Month: September 2022

Kim, Youngnam;Hong, Seongjin;Lee, Junghyun;Yoon, Seo Joon;An, Yoonyoung;Kim, Min-Seob;Jeong, Hee-Dong;Khim, Jong Seong published 《Spatial distribution and source identification of traditional and emerging persistent toxic substances in the offshore sediment of South Korea》 in 2021. The article was appeared in 《Science of the Total Environment》. They have made some progress in their research.Quality Control of 4-tert-Octylphenol The article mentions the following:

While the coastal pollution of persistent toxic substances has been widely documented, information on offshore environments remains limited. Here, we investigated the spatial distribution and sources of PTSs in the offshore sediments (n = 34) of South Korea. Sediment samples collected from the Yellow Sea (n = 18), the South Sea (n = 10), and the East Sea (n = 6), in 2017-18 were analyzed for a total of 71 PTSs. Low-chlorinated PCBs (tri- and tetra Cl-CBs) were predominant (mean: 77%), primarily indicating atm. inputs. PAHs widely accumulated in the three seas with low to moderate level (22-250 ng g-1 OC), and dominated by high mol. weight PAHs (4-6 rings). PMF anal. revealed coast-specific PAHs sources; i.e., originated from mainly coke production (77%) in the Yellow Sea, vehicle emissions (68%) in the South Sea, and fossil fuel combustion (49%) in the East Sea. SOs showed significant contamination than other PTSs, with elevated concentrations in the Yellow Sea (mean: 350 ng g^-1 OC). APs showed a similar regional distribution to SOs, but concentrations were much lower (mean: 17 ng g^-1 OC). SOs and APs seemed to be introduced from rivers and estuaries on the west coast of Korea, where industrial and municipal activities are concentrated, then might be transported to offshore through tide or currents. Overall, the novel data presented for various PTSs in offshore Korean sediments warrant the necessity of a long-term monitoring effort and urgent management practice to protect marine ecosystem.4-tert-Octylphenol (cas: 140-66-9) were involved in the experimental procedure.

4-tert-Octylphenol(cas: 140-66-9) is a common environmental pollutant showing weak estrogenic effects.Quality Control of 4-tert-Octylphenol It has been shown to cause harm to vertebrate male reproductive systems.

Reference:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Today I want to share an article with you. The article is 《Evaluation of protein degradation and flavor compounds during the processing of Xuan′en ham》,you can find this article in 《Journal of Food Science》. The following contents are mentioned:

Protein degradation occurs during the processing of dry-cured ham, which has important influences on the flavor and quality of products. The aim of this work was to study the degradation kinetics of myofibrillar proteins (MPs) and sarcoplasmic proteins (SPs) extracted from the biceps femoris muscle during the processing of Xuan′en ham. A relationship between protein degradation and the flavor formation was found. During the processing of Xuan ′en ham, MPs and SPs were mainly degraded in the salting stage and incipient fermentation Accompanied by protein degradation, the content of carbonyl group in SPs increased gradually, but in MPs, it first increased and then decreased. Interconversion between sulfhydryl and disulfide bonds was investigated during this processing. Oxidation, degradation, and thermal effects significantly affected the surface hydrophobicity of proteins. More than one hundred volatile compounds have been identified at each stage of ham preparation Among them, organic acids were the predominant group, followed by hydrocarbons, aldehydes, alcs., ketones, and esters. To complete the study, the researchers used 2-Hexyl-1-decanol (cas: 2425-77-6) .

2-Hexyl-1-decanol(cas: 2425-77-6) has been shown to inhibit the growth of b16 mouse melanoma cells, suggesting it may be useful for treating skin cancer.Electric Literature of C16H34O This fatty acid also has transport properties and can form hydrogen bonds with other molecules.

