Month: October 2022

Rong, Yu; Yang, Ruili; Yang, Yuzhe; Wen, Yazhou; Liu, Sixin; Li, Congfa; Hu, Zhuoyan; Cheng, Xiangrong; Li, Wu published the artcile< Structural characterization of an active polysaccharide of longan and evaluation of immunological activity>, HPLC of Formula: 3458-28-4, the main research area is longan pulp polysaccharide structure immunomodulatory activity signaling; Immunomodulatory activities; Longan polysaccharides; Signaling pathways; Structural features.

An active polysaccharide (LPD2) was isolated from longan pulp by comparing the effects of polysaccharides on the phagocytosis of macrophages. LPD2 was composed of arabinose, mannose, glucose, and galactose in a molar ratio of 0.25:0.49:1:0.5 with average mol. weight of 9.64 × 106 Da. The main linkages of the sugar residues of LPD2 were (1→4)-β-Glc and (1→6)-β-Man. LPD2 significantly enhanced the lymphocytes proliferation, phagocytosis and NO and IL-6 secretion by macrophage. The anti-TLR2 and anti-TLR4 mAbs markedly suppressed LPD2-mediated NO and IL-6 production Furthermore, anti-TLR4 or anti-TLR2 plus anti-TLR4 treatment significantly decreased LPD2-induced increase of MyD88, IRAK4, TRAF6 and INOS mRNA expression. Moreover, western blotting anal. showed that LPD2 enhanced the expression of target proteins in MyD88/IRAK4-TRAF6- INOS pathways. These results suggested that LPD2 induced macrophage activation partly via the TLR2- and TLR4-mediated MyD88/IRAK4-TRAF6 signaling pathways. Knowing the structural features and activities of active polysaccharide of longan gives the insights into longan polysaccharide application as an immunomodulatory agent.

Carbohydrate Polymers published new progress about Cell activation. 3458-28-4 belongs to class alcohols-buliding-blocks, and the molecular formula is C6H12O6, HPLC of Formula: 3458-28-4.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Li, Hao; Zhou, Musen; Sebastian, Jessalyn; Wu, Jianzhong; Gu, Mengyang published the artcile< Efficient force field and energy emulation through partition of permutationally equivalent atoms>, HPLC of Formula: 492-62-6, the main research area is efficient force field energy emulation partition permutationally equivalent atom.

Gaussian process (GP) emulator has been used as a surrogate model for predicting force field and mol. potential, to overcome the computational bottleneck of ab initio mol. dynamics simulation. Integrating both at. force and energy in predictions was found to be more accurate than using energy alone, yet it requires O((NM)3) computational operations for computing the likelihood function and making predictions, where N is the number of atoms and M is the number of simulated configurations in the training sample due to the inversion of a large covariance matrix. The high computational cost limits its applications to the simulation of small mols. The computational challenge of using both gradient information and function values in GPs was recently noticed in machine learning communities, whereas conventional approximation methods may not work well. Here, we introduce a new approach, the atomized force field model, that integrates both force and energy in the emulator with many fewer computational operations. The drastic reduction in computation is achieved by utilizing the naturally sparse covariance structure that satisfies the constraints of the energy conservation and permutation symmetry of atoms. The efficient machine learning algorithm extends the limits of its applications on larger mols. under the same computational budget, with nearly no loss of predictive accuracy. Furthermore, our approach contains an uncertainty assessment of predictions of at. forces and energies, useful for developing a sequential design over the chem. input space. (c) 2022 American Institute of Physics.

Journal of Chemical Physics published new progress about Algorithm. 492-62-6 belongs to class alcohols-buliding-blocks, and the molecular formula is C6H12O6, HPLC of Formula: 492-62-6.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Chaudhari, Anand Kumar; Singh, Vipin Kumar; Dwivedy, Abhishek Kumar; Das, Somenath; Upadhyay, Neha; Singh, Akanksha; Dkhar, Mumtaz S.; Kayang, Highland; Prakash, Bhanu; Dubey, Nawal Kishore published the artcile< Chemically characterized Pimenta dioica (L.) Merr. essential oil as a novel plant based antimicrobial against fungal and aflatoxin B1 contamination of stored maize and its possible mode of action>, Recommanded Product: 3,7-Dimethylocta-1,6-dien-3-ol, the main research area is Pimenta essential oil antimicrobial agent maize aflatoxin B1 contamination; Pimenta dioica essential oil; aflatoxin B1; ergosterol; lipid peroxidation; methylglyoxal; α-Terpineol.

The chem. characterization of P. dioica essential oil (PDEO) revealed the presence of 50 components, among which α-terpineol (30.31%) was the major component followed by β-linalool (6.75%) and γ-terpinene (4.64%). The oil completely inhibited the growth of aflatoxin B1-secreting strain Aspergillus flavus LHP-VS-8, and aflatoxin B1 production at 2.5 and 1.5μL/mL, resp. The oil caused dose-dependent reduction of methylglyoxal (an AFB1 inducer), enhanced leakage of Ca2+, Mg2+ and K+ ions, and significantly reduced the ergosterol content of the fungal plasma membrane. During in situ experiments, PDEO exhibited complete protection of fumigated maize cob slices from fungal infestation without affecting seed germination. The chem. characterized PDEO is recommended as a plant based preservative and shelf life enhancer of food commodities by preventing fungal growth, AFB1 production and lipid peroxidation This is the 1st report on PDEO as inhibitor of AFB1 secretion, and methylglyoxal biosynthesis.

Natural Product Research published new progress about Aspergillus flavus. 78-70-6 belongs to class alcohols-buliding-blocks, and the molecular formula is C10H18O, Recommanded Product: 3,7-Dimethylocta-1,6-dien-3-ol.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Di Berto Mancini, Marika; Del Gelsomino, Andrea; Di Stefano, Stefano; Frateloreto, Federico; Lapi, Andrea; Lanzalunga, Osvaldo; Olivo, Giorgio; Sajeva, Stefano published the artcile< Change of Selectivity in C-H Functionalization Promoted by Nonheme Iron(IV)-oxo Complexes by the Effect of the N-hydroxyphthalimide HAT Mediator>, Safety of Triphenylmethanol, the main research area is nonheme iron oxo complex hydroxyphthalimide hydrogen transfer hydrocarbon oxidation.

A kinetic anal. of the hydrogen atom transfer (HAT) reactions from a series of organic compounds to the iron(IV)-oxo complex [(N4Py)FeIV(O)]2+ and to the phthalimide N-oxyl radical (PINO) has been carried out. The results indicate that a higher activating effect of α-heteroatoms toward the HAT from C-H bonds is observed with the more electrophilic PINO radical. When the N-hydroxy precursor of PINO, N-hydroxyphthalimide (NHPI), is used as a HAT mediator in the oxidation promoted by [(N4Py)FeIV(O)]2+, significant differences in terms of selectivity have been found. Product studies of the competitive oxidations of primary and secondary aliphatic alcs. (1-decanol, cyclopentanol, and cyclohexanol) with alkylaroms. (ethylbenzene and diphenylmethane) demonstrated that it is possible to modify the selectivity of the oxidations promoted by [(N4Py)FeIV(O)]2+ in the presence of NHPI. In fact, alkylarom. substrates are more reactive in the absence of the mediator while alcs. are preferably oxidized in the presence of NHPI.

ACS Omega published new progress about Biomimetics. 76-84-6 belongs to class alcohols-buliding-blocks, and the molecular formula is C19H16O, Safety of Triphenylmethanol.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Ahmadi, Reza; Ebrahimzadeh, Mohammad Ali published the artcile< Resveratrol - A comprehensive review of recent advances in anticancer drug design and development>, Computed Properties of 501-36-0, the main research area is review resveratrol derivative cancer drug design development; Anticancer; Antitumor; Chemotherapy; Phytoalexin; Polyphenol; Resveratrol; Stilbenoid.

A review. Resveratrol is a natural polyphenolic stilbene isolated from various plants, foods and beverages with a broad spectrum of biol. and pharmacol. properties through modulating diverse targets and signaling pathways. Particularly, it has attracted a great deal of attention as a promising and multitarget anticancer agent due to its potential use in chemoprevention and chemotherapy of various tumors. However, unfavorable pharmacokinetics/pharmacodynamics profile such as poor bioavailability restricted its applications. Therefore, medicinal chemists have synthesized a lot of novel derivatives and analogs of resveratrol using different modification strategies to overcome these limitations and improve anticancer efficacy. Herein, we reviewed the design, synthesis, structure-activity relationship and mechanism of the most potent and privileged resveratrol-based compounds that showed promising anticancer activities in the last five years. We classified these compounds into the ten different categories based on their chem. structure similarities.

European Journal of Medicinal Chemistry published new progress about Antitumor agents. 501-36-0 belongs to class alcohols-buliding-blocks, and the molecular formula is C14H12O3, Computed Properties of 501-36-0.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Zeng, Lanting; Xiao, Yangyang; Zhou, Xiaochen; Yu, Jizhong; Jian, Guotai; Li, Jianlong; Chen, Jiaming; Tang, Jinchi; Yang, Ziyin published the artcile< Uncovering reasons for differential accumulation of linalool in tea cultivars with different leaf area>, Application In Synthesis of 78-70-6, the main research area is Camellia Tea Aroma Linalool oxide Leaf; Aroma; Camellia sinensis; Geranyl pyrophosphate (PubChem CID: 44134732).; Leaf area; Linalool; Linalool (PubChem CID: 6549); Linalool oxide; Tea; cis-linalool oxide (furaniod) (PubChem CID: 6428573); trans-linalool oxide (furaniod) (PubChem CID: 6431475).

It is generally proposed that tea cultivars with larger leaves contain more linalool, an important tea aroma contributor, than ones with smaller leaves. The objective of this study was to confirm the trait and explore the involved reason. Investigation on ten tea cultivars with different leaf areas demonstrated a significant pos. correlation between linalool content and leaf area (R2 = 0.739, p = 0.010). Anal. of metabolite and gene expression level showed that the transform ability of linalool into linalool oxides was the key factor. Feeding experiments that supplied tea leaves of different leaf areas with [2H3]linalool under different light conditions revealed that the larger tea leaves receive more light and are less capable of transformation of linalool to linalool oxides, thus leading to linalool accumulation. This information will advance understanding of the variation of linalool content in tea varieties and will provide assistance in breeding and screening of high-linalool tea cultivars.

Food Chemistry published new progress about Camellia sinensis. 78-70-6 belongs to class alcohols-buliding-blocks, and the molecular formula is C10H18O, Application In Synthesis of 78-70-6.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

St. Clair, Johnna Wellman; London, Erwin published the artcile< Effect of sterol structure on ordered membrane domain (raft) stability in symmetric and asymmetric vesicles>, Application of C27H44O, the main research area is sterol structure ordered membrane domain lipid raft stability; FRET; Lipid asymmetry; Liquid ordered; Steroid; Sterol.

Sterol structure influences liquid ordered domains in membranes, and the dependence of biol. functions on sterol structure can help identify processes dependent on ordered domains. In this study we compared the effect of sterol structure on ordered domain formation in sym. vesicles composed of mixtures of sphingomyelin, 1, 2-dioleoyl-sn-glycero-3-phosphocholine (DOPC) and cholesterol, and in asym. vesicles in which sphingomyelin was introduced into the outer leaflet of vesicles composed of DOPC and cholesterol. In most cases, sterol behavior was similar in sym. and asym. vesicles, with ordered domains most strongly stabilized by 7-dehydrocholesterol (7DHC) and cholesterol, stabilized to a moderate degree by lanosterol, epicholesterol and desmosterol, and very little if at all by 4-cholesten-3-one. However, in asym. vesicles desmosterol stabilized ordered domain almost as well as cholesterol, and to a much greater degree than epicholesterol, so that the ability to support ordered domains decreased in the order 7-DHC > cholesterol > desmosterol > lanosterol > epicholesterol > 4-cholesten-3-one. This contrasts with values for intermediate stabilizing sterols in sym. vesicles in which the ranking was cholesterol > lanosterol ∼ desmosterol ∼ epicholesterol or prior studies in which the ranking was cholesterol ∼ epicholesterol > lanosterol ∼ desmosterol. The reasons for these differences are discussed. Based on these results, we re-evaluated our prior studies in cells and conclude that endocytosis levels and bacterial uptake are even more closely correlated with the ability of sterols to form ordered domains than previously thought, and do not necessarily require that a sterol have a 3β-OH group.

Biochimica et Biophysica Acta, Biomembranes published new progress about Bilayer biological membrane. 434-16-2 belongs to class alcohols-buliding-blocks, and the molecular formula is C27H44O, Application of C27H44O.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Tamoradi, Taiebeh; Ghorbani-Choghamarani, Arash; Ghadermazi, Mohammad published the artcile< Immobilization of Pd(0) complex on the surface of SBA-15: A reusable catalyst for the synthesis of 5-substituted tetrazoles, sulfides and sulfoxides>, Product Details of C8H10OS, the main research area is tetrazole preparation sulfide sulfoxide preparation palladium complex catalyst.

A simple and efficient method for the synthesis of 5-substituted tetrazoles, sulfides and sulfoxides in the presence of Pd(0) complex immobilized on mesoporous SBA-15 as an efficient, recoverable and thermally stable mesostructure was reported. Also, the prepared mesostructure was characterized by Fourier transform IR spectroscopy, SEM, x-ray mapping, energy-dispersive x-ray spectroscopy, N2 adsorption and desorption, inductively coupled plasma optical emission spectroscopy and thermal gravimetric anal. Then, this mesostructured catalyst was applied in the synthesis of 5-substituted tetrazoles, sulfides and sulfoxides. The approach described here offers advantages such as short reaction times, high yield, purity yields, simple and eco- friendly, easy work-up. More importantly, this nanohybrid robust catalyst did not undergo metal leaching and applied several times without any decrease in catalytic activity.

Polyhedron published new progress about Aryl halides Role: RCT (Reactant), RACT (Reactant or Reagent). 699-12-7 belongs to class alcohols-buliding-blocks, and the molecular formula is C8H10OS, Product Details of C8H10OS.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Wakayama, Takanari; Ito, Yuki; Sakai, Kiyoshi; Miyake, Mio; Shibata, Eiji; Ohno, Hiroyuki; Kamijima, Michihiro published the artcile< Comprehensive review of 2-ethyl-1-hexanol as an indoor air pollutant>, Application In Synthesis of 104-76-7, the main research area is review indoor air pollutant; 2-ethyl-1-hexanol; emission mechanism; indoor air pollution; indoor concentration; sick building syndrome; volatile organic compounds.

A review. Objectives : 2-Ethyl-1-hexanol (2EH), a fragrance ingredient and a raw material for the production of plasticizer di(2-ethylhexyl) phthalate, is responsible for sick building syndrome (SBS). This review aims to clarify the 2EH characteristics as an indoor air pollutant such as indoor air concentration, emission mechanism, toxicity, and clin. effects. Methods : Scientific publications in English that has been made available on PubMed as of June 2018 and ad hoc publications in regional languages were reviewed. Results : Inhalation exposure to 2EH caused mucous membrane irritation in the eyes, nose, and throat in exptl. animals. Studies in human volunteers revealed an increase in olfactory irritation and eye discomfort. There has been increasing evidence of 2EH being present in indoor air in buildings. The primary sources of 2EH emissions are not building materials themselves, but instead the hydrolysis of plasticizers and flooring adhesives. In particular, compounds like di(2-ethylhexyl) phthalate present in polyvinyl chloride flooring materials are hydrolyzed upon contact with alk. moisture-containing concrete floors. That being said, it may be observed that indoor concentrations of 2EH increased every year during summer. Conclusions : Unlike other volatile organic compounds that cause SBS, 2EH can be retained in indoor air for long durations, increasing the likelihood of causing undesirable health effects in building occupants exposed to it. As a precautionary measure, it is important to use flooring materials that do not emit 2EH by hydrolysis, or to dry concrete before covering with flooring materials.

Journal of Occupational Health published new progress about Air. 104-76-7 belongs to class alcohols-buliding-blocks, and the molecular formula is C8H18O, Application In Synthesis of 104-76-7.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Guan, Ruqun; Jing, Lingyan; Zhang, Xiaoming; Chen, Shuai; Xue, Nan; Yang, Hengquan published the artcile< Microspherical nitrogen-doped carbon nanotube assembly derived from Pickering droplets>, SDS of cas: 6850-39-1, the main research area is microspherical nitrogen carbon nanotube Pickering droplet.

Carbon nanotube assemblies with controlled morphol. and tailored architecture offer great potentials for myriad applications, but strategies for their production have remained a significant challenge. Here, we proposed a novel and simple microconfined-annealing strategy, in which a Pickering microdroplet patterned method and unique pyrolysis-stimulated-transformation processes were coupled unprecedentedly, for the fabrication of spherical nitrogen-doped carbon nanotube assemblies (NCNTA). Based on this strategy, the as-prepared superstructures not only retained the micrometer-size and well-defined morphol. of the initial Pickering droplets, but also derived a hierarchical pomegranate-like structure where numerous interconnected NCNT particles were encapsulated by a carbon crust. More importantly, the interior architectures were shown to be manipulated through controlling synthesized parameters. Owing to the unique structure and composition of these assemblies, the yielded superstructures exhibited excellent performance and good recyclability in heterogeneous catalysis applications. This synthetic strategy provides new routes to access other micro- or macroscopic materials with novel structures and paves the way to expand their potential applications.

Carbon published new progress about Aminoplasts Role: CAT (Catalyst Use), PEP (Physical, Engineering or Chemical Process), SPN (Synthetic Preparation), USES (Uses), PROC (Process), PREP (Preparation). 6850-39-1 belongs to class alcohols-buliding-blocks, and the molecular formula is C6H13NO, SDS of cas: 6850-39-1.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts