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Now showing items 2821-2830 of 15116
Bacillus thuringiensis strains isolated from Qatari soil, synthesizing δ-endotoxins highly active against the disease vector insect Aedes aegypti Bora Bora
(
Elsevier
, 2020 , Article)
© 2020 Bacillus thuringiensis (Bt) is a Gram-positive soil bacterium that has been recognized as an effective bioinsecticide active against plant, animal and human pathogenic and disease vector insects. During its sporulation ...
Copper-Catalyzed Dual Cyclization for the Synthesis of Quinindolines
(
MDPI
, 2020 , Article)
A synthetic approach to quinindoline derivatives by the Cu-catalyzed dual cyclization has been developed. This catalytic reaction is a practical method for the systematic synthesis of quinindoline core structure, which ...
Agroecology as a Climate Change Adaptation Strategy for Smallholders of Tehri-Garhwal in the Indian Himalayan Region
(
Springer Netherlands
, 2017 , Article)
Climate change is expected to increase temperatures and rainfall in the Himalayan region and place stress on local livelihoods by affecting agro-biodiversity, crop yield, cropping patterns and the species composition of ...
التقييم في التعليم عن بُعد: غير تقليدي هو الآخر
(
TLBNews
, 2020 , Article)
الخبرة والتعايش مع الوسط الأكاديمي تجعلني أميلُ إلى أن يكون التقييم في نظام التعليم عن بُعد بمنظورٍ غير تقليدي هو الأخر، منظورٍ يقوم على اعتماد حزمةٍ من الأدوات والوسائل المتعددة والمرنة بحيث تسمح هذه الحزمة من الأدوات ...
أصول المنهج العلمي وأساليبه في السنة النبوية : دراسة مقارنة بين كتاب العلم من صحيح البخاري ومعطيات مناهج البحث العلمي المعاصر
(
دار البصائر للطباعة والنشر والتوزيع
, 2009 , Article)
إن تخلف المسلمين عن ركب الحضارة هو الدافع وراء كتابة هذا البحث فمن الضروري أن يقف كل مسلم علي أسباب تقدم الأجداد من المسلمين في مجالات البحث العلمي ومعرفة أسباب قوتهم؛ فبدأ البحث بتمهيد وهو الحديث عن اهتمام القرآن بالعلم؛ ...
Effect of initial and final curing on performance of concrete in hot and arid climates
(
Wiley-Blackwell
, 2019 , Article)
The effect of initial and final curing conditions of ordinary concrete cast in regions with harsh environmental conditions on the compressive strength and microstructure of concrete is investigated in this research. More ...
Amna Mahmoud Al-Jaydah, a pioneer in the struggle for female education in Qatar: A biographical research study
(
Routledge
, 2017 , Article)
Much of the historical data, often narratives, on 19th and early 20th century women teachers in the West highlights the ways in which these women educators were influenced by religious institutions and/or the cultural, ...
Umbelliferone inhibits spermatogenic defects and testicular injury in lead-intoxicated rats by suppressing oxidative stress and inflammation, and improving Nrf2/HO-1 signaling
(
Dove Medical Press
, 2020 , Article)
© 2020 Alotaibi et al. Introduction: Lead (Pb) is an environmental toxic metal that threatens human health. Umbelliferone (UMB) is a coumarin with known medicinal and protective properties against cytotoxicity. This study ...
Changes in expression of Kv7.5 and Kv7.2 channels in dorsal root ganglion neurons in the streptozotocin rat model of painful diabetic neuropathy
(
Elsevier
, 2020 , Article)
Diabetic peripheral neuropathic pain (DPNP), the most debilitating complication of diabetes mellitus, is resistant to current therapy. The pathogenesis of DPNP is still elusive, but several mechanisms have been proposed ...
Carbonization conditions influence the emission characteristics and the stability against photobleaching of nitrogen doped carbon dots
(
Royal Society of Chemistry
, 2017 , Article)
Carbon Dots (CDs), fabricated by hydrothermal bottom-up synthesis, are complex materials, whose optical properties are influenced by multiple factors. The presence of domains of conjugated sp2 carbon, which are formed upon ...