (M) is Ba, Mg and Ca, are prepared using conventional melt quenching method. X-rays diffractions are performed. The result of (XRD) confirm the amorphous nature of the samples. The measured density increases with increasing content of BaO, MgO & CaO in glass network. The position and shifting rate of absorption edge, optical band energy (Eopt) and band tails energy (Eo) were investigated. The Eopt and Eo values of all glasses studied in this work were found to be comparable with the values corresponding to some semiconductors. The structure of the glasses was investigated by means of IR spectroscopy. It found from the experimental results of IR spectra that the groups (BO3) and (B2O7) are dominant the structure of these glasses. Also It is found that the shifting in band position is small with increasing of (Ba, Mg, Ca) oxide in the glass network.
摘要采用传统的熔体淬火法制备了成分为(100-x) % Na2B4O7-x % MO (X=10,20,30,40)的玻璃,其中(M)为Ba, Mg和Ca。进行x射线衍射。XRD结果证实了样品的非晶态性质。测定密度随玻璃网络中BaO、MgO和CaO含量的增加而增加。研究了吸收边的位置和移动速率、光带能(Eopt)和带尾能(Eo)。本文所研究的所有玻璃的Eopt和Eo值与某些半导体的Eopt和Eo值相当。用红外光谱对玻璃的结构进行了研究。红外光谱的实验结果表明,这些玻璃的主要结构是BO3和B2O7基团。同时发现,随着(Ba, Mg, Ca)氧化物在玻璃网络中的含量增加,能带位置的移动很小。
{"title":"A Study of Optical Properties of Tetraborate Glasses Containing CaO, MgO & BaO","authors":"A. Kamal, Manaf A.Hassan al-azzawi","doi":"10.33899/EDUSJ.2020.127127.1076","DOIUrl":"https://doi.org/10.33899/EDUSJ.2020.127127.1076","url":null,"abstract":"Abstract Glasses with compositions (100-x) % Na2B4O7–x % MO (X=10,20,30,40) where (M) is Ba, Mg and Ca, are prepared using conventional melt quenching method. X-rays diffractions are performed. The result of (XRD) confirm the amorphous nature of the samples. The measured density increases with increasing content of BaO, MgO & CaO in glass network. The position and shifting rate of absorption edge, optical band energy (Eopt) and band tails energy (Eo) were investigated. The Eopt and Eo values of all glasses studied in this work were found to be comparable with the values corresponding to some semiconductors. The structure of the glasses was investigated by means of IR spectroscopy. It found from the experimental results of IR spectra that the groups (BO3) and (B2O7) are dominant the structure of these glasses. Also It is found that the shifting in band position is small with increasing of (Ba, Mg, Ca) oxide in the glass network.","PeriodicalId":15610,"journal":{"name":"Journal of Education Science","volume":"11 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84190483","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 : 2020-08-15DOI: 10.33899/edusj.2020.127562.1087
Zainab Muataz Mahmood, A. K. Ahmad
In this paper , number of heterocyclic compound with five and six membered, Such as substituted imidazole, triazin and thiazolidine. The compound N-(1,3benzothiazol-2-yl)-2-chloro acetamide was prepared from the reaction of the 2-amino benzothiazole with chloroacetyl chloride. The product N-(1,3-benzothiazol -2-yl) -2chloro acetamide was reacted with thiourea and urea to prepare both 4-(1.3benzothiazol -2-yl amino) -1,5-dihydro -2H-imidazole -2-thione and 4-(1,3benzothiazol -2-yl amino) -1,5-dihydro -2H-imidazol -2-one, respectively. As did compound N-(1,3-benzothiazol -2-yl) -2-chloro acetamide with thiosemicarbazide and semicarbazide to prepared the two compounds 5-(1,3-benzothiazol -2-yl amino) 1,6-dihydro -1,2,4-triazine -3(2H)-thione and 5-(1,3-benzothiazol -2-yl amino) -1,6dihydro -1,2,4-triazine -3(2H)-one, respectively. Also compound N-(1,3-benzothiazol -2-yl) -2-chloro acetamide with ammonium thiocyanate to prepare the compound 3(1,3-benzothiazol -2-yl amino) thiazolidin -4-one. From the reaction of compound N(1,3-benzothiazol -2-yl) -2-chloro acetamide with phenyl thiourea attended 4-(1,3benzothiazol -2-yl amino) -1-phenyl -1,5 -dihydro 2H-imidazole -2-thio. Also from the reaction of 2-amino benzothiazole with phthalic anhydride or malic anhydride attended compounds2(1,3-benzothiazol -2-yl carbonyl) benzoic acid and 4-(1,3benzothiazol -2-yl amino) -4-oxobut-2-enoic acid and 2-(1H-benzoimidazol -2-yl) –N-(1,3-benzothiazol -2-yl) benzamide and 3-(1Hbenzoimidazol -2-yl) –N-(1,3-benzothiazol -2-yl) acrylamide, respectively. And by reaction compound 2(1,3-benzothiazol -2-yl carbonyl) benzoic acid and 4-(1,3benzothiazol -2-yl amino) -4-oxobut-2-enoic acid or 2-(1H-benzoimidazol -2-yl) –N(1,3-benzothiazol -2-yl) benzamide and 3-(1H-benzoimidazol -2-yl) –N-(1,3benzothiazol -2-yl) acrylamide with o-phenylene diamine attended compounds 2(1H-benzoimidazol -2-yl) –N-(1,3-benzothiazol -2-yl) benzamide and 3-(1Hbenzoimidazol -2-yl) –N-(1,3-benzothiazol -2-yl) acrylamide, respectively. The synthesized compounds are identified by physical melting points, color change and spectroscopic methods such as IR, proton-NMR.
本文介绍了取代咪唑、三嗪和噻唑烷等五元和六元杂环化合物的数量。以2-氨基苯并噻唑与氯乙酰氯为原料,合成了N-(1,3苯并噻唑-2-基)-2-氯乙酰胺。将产物N-(1,3-苯并噻唑-2-基)- 2氯乙酰胺与硫脲和尿素反应,分别制得4-(1.3苯并噻唑-2-基氨基)-1,5-二氢- 2h -咪唑-2-硫酮和4-(1,3苯并噻唑-2-基氨基)-1,5-二氢- 2h -咪唑-2-酮。将化合物N-(1,3-苯并噻唑-2-基)- 2-氯乙酰胺与硫代氨基脲和缩氨基脲分别制备为5-(1,3-苯并噻唑-2-基氨基)1,6-二氢-1,2,4-三嗪-3(2H)-硫酮和5-(1,3-苯并噻唑-2-基氨基)- 1,6-二氢-1,2,4-三嗪-3(2H)- 1。又与硫氰酸铵复配N-(1,3-苯并噻唑-2-基)-2-氯乙酰胺,制得化合物3(1,3-苯并噻唑-2-基氨基)噻唑烷-4-酮。由化合物N(1,3-苯并噻唑-2-基)-2-氯乙酰胺与苯基硫脲反应得到4-(1,3 -苯并噻唑-2-基氨基)-1-苯基-1,5 -二氢2h -咪唑-2-硫。由2-氨基苯并噻唑与邻苯二酸酐或苹果酸酐反应得到2(1,3-苯并噻唑-2-羰基)苯甲酸、4-(1,3 -苯并噻唑-2-基氨基)-4-氧丁-2-烯酸、2-(1h -苯并咪唑-2-基)- n -(1,3-苯并噻唑-2-基)苯酰胺和3-(1 -苯并咪唑-2-基)- n -(1,3-苯并噻唑-2-基)丙烯酰胺。通过化合物2(1,3-苯并噻唑-2-基羰基)苯甲酸与4-(1,3 -苯并噻唑-2-基氨基)-4-氧丁-2-烯酸或2-(1h -苯并咪唑-2-基)- n(1,3-苯并噻唑-2-基)苯酰胺和3-(1h -苯并咪唑-2-基)- n -(1,3-苯并噻唑-2-基)丙烯酰胺与邻苯二胺反应,分别得到化合物2(1h -苯并咪唑-2-基)- n -(1,3-苯并噻唑-2-基)丙烯酰胺和3-(1h -苯并咪唑-2-基)- n -(1,3-苯并噻唑-2-基)丙烯酰胺。合成的化合物通过物理熔点、颜色变化和红外、质子核磁共振等光谱方法进行了鉴定。
