Author: tianli

Yagishita, Mayuko;Kubo, Takuya;Otsuka, Koji;Nakayama, Shoji F.;Nakajima, Daisuke published 《Development of a database strategy based on liquid chromatography-quadrupole time-of-flight mass spectrometry for the screening of 75 estrogenic chemicals from treated sewage effluent》 in 2021. The article was appeared in 《Separation Science plus》. They have made some progress in their research.Recommanded Product: 4-tert-Octylphenol The article mentions the following:

The detection of endocrine disrupting chems. such as estrogenic compounds in environmental samples is a hot topic of research. In this context, this study describes a new screening method for 75 estrogenic chems. from environmental water samples based on two databases built from the data obtained from liquid chromatog. with quadrupole time-of-flight mass spectrometry. A first database, named ”DATABASE I,” is constructed from the retention time and m/z of mol. weight-related ions with measured accurate mass of the 75 estrogenic chems. A second database, ”DATABASE II,” includes the collision-induced fragmentation spectra with measured accurate mass of the compounds These databases are resp. applied for a rough screening and precise identification of the estrogenic chems. of sewage effluents as follows: Step (1): A treated sewage effluent sample is subjected to anal. using the time-of-flight scan mode, and a rough screening using DATABASE I is performed. Step (2): The obtained candidate estrogenic chems. by step 1 are measured using the targeted tandem mass spectrometry mode in which collision energy dependence fragmentations of them are induced. The resulting fragmentation mass spectra are screened using DATABASE II. The application of these two databases improved the accuracy in the identification of estrogenic chems., reducing the risk of misidentification. The experimental procedure involved many compounds, such as 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).Recommanded Product: 4-tert-Octylphenol

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COA of Formula: C23H32O2In 2021, Pontoni, Ludovico;Roviello, Valentina;Race, Marco;Savignano, Luigi;van Hullebusch, Eric D.;Esposito, Giovanni;Pirozzi, Francesco;Fabbricino, Massimiliano published 《Supramolecular aggregation of colloidal natural organic matter masks priority pollutants released in water from peat soil》. 《Environmental Research》published the findings. The article contains the following contents:

Natural organic matter (NOM) from Sphagnum peat soil is extracted in water and subjected to several investigations to obtain structural and conformational information. Data show that the extracted NOM is self-organized in colloidal aggregates of variable sizes (from nano to micro scales, depending on the solvent composition, i.e., ultrapure water, solutions with denaturing agents, acetone, ethanol). Aggregates are formed by highly heterogeneous classes of organic compounds According to the results of NMR and fluorescence measurements, the three-dimensional structure of aggregates, revealed by scanning electron microscope imaging, is supposed to be stabilized by the exposition of polar functional groups to the solvent, with consequent formation of hydrogen bonds, dipole-interactions and cation bridging. In contrast, the inner part of the aggregates displays hydrophobic features and is hypothesized to be further reinforced by the establishment of π-stacking interactions. The structure is assumed to be a supramol. aggregation of small-medium oligomeric fragments (Max 750 Da) in which priority pollutants are entrapped by dispersive forces. The structures are shown to be nanosized spheroidal particles further aggregated to form higher dimension supra-structures. Carbohydrates play primary role, stabilizing the structure and giving marked hydrophilic properties to the aggregates. And 2,2-Methylenebis(6-tert-butyl-p-cresol) (cas: 119-47-1) was used in the research process.

COA of Formula: 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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Sharma, Pooja;Tripathi, Sonam;Chaturvedi, Preeti;Chaurasia, Deepshi;Chandra, Ram published 《Newly isolated Bacillus sp. PS-6 assisted phytoremediation of heavy metals using Phragmites communis: Potential application in wastewater treatment》 in 2021. The article was appeared in 《Bioresource Technology》. They have made some progress in their research.Electric Literature of C16H34O The article mentions the following:

This work aimed to study Bacillus sp. PS-6 assisted phytoremediation of metals from pulp and paper industry wastewater as a novel green technique for the removal of metals of wastewater. Results revealed that heavy metal (mg L-1) contents in wastewater were reduced after in-situ phytoremediation for Fe, Cu, Zn, Cd, Mn, Ni, Pb, and As. Phragmites communis showed higher potential for the enrichment of Fe, Cu, Zn, Cd, Mn, Ni, Pb, and As in its rhizomes, roots, and shoots compared to leaves. The strain produced indole acetic acid, siderophores, and hydrolytic and ligninolytic enzymes, and resulted in nutrients solubilization. Results offer potential basis for the removal of metals from pulp and paper industry wastewater at large scale and prevention of pollution.2-Hexyl-1-decanol (cas: 2425-77-6) were involved in the experimental procedure.

2-Hexyl-1-decanol(cas: 2425-77-6) may be employed as an organic solvent to study the extraction of non-polar acidic drugs from human plasma by parallel artificial liquid membrane extraction (PALME). Electric Literature of C16H34O

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Quality Control of 2,5-Dimethyl-2,5-hexanediol《New insights into the survival mechanisms of rifampicin-resistant Mycobacterium tuberculosis》 was published in 2016. The authors were Loots, Du Toit, and the article was included in《Journal of Antimicrobial Chemotherapy》. The author mentioned the following in the article:

Rifampicin is considered the most important antibiotic for treating TB, but unfortunately Mycobacterium tuberculosis is rapidly developing resistance to this drug. Despite the fervent research efforts to date, TB is still a major global problem, and hence new approaches are necessary to better characterize this disease, especially the mechanisms relating to drug resistance. Using a two-dimensional GC-coupled time-of-flight MS metabolomics approach, the most important metabolite markers characterizing rifampicin-resistant M. tuberculosis were identified. The metabolite markers identified indicate instability in rifampicin-resistant M. tuberculosis mRNA, induced by the rpoB mutation. This results in a total depletion of aconitic acid, due to a shift in aconitase functionality towards mRNA binding and stability, and away from energy production and growth, and a subsequent increased dependency on alternative energy sources, fatty acids in particular. A number of other metabolic changes were observed, confirming an addnl. survival response for maintaining/remodelling the cell wall. This study shows the value of a metabolomics approach to biol. studies in a quest to better understand disease-causing organisms and their tolerance to existing medications, which would in the future undoubtedly assist in the development of alternative treatment approaches. The experimental procedure involved many compounds, such as 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.Quality Control of 2,5-Dimethyl-2,5-hexanediol

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Quality Control of 2-Hexyl-1-decanolIn 2021, Kumar, M.;Charishma, K.;Sahu, K. P.;Sheoran, N.;Patel, A.;Kundu, A.;Kumar, A. published 《Rice leaf associated Chryseobacterium species: An untapped antagonistic flavobacterium displays volatile mediated suppression of rice blast disease》. 《Biological Control》published the findings. The article contains the following contents:

Rice phyllosphere-associated pigmented bacteria were characterized and identified as Chryseobacterium based on 16S rRNA gene sequencing and phenotypic fingerprinting by Biolog. Mol. phylogenetic anal. by maximum likelihood method clustered the leaf Chryseobacterium with plant or soil-associated Chryseobacterium taklimakanense (OsEp-PSA33); Chryseobacterium camaliae (OsEnb-ALM-D20, OsEnb-ALM-D11); Chryseobacterium culicis (OsEnb-ALM-C23, OsEp-PPA23, OsEp-PPA6, OsEnb-ALM-D3); and Chryseobacterium endophyticum (OsEnb-ALM-A6, OsEnb-ALM-A22). Activity testing of Chryseobacterium isolates showed excellent antifungal activity with over 80.0 mycelial growth inhibition of Magnaporthe oryzae. The Chryseobacterium endophyticum OsEnb-ALM-A6 and OsEnb-ALM-A22 showed over 90 fungal growth inhibition by volatile compounds Chem. anal. of volatiles emitted by Chryseobacterium indicated the abundance of 2-Ethyl-hexanol; 1-Hexadecene; 2-Hexyl-decanol; Heptanal; Furan-diol; and Octanal. Upon seed or seedling bacterization, Chryseobacterium endophyticum not only triggered altered growth pattern of rice but also suppressed blast disease (40.0 reduction over mock). qPCR-based transcriptional anal. showed enhanced expression of defense associated OsCEBiP, OsCERK, OsPAD4, OsNPR1.3, and OsFMO1. The volatile mediated antifungal activity and host defense induction by Chryseobacterium can be a potential alternative to fungicide-based blast management.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.Quality Control of 2-Hexyl-1-decanol It has also been shown to inhibit the growth of Candida glabrata when used as a cationic surfactant.

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Ueland, Maiken;Brown, Amber;Bartos, Cecilia;Frankham, Greta J.;Johnson, Rebecca N.;Forbes, Shari L. published 《Profiling volatilomes: a novel forensic method for identification of confiscated illegal wildlife items》 in 2020. The article was appeared in 《Separations》. They have made some progress in their research.Name: 4-tert-Amylphenol The article mentions the following:

Globally, the rapid decline in wildlife species has many causes. The illegal trafficking of fauna and flora is a major contributor to species decline and continues to grow at an alarming rate. To enable the prosecution of those involved in the trafficking of illegal wildlife, accurate and reliable identification is paramount. Traditionally, morphol. and DNA amplification are used. This paper investigates a novel application of volatilome profiling using comprehensive two-dimensional gas chromatog. coupled with time of flight mass spectrometry for wildlife sample detection. Known samples of elephant-derived ivory, other dentin samples, and bone (a common ivory substitute) were used as reference samples for volatilome profiling. Subsequently, specimens that were suspected ivory from border control seizures were obtained and analyzed. Confirmatory DNA analyses were conducted on seized samples to establish the reliability parameters of volatilome profiling. The volatilome method correctly identified six of the eight seized samples as elephant ivory, which was confirmed through DNA anal. There was also clear distinction of African elephant ivory parts from the bone and dentin samples from other species, as shown through PCA and discriminant analyses. These preliminary results establish volatilome profiling through GCxGC-TOFMS as a novel screening method used for the identification of unknown wildlife contraband. And 4-tert-Amylphenol (cas: 80-46-6) was used in the research process.

4-tert-acylphenol (cas:80-46-6) contains hydroxyl group. Owing to the presence of the polar OH alcohols are more water-soluble than simple hydrocarbons. Methanol, ethanol, and propanol are miscible in water. Butanol, with a four-carbon chain, is moderately soluble.Name: 4-tert-Amylphenol

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Synthetic Route of C10H22OIn 2014, Wang, Yan-ping;Liang, Li-en published 《Determination of volatile aroma components in dahongpao tea and tea brine eggs seasoning packer by SPME-GC/MS》. 《Shipin Gongye Keji》published the findings. The article contains the following contents:

The main volatile aroma components of dahongpao tea and tea brine eggs seasoning packer was extracted by solid phase micro-extraction (SPME) and analyzed by gas chromatog.-mass spectrometry (GC-MS). Results showed that 27 and 56 chengical composition were identified in dahongpao tea extracts and tea brine eggs seasoning packer extracts, they were alc., aldehyde, acids, esters, ene, ketone and heterocyclic compounds containing nitrogen, oxygen, and the main characteristics of volatile aroma components were nerolidol, palmitic acid, peppermint lactate, indole, farnesene, beta-ionone, phenol, orange aldehyde, linalool, benzophenone, etc. By Integral quant. and relative percentage content of the characteristic volatile aroma components in tea brine eggs seasoning packer extracts with dahongpao tea extracts was closely relative to the distribution. 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.Synthetic Route of C10H22O Metabolite observed in cancer metabolism. It has a role as a human metabolite.

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Product Details of 119-47-1《GC-MS analysis of chemical constituents and determination of the total antioxidant capacity of adult powder of Periplaneta americana》 was published in 2022. The authors were Yang, Zhen;Xie, Jiqin;Huang, Feiyun;Yang, Yu;Zhang, Xiuyue;Yue, Bisong, and the article was included in《Entomological Research》. The author mentioned the following in the article:

Edible insects are alternative sources of high protein. Southeast Asia, South America, Africa, and Europe have recorded edible insects and, especially in Europe and America, there are factories that produce insects as food. In some areas of China, there has also been the habit of eating insects since ancient times. Periplaneta americana is an insect with the homol. of medicine and food. In recent years, its medicinal and nutritional functions have attracted extensive attention and research. Its adult powder has been certified as a health product. It not only contains a variety of proteins but also is rich in fatty acids. The composition and antioxidant function of adult powder extract was analyzed in this study. Using adult P. americana powder as the raw material, it was extracted with n-Hexane, dichloromethane, and Et acetate, resp. Gas chromatog.-mass spectrometry (GC-MS) removed a total of 60 compounds, and many active components were extracted from P. americana powder for the first time. The parts and relative content of each extracted sample were obtained, and the total antioxidant capacity (T-AOC) of each extracted piece was determined, among which the antioxidant activity of Et acetate was the highest.2,2-Methylenebis(6-tert-butyl-p-cresol) (cas: 119-47-1) were involved in the experimental procedure.

Product Details of 119-47-12,2′-Methylenebis(4-methyl-6-tert-butylphenol)(CAS: 119-47-1) is a natural product found in Streptomyces and Aspergillus fumigatus .

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Related Products of 599-64-4《Teaching an Old Poly(arylene ether) New Tricks: Efficient Blue Thermally Activated Delayed Fluorescence》 was published in 2019. The authors were Liu, Xinrui;Rao, Jiancheng;Li, Xuefei;Wang, Shumeng;Ding, Junqiao;Wang, Lixiang, and the article was included in《iScience》. The author mentioned the following in the article:

Polymer light-emitting diodes are attractive for optoelectronic applications owing to their brightness and ease of processing. However, often metals have to be inserted to increase the luminescence efficiency, and producing blue emitters is a challenge. Here we present a strategy to make blue thermally activated delayed fluorescence (TADF) polymers by directly embedding a small mol. blue TADF emitter into a poly(aryl ether) (PAE) backbone. Thanks to the oxygen-induced negligible electronic communication between neighboring TADF fragments, its corresponding blue delayed fluorescence can be inherited by the developed polymers. These polymers are free from metal catalyst contamination and show improved thermal stability. Through device optimization, a current efficiency of 29.7 cd/A (21.2 lm/W, 13.2%) is realized together with Commission Internationale de L′Eclairage coordinates of (0.18, 0.32). The value is competitive with blue phosphorescent polymers, highlighting the importance of the PAE backbone in achieving high-performance blue delayed fluorescence at a macromol. level. And 4-(2-Phenylpropan-2-yl)phenol (cas: 599-64-4) was used in the research process.

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

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Formula: C14H14O2In 2021, Jo, Junhyuk;Kim, Seonyul;Choi, Jun-Ho;Chung, Won-jin published 《A convenient pinacol coupling of diaryl ketones with B₂pin₂ via pyridine catalysis》. 《Chemical Communications (Cambridge, United Kingdom)》published the findings. The article contains the following contents:

A convenient, pyridine-boryl radical-mediated pinacol coupling of diaryl ketones is developed. In contrast to the conventional pinacol coupling that requires sensitive reducing metal, the current method employs a stable diboron reagent and pyridine Lewis base catalyst for the generation of a ketyl radical. The newly developed process is operationally simple, and the desired diols, e.g., I are produced with excellent efficiency in up to 99% yield within 1 h. The superior reactivity of diaryl ketone was observed over monoaryl carbonyl compounds and analyzed by DFT calculations, which suggests the necessity of both aromatic rings for the maximum stabilization of the transition states. The experimental procedure involved many compounds, such as rel-(1R,2S)-1,2-Diphenylethane-1,2-diol (cas: 579-43-1) .

rel-(1R,2S)-1,2-Diphenylethane-1,2-diol(cas: 579-43-1 Formula: C14H14O2) has been used in the preparation of trans-methyl meso-hydrobenzoin phosphite.

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