rmelkhatib

أ. د. رأفت محمد أحمد محمد أحمد الخطيب

استاذ - أستاذ بقسم الكيمياء

كلية العلوم

العنوان: قسم الكيمياء - كلية العلوم - جامعة سوهاج

7

إعجاب

المنشورات و المؤلفات التي تحتوي علي الكلمة المفتاحية:


2019-07-28 23:44:10 الكلمات المفتاحية Cotton, fungus, thermal aging, ,
Studying the Effect of Fungal Spots with Thermal Aging on Cotton Textiles
Cotton textiles are rare and rarely found in museums. In the presence of such textiles in uncontrolled museums condition, they are more vulnerable to damage by heat, humidity, insects, microorganisms "bacteria, fungi", This study presents the results of study of one of the most dangerous factors damage to cellulosic textile "cotton", microorganisms "fungi" In the presence of accelerated artificial aging,, ... إقراء المزيد

2019-08-04 21:26:18 الكلمات المفتاحية Space modulation techniques, , Space modulation techniques, Spectral efficency, Computational complexity,
Fully-Quadrature Spatial Modulation over Rician Fading Channels
Space modulation techniques (SMTs) are promising multiple-input multiple-output (MIMO) schemes that draw an intriguing attention lately due to their superior performance enhancement in terms of energy efficiency, spectral efficiency, and unpretentious receiver's complexity. In the SMTs, the indices of the building blocks of the communication system are harnessed in an innovative way to embed an additional information. As such, the ... إقراء المزيد

2019-08-24 14:34:00 الكلمات المفتاحية Fasciola, , Hydatid, , Cysticercus, Sarcocystis, cattle, Buffalo,
Prevalence of Tissue Parasites in Cattle and Buffaloes Slaughtered in El-Minia Governorate Abattoirs, Egypt
Abstract: The present study was conducted to determine the prevalence of meat borne parasitic infection in 170 animals (120 cattle and 50 buffaloes) slaughtered in El-Minia Governorate abattoirs, during the period from June 2017 to May 2018. The obtained data were statistically analysed by SPSS software using ANOVA test at 95 % confidence level (P ≤ 0.05). The study revealed ... إقراء المزيد

2019-08-24 14:34:00 الكلمات المفتاحية Fasciola, , Hydatid, , Cysticercus, Sarcocystis, cattle, Buffalo,
Prevalence of Tissue Parasites in Cattle and Buffaloes Slaughtered in El-Minia Governorate Abattoirs, Egypt
Abstract: The present study was conducted to determine the prevalence of meat borne parasitic infection in 170 animals (120 cattle and 50 buffaloes) slaughtered in El-Minia Governorate abattoirs, during the period from June 2017 to May 2018. The obtained data were statistically analysed by SPSS software using ANOVA test at 95 % confidence level (P ≤ 0.05). The study revealed ... إقراء المزيد

β-RA reduces DMQ/CoQ ratio and recues the encephalopathic phenotype in Coq9R239X mice
Coenzyme Q (CoQ) deficiency has been associated with primary defects in the CoQ biosynthetic pathway or to secondary events. In some cases, the exogenous CoQ supplementation has limited efficacy. In the Coq9R239X mouse model with fatal mitochondrial encephalopathy due to CoQ deficiency, we have tested the therapeutic potential of b-resorcylic acid (b-RA), a structural analog of the CoQ precursor 4-hydroxybenzoic ... إقراء المزيد

2019-10-04 04:46:42 الكلمات المفتاحية UV-Irradiation, , TiO2, Energy Production,
Near UV-irradiation of CuOx-impregnated TiO2 providing active species for H2 production through methanol photoreforming
Copper doped‐TiO2 (P25) nanomaterials have been intensively studied as promising catalysts for H2 production by photo‐reforming of selected organic compounds. However, the role of copper oxidation states on the improvement of photocatalytic activity is still debated. In this work, CuOx‐impregnated P25‐TiO2 catalysts were used for photocatalytic production of hydrogen from methanol. Copper species/oxidation states both in the as‐prepared catalysts and ... إقراء المزيد

Closed-Chamber Anterior Capsulorhexis Under Air Tamponade In White Cataract
Purpose: To evaluate the efficacy and safety of a closed-chamber air bubble capsulotomy technique to prevent the Argentinean flag sign (AFS) in patients with white and intumescent cataracts. Setting: Sohag University, Faculty of Medicine, Ophthalmology Department, Sohag, Egypt. Design: Prospective interventional noncomparative case series. Methods: Eighty-two eyes of 80 patients with white and intumescent cataracts were included. Eyes with any ... إقراء المزيد

Closed-Chamber Anterior Capsulorhexis Under Air Tamponade In White Cataract
Purpose: To evaluate the efficacy and safety of a closed-chamber air bubble capsulotomy technique to prevent the Argentinean flag sign (AFS) in patients with white and intumescent cataracts. Setting: Sohag University, Faculty of Medicine, Ophthalmology Department, Sohag, Egypt. Design: Prospective interventional noncomparative case series. Methods: Eighty-two eyes of 80 patients with white and intumescent cataracts were included. Eyes with any ... إقراء المزيد

2019-12-04 13:09:08 الكلمات المفتاحية Single Vein, Perforator Flap, ,
Safety of Single Vein Anastomosis versus Double Venous Anastomosis in ALT Perforator Flap in Foot and Leg Reconstruction
Introduction: Single or double venous anastomosis in free flap in general and ALT, in particular, is still a matter of debate between micro vascular surgeons. In this study, we will present our experience in single vein anastomosis versus double venous anastomosis in ALT perforator flap used in leg and foot reconstruction as regarding flap outcome, complications, operation time and the ... إقراء المزيد

2019-12-14 20:14:42 الكلمات المفتاحية Mareks disease virus- EBERs, ,
Epstein-Barr virus-encoded RNAs (EBERs) complement the loss of Herpesvirus telomerase RNA (vTR) in virus-induced tumor formation
Marek’s disease virus (MDV) is an alphaherpesvirus that causes fatal lymphomas in chickens and is used as a natural virus-host model for herpesvirus-induced tumorigenesis. MDV encodes a telomerase RNA subunit (vTR) that is crucial for efficient MDV-induced lymphoma formation; however, the mechanism is not completely understood. Similarly, Epstein Barr-virus (EBV) encodes two RNAs (EBER-1 and EBER-2) that are highly expressed ... إقراء المزيد