Online Pharmacy, Tramadol, Paxil, antibiotics, amoxicillin, zithromax, Rx Online, pharmaceuticals, DHEA, prescription medications, prescription drugs.

Drugs online research references

Biosens Bioelectron. 2000 Mar;15(1-2):1-5.
Amperometric biosensors/sequential injection analysis system for simultaneous determination of S- and R-captopril.

Stefan RI, van Staden JK, Aboul-Enein HY.

Department of Chemistry, University of Pretoria, South Africa.

Two amperometric biosensors based on L- and D-amino acid oxidase, respectively, are proposed for the simultaneous detection of S- and R-captopril in a sequential injection analysis system (SIA). The linear concentration ranges are: 0.4-1.6 micromol/l (S-captopril) and 120-950 nmol/l (R-captopril) with detection limits of 0.2 and 15 nmol/l, respectively. The biosensors/SIA system can be used reliably on-line in synthesis process control, for the simultaneous assay of S- and R-captopril with a frequency of 34 samples/h.

online pharmacy ref source: www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10826637&dopt=Abstract

Am J Physiol Endocrinol Metab. 2000 Jun;278(6):E1027-30.
Role of adrenal renin-angiotensin system in the control of aldosterone secretion in sodium-restricted rats.

Mazzocchi G, Malendowicz LK, Markowska A, Albertin G, Nussdorfer GG.

Section of Anatomy, Department of Human Anatomy and Physiology, University of Padua, I-35121 Padua, Italy.

This study examined the effect of the pharmacological manipulation of adrenal renin-angiotensin system (RAS) on aldosterone secretion from in situ perfused adrenals of rats kept on a normal diet and sodium restricted for 14 days. Neither the angiotensin-converting enzyme inhibitor captopril nor the nonselective angiotensin II receptor antagonist saralasin and the AT(1) receptor-selective antagonist losartan affected basal aldosterone output in normally fed rats. In contrast, they concentration dependently decreased aldosterone secretion in sodium-restricted animals, with maximal effective concentration ranging from 10(-7) to 10(-6) M. Captopril (10(-6) M), saralasin (10(-6) M), and losartan (10(-7) M) counteracted aldosterone response to 10 mM K(+) in sodium-restricted rats but not in normally fed animals. Collectively, these findings provide evidence that adrenal RAS plays a role in the regulation of aldosterone secretion, but only under conditions of prolonged stimulation of zona glomerulosa probably leading to overexpression of adrenal RAS.

online pharmacy ref source: www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10827004&dopt=Abstract

J Lipid Res. 2000 Jun;41(6):1013-9.
A quantitative assay for the non-covalent association between apolipoprotein[a] and apolipoprotein B: an alternative measure of Lp[a] assembly.

Dardik BN, Schwartzkopf CD, Stevens DE, Chatelain RE.

Novartis Institute for Biomedical Research, Novartis Pharmaceuticals Corporation, Summit, NJ 07901, USA.

Increasing evidence suggests that the assembly of lipoprotein[a] (Lp[a]) proceeds in two steps. In the first step, non-covalent interactions between apolipoprotein[a] (apo[a]) and apolipoprotein B (apoB) of low density lipoprotein (LDL) form a dissociable apo[a]:LDL complex. In the second step, a covalent disulfide linkage forms the stable Lp[a] particle. Several methods are currently used to study the assembly of Lp[a], however, these methods are laborious, time-consuming, and not suitable for a high throughput screening. We report here the development of a rapid and simple assay based on the binding of labeled LDL to a Lp[a]/apo[a] substrate which is immobilized on the surface of a microtiter plate. Quantification of bound LDL provides a measure of the extent of complex formation. Labeled LDL bound to both Lp[a] and apo[a] substrates with similar affinity. Plasma lipoproteins containing apoB as well as free apo[a] were capable of competing with LDL binding. The binding of LDL to Lp[a]/apo[a] was inhibited by L-proline and lysine analogs, which are known to inhibit the non-covalent association between apo[a] and apoB. Using this method we have found that nicotinic acid and captopril are able to inhibit the association of apo[a] with apoB. This method is compatible with automation and can be applied to a high throughput screening of inhibitors of Lp[a] formation.

online pharmacy ref source: www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10828094&dopt=Abstract

online pharmacies || Hair Million herbal formula for hair loss and hair growth || Amoxicillin || Tramadol || Paxil || Rx Drugs USA, Prescription Drugs Online Pharmacy || Zithromax || online pharmacy || Antibiotics and prescription medications online literature || Antibiotics