Month: March 2021

The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature. COA of Formula: C17H22I3N3O8, 60166-93-0, Name is Iopamidol, SMILES is O=C(C1=C(I)C(NC([C@@H](O)C)=O)=C(I)C(C(NC(CO)CO)=O)=C1I)NC(CO)CO, in an article , author is Corvilain, B, once mentioned of 60166-93-0.

Stimulation by iodide of H2O2 generation in thyroid slices from several species

The regulation of thyroid metabolism by iodide involves numerous inhibitory effects. However, in unstimulated dog thyroid slices, a small inconstant stimulatory effect of iodide on H2O2 generation is observed. The only other stimulatory effect reported with iodide is on [1-C-14]glucose oxidation, i.e., on the pentose phosphate pathway. Because we have recently demonstrated that the pentose phosphate pathway is controlled by H2O2 generation, we study here the effect of iodide on basal H2O2 generation in thyroid slices from several species. Our data show that in sheep, pig, bovine, and to a lesser extent dog thyroid, iodide had a stimulatory effect on H2O2 generation. In horse and human thyroid, an inconstant effect was observed. We demonstrate in dogs that the stimulatory effect of iodide is greater in thyroids deprived of iodide, raising the possibility that differences in thyroid iodide pool may account, at least in part, for the differences between the different species studied. This represents the first demonstration of an activation by iodide of a specialized thyroid function. In comparison with conditions in which an inhibitory effect of iodide on H2O2 generation is observed, the stimulating effect was observed for lower concentrations and for a shorter incubation time with iodide. Such a dual control of H2O2 generation by iodide has the physiological interest of promoting an efficient oxidation of iodide when the substrate is provided to a deficient gland and of avoiding excessive oxidation of iodide and thus synthesis of thyroid hormones when it is in excess. The activation of H2O2 generation may also explain the well described toxic effect of acute administration of iodide on iodine-depleted thyroids.

But sometimes, even after several years of basic chemistry education, it is not easy to form a clear picture on how they govern reactivity! 60166-93-0, you can contact me at any time and look forward to more communication. COA of Formula: C17H22I3N3O8.

In an article, author is Birin, K. P., once mentioned the application of 450412-29-0, Recommanded Product: 450412-29-0, Name is 1-Bromo-3-fluoro-2-iodobenzene, molecular formula is C6H3BrFI, molecular weight is 300.8949, MDL number is MFCD07368675, category is iodides-buliding-blocks. Now introduce a scientific discovery about this category.

Ion aggregation of methylpyrazinium iodide and its derivatives in crystals and in solutions of nonpolar solvents

Aggregation of methylpyrazinium iodide and its derivatives in chloroform and dichloromethane solutions was studied by EAS and H-1 NMR spectroscopy. The isopentylpyrazinium iodide ion quadruple formation constants in solutions were evaluated. Formal extinction coefficient in the outer-sphere charge transfer band maxima does not depend on the degree of aggregation in the system. A model suggested for the formation of ion quadruples in solutions was discussed in terms of the density functional theory and using the X-ray diffraction data for crystalline methylpyrazinium iodides and its derivatives.

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Chemo-enzymatic cascade processes are invaluable due to their ability to rapidly construct high-value products from available feedstock chemicals in a one-pot relay manner. In an article, author is Handley, C. M., once mentioned the application of 460-37-7, Name is 1,1,1-Trifluoro-3-iodopropane, molecular formula is C3H4F3I, molecular weight is 223.9635, MDL number is MFCD00038531, category is iodides-buliding-blocks. Now introduce a scientific discovery about this category, Product Details of 460-37-7.

A new potential for methylammonium lead iodide

We present a new set of interatomic potentials for modelling methylammonium lead iodide. The potential model uses existing potentials for lead iodide and methylammonium, and new functions are fitted to enable these pre-existing potentials to be used together, while still being capable of modelling lead iodide and methylammonium iodide as separate materials. Fitting was performed using a combination of ab initio and experimental reference data. Our simulations are in agreement with experiment and reveal the short and long range ordering of the molecular cations and lead iodide octahedra.

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Chemistry is traditionally divided into organic and inorganic chemistry. The former is the study of compounds containing at least one carbon-hydrogen bonds. 19094-56-5, Name is 2-Chloro-5-iodobenzoic acid, molecular formula is C7H4ClIO2, belongs to iodides-buliding-blocks compound, is a common compound. In a patnet, author is Keyvanfard, Mohsen, once mentioned the new application about 19094-56-5, HPLC of Formula: C7H4ClIO2.

Catalytic Kinetic Determination of Trace Amounts of Iodide by The Spectrophotometric Method with Spadns in Micellar Medium

A new, simple, sensitive and selective catalytic spectrophotometric method was developed for the determination of trace amounts of iodide. The method is based on the catalytic effect of iodide on the oxidation of Spadns by bromate in micellar medium. The reaction was monitored spectrophotometrically by measuring the decrease in absorbance of Spadns at 507 nm with a fixed-time method. The decrease in the absorbance of Spadns is proportional to the concentration of iodide in concentration range 60.0-300.0 ng/mL, with a fixed time of 0.5-3.0 min from initiation of the reaction. The limit of detection is 20 ng/mL iodide. The relative standard deviation of 0.08 and 0.10 mu g/mL iodide was 1.7 and 2.4%, respectively. The method was applied to the determination of iodide in water.

We¡¯ll also look at important developments in the pharmaceutical industry because understanding organic chemistry is important in understanding health, medicine, 19094-56-5. The above is the message from the blog manager. HPLC of Formula: C7H4ClIO2.

Application of 507-63-1, Catalysts allow a reaction to proceed via a pathway that has a lower activation energy than the uncatalyzed reaction. 507-63-1, Name is Heptadecafluoro-1-iodooctane, SMILES is IC(F)(F)C(F)(F)C(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 Li, H., introduce new discover of the category.

Ontogenic changes in human placental sodium iodide symporter expression

The human fetus requires a maternal supply of iodide to synthesize thyroid hormone from 16 weeks gestation. Placental iodide transport is regulated by the sodium iodide symporter (NIS). We studied the ontogeny of NIS in placentas from surgically terminated pregnancies and from normal term pregnancies. NIS mRNA was low at 6 weeks gestation and peaked at 12 weeks gestation. Placental NIS protein levels are significantly correlated with gestational age during early pregnancy and increase with increased placental vascularization. This would lead to increased iodide supply to meet increased fetal requirements for thyroid hormone synthesis as the pregnancy progresses. Crown Copyright (c) 2012 Published by Elsevier Ltd. All rights reserved.

Application of 507-63-1, 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 507-63-1.

Catalysts are substances that increase the reaction rate of a chemical reaction without being consumed in the process. 610-97-9, Name is Methyl 2-iodobenzoate, SMILES is O=C(OC)C1=CC=CC=C1I, belongs to iodides-buliding-blocks compound. In a document, author is Rillema, JA, introduce the new discover, COA of Formula: C8H7IO2.

Prolactin regulation of the pendrin-iodide transporter in the mammary gland

Iodide is an essential constituent of milk that is present in concentrations more than an order of magnitude higher than in the maternal plasma. Earlier, a sodium-iodide symporter was identified in the mammary gland; this transporter is presumed to take iodide from the maternal plasma into the alveolar epithelial cells of the mammary gland. We now report the existence of a second iodide transporter, pendrin, which is also essential for iodide accumulation in milk. Via Western blotting methods, high levels of the transporter were detected in lactating tissues; lesser amounts were found in tissues from midpregnant and virgin mice. Prolactin, at physiological concentrations, stimulated the expression of the pendrin transporter in cultured mammary tissues taken from 12- to 14-day-pregnant mice. The prolactin effect on iodide uptake into cultured mammary tissues was abolished by pendrin transport inhibitors, including DIDS, furosemide, and probenecid. These studies suggest that the prolactin stimulation of pendrin activity is an essential element in the prolactin stimulation of iodide uptake into milk.

The proportionality constant is the rate constant for the particular unimolecular reaction. the reaction rate is directly proportional to the concentration of the reactant. I hope my blog about 610-97-9 is helpful to your research. COA of Formula: C8H7IO2.

A catalyst don’t appear in the overall stoichiometry of the reaction it catalyzes, but it must appear in at least one of the elementary reactions in the mechanism for the catalyzed reaction. 88-67-5, Name is 2-Iodobenzoic acid, molecular formula is C7H5IO2. In an article, author is Harada, T,once mentioned of 88-67-5, SDS of cas: 88-67-5.

LDA-catalyzed cycloisomerization of 2-(2-propynyloxy)ethyl iodides leading to 3-(iodomethylene)tetrahydrofurans

LDA catalyzes cycloisomerization of 2-(2-propynyloxy)ethyl iodides to give 3-(iodomethylene)tetrahydrofurans. The reaction is proposed to proceed through a mechanism involving exo-cyclization of an alkynyllithium intermediate and protonation of the resulting alkylidene carbenoid by the starting iodide.

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Reactions catalyzed within inorganic and organic materials and at electrochemical interfaces commonly occur at high coverage and in condensed media, causing turnover rates to depend strongly on interfacial structure and composition, 507-63-1, Name is Heptadecafluoro-1-iodooctane, SMILES is IC(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)F, in an article , author is Huebner, L, once mentioned of 507-63-1, Computed Properties of C8F17I.

Heterometallic lanthanide group 12 metal iodides

Neodymium tri-iodide reacts with Group 12 metal (M; M = Zn, Cd, Hg) iodides to form heterometallic compounds. These Lewis acidic M cleave Nd-I bonds to give either ionic {[(THF)(5)NdI2][MI3THF]; M = Zn, Cd} or charge-neutral {(THF)(5)NdI(mu(2)I)HgI3} compounds. Differences in structure are interpreted primarily in terms of M-L bond strengths, rather than Nd-L bond strengths. Experiments with Yb indicate that if there is any excess iodide present in these syntheses then the most readily isolated product is a triiodide salt, i.e., [(THF)(5)Yb-2][I-3]. In conventional solvents the presence of Lewis acid is not required for iodide displacement-from pyridine, YbI3 crystallizes as [(py)(5)YbI2][I]. These compounds are potentially useful as heterometallic sources of lanthanide-doped iodide matrixes, they illustrate the ease with which iodides are displaced from lanthanide coordination spheres, and they underscore the complexity associated with using lanthanide iodides as Lewis acid catalysts.

Interested yet? Read on for other articles about 507-63-1, you can contact me at any time and look forward to more communication. Computed Properties of C8F17I.

The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature. 610-97-9, Name is Methyl 2-iodobenzoate, SMILES is O=C(OC)C1=CC=CC=C1I, in an article , author is Eng, PHK, once mentioned of 610-97-9, Computed Properties of C8H7IO2.

Regulation of the sodium iodide symporter by iodide in FRTL-5 cells

Objective: The acute decrease in iodide organification in the thyroid in response to excess iodide is termed the acute Wolff-Chaikoff effect and normal organification resumes in spite of continued high plasma iodide concentrations (escape from the acute Wolff-Chaikoff effect). We have recently reported that large doses of iodide given to rats chronically decrease the sodium/iodide symporter (NIS) mRNA and protein, suggesting that escape is due to a decrease in NIS and subsequent iodide transport. We have now studied the effect of excess iodide on NIS in FRTL-5 cells to further explore the mechanisms whereby excess iodide decreases NIS. Design: FRTL-5 cells were employed and were incubated in the presence or absence of various concentrations of iodide. NIS mRNA and protein and the turnover of NIS were assessed. Methods: NIS mRNA was measured by Northern analysis. NIS protein by Western analysis and NIS turnover by pulse-chase labeling experiments. Results: Iodide (10(-3) mol/l) had no effect on NIS mRNA in FRTL-5 cells at 24 and 48 h compared with cells cultured in the absence of iodide. However, excess iodide decreased NIS protein by 50%, of control values at 24 h and by 70%, at 48 h. This effect of iodide was dose dependent. Pulse-chase experiments demonstrated that there was no effect of iodide on new NIS protein synthesis and that the turnover of NIS protein in the presence of iodide was 27% faster than in the absence of added iodide. Conclusions: Excess iodide does not decrease NIS mRNA in FRTL-5 cells but does decrease NIS protein, suggesting that in this in vitro thyroid cell model iodide modulates NIS, at least in part, at a posttranscriptional level. This iodide-induced decrease in NIS protein appears to he due, at least partially, to an increase in NIS protein turnover.

Interested yet? Read on for other articles about 610-97-9, you can contact me at any time and look forward to more communication. Computed Properties of C8H7IO2.

Chemistry, like all the natural sciences, Formula: C6H3BrFI, begins with the direct observation of nature¡ª in this case, of matter.450412-29-0, Name is 1-Bromo-3-fluoro-2-iodobenzene, SMILES is FC1=CC=CC(Br)=C1I, belongs to iodides-buliding-blocks compound. In a document, author is Gervay, J, introduce the new discover.

Anionic additions to glycosyl iodides: Highly stereoselective syntheses of beta-, C-, N-, and O-glycosides

Classically, glycosyl halides are activated as glycosyl donors by metal chelation under Koenigs-Knorr or Helferich conditions. These reactions often proceed through oxonium formation, and the stereochemical outcome is dictated by the anomeric effect and/or the nature of the protecting group on the C2 hydroxyl. Alternatively, glycosyl halides may undergo direct displacement of the halide by an incoming nucleophile in an S(N)2 mechanism. The latter reaction is far less common, and before this study it was primarily performed with glycosyl bromides. Having recently shown that both alpha and beta glycosyl iodides could be efficiently generated, we embarked upon an investigation of nucleophilic additions to glycosyl iodides. The studies reported herein show that additions of stabilized anions to alpha-glycosyl iodides proceed with inversion of stereochemistry to give beta-glycosides, even in the absence of a C2 participatory group. Glucosyl, galactosyl, and mannosyl iodides were studied, and the combined results indicate that the reactivity of 2,3,4,6-tetra-O-benzyl-alpha-D-galactosyl iodide > 2,3,4,6-tetra-O-benzyl-alpha-D-glucosyl iodide > 2,3,4,6-tetra-O-benzyl-alpha-D-mannosyl iodide. Both the glucosyl and galactosyl iodides are susceptible to E-2 elimination when treated with highly basic anions. In contrast, the mannosyl iodide undergoes substitution to give the 1,2 cis configuration. The overall sequence involves reaction of an anomeric acetate with trimethylsilyl iodide with in vacuo removal of the resulting trimethylsilyl acetate. The iodide is then treated with a nucleophile without further characterization. A variety of nucleophiles were stereoselectively added to the glycosyl halides providing beta-, C-, N-, and O-glycosides.

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 450412-29-0. Formula: C6H3BrFI.