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Browsing Artigos by Title
Now showing items 147-166 of 378
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Fatty acids, carbohydrates and crude protein in twenty cassava cultivars(Manihot esculenta Crantz) (Journal of the American Oil Chemists’ Society, 1985-04)Twenty cassava cultivars (Manihot esculenta Crantz) were analyzed for fatty acids, nonstructural carbohydrates and crude protein contents. The main constituent fatty acids were myristic, palmitic, stearic, oleic, linoleic ...
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(Planta Daninha, 2009-11-13)The species Lantana camara, commonly used as ornamental, has spread worldwide becoming one of the world's most important weeds. To develop new methods of control of this plant, it is essential to distinguish it from other ...
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(Journal of Forensic Sciences, 2016-02-29)The illegal use of formalin (commercial formaldehyde) in cosmetic products harms the health of individuals exposed to this substance. Over the last years, the commercial availability of these products, especially those ...
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(Química Nova, 2009)The oxidation of arsenic (As(III) to As(V)) in water samples was performed by heterogeneous photocatalysis using a TiO2 film immobilized inside a photochemical reactor. After oxidation, As(V) was removed from the water ...
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(Renewable Energy, 2015-06)Brassica juncea is a drought-tolerant member of the Brassicaceae plant family with high oil content and a short growing season that is tolerant of low quality soils. It was investigated as a feedstock for production of ...
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(Talanta, 2009-09-04)A greener and more sensitive spectrophotometric procedure has been developed for the determination of phenol and o-cresol that exploits an aqueous two-phase system (ATPS) using a liquid–liquid extraction technique. An ATPS ...
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(Journal of Hazardous Materials, 2015-11-10)Recovery of mercury from effluents is fundamental for environmental preservation. A new, green method was developed for separation of mercury from effluent containing different metals. The extraction/separation of Hg(II) ...
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(Anais da Academia Brasileira de Ciências, 2018-08)Fe(II) and Fe(III) have distinct chemical and biological functions. Consequently, it is more important to determine the fraction of both oxidation state that knowing the total iron concentration in a sample. However, green ...
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(Ciência Rural, 2016-10)The essential oil plants contents can be affected by several factors. For example, in certain plants, collection time has been observed to affect the content and chemical composition of the essential oil obtained from the ...
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(Microchemical Journal, 2017-07)The aim of this work is to develop a method for determining trihalomethanes (THMs) in fish samples. The proposed method uses solid phase microextraction and gas chromatography with an electron capture detector. Factors ...
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(European Journal of Medicinal Chemistry, 2019-04-15)In this study, a series of C-28 amides derivatives of hederagenin with or without the presence of an acetyl group at positions 3 and 23 in ring A, were synthetized aiming to develop potent cytotoxic agents. Their structures ...
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(European Journal of Medicinal Chemistry, 2015-11-13)In this study, a series of novel C-28 esters and amides derivatives of hederagenin (He) were designed and synthesized in attempt to develop potent antitumor agents. Their structures were confirmed by MS, IR, 1H NMR and ...
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(Planta Daninha, 2010-11-15)Due to the large amount of pesticides applied in agriculture, mainly herbicides, there is a growing concern about a possible environmental contamination with these products, including water bodies. Given the above, the aim ...
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Highly potent anti-leishmanial derivatives of hederagenin, a triperpenoid from Sapindus saponaria L. (European Journal of Medicinal Chemistry, 2016-11-29)Leishmaniasis is a neglected tropical disease (NTDs), endemic in 88 countries that affect more than 12 million people. Current drugs are limited due to their toxicity, development of biological resistance, length of treatment ...
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(Catalysis Letters, 2012-02)Molecular sieves, complex organic bases and radical oxidants are commonly used in alcohols oxidation reactions. In this work, we have evaluated the beneficial effects of addition of K2CO3 to Pd(II)-catalyzed oxidation ...
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(Journal of Environmental Management, 2015-04-07)The new magnetic photocatalysts HT/TiO2/Fe and HT-DS/TiO2/Fe, modified with the anionic surfactant sodium dodecylsulfate (DS) were successfully synthesized in this work. Titanium dioxide (anatase) followed by iron oxide ...
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(Journal of Separation Science, 2004-12-15)Two insect colonies of Elasmopalpus lignosellus were reared in our laboratory, the first being initiated from pupae obtained from a cornfield in the region of Sete Lagoas, Minas Gerais and the second from a cornfield in ...
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(Química Nova, 2007-07)Based on a specially created mass spectral database utilizing 23 tetradecenyl and 22 hexadecenyl acetate standards along with Kóvats retention indices obtained on a very polar stationary phase [poly (biscyanopropyl siloxane)] ...
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(International Journal of Quantum Chemistry, 2012-05-15)A neural network procedure is applied to solve an ill-posed inverse problem in chemical kinetics relevant to chemical and biological areas; calculation of rate constants for the jack-bean urease denaturation by an anionic ...
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(Antarctic Science, 2010-07-02)This study concerned the fragility of maritime Antarctic soils under increasing temperature, using the C dynamics and structural characteristics of humic substances as indicators. Working with four representative soils ...
Now showing items 147-166 of 378
