Month: October 2022

Su, Nana;Ye, Ziyang;Li, Jinglei;Yang, Liuqing;Hou, Guohua;Ye, Ming published 《Effect of the addition of roselle (Hibiscus sabdariffa L.) extracts on the rheological, textural, and antioxidant activity of fermented milks》. The research results were published in《Flavour and Fragrance Journal》 in 2020.Category: alcohols-buliding-blocks The article conveys some information:

The study aims to evaluate the rheol., textural, and antioxidant activity of fermented milks with the addition of roselle (Hibiscus sabdariffa L.) extracts at concentrations of 0.0, 0.1, 0.2, and 0.3% (CFM, RFM₁, RFM₂, and RFM₃). The chem. composition of the fermented milks, including crude protein, fat, ash, total solids and non-fat solids, were also determined Gas chromatog.-mass spectroscopy (GC-MS) detected 42, 46, 47, and 49 kinds of volatile flavor compounds in CFM, RFM₁, RFM₂, and RFM₃, resp. The antioxidant activity of fermented milks was measured using ferric reducing antioxidant power and scavenging capacities for 2,2-diphenyl-1-picrylhydrazyl (DPPH) and 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) radicals during 28 days of refrigerated storage. The results of this study are of great significance to improve the understanding and application of roselle extracts in the food industry. Both roselle and fermented milk are beneficial to human health, with many biol. activities, such as antioxidant, hypoglycemic, liver-protecting, and antihypertensive properties; however, no attention has been paid to the combined effects of roselle and fermented milks. The study created a novel fermented milk and the results indicate that 0.3% roselle extracts can play the most important role in affecting the rheol., textural properties, and antioxidant activity of fermented milks, so this modification of fermented milk shows promise for potential application in the food industry. To complete the study, the researchers used 2,5-Dimethyl-2,5-hexanediol (cas: 110-03-2) .

2,5-Dimethyl-2,5-hexanediol(cas:110-03-2) is used as an intermediate in the preparation of 2.5-Dimethyl-2.5-bis(tertbutyl-peroxy)hexane. It is also used in the synthesis of six- and seven-membered heterocyclic boron compounds.Category: alcohols-buliding-blocks

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Song, Xue-Chao;Canellas, Elena;Dreolin, Nicola;Goshawk, Jeff;Nerin, Cristina published 《A Collision Cross Section Database for Extractables and Leachables from Food Contact Materials》 in 2022. The article was appeared in 《Journal of Agricultural and Food Chemistry》. They have made some progress in their research.Electric Literature of C23H32O2 The article mentions the following:

The chems. in food contact materials (FCMs) can migrate into food and endanger human health. In this study, we developed a database of traveling wave collision cross section in nitrogen (^TWCCS_N2) values for extractables and leachables from FCMs. The database contains a total of 1038 ^TWCCS_N2 values from 675 standards including those commonly used additives and nonintentionally added substances in FCMs. The ^TWCCS_N2 values in the database were compared to previously published values, and 85.7, 87.7, and 64.9% [M + H]⁺, [M + Na]⁺, and [M – H]^– adducts showed deviations <2%, with the presence of protomers, post-ion mobility spectrometry dissociation of noncovalent clusters and inconsistent calibration are possible sources of CCS deviations. Our exptl. ^TWCCS_N2 values were also compared to CCS values from three prediction tools. Of the three, CCSondemand gave the most accurate predictions. The ^TWCCS_N2 database developed will aid the identification and differentiation of chems. from FCMs in targeted and untargeted anal. And 2,2-Methylenebis(6-tert-butyl-p-cresol) (cas: 119-47-1) was used in the research process.

Electric Literature of C23H32O22,2′-Methylenebis(4-methyl-6-tert-butylphenol)(CAS: 119-47-1) is a natural product found in Streptomyces and Aspergillus fumigatus .

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Pankow, Robert M.;Ye, Liwei;Thompson, Barry C. published 《Influence of the Ester Directing Group on the Inhibition of Defect Formation in Polythiophenes with Direct Arylation Polymerization (DArP)》. The research results were published in《Macromolecules (Washington, DC, United States)》 in 2020.Recommanded Product: 2-Hexyl-1-decanol The article conveys some information:

Direct arylation polymerization (DArP) has allowed for the facile preparation of a variety of conjugated polymer architectures. Since DArP proceeds through a C-H activation pathway, the selectivity of only the desired C-H bond for certain monomers has remained a challenge. Low selectivity for the desired C-H bond can lead to the introduction of various structural defects. The development of conditions through the use of additives, screening and design of phosphine ligands, as well as precatalysts has provided condition sets that work for some monomers to afford the desired polymers with a minimization of defects. In addition to modifying the conditions, another handle for tuning the site selectivity for C-H activation is through the introduction of a directing group, such as an ester. Ester functionalized conjugated polymers have gone through a renaissance of sorts where the inclusion of this functionality on thiophene based monomers has garnered increased attention. To understand how this functionality can be exploited as a directing-group for DArP, we study the formation of defects for poly(3-hexylesterthiophene-2,5-diyl) (P3HET) and select structural analogs. We develop optimized conditions that allow for the synthesis of this polymer with improved mol. weight (M_n) (up to 15.9 vs. 11.7 kDa) and regioregularity (up to >99% vs. 96%) in a shorter polymerization time (16 vs. 48 h). Based on extensive defect anal. using ¹H NMR spectroscopy we rationally design a monomer for the synthesis of the donor-acceptor polymer poly(2-Hexyldecyl [2,2′-bithiophene]-4-carboxylate -5,5′-diyl) (P3HDET-T) with good M_n (26.2 kDa) and regioregularity (>99%). This study shows how the inclusion of ester directing groups and the formulation of pathways for defect formation can enable the rational design of monomers yielding conjugated polymers with improved M_n and rr.2-Hexyl-1-decanol (cas: 2425-77-6) were involved in the experimental procedure.

2-Hexyl-1-decanol(cas: 2425-77-6) is a branched alcohol. It is one of the constituent of the essential oil, extracted from the roots of Adiantum flabellulatum. Recommanded Product: 2-Hexyl-1-decanol

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Marchetti, Sara;Mollerup, Steen;Gutzkow, Kristine Bjerve;Rizzi, Cristiana;Skuland, Tonje;Refsnes, Magne;Colombo, Anita;Oevrevik, Johan;Mantecca, Paride;Holme, Joern Andreas published 《Biological effects of combustion-derived particles from different biomass sources on human bronchial epithelial cells》. The research results were published in《Toxicology In Vitro》 in 2021.Computed Properties of C23H32O2 The article conveys some information:

Combustion-derived particles (CDPs), in particular from traffic, are regarded as a central contributor for adverse health effects linked to air pollution. Recently, also biomass burning has been recognized as an important source for CDPs. Here, the effects of CDPs (PM10) originating from burning of pellet, charcoal and wood on key processes associated to lung carcinogenesis were explored. Human bronchial epithelial cells (HBEC3-KT) were exposed to 2.5μg/cm2 of CDPs for 24 h and biol. effects were examined in terms of cytotoxicity, inflammation, epithelial to mesenchymal transition (EMT)-related effects, DNA damage and genotoxicity. Reduced cell migration, inflammation and modulation of various PM-associated genes were observed mainly after exposure to wood and pellet. In contrast, only particles from pellet burning induced alteration in cell proliferation and DNA damage, which resulted in cell cycle alterations. Charcoal instead, appeared in general less effective in inducing pro-carcinogenic effects. These results illustrate differences in the toxicol. profile due to the CDPs source. The different chem. compounds adsorbed on CDPs seemed to be central for particle properties, leading to an activation of various cellular signaling pathways involved in early steps of cancer progression. The experimental procedure involved many compounds, such as 2,2-Methylenebis(6-tert-butyl-p-cresol) (cas: 119-47-1) .

Computed Properties of C23H32O22,2′-Methylenebis(4-methyl-6-tert-butylphenol)(CAS: 119-47-1) is a natural product found in Streptomyces and Aspergillus fumigatus .

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COA of Formula: C8H18O2《Facile synthesis of macrocyclic tetrazoles by regioselective cycloalkylation of bistetrazoles with 2,5-dimethylhexane-2,5-diol in perchloric acid》 was published in 2012. The authors were Voitekhovich, Sergei V.;Lyakhov, Alexander S.;Ivashkevich, Ludmila S.;Gaponik, Pavel N., and the article was included in《Tetrahedron Letters》. The author mentioned the following in the article:

Alkylation of 1,5-bis(tetrazol-5-yl)-3-oxapentane with 2,5-dimethylhexane-2,5-diol in 65% aqueous perchloric acid was found to proceed selectively on the N2 atoms of both tetrazole rings generating a 15-membered macrocycle with tetrazol-2,5-diyl moieties incorporated (yield ca. 80%). Under analogous alkylation conditions 1,5-bis(1-methyltetrazol-5-yl)-3-oxapentane undergoes quaternization resulting in a macrocyclic tetrazolium perchlorate containing two 1-methyltetrazolium-3,5-diyl units linked by 3-oxapentane-1,5-diyl and 2,5-dimethylhexane-2,5-diyl bridges. Crystal structures of the macrocyclic compounds obtained, determined by single crystal X-ray anal., are described. To complete the study, the researchers used 2,5-Dimethyl-2,5-hexanediol (cas: 110-03-2) .

2,5-Dimethyl-2,5-hexanediol(cas:110-03-2) was used in the synthesis of six- and seven-membered heterocyclic boron compounds containing intramolecular N-B bond.COA of Formula: C8H18O2

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Bi, Pengqing;Ren, Junzhen;Zhang, Shaoqing;Wang, Jianqiu;Chen, Zhihao;Gao, Mengyuan;Cui, Yong;Zhang, Tao;Qin, Jinzhao;Zheng, Zhong;Ye, Long;Hao, Xiaotao;Hou, Jianhui published 《Low-cost and high-performance poly(thienylene vinylene) derivative donor for efficient versatile organic photovoltaic cells》. The research results were published in《Nano Energy》 in 2022.COA of Formula: C16H34O The article conveys some information:

The utilization of donor materials with complex structures obviously increases the costs of organic photovoltaic (OPV) cells. Therefore, low-cost and high-performance are two issues that must be considered when designing polymer donors for the preparations of large-area OPV cells. Here, a poly(thienylene vinylene) derivative, named PTVT-BT was reported. PTVT-BT has a very simple completely non-fused mol. structure. PTVT-BT shows planar mol. structure and obvious solution aggregation effect. Besides, PTVT-BT demonstrates a high hole mobility up to the magnitude of 10^-2 cm^-2 V^-1 s^-1. The external quantum efficiency of electroluminescence of PTVT-BT is 7 x 10-3. As a result, the OPV cell based on PTVT-BT:eC9 demonstrates a power conversion efficiency (PCE) of 16.31%, which is the highest value among the poly(thienylene vinylene)- and polythiophene-based OPV cells. The tandem OPV cell with PTVT-BT as the donor of the sub-cell yields an outstanding PCE of 18.49%. Besides, the indoor OPV cell based on PTVT-BT:BTA3 exhibits a PCE of 27.30% under a light-emitting diode (LED) illumination of 1000 lx (2700 K). This study indicates that PTV-derivative is a kind of promising material for the future OPV industrialization. The experimental procedure involved many compounds, such as 2-Hexyl-1-decanol (cas: 2425-77-6) .

2-Hexyl-1-decanol(cas: 2425-77-6) is a branched alcohol. It is one of the constituent of the essential oil, extracted from the roots of Adiantum flabellulatum. COA of Formula: C16H34O

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Mirzania, Foroogh;Sarrafi, Yaghoub;Farimani, Mahdi Moridi published 《Comparison of chemical composition, antifungal and antibacterial activities of two populations of Salvia macilenta Boiss. Essential Oil》. The research results were published in《Records of Natural Products》 in 2018.Electric Literature of C10H22O The article conveys some information:

Salvia macilenta Boiss. is a fragrant subshrub which grows wild in some regions of Iran. In this work, we contrasted essential oil contents and components of two wild populations under two different ecol. situations (Kerman and Baluchistan Provinces, Center and South East of Iran, resp.). For the first time the antibacterial and the antimycotic properties of these essential oils were also evaluated against seven bacterial and fungal strains. The essential oils were isolated by hydrodistillation method and the chem. compositions of the samples were examined by GC and GC-MS. Kerman (K) specimen was found to be rich in α-pinene (29.0%), p-cymene (10.7%), veridiflorol (9.1%), α-eudesmol (8.7%), bornyl acetate (7.3%) with lesser concentrations of borneol (4.9%). Principal components were identified as α-eudesmol (35.6%), α-pinene (7.7%), bornyl acetate (7.6%), (E)-nerolidol (6.5%) and veridiflorol (5.9%) from Baluchistan (B) sample. Oxygenated sesquiterpenes were found to be the principal class of components in the oil of Baluchistan sample (53.0%) whereas monoterpene hydrocarbons were the main class in Kerman specimen (46.6%). The results demonstrated that the variety in the volatile compounds could be considered as chemotaxonomic importance and it may be ascribed to their different ecol. and geog. source. And 3,7-Dimethyloctan-3-ol (cas: 78-69-3) was used in the research process.

3,7-Dimethyloctan-3-ol(cas:78-69-3) is a fatty alcohol that is 3-octanol substituted by methyl groups at positions 3 and 7.Electric Literature of C10H22O Metabolite observed in cancer metabolism. It has a role as a human metabolite.

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Kelley, Keven M.;Stenson, Alexandra C.;Dey, Rajarashi;Whelton, Andrew J. published 《Release of drinking water contaminants and odor impacts caused by green building cross-linked polyethylene (PEX) plumbing systems》. The research results were published in《Water Research》 in 2014.COA of Formula: C8H18O2 The article conveys some information:

Green buildings are increasingly being plumbed with crosslinked polyethylene (PEX) potable water pipe. Tap water quality was investigated at a six month old plumbing system and chem. and odor quality impacts of six PEX pipe brands were examined Eleven PEX related contaminants were found in the plumbing system; one regulated (toluene) and several unregulated: Antioxidant degradation products, resin solvents, initiator degradation products, or manufacturing aides. Water chem. and odor quality was monitored for new PEX-a, -b and -c pipes with (2 mg/L free chlorine) and without disinfectant over 30 days. Odor and total organic carbon (TOC) levels decreased for all pipes, but odor remained greater than the USA’s Environmental Protection Agency’s (USEPA) secondary maximum contaminant level. Odors were not attributed to known odorants ethyl-tert-Bu ether (ETBE) or methyl-tert-Bu ether (MTBE). Free chlorine caused odor levels for PEX-a1 pipe to increase from 26 to 75 threshold odor number (TON) on day 3 and affected the rate at which TOC changed for each brand over 30 days. As TOC decreased, the UV absorbance at 254 nm increased. Pipes consumed as much as 0.5 mg/L as Cl₂ during each 3 day stagnation period. Sixteen organic chems. were identified, including toluene, pyridine, methylene trichloroacetate and 2,4-di-tert-butylphenol. Some were also detected during the plumbing system field investigation. Six brands of PEX pipes sold in the USA and a PEX-a green building plumbing system impacted chem. and drinking water odor quality. To complete the study, the researchers used 2,5-Dimethyl-2,5-hexanediol (cas: 110-03-2) .

2,5-Dimethyl-2,5-hexanediol(cas:110-03-2) on heteropoly acid catalyzed dehydration yields cyclic ethers via stereospecific intramolecular SN2 mechanism. It reacts with nitriles in concentrated sulfuric acid to yield Δ1-pyrrolines.COA of Formula: C8H18O2

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SDS of cas: 140-66-9《Effects of four drying methods on Ganoderma lucidum volatile organic compounds analyzed via headspace solid-phase microextraction and comprehensive two-dimensional chromatography-time-of-flight mass spectrometry》 was published in 2021. The authors were Liu, Yi-jun;Qian, Yang-yang;Bing, Shu;Liu, Yang-yang;Tu, Xing-hao;Ouyang, Hong-jun;Li, Yahui;Ge, Tan;Yu, Zi-wei;Fei, Chen;Lin, Li-jing, and the article was included in《Microchemical Journal》. The author mentioned the following in the article:

The effect of four drying methods (namely, sun drying, vacuum freeze drying, vacuum drying, and hot air drying) on the fresh Ganoderma lucidum volatile organic compounds (VOCs) was studied by their separation via headspace solid-phase microextraction and identification via comprehensive two-dimensional chromatog.-time-of-flight mass spectrometry. In total, 247 kinds of VOCs, mainly composed of alcs., aldehydes, esters, ketones, and olefins, were identified. Orthogonal partial least squares discriminant anal. and displacement test combined with the variable important in the projection method revealed that VOCs’ types and contents in Ganoderma lucidum were influenced by the particular drying method, which could be identified using specific organic compounds The heating process increased the content of aldehydes, esters, and olefins and reduced alc. and ketones’ content. Since 3-propoxy-1-Propene, 2-pentyl-Furan, Acetic acid, 2-Butanone, 1-Pantano, and other VOCs did not disappear during the drying process, they can be used for the classification and identification of Ganoderma lucidum species and other edible fungi. To complete the study, the researchers used 4-tert-Octylphenol (cas: 140-66-9) .

4-tert-Octylphenol(cas: 140-66-9) has been used as a reference standard for the determination of the analyte in water samples using ultra-high-performance liquid chromatography/tandem mass spectrometry (UHPLC/MS/MS).SDS of cas: 140-66-9

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Chacon, Manuel;Vazquez, Natalia;Persinal-Medina, Mairobi;Alonso-Alonso, Sergio;Alcalde, Ignacio;Merayo-Lloves, Jesus;Meana, Alvaro published 《In-house performance assessment of 3D QobuR-Reconstructed Human Cornea-Like Epithelium (RhCE) for the evaluation of eye hazard》 in 2022. The article was appeared in 《Toxicology In Vitro》. They have made some progress in their research.Application of 110-03-2 The article mentions the following:

To replace the Draize eye irritation test (OECD Test Guideline 404), several test methods based on reconstructed cornea-like epithelium (RhCE) have been developed and adopted in the OECD TG 492. The objective of this study was to establish the exptl. procedures and evaluate the performance assessment of QobuR-RhCE, an inhouse RhCE model to be used for the evaluation of eye hazard. We define the essential structural, functional and procedural elements of the test method components to help assuring that the proposed test method is based on the same concepts as the validated reference methods. Performance assessment was evaluated in accordance with the revised performance standards for the assessment of proposed similar or modified in vitro reconstructed human cornea-like epithelium and the min. list of reference chems. was evaluated. As result, the proposed method scored 93.3% sensibility, 60% specificity, 76.7% accuracy and 96.7% within-laboratory reproducibility (WLR), providing a similar performance in comparison to the validated reference methods. Addnl., we describe a secondary endpoint based on Transepithelial Elec. Resistance (TEER) that could be of use to better discriminate between irritants and non-irritants. Taken together the results indicate that the QobuR-RhCE test method is an accurate screening tool that can be used as a standalone alternative to evaluate ocular irritation. To complete the study, the researchers used 2,5-Dimethyl-2,5-hexanediol (cas: 110-03-2) .

2,5-Dimethyl-2,5-hexanediol(cas:110-03-2) was used in the synthesis of six- and seven-membered heterocyclic boron compounds containing intramolecular N-B bond.Application of 110-03-2

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