نتایج جستجو برای: mg and damaging factors hco3
تعداد نتایج: 16954208 فیلتر نتایج به سال:
in the past couple of decades sociocultural theory of sla and its implications in efl contexts have attracted attentions of research circles worldwide and aroused some controversies. firth and wagner (1997) have questioned the principles of the cognitive view which gives importance to mental constructs in favor of sociocultural view which highlights social and contextual constructs. but if soci...
abstract deviation or in other words committing a crime is literally a social problem. this research that was conducted in 1389 and 1390 has tried to investigate the causes of crimes committed by young male inmates qazvin central prison and effective variables on their tendency to deviation. accordingly after collecting theoretical framework and offering theoretical model including both hirsch...
for any educational program to be successful, many factors work hand in hand. based on pervious efl studies, teachers and learners are the keys to gain achievement. granted the fact that explicit and implicit practice plays a key role in education, knowledge of it can help teachers facilitate students’ vocabulary learning. this study investigated to determine the contribution of explicit and i...
Thirty groundwater samples were taken from Assiut’s northern outskirts. The physicochemical properties of these investigated. For the evaluation water–rock interaction, saturation index (SI), chloro-alkaline indices (CAI1 and CAI2), Gibbs ratios for cations anions (GC GA), principal component analysis (PCA), hierarchical cluster (HCA) used. (1) With exception five that supersaturated, rest unde...
1- in a search directed to the reaction of compound)23(the cycloaddition reaction of 1,3- diphenylisobenzofurane)14(with p-benzoquinone)19(,followed by addition of cyclopentadiene was carried out.the specific spacial stracture of its ir,nmr,mass spectra. 2- in another attempt the kinetic stability and behavior of compounds)20(and)23(was studied.the main subject of this study was the highly reve...
Hydrogeochemical Assessment of Groundwater of Taluka Chachro, Thar Parker, district, Sindh, Pakistan
The study was conducted to evaluate the hydrogeochemistry of groundwater. Twenty-six groundwater samples were analysed for quality Chachro Taluka. EC and TDS contents in most water above WHO (2011) recommended limits. Almost all collected from dugwells located area have elevated concentrations Na Cl exceeding guidelines. Results Ca, Mg show that 92% 96% within prescribed limit respectively. Whe...
This paper presents the results of complex hydro-geochemical studies natural waters Kastropol tract. It was found that studied are characterized mainly by HCO3 Ca and Mg-Ca composition with a total mineralization value varying in range from 220 to 2306 mg/dm3 silicon content 0.78 6.08 . revealed geochemical parameters medium vary reducing oxidizing Eh -146.6 – +275.9 mV, pH 7.4 8.5 O2 1.80 7.73...
supervisors play an undeniable role in training teachers, before starting their professional experience by preparing them, at the initial years of their teaching by checking their work within the proper framework, and later on during their teaching by assessing their progress. but surprisingly, exploring their attributes, professional demands, and qualifications has remained a neglected theme i...
the skill of reading in english as a foreign language is an important and challenging one which is affected both by linguistic and extra linguistic factors. since vocabularies are part and parcel of every reading comprehension text, knowing enough vocabulary always facilitates this process. however, guessing strategy as one of the most important strategies has consistently ignored by language l...
abstract the results of an integrated study aimed at restoring water quality in a large watershed including seven catchments in north east iran are presented in this paper. this case study demonstrates how landscape metrics reflect direct or surrogate causes of the land use practices that are the determinants of water quality parameters. water quality factors included ec, ph, cl-1, hco3-1, so4-...
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