1. Pregnant guinea-pigs receiving a low dose of L-ascorbic acid (0.2 mg/100 g body-weight per d) developed a hypercholesterolaemia in the third trimester of pregnancy, whereas no change in serum cholesterol levels was observed in pregnant animals receiving a higher dose of the vitamin (2 mg/100 g body-weight per d). 2. Pregnancy in the group of guinea-pigs receiving the higher dose of L-ascorbi...

Wheat (Triticum aestivum L.) is widely cultivated in the Mediterranean zone where plantsgenerally suffer from water stress during heading and reproductive stages. This research wascarried out at the experimental farm of the faculty of agriculture, Kafrelsheikh University usingtwo water treatments (water stress and well-watered), four N levels (0, 80, 160 and 240 kg ha-1)and two ascorbic acid le...

Ascorbic acid enhances NO bioactivity in patients with vascular disease through unclear mechanism(s). We investigated the role of intracellular ascorbic acid in endothelium-derived NO bioactivity. Incubation of porcine aortic endothelial cells (PAECs) with ascorbic acid produced time- and dose-dependent intracellular ascorbic acid accumulation that enhanced NO bioactivity by 70% measured as A23...

Determinations of the concentration of ascorbic acid in whole blood (1, 2, 3, 4, 5, 6, 7, 8) and in plasma or serum (9, 10, 11, 12, 13, 14, 15, 16, 17, 18) as well are believed to indicate the degree of saturation of the organism. No strict correlation, however, has been established between the ascorbic acid content of whole blood and of plasma, although the concentration in cells is consistent...

OBJECTIVE To study the bioavailibility of nonheme iron from standard and test meals in Pakistani adults and to determine iron absorption using extrinsically tagged iron 59Fe. SUBJECTS AND METHODS Nonheme iron absorption was measured from standard and test meals in ten healthy individuals. Total calories, carbohydrates, proteins, fats, ascorbic acid, total iron, phytate and ascorbic acid conte...

The amino acid composition (AAC) of proteomes differs greatly between microorganisms and is associated with the environmental niche they inhabit, suggesting that these changes may be adaptive. Similarly, the oligonucleotide composition of genomes varies and mayconferadvantagesat theDNA/RNA level. These influencesoverlap inprotein-coding sequences,making itdifficult togauge their relative contri...

It has been suggested that ascorbic acid is necessary for the transparency and metabolism of the crystalline lens (see Bellows, 1944). Primarily, this is based on well-authenticated observations of a loss of ascorbic acid from animal and human lenses undergoing spontaneous opacification. In experimentally induced cataract, however, loss of ascorbic acid does not always occur; thus, naphthalene ...

l-Ascorbic acid functions as a precursor of oxalic acid in several oxalate-accumulating plants. The present study extends this observation to include Rumex crispus L. (curly dock), Amaranthus retroflexus L. (red root pigweed), Chenopodium album L. (lamb's-quarters), Beta vulgaris L. (sugar beet), Halogeton glomeratus M. Bieb. (halogeton), and Rheum rhabarbarum L. (rhubarb). Several species with...

A dynamic method was developed for kinetic model parameter estimation of ascorbic acid degradation during air-dehydration of pretreated (sucrose and sulphiting pretreatments) pineapple slices. Pineapple slices were pretreated in sucrose solution of 40% and 60% and SO2 solution of 1500ppm and 2500ppm SO2 respectively before air-dried in a cabinet dried for 10h at 700C temperature. Ascorbic acid ...