نتایج جستجو برای: in situ reaction
تعداد نتایج: 17036897 فیلتر نتایج به سال:
Visible-light photocatalysis provides numerous useful methodologies for synthetic organic chemistry. However, the mechanisms of these reactions are often not fully understood. Common mechanistic experiments mainly aim to characterize excited state properties photocatalysts and their interaction with other species. Recently, in situ reaction monitoring using dedicated techniques was shown be wel...
abstract amino acids are building blocks of proteins, and play a vital role in living beings existence and their functionality. the interaction of these compounds with metal ions is of great importance to biochemists, and chemists, because their functions can be utilized as a model in understanding enzymes mechanism for transport of metal ions to tissues. among twenty essential amino acids w...
Internationally exploited lubricants are derived from coal and petroleum. Due to their high consumption and effects of their long-term pollution on the environment, it is imperative to use renewable and cheap feedstock for the synthesis of bio-based lubricants. This study presents the synthesis and optimization process of Ethylene Glycol (EG) based bio-lubricant from palm kernel oil. Palm Kerne...
Background: The excellent biocompatibility, biodegradability and biological properties of the hydrogels, fabricated using natural polymers, especially polysaccharides, are very advantageous for biomedical applications. Gum tragacanth (GT) is a heterogeneous highly branched anionic polysaccharide, which has been used extensively in food and pharmaceutical industries. Despite, its desirable prop...
In-situ synthesis of Ti-incorporated MCM-41 nano catalyst was carried out by the hydrothermal method to prepare a mesoporous catalyst for the oxidative desulfurization reaction (ODS). Oxidative reaction of dibenzothiophene (DBT) as a heavy sulfur compound was evaluated in a solution of n-decane as a model of liquid fuel. The synthesized catalysts were characterized by XRD, FESEM, EDX, TEM, FTIR...
abstract sensitive and precise voltammetric methods for the determination of trace amounts of furaldehydes, mainly as furfural (f) and 5-hydroxymethyl-2-furaldehyde (hmf), in waste waters and other matrices is described. determination of total furaldehyde at < ?g g-1 levels in alkaline buffered aqueous media was individually investigated. by the use of ordinary swv and adsorptive square wave ...
سلنیوم به عنوان یک عنصر ضروری، نقش ویژه ای در رژیم غذایی انسان دارد. مقدار مورد نیاز یا سمیت سلنیوم به غلظت و فرم شیمیایی این عنصر بستگی دارد. بنابراین گونه شناسی و اندازه گیری مقادیر بسیار جزئی سلنیوم در ماتریس های مختلف امر مهمی می باشد. در این مطالعه سه روش مختلف برای اندازه گیری سلنیوم(iv) پیشنهاد شده است.در روش اول الکترود لایه نشانی شده با فیلم بیسموت/جیوه، تحت شرایط مدار باز و تکنیک ولتا...
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