Category: esters-buliding-blocks

Cazares-Samaniego, Paulina J. published the artcileVolatilome and Essential Oil of Ulomoides dermestoides: A Broad-Spectrum Medical Insec, Category: esters-buliding-blocks, the main research area is Ulomoides volatilome essential oil; GC-MS; HS-SPME; PBET; Ulomoides dermestoides; VOCs; essential oils; insect.

Ulomoides dermestoides are used as a broad-spectrum medical insect in the alternative treatment of various diseases. Preliminary volatilome studies carried out to date have shown, as the main components, methyl-1,4-benzoquinone, ethyl-1,4-benzoquinone, 1-tridecene, 1-pentadecene, and limonene. This work focused on the production of metabolites and their metabolic variations in U. dermestoides under stress conditions to provide addnl. valuable information to help better understand the broad-spectrum medical uses. To this end, VOCs were characterized by HS-SPME with PEG and CAR/PDMS fibers, and the first reported insect essential oils were obtained. In HS-SMPE, we found 17 terpenes, six quinones, five alkenes, and four aromatic compounds; in the essential oils, 53 terpenes, 54 carboxylic acids and derivatives, three alkynes, 12 alkenes (1-Pentadecene, EOT1: 77.6% and EOT2: 57.9%), 28 alkanes, nine alkyl disulfides, three aromatic compounds, 19 alcs., three quinones, and 12 aldehydes were identified. Between both study approaches, a total of 171 secondary metabolites were identified with no previous report for U. dermestoides. A considerable number of the identified metabolites showed previous studies of the activity of pharmacol. interest. Therefore, considering the wide variety of activities reported for these metabolites, this work allows a broader vision of the therapeutic potential of U. dermestoides in traditional medicine.

Molecules published new progress about Drugs. 6259-76-3 belongs to class esters-buliding-blocks, name is Hexyl 2-hydroxybenzoate, and the molecular formula is C13H18O3, Category: esters-buliding-blocks.

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

Buras, Zachary J. published the artcileSimulated production of OH, HO2, CH2O, and CO2 during dilute fuel oxidation can predict 1st-stage ignition delays, Quality Control of 110-42-9, the main research area is hydroxyl hydroperoxo formaldehyde fuel oxidation autoignition plug flow reactor.

Chem. kinetics simulations are used to explore whether detailed measurements of relevant chem. species during the oxidation of very dilute fuels (less than 1 Torr partial pressure) in a high-pressure plug flow reactor (PFR) can predict autoignition propensity. We find that for many fuels the timescale for the onset of spontaneous oxidation in dilute fuel/air mixtures in a simple PFR is similar to the 1st-stage ignition delay time (IDT) at stoichiometric engine-relevant conditions. For those fuels that deviate from this simple trend, the deviation is closely related to the peak rate of production of OH, HO2, CH2O, and CO2 formed during oxidation We use these insights to show that an accurate correlation between simulated profiles of these species in a PFR and 1st-stage IDT can be developed using convolutional neural networks. Our simulations suggest that the accuracy of such a correlation is 10-50%, which is appropriate for rapid fuel screening and may be sufficient for predictive fuel performance modeling.

Combustion and Flame published new progress about Fuels. 110-42-9 belongs to class esters-buliding-blocks, name is Methyl decanoate, and the molecular formula is C11H22O2, Quality Control of 110-42-9.

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

Capozzi, Vittorio published the artcileImpact of co-inoculation of Saccharomyces cerevisiae, Hanseniaspora uvarum and Oenococcus oeni autochthonous strains in controlled multi starter grape must fermentations, Recommanded Product: Ethyl octanoate, the main research area is Saccharomyces Hanseniaspora Oenococcus grape must fermentation enol technol property.

The use of multi-species starter cultures is an approach of increasing significance for winemakers in order to improve the general quality and safety of the final product. As first step of the present study, we isolated and characterize two Saccharomyces cerevisiae yeast starter strains, denoted as ITEM 167292 and ITEM 17293, from natural must fermentations of “”Negroamaro”” grapes. As second step, we studied the interactions during grape must fermentation between these two strains, the Hanseniaspora uvarum strain ITEM 8785 and five autochthonous Oenococcus oeni strains, by microbial counts and by quantifying L-malic acid and ethanol concentrations The best performing O. oeni strain, namely OT4, was used to create, with the H. uvarum strain ITEM 8785, two mixed starter formulations with the strains ITEM 167292 and ITEM 17293. The three microbial species showed to be compatible and to complete the fermentative processes producing wines denoted by reduced acetic acid concentrations The performance of the mixed starter formulations were then validated by carrying pilot-scale vinifications. At the best of our knowledge, this report is the first study regarding the utilization of selected H. uvarum/S. cerevisiae/O. oeni autochthonous strains in a simultaneous multi-starter inoculation for the industrial production of regional typical wines.

LWT–Food Science and Technology published new progress about Grape. 106-32-1 belongs to class esters-buliding-blocks, name is Ethyl octanoate, and the molecular formula is C10H20O2, Recommanded Product: Ethyl octanoate.

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

Qian, Xu published the artcileAlcohol acyltransferase gene and ester precursors differentiate composition of volatile esters in three interspecific hybrids of Vitis labrusca × V. Vinifera during berry development period, Recommanded Product: Ethyl 3-hydroxybutanoate, the main research area is alc acyltransferase gene ester precursor Vitis hybrid berry development; Alcohol acyltransferase; Ester precursors; Esters; Grape varieties; Transcriptome analysis.

This study investigated the accumulation of esters in three hybrid grape cultivars during berry development under two vintages to elucidate the differentiation on their esters biosynthesis. Results showed ‘Moldova’ showed lower esters content than ‘Campbell Early’ and ‘Catawba’ resulting from its limited AAT gene expression and 20 different encoded amino acids. The volatile esters compositions of ‘Campbell Early’ and ‘Catawba’ in both vintages were different. Correlation anal. revealed that concentrations of hexyl acetate, 2-phenethyl acetate, Et (E,E)-2,4-hexadienoate and Et phenylacetate were related to their corresponding alcs. level, whereas threonine and alanine affected Et heptanoate formation. Transcriptome anal. indicated that 1847, 1781 and 1870 DEGs, at E-L 35, 36 and 38, resp., were characterized between ‘Campbell Early’ and ‘Catawba’. The expression level of genes related to the volatile ester precursors biosynthesis, including PRX-VIT_211s0016g05320, PAO-VIT_217s0000g09100, ACOX-VIT_212s0028g02660, ACOX-VIT_216s0022g01120, echA-VIT_205s0077g00860 and ACOX-VIT_200s0662g00010, exhibited a pos. correlation to the concentrations of their corresponding volatile esters.

Food Chemistry published new progress about Grape. 5405-41-4 belongs to class esters-buliding-blocks, name is Ethyl 3-hydroxybutanoate, and the molecular formula is C6H12O3, Recommanded Product: Ethyl 3-hydroxybutanoate.

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

Furdikova, Katarina published the artcileComparison of volatiles in noble-rotten and healthy grape berries of Tokaj, SDS of cas: 110-42-9, the main research area is Vitis glycerol ethanol citric gluconic succinic acid.

The presented work compares basic parameters as well as comprehensive profiles of volatile organic compounds identified in healthy and noble-rotten grape berries of 6 Tokaj grapevine varieties (Muscat Lunel, Furmint, Lipovina, Zet́a, Kabar and Fat grape). Volatile components were determined by GC × GC-HRTOF-MS with previous solid phase microextraction of volatiles from head space and expressed as relative concentrations The greatest differences between the basic composition of healthy and noble-rotten grapes were found in glycerol, ethanol, citric, gluconic and succinic acid. 116 volatile compounds were identified and compared in scope of their ability to distinguish healthy and noble-rotten berries in context of aromatic or non-aromatic variety. Regardless of grapevine variety, 59 compounds significantly distinguished noble rot from healthy berries whereby the most important were 2-hepten-1-ol, 2-octen-1-ol, hexadecanoic acid, 3,5-octadien-2-one, sulcatol and hexyl acetate. Volatile profiles of healthy as well as noble-rotten berries of aromatic variety Muscat Lunel differed from non-aromatic ones and were characterized mostly by higher relative concentrations of terpenoids neo-allo ocimene, cis-rose oxide, linalool, nerol oxide and sulcatol.

LWT–Food Science and Technology published new progress about Grape. 110-42-9 belongs to class esters-buliding-blocks, name is Methyl decanoate, and the molecular formula is C11H22O2, SDS of cas: 110-42-9.

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

Furdikova, Katarina published the artcileComparison of volatiles in noble-rotten and healthy grape berries of Tokaj, COA of Formula: C9H18O2, the main research area is Vitis glycerol ethanol citric gluconic succinic acid.

The presented work compares basic parameters as well as comprehensive profiles of volatile organic compounds identified in healthy and noble-rotten grape berries of 6 Tokaj grapevine varieties (Muscat Lunel, Furmint, Lipovina, Zet́a, Kabar and Fat grape). Volatile components were determined by GC × GC-HRTOF-MS with previous solid phase microextraction of volatiles from head space and expressed as relative concentrations The greatest differences between the basic composition of healthy and noble-rotten grapes were found in glycerol, ethanol, citric, gluconic and succinic acid. 116 volatile compounds were identified and compared in scope of their ability to distinguish healthy and noble-rotten berries in context of aromatic or non-aromatic variety. Regardless of grapevine variety, 59 compounds significantly distinguished noble rot from healthy berries whereby the most important were 2-hepten-1-ol, 2-octen-1-ol, hexadecanoic acid, 3,5-octadien-2-one, sulcatol and hexyl acetate. Volatile profiles of healthy as well as noble-rotten berries of aromatic variety Muscat Lunel differed from non-aromatic ones and were characterized mostly by higher relative concentrations of terpenoids neo-allo ocimene, cis-rose oxide, linalool, nerol oxide and sulcatol.

LWT–Food Science and Technology published new progress about Grape. 111-11-5 belongs to class esters-buliding-blocks, name is Methyl octanoate, and the molecular formula is C9H18O2, COA of Formula: C9H18O2.

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

Fan, Shanshan published the artcileCharacterization of the potent odorants in Tibetan Qingke Jiu by sensory analysis, aroma extract dilution analysis, quantitative analysis and odor activity values, Product Details of C10H20O2, the main research area is Tibetan Qingke Jiu sensory odorants; AEDA; Acetic acid (PubChem, CID: 176); Aroma active compounds; Ethyl 2-methylbutanoate (PubChem, CID: 24020); Ethyl 3-methylbutanoate (PubChem, CID: 7945); Furaneol (PubChem, CID: 19309); Methional (PubChem, CID: 18635); OAVs; Phenylacetaldehyde (PubChem, CID: 998); Quantitative analysis; Sensory analysis; Sotolon (PubChem, CID: 62835); Tibetan Qingke Jiu; β-Damascenone (PubChem, CID: 5366074); β-Phenylethanol (PubChem, CID: 6054); γ-Nonalactone (PubChem, CID: 7710).

Tibetan Qingke Jiu is the most important alc. beverage in the daily life of Tibetan people due to its unique flavor and rich nutrients. In this study, the aromatic characteristics of Qingke Jiu were studied by sensory anal., aroma extract dilution anal. (AEDA), quant. anal., and odor activity values (OAVs). Sensory evaluation demonstrated that Qingke Jiu had fruity, cooked potato, honey, sour, sweet, and caramel-like aroma. A total of 66 aroma compounds were identified by AEDA and gas chromatog.-mass spectrometry, with flavor dilution (FD) factors ranging from 4 to 2048. Among them, methional, acetic acid, Et butanoate, phenylacetaldehyde and U+03B2-phenylethanol appeared with the highest FD factors. The concentration of these aroma-active compounds was further quantitated by combination of four different quant. measurements, and 17 odorants had concentrations higher than their odor thresholds. Based on the OAVs, phenylacetaldehyde, U+03B2-phenylethanol, Et phenylacetate, sotolon, furaneol, methional, methionol, U+03B3-nonalactone, Et 2-methylbutanoate, U+03B2-damascenone, Et 3-methylbutanoate, Et acetate, Et butanoate, and acetic acid could be potentially important to the overall aroma profile of Qingke Jiu.

Food Research International published new progress about Honey. 106-32-1 belongs to class esters-buliding-blocks, name is Ethyl octanoate, and the molecular formula is C10H20O2, Product Details of C10H20O2.

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

Laghari, Saif-ul-Rehman published the artcileAssessment of drug utilization of antimicrobials in different infectious diseases at various clinics of Sanghar, Pakistan, Category: esters-buliding-blocks, the main research area is antimicrobials infectious diseases metronidazole.

The aim was to assess the frequency of antimicrobial medications in various diseases at clin. setups. This study was conducted for a period of six months from Apr. 2019 to Sept. 2019. A total of 10 Clin. setups were part of this study including the OPDs of general practitioners. A total of 1000 prescription were collected by purposive sampling. A specially designed data form was used for collecting the data The data were analyzed and compared with WHO guidelines. A drug utilization study of antimicrobial agents was carried out from 1000 prescriptions. A total of 1060 antimicrobial medications were prescribed. Mostly observed patients with microbial infection came from 51-60 years of age group. Most common observed microbial diseases are upper respiratory tract infections (22.4%), acute gastroenteritis (20.2%) and urinary tract infections (16.4%). The percentage of drugs prescribed with the generic name was only 10%. This study showed that only 31.5% patients tested from laboratory for disease diagnosis. Among the wide range of antimicrobials, antibiotics were the most common prescribed drug i.e. 68% of total antimicrobial drugs. Most commonly prescribed antibiotic drugs were Co-amoxiclave (26.8%) followed by levofloxacin (18.5%), and ciprofloxacin (17.6%). Most commonly used antiprotozoal drug was metronidazole i.e. 60% of total prescribed antiprotozoal drugs, while commonly prescribed anti-fungal drug was fluconazole i.e. 44.2% of total prescribed antifungal drugs and most commonly antiviral drug was Acyclovir i.e. 46%. As compared with WHO guidelines, the utilization of Injectable was on higher side i.e. 28%. The conclusion revealed that drug utilization practice was not appropriate in accordance to WHO prescribing indicators. Polypharmacy and over prescriptions of antimicrobials was too high which leads to poor treatment outcomes and high economic burden on patients. Irrational drugs therapy is one of the top leading causes of death in developing countries including Pakistan and the results of our study also agree with the above fact.

Latin American Journal of Pharmacy published new progress about Acne. 55981-09-4 belongs to class esters-buliding-blocks, name is 2-((5-Nitrothiazol-2-yl)carbamoyl)phenyl acetate, and the molecular formula is C12H9N3O5S, Category: esters-buliding-blocks.

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

Chizzola, Remigius published the artcileVariability of volatiles in Pinus cembra L. within and between trees from a stand in the Salzburg Alps (Austria) as assessed by essential oil and SPME analysis, Related Products of esters-buliding-blocks, the main research area is Pinus cembra volatile essential oil SPME analysis.

Pinus cembra L. is a coniferous European mountain range tree rich in oleoresins and essential oils. Twig tips with needles are the most common tree parts used to obtain essential oils. As the whole tree contains volatiles, the essential oil composition from different parts was studied, including twig tips with needles from the bottom, the top and the cone bearing branches, cones, twigs without needles from the lower and upper part of the crown as well as wood and bark from the trunk. The variability in essential oil composition between these plant parts and between individual trees has been studied using multivariate statistical analyses. α-Pinene was present in all samples, being highest in cones (49.3%) and lowest in sapwood (0.7%). Twig tips with needles from different parts of the crown had similar essential oil composition with α-pinene (43.9-48.3%), β-phellandrene (13.1-17.2%), β-pinene (6.6-9.3%), germacrene D (5.1-6.8%) and limonene (4.1-6.1%) as main compounds Twig essential oils had usually more β;-phellandrene (23.9-29.8%) than α-pinene (23.3-24.3%) and also appreciable amounts of β-pinene (13.5-15.1%) and limonene (11.9-17.9%). Cone essential oils contained mainly α-pinene, β-pinene (20.1%) and limonene (13.9%). The essential oils from wood and bark were rich in diterpenes as cembratrienol (4.9-21.4%), cembrene (4.8-14.3%) and Me daniellate (2.7-6.8%). Sapwood distillates contained also notable amounts of alkane derivatives Finally, the solventfree SPME technique has been employed to analyze the volatiles in the plant parts. For needles and cones the observed patterns were in good accordance with the compositions of the resp. essential oils.

Genetic Resources and Crop Evolution published new progress about Bark. 110-42-9 belongs to class esters-buliding-blocks, name is Methyl decanoate, and the molecular formula is C11H22O2, Related Products of esters-buliding-blocks.

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

Hassan, Amir published the artcileIdentification of fatty acids and fatty acid esters from ethyl acetate bark extract of holoptelea integrifolia (roxb.) planch by GC-MS, Synthetic Route of 929-77-1, the main research area is Holoptelea bark extract fatty acid octadecanoicacid eicