Tag: M.W=400-500

In an article, author is Jayarathna, L., once mentioned the application of 2043-57-4, Name: 1,1,1,2,2,3,3,4,4,5,5,6,6-Tridecafluoro-8-iodooctane, Name is 1,1,1,2,2,3,3,4,4,5,5,6,6-Tridecafluoro-8-iodooctane, molecular formula is C8H4F13I, molecular weight is 474, MDL number is MFCD00039410, category is iodides-buliding-blocks. Now introduce a scientific discovery about this category.

Vibration spectroscopic evidence for different interactive modes of iodide on gibbsite in humic acid mediation

Determination of the fate of iodide and associated species is an important scientific question from environmental and nuclear energy perspectives. The chemical kinetics of iodide adsorption on gibbsite was examined in the presence of humic acids (HA). The iodide retention was highest in HA-coated gibbsite (I(I) 15.5 mu mol m(2-); pH 6.50) and lowest in HA-iodide-gibbsite ternary systems (I(I) 9.56 mu mol m(2-); pH 6.50). Both inter- and intralayer OH groups have distinguishable IR manifestations for iodide retention on gibbsite. In HA-coated gibbsite, the enhanced iodide retention was ascribed to direct bonding with surface Al-sites.

If you are interested in 2043-57-4, you can contact me at any time and look forward to more communication. Name: 1,1,1,2,2,3,3,4,4,5,5,6,6-Tridecafluoro-8-iodooctane.

Electric Literature of 2043-57-4, Children learn through play, and they learn more than adults might expect. Science experiments are a great way to spark their curiosity, 2043-57-4, Name is 1,1,1,2,2,3,3,4,4,5,5,6,6-Tridecafluoro-8-iodooctane, SMILES is ICCC(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)F, belongs to iodides-buliding-blocks compound. In a article, author is Biber, Z, introduce new discover of the category.

Determination of iodide in common salts consumed in Turkey by isotope dilution analysis

Iodide traces in common salts consumed in Turkey have been determined by isotope dilution analysis. Iodide was precipitated by stoichiometric amount of AgNO3. Iodide-131 was used as tracer. Electrophoresis was performed to separate (AgI)-I-131 from excess I-131(-). Zone of (AgI)-I-131 was cut Off electrophoresis paper and counted with a NaI(Tl) scintillation counter. Count rates were plotted versus added KI concentrations. Unknown iodide amounts were found by using these linear plots. Iodide concentrations found in analyzed salts were 9-58 mu g/g.

Electric Literature of 2043-57-4, Enzymes are biological catalysts that produce large increases in reaction rates and tend to be specific for certain reactants and products. I hope my blog about 2043-57-4 is helpful to your research.

Synthetic Route of 2043-57-4, Catalysts allow a reaction to proceed via a pathway that has a lower activation energy than the uncatalyzed reaction. 2043-57-4, Name is 1,1,1,2,2,3,3,4,4,5,5,6,6-Tridecafluoro-8-iodooctane, SMILES is ICCC(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)F, belongs to iodides-buliding-blocks compound. In a article, author is Cao, Jia, introduce new discover of the category.

Solvent-Free, Microwave-Assisted Conversion of Tosylates into Iodides

A highly efficient method for the conversion of primary tosylates into the corresponding iodides is outlined. The method involves heating a neat mixture of the tosylate and solid sodium iodide in a microwave cavity. Reaction times are short, usually about 60 minutes, delivering high yields. This procedure is especially useful for the in situ generation of volatile primary iodides, and for most of the primary iodides, the crude product is sufficiently pure.

Synthetic Route of 2043-57-4, Each elementary reaction can be described in terms of its molecularity, the number of molecules that collide in that step. The slowest step in a reaction mechanism is the rate-determining step.you can also check out more blogs about 2043-57-4.

In an article, author is REIFENHAUSER, W, once mentioned the application of 2043-57-4, Application In Synthesis of 1,1,1,2,2,3,3,4,4,5,5,6,6-Tridecafluoro-8-iodooctane, Name is 1,1,1,2,2,3,3,4,4,5,5,6,6-Tridecafluoro-8-iodooctane, molecular formula is C8H4F13I, molecular weight is 474, MDL number is MFCD00039410, category is iodides-buliding-blocks. Now introduce a scientific discovery about this category.

DETERMINATIONS OF METHYL-IODIDE IN THE ANTARCTIC ATMOSPHERE AND THE SOUTH POLAR SEA

Methyl iodide (CH3I) concentrations were determined in the atmosphere and in surface sea water near the Antarctic Peninsula with a GC/ECD system during October-December 1987. The mean air concentration of methyl iodide was 2.4 pptv with a corresponding seawater concentration of 2.6 ng l-1. In addition chloroiodomethane (CH2ClI) was detected in some of the seawater samples as a second volatile organoiodine species. No relationship between methyl iodide and biogenic brominated methanes was found. From this it follows that methyl iodide has a different pathway of biogenic production in marine organisms than the brominated methanes. Based on a two-phase model a global sea-to-air flux for methyl iodide of 8 x 10(11) g yr-1 was calculated. This is important for the balance of the global biogeochemical iodine cycle assuming that methyl iodide is by far the dominant volatile organoiodine species in the environment.

If you are interested in 2043-57-4, you can contact me at any time and look forward to more communication. Application In Synthesis of 1,1,1,2,2,3,3,4,4,5,5,6,6-Tridecafluoro-8-iodooctane.

Chemistry, like all the natural sciences, Category: iodides-buliding-blocks, begins with the direct observation of nature¡ª in this case, of matter.2043-57-4, Name is 1,1,1,2,2,3,3,4,4,5,5,6,6-Tridecafluoro-8-iodooctane, SMILES is ICCC(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)F, belongs to iodides-buliding-blocks compound. In a document, author is Martinelango, P. Kalyani, introduce the new discover.

Perchlorate in seawater – Bioconcentration of iodide and perchlorate by various seaweed species

There has been no reliable published data on the presence of perchlorate in seawater. Seaweeds are among the most important plant life in the ocean and are good sources of iodine and have been widely used as food and nutritional supplement. Perchlorate is known to inhibit the transport of iodide by the sodium iodide symporter (NIS), present e.g., in the thyroid and mammary glands. With perchlorate being increasingly detected in drinking water, milk and various other foods, increasing the iodide intake through inexpensive natural supplements may be an attractive solution for maintaining iodine assimilation. We report here measurable concentrations of perchlorate in several samples of seawater (detectable in about half the samples analyzed). We also report the iodide and perchlorate concentrations of I I different species of seaweed and the corresponding bioconcentration factors (BCF) for perchlorate and iodide, relative to the seawater from which they were harvested. All seaweed samples came from the same region, off the coast of Northeastern Maine. Concentrations of iodide and perchlorate in four seawater samples collected from the region near harvest time were 30 +/- 11 and 0.16 +/- 0.084 mu g l(-1), respectively. Concentrations of both iodide and perchlorate varied over a wide range for different seaweed species; iodide ranging from 16 to 3134 mg kg(-1) and perchlorate from 0.077 to 3.2 mg kg(-1). The Laminaria species had the highest iodide concentration; Laminaria digitata is the seaweed species most commonly used in the kelp tablets sold in health food stores. Our sample of L digitata contained 3134 +/- 15 mg iodide/kg dry weight. The BCF varied widely for different species, with Laminaria species concentrating iodide preferentially over perchlorate. The iodide BCF (BCFi) to perchlorate BCF (BCFp) quotient ranged from 0.66 to 53; L. digitata and L. saccarina having a BCFi/BCFp value of 45 and 53, respectively, far greater than a simple anion exchange process will allow. Although most seaweed samples contain some amount of perchlorate, the great majority contains iodide in so much higher amount that at least for the commonly used Laminaria species, the iodide/perchlorate ratio is greater than the square of the perchlorate to iodide selectivity factor reported for the mammalian NIS and should thus lead to net beneficial iodine nutrition even in a two-stage mother-infant scenario. (c) 2006 Elsevier B.V. All rights reserved.

Note that a catalyst decreases the activation energy for both the forward and the reverse reactions and hence accelerates both the forward and the reverse reactions. you can also check out more blogs about 2043-57-4. Category: iodides-buliding-blocks.

Reference of 2043-57-4, Children learn through play, and they learn more than adults might expect. Science experiments are a great way to spark their curiosity, 2043-57-4, Name is 1,1,1,2,2,3,3,4,4,5,5,6,6-Tridecafluoro-8-iodooctane, SMILES is ICCC(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)F, belongs to iodides-buliding-blocks compound. In a article, author is TANGYUNYONG, P, introduce new discover of the category.

BONDING, STRUCTURE AND COMPOSITIONAL DISTRIBUTION IN SHEET CRYSTAL SILVER IODOBROMIDE(III)

The addition of small amounts of iodide to the silver bromide is known to have a significant effect on the photographic properties of silver halides. The change in the photographic sensitivity depends on both the concentration and distribution of iodide ions. Hence, it is important to obtain detailed information on the chemical bonding and compositional distribution of iodide in silver halide alloys. The depth distribution of iodide ions was determined with the ISS (ion scattering spectrometry) technique at both the top and bottom (111) surface layers of AgBr0.97I0.03, AgBr0.94I0.06 and AgBr0.90I0.10 sheet crystals grown on a flat Vycor(R) (quartz) substrate. ISS data show that iodide ions are more heavily segregated at the last-solidified surface. For the first-solidified surface, there is a smaller enhancement of iodide ions within the top 100 angstrom region relative to the rest of the near-surface region. Systematic fluorescence EXAFS (extended X-ray absorption fine structure) and SEXAFS (surface EXAFS) measurements were made at 35 +/- 5 K on both the Br and I absorption edges to study the local iodide distribution, bonding and structure of the top surface and bulk layers. EXAFS and SEXAFS data show that there are significant differences in the local iodide distribution and silver ion vacancy concentration between the bulk and surface layers. These differences vary with the concentration of iodide ions in the samples. For the bulk layers, there are no changes in the local iodide distribution and silver vacancy concentration as a function of iodide concentration, in contrast to the surface layers where significant differences were observed. Changes in the iodide concentration, local iodide distribution and silver vacancy concentration have negligible effects on the nearest-neighbor distances for both the surface and bulk layers. The nearest-neighbor I-Ag and I-Br distances are found to be slightly larger that the corresponding Br-Ag and Br-Br distances.

Reference of 2043-57-4, Consequently, the presence of a catalyst will permit a system to reach equilibrium more quickly, but it has no effect on the position of the equilibrium as reflected in the value of its equilibrium constant.I hope my blog about 2043-57-4 is helpful to your research.

Reference of 2043-57-4, Children learn through play, and they learn more than adults might expect. Science experiments are a great way to spark their curiosity, 2043-57-4, Name is 1,1,1,2,2,3,3,4,4,5,5,6,6-Tridecafluoro-8-iodooctane, SMILES is ICCC(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)F, belongs to iodides-buliding-blocks compound. In a article, author is GARCIA, MD, introduce new discover of the category.

GAS-CHROMATOGRAPHIC STUDY OF THE ADSORPTION OF METHYL-IODIDE ON SEVERAL TYPES OF CARBONS

Gas chromatography has been used to measure the adsorption at zero surface coverage of methyl iodide on different types of carbon. The effect on the adsorption of methyl iodide of adding potassium iodide to the carbon samples was also studied. The differences observed in the behaviour of these samples for the adsorption of methyl iodide are explained on the basis of the textural characteristics of the samples. Thermodynamic functions of adsorption of methyl iodide at zero surface coverage are obtained.

Reference of 2043-57-4, Enzymes are biological catalysts that produce large increases in reaction rates and tend to be specific for certain reactants and products. I hope my blog about 2043-57-4 is helpful to your research.

Electric Literature of 2043-57-4, The transformation of simple hydrocarbons into more complex and valuable products via catalytic C¨CH bond functionalisation has revolutionised modern synthetic chemistry. 2043-57-4, Name is 1,1,1,2,2,3,3,4,4,5,5,6,6-Tridecafluoro-8-iodooctane, SMILES is ICCC(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)F, belongs to iodides-buliding-blocks compound. In a article, author is Vitale, M, introduce new discover of the category.

Iodide excess induces apoptosis in thyroid cells through a p53-independent mechanism involving oxidative stress

Thyroid toxicity of iodide excess has been demonstrated in animals fed with an iodide-rich diet; in vitro iodide is cytotoxic, inhibits cell growth, and induces morphological changes in thyroid cells of some species. In this study, we investigated the effect of iodide excess in an immortalized thyroid cell line (TAD-2) in primary cultures of human thyroid cells and in cells of nonthyroid origin. Iodide displayed a dose-dependent cytotoxicity in both TAD-2 and primary thyroid cells, although at different concentrations, whereas it had no effect on cells of nonthyroid origin. Thyroid cells treated with iodide excess underwent apoptosis, as evidenced by morphological changes, plasma membrane phosphatidylserine exposure, and DNA fragmentation. Apoptosis was unaffected by protein synthesis inhibition, whereas inhibition of peroxidase enzymatic activity by Dropylthiouracil completely blocked iodide cytotoxicity. During KI treatment, reactive oxygen species were produced, and lipid peroxide levels increased markedly. Inhibition of endogenous p53 activity did not affect the sensitivity of TAD-2 cells to iodide, and Western blot analysis demonstrated that p53, Bcl-2, Bcl-XL, and Bar protein expression did not change when cells were treated with iodide. These data indicate that excess molecular iodide, generated by oxidation of ionic iodine by endogenous peroxidases, induces apoptosis in thyroid cells through a mechanism involving generation of free radicals. This type of apoptosis is p53 independent, does not require protein synthesis, and is not induced by modulation of Bcl-2, Bcl-XL, or Bar protein expression.

Electric Literature of 2043-57-4, The reactant in an enzyme-catalyzed reaction is called a substrate. Enzyme inhibitors cause a decrease in the reaction rate of an enzyme-catalyzed reaction.I hope my blog about 2043-57-4 is helpful to your research.

Application of 2043-57-4, Enzymes are biological catalysts that produce large increases in reaction rates and tend to be specific for certain reactants and products. 2043-57-4, Name is 1,1,1,2,2,3,3,4,4,5,5,6,6-Tridecafluoro-8-iodooctane, SMILES is ICCC(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)F, belongs to iodides-buliding-blocks compound. In a article, author is Guan, Jin Tao, introduce new discover of the category.

CuI/PPh3 catalyzed Sonogashira coupling reaction of aryl iodides with terminal alkynes in water in the absence of palladium

The Sonogashira cross-coupling of aryl iodides with terminal alkynes catalyzed by a simple and inexpensive catalyst CuI/PPh3 in water as the sole solvent has been reported. In the presence of CuI/PPh3, with KOH used as a base, a number of aryl iodides were treated with alkynes to afford the corresponding products in moderate to excellent yields. Copyright (c) 2008 John Wiley & Sons, Ltd.

Application of 2043-57-4, Each elementary reaction can be described in terms of its molecularity, the number of molecules that collide in that step. The slowest step in a reaction mechanism is the rate-determining step.you can also check out more blogs about 2043-57-4.

One of the major reasons for studying chemical kinetics is to use measurements of the macroscopic properties of a system, such as the rate of change in the concentration of reactants or products with time. 2043-57-4, Name is 1,1,1,2,2,3,3,4,4,5,5,6,6-Tridecafluoro-8-iodooctane, formurla is C8H4F13I. In a document, author is Fisher, Jeffrey W., introducing its new discovery. COA of Formula: C8H4F13I.

Evaluation of Iodide Deficiency in the Lactating Rat and Pup Using a Biologically Based Dose-Response Model

A biologically based dose-response (BBDR) model for the hypothalamic-pituitary thyroid (HPT) axis in the lactating rat and nursing pup was developed to describe the perturbations caused by iodide deficiency on the HPT axis. Model calibrations, carried out by adjusting key model parameters, were used as a technique to evaluate HPT axis adaptations to dietary iodide intake in euthyroid (4.139 g iodide/day) and iodide-deficient (0.31 and 1.2 g iodide/day) conditions. Iodide-deficient conditions in both the dam and the pup were described with increased blood flow to the thyroid gland, TSH-mediated increase in thyroidal uptake of iodide and binding of iodide in the thyroid gland (organification), and, in general, reduced thyroid hormone production and metabolism. Alterations in thyroxine (T4) homeostasis were more apparent than for triiodothyronine (T3). Model-predicted average daily area-under-the-serum-concentration-curve (nM-day) values for T4 at steady state in the dam and pup decreased by 1415% for the 1.2 g iodide/day iodide-deficient diet and 4252% for the 0.31 g iodide/day iodide-deficient diet. In rat pups that were iodide deficient during gestation and lactation, these decreases in serum T4 levels were associated with declines in thyroid hormone in the fetal brain and a suppression of synaptic responses in the hippocampal region of the brain of the adult offspring (Gilbert et al., 2013).

I hope this article can help some friends in scientific research. I am very proud of our efforts over the past few months and hope to 2043-57-4 help many people in the next few years. COA of Formula: C8H4F13I.