نتایج جستجو برای: cd in dehkhair
تعداد نتایج: 16983638 فیلتر نتایج به سال:
Cadmium is a toxic element in plant nutrition and is considered as a contaminant of food and feed. A greenhouse experiment was carried out to examine the effects of combined application of cadmium and zinc on responses of wheat on a clay loam soil texture. This experiment was designed in a factorial experiment with randomized complete block design (RCBD) and four replicates per treatment. Three...
To study the effects of potassium (K) and zinc (Zn) with cadmium (Cd) in roots, stem, leaves and fruits of tomato plants, a greenhouse experiment was conducted as factorial based on complete random blocks design. The first factor was Zn at three levels (88.8, 177.6 and 355.2 μg/L) and the second factor was K at three levels (255, 510 and 1020 mg/L). In this experiment, the basic nutrition solut...
Siderophores are low molecular weight iron-binding ligands produced by aerobic soil microorganisms and some plants roots. They may also develop complexes with other metals such as Cd, thereby influencing the bio-availability, toxicity and mobility of Cd in the soils and aqueous environments. The main objective of this study was to investigate the effects of desferal siderophore (DFOB) on the ad...
Background and Objective: Present study aimed to investigate response of metallothionein (MT) in oyster Crassostrea sp. to the experimental concentrations of Hg and Cd in order to assess the possibility of MT usage as a biomarker of Hg and Cd contamination in this mollusk. Materials and Methods: Oysters were collected from docks of Imam Khomeini Port. After seven days acclimation period in labo...
This paper introduces Quantian, a scientific computing environment. Quantian is directly bootable from cdrom, self-configuring without user intervention, and comprises hundreds of applications, including a significant number of programs that are of immediate interest to quantitative researchers.
Interactions between Cd, pillared clays and chalcogenedies have been studied using nanomineralogical experiments. XRD, DSC and chemical analysis. The synchrotron-based X-ray absorption spectroscopy (XAS) was applied to characterize the reaction phases. The mean bond lengths between, Cd-S, Fe-S, Sb-S, Cd-Cd (in chalcogenedies), Al-Cd, Cd-Ti, and Fe-Cd, (in pillared clays) were determined by XAS ...
Background and Purpose: The Phytoremediation efficiency of heavy metals is one of the important points in environmental studies. This research was conducted to investigate the effect of cow manure, elemental sulfur, and EDTA on Cd uptake by Indian mustard in a Cd-polluted soil in the presence of Thiobacillus thiooxidans. Materials and Methods: Treatments consisted of applying cow manure (0, 5,...
in order to investigate the effect of cd and zn on uptake, concentration and the translocation factor of the cd and zn in the rice plant, a factorial experiment was conducted with four factors including two rice cultivars of vandana and hashemi, two waterlogged and non-waterlogged conditions and three levels of zn and cd (0, 5 and 10 mg kg-1 soil). the experiment was carried out in a randomized...
A surgical technique for the placement of titanium screw-type implants (Brånemark system) in the pterygomaxillary-pyramidal region is presented. The correct direction, location, and length of the implant is decided during surgery. Cylindric osteotomes are used as bone-site formers, thus minimizing the use of drills in bone preparation. This not only conserves bone, but greatly reduces the poten...
The maximum cantilever length-anterior-posterior spread (CL-AP) ratio is often used as an indication of the ability to cantilever in completely implant-supported prostheses. The CL-AP ratios were determined assuming that failure occurs when the prosthesis retaining screw-prosthesis joint was compromised by either compressive (exceeding the pretorque value) or tensile (opening of the joint via p...
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