نتایج جستجو برای: 1 mm and twelve various zn concentrations 0 to 450 mg l

تعداد نتایج: 18889084  

Journal: :International journal for parasitology 2007
Cristina Gheorghiu Joanne Cable David J Marcogliese Marilyn E Scott

Recent reviews indicate that pollutants in the surrounding macroenvironment directly influence the population dynamics, distribution and dispersal of fish ectoparasites, often leading to increased parasitism. The aim of the current study was to explore the effects of sublethal concentrations of waterborne zinc (up to 240 microg Zn/L) on survival, reproduction and morphometrics of Gyrodactylus t...

The effects of three Arbuscular Mycorrhizal Fungi (AMF) species (Glomus versiforme, Claroideoglomus etunicatum and Rhizophagus intraradices) were studied on the growth parameters and nutrient uptake of three apple rootstocks (M.9, M.7 and MM.106). The soil medium contained a high level of calcium carbonate (38.65%). The results showed that AMF inoculation could increase almost all growth parame...

Journal: :international journal of environmental research 2014
s. moaref m.s. sekhavatjou a. hosseini alhashemi

dry and wet atmospheric depositions as well as urban surface soil samples were collected in eight different land use zones (during 2010) of the most important and largest industrial city, southwest iran for determining cadmium, chromium, lead and zinc. the average of cd, cr, pb and zn concentrations in the study area for wet precipitation were 17.8 μg/l, 49.97 μg/l, 2.31 μg/l, and 0.53 μg/l, re...

Journal: :علوم باغبانی ایران 0
قاسم اسماعیلی دانشجوی سابق کارشناسی ارشد، دانشکدة کشاورزی، دانشگاه فردوسی مشهد مجید عزیزی دانشیار، دانشکدة کشاورزی، دانشگاه فردوسی مشهد حسین آرویی استادیار، دانشکدة کشاورزی، دانشگاه فردوسی مشهد لیلا سمیعی استادیار پژوهشکدة علوم گیاهی، دانشگاه فردوسی مشهد

gavane-gaz-angubin (persian manna) belongs to astragalus genus (leguminosae). this plant is one of the most important species in iran for its medicinal value. considering the low propagation rate of this plant from seed and cutting, the feasibility of in-vitro propagation of this plant was investigated. effect of different types and concentrations of cytokinins such as bap, kin, and ze (0.5, 1,...

Journal: :international journal of environmental research 0
s. moaref department of environmental engineering, science and research branch, islamic azad university, khouzestan, iran m.s. sekhavatjou department of environmental engineering, science and research branch, islamic azad university, khouzestan, iran a. hosseini alhashemi department of environmental science, science and research branch, islamic azad university, khouzestan, iran

dry and wet atmospheric depositions as well as urban surface soil samples were collected in eight different land use zones (during 2010) of the most important and largest industrial city, southwest iran for determining cadmium, chromium, lead and zinc. the average of cd, cr, pb and zn concentrations in the study area for wet precipitation were 17.8 μg/l, 49.97 μg/l, 2.31 μg/l, and 0.53 μg/l, re...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه سیستان و بلوچستان - دانشکده مهندسی 1392

flow in natural river bends is a complex and turbulent phenomenon which affects the scour and sedimentations and causes an irregular bed topography on the bed. for the reason, the flow hydralics and the parameters which affect the flow to be studied and understand. in this study the effect of bed and wall roughness using the software fluent discussed in a sharp 90-degree flume bend with 40.3cm ...

2017
Maria J Poblaciones Paul Damon Zed Rengel

Zinc (Zn) is an important micronutrient that can alleviate cadmium (Cd) toxicity to plants and limit Cd entry into the food chain. However, little is known about the Zn-Cd interactions in pasture plants. We characterized the effects of foliar Zn application and Cd uptake by ryegrass (Lolium rigidum L.) and clover (Trifolium subterraneum L.) grown on Cd-contaminated soils; all combinations of fo...

2011
Danielle Sinnett Alice Holt platanoidis Schrank Tony R. Hutchings Mark E. Hodson

This study examines the food-chain transfer of Zn from two plant species, Urtica 31 dioica (stinging nettle) and Acer pseudoplatanus (sycamore maple), into their corresponding 32 aphid species, Microlophium carnosum and Drepanosiphum platanoidis. The plants were 33 grown in a hydroponic system using solutions with increasing concentrations of Zn from 0.017 34 to 42 mg Zn/l, although U. dioica o...

Dehghanifard, Emad, Kakavandi, Babak, Noorisepehr, Mohammad,

Background & Objective: The presence of nitrate and phosphate in concentrations above the allowable level in surface and groundwater resources leads to disease and problems. The aim of this study was to investigate the adsorption efficiency of magnetic-metallic chitosan nanocomposite in the adsorption of nitrate and phosphate from aqueous solutions. Materials and methods: The adsorbent was synt...

2002
Zlatimira Stoyanova Snejana Doncheva

The influence of succinate treatment on Zn toxicity was investigated using plant growth and mineral uptake as stress indicators. Pea plants (Pisum sativum L., cv. Citrine) were treated with various Zn concentrations (0.67 to 700 μM Zn) in the presence and absence of 0.2 mM Na-succinate. Plants pre-treated with succinate and then exposed to Zn exhibited higher dry root, stem and leaf weight than...

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