نتایج جستجو برای: h2 و h1
تعداد نتایج: 794463 فیلتر نتایج به سال:
Six clinically healthy male water buffaloes (Bubalus bubalis) 2-3 years of age and weighing 290-325 kg were used for 2 different treatments (H1 and H2). The animals of group H1 were premedicated with medetomidine (2.5 g/kg,i.v.) and butorphanol (0.05 mg/kg, i.v.), while in group H2 midazolam (0.25 mg/kg) and butorphanol (0.05 mg/kg) were used intravenously. Induction of anaesthesia was achieved...
The effects of synchronous photo (16 h daylength) and thermo (2 degrees C daily fluctuation) cycles on flowering time were compared with constant light and temperature treatments using two barley mapping populations derived from the facultative cultivar 'Dicktoo'. The 'Dicktoo'x'Morex' (spring) population (DM) segregates for functional differences in alleles of candidate genes for VRN-H1, VRN-H...
Let A = ( H1 E ∗ E H2 ) and à = ( H1 O O H2 ) be Hermitian matrices with eigenvalues λ1 ≥ · · · ≥ λk and λ̃1 ≥ · · · ≥ λ̃k, respectively. Denote by ‖E‖ the spectral norm of the matrix E, and η the spectral gap between the spectra of H1 and H2. It is shown that |λi − λ̃i| ≤ 2‖E‖ η + √ η2 + 4‖E‖2 , which improves all the existing results. Similar bounds are obtained for singular values of matrices u...
We review some existing results on H2 and H1 estimation and explore possible connections between the optimal algorithms. For instance, in order to relate the H2 optimal Kalman lter to the H1 lters we show that, with special choices of the covariance matrices, the Kalman lter is H1 optimal. Moreover, by studying the matrix operator relating the estimation errors and the disturbances, we obtain s...
Let k ≥ 4, and let H1, H2 be connected graphs with |V (Hi)| ≥ 3 for i = 1, 2. A graph G is said to be {H1, . . . , Hl}-free if none of H1, . . . , Hl is an induced subgraph of G. We prove that if there exists a positive integer n0 such that every {H1, H2}-free graph G with |V (G)| ≥ n0 and δ(G) ≥ 3 contains k vertex-disjoint claws, then {H1, H2} ∩ {K1,t | t ≥ 2} = ∅. Also, we prove that every K...
The contributions of histamine (H1 or H2) receptor-mediated responses and, therefore, the effects of histamine blocking agents are unclear with regard to regulation of proximal epicardial and distal resistance coronary arteries. This study was designed to evaluate the effects of selective H1- and H2-receptor antagonists on epicardial and resistance vessels in the closed chest dog model. Histami...
We consider a Heegaard splitting M = H1 ∪S H2 of a 3-manifold M having an essential disk D ⊂ H1 and an essential surface F ⊂ H2 with |D ∩ F | = 1. (We require that ∂F ⊂ S when H2 is a compressionbody with ∂−H2 6= ∅.) Let F be a genus g surface with n boundary components. From M = H1∪S H2, we obtain a genus g(S)+2g+n−2 Heegaard splitting M = H 1 ∪S′ H ′ 2 by cutting H2 along F and attaching F ×I...
در این مطالعه اثرات تزریق داخل بطن مغزی هیستامین و آنتاگونیستهای گیرنده های h1 و h2 آن بر نسبت اخذ غذا به اخذ آب در خرگوش بررسی شده است . تزریقات داخل بطن مغزی نخاعی مصنوعی ( گروه کنترل ) ، هیستامین ، کلرفنیرامین ( آنتاگونیست h1) و سایمتیدین ( آنتاگونیست h2 ) از طریق کانولی که به روش جراحی استریوتاکسی در داخل بطن جانبی مغز قرار داده شده بود ، انجام گردید . نتایج نشان دادند که هیستامین در مقدار ...
Previous case-control studies showed that genetic variation in the fibrinogen gene (FGG) increased the risk for deep vein thrombosis (VT) in adults. We investigated the association between the fibrinogen (FGA) and FGG haplotypes, the factor VLeiden-mutation, and pediatric VT and thromboembolic stroke (TS) in 2 independent study samples. Association analysis revealed that the FGA-H1 and FGG-H2 h...
هدف: بررسی نقش مرکزی هیستامین و گیرنده های H1 و H2 آن در رفتار خرگوش. طرح: مطالعه تجربی. حیوانات: سی و پنج قطعه خرگوش سفید نیوزیلندی نر با وزن 5/2-2 کیلوگرم. روش: قرار دادن کانول استانلیس استیل راهنما به شماره 23 و به طول 15 میلیمتر در داخل بطن جانبی مغز خرگوش، تزریقات داخل بطن مغزی سالین نرمال ( کنترل )، هیستامین ( 50 میلی گرم )، پرومتازین ( آنتاگونیست H1 ، 00 میکروگرم )، رانیتیدین ( آنتاگو...
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