{"title":"Synthesis of Some Heterocyclic Compounds Derived From 2-Amino Benzothiazole","authors":"Zainab Muataz Mahmood, A. K. Ahmad","doi":"10.33899/edusj.2020.127562.1087","DOIUrl":"https://doi.org/10.33899/edusj.2020.127562.1087","url":null,"abstract":"In this paper , number of heterocyclic compound with five and six membered, Such as substituted imidazole, triazin and thiazolidine. The compound N-(1,3benzothiazol-2-yl)-2-chloro acetamide was prepared from the reaction of the 2-amino benzothiazole with chloroacetyl chloride. The product N-(1,3-benzothiazol -2-yl) -2chloro acetamide was reacted with thiourea and urea to prepare both 4-(1.3benzothiazol -2-yl amino) -1,5-dihydro -2H-imidazole -2-thione and 4-(1,3benzothiazol -2-yl amino) -1,5-dihydro -2H-imidazol -2-one, respectively. As did compound N-(1,3-benzothiazol -2-yl) -2-chloro acetamide with thiosemicarbazide and semicarbazide to prepared the two compounds 5-(1,3-benzothiazol -2-yl amino) 1,6-dihydro -1,2,4-triazine -3(2H)-thione and 5-(1,3-benzothiazol -2-yl amino) -1,6dihydro -1,2,4-triazine -3(2H)-one, respectively. Also compound N-(1,3-benzothiazol -2-yl) -2-chloro acetamide with ammonium thiocyanate to prepare the compound 3(1,3-benzothiazol -2-yl amino) thiazolidin -4-one. From the reaction of compound N(1,3-benzothiazol -2-yl) -2-chloro acetamide with phenyl thiourea attended 4-(1,3benzothiazol -2-yl amino) -1-phenyl -1,5 -dihydro 2H-imidazole -2-thio. Also from the reaction of 2-amino benzothiazole with phthalic anhydride or malic anhydride attended compounds2(1,3-benzothiazol -2-yl carbonyl) benzoic acid and 4-(1,3benzothiazol -2-yl amino) -4-oxobut-2-enoic acid and 2-(1H-benzoimidazol -2-yl) –N-(1,3-benzothiazol -2-yl) benzamide and 3-(1Hbenzoimidazol -2-yl) –N-(1,3-benzothiazol -2-yl) acrylamide, respectively. And by reaction compound 2(1,3-benzothiazol -2-yl carbonyl) benzoic acid and 4-(1,3benzothiazol -2-yl amino) -4-oxobut-2-enoic acid or 2-(1H-benzoimidazol -2-yl) –N(1,3-benzothiazol -2-yl) benzamide and 3-(1H-benzoimidazol -2-yl) –N-(1,3benzothiazol -2-yl) acrylamide with o-phenylene diamine attended compounds 2(1H-benzoimidazol -2-yl) –N-(1,3-benzothiazol -2-yl) benzamide and 3-(1Hbenzoimidazol -2-yl) –N-(1,3-benzothiazol -2-yl) acrylamide, respectively. The synthesized compounds are identified by physical melting points, color change and spectroscopic methods such as IR, proton-NMR.","PeriodicalId":15610,"journal":{"name":"Journal of Education Science","volume":"10 1","pages":"193-205"},"PeriodicalIF":0.0,"publicationDate":"2020-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80122555","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}