HAVE INSTITUTED a colorimetric chloride procedure which has been in use for 3 years in our laboratory and has met with great success. This colorimetric method is based on a procedure used in automated syStems* (2, 3). It is extremely simple, quite accurate, and gives highly reproducible results even in the hands of student technicians. Those laboratories not having access to a chloridometer or ...

Aldoxime dehydratase is a heme-containing enzyme that utilizes the ferrous rather than the ferric ion to catalyze the synthesis of nitriles by dehydration of the substrate. We report a theoretical study of this enzyme aimed at elucidating its catalytic mechanism and understanding this oxidation state preference (Fe(2+) versus Fe(3+)). The uncatalyzed dehydration reaction was modeled by includin...

iron reducing bacteria (irb) are one of the most applicable microorganisms in various industrial and environmental activities. these bacteria play a main role in the natural iron transformation. they act in a reverse metabolic pathway in contrast to iron oxidizing bacteria. in the anaerobic conditions irb are capable to use ferric ion as the final electron acceptor and reduce fe3+ to fe2+. what...

We present a systematic study using density functional theory (DFT) and coupled cluster (CCSD(T)) computations with an aim of characterizing a non-heme ferric-superoxo complex [(TMC)Fe(O2)](2+) (TMC = 1,4,8,11-tetramethyl-1,4,8,11-tetraazacyclotetradecane) that was proposed to perform allylic C-H activation of cyclohexene (Lee, Y.-M. et al. J. Am. Chem. Soc.2010, 132, 10668). As such, we invest...

Nocardamine, a kind of siderophore, was isolated as an inducer of morphological changes in the insect cells, BM-N4. It changed the morphology of the cells from round to an unusual spindle shape. This activity of nocardamine was inhibited by adding the ferric ion.

Automated and manual direct methods for the determination of urea in blood or serum are described. These methods determine urea by the colored product formed when urea, in relatively weak acid solution, reacts with diacetyl monoxime in the presence of thiosemicarbazide and ferric ion. Results are compared with those obtained by urease conversion of urea to ammonia and measurement of the ammonia...

introduction: controlling parenchymal hemorrhage, especially in liver, is still one of the challenges surgeons face with when they try to save the patients’ lives despite improvements in surgical procedures. there is a research contest between the researchers in this field to introduce more effective methods. this study aimed to compare the hemostatic effect of ferric sulfate and ferric chlorid...

Aim: Evaluation of effect shodhana process datura seed (Datura stramonium) antioxidant activity. Methods: The was purified with two different processes viz. cow’s urine, and milk by Dolayantra method. Antioxidant activity evaluated in-vitro 1,1-Diphenyl-2-picryl hydrazyl (DPPH) radicals scavenging Ferric reducing power ability (FRPA) assay. Result: cow urine (CUD) showed a significant in inhibi...

Because the hydrolysis of ferric ion makes it very insoluble in aerobic, near neutral pH environments, most species of bacteria produce siderophores to acquire iron, an essential nutrient. The chirality of the ferric siderophore complex plays an important role in cell recognition, uptake, and utilization. Corynebactin, isolated from Gram-positive bacteria, is structurally similar to enterobacti...

Two current technologies used in biosensor development are very promising: 1. The sol-gel process of making microporous glass at room temperature, and 2. Using a fluorescent compound that undergoes fluorescence quenching in response to a specific analyte. These technologies have been combined to produce an iron biosensor. To optimize the iron (II or III) specificity of an iron biosensor, pyover...