scholarly journals Effect of Ascorbic Acid and Indolyl Acetic Acid on Regeneration of Willow Branches and Germination

Nature ◽  
1936 ◽  
Vol 137 (3467) ◽  
pp. 618-618 ◽  
Author(s):  
W. DAVIES ◽  
G. A. ATKINS ◽  
P. C. B. HUDSON
Keyword(s):  
Ascorbic Acid ◽  
Acetic Acid ◽  
Indolyl Acetic Acid

Different response to acetic acid stress inSaccharomyces cerevisiaewild-type andl-ascorbic acid-producing strains

Yeast ◽  
2013 ◽  
Vol 30 (9) ◽  
pp. 365-378 ◽  
Author(s):  
Francesca Martani ◽  
Tiziana Fossati ◽  
Riccardo Posteri ◽  
Lorenzo Signori ◽  
Danilo Porro ◽  
...  
Keyword(s):  
Ascorbic Acid ◽  
Acetic Acid ◽  
Acid Stress ◽  
Different Response

scholarly journals Membrane Permeabilities of Ascorbic Acid and Ascorbate

Biomolecules ◽  
2018 ◽  
Vol 8 (3) ◽  
pp. 73 ◽  
Author(s):  
Christof Hannesschlaeger ◽  
Peter Pohl
Keyword(s):  
Ascorbic Acid ◽  
Acetic Acid ◽  
Lipid Bilayers ◽  
Redox Balance ◽  
The Other ◽  
Lipid Matrix ◽  
Transport Pathway ◽  
Transcellular Transport ◽  
Membrane Permeabilities ◽  
Ph Microelectrodes

Vitamin C (VC)—a collective term for the different oxidation and protonation forms of ascorbic acid (AscH)—is an essential micronutrient that serves as (i) a potent antioxidant and (ii) a cofactor of a manifold of enzymatic processes. Its role in health is related to redox balance maintenance, which is altered in diseases such as obesity, cancer, neurodegenerative diseases, hypertension, and autoimmune diseases. Despite its importance, VC uptake has been poorly investigated. Available literature values for the passive membrane permeability P of lipid bilayers for AscH scatter by about 10 orders of magnitude. Here, we show by voltage clamp that P − of AscH’s anionic form (ascorbate Asc − ) is negligible. To cross the membrane, Asc − picks up a proton in the membrane vicinity and releases it on the other side of the membrane. This leads to a near-membrane pH drop that was visualized by scanning pH microelectrodes. The AscH concentration dependent pH profiles indicated P   =   1.1   ±   0.1   ×   10 − 8   cm / s . Thus, AscH’s P is comparable to that of sorbitol and much lower than that of other weak acids like acetic acid or salicylic acid. The observation suggests that the capacity of the passive transcellular transport pathway across the lipid matrix does not suffice to ensure the required VC intake from the gastrointestinal tract.

INFLUENCE OF CHITOSAN SOLUTION ON THE VIABILITY OF ARBUSCULAR MYCORRHIZAL SPORES

2021 ◽  
pp. 7-9
Author(s):  
Nalini Singh ◽  
Sunita Chahar
Keyword(s):  
Ascorbic Acid ◽  
Acetic Acid ◽  
Chemical Method ◽  
Arbuscular Mycorrhizal ◽  
Chitosan Solution ◽  
Spore Viability ◽  
Tetrazolium Bromide ◽  
Shrimp Shells ◽  
Arbuscular Mycorrhizal Fungal

The study was aimed to fortify the Arbuscular Mycorrhizal Fungal (AMF) spores, widely used in Bio-fertilizers with chitosan and check the inuence of chitosan on the viability of AMF spores. Chitosan was prepared from shrimp shells using chemical method involving demineralization, deproteinization and deacetylation.AMF spores were kept in three different concentrations of chitosan (0.1%, 0.5 %and 1%) which was prepared in 0.1% acetic acid and 0.1% ascorbic acid. Spore viability was checked by the MTT 3-(4, 5 th th th dimethylthiazol-yl-2, 5-diphenyl-2H-tetrazolium bromide) after a day, 10 day, 20 day and 30 day. Highest number of viable spores was observed in chitosan dissolved in 0.1% ascorbic acid as compared to chitosan in acetic acid.

scholarly journals Determination of Ascorbic Acid in Enriched Evaporated Milk

1967 ◽  
Vol 50 (4) ◽  
pp. 817-820
Author(s):  
O Pelletier
Keyword(s):  
Ascorbic Acid ◽  
Acetic Acid ◽  
Acid Solution ◽  
Coefficient Of Variation ◽  
Metaphosphoric Acid

Abstract Ascorbic acid can be determined in enriched evaporated milk by titration with 2,6-dichIoroindophenol. Most of the interfering substances are removed by precipitation with an acetic acid-metaphosphoric acid solution. Blank titrations obtained after condensing ascorbic acid with formaldehyde are used to correct for traces of interfering substances remaining in solution. Recoveries of ascorbic acid added to milk were 98.5% (coefficient of variation, 1.9). In a collaborative assay involving six analysts, the coefficient of variation was about 2% for one analyst on any day and 3.5% among analysts "on any day.

Sign in / Sign up

Export Citation Format

Share Document