نتایج جستجو برای: cinamic and vanilic acid)
تعداد نتایج: 16938690 فیلتر نتایج به سال:
in this research, the quality indices, phenolic compounds (hydroxy tyrosol, tyrosol, cinamic and vanilic acid), fatty acids and pigments from olive oil of cultivars ‘zard’, ‘roghani’, and ‘mari’ (from kazeroon region, located in fars province), were assessed. measurement of phenolic compounds showed that ‘mari’ cultivar oil contained the highest cinamic and vanilic acids with 1.4 and 1.18 milli...
Over the past decade, the chemical behavior of flavonoids as antioxidants has become the subject ofintense experimental research. In this paper, we use a quantum-chemical approach to shed light on thereactivity of four poly phenols, Benzoic acid, vanilic acid, gallic acid and flavone . In order to establishthe most efficient theoretical methodology, different methods, either Hartree—Fock-based ...
over the past decade, the chemical behavior of flavonoids as antioxidants has become the subject ofintense experimental research. in this paper, we use a quantum-chemical approach to shed light on thereactivity of four poly phenols, benzoic acid, vanilic acid, gallic acid and flavone . in order to establishthe most efficient theoretical methodology, different methods, either hartree—fock-based ...
Vanilic Acid Article 2200431 by Markus Stöckl, Siegfried R. Waldvogel, and co-workers demonstrates a new method how to obtain selectively vanillic acid, flavouring agent antioxidant, from side-stream lignins degradation using electrochemically generated ferrate as oxidizer. In times of climate changes the utilization relevant bio-based lignin renewable feedstock for fine chemicals is considered...
Screening of phenolic constituents in leaves of Cedrela serrata, Toona ciliata, Azadirachta indica and Melia azedarach was done by reversed phase high performance liquid chromatography (RP-HPLC). The phenolic compounds were identified by comparison with authentic standards. The phenolic acids identified in all plants leaves extract were gallic acid, protocatechuic acid, p-hydroxy benzoic acid, ...
introduction acetic acid bacteria are large group of obligate aerobic gram negative bacteria with the ability to oxidize ethanol to acetic acid (1). they are widely distributed in natural habitats and classified in family acetobacteraceae. members of this family are useful in industrial production of vinegar(2). acetic acid bacteria (aab) can use substrates as glucose, ethanol, lactate or glyc...
abstract previous researches have shown success of growth hormones usage on flower production increase, pod and prevention of abscission of them in some of the pulses. two tests were done, in order to find out the effects of growth hormones to on flower production increase, pod and chick pea yield composites in farmer conditions (2010-11) and green house conditions as factorial on the proje...
a novel acrylic acid-functionalized fe3o4 magnetic nanoparticle with a core-shell structure was developed for utilization as a heterogeneous organosuperacid in chemical transformations. the structural, surface, and magnetic characteristics of the nanosized catalyst were investigated by various techniques such as transmission electron microscopy (tem), thermogravimetric analysis (tga), and ft-ir...
abstract the cr(iii) and zn(ii) complexes with 2-((9,10-dihydro-1-hydroxy-9,10-dioxaanthracen-4-yloxy)carbonyl)benzoic acid as ligand have been prepared by reacting cr(no3) and zn(no3)2 and ligand in cloroform. the cr and zn complexes with 2-((9,10-dihydro-1-hydroxy-9,10-dioxaanthracen-4-yloxy)carbonyl) were also prepared in chloroform and aceton solutions. the uv-visible and ft-ir spectra of...
a simple, sensitive and selective method for solvent extraction and spectrophotemetric determination of lanthanum (ii) europium (iii), and cerium (iii) is described , the rare earth metals are extracted into chloroform solution of n-phenylbenzohydroxamic acid (pbha) at ph 9-10 various parameters are studied to optimize the extraction conditions. the molar absorptivity is found to increase from ...
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