Month: December 2022

Gao, Xianli published the artcileEnhancing selenium and key flavor compounds contents in soy sauce using selenium-enriched soybean, Recommanded Product: 3-(Methylthio)propan-1-ol, the main research area is soybean soy sauce selenium flavor.

Selenium (Se) deficiency has become a global health threat. Se-enriched soybean was utilized to develop a Se-enriched soy sauce (SeSS), and the effects of Se-enriched soybean on the flavor compounds in SeSS were characterized with HPLC and SPME-GC-olfactometry/MS. Results showed that the contents of total selenium (11.1-fold), organic selenium (10.6-fold), small peptides (≤1 kDa, 25.4%), free amino acids (FAAs, 8.67%) and 22 aroma-active compounds in SeSS were significantly enhanced when compared to soy sauce prepared using ordinary soybean (SS, p < 0.05). Only the contents of 4-vinylguaiacol and acetic acid in SeSS were decreased by 30.5% and 17.7%. Further investigations found that Se-enriched soybean markedly enhanced the activities of acidic and alk. proteases in the koji and moromi (p < 0.05), which made more proteins and large peptides degrade into small peptides, sweet and bitter FAAs. Se-enriched soybean moromi promoted the reproduction of aroma-producing Lactobacillus plantarum and Zygosaccharomyces rouxii, and more aroma-active compounds were detected in SeSS. 4-Vinylguaiacol was reduced to 4-ethylguaiacol by L. plantarum and acetic acid was converted into acetate via esterification. The work developed a widely accessible selenium supplement and a novel method to improve the flavor of soy sauce. Journal of Food Composition and Analysis published new progress about Alcohols Role: ANT (Analyte), BSU (Biological Study, Unclassified), FFD (Food or Feed Use), ANST (Analytical Study), BIOL (Biological Study), USES (Uses). 505-10-2 belongs to class alcohols-buliding-blocks, name is 3-(Methylthio)propan-1-ol, and the molecular formula is C4H10OS, Recommanded Product: 3-(Methylthio)propan-1-ol.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Wang, Jiatong published the artcileInsights into crucial odourants dominating the characteristic flavour of citrus-white teas prepared from citrus reticulata Blanco ‘Chachiensis’ and Camellia sinensis ‘Fudingdabai’, HPLC of Formula: 124-76-5, the main research area is Citrus Camellia white tea odorant flavor; Aroma quantification; Characterized odourants; Citrus-white tea; Odour activity value; SBSE-GC-O/MS.

Citrus-white teas (CWs), which possess a balanced flavor of tea and citrus, are becoming more popular worldwide; however, their characteristic flavor and odourants received limited research. Volatile components of two types of CWs prepared from Citrus reticulata Blanco’Chachiensis’ and Camellia sinensis ‘Fudingdabai’ were comprehensively investigated using a combination of stir bar sorptive extraction and gas chromatog.-mass spectrometry (GC-MS). Ninety-nine crucial odourants in the CWs were quantified by applying GC-olfactometry/MS, significant differences were compared, and their odor activity values (OAVs) were calculated Twenty-two odourants (in total 2628.09 and 1131.18 mg/kg resp.) were further confirmed as traditional CW (CW-A) and innovated CW (CW-B) characteristic flavor crucial contributors which all possessed > 1 OAVs, particularly limonene (72919 in CW-A) and trans-β-ionone (138953 in CW-B). The unravelling of CWs aroma composition will greatly expanding our understanding of tea aroma chem. and the potential aroma interactions will offer insights into tea blending technologies.

