Acidic hydrolysis
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This study aims to synthesize and characterize the formation of dihydroxystearic acid (DHSA) from the ring opening of epoxidized oleic acid. The optimal reaction parameters to produce DHSA were found using sulfuric acid as catalyst in which the maximum relative conversion was reached up to 86%. The detection of hydroxyl group was using Fourier Transform Infrared Spectroscopy.
6p dianmotminh02 03-05-2024 2 1 Download
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Ebook "Phospholipases in plant signaling" focuses on recent advances in the biochemical and molecular analysis of different families of phospholipases in plants and their roles in signaling plant growth, development and responses to abiotic and biotic cues. The hydrolysis of membrane lipids by phospholipases produces different classes of lipid mediators, including phosphatidic acid, diacylglycerol, lysophospholipids, free fatty acids and oxylipins.
232p cotieubac1004 15-03-2024 4 0 Download
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Ebook "Bio-inspired silicon-based materials" addresses a wide range of topics including, but not limited to, biotechnology, synthetic chemistry, polymer chemistry and materials chemistry. The book will serve as a specialized review of the field of biologically inspired silicon-based structures. Researchers studying biologically inspired silicon materials chemistry will find this volume invaluable.
132p nhanphanguyet 28-01-2024 7 2 Download
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Ebook "D-Xylitol: Fermentative production, application and commercialization" discusses the medical applications of D-xylose (diabetic patients, odontological, lipid metabolism disorders, renal and parenteral lesions, otitis media, lung infections, antimicrobial and anti-adherence activities, and osteoporosis) thus making it unique to graduate students and researchers in the medical community.
344p tachieuhoa 28-01-2024 2 2 Download
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Ebook "A study on catalytic conversion of non-food biomass into chemicals: Fusion of chemical sciences and engineering" is catalytic conversion of non-food, abundant, and renewable biomass such as cellulose and chitin to chemicals. In biorefinery, chemical transformation of polymers to valuable compounds has attracted worldwide interest for building sustainable societies. First, the current situation of this hot research area has been summarized well in the general introduction of the thesis, which helps readers to become familiar with this topic.
171p lamquandat 28-12-2023 2 2 Download
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In the present investigation, sea rough fish were hydrolyzed with alcalase/peptidase combined enzymes (EA/EP). Raw material proximate composition was investigated. The results indicated that sea rough fish was successfully converted into hydrolysates that mainly composed of small size peptides and free amino acids. The essential amino acid could be served as a valuable source of nutrition for humans and animals.
10p viannee 02-08-2023 3 3 Download
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In this study, CNC was isolated from used office papers by means of acid hydrolysis. For CNC/PEO fiber fabrication process, CNC was added to PEO aqueous solution to produce CNC/PEO fibers by electrospinning. In this process, several parameters were investigated, namely PEO concentration, CNC:PEO ratio, the applied voltage, and the distance between the tip and the collector on the morphology of electrospun CNC/PEO fibers.
6p viargus 03-03-2023 3 2 Download
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Sea cucumber innards (SCI) are the main waste of the sea cucumber processing industry. SCI protein hydrolysates were prepared using Papain and kinematic parameters of SCIPapain hydrolysis reaction were studied. The hydrolysates were subsequently analyzed for their antioxidant potential and amino acid composition for the first time.
11p vidudley 20-02-2023 9 2 Download
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The synthesis of natural products 2-(2,3-dibromo-4,5-dihydroxyphenyl)acetic acid (1) and 2-(2,6-dibromo-3,5- dihydroxyphenyl)acetic acid (2) and as well as their derivatives 25 and 26 were carried out by substitution, hydrolysis and demethylation reactions of the corresponding four benzyl bromides. The antioxidant potentials of benzylic acid-derived bromophenols were, for the first time, appraised by several outstanding bioanalytical methods.
23p lyhuyenthu 31-01-2023 8 2 Download
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Chitosan-sheath and -chitin-core nanowhiskers (CsNWs) have been successfully generated by surface deacetylation of chitin nanowhiskers (CtNWs) in the never-dried state. Acid hydrolysis (3N HCl, 30 mL/g, 104 ◦C) of pure chitin derived from crab shell yielded 65% 4–10 nm thick, 16 nm wide and 214 nm long chitin whiskers (CtNWs) that were 86% crystalline and 81% acetylated.
9p vihermione 06-01-2023 16 2 Download
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Cellulose nanowhiskers (CNW) from cotton, was prepared by acid hydrolysis and purified using a size selection process to obtain homogeneous samples with average particle size of 270 nm and 85.5% crystallinity. Purified CNW was used as precursor to carbon nanoneedles (CNN) synthesis.
7p vihermione 06-01-2023 12 2 Download
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Bacterial cellulose (BC)is a polymer with interesting physical properties owing to the regular and uniform structure ofitsnanofibers, whichare formedby amorphous (disordered) andcrystalline (ordered) regions.
7p vihermione 06-01-2023 10 3 Download
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This work aimed to produce and characterize cellulose nanofibers obtained from cassava peel with a combination of pre-treatments with acid hydrolysis or TEMPO-mediated oxidation and ultrasonic disintegration. All nanofibers presented nanometric diameter (5−16 nm) and high negative zeta potential values (around −30 mV).
9p viginny 30-12-2022 7 2 Download
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Arabinoxylans (AXs) display biological activities that depend on their chemical structures. To structurally characterize and distinguish AXs using a non-enzymatic approach, various TEMPO-oxidized AXs were partially acid-hydrolysed to obtain diagnostic oligosaccharides (OS).
11p viginny 30-12-2022 7 2 Download
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Many biomaterials for bone regeneration have recently been produced using thermally gelled curdlan (1,3-β-Dglucan) as a binder for bioceramics. As the human organism does not produce enzymes having the ability to degrade curdlan, it is not clear what is the fate of curdlan gel after its implantation in the bone.
12p viginny 30-12-2022 18 2 Download
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Hydrogels based on biopolymers like Gum Arabic (GA) usually show low applicability due to weak mechanical properties. To overcome this issue, (nano)fillers are utilized as reinforcing agents. Here, GA hydrogels were reinforced by chitin nanowhiskers (CtNWs, aspect ratio of 14) isolated from the biopolymer chitin through acid hydrolysis.
12p viginny 30-12-2022 9 2 Download
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The hydrolysis of germ rice by the use of α-amylase and glucoamylase enzymes will help increase the reducing sugar content, reduce viscosity, and improve the yield of milk solution compared to the traditional extraction method.
13p viporsche 03-11-2022 21 5 Download
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Glycosides of 4-nitrocatechol (1,2-dihydroxy 4-nitrobenzene) with α-D-glucopyranose and α-D-mannopyranose were synthesized by the glycosylation of phenol with peracetylated sugars in the presence of BF3·OBu2 . The glycoside of 4-nitrocatechol with β -D-galactopyranose was prepared by the glycosylation of this phenol as sodium phenoxide with tetra-O-benzoyl-α-D-galactopyranosyl bromide.
9p langthannam 29-12-2021 7 0 Download
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We derived a protein hydrolysate with rich content, which includes proteinogenic and nonproteinogenic amino acids, from chicken feathers by using an alkaline hydrolysis procedure with high yield success. After foliar application of aqueous solutions (0.05%, 0.075%, and 0.1%) of chicken feather protein hydrolysate (CFPH) to the seedlings of wheat (Triticum aestivum L. ‘Altındane’ and ‘Bezostaya’), their effects were evaluated on important physiological and biochemical parameters.
13p tudichquannguyet 29-11-2021 19 1 Download
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Dextran esters of different amino acids (glycine, β-alanine, L-ornithine, L-lysine) are investigated regarding their pKa values by potentiometric titration. The pKa values of the dextran derivatives are generally dependent on the position of the amino group in relation to the ester group, i.e. the nearer they are located in the molecule, the lower the resulting pKa values are, L-ornithine ester being the exception. An influence of the polymer backbone is ruled out.
12p tudichquannguyet 29-11-2021 8 0 Download