The use of phytochemicals in control of human diseases have been considerable public and scientific interest in current days. Syringic acid (SA), a phenolic compound often found in fruits and vegetables and which is synthesized via shikimic acid pathway in plants. It shows a wide range of therap...
Prephenic dehydrogenase, a soluble enzyme from E. coli, catalyzes an aromatization reaction which converts prephenic acid (PPA) to p-hydroxyphenylpyruvic acid (HPP) with DPN as the oxidant. The absence of this reaction in tyrosine auxotrophs indicates that it is an obligatory step in tyrosine bi...
Calorimetric enthalpies of reaction have been measured for the following enzyme-catalysed reactions at the temperature 298.15 K:prephenate(aq) = phenylpyruvate(aq) + carbon dioxide(aq),prephenate(aq) + NADox(aq) +H2O(l)= 4-hydroxyphenylpyruvate(aq) +NADred(aq) + carbondioxide(aq).Here, NADoxand ...
Publisher SummaryThis chapter describes the preparation of prephenic acid. In Escherichia coli and in Salmonella, chorismic acid is converted to phenylpyruvate and to 4-hydroxyphenylpyruvate, respectively, by bifunctional enzymes that catalyze as a first step, the rearrangement of chorismate to ...
1.1. Preparation of a triple mutant of Neurospora crassa is described.2.2. Culture filtrates of this mutant contain prephenic acid. The latter has been isolated as a crystalline barium salt.3.3. Some chemical characteristics of prephenic acid are noted.
β-Cyclodextrin-grafted citrate was used for the first time as a stabilizer and reducer to prepare silver nanoparticles (AgNPs). The as-synthesized AgNPs were further characterized by UV–vis absorption spectroscopy, powder X-ray diffraction spectroscopy, and transmission electron microscopy. Th...
Caffeine citrate is one of the most prescribed drug in the present day NICU for apnea. Its efficacy, tolerability, wide therapeutic index and safety margin has made it the drug of choice among the methylxanthines. Its therapeutic uses in apnea of prematurity, mechanical ventilation, bronchopulmo...
In this work a new method for the determination of sildenafil citrate on integrated three-electrode screen-printed sensor with carbon working and auxiliary electrodes and a silver reference electrode (SPCE) was developed. Differential-pulse voltammetric measurements were carried out in 0.15 mol ...
Assembly of anisotropic nanoparticles which need well controlling of assembly direction and spatial arrangement is more interesting than one-dimensional nanoparticles assemblies. As confirmed by observing of transmission electron microscopy images and analysis of plasmon resonance spectrum trans...
Antimicrobial activity of silver nanoparticles, which were synthesized by tri-sodium citrate assisted chemical approach, was evaluated. Chemical approach used for the synthesis of silver nanoparticles it was based on diminishment of silver nitrate in nearness of trisodium citrate without using a...
We used replicated paddy microcosm systems to estimate the tropic transfer of citrate-coated silver nanoparticles (AgNP citrate), polyvinylpyrrolidone (PVP)-coated AgNP (AgNP PVP), and silver ions (AgNO3) for 14 days under two exposure regimes (a single high-dose exposure; 60 μg L−1 and a seque...
1HypothesisCitrate functionalised gold nanoparticles (AuNPs) have been shown to be effective heavy metal sensors, as their optical spectra quantitatively shifts upon metal-citrate interaction. The speciation and molecular orientation of citrate molecules absorbed on the surfaces of bulk material...
This paper presents a simple, sensitive and reliable strategy for the colorimetric determination of coralyne (COR) using citrate-capped silver nanoparticles (Cit-AgNPs). In the presence of NaCl, COR induces the aggregation of Cit-AgNPs, resulting in a change of color from shinny yellow to pink. ...
Direct synthesis of silver conductive film on PET substrate by inkjet printing silver citrate conductive ink was presented in this paper. This kind of conductive ink contained silver citrate as silver precursor, 1,2-diaminopropane as complex agent dissolving the silver salt and methanol and isop...
Bi2O2CO3/BiOI heterojuncted photocatalysts were constructed through a facile partial anion exchange strategy starting from BiOI microspheres and urea with the assistance of sodium citrate. The content of Bi2O2CO3 in the catalysts was regulated by modulating the amount of urea as a precursor, whi...
In traditional sourdough fermentation recipes of artisan bakeries, often extra ingredients are added to the flour-water mixture. This may accentuate the aroma and taste of the baked products produced from such sourdoughs. This is made possible, for instance, by stimulating certain microbial acti...
PurposeTo determine the effect on strong ion difference of citrate as an anticoagulant during continuous veno-venous hemofiltration (CVVH).
High concentration of citrate exists in bone of humans and all osteo-vertebrates, and citrate incorporation imparts important biomechanical and other functional properties to bone. However, which cells are responsible for citrate production in bone remains unclear and whether the citrate compone...
Silver nanoparticles (Ag-NPs) and catechol are extensively used in various purposes for the benefits of human needs. Thus, functionalization of Ag-NPs with catechol is demanding for better prospects but a difficult task. In this paper, we have attempted to functionalize Ag-NPs indirectly and rep...
ABSTRACTNatural variations among milk constituents, and their relations to each other as well as to processing parameters, represent possibilities for differentiation of milk to produce high-quality natural products. In this study, we focused on natural variations in milk citrate and its interpl...
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