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ascorbicacid, etc ; biomass; esterification; green chemistry; Show all 4 Subjects
Abstract:
... We developed a novel pathway for preparing the high-value pharmaceutical intermediate 2-furylglyoxylic acid (2FGA) from 2-keto-l-gulonic acid (2KGA), a bio-based sugar-acid monomer and precursor of vitamin C, via dehydration. 100 g L⁻¹ methyl 2-keto-l-gulonicate (Me-2KGA) was transformed into methyl 2-furylglyoxylicate (Me-2FGA) with a maximum yield of 79.4%, competing with the yields obtained via ...
ascorbicacid, etc ; food chemistry; furfural; pH; temperature; Show all 5 Subjects
Abstract:
... The volatile products (VPs) formation from the self-degradation of l-ascorbic acid (ASA) in hot compressed water (HCW) was investigated with different reaction parameters, such as time, temperature, pH and ratio of ASA/water. The results showed that various reaction parameters had varying degrees of influence on the reaction, while the most significant effect factor was the initial pH of the solut ...
ascorbicacid, etc ; molecular weight; okra; pectins; temperature; viscosity; Show all 6 Subjects
Abstract:
... In this work, effects of ascorbic acid (AH₂) treatment on the viscosity and structural properties of okra pectic polysaccharide (OPP) and its mechanism were investigated. Results showed that AH₂ could decrease the apparent viscosity of OPP, and the reducing ability was promoted by high temperature and the addition of Fe²⁺, Cu²⁺ or H₂O₂. The molecular weight was significantly decreased with increas ...
ascorbicacid; ascorbicacid deficiency, etc ; antioxidants; cognition; cognitive disorders; cross-sectional studies; high performance liquid chromatography; prospective studies; regression analysis; synaptic transmission; Australia; Show all 11 Subjects
Abstract:
... Vitamin C is a powerful antioxidant and facilitates neurotransmission. This study explored association between vitamin C deficiency and cognitive impairment in older hospitalised patients. This prospective study recruited 160 patients ≥ 75 years admitted under a Geriatric Unit in Australia. Cognitive assessment was performed by use of the Mini-Mental-State-Examination (MMSE) and patients with MMSE ...
ascorbicacid, etc ; antioxidant activity; food quality; measurement; persimmons; phenols; Show all 6 Subjects
Abstract:
... The impact of drying on the nutritional compositions of products is one of the crucial issues restricting the advance of food quality, but there has been a lack of systematic research on the variation characteristics of nutritional components of persimmon during microwave drying. The objective of this work was to investigate the effects of microwave power, slice thickness and loading amount on the ...
ascorbicacid, etc ; food science; hypoxia; pineapples; weight loss; yeasts; Show all 6 Subjects
Abstract:
... The aim of this study was to investigate the competency of pre‐process anoxia treatment on physicochemical quality of fresh‐cut pineapples cv. ‘Phulae’ during storage. The fruits were kept in anoxia atmosphere (N₂) for 16 h before processing. The fruits were processed immediately after treatment (G1) and after storage at 13 °C for 6 days (G2). Anoxia treatment delayed the weight loss and had no ef ...
ascorbicacid, etc ; Arum maculatum; Cuculidae; ethnobotany; gastronomy; iron; soups; Show all 7 Subjects
Abstract:
... This study aimed to perform a nutritional analysis of cuckoo pint soup, a traditional dish made from cuckoo pint (Arum maculatum L.) that is a self-growing plant found in many countries including Turkey. Adopting an experimental research method this study included the preparation of the soup using traditional cooking technique. In addition to all raw ingredients used for making the cuckoo pint sou ...
ascorbicacid, etc ; creatinine; glucose; niacin; nicotinamide; pyridoxine; thiamin; water solubility; Show all 8 Subjects
Abstract:
... The effects of five water-soluble vitamins (thiamine, nicotinic acid, nicotinamide, pyridoxine, l-ascorbic acid) on the formation of MeIQx in a chemical model system containing glycine/glucose/creatinine were investigated. Thiamine was the most potential inhibitor among these five vitamins, which could reduce the formation of MeIQx by 33.9%–100.0%, depending on the concentration of thiamine. Furth ...
ascorbicacid, etc ; Escherichia coli; ambient temperature; biofilm; hydrogels; hydroxyproline; peptides; rheometry; Show all 8 Subjects
Abstract:
... Self assembling peptidebased hydrogel has been explored for delivering growth factors, anticancer drugs, antibiotics etc. Here, RADA 16-I (RADARADARADARADA), an ionic self complementary peptide that forms a well defined nanohydrogel has been studied for its ability to deliver PDGF-BB in a sustained manner and to destruct biofilm formed by wound specific pathogens. Results of the structural analysi ...
ascorbicacid, etc ; color; flavonoids; food chemistry; fungi; polyphenols; sodium metabisulfite; sulfites; Show all 8 Subjects
Abstract:
... In the present study, the color, total sugar, contents of soluble protein, total polyphenols, total flavonoids, and soluble vitamins, and other indicators of black fungus treated with sodium metabisulfite under different conditions were measured to evaluate the sensory and nutritional changes in black fungus after sulfite treatment. The results showed that use of sodium metabisulfite increased the ...
ascorbicacid, etc ; blood serum; cattle; chlortetracycline; detection limit; fluorescence; synthesis; tannins; Show all 8 Subjects
Abstract:
... In this paper, a simple and one-pot synthetic strategy was established to prepare copper nanoclusters by using tannic acid as the template and ascorbic acid as the reducing agent. The tannic acid-capped copper nanoclusters (Cu NCs@TA) displayed excitation and emission peaks around 365 and 435 nm with fluorescence quantum yield of 9.8%. Based on the inner filter effect and static quenching mechanis ...
ascorbicacid, etc ; Lycium; detection limit; fluorescence; food chemistry; lakes; sensors (equipment); Show all 7 Subjects
Abstract:
... A green and facile hydrothermal synthesis approach is proposed for the preparation of nitrogen-doped carbon quantum dots (N-CQDs) with wolfberry. These N-CQDs were developed as a highly sensitive fluorescent ‘on-off-on’ switch sensor for the sensing of Fe³⁺ and l-ascorbic acid (AA). The N-CQDs displayed superior fluorescence characteristics of CQDs with a quantum yield up to 22%. The N-CQDs were d ...
ascorbicacid, etc ; DNA methylation; color; ethylene; fruits; genomic islands; lycopene; melatonin; tomatoes; Show all 9 Subjects
Abstract:
... Melatonin (MT) as an evolutionarily highly conserved molecule plays an exceptional role in plants. In the present study, the regulation mechanism of the DNA methylation of CpG islands of ethylene signaling genes induced by MT on postharvest ripening of tomato fruit was studied. The ripening of tomato fruit was significantly promoted by the 0.5 mM MT treatment, as revealed by the appearance color, ...
ascorbicacid, etc ; antioxidant activity; biotechnology; cassava starch; gelatin; glycerol; industry; plasticizers; polymers; Show all 9 Subjects
Abstract:
... Sustainability has been an important issue in cosmetic industry, resulting in increasing concerns about environmental impacts, starting by the selection of raw materials. The aim of this work was the production of biopolymeric films based on a cassava starch and gelatin mixture (1:1) with the incorporation of natural antioxidants, such as vitamin C and catuaba extract aiming its future use as an e ...
ascorbicacid, etc ; alpha-tocopherol; antioxidant activity; apiaries; food chemistry; health promotion; pollution; Show all 7 Subjects
Abstract:
... The subject of the present research is the evaluation of health-promoting properties caused by the presence of some vitamins as well as the antioxidative potential of the honeybee drone brood homogenate (DBH). The study used 139 homogenate samples obtained from various apiaries and collected over 3 years, three times during each beekeeping season. Samples differed in terms of varroa infestation, s ...
ascorbicacid, etc ; Bombyx mori; DNA; RNA; dietary supplements; instars; silkworms; thermal stress; Show all 8 Subjects
Abstract:
... Dietary supplementation of ascorbic acid was found to be effective in modifying the composition of essential biomolecules. A relative investigation on effects of exogenous dietary supplementation of 0.2% ascorbic acid on the fifth instar larvae of silkworm, Bombyx mori exposed to a high thermal stress of range 40 ± 2 °C was carried out in the lab-set conditions. The observed elevation in various b ...
ascorbicacid, etc ; bioactive compounds; energy; food science; lycopene; temperature; tomato juice; ultrasonics; Show all 8 Subjects
Abstract:
... We investigated the simultaneous effects of temperature, ultrasound, and vacuum pressure in the tomato juice concentration process. To this end, a novel ultrasound-thermal concentrator under vacuum conditions was fabricated. The process was performed at three levels of ultrasound power (48, 84, and 120 W), three vacuum pressures (10, 20, and 30 kPa), and three temperatures (50, 60, and 70 °C). Als ...
ascorbicacid, etc ; Ononis spinosa; alpha-tocopherol; antioxidant activity; polyketides; research; spectral analysis; Jordan; Show all 8 Subjects
Abstract:
... The new cyclic polyketide 7,9,11-trihydroxytetracos-2-eneoic acid δ-lactone (1), together with other eleven known compounds, were isolated from Ononis spinosa, growing wildly in Jordan. All isolated compounds were identified by thorough investigation of their spectral data including NMR and HRESIMS. Antioxidant activity testing of puerol B, specionin and the new cyclic polyketide revealed that pue ...
Segewkal H. Heruye; Ted J. Warren; Joseph A. Kostansek IV; Samantha B. Draves; Stephanie A. Matthews; Peter J. West; Kristina A. Simeone; Timothy A. Simeone
ascorbicacid, etc ; brain; memory; mice; neuroplasticity; neurotransmitters; oxidative stress; plasticity; synapse; synaptic transmission; Show all 10 Subjects
Abstract:
... Ascorbic acid (AA; a.k.a. vitamin C) is well known for its cellular protection in environments of high oxidative stress. Even though physiological concentrations of AA in the brain are significant (0.2–10 mM), surprisingly little is known concerning the role of AA in synaptic neurotransmission under normal, non-disease state conditions. Here, we examined AA effects on neurotransmission, plasticity ...
ascorbicacid, etc ; Gluconobacter oxydans; NADP (coenzyme); biosynthesis; catalytic activity; fermentation; sorbose; sorbose dehydrogenase; Show all 8 Subjects
Abstract:
... 2-Keto-L-gulonic acid (2-KLG), the direct precursor of vitamin C, can be synthesized from L-sorbose by many microorganisms via “sorbose dehydrogenase” and “sorbosone dehydrogenase (SNDH)”. However, only a few studies were carried out on the catalytic properties of sorbose dehydrogenase in Gluconobacter oxydans. In this study, sorbose dehydrogenase of G. oxydans WSH-004 was identified. Different fr ...