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تعداد نتایج: 1362 فیلتر نتایج به سال:
A novel bipolar host 9-(4-(9H-pyrido[2,3-b]indol-9-yl)phenyl)-9H-3,9'-bicarbazole (pBCb2Cz) was prepared for high efficiency blue phosphorescent organic light-emitting diodes (PhOLEDs), a high triplet energy (ET) material, employing electron-deficient α-carboline. pBCb2Cz (ET = 2.93 eV) was effective as a host material for FIrpic- and FCNIrpic-based blue PhOLEDs, and highest quantum efficiencie...
The synthesis of five new tetracyclic benzopsoralen analogues, compounds 2-6, with 9H-xanthen-9-one or 9H-carbazole frameworks, is described. Their inhibitory effects on the growth of three human tumor cell lines (MCF-7, SF-268, and NCI-460) were evaluated, and discussed in terms of structure-activity relationship, taking into account both geometric and electronic features. Generally, the angul...
A series of novel 5-[(9H-carbazol-9-yl)methyl]-N-[(substituted phenyl)(piperazin-1-yl)methyl]-1,3,4-oxadiazol-2-amines (4a–o) derivatives was synthesized by starting with carbazole, which on reaction with ethyl chloroacetate yielded ethyl 2-(9H-carbazole-9-yl)acetate (1). Compound 1 on reaction with semicarbazide followed by cyclisation with sulphuric acid gave 5-((9H-carbazole-9-yl)-1,3,4-oxad...
A dibenzosilole-based host material was designed and characterized. The material, 9,9′-(5,5-diphenyl-5H-dibenzo[b, d]silole-2,8-diyl)bis(9H-carbazole) (S-SiCz), to enhance the electron transport properties rigidity by coupling two phenyl units of tetraphenyl silane a strong hole type bis(4-(9H-carbazol-9-yl)phenyl)diphenylsilane host. device efficiency roll-off improved considerably balancing c...
Polyhalogenated carbazoles (PHCZs) are persistent chemical pollutants increasingly detected in different environmental matrices. They structurally and chemically similar to other organic (POPs), which capable of disrupting the endocrine systems. However, PHCZs such as 3-chloro-9H-carbazole (3-CCZ), 3-bromo-9H-carbazole (3-BCZ), 36-dibromo-9H-carbazole (36-BCZ) rarely discussed context their adv...
Bicarbazole derivatives, 9,9'-bis(dibenzo[b,d]thiophen-2-yl)-9H,9'H-3,3'-bicarbazole (BCzDBT), 9,9'-bis(dibenzo[b,d]furan-2-yl)-9H,9'H-3,3'-bicarbazole (BCzDBF), and 9,9'-di([1,1'-biphenyl]-3-yl)-9H,9'H-3,3'-bicarbazole (BCzBP), were designed and examined as the hole transport type host materials of the tris[1-(2,4-diisopropyldibenzo[b,d]furan-3-yl)-2-phenylimidazole] (Ir(dbi)3) blue triplet em...
تعداد 22 نمونه بافتی از گله های طیور مبتلا به بیماری های تنفسی ارجاعی به آزمایشگاه ویروس شناسی بخش طیور دانشکده دامپزشکی طی سال های 85-1383 گرفته شده و به منظور جداسازی ویروس آنفلوانزا ی طیور بر طبق روش استاندارد به تخم مرغ های جنین دار 11-9 روزه تلقیح شدند. در آزمایش rt - pcr روی نمونه ها قسمتی از ژن هماگلوتینین 9hبا قطعه ای به طول bp435 با پرایمرهای اختصاصی تکثیر شد. نتایج نشان داد که آزمایش ...
The recovery of epididymal spermatozoa, their cryopreservation and posterior use on IVP of bovine embryos, has become an important tool to store genetic material from animals that have died unexpectedly or that have acquired reproductive inability. The present study aimed to evaluate the viability of spermatozoa from epididymides after their incubation on IVF medium supplemented or not with hep...
تعداد 22 نمونه بافتی از گله‌های طیور مبتلا به بیماری‌های تنفسی ارجاعی به آزمایشگاه ویروس شناسی بخش طیور دانشکده دامپزشکی طی سال‌های 85-1383 گرفته شده و به منظور جداسازی ویروس آنفلوانزا ی طیور بر طبق روش استاندارد به تخم‌مرغ‌های‌جنین‌دار 11-9 روزه تلقیح شدند. در آزمایش RT - PCR روی نمونه‌ها قسمتی از ژن هماگلوتینین 9Hبا قطعه ای به طول bp435 با پرایمرهای اختصاصی تکثیر شد. نتایج نشان داد ک...
Carbazole-based materials adopting the nonconjugated substitution of triphenylsilyl (-SiPh(3)) and trityl (-CPh(3)) side groups are studied as high-triplet-energy, morphologically, and electrochemically stable host materials with tunable carrier-transport properties for organic blue electrophosphorescence. The developed host materials 9-(4-tert-butylphenyl)-3,6-bis(triphenylsilyl)-9H-carbazole ...
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