Author: Jessica.F

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.

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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.

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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.

Let¡¯s face it, organic chemistry can seem difficult to learn. Especially from a beginner¡¯s point of view. Like 450412-29-0, Name is 1-Bromo-3-fluoro-2-iodobenzene. In a document, author is Chen, JG, introducing its new discovery. Name: 1-Bromo-3-fluoro-2-iodobenzene.

A convenient synthesis of fluoroalkyl ketones and sulfones from perfluoroisopropyl iodide

In the presence of hexaethylphosphorus triamide (HEPT), perfuoroisopropyl iodide is reacted directly with perfluoroalkyl acid halides, trifluoromethanesulfonyl fluoride, and methanesulfonyl chloride ir benzonitrile to give the corresponding fluorinated ketones and sulfones. Diglyme is the solvent of choice for the reaction of pentafluorobenzoyl chloride with perfluoroisopropyl iodide in the presence of HEPT. (C) 1998 Elsevier Science S.A.

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Reference of 19094-56-5, The transformation of simple hydrocarbons into more complex and valuable products via catalytic C¨CH bond functionalisation has revolutionised modern synthetic chemistry. 19094-56-5, Name is 2-Chloro-5-iodobenzoic acid, SMILES is O=C(O)C1=CC(I)=CC=C1Cl, belongs to iodides-buliding-blocks compound. In a article, author is Liu, Xiangnan, introduce new discover of the category.

Ultrasensitive iodide detection based on the resonance light scattering of histidine-stabilized gold nanoclusters

We have developed a novel resonance light scattering (RLS) assay for the sensitive and selective determination of iodide. It is based on the use of histidine-stabilized gold nanoclusters (His-AuNCs) which undergo fusion and aggregation in the presence of iodide. The resulting enhancement in the intensity of RLS is proportional to the concentration of iodide in the 0.01 to 8.0 mu M range, and the detection limit is as low as 1.8 nM at a signal-to-noise ratio of 3. This turn-on method is highly selective for iodide and not interfered by other ions commonly present. It was applied to the determination of iodide in (spiked) real water samples.

Reference of 19094-56-5, Because enzymes can increase reaction rates by enormous factors and tend to be very specific, typically producing only a single product in quantitative yield, they are the focus of active research.you can also check out more blogs about 19094-56-5.

Chemistry is the experimental science by definition. We want to make observations to prove hypothesis. For this purpose, we perform experiments in the lab. , Category: iodides-buliding-blocks, 610-97-9, Name is Methyl 2-iodobenzoate, molecular formula is C8H7IO2, belongs to iodides-buliding-blocks compound. In a document, author is Pesce, Liuska, introduce the new discover.

TSH Regulates Pendrin Membrane Abundance and Enhances Iodide Efflux in Thyroid Cells

Thyroid hormones are essential for normal development and metabolism. Their synthesis requires transport of iodide into thyroid follicles. The mechanisms involving the apical efflux of iodide into the follicular lumen are poorly elucidated. The discovery of mutations in the SLC26A4 gene in patients with Pendred syndrome (congenital deafness, goiter, and defective iodide organification) suggested a possible role for the encoded protein, pendrin, as an apical iodide transporter. We determined whether TSH regulates pendrin abundance at the plasma membrane and whether this influences iodide efflux. Results of immunoblot and immunofluorescence experiments reveal that TSH and forskolin rapidly increase pendrin abundance at the plasma membrane through the protein kinase A pathway in PCCL-3 rat thyroid cells. The increase in pendrin membrane abundance correlates with a decrease in intracellular iodide as determined by measuring intracellular (125)iodide and can be inhibited by specific blocking of pendrin. Elimination of the putative protein kinase A phosphorylation site T717A results in a diminished translocation to the membrane in response to forskolin. These results demonstrate that pendrin translocates to the membrane in response to TSH and suggest that it may have a physiological role in apical iodide transport and thyroid hormone synthesis. (Endocrinology 153: 512-521, 2012)

A reaction mechanism is the microscopic path by which reactants are transformed into products. Each step is an elementary reaction. In my other articles, you can also check out more blogs about 610-97-9. Category: iodides-buliding-blocks.

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. 60166-93-0, Name is Iopamidol, molecular formula is C17H22I3N3O8. In an article, author is Tsai, Wen-Ting,once mentioned of 60166-93-0, HPLC of Formula: C17H22I3N3O8.

Microwave-Assisted Copper-Catalyzed Cross-Coupling Reaction of Alkynes with Aryl Iodides and Vinyl Halides

The microwave-assisted, copper-catalyzed coupling of terminal alkynes with aryl iodides and vinyl halides is reported. In general, the reactions are completed in 10-30 min using 2-5 mol% [CuI(xantphos)] as a catalyst to provide the corresponding alkynes and enynes in good to excellent yields. A broad spectrum of aryl iodides, vinyl iodides, and bromides are coupled with aryl- and alkyl alkynes.

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In an article, author is Pavelka, S, once mentioned the application of 19094-56-5, Product Details of 19094-56-5, Name is 2-Chloro-5-iodobenzoic acid, molecular formula is C7H4ClIO2, molecular weight is 282.46, MDL number is MFCD00079731, category is iodides-buliding-blocks. Now introduce a scientific discovery about this category.

High bromide intake affects the accumulation of iodide in the rat thyroid and skin

The effect of a high bromide intake on the kinetics of iodide uptake and elimination in the thyroid and skin of adult male rats was studied. In rats fed a diet with sufficient iodine supply (> 25 mug I/d), the iodide accumulation in the skin predominated during the first hours after (131)I iodide application. From this organ, radioiodide was gradually transferred into the thyroid. A high bromide intake (> 150 mg Br(-)/d) in these animals led to a marked decrease in iodide accumulation, especially by the thyroid, because of an increase in iodide elimination both from the thyroid and from the skin. In rats kept under the conditions of iodine deficiency (< 1 muI/d), the iodide accumulation in the thyroid, but not in the skin, was markedly increased as a result of a thyrotropic stimulation. The effect of a high bromide intake (> 100 mg Br(-)/d) in these animals was particularly pronounced because the rates of iodide elimination were most accelerated both from their thyroid and from their skin.

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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 TAKENAKA, N, once mentioned the application of 144-48-9, Name is 2-Iodoacetamide, molecular formula is C2H4INO, molecular weight is 184.9637, MDL number is MFCD00008028, category is iodides-buliding-blocks. Now introduce a scientific discovery about this category, Formula: C2H4INO.

PARTIAL MOLAL VOLUMES OF UNI-UNIVALENT ELECTROLYTES IN METHANOL PLUS WATER .3. SODIUM-IODIDE AND POTASSIUM-IODIDE

Densities of methanol + water + sodium iodide and + potassium iodide were measured at 15, 25, 35, and 45-degrees-C. The apparent molal volumes of the electrolytes in these mixtures were calculated, and the apparent molol volumes at infinite dilution and partial molal thermal expansions were evaluated.

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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. 460-37-7, Name is 1,1,1-Trifluoro-3-iodopropane, molecular formula is C3H4F3I, belongs to iodides-buliding-blocks compound, is a common compound. In a patnet, author is Bernard, L, once mentioned the new application about 460-37-7, Computed Properties of C3H4F3I.

Gaseous species in mercuric iodide crystal growth ampoules

A thorough knowledge of vapor phase composition is necessary to control mercuric iodide crystal growth in closed ampoules. This phase involves mercuric iodide vapor and residual gases evolved from the starting material and from the wall of the ampoule. The mercuric iodide vapor pressure was measured from 333 to 453 K and the gaseous species were studied by mass spectrometry. Residual gases pressure versus material purity were measured by using a thermistor device.

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