نتایج جستجو برای: 10 and 15 mg l
تعداد نتایج: 17122881 فیلتر نتایج به سال:
the aim of this paper is eliminating cr(vi) by natural hap. hap is a inexpensive material which is used from bovine critical bone ash in order to remove heavy metal ions like cr(vi). some experiments in different ph are performed (ph=2,3,7). maximum adsorption was appeared at ph=2, dosage=0.3 gr, c0=10 mg/l. cr(vi) removal depends on ph value and initial amount of cr(vi) result of experiments w...
استرس سرما یکی از مهم ترین استرس های غیرزیستی است که اثرات مخربی در گیاهان بر جای می گذارد و در نتیجه کشاورزی را با مخاطره مواجه می سازد. گیاه گوجه فرنگی (lycopercicon esculentum) یکی از مهم ترین محصولات کشاورزی است که در مقایسه با بسیاری از گونه های گیاهی دیگر، حساسیت بالایی به دماهای پایین (کمتر از 12 درجه سانتی گراد) دارد و در این دما ها صدمات قابل توجهی به آن وارد می شود. در این تحقیق، بررس...
رشد و نمو سوخ سوسن دورگه شرقی رقم ‘arabian red’ از زمان فلس¬برداری و تولید سوخک فلسی تا تولید سوخ گل مورد بررسی قرار گرفت. بررسی رشد و نمو سوخ در سه آزمایش جداگانه انجام شد. آزمایش اول به بررسی مدت زمان انبارداری فلس بر رشد و نمو سوخک فلسی و محتوی قند سوخک فلسی پرداخت و مشخص شد افزایش دوره انبارداری از 3 به 5 ماه باعث افزایش اندازه سوخک فلسی به میزان 40/4 درصد و محتوی قندهای ساکارز (84/49 درصد)...
In order to study the effect of salicylic acid (SA) and humic acid (HA) on vegetative properties and quantitative and qualitative characteristics of tomato cv. Goldi, a factorial experiment based on randomized complete blocks design with three replications was conducted in a commercial greenhouse in Yasouj, Iran. The first factor was SA at four concentrations (0, 300, 600 and 900 mg/L) and the ...
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...
Efficacy of three different concentrations (5, 10 and 15 mg/ml) of dry flower powder of E. splendens and L. nepetaefolia was tested on the growth of aflatoxin-producing toxigenic strains of fungi A. flavus (NCBT 101) and A. parasiticus (NCBT 128) in Sabouraud dextrose agar medium (SDA). Maximum (75%) inhibition of growth of A. flavus was seen at 15 mg/ml concentration of E. splendens flower dry...
Due to the many restrictions on the use of soil and water resources, increasing greenhouse plants’ yield is important. In order to study the effect of humic acid (HA) on some growth and physiological traits of strawberry (Fragaria ananassa var: Selva), an experiment was conducted as a completely randomized design with factorial arrangement with three replications. The experimental factors...
in order to study the effect of pre and postharvest polyamines spraying on increasing vase life of alstroemeria (alstroemeriaaurantica cv.sukari), an experimental was conducted on completely randomized factorial design with two types polyamines (putrescine, spermine) in four levels (zero, five, 10, 15 and 20 mg/l). results showed that, 20 mg/l of putrescine and spermine treatments increased vas...
Nutrients especially nitrate and phosphate are the main limiting factors of algal growth in aquatic ecosystems. The present study was conducted to examine the effects of different concentrations of nitrate and phosphate simultaneously on growth of macro algae, Ulva rigida. For this purpose, algae were fed various concentrations of nitrate and phosphate during 28 days in 300 L tanks in the form ...
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