This work studied the sensitivity of postharvest period early maturing nectarine trees (Prunus persica L. Batsch, cv. Flariba) to water stresses. Along with a well-irrigated treatment (T-0), three deficit treatments (by withholding irrigation) were applied: T-1: (June–July), T-2: late (August–September), and T-3: whole (June–September). Soil content (?v) midday stem potential (?stem) measured t...

Introduction: The relation between morphine and nitric oxide release has been shown. Due to important role of nitric oxide in regulation of skin blood flow, the aim of this study was to investigate the effect of nitric oxide synthase inhibitor (L-NAME) and nitric oxide synthesis precursor (L-arginine) on skin blood flow of intact and morphine-dependent rats. Methods: Skin blood flow of hind pa...

Background: According to increased consumption of supplements especially during pregnancy and the teratogenic impact some they on evolution the vital systems of embryos. The purpose of this study to Improve the health of the fetus and prevention of cardiovascular abnormalities as the most common cause of infant mortality. We examined the effects of L-Arginine and L-NAME administration on fetal ...

A deficient L-arginine-nitric oxide system is implicated in cortisol-induced hypertension. We investigate whether abnormalities in L-arginine uptake contribute to this deficiency. Eight healthy men were recruited. Hydrocortisone acetate (50 mg) was given orally every 6 hours for 24 hours after a 5-day fixed-salt diet (150 mmol/d). Crossover studies were performed 2 weeks apart. Thirty millilite...

The role of glutamate receptor within the nucleus accumbens in morphine tolerance has been postulated. Previous studies have reported that glutamate receptors exert their effects in part through the release of nitric oxide (NO). In the present study the effects of intra-accumbal injections of L-arginine (0.3, 1, and 3 ?g/rat), the NO precursor and L-NAME (0.3, 1, and 3 ?g/rat), the NOS inhibito...

Previous studies have reported that morphine exerts its effects in part through the release of nitric oxide (NO). It has been pustulated that drug sensitization is a major cause of relapse to drug use in addicts. In the present study the effects of intra-accumbal injections of L-arginine, the NO precursor and L-NAME, the NOS inhibitor on the morphine sensitization in Wistar rats (250-300 g) wer...

663 Nitric oxide (NO) is derived from the oxidation of the semiessential amino acid L-arginine by the NO synthases. Evidence supporting a central role for L-arginine in the NO synthase pathway comes from several observations. First, NO synthesis by cultured endothelial cells depends upon L-arginine content of the media (1). In addition, NO synthesis is blocked by L-arginine analogues (2), such ...

The effect of brain L-arginine on arterial pressure was investigated by injecting L- or D-arginine into the cerebral ventricles of male Wistar rats that were anesthetized with urethane. Intracerebroventricular (I.C.V.) injection of 1 micromol L-arginine reduced the arterial pressure and the abdominal sympathetic nervous activity (SNA), whereas the injection of 10 micromol L-arginine induced a t...

In this study, three different reusable photocatalysts containing amino acids as a source of non-metals, including L-Arginine, L-Proline, and L-Methionine, have been synthesized for the first time. Using kinetic study degradation efficiency test, these visible driven were investigated their photocatalytic activity in removing antibiotics, metronidazole (MNZ) cephalexin (CEX). The morphology, st...