Most types of retinal neurons are spatially positioned in non-random patterns, termed retinal mosaics. Several developmental mechanisms are thought to be important in the formation of these mosaics. Most evidence to date suggests that homotypic constraints within a type of neuron are dominant, and that heterotypic interactions between different types of neuron are rare. In an analysis of macaqu...

Definition. Let G and H be groups. Their direct product is the group G×H defined as follows. As a set G×H = {(g, h) : g ∈ G, h ∈ H} is just the usual Cartesian product of G and H (the set of ordered pairs where the first component lies in G and the second component lies in H). The group operation on G×H is defined by the formula (g1, h1)(g2, h2) = (g1g2, h1h2) for all g1, g2 ∈ G and h1, h2 ∈ H....

Hemodynamic responses to histamine were investigated in the anesthetized rabbit. Intravenous injections of histamine induced dose-dependent decreases in systemic arterial pressure that were blocked by the H1-receptor antagonist pyrilamine but not the H2 antagonist cimetidine. Injections of histamine and the H1 agonist 6-[2-(4-imidazolyl)ethylamine]- N-(4-trifuormethylphenyl)-heptanecardoxamide ...

The multiple point principle (MPP) can be used to suppress non–diagonal flavour transitions and CP violation in the two Higgs doublet extension of the standard model. We discuss the quasi–fixed point scenario in the MPP inspired two Higgs doublet model which leads to the enhanced production of Higgs particles at the LHC if the MPP scale Λ ≃ 10− 100TeV. 1. Multiple point principle and custodial ...

Histamine membrane receptors are defined as either H1 (blocked by diphenhydramine-like antagonists) or H2 (blocked by cimetidine-like agents). We now report the solubilization, separation, and partial characterization of specific H1 and H2 membrane receptors from calf thymocytes. Membrane fragments were incubated with [3H]histamine either alone or with unlabeled histamine, diphenhydramine, or c...

Three forms of light-harvesting chlorophyll a/b-protein complexes of photosystem II (LHC II) were isolated from the thylakoid membranes of Dunaliella salina grown under different irradiance conditions. Cells grown under a low intensity light condition (80 micromol quanta m(-2) s(-1)) contained one form of LHC II, LHC-L. Two other forms of LHC II, LHC-H1 and LHC-H2, were separated from the cells...

کچ هدي پ شي مز هني فده و : شزومآ لاب يني شخب ساسا ي شزومآ مهم و راتسرپ ي تسا . و هنوگ ره دوج لکشم ي شزومآ رد لاب يني ، آراک يي هدزاب و ا ني شزومآ زا شخب راچد ار لکشم م ي دنک . فده اب رضاح شهوژپ سررب ي لماوع سرتسا از ي شزومآ لاب يني رد وجشناد ناي راتسرپ ي هدکشناد راتسرپ ي و يامام ي ماـجنا داـبآ مرـخ تسا هتفرگ . شور و داوم راک : رضاح هعلاطم کي هعلاطم صوت يفي عطقم ي تسا . د...

كچ ي هد فده و هقباس : هاگشناد تلاسر و مسج تملاس ءاقترا و نيصصختم تيبرت اه يم هعماج ناور دشاب . تسد يارب يباـي تلاسر نيا هب و دمآراك ،ملاس ،قيلا يناصصختم دنناوتب ات ،دنشاب ملاس دياب دوخ نانكراك ،لااو هعماج هب تبسن لوئسم دنيامن تيبرت . نيا زا تيولوا زا نانآ يناور تملاس تيعضو يسررب ور يم يتاقيقحت ياه دشاب . نيـيعت فده اب حرط نيا نا نانمس يكشزپ مولع هاگشناد نانكراك يناور تملاس تيعضو ديدرگ ماج ....

The protective properties of monoclonal antibody (MoAb) C179 directed to the stem region of haemagglutinin (HA) H2 that possessed fusion-inhibition and unique broad cross-neutralizing activities were examined in a mouse model. The MoAb efficiently protected mice against a lethal challenge with pneumovirulent human (H1) and avian (H2) strains of influenza A virus. Survival rates in mice that rec...

Effects of histamine (HA) on cyclic AMP production and its action upon the effects evoked by vasoactive intestinal peptide (VIP) were studied in the chick hypothalamus. HA (0.1-1000 microM) potently stimulated cyclic AMP formation in the hypothalamic slices, reaching maximal effect (2.5-3.5-fold increase) at a 100 microM concentration, and displaying an EC50 value of approximately 6.5 microM/ T...