Food Chemistry published new progress about Alcohols Role: ANT (Analyte), BSU (Biological Study, Unclassified), FFD (Food or Feed Use), ANST (Analytical Study), BIOL (Biological Study), USES (Uses). 124-76-5 belongs to class alcohols-buliding-blocks, name is rel-(1R,2R,4R)-1,7,7-Trimethylbicyclo[2.2.1]heptan-2-ol, and the molecular formula is C10H18O, HPLC of Formula: 124-76-5.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Cui, Hui-Ya published the artcileEngineering noble-metal-free metal-organic framework composite catalyst for efficient CO2 conversion under ambient conditions, COA of Formula: C8H14O, the main research area is copper bromide zeolite catalyst CO2 propargylamine propargyl alc cycloaddition.

The cyclization of propargylic alcs. and propargylic amines with CO2 are of great significance since the generated O/N-containing cyclic skeletons are extensively employed in pharmaceutical chem. and industrial production However, most of the reported catalysts only effectively catalyze propargylic alcs. or propargylic amines with CO2, and often involve noble-metal catalysts, high temperature and CO2 pressure. It is a great challenge that non-noble-metal catalysts catalyzed both propargylic alcs. and propargylic amines with CO2 under ambient conditions. Herein, CuBr@NH2-MIL-101 was successfully synthesized by loading CuBr nanoparticles into zeolite-type NH2-MIL-101 via simple thermal conversion method, and it displayed highly selective CO2 uptake properties. Importantly, CuBr@NH2-MIL-101 featured high catalytic activity for carboxylative cyclization of both propargylic alcs. and propargylic amines with CO2 under ambient conditions (25°C, 0.1 MPa CO2), resp. Moreover, CuBr@NH2-MIL-101 can be recycled at least three times without significant decline in catalytic activity. The combination explorations of NMR, FTIR and 13C isotope labeling experiments clearly illustrate the reaction process and mechanism. The d. functional theory (DFT) calculations uncover that CuBr and 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU) can synergistically activate substrates, and the proton-demetalation step with the highest energy barrier was the rate-determining step in two catalytic systems. To our knowledge, it is the first report of noble-metal-free catalyst that can simultaneously catalyze CO2 conversion with propargylic alcs. and propargylic amines under room temperature and atm. CO2 pressure.

Chemical Engineering Journal (Amsterdam, Netherlands) published new progress about Amines, propargyl Role: PEP (Physical, Engineering or Chemical Process), PRP (Properties), RCT (Reactant), PROC (Process), RACT (Reactant or Reagent). 107-54-0 belongs to class alcohols-buliding-blocks, name is 3,5-Dimethylhex-1-yn-3-ol, and the molecular formula is C8H14O, COA of Formula: C8H14O.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Wendeln, Christian published the artcileCarbohydrate Microarrays by Microcontact Printing, Synthetic Route of 87905-98-4, the main research area is carbohydrate microarray microcontact printing.

This Article describes the preparation of carbohydrate microarrays by the immobilization of carbohydrates via microcontact printing (μCP) on glass and silicon substrates. To this end, diene-modified carbohydrates (galactose, glucose, mannose, lactose, and maltose) were printed on maleimide-terminated self-assembled monolayers (SAMs). A Diels-Alder reaction occurred exclusively in the contact area between stamp and substrate and resulted in a carbohydrate pattern on the substrate. It was found that cyclopentadiene-functionalized carbohydrates could be printed within minutes at room temperature, whereas furan-functionalized carbohydrates required long printing times and high temperatures By successive printing, microstructured arrays of up to three different carbohydrates could be produced. Immobilization and patterning of the carbohydrates on the surfaces was investigated with contact angle measurements, XPS, time-of-flight secondary ion mass spectrometry (TOF-SIMS), and fluorescence microscopy. Furthermore, the lectins Con A (ConA) and peanut agglutinin (PNA) bind to the microarrays, and the printed carbohydrates retain their characteristic selectivity toward these proteins.

Langmuir published new progress about Carbohydrates Role: ARG (Analytical Reagent Use), BUU (Biological Use, Unclassified), PEP (Physical, Engineering or Chemical Process), RCT (Reactant), SPN (Synthetic Preparation), TEM (Technical or Engineered Material Use), ANST (Analytical Study), USES (Uses), BIOL (Biological Study), PROC (Process), RACT (Reactant or Reagent), PREP (Preparation) (diene-modified). 87905-98-4 belongs to class alcohols-buliding-blocks, name is Benzyl (5-hydroxypentyl)carbamate, and the molecular formula is C13H19NO3, Synthetic Route of 87905-98-4.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Patel, Twinkal published the artcileSelf-Healable Reprocessable Triboelectric Nanogenerators Fabricated with Vitrimeric Poly(hindered Urea) Networks, SDS of cas: 7575-23-7, the main research area is self healing triboelec nanogenerator vitrimeric poly hindered urea network; dynamic bulky urea chemistry; interfacial polarization; poly(hindered urea); reprocessability; self-healing; triboelectric device.

In recent years, the advent of highly deformable and healable electronics is exciting and promising for next-generation electronic devices. In particular, self-healable triboelec. nanogenerators (SH-TENGs) serve as promising candidates based on the combination of the triboelec. effect, electrostatic induction, and self-healing action. However, the majority of SH-TENGs were devised with weak polymeric networks that are healed with reversible supramol. interactions or disulfides, thus resulting in poor mech. properties and low resistance to creeping. To address this issue, the authors demonstrate the integration of mech. strong and self-healable poly(hindered urea) (PHU) network in the fabrication of effective TENGs. The designed PHU network is flexible but shows greater mech. property of tensile strength ≤1.7 MPa at break. The network is capable of self-healing quickly and repeatedly as well as being reprocessable under mild conditions, enabling the recovery of triboelec. performances after the complete healing of the damaged surfaces. Also, the interfacial-polarization-induced enhancement of dielec. constant endows SH-TENG with the highest triboelec. output performance (169.9 V/cm2) among the reported healable TENGs. This work presents an avenue to the development of mech. energy-harvesting devices and self-powered sensors with excellent stretchability, high recoverability, and good mech. strength.

ACS Nano published new progress about Triboelectric nanogenerators. 7575-23-7 belongs to class alcohols-buliding-blocks, name is Pentaerythritol tetra(3-mercaptopropionate), and the molecular formula is C17H28O8S4, SDS of cas: 7575-23-7.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Packiaraj, S. published the artcileDifferent coordination geometries of lighter lanthanates driven by the symmetry of guanidines as charge compensators, Synthetic Route of 110-99-6, the main research area is crystal structure guanidinium lanthanide thiodiacetate oxydiacetate preparation luminescence.

Two new related families (GunH)3[Ln(tda)3] I and (AgunH)3[Ln(oda)3]·H2O II (Ln = La, Ce, Pr, Nd and Sm, H2tda = thiodiacetic acid, H2oda = oxydiacetic acid, GunH = guanidinium, AgunH = aminoguanidinium) were successfully synthesized using a controlled process under oil-bath conditions (at 120° for a day) and characterized by various physicochem. techniques. The structures were solved for Pr and Nd in I and for La in II, resp., from x-ray diffraction data of single crystals. The isostructural complexes of (GunH)3[Pr(tda)3] and (GunH)3[Nd(tda)3] crystallize in the hexagonal crystal system with space group P6̅2c, while (AgunH)3[La(oda)3]·H2O has a triclinic symmetry with the P1̅ space group. Generally, coordination number 6 (octahedral) and 4 (tetrahedral) structures are very rare except when bulky ligands are present. Typically, the thiodiacetate (O,S,O) and oxydiacetate (O,O,O) anions act as tridentate ligands to create monomeric structures. Surprisingly, for the 1st time, the thiodiacetate anion takes a somewhat rare bidentate (O,O) mode, leading to trigonal prismatic geometry around the metal ion even for a flexible ligand, whereas the oxydiacetate dianion (oda2-) acquires the usual nine coordinated distorted monocapped square anti-prismatic (MSAP) geometry. The simultaneous TG-DTA I complexes could not be recorded due to spurting, while the type II compounds show smooth and similar thermal behavior on heating. The photoluminescent properties of I and II were studied at room temperature, which indicate that the emissions come from intra-ligand π-π* transitions.

New Journal of Chemistry published new progress about Crystal structure. 110-99-6 belongs to class alcohols-buliding-blocks, name is 2,2′-Oxydiacetic acid, and the molecular formula is C4H6O5, Synthetic Route of 110-99-6.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Fujii, Kahori published the artcilePhysical characterization of meso-erythritol as a crystalline bulking agent for freeze-dried formulations, HPLC of Formula: 64519-82-0, the main research area is meso erythritol crystal filler freeze drying cooling crystallization.

The purpose of this study was to identify and characterize new crystalline bulking agents applicable to freeze-dried pharmaceuticals. Thermal anal. of heat-melt sugar and sugar alc. solids as well as their frozen aqueous solutions showed high crystallization propensity of meso-erythritol and d-mannitol. Exptl. freeze-drying of the aqueous meso-erythritol solutions after their cooling by two different methods (shelf-ramp cooling and immersion of vials into liquid nitrogen) resulted in cylindrical crystalline solids that varied in appearance and microscopic structure. Powder X-ray diffraction and thermal anal. indicated different crystallization processes of meso-erythritol depending on the extent of cooling. Cooling of the frozen meso-erythritol solutions at temperatures lower than their Tg’ (glass transition temperature of maximally freeze-concentrated phase, -59.7°C) induced a greater number of nuclei in the highly concentrated solute phase. Growth of multiple meso-erythritol anhydride crystals at around -40°C explains the powder-like fine surface texture of the solids dried after their immersion in liquid nitrogen. Contrarily, shelf-ramp cooling of the frozen solution down to -40°C induced an extensive growth of the solute crystal from a small number of nuclei, leading to scale-like patterns in the dried solids. An early transition of the freezing step into primary drying induced collapse of the non-crystalline region in the cakes. Appropriate process control should enable the use of meso-erythritol as an alternative crystalline bulking agent in freeze-dried formulations.

Chemical & Pharmaceutical Bulletin published new progress about Carbohydrates Role: PEP (Physical, Engineering or Chemical Process), PRP (Properties), THU (Therapeutic Use), PROC (Process), BIOL (Biological Study), USES (Uses). 64519-82-0 belongs to class alcohols-buliding-blocks, name is (3R,4R,5R)-6-(((2S,3R,4S,5S,6R)-3,4,5-Trihydroxy-6-(hydroxymethyl)tetrahydro-2H-pyran-2-yl)oxy)hexane-1,2,3,4,5-pentaol, and the molecular formula is C12H24O11, HPLC of Formula: 64519-82-0.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Rezaei, Farzad published the artcilePolymeric encapsulation of liquids via plasma surface polymerization, Application of Pentaerythritol tetra(3-mercaptopropionate), the main research area is plasma surface polymerization polymer encapsulation.

This study introduces a new approach of liquid encapsulation using an atm. pressure plasma (APP). The technique is similar to interfacial polymerization, though here one phase is liquid (that contains unsaturated C=C bonds) and the other phase is plasma (that contains free radicals). When combined, the atm. plasma can induce surface polymerization of an acrylate-based liquid, resulting in a thin polymeric skin on top of the liquid Measurements with an at. force microscope and a spectroscopic ellipsometer estimate the thickness of the skin formed on top of di(ethylene glycol) diacrylate to be 40-50 nm. To demonstrate an application of this method, we encapsulated hemispherical capsules of reactive adhesives on a glass substrate. These adhesives are based on thiol-acrylate and thiol-acrylate-epoxy systems that react in the presence of a strong base catalyst. Plasma-induced polymerization can encapsulate, immobilize, and isolate sep. droplets of resin and the catalyst in a latent (nonreactive) state. These capsules remain latent until they rupture in response to phys. contact. A tensile testing machine reports an adhesive strength of ∼ 2 MPa for the formulated resins after curing. The capsules reported here may be useful for storing functional liquids for just-in-time release, such as contact-sensitive adhesives, on-demand lubricants, or self-healing agents.

Journal of Applied Polymer Science published new progress about Adhesion, physical. 7575-23-7 belongs to class alcohols-buliding-blocks, name is Pentaerythritol tetra(3-mercaptopropionate), and the molecular formula is C17H28O8S4, Application of Pentaerythritol tetra(3-mercaptopropionate).

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

McFetridge, Janet published the artcileInfluence of hydrogenated starch hydrolysates on the glass transition and crystallisation of sugar alcohols, SDS of cas: 64519-82-0, the main research area is isomalt lactitol starch glass transition crystallization.

Low and high mol. weight hydrogenated starch hydrolyzates (HSH) were added to amorphous isomalt and lactitol, and the glass transition temperature (Tg) and crystallization behavior was monitored during storage at 80% relative humidity. Prior to storage, only one Tg was detected in all the binary mixtures when scanned in the differential scanning calorimetry and the Tg was in the temperature range between the Tg of the individual components. When the amorphous samples were stored in humid conditions, more than one Tg were detected. The Tg at the lowest temperature rapidly decreased during storage as the moisture uptake increased but then stabilized at approx. -40°. The maximum moisture uptake of the samples was 40% (weight/weight) and resulted in the formation of a transparent viscous solution Eventually crystallization was observed It was found that both the low and the high mol. weight HSH reduced the crystallization of isomalt, but the low mol. HSH was the most effective.

Food Research International published new progress about Crystallization. 64519-82-0 belongs to class alcohols-buliding-blocks, name is (3R,4R,5R)-6-(((2S,3R,4S,5S,6R)-3,4,5-Trihydroxy-6-(hydroxymethyl)tetrahydro-2H-pyran-2-yl)oxy)hexane-1,2,3,4,5-pentaol, and the molecular formula is C12H24O11, SDS of cas: 64519-82-0.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Ji, Xiaolong published the artcileAn acidic polysaccharide from Ziziphus Jujuba cv. Muzao: Purification and structural characterization, Category: alcohols-buliding-blocks, the main research area is acidic polysaccharide Ziziphus purification structure; Characterization; Polysaccharide; Purification; Ziziphus Jujuba cv. Muzao.

A novel acidic polysaccharide fraction (PZMP2-2) was isolated from Ziziphus Jujuba cv. Muzao fruit via hot water extraction and purified by DEAE-Sepharose FF and Sephacryl S-300 column chromatog. PZMP2-2 consisted of rhamnose, arabinose, xylose, galactose, and galacturonic acid in a ratio of 1.18: 5.23: 0.22: 2.68: 2.20, with a mol. weight of 62.73 kDa. Structural features of PZMP2-2 were investigated using FT-IR, SEM, AFM, GC-MS anal. and NMR spectroscopy. Methylation and GC-MS anal. revealed that the main glycosidic bonds in PZMP2-2 comprised 1-linked Galp, 1,3-linked Araf, 1,2,4-linked Rhap, 1,3-linked Galp, 1,4-linked GalpA and 1,3,5-linked Araf. NMR anal. indicate that PZMP 2-2 has a linear backbone of (1 → 4)-linked GlcpA and (1 → 2,4)-linked Rhap residues, with branches at the O-4 position, consisting of Araf and Galp residues.

Food Chemistry published new progress about Liquid chromatography. 59-23-4 belongs to class alcohols-buliding-blocks, name is (2R,3S,4S,5R)-2,3,4,5,6-Pentahydroxyhexanal, and the molecular formula is C6H12O6, Category: alcohols-buliding-blocks.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts