نتایج جستجو برای: application of heavy metal element arsenic however adversely effect on safflower plants but until to 30 mg arsenic per kg of soil
تعداد نتایج: 23060443 فیلتر نتایج به سال:
in plants, animals, and humans (Fowler, 1983). Remediation of arsenic-contaminated soils has thus become a Ladder brake (Pteris vittata L.) is a newly discovered arsenic major environmental issue. hyperaccumulator. No information is available about arsenic effects on ladder brake. This study determined the effects of different arsenic Current remediation methods for arsenic-contamiconcentration...
introduction high concentrations of metals are usually encountered in surface soil and vegetation in areas affected by mining activity (liu et al., 2006). different distribution of elements in chemical fractions result in different bioavailability; therefore knowledge of the total content of an element in soil is not a sufficient criterion to estimate the environmental implications of trace met...
in this thesis a calibration transfer method is used to achieve bilinearity for augmented first order kinetic data. first, the proposed method is investigated using simulated data and next the concept is applied to experimental data. the experimental data consists of spectroscopic monitoring of the first order degradation reaction of carbaryl. this component is used for control of pests in frui...
Arsenic is considered as one of the most important environmental contaminant compound. Some plant species can grow in arsenic contaminated soil and they are able to reduce arsenic toxicity. Nowadays, phytoremediation as a new and friendly environmental technique employs the use of plants to remediate contaminated soil. Previous studies showed that Isatis cappadocica is an arsenic hyperaccumulat...
the present paper deals with criminal issues. for example, legal injunction on the necessity of returning a deposit has a legal nature and legal injunction on the punishment of those who breach the trust has a criminal nature. existing social issues are the basis of classification of some instances into the issue, some of which are based on variation and others on quality. therefore, the motiva...
educational researchers have provided evidence that teachers’ emotional intelligence has strong effects on various aspects of teaching and learning. yet, in the field of teaching english to speakers of other languages (tesol), inquiry into teachers’ emotional intelligence is nearly limited. given its documented powerful impact on teaching practices and student learning, it is critical to pursue...
this study investigated the effects of planning on second-language written production with regard to task type. the participants were 75 iranian learners of english as a foreign language attending a private foreign language institution. they were asked to complete two different types of writing tasks (expository writing task and argumentative writing task) in different planned conditions (indiv...
rested on sociocultural theory (sct), this study attempted to examine the effect of written corrective feedback (wcf) followed by producing written languaging on developing writing accuracy over new tasks. to this aim, two intact iranian efl classes at the low-intermediate level were randomly assigned to two experimental groups: direct (n = 25) and indirect (n = 25). both groups wrote on a numb...
At present, soil arsenic contamination is one of the prominent environmental problems. The concentration in honeysuckle exceeds standard levels, thus affecting quality traditional Chinese medicine. In this study, hydroponic method was employed to explore effect organic (dimethyl arsenic) and trivalent inorganic (NaAsO2) on growth plants. study demonstrated that low concentrations (10–20 mg/L) 1...
on- the-job training on of the most effective tools for managers to cope with the changing organizational environment. it grantess suitable services to customers, particularly in public service enterprises. if such training os goal oriented, planned systematically, and tailored to the employees, job content, then not only it could increase employees and organizational performance, but also it c...
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