نتایج جستجو برای: different acids such as sulfuric
تعداد نتایج: 6805291 فیلتر نتایج به سال:
Hydrocarbostyril, which is a key intermediate in our new synthetic route to 6-nitroquipazine, can be prepared from 1-indanone oxime by Beckmann rearrangement. We have optimized the reaction by using a Lewis acid, aluminum chloride, in the yield of 91% instead of common acids such as polyphosphoric acid, and sulfuric acid used in conventional Beckmann rearrangement (20% in the literature, 10% in...
background: the modern dairy cows, due to intensive selection for higher milk production during past decades, have become more resistant to insulin. accompanied with dmi depression in per parturient dairy cow, insulin resistance may lead to a massive release of non-esterified fatty acids (nefa) to bloodstream which might act as a start point for development of other diseases. objectives: the pu...
In a previous report a specific color reaction of hexuronic acids with carbazole and sulfuric acid was described (1). In this reaction glucuronic and galacturonic acids, in free as well as in combined form in polyuronides, reacted with almost equal intensity. By decreasing the concentration of the acid and the temperature and time of heating, a modification of the carbazole reaction was obtaine...
A process for the valorization of seagrass residues has been developed, aiming to investigate its potential as a phosphate adsorbent and production added-value products, which can be assessed in agricultural applications. Posidonia oceanica were thermally treated (500 °C, 1 h) tested an from real wastewater. Chemical leaching experiments dewatered anaerobic sludge (DWAS) conducted, evaluating s...
The corrosion definition is not constrained to alloy and metals, but rather the term, corrosion, can likewise be stretched out to earthenware production and other nonmetallic materials. Corrosion can prompt to problems significant in furthest fields for man-factory [1]. Corrosion gets to be distinctly a standout amongst the most difficult points for researchers and the society for building. Fro...
The possibility of using a steel plant by-product (converter sludge) as an iron fertilizer was investigated. This compound consists of 64% Fe oxides. Considerable amounts of elements such as Ca, Si, Mn, P, and K are also present in the sludge. To study the converter sludge, an incubation experiment was carried out on three calcareous soils. Treatments were 0, 4, and 8 percent of converter sludg...
abstract the problems caused by the traditional system of criminal justice (which are based on remuneration and rehabilitation) such as, lack of attention to victim’s rights and position and society, underlie the emergence of restorative justice which had the victim-centered perspective, with respect to the role of the offender and participation of civil society. meanwhile, criminal mediation ...
this thesis attempts to measure learning styles, self efficacy and intrinsic motivation as predictors of iranian ielts reading comprehension. in order to address this issue, a quantitative study was conducted on some randomly selected intact students at ferdowsi university. these two groups were assigned as they were undergraduate (ba=91) and graduate (ma =74) students; they were all aged betwe...
In a previous report a specific color reaction of hexuronic acids with carbazole and sulfuric acid was described (1). In this reaction glucuronic and galacturonic acids, in free as well as in combined form in polyuronides, reacted with almost equal intensity. By decreasing the concentration of the acid and the temperature and time of heating, a modification of the carbazole reaction was obtaine...
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