Reference:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Sun, Jing;Huang, Qinyi;Li, Fang;Liu, Lingtao;Han, Fang;Su, Xiurong published 《Application of electronic nose and GC-MS to differentiate volatiles of soybean oils prepared with different temperature conditions》 in 2013. The article was appeared in 《Zhongguo Liangyou Xuebao》. They have made some progress in their research.Safety of 2,5-Dimethyl-2,5-hexanediol The article mentions the following:

In order to establish rapid detection technol. and ensure the safety of edible oil, investigations were carried out to explore the relationship between soybean oil volatiles and temperature conditions. Chem. sensor technol. and headspace-solid phase micro-extraction (HS-SPME) coupled with gas chromatog.-mass spectrometry (GC-MS) were used to analyze the volatiles of soybean oil with different temperature conditions. The results showed that chem. sensor can be sensitive to detect the odor changes of soybean oil in the heating process. Fresh, 150°C, 180°C and 220°C soybean oil volatiles were significantly different by PCA and I. DA methods. There were 27, 60, 100 and 115 kinds of volatile compounds detected from fresh, 150°C, 180°C and 220°C soybean oil, resp. Among these compounds, most of them were hydrocarbons, aldehydes, ketones, ethers, esters, acids, heterocyclic compounds, and hydro-peroxides. The content of hydroperoxides in fresh soybean oil was higher than other samples. Ketones and alcs. with oil incense were the main volatiles of soybean oil at 150°C. Aldehydes and heterocyclic compounds were the main volatiles of 180°C and 220°C soybean oil, and they produce coke flavor, roasted flavor also endanger human health. And 2,5-Dimethyl-2,5-hexanediol (cas: 110-03-2) was used in the research process.

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.Safety of 2,5-Dimethyl-2,5-hexanediol

Reference:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Kamei, Yuji;Seino, Yusuke;Yamaguchi, Yuto;Yoshino, Tatsuhiko;Maeda, Satoshi;Kojima, Masahiro;Matsunaga, Shigeki published 《Silane- and peroxide-free hydrogen atom transfer hydrogenation using ascorbic acid and cobalt-photoredox dual catalysis》. The research results were published in《Nature Communications》 in 2021.Computed Properties of C10H22O The article conveys some information:

A silane- and peroxide-free HAT hydrogenation using a combined cobalt/photoredox catalysis and ascorbic acid (vitamin C) as a sole stoichiometric reactant was reported. A cobalt salophen complex is identified as the optimal cocatalyst for this environmentally benign HAT hydrogenation in aqueous media, which exhibits high functional-group tolerance. In addition to its applicability in the late-stage hydrogenation of amino-acid derivatives e.g., serine and drug mols., this method offers unique advantage in direct transformation of unprotected sugar derivatives e.g., (2R,3R,4R,5R,6S)-2-(hydroxymethyl)-6-(2-methylallyl)tetrahydro-2H-pyran-3,4,5-triol and allows the HAT hydrogenation of unprotected C-glycoside e.g., ((2R,3S,4R,5S)-3,4-dihydroxy-5-(2-methylallyl)tetrahydrofuran-2-yl)methyl acetate in higher yield compared to previously reported HAT hydrogenation protocols. The proposed mechanism is supported by exptl. and theor. studies. To complete the study, the researchers used 3,7-Dimethyloctan-3-ol (cas: 78-69-3) .

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.Computed Properties of C10H22O Metabolite observed in cancer metabolism. It has a role as a human metabolite.

Reference:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Name: 2-Hexyl-1-decanol《Preparation of a Coal-Based MoS₂/SiO₂/GO Composite Catalyst and Its Performance in the Photocatalytic Degradation of Wastewater and Hydrogen Production》 was published in 2022. The authors were Sun, Jinyan;Maimaiti, Halidan;Zhai, Peishuai;Zhang, Haizheng;Feng, Lirong;Bao, Jianzhao;Zhao, Xuwei, and the article was included in《Langmuir》. The author mentioned the following in the article:

Photocatalytic degradation of wastewater and the simultaneous production of hydrogen (H₂) is a green and efficient method to solve energy and environmental problems. In this paper, coal-based SiO₂/GO with a stable structure was prepared by a modified Hummers oxidation method, and then, a lotus-shaped composite photocatalyst, MoS₂/SiO₂/GO, was prepared by in situ loading of flower cluster MoS₂ from sodium molybdate reduction onto SiO₂/GO. Its photocatalytic degradation of wastewater and H₂ production properties were investigated while characterizing the material structure. The results show that SiO₂/GO as a carrier not only ensures adequate dispersion of MoS₂ but also enhances the visible-light response of the composite catalyst. In addition, it can also hinder the recombination of photogenerated electrons and holes in MoS₂ and act as an electron transport channel in composite catalysts. MoS₂/SiO₂/GO exhibits much higher photocatalytic degradation of wastewater and H₂ production capacity than MoS₂: after 180 min of reaction, the CODcr removal of wastewater increased from 45.6% for MoS₂ to 84.2% for MoS₂/SiO₂/GO and the H₂ yield reached 233.4μmol. The goal of degrading wastewater while producing H₂ more economically has been tentatively achieved, although not to the extent required for 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) has been shown to inhibit the growth of b16 mouse melanoma cells, suggesting it may be useful for treating skin cancer.Name: 2-Hexyl-1-decanol This fatty acid also has transport properties and can form hydrogen bonds with other molecules.

Reference:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Taritla, Sidhartha;Kumari, Madhuree;Kamat, Siya;Bhat, Sarita G.;Jayabaskaran, C. published 《Optimization of physicochemical parameters for production of cytotoxic secondary metabolites and apoptosis induction activities in the culture extract of a marine algal-derived endophytic fungus Aspergillus sp.》. The research results were published in《Frontiers in Pharmacology》 in 2021.Recommanded Product: 2-Hexyl-1-decanol The article conveys some information:

The endophytic fungal community in the marine ecosystem has been demonstrated to be relevant source of novel and pharmacol. active secondary metabolites. The current study focused on the evaluation of cytotoxic and apoptosis induction potential in the culture extracts of endophytic fungi associated with Sargassum muticum, a marine brown alga. The cytotoxicity of the four marine endophytes, Aspergillus sp., Nigrospora sphaerica, Talaromyces purpureogenus, and Talaromyces stipitatus, was evaluated by the MTT assay on HeLa cells. Further, several physicochem. parameters, including growth curve, culture media, and organic solvents, were optimized for enhanced cytotoxic activity of the selected extract The Aspergillus sp. Et acetate extract (ASE) showed maximum cytotoxicity on multiple cancer cell lines. Chem. investigation of the metabolites by gas chromatog.-mass spectroscopy (GC-MS) showed the presence of several compounds, including quinoline, indole, 2,4-bis(1,1-dimethylethyl) phenol, and hexadecenoic acid, known to be cytotoxic in ASE. The ASE was then tested for cytotoxicity in vitro on a panel of six human cancer cell lines, namely, HeLa (cervical adenocarcinoma), MCF-7 (breast adenocarcinoma), Hep G2 (hepatocellular carcinoma), A-549 (lung carcinoma), A-431 (skin/epidermis carcinoma), and LN-229 (glioblastoma). HeLa cells were most vulnerable to ASE treatment with an IC₅₀ value of 24 ± 2 μg/mL. The mechanism of cytotoxicity exhibited by the ASE was further investigated on Hela cells. The results showed that the ASE was capable of inducing apoptosis in HeLa cells through production of reactive oxygen species, depolarization of mitochondrial membrane, and activation of the caspase-3 pathway, which shows a possible activation of the intrinsic apoptosis pathway. It also arrested the HeLa cells at the G2/M phase of the cell cycle, eventually leading to apoptosis. Through this study, we add to the knowledge about the marine algae associated with fungal endophytes and report its potential for purifying specific compounds responsible for cytotoxicity.2-Hexyl-1-decanol (cas: 2425-77-6) were involved in the experimental procedure.

2-Hexyl-1-decanol(cas: 2425-77-6) is a fatty acid that is found in the essential oils of plants and has been shown to have fungicidal properties.Recommanded Product: 2-Hexyl-1-decanol It has also been shown to inhibit the growth of Candida glabrata when used as a cationic surfactant.

Reference:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Rose, Levi D.;Akob, Denise M.;Tuberty, Shea R.;Corsi, Steven R.;DeCicco, Laura A.;Colby, Jeffrey D.;Martin, Derek J. published 《Use of high-throughput screening results to prioritize chemicals for potential adverse biological effects within a West Virginia watershed》 in 2019. The article was appeared in 《Science of the Total Environment》. They have made some progress in their research.Formula: C15H16O The article mentions the following:

Organic chems. from industrial, agricultural, and residential activities can enter surface waters through regulated and unregulated discharges, combined sewer overflows, stormwater runoff, accidental spills, and leaking septic-conveyance systems on a daily basis. The impact of point and nonpoint contaminant sources can result in adverse biol. effects for organisms living in or near surface waters. Assessing the adverse or toxic effects that may result when exposure occurs is complicated by the fact that many commonly used chems. lack toxicity information or water quality standards To address these challenges, an exposure-activity ratio (EAR) screening approach was used to prioritize environmental chem. data in a West Virginia watershed (Wolf Creek). Wolf Creek is a drinking water source and recreation resource with documented water quality impacts from point and nonpoint sources. The EAR screening approach uses high-throughput screening (HTS) data from ToxCast as a method of integrating environmental chem. occurrence and biol. effects data. Using water quality schedule 4433, which targets 69 organic waste compounds typically found in domestic and industrial wastewater, chems. were screened for potential adverse biol. affects at multiple sites in the Wolf Creek watershed. Cumulative EAR mixture values were greatest at Sites 2 and 3, where bisphenol A (BPA) and pentachlorophenol exhibited maximum EAR values of 0.05 and 0.002, resp. Site 2 is downstream of an unconventional oil and gas (UOG) wastewater disposal facility with documented water quality impacts. Low-level organic contaminants were found at all sample sites in Wolf Creek, except Site 10, where Wolf Creek enters the New River. The application of an EAR screening approach allowed our study to extend beyond traditional environmental monitoring methods to identify multiple sites and chems. that warrant further investigation. The experimental procedure involved many compounds, such as 4-(2-Phenylpropan-2-yl)phenol (cas: 599-64-4) .

4-(2-Phenylpropan-2-yl)phenol(cas:599-64-4) is a natural product found in Panax ginseng.Formula: C15H16O 4-(2-Phenylpropan-2-yl)phenol is a useful reagent for preparing and characterizing aromatic polyphosphonates as high refractive index polymers.

Reference:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

HPLC of Formula: 599-64-4《Palladium-Catalyzed Perfluoroalkylative Carbonylation of Unactivated Alkenes: Access to β-Perfluoroalkyl Esters》 was published in 2021. The authors were Zhang, Youcan;Geng, Hui-Qing;Wu, Xiao-Feng, and the article was included in《Angewandte Chemie, International Edition》. The author mentioned the following in the article:

Transition-metal-catalyzed multi-component carbonylation represents an efficient strategy for the preparation of various functionalized carbonyl-containing compounds Herein, authors report a general palladium-catalyzed perfluoroalkylative carbonylation of unactivated alkenes using inexpensive and readily available carbon monoxide as the C1 source and perfluoroalkyl halides as the coupling partner. A wide range of phenols and alcs. were transformed into the corresponding β-perfluoroalkyl esters in high yields with broad functional group tolerance and good chemoselectivity. Addnl., alkyl halides can be utilized as alkoxy source as well to give the desired esters. Moreover, several pharmaceutical and bio-active mols. were also suitable substrates for this one-pot multi-component carbonylation process to give the targeted products in good yields. The experimental procedure involved many compounds, such as 4-(2-Phenylpropan-2-yl)phenol (cas: 599-64-4) .

4-(2-Phenylpropan-2-yl)phenol(cas:599-64-4) is a natural product found in Panax ginseng.HPLC of Formula: 599-64-4 4-(2-Phenylpropan-2-yl)phenol is a useful reagent for preparing and characterizing aromatic polyphosphonates as high refractive index polymers.

Reference:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Chi, Xuelu;Shao, Yiwei;Pan, Minghui;Yang, Qingyu;Yang, Yan;Zhang, Xiaomei;Ai, Nasi;Sun, Baoguo published 《Distinction of volatile flavor profiles in various skim milk products via HS-SPME-GC-MS and E-nose》 in 2021. The article was appeared in 《European Food Research and Technology》. They have made some progress in their research.Application of 2425-77-6 The article mentions the following:

Volatile flavor profile of skim milk relates to product quality and consumer liking. The volatile compositions of different skim milk products are challenging to discriminate due to subtle constituents and inconspicuous peculiarities. This study develops a correlative anal. protocol for the characterization and differentiation of volatile flavor components in various skim milk products via headspace solid-phase micro-extraction gas chromatog.-mass spectrometry (HS-SPME-GC-MS) and electronic nose (E-nose) with multivariate statistical anal. Sixty-three volatile flavor components were identified in six skim milk products, which were paired into pasteurized skim milk, ultra-high-temperature skim milk, and modified skim milk, resp. Distinguishable variation trends were observed upon the aroma response values of skim milk samples through the solid-state E-nose sensors. The results of principal component anal., cluster heatmap anal. and Venn diagram anal. showed that significant distinctions in varying degrees among the six skim milk products could be presented in both volatile flavor composition and aroma release distribution. The correlative anal. by partial least squares regression indicated an adequate combination of HS-SPME-GC-MS and E-nose for the differentiation and classification of volatile flavor profiles in skim milk products. These findings provide an insightful perspective for the efficient flavor evaluation of fluid skim milk.2-Hexyl-1-decanol (cas: 2425-77-6) were involved in the experimental procedure.

2-Hexyl-1-decanol(cas: 2425-77-6) is a fatty acid that is found in the essential oils of plants and has been shown to have fungicidal properties.Application of 2425-77-6 It has also been shown to inhibit the growth of Candida glabrata when used as a cationic surfactant.

Reference:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Reference of 5-(hydroxymethyl)-2,4-dimethylpyridin-3-ol hydrochlorideIn 1956, Sugiura, Kanematsu published 《Merits of ascites tumors for chemotherapeutic screening. I》. 《Annals of the New York Academy of Sciences》published the findings. The article contains the following contents:

Ehrlich ascites, Krebs 2 ascites carcinomas, and sarcoma 180 ascites tumor were used in the present study. Fresh ascites fluid containing 10⁶ cancer cells were injected into mice and the recipient regularly developed large amounts of milky ascites (5 to 20 cc.) in 1 to 2 wk and died in 1 to 3 wk. The tumors had 100% takes and there were generally no spontaneous regressions. The exudates contained 5 to 10% normal cells. For the chemotherapy test, a donor mouse was selected 1 to 2 wk, after inoculation and 2 to 5 mL. of milky fluid withdrawn, the cells counted in a hemocytometer, and a proper dilution made with 0.9% NaCl solution I.p. injections of 0.1 mL. of fluid containing 10⁶ cells was made. Each group of animals was divided into a control and treatment group. The progress of the tumors was recorded by daily weight measurement and by measuring the amount of ascitic fluid 10 days after the inoculation. The inhibition effect was then estimated from the effects on the ascites and the survival. Chemotherapeutic agents were injected in solvents as necessary; 0.5 cc. CM-cellulose, 0.5 cc. peanut oil, 0.1 cc. sesame oil were used. One hundred compounds were tested on all 3 tumors; these consisted of nitrogen mustards, ethyleneimines, phosphoramides, folic acid analogs and other pteridines, carbamates, purines, pyrimidines, formamides, steroids, hormones, enzymes, antibiotics, antivitamins, inorganic salts, and others. In 64% of the tests the response to agents was identical in all 3 tumors. A similar study was made of 54 agents on the solid and ascites form of the Ehrlich carcinoma and sarcoma 180. The ascites form usually showed the greater sensitivity to the carcinostatic agent. And 5-(hydroxymethyl)-2,4-dimethylpyridin-3-ol hydrochloride (cas: 148-51-6) was used in the research process.

5-(hydroxymethyl)-2,4-dimethylpyridin-3-ol hydrochloride(cas:148-51-6 Reference of 5-(hydroxymethyl)-2,4-dimethylpyridin-3-ol hydrochloride) is a strong antagonist of vitamin B6. Deoxypyridoxine hydrochloride has been used as an analytical reference standard for the quantification of the analyte in food samples using high performance liquid chromatography.

Reference:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts