Tag: 100-200

On September 9, 2020, Elimelech, Orian; Aviv, Omer; Oded, Meirav; Banin, Uri published an article.Category: alcohols-buliding-blocks The title of the article was A Tale of Tails: Thermodynamics of CdSe Nanocrystal Surface Ligand Exchange. And the article contained the following:

The surface ligands of semiconductor nanocrystals (NCs) are central for determining their properties and for their flexible implementation in diverse applications. Thus far, the thermodn. characteristics of ligand exchange reactions were attained by indirect methods. Isothermal titration calorimetry is utilized to directly and independently measure both the equilibrium constant and the reaction enthalpy of a model ligand exchange reaction from oleate-capped CdSe NCs to a series of alkylthiols. Increased reaction exothermicity for longer chains, accompanied by a decrease in reaction entropy with an overall enthalpy-entropy compensation behavior is observed, explained by the length-dependent interchain interactions and the organization of the bound ligands on the NCs’ surface. An increase in the spontaneity of the reaction with decreasing NC size is also revealed, due to their enhanced surface reactivity. This work provides a fundamental understanding of the physicochem. properties of the NC surface with implications for NC surface ligand design. The experimental process involved the reaction of 1-Decanethiol(cas: 143-10-2).Category: alcohols-buliding-blocks

The Article related to cadmium selenide nanocrystal ligand exchange thiol, cdse nanocrystals, enthalpy−entropy compensation, isothermal titration calorimetry, ligand exchange, nanocrystal surface analysis and other aspects.Category: alcohols-buliding-blocks

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

On September 1, 2016, Acharya, Pratap Chandra; Vasi, Ruqaiya; Suares, Divya published an article.Recommanded Product: 78-26-2 The title of the article was FTIR assay method for UV inactive drug carisoprodol and identification of degradants by RP-HPLC and ESI-MS. And the article contained the following:

A new method of anal. has been developed for UV inactive drug carisoprodol using FTIR spectroscopy. These methods were validated for various parameters according to ICH guidelines. The proposed method has also been successfully applied for the determination of the drug concentration in a tablet formulation. The method proved to be accurate (mean percentage recovery between 95 and 105%), precise and reproducible (relative standard deviation < 2%), while being simple, economical and less time consuming than other methods and can be used for routine estimation of carisoprodol in the pharmaceutical industry. The developed method also implicates its utility for other UV inactive substances. The stability of the drug under various stress conditions was studied and the drug was found to be particularly susceptible to alk. hydrolysis. Degradation products of the alk. hydrolysis were detected by RP-HPLC and tentatively identified by ESI-MS. The experimental process involved the reaction of 2-Methyl-2-propylpropane-1,3-diol(cas: 78-26-2).Recommanded Product: 78-26-2

The Article related to carisoprodol degradant ftir reversed phase hplc esi ms, carisoprodol quantitative estimation, degradant identification, ftir method development, forced degradation, uv inactive drug and other aspects.Recommanded Product: 78-26-2

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

On January 31, 2022, Corazza, Monica; Schenetti, Cecilia; Schettini, Natale; Zedde, Pierantonia; Borghi, Alessandro published an article.Quality Control of Pentane-1,5-diol The title of the article was Pentylene glycol: An emerging cosmetic allergen?. And the article contained the following:

A review. In this report patch tests with pentylene glycol (PTG) and propylene glycol (PG) at the same concentrations were performed in 15 healthy subjects with no reactions. Pentylene glycol is a preservative, solvent, and humectant that might be used increasingly in cosmetic products. It is considered to be both a weak irritant and a weak allergen. In our patient no cross reactions were observed, confirming what has been observed in the literature. Further studies are strongly needed define the real allergenic potential of this mol., which is used frequently in cosmetics that are formulated for sensitive and atopic skin. Finally, the occurrence of cross reactivity between different glycols should be deeply investigated, perhaps using higher patch-test concentrations and later readings. The experimental process involved the reaction of Pentane-1,5-diol(cas: 111-29-5).Quality Control of Pentane-1,5-diol

The Article related to review pentylene glycol cosmetic allergen irritant patch test, 1,5-pentanediol, cas no 5343-92-0, allergic contact dermatitis, case report, cosmetic cream, glycols, pentylene glycol and other aspects.Quality Control of Pentane-1,5-diol

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

On January 31, 2020, Francisco, Carla S.; Javarini, Clara L.; Barcelos, Iatahanderson de S.; Morais, Pedro A. B.; de Paula, Heberth; Borges, Warley de S.; Cunha Neto, Alvaro; Lacerda, Valdemar published an article.SDS of cas: 621-37-4 The title of the article was Synthesis of Coumarin Derivatives as Versatile Scaffolds for GSK-3β Enzyme Inhibition. And the article contained the following:

Glycogen synthase kinase-3 (GSK-3) is involved in the phosphorylation and inactivation of glycogen synthase. GSK-3 inhibitors have been associated with a variety of diseases, including Alzheimer’s disease (AD), diabetes type II, neurol. disorders, and cancer. The inhibition of GSK-3β isoforms is likely to represent an effective strategy against AD. The present work aimed to design and synthesize coumarin derivatives to explore their potential as GSK-3β kinase inhibitors. The through different synthetic methods were used to prepare coumarin derivatives The GSK-3β activity was measured through the ADP-GloTM Kinase Assay, which quantifies the kinasedependent enzymic production of ADP from ATP, using a coupled-luminescence-based reaction. A docking study was performed by using the crystallog. structure of the staurosporine/GSK-3β complex [Protein Data Bank (PDB) code: 1Q3D]. The eleven coumarin derivatives were obtained and evaluated as potential GSK-3β inhibitors. Addnl., in silico studies were performed. The results revealed that the compounds 5c, 5d, and 6b inhibited GSK-3β enzymic activity by 38.97-49.62% at 1 mM. The other coumarin derivatives were tested at 1 mM, 1μM, and 1 nM concentrations and were shown to be inhibitor candidates, with significant IC50 (1.224-6.875μM) values, except for compound 7c (IC50 = 10.809μM). Docking simulations showed polar interactions between compound 5b and Lys85 and Ser203, clarifying the mechanism of the most potent activity. The coumarin derivatives 3a and 5b, developed in this study, showed remarkable activity as GSK-3β inhibitors. The experimental process involved the reaction of 3-Hydroxyphenylacetic acid(cas: 621-37-4).SDS of cas: 621-37-4

The Article related to methoxyphenylcoumarin gsk3beta inhibitor alzheimer disease antialzheimer agent, biological activity, coumarin, coumarin derivatives, enzymatic inhibition, gsk-3β, molecular docking. and other aspects.SDS of cas: 621-37-4

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

On October 1, 2022, Qie, Mengjie; Li, Tiwen; Liu, Charles C.; Zhao, Yan published an article.Electric Literature of 473-81-4 The title of the article was Direct analysis in real time high-resolution mass spectrometry for authenticity assessment of lamb. And the article contained the following:

In comparison to more traditional methods of determining food authenticity, such as gas chromatog. anal., the primary advantages of DART-HRMS include its high speed and throughput of anal. This study used a non-targeted metabolomics method based on real-time high-resolution mass spectrometry combined with chemometric anal. to distinguish lamb samples from four regions. Orthogonal least squares-discriminant anal. revealed a distinct difference between these four lamb regions. The potential markers were chosen based on the variables importance in projection values, variance, and fold change. A total of 79 markers were identified using the matching chem. database. These markers differed significantly between lambs in four regions according to heatmap anal. The linear discriminatory anal. model had an initial classification rate of 100.0% and a cross-validation accuracy of 82.50% on the identified markers. The research demonstrates that DART-HRMS can perform a rapid authentication evaluation of lamb samples. The experimental process involved the reaction of 2,3-Dihydroxypropanoic acid(cas: 473-81-4).Electric Literature of 473-81-4

The Article related to real time high resolution mass spectrometry lamb authenticity assessment, dart–tofms, food authentication, lamb, metabolomic fingerprinting, multivariate analysis, untargeted method and other aspects.Electric Literature of 473-81-4

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

On January 15, 2021, Cen, Xuecong; Liu, Yu; Chen, Bo; Liu, Dehua; Chen, Zhen published an article.Category: alcohols-buliding-blocks The title of the article was Metabolic engineering of Escherichia coli for de novo production of 1,5-pentanediol from glucose. And the article contained the following:

1,5-Pentanediol (1,5-PDO) is an important C5 building block for the synthesis of different value-added polyurethanes and polyesters. However, no natural metabolic pathway exists for the biosynthesis of 1,5-PDO. Herein we designed and constructed a promising nonnatural pathway for de novo production of 1,5-PDO from cheap carbohydrates. This biosynthesis route expands natural lysine pathways and employs two artificial metabolic modules to sequentially convert lysine into 5-hydroxyvalerate (5-HV) and 1,5-PDO via 5-hydroxyvaleryl-CoA. Theor., the 5-hydroxyvaleryl-CoA-based pathway is more energy-efficient than a recently published carboxylic acid reductase-based pathway for 1,5-PDO production By combining strategies of systematic enzyme screening, pathway balancing, and transporter engineering, we successfully constructed a minimally engineered Escherichia coli strain capable of producing 3.19 g/L of 5-HV and 0.35 g/L of 1,5-PDO in a medium containing 20 g/L of glucose and 5 g/L lysine. Introducing the synthetic modules into a lysine producer and enhancing NADPH supply enabled the strain to accumulate 1.04 g/L of 5-HV and 0.12 g/L of 1,5-PDO using glucose as the main carbon source. This work lays the basis for the development of a biol. route for 1,5-PDO production from renewable bioresources. The experimental process involved the reaction of Pentane-1,5-diol(cas: 111-29-5).Category: alcohols-buliding-blocks

The Article related to metabolic engineering escherichia pentanediol glucose anaerobic fermentation, 1,5-pentanediol, escherichia coli, enzyme screening, lysine, metabolic engineering, nonnatural pathway and other aspects.Category: alcohols-buliding-blocks

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Vieira, Vanessa; Calhelha, Ricardo C.; Barros, Lillian; Coutinho, Joao A. P.; Ferreira, Isabel C. F. R.; Ferreira, Olga published an article in 2020, the title of the article was Insights on the extraction performance of alkanediols and glycerol: using Juglans regia L. leaves as a source of bioactive compounds.Recommanded Product: 111-29-5 And the article contains the following content:

Glycerol and alkanediols are being studied as alternative solvents to extract phytochems. from plant material, often as hydrogen bond donors in deep eutectic solvents (DESs). Many of those alcs. are liquid at room temperature, yet studies of their use as extraction solvents are scarce. In this work, glycerol and a series of alkanediols (1,2-ethanediol, 1,2-propanediol, 1,3-propanediol, 1,3-butanediol, 1,2-pentanediol, 1,5-pentanediol, and 1,2-hexanediol) were studied for the extraction of phenolic compounds from Juglans regia L. leaves, a rich source of this class of bioactive compounds The extraction yield was quantified, and the bioactivity of both extracts and pure solvents was evaluated by measuring the anti-inflammatory and cytotoxic activities. The solvents showing the best combined results were 1,2 and 1,3-propanediol, as their extracts presented a high amount of phenolic compounds, close to the results of ethanol, and similar cytotoxicity against cervical carcinoma cells, with no impact on non-tumor porcine liver cells in the studied concentration range. On the other hand, none of the extracts (and solvents) presented anti-inflammatory activity. Overall, the results obtained in this work contribute to the study of alternative solvents that could potentially be used also as formulation media, highlighting the importance of walnut leaves as a source of bioactive compounds The experimental process involved the reaction of Pentane-1,5-diol(cas: 111-29-5).Recommanded Product: 111-29-5

The Article related to juglans leaf phenolic compound extraction alkanediols glycerol hplc, juglans regia l., alkanediols, anti-inflammatory activity, cytotoxicity, glycerol, phenolic compounds, solvents and other aspects.Recommanded Product: 111-29-5

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Beale, David J.; Nguyen, Thao V.; Shah, Rohan M.; Bissett, Andrew; Nahar, Akhikun; Smith, Matthew; Gonzalez-Astudillo, Viviana; Braun, Christoph; Baddiley, Brenda; Vardy, Suzanne published an article in 2022, the title of the article was Host-Gut Microbiome Metabolic Interactions in PFAS-Impacted Freshwater Turtles (Emydura macquarii macquarii).Safety of 3-Hydroxyphenylacetic acid And the article contains the following content:

Per-and polyfluoroalkyl substances (PFAS) are a growing concern for humans, wildlife, and more broadly, ecosystem health. Previously, we characterised the microbial and biochem. impact of elevated PFAS on the gut microbiome of freshwater turtles (Emydura macquarii macquarii) within a contaminated catchment in Queensland, Australia. However, the understanding of PFAS impacts on this species and other aquatic organisms is still very limited, especially at the host-gut microbiome mol. interaction level. To this end, the present study aimed to apply these leading-edge omics technologies within an integrated framework that provides biol. insight into the host turtle-turtle gut microbiome interactions of PFAS-impacted wild-caught freshwater turtles. For this purpose, faecal samples from PFAS-impacted turtles (n = 5) and suitable PFAS-free reference turtles (n = 5) were collected and analyzed. Data from 16S rRNA gene amplicon sequencing and metabolomic profiling of the turtle faeces were integrated using MetOrigin to assign host, microbiome, and co-metabolism activities. Significant variation in microbial composition was observed between the two turtle groups. The PFAS-impacted turtles showed a higher relative abundance of Firmicutes and a lower relative abundance of Bacteroidota than the reference turtles. The faecal metabolome showed several metabolites and pathways significantly affected by PFAS exposure. Turtles exposed to PFAS displayed altered amino acid and butanoate metabolisms, as well as altered purine and pyrimidine metabolism It is predicted from this study that PFAS-impacted both the metabolism of the host turtle and its gut microbiota which in turn has the potential to influence the host′s physiol. and health. The experimental process involved the reaction of 3-Hydroxyphenylacetic acid(cas: 621-37-4).Safety of 3-Hydroxyphenylacetic acid

The Article related to emydura macquarii perpolyfluoroalkyl substance gut microbiome metabolic interaction, emydura macquarii, pfas, freshwater turtles, metabolomics, microbiome, omics, water pollutants and other aspects.Safety of 3-Hydroxyphenylacetic acid

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Schjoedt, Mette S.; Gurdeniz, Gozde; Chawes, Bo published an article in 2020, the title of the article was The metabolomics of childhood atopic diseases: a comprehensive pathway-specific review.Synthetic Route of 621-37-4 And the article contains the following content:

A review. Asthma, allergic rhinitis, food allergy, and atopic dermatitis are common childhood diseases with several different underlying mechanisms, i.e., endotypes of disease. Metabolomics has the potential to identify disease endotypes, which could beneficially promote personalized prevention and treatment. Here, we summarize the findings from metabolomics studies of children with atopic diseases focusing on tyrosine and tryptophan metabolism, lipids (particularly, sphingolipids), polyunsaturated fatty acids, microbially derived metabolites (particularly, short-chain fatty acids), and bile acids. We included 25 studies: 23 examined asthma or wheezing, five examined allergy endpoints, and two focused on atopic dermatitis. Of the 25 studies, 20 reported findings in the pathways of interest with findings for asthma in all pathways and for allergy and atopic dermatitis in most pathways except tyrosine metabolism and short-chain fatty acids, resp. Particularly, tyrosine, 3-hydroxyphenylacetic acid, N-acetyltyrosine, tryptophan, indolelactic acid, 5-hydroxyindoleacetic acid, p-Cresol sulfate, taurocholic acid, taurochenodeoxycholic acid, glycohyocholic acid, glycocholic acid, and docosapentaenoate n-6 were identified in at least two studies. This pathway-specific review provides a comprehensive overview of the existing evidence from metabolomics studies of childhood atopic diseases. The altered metabolic pathways uncover some of the underlying biochem. mechanisms leading to these common childhood disorders, which may become of potential value in clin. practice. The experimental process involved the reaction of 3-Hydroxyphenylacetic acid(cas: 621-37-4).Synthetic Route of 621-37-4

The Article related to review childhood atopic disease metabolomics, asthma, atopy, bile acids, children, lipids, metabolomics, polyunsaturated fatty acids, short-chain fatty acids, tryptophan, tyrosine and other aspects.Synthetic Route of 621-37-4

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

On January 15, 2009, Dalence, Maria; Johansson, Martin; Thornqvist Oltner, Viveca; Toftered, Joergen; Wensbo, David published a patent.Recommanded Product: (6-(Trifluoromethyl)pyridin-3-yl)methanol The title of the patent was Preparation of novel bronchodilating isoquinoline carbamates. And the patent contained the following:

The title compounds I [R1, R2 = H or Me; R3, R4 = H, F, Cl, Br, alkyl, benzyl; G = (un)substituted alkylene(hetero)aryl; with the proviso that not both of R1 and R2 is Me; and the exclusion of 3 compounds], useful to manufacture a medicament to treat a disorder or disease characterized by bronchoconstriction, e.g. COPD and asthma, and by vasoconstriction, e.g. hypertension, were prepared E.g., a 3-step synthesis of I [R1, R2 = H; R3, R4 = Cl; G = CH2Ph], starting from 6,7-dimethoxy-1,2,3,4-tetrahydroisoquinoline hydrochloride, was given. Exemplified compounds I were tested for their biol. activity. For example, pre-treatment with I [R1, R2 = H; R3, R4 = Cl; G = CH2Ph] resulted in 38% remaining contraction of human bronchiols after leukotriene D4 (10 nM) induced contraction. Pharmaceutical composition comprising the compound I is disclosed. The experimental process involved the reaction of (6-(Trifluoromethyl)pyridin-3-yl)methanol(cas: 386704-04-7).Recommanded Product: (6-(Trifluoromethyl)pyridin-3-yl)methanol

The Article related to isoquinoline carbamate preparation bronchodilator bronchoconstriction vasoconstriction copd asthma hypertension, antiasthmatic antihypertensive isoquinoline carbamate preparation and other aspects.Recommanded Product: (6-(Trifluoromethyl)pyridin-3-yl)methanol

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts