Tag: 300-400

On July 31, 2021, Chaiyabutr, Chayada; Sukakul, Thanisorn; Kumpangsin, Titinun; Bunyavaree, Monthatip; Charoenpipatsin, Norramon; Wongdama, Supisara; Boonchai, Waranya published an article.Related Products of 6197-30-4 The title of the article was Ultraviolet filters in sunscreens and cosmetic products-A market survey. And the article contained the following:

As several reports have raised a variety of environmental, health, and safety issues related to UV filters, it is crucial to understand the trends in the exposure of the population to UV filters. To determine the frequency of UV filter usage in sunscreens and other cosmetic products in Thai market. We surveyed the UV filter labeling on sunscreens and cosmetic products sold in the Thai market. In all, 312 sunscreens and 1350 other cosmetic products were investigated. Titanium dioxide was the most frequently used UV filter in both sunscreens (66.7%) and other cosmetic products (68.4%). Ethylhexyl methoxycinnamate was the most common organic UVB filter, whereas Bu methoxydibenzoylmethane was the most common organic UVA filter. In sunscreens aimed at children, bis-ethylhexyloxyphenol methoxyphenyl triazine was the most commonly used UV filter. The most frequent co-occurrence of UV filters was titanium dioxide and ethylhexyl methoxycinnamate. Titanium dioxide was the most commonly used UV filter, which differs from the findings of previous surveys. Knowing the availability and frequency of each UV filter provides valuable information about consumer exposure levels, facilitates refinements of the allergen series in patch testing, and enhances the monitoring of adverse effects of UV filters. The experimental process involved the reaction of 2-Ethylhexyl 2-cyano-3,3-diphenylacrylate(cas: 6197-30-4).Related Products of 6197-30-4

The Article related to uv filter sunscreen cosmetic product market survey thailand, uv filters, cosmetics, market survey, sunscreens, ultraviolet, Essential Oils and Cosmetics: Skin Preparations and other aspects.Related Products of 6197-30-4

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

On May 1, 2016, Kowata, Keiko; Kojima, Naoshi; Komatsu, Yasuo published an article.Application of 79642-50-5 The title of the article was Development of a 3′-amino linker with high conjugation activity and its application to conveniently cross-link blunt ends of a duplex. And the article contained the following:

The 2-aminoethyl carbamate linker (ssH linker) exhibits high activity in modifying the 5′-termini of oligonucleotides; however, the ssH linker is not appropriate for 3′-terminal modification because it undergoes intramol. trans-acylation under heat-aqueous ammonia conditions. We developed an N-(2-aminoethyl)carbamate linker (revH linker), in which the carbamate is oriented in the reverse direction relative to that in 2-aminoethyl carbamate. The revH linker was tolerant to heat-alk. conditions and retained its high reactivity in conjugation with exogenous mols. The 3′-revH linker was efficiently linked with the 5′-ssH linker at the termini of complementary double strands with a bifunctional mol., producing a synthetic loop structure. An anti-microRNA oligonucleotide (AMO) was prepared from the chem. ligation of three-stranded 2′-O-Me RNAs, and the AMO with two alkyl loops exhibited high inhibition activity toward miRNA function. The revH linker is not only useful for 3′-terminal modification of oligonucleotides but also expands the utility range in combination with the 5′-ssH linker. The experimental process involved the reaction of Bis(2,5-dioxopyrrolidin-1-yl) glutarate(cas: 79642-50-5).Application of 79642-50-5

The Article related to microrna dna duplex preparation aminoethylcarbamate linker ligation, amino linker, cross-link, labeling, nucleic acids, oligonucleotides, anti-microrna, Carbohydrates: Nucleic Acid Chemical Synthesis and other aspects.Application of 79642-50-5

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

On November 21, 2019, Mishra, Rituraj; Singh, Maninder; Singh, Hanuman; Haridas, V.; Kurur, Narayanan D. published an article.Application of 227940-70-7 The title of the article was Revealing Signs and Hidden 1H NMR Coupling Constants in Three-Spin Systems Using Long-Lived Coherences. And the article contained the following:

Long-lived coherences (LLCs) in a pair of coupled protons have long lifetimes and hence decreased line width and increased spectral resolution Fourier transformation of the damped oscillatory decay of the LLC also provides coupling information on the spin system. In a three-spin system, unlike in the two-spin case, the peaks in an LLC spectrum are observed at combinations of the coupling constants This attribute is used to determine the relative signs of the coupling constants in weakly and strongly coupled model systems. In addition, it is shown that a coupling constant in a three-spin system that is unobservable in the 1H NMR spectrum, as is the case in bispidinone, a mol. of significance in peptidomimetics, may be determined from the LLC spectrum. The experimental process involved the reaction of tert-Butyl 7-benzyl-9-oxo-3,7-diazabicyclo[3.3.1]nonane-3-carboxylate(cas: 227940-70-7).Application of 227940-70-7

The Article related to nmr three spin coupling constant long lived coherence, Biochemical Methods: Spectral and Related Methods and other aspects.Application of 227940-70-7

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

On July 5, 2017, Huang, Hubiao; Sato, Hiroshi; Aida, Takuzo published an article.Application In Synthesis of Dimethyl 2′-amino-[1,1′:4′,1”-terphenyl]-4,4”-dicarboxylate The title of the article was Crystalline Nanochannels with Pendant Azobenzene Groups: Steric or Polar Effects on Gas Adsorption and Diffusion?. And the article contained the following:

An azobenzene-containing, zirconium-based metal-organic framework (AzoMOF), upon irradiation with UV light at 365 ± 10 nm, underwent trans-to-cis isomerization of its azobenzene pendants to furnish the cis-isomer content of 21% (AzoMOF21%) in 30 min at the photostationary state and underwent backward isomerization into AzoMOF1% upon either irradiation with visible light (420-480 nm) or heating. When the cis-isomer content increased, the diffusion rate and amount of CO2 adsorbed into the nanochannels of AzoMOF decreased considerably. When erythrosine B, a polarity-probing guest, was used, it showed a red shift upon exposure of AzoMOF20%⊃EB to visible light, indicating that the interior environment of AzoMOF turns less polar as the trans-isomer content becomes higher. In sharp contrast, the adsorption profiles of AzoMOF15% and AzoMOF1% for Ar having an analogous kinetic diameter to CO2 but no quadrupole moment and a smaller polarizability were virtually identical to one another. Therefore, it is likely that CO2 experiences a dominant effect of a polar effect rather than a steric effect in the crystalline nanochannels. The experimental process involved the reaction of Dimethyl 2′-amino-[1,1′:4′,1”-terphenyl]-4,4”-dicarboxylate(cas: 1312703-30-2).Application In Synthesis of Dimethyl 2′-amino-[1,1′:4′,1”-terphenyl]-4,4”-dicarboxylate

The Article related to zinc mof micropore gas adsorption crystal structure, Surface Chemistry and Colloids: Solid-Gas Systems and other aspects.Application In Synthesis of Dimethyl 2′-amino-[1,1′:4′,1”-terphenyl]-4,4”-dicarboxylate

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Haridas, V.; Yadav, Anita; Sharma, Sakshi; Pandey, Siddharth published an article in 2016, the title of the article was A tryptophan-containing fluorescent intramolecular complex as a designer peptidic proton sensor.Application In Synthesis of tert-Butyl 7-benzyl-9-oxo-3,7-diazabicyclo[3.3.1]nonane-3-carboxylate And the article contains the following content:

Pyrene and tryptophan groups judiciously placed on a novel mol. scaffold, namely, bispidine exhibited fluorescence due to the formation of an unprecedented emissive intramol. complex in polar solvents. Upon protonation, the emission signal from the pyrene unit enhances at the expense of the emission signal from the complex. The probe demonstrates good sensitivity, excellent selectivity, and adequate reversibility towards proton sensing. The present design based on the bispidine scaffold opens up newer opportunities for the design of novel bispidine-peptide sensors. The experimental process involved the reaction of tert-Butyl 7-benzyl-9-oxo-3,7-diazabicyclo[3.3.1]nonane-3-carboxylate(cas: 227940-70-7).Application In Synthesis of tert-Butyl 7-benzyl-9-oxo-3,7-diazabicyclo[3.3.1]nonane-3-carboxylate

The Article related to proton fluorescence probe bispidine peptide, Biochemical Methods: Spectral and Related Methods and other aspects.Application In Synthesis of tert-Butyl 7-benzyl-9-oxo-3,7-diazabicyclo[3.3.1]nonane-3-carboxylate

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

On March 25, 1983, Somekh, Lila; Shanzer, Abraham published an article.Application of 59524-07-1 The title of the article was Stereospecific synthesis of α,β-dehydroamino acids from β-hydroxy α-amino acid derivatives. And the article contained the following:

β-Amino acids I (R, R1 = H, H; Me, H; H, Me; CHMe2, H; H, CHMe2; R2 = CH2Ph, R3 = CO2CH2Ph; R, R1 = Me, H; H, Me; R2 = Et, R3 = CO2CMe3) underwent stereospecific dehydration by treatment with (diethylamino)sulfur trifluoride and pyridine in CH2Cl2 to give the corresponding unsaturated amino acids II. Threo isomers of I gave (Z)-II, whereas erythro isomers of I gave (E)-II. The experimental process involved the reaction of Benzyl 2-(((benzyloxy)carbonyl)amino)acrylate(cas: 59524-07-1).Application of 59524-07-1

The Article related to hydroxy amino acid dehydration stereospecific, unsaturated amino acid stereospecific synthesis, dehydroamino acid stereospecific synthesis, Amino Acids, Peptides, and Proteins: Amino Acids and other aspects.Application of 59524-07-1

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Natrajan, Anand; Wen, David published an article in 2015, the title of the article was A comparison of chemiluminescent acridinium dimethylphenyl ester labels with different conjugation sites.Reference of Bis(2,5-dioxopyrrolidin-1-yl) glutarate And the article contains the following content:

Chemiluminescent acridinium dimethylphenyl esters are highly sensitive labels that were used in automated assays for clin. diagnosis. Light emission from these labels and their conjugates is triggered by treatment with alk. peroxide. Conjugation of acridinium ester labels is normally done at the phenol. During the chemiluminescent reaction of these acridinium esters, the phenolic ester is cleaved and the light emitting acridone moiety is liberated from its conjugate partner. In the current study, the authors report the synthesis of three new acridinium esters with conjugation sites at the acridinium nitrogen and compare their properties with that of a conventional acridinium ester with a conjugation site at the phenol. The authors’ study is the first that provides a direct comparison of the emissive properties of acridinium dimethylphenyl esters (free labels and protein conjugates) with different conjugation sites, one where the light emitting acridone remains attached to its conjugate partner vs. conventional labeling which results in cleavage of the acridone from the conjugate. The authors’ results indicate that the conjugation at the acridinium nitrogen, which also alters how the acridinium ring and phenol are oriented with respect to the protein surface, has a minimal impact on emission kinetics and emission spectra. However, this mode of conjugation to three different proteins led to a significant increase in light yield which should be useful for improving the assay sensitivity. The experimental process involved the reaction of Bis(2,5-dioxopyrrolidin-1-yl) glutarate(cas: 79642-50-5).Reference of Bis(2,5-dioxopyrrolidin-1-yl) glutarate

The Article related to chemiluminescent acridinium dimethylphenyl ester label conjugation site protein, Biochemical Methods: Spectral and Related Methods and other aspects.Reference of Bis(2,5-dioxopyrrolidin-1-yl) glutarate

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

On April 5, 2011, Mealman, Tiffany D.; Bagai, Ireena; Singh, Pragya; Goodlett, David R.; Rensing, Christopher; Zhou, Hongjun; Wysocki, Vicki H.; McEvoy, Megan M. published an article.Reference of Bis(2,5-dioxopyrrolidin-1-yl) glutarate The title of the article was Interactions between CusF and CusB Identified by NMR Spectroscopy and Chemical Cross-Linking Coupled to Mass Spectrometry. And the article contained the following:

The Escherichia coli periplasmic proteins CusF and CusB, as part of the CusCFBA efflux system, aid in the resistance of elevated levels of copper and silver by direct metal transfer between the metallochaperone CusF and the membrane fusion protein CusB before metal extrusion from the periplasm to the extracellular space. Although previous in vitro experiments have demonstrated highly specific interactions between CusF and CusB that are crucial for metal transfer to occur, the structural details of the interaction have not been determined Here, the interactions between CusF and CusB are mapped through NMR spectroscopy and chem. crosslinking coupled with high-resolution mass spectrometry to better understand how recognition and metal transfer occur between these proteins. The NMR 1H-15N correlation spectra reveal that CusB interacts with the metal-binding face of CusF. In vitro chem. crosslinking with a 7.7 Å homobifunctional amine-reactive cross-linker, BS2G, was used to capture the CusF/CusB interaction site, and mass spectral data acquired on an LTQ-Orbitrap confirm the following two cross-links: CusF K31 to CusB K29 and CusF K58 to CusB K32, thus revealing that the N-terminal region of CusB interacts with the metal-binding face of CusF. The proteins transiently interact in a metal-dependent fashion, and contacts between CusF and CusB are localized to regions near their resp. metal-binding sites. The experimental process involved the reaction of Bis(2,5-dioxopyrrolidin-1-yl) glutarate(cas: 79642-50-5).Reference of Bis(2,5-dioxopyrrolidin-1-yl) glutarate

The Article related to interaction cusf cusb nmr spectroscopy crosslinking coupled mass spectrometry, Biochemical Methods: Spectral and Related Methods and other aspects.Reference of Bis(2,5-dioxopyrrolidin-1-yl) glutarate

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

On September 30, 2017, Stojko, Johann; Dupin, Adrien; Chaignepain, Stephane; Beaurepaire, Lionel; Vallet-Courbin, Amelie; Van Dorsselaer, Alain; Schmitter, Jean-Marie; Minvielle-Sebastia, Lionel; Fribourg, Sebastien; Cianferani, Sarah published an article.HPLC of Formula: 79642-50-5 The title of the article was Structural characterization of the yeast CF IA complex through a combination of mass spectrometry approaches. And the article contained the following:

The cleavage/polyadenylation factor IA (CF IA) is a yeast multiprotein complex that consists of Rna14, Rna15, Pcf11 and Clp1 proteins, and is involved in the 3′-end maturation of mRNAs. Structural data have been reported for the individual protein partners and binary complexes; however, little is known about the mol. architecture of the entire CF IA assembly. Here, we report a thorough characterization of complete recombinant CF IA assembly and its subcomplexes using a combination of mass spectrometry (MS) approaches. We first focused on the Rna14p:Rna15p and Pcf11p:Clp1p subcomplexes in order to obtain a detailed picture of their interactions. Native MS and crosslinking MS showed that the intact CF IA assembly exists in solution as pentameric and hexameric species, composed of two copies of Rna14p, one each of Pcf11p and Clp1p, and one or two of Rna15p, resp. Partial denaturation experiments followed by native MS along with crosslinking anal. revealed two building blocks: Rna14p:Rna15p multimer subcomplexes assemble with Pcf11p:Clp1p heterodimers to form the CF IA complex. We then used ion mobility-MS (IM-MS) to investigate the conformational changes induced upon CF IA assembly. The new information on the CF IA assembly process provided by this combination of MS approaches (native MS, crosslinking MS and IM-MS) allowed us to discuss a topol. model of the CF IA assembly. The experimental process involved the reaction of Bis(2,5-dioxopyrrolidin-1-yl) glutarate(cas: 79642-50-5).HPLC of Formula: 79642-50-5

The Article related to cleavage polyadenylation factor protein yeast ion mobility crosslinking, Biochemical Methods: Spectral and Related Methods and other aspects.HPLC of Formula: 79642-50-5

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

On August 17, 2016, Pagoto, Amerigo; Stefania, Rachele; Garello, Francesca; Arena, Francesca; Digilio, Giuseppe; Aime, Silvio; Terreno, Enzo published an article.HPLC of Formula: 79642-50-5 The title of the article was Paramagnetic Phospholipid-Based Micelles Targeting VCAM-1 Receptors for MRI Visualization of Inflammation. And the article contained the following:

Inflammation is signaled by the overexpression of epitopes on the vascular endothelium that primarily aim at recruiting immune cells into the inflamed area. The intravascular localization of these biomarkers makes them suitable targets for the MRI visualization of inflammation. Phospholipid-based nanosystems appear excellent candidates in virtue of their good biocompatibility, ability to deliver a high number of imaging units at the target site, and for the easy functionalization with targeting vectors. In this work, phospholipid-based micelles (hydrodynamic diameter of 20 nm) loaded with the amphiphilic Gd(III)-complex Gd-DOTAMA(C18)2 were vectorized with a small peptide able to specifically bind VCAM-1 receptors. The micelles displayed a high longitudinal relaxivity (36.4 s-1mmolGd-1 at 25 °C and 0.7 T). A 1H- and 17O-water relaxometry study indicated that the paramagnetic complex embedded in the nanoparticles adopted two isomeric conformations, likely reflecting the well-known square antiprismatic (SAP) and twisted square antiprismatic (TSAP) configurations typically observed in DOTA-like lanthanide complexes. Interestingly, the TSAP structure, showing a much faster exchange rate for the water mol. coordinated to the metal ion, was the most abundant, thus explaining the high relaxivity of the micellar agent. The systemic administration of the micelles into a lipopolysaccharide-induced murine model of acute inflammation successfully demonstrated the ability of the targeting agents to detect the diseased area by T1 contrast enhanced MRI. The experimental process involved the reaction of Bis(2,5-dioxopyrrolidin-1-yl) glutarate(cas: 79642-50-5).HPLC of Formula: 79642-50-5

The Article related to paramagnetic phospholipid micelle vcam1 receptor mri inflammation, Biochemical Methods: Spectral and Related Methods and other aspects.HPLC of Formula: 79642-50-5

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics