Tag: M.W=200-250

Mhlongo, Msizi I. published the artcileProfiling of Volatile Organic Compounds from Four Plant Growth-Promoting Rhizobacteria by SPME-GC-MS: A Metabolomics Study, Quality Control of 6259-76-3, the main research area is PGPR volatile organic compound metabolomics profiling SPME GCMS; metabolomics profiling; multivariate data analysis (MVDA); plant growth promoting rhizobacteria (PGPR); solid-phase micro-extraction gas chromatography mass spectrometry (SPME–GC–MS); volatile organic compounds (VOCs).

The rhizosphere microbiome is a major determinant of plant health. Plant-beneficial or plant growth-promoting rhizobacteria (PGPR) influence plant growth, plant development and adaptive responses, such as induced resistance/priming. These new eco-friendly choices have highlighted volatile organic compounds (biogenic VOCs) as a potentially inexpensive, effective and efficient substitute for the use of agrochems. Secreted bacterial VOCs are low mol. weight lipophilic compounds with a low b.p. and high vapor pressures. As such, they can act as short- or long-distance signals in the rhizosphere, affecting competing microorganisms and impacting plant health. In this study, secreted VOCs from four PGPR strains (Pseudomonas koreensis (N19), Ps. fluorescens (N04), Lysinibacillus sphaericus (T19) and Paenibacillus alvei (T22)) were profiled by solid-phase micro-extraction gas chromatog. mass spectrometry (SPME-GC-MS) combined with a multivariate data anal. Metabolomic profiling with chemometric analyses revealed novel data on the composition of the secreted VOC blends of the four PGPR strains. Of the 121 annotated metabolites, most are known as bioactives which are able to affect metabolism in plant hosts. These VOCs belong to the following classes: alcs., aldehydes, ketones, alkanes, alkenes, acids, amines, salicylic acid derivatives, pyrazines, furans, sulfides and terpenoids. The results further demonstrated the presence of species-specific and strain-specific VOCs, characterized by either the absence or presence of specific VOCs in the different strains. These mols. could be further investigated as biomarkers for the classification of an organism as a PGPR and selection for agricultural use.

Metabolites published new progress about Alcohols Role: ANT (Analyte), PUR (Purification or Recovery), ANST (Analytical Study), PREP (Preparation). 6259-76-3 belongs to class esters-buliding-blocks, name is Hexyl 2-hydroxybenzoate, and the molecular formula is C13H18O3, Quality Control of 6259-76-3.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Chen, Zhi-Feng published the artcileIdentification of recycled polyethylene and virgin polyethylene based on untargeted migrants, Name: Hexyl 2-hydroxybenzoate, the main research area is virgin polyethylene migration gas chromatog mass spectrometer.

With increasing attention to recycled polyethylene (PE), its safety as a food contact material has become non-negligible. In this study, we report an untargeted gas chromatog. coupled to mass spectrometer (GC-MS) anal. combined with multivariate data anal. for discriminating recycled PE from virgin PE. 80 (semi-)volatile migrants were identified, including 10 hydrocarbons, 29 esters, 3 aldehydes, 9 alcs., 2 ethers, 4 acids, 4 benzene derivatives, 4 ketones, 3 amides, 2 piperazine derivatives and 10 unknowns. The hydrocarbons in virgin samples showed a greater variety and abundance than those in recycled samples. Based on orthogonal partial least squares discriminant anal. (OPLS-DA) and non-parametric test, 38 markers were selected to establish a classification model to identify recycled and virgin PE. These markers mainly derived from additives, daily chem. products related and food related input pollutants, most of which were rich in recycled samples. Furthermore, in classification models, linear discrimination anal. (LDA) showed higher stability and predictability than soft independent modeling of class analogy (SIMCA). The average accuracy of training and prediction set reached 100% and 92%, resp., in LDA model. The identification of recycled PE and virgin PE based on migration of untargeted substances is feasible.

Food Packaging and Shelf Life published new progress about Alcohols Role: ANT (Analyte), FFD (Food or Feed Use), ANST (Analytical Study), BIOL (Biological Study), USES (Uses). 6259-76-3 belongs to class esters-buliding-blocks, name is Hexyl 2-hydroxybenzoate, and the molecular formula is C13H18O3, Name: Hexyl 2-hydroxybenzoate.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Weatherhead, Robin A. published the artcileSynthesis of conformationally constrained diaminodicarboxylic acid derivatives, Category: esters-buliding-blocks, the main research area is aminodicarboxylic di cyclic acid synthesis conformation conformer crystal structure.

Functionally protected forms of three conformationally constrained diaminodicarboxylic acids were synthesized and characterized. 2,2′-Diaminospiro[3.3]heptane-2,2′-dicarboxylic acid, an analog of diaminopimelic acid, was prepared in racemic form and the structure established by X-ray crystallog. anal. of the Me ester hydrochloride. Trans-1,4-Diaminocyclohexane-1,4-dicarboxylic acid was prepared and its structure established by X-ray crystallog. anal. of the corresponding Cbz-protected Et ester. Cis- And trans-2,6-diamino-1,2,3,5,6,7-hexahydro-s-indacene-2,6-dicarboxylic acids were synthesized and the structures assigned by X-ray crystallog. anal. of the corresponding Boc-protected Et ester and Cbz-protected Et ester, resp.

Journal of Organic Chemistry published new progress about Conformation. 37942-79-3 belongs to class esters-buliding-blocks, name is Dimethyl spiro[3.3]heptane-2,6-dicarboxylate, and the molecular formula is C11H16O4, Category: esters-buliding-blocks.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Rodriguez-Sanchez, Isis published the artcileTheoretical evaluation of the order of reactivity of transfer agents utilized in RAFT polymerization: group Z, Recommanded Product: Benzyl diethylcarbamodithioate, the publication is Journal of Molecular Modeling (2009), 15(9), 1133-1143, database is CAplus and MEDLINE.

The authors report theor. calculations, by d. functional theory (DFT), for 28 transfer agents used in reversible addition-fragmentation chain transfer (RAFT) polymerization Functional PBE1PBE and 3-21G^* theory levels with Gaussian 03 software were used to determine the order of reactivity of RAFT agents through the evaluation of reactivity parameters such as global softness, global hardness and global philicity. The global softness of the agent was more favored when it contained benzyl or Ph groups as the Z group, than in RAFT agents with Z groups based on O, N, or S. When the Z group is based on O or N, the tendency to form zwitterionic bonds with the adjacent radical center is very high, causing reactivity reduction in these kinds of compounds (e.g., dithiocarbamates) in comparison with compounds that do not experience this type of event; however, with Z groups based on S, 2 fragmentation paths are possible, which reduces the fragmentation rate since both Z and R can function as leaving groups. With this study the authors contribute to the understanding of RAFT-mediated polymerization mechanisms by proposing an order of reactivity based on evaluating the importance of the Z group.

Journal of Molecular Modeling published new progress about 3052-61-7. 3052-61-7 belongs to esters-buliding-blocks, auxiliary class Amine,Benzene,Amide, name is Benzyl diethylcarbamodithioate, and the molecular formula is C12H17NS2, Recommanded Product: Benzyl diethylcarbamodithioate.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Le Priol, Lorine published the artcileCo-encapsulation of vegetable oils with phenolic antioxidants and evaluation of their oxidative stability under long-term storage conditions, Synthetic Route of 121-79-9, the publication is LWT–Food Science and Technology (2021), 111033, database is CAplus.

The aim of this study is to evaluate the feasibility of edible oils co-encapsulation with antioxidants in a natural protein matrix obtained using the spray-drying method, and to demonstrate the long-term stability of microparticles. Sunflower and flaxseed oils were encapsulated in pea protein isolate (PP) with a hydrophilic antioxidant, Pr gallate (PG), and a lipophilic antioxidant, α-tocopherol (α-T). Samples with encapsulated oil and the corresponding unencapsulated oil were then stored at 25°C for up to 10 mo (300 days) to monitor the long-term oxidative stability. The results demonstrated that microencapsulation, the addition of antioxidants, as well as the nature of the oil all affected the oxidative stability of oils. The addition of PG made it possible the increase in oil stability during the total storage period, whereas α-T had a pro-oxidant effect and induced the decrease in oil resistivity to oxidation The pos. effect of PG was more pronounced for short storage times (t < 100 days). Flaxseed oil, which is more sensitive to oxidation, showed slower oxidation kinetic after encapsulation compared to sunflower oil. The proposed encapsulation method may be an efficient approach for enhancing oxidative stability of edible oils for functional food powders.

LWT–Food Science and Technology published new progress about 121-79-9. 121-79-9 belongs to esters-buliding-blocks, auxiliary class Natural product, name is Propyl 3,4,5-trihydroxybenzoate, and the molecular formula is C10H12O5, Synthetic Route of 121-79-9.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Nudelman, Abraham published the artcileProdrugs of butyric acid. Novel derivatives possessing increased aqueous solubility and potential for treating cancer and blood diseases, HPLC of Formula: 122110-53-6, the publication is European Journal of Medicinal Chemistry (2001), 36(1), 63-74, database is CAplus and MEDLINE.

The synthesis and biol. activities of acidic, basic and neutral types of butyric acid (BA) prodrugs possessing increased aqueous solubility are described. The compounds are butyroyloxyalkyl derivatives of carboxylic acids, which possess functionalities suitable for aqueous solubilization. The anticancer activity of the prodrugs in vitro was evaluated by examining their effect on the growth of human colon, breast and pancreatic carcinoma cell lines, and their solubility in aqueous media was determined The most promising compounds, with respect to activity and solubility, were the butyroyloxymethyl esters of glutaric and nicotinic acids and phosphoric acid as its di-Et ester, which displayed IC₅₀ values of 100 μM or lower. These prodrugs are expected to release formaldehyde upon metabolic hydrolysis. The corresponding butyroyloxymethyl esters that release acetaldehyde upon metabolism were significantly less potent. A similar correlation was observed for growth inhibition of the human prostate carcinoma cell lines PC-3 and LnCap and for induction of differentiation and apoptosis in the human myeloid leukemia cell line HL-60. The higher biol. activity of the formaldehyde-releasing prodrugs I and II was further confirmed when induction of Hb synthesis in the human erythroleukemic cell line K562 was measured. Moreover, a therapeutic index (IC₅₀/ED₅₀) of 5 was observed The acute i.p. toxicity LD₅₀ in mice for I, III, II and IV was similar and in the range of 400-600 mg kg^-1. The results obtained support the potential use of the butyric acid prodrugs for the treatment of neoplastic diseases and β-globin disorders.

European Journal of Medicinal Chemistry published new progress about 122110-53-6. 122110-53-6 belongs to esters-buliding-blocks, auxiliary class Aliphatic hydrocarbon chain,Ester,Inhibitor, name is (Pivaloyloxy)methyl butyrate, and the molecular formula is C10H18O4, HPLC of Formula: 122110-53-6.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

El-Sayed, Ashraf published the artcileCharacterization of pheromone blend for grapevine moth, Lobesia botrana by using flight track recording, HPLC of Formula: 16974-11-1, the publication is Journal of Chemical Ecology (1999), 25(2), 389-400, database is CAplus.

The behavioral responses of Lobesia botrana males to calling females, pheromone gland extracts, and synthetic sex pheromones were recorded in a wind tunnel. Gland extracts and synthetic pheromones were released from a pheromone evaporator. The numbers of males reaching the source and their flight tracks in response to calling females and pheromone gland extracts were compared to those of synthetic blends. Upwind flights to natural sex pheromone were straighter and faster than to a three-component blend of (E)-7,(Z)-9-dodecadienyl acetate (E7,Z9-12: Ac), (E)-7,(Z)-9-dodecadien-I-ol (E7,Z-12: OH), and (Z)-9-docecenyl acetate (Z9-12: Ac) (100:20:5). The optimum ratio of E7,Z9-12:OH and Z9-12:Ac to E7,Z9-12:Ac was found to be 5% and 1%, resp. An addnl. seven compounds identified in the sex pheromone gland were investigated for their biol. activity. Two unsaturated acetates, i.e., (E)-9-dodecenyl acetate (E9-12:Ac) and Δ11-dodecenyl acetate (Δ11-12:Ac), increased the number of males reaching the source as well as straightness, linear velocity, and decreased the track angle of upwind flight. Optimum response was obtained by releasing 10 pg/min E7,Z9-12:Ac in a mixture with 0.5 pg/min E7,Z9-12:OH, 0.1 pg/min Z9-12:Ac 0.1 pg/min E9-12:Ac and 1 pg/min Δ11-12-Ac. The saturated acetates previously identified in the female glands were biol. inactive.

Journal of Chemical Ecology published new progress about 16974-11-1. 16974-11-1 belongs to esters-buliding-blocks, auxiliary class Aliphatic Chain, name is (Z)-Dodec-9-en-1-yl acetate, and the molecular formula is C14H26O2, HPLC of Formula: 16974-11-1.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Haenniger, Sabine published the artcileSexual communication of Spodoptera frugiperda from West Africa: Adaptation of an invasive species and implications for pest management, Recommanded Product: (Z)-Dodec-9-en-1-yl acetate, the publication is Scientific Reports (2020), 10(1), 2892, database is CAplus and MEDLINE.

Abstract: The pest species Spodoptera frugiperda, which is native to North and South America, has invaded Africa in 2016. The species consists of two strains, the corn-strain and rice-strain, which differ in their sexual communication. When we investigated populations from Benin and Nigeria, consisting of corn-strain and rice-corn-hybrid descendants, we found no strain-specific sexual communication differences. Both genotypes exhibited the same pheromone composition, consisting of around 97% (Z)-9-tetradecenyl acetate (Z9-14:Ac), 2% (Z)-7-dodecenyl acetate (Z7-12:Ac), and 1% (Z)-9-dodecenyl acetate (Z9-12:Ac), they had similar electrophysiol. responses, and all mated around three hours into scotophase. However, we found geog. variation between African and American populations. The sex pheromone of African corn-strain and hybrid descendant females was similar to American rice-strain females and showed higher percentages of the male-attracting minor component Z7-12:Ac. In addition, African males exhibited the highest antennal sensitivity towards Z7-12:Ac, while American males showed highest sensitivity towards the major pheromone component Z9-14:Ac. Increasing the production of and response to the critical minor component Z7-12:Ac may reduce communication interference with other African Spodoptera species that share the same major pheromone component. The implications of our results on pheromone-based pest management strategies are discussed.

Scientific Reports published new progress about 16974-11-1. 16974-11-1 belongs to esters-buliding-blocks, auxiliary class Aliphatic Chain, name is (Z)-Dodec-9-en-1-yl acetate, and the molecular formula is C14H26O2, Recommanded Product: (Z)-Dodec-9-en-1-yl acetate.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Bruusgaard-Mouritsen, Maria A. published the artcileFacial contact dermatitis caused by cosmetic-relevant allergens, Product Details of C10H12O5, the publication is Contact Dermatitis (2021), 85(6), 650-659, database is CAplus and MEDLINE.

Facial allergic contact dermatitis caused by cosmetic products is common. New allergens in cosmetics continuously emerge. To investigate characteristics of patients with facial dermatitis (FD) between 2010 and 2019 including patch test results from cosmetic-related allergens and a new test series with cosmetic-relevant natural ingredients (CRNIs). This is a retrospective study analyzing demographics, clin. characteristics according to MOAHLFA index (male; occupation; atopic dermatitis; hand; leg; face; age ≥ 40 years), and patch test results to 27 cosmetic-relevant allergens in FD patients. A prospective study evaluating a screening test series with CRNIs in consecutive FD patients for 1 yr was also conducted. These patients received a questionnaire for collecting extra characteristics (eg, concerning quality of life). Of 8740 tested patients, 2292 (26.2%) had FD. Of these, 30.6% had cosmetic-induced FD. The most common cosmetic-related allergens were fragrances and preservatives. The most common patch test-pos. CRNIs were hydroperoxides of limonene and linalool, and propolis. Potato and peanut were rare, but the most common prick test-pos. CRNIs, however, without any relation to the use of cosmetic products. FD affected nearly all patients′ quality of life and caused limitations to their daily life. Updated management and quick diagnosis of FD is important to avoid neg. impact on patients′ quality of life.

Contact Dermatitis published new progress about 121-79-9. 121-79-9 belongs to esters-buliding-blocks, auxiliary class Natural product, name is Propyl 3,4,5-trihydroxybenzoate, and the molecular formula is C10H12O5, Product Details of C10H12O5.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Bai, Feng published the artcileSynthesis of a biphenyl-containing, achiral, V-shaped liquid crystalline polyester, SDS of cas: 50670-76-3, the publication is Polymer Preprints (American Chemical Society, Division of Polymer Chemistry) (1999), 40(2), 878-879, database is CAplus.

A new V-shaped liquid crystalline monomer 1,3-Ph bis[4′-(11-hydroxyundecanyloxy)-4-biphenyl]carboxylate was synthesized from 4′-hydroxy-4-biphenylcarboxylic acid, resorcinol, and 11-bromo-1-undecanol. The polymer was prepared by condensing monomer with isophthalic acid under mild condition using 1,3-dicyclohexylcarbodiimide as condensing reagent in the presence of N,N-dimethylaminopyridinium toluenesulfonate.

Polymer Preprints (American Chemical Society, Division of Polymer Chemistry) published new progress about 50670-76-3. 50670-76-3 belongs to esters-buliding-blocks, auxiliary class Benzene,Phenol,Ester, name is Ethyl 4′-hydroxy-[1,1′-biphenyl]-4-carboxylate, and the molecular formula is C15H14O3, SDS of cas: 50670-76-3.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics