نتایج جستجو برای: ph 1869 and l 4 cm
تعداد نتایج: 17158910 فیلتر نتایج به سال:
Polyethylene glycol (PEG) conjugation technology has been successfully applied to improve the performance of protein drugs. In this study, L-asparaginase was N-terminal site-specifically modified by alkylating PEG with monomethoxy polyethylene glycol-propionaldehyde (mPEG-ALD20000). The optimum reaction parameters were determined as pH 5.0, a molar ratio of mPEG-ALD2000 to L-asparaginase of 10:...
Population structure, growth, length-weight relationship and reproduction characteristics of leaping grey mullet (Liza saliens (Risso, 1810) were investigated in Beymelek Lagoon from February 2006 to January 2007. During the study, a total of 1248 leaping grey mullet were captured by gill- and trammel nets of various mesh sizes. Male to female ratio for leaping grey mullet population in Beymel...
in this study, a simple, rapid and selective method was developed for the determination of dexamethasone. the proposed method is based on inhibitory effect of dexamethasone on the oxidation of orange-g by bromate in sulfuric acid media. the reaction was followed spectrophotometrically at 478.5 nm (?max). under optimum experimental conditions, (72.6 ?mol l-1 of orange-g, 0.76 mol l-1 of h2so4, 0...
Background and purpose: Chlorophenol compounds are refractory and toxic contaminants that enter the environment as a result of industrial activities. They can contaminate water sources through leaking into the groundwater or being washed out from polluted soil. The aim of the present study was to evaluate the rate of 4-Chlorophenol (4-CP) degradation using the UV/NaPS process. Materials and ...
Soil salinity and alkalinity adversely affects the productivity and grain quality of rice. The grain quality of 19 rice genotypes characterized as salt tolerant (T), semi-tolerant (ST) and sensitive (S) was assessed in lysimeters containing saline and highly alkaline soils. Head rice recovery was reduced by salinity stress whereas it was not affected by alkalinity stress. The ratio of length to...
RATIONALE The hemodynamic effects of adaptive servoventilation (ASV) in patients with pulmonary hypertension (PH) are unknown. METHODS A series of clinically stable patients with pre- or post-capillary PH underwent ASV therapy (endexpiratory positive airway pressure support 12-14 cm H2O, pressure support 4-10 cm H2O) during right heart catheterization. Hemodynamics were measured at rest, at t...
در پژوهش حاضر، تنوع گونه‌ای زنبورهای خانواده‌‌ی Ichneumonidae در برخی مناطق استان تهران مورد مطالعه قرار گرفت. براساس نتایج حاصل، هفده گونه زنبور از هشت زیرخانواده Anomaloninae Viereck, 1918 ، Banchinae Wesmael, 1845، Campopleginae Förster, 1869 ، </str...
in order to optimize the micropropagation of qare-qat (vaccinium arctostaphylus j.j.sm), samples were collected from two regions of iran (asalem and kelardasht). anderson (an) media containing different concentrations of zeatin (0, 0.5, 1, 2 and 4 mg l-1) and different levels of ph (4.5, 5 and 5.5) were compared. the in vitro shoots were transferred on an media supplemented with zeatin (1 and 2...
Liposome permeability to net proton-hydroxide flux was compared under two conditions that have produced extreme values in previous studies. In the first [Nichols, J.W. & Deamer, D.W. (1980) Proc. Natl. Acad. Sci. USA 77, 2038-2042] small pH gradients were permitted to decay near pH 7 and permeability coefficients in the range of 10(-4) cm/sec were obtained. In the second [Nozaki, Y. & Tanford, ...
Population structure, growth, length-weight relationship and reproduction characteristics of leaping grey mullet (Liza saliens (Risso, 1810) were investigated in Beymelek Lagoon from February 2006 to January 2007. During the study, a total of 1248 leaping grey mullet were captured by gill- and trammel nets of various mesh sizes. Male to female ratio for leaping grey mullet population in Beymel...
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