نتایج جستجو برای: 350 and 400
تعداد نتایج: 16840690 فیلتر نتایج به سال:
هدف: در این پژوهش اثر تنش شوری بر جوانه زنی بذر، آناتومی برگ و ساقه و پارامترهای رشد در گیاهان ده و شصت روزه گونه salsola arbuscula مورد بررسی قرار گرفت. مواد و روش ها: بذر گیاه sasola arbuscula در دو محیط wa (حاوی 0، 100، 200، 250 و300 میلیمولار سدیم کلراید) و ms (حاوی 0، 100، 200، 250، 275 و 300 میلیمولار سدیم کلراید)، در شرایط در شیشه کشت و به ترتیب گیاهان 10 و 60 روزه به منظور بررسی جوا...
به منظور بررسی تأثیر تراکم کاشت بر خصوصیات فیزیولوژیکی و مورفولوژیکی ارقام جو بهاره آزمایشی به صورت اسپلیت پلات در قالب طرح بلوکهای کامل تصادفی در سه تکرار در ایستگاه تحقیقات کشاورزی بروجرد در سال زراعی 1387-1388 اجرا شد. در این بررسی رقم به عنوان تیمار اصلی در دوسطح: محلی و نصرت و تراکم بوته درچهار سطح: (300) ، (350) ، (400) و (450 بذر در مترمربع) تیمار فرعی را تشکیل دادند. نتایج حاصل از تج...
The accuracy of the habitat simulation method is often questioned due to limited simulated elements and indicator species. This study established an environmental flow assessment by coupling fish with hydrological reference system. obtained through was corrected statistical characteristics natural regime. Huayuankou section in Lower Yellow River assessed. results show that demand 7.9 - 15.4 bil...
Using Fluorescence Spectrometer Lumina, fluorescence spectra of surface slices apples and potatoes were measured. Some the samples healthy, some infected: had scabs, rot mechanical damage. For apples, two zones found where emission healthy scab-affected differed significantly from each other. This is region 400–450 nm with excitation 300–350 nm, as well 680–750 nm. potatoes, differences between...
Healing of bones damaged by accidents or other factors can be done creating artificial bone structures scaffolds that initiate the growth tissue and help support so they function. The process making scaffold powder metallurgy sintering with magnesium material. purpose this study was to determine effect variations in temperature compaction pressure metallurgical on compressive strength microstru...
The aim of this study is to evaluate the method for compensation magnetic field interference from mains, which consists primarily components with a frequency 50 (60) Hz and its multiples. setup compensates interfering using three Helmholtz coils, sensors, digital processing unit, power amplifiers. unit implements an adaptive least-mean-square (LMS) algorithm calculate currents through coils tha...
The consequences of climate change on infrastructure, particularly reinforced concrete (RC) bridges, have rapidly increased in recent years. These are primarily driven by the surge CO2 emissions, which significantly impacts carbonation depth RC structures. This study aims to investigate probability carbonation-induced corrosion initiation (PCICI) bridge elements. To achieve this, investigation ...
A double catalytic layer scheme is proposed and investigated for the low temperature growth of carbon nanotubes (CNTs) over Co (Cobalt), Al (Aluminum), Ti (Titanium) catalysts on a silicon substrate. In this work, we demonstrate CNTs by thermal chemical vapor deposition (TCVD) process at both 350 °C 400 °C. Based scanning electron microscopy (SEM) Raman spectroscopy analyses, good quality demon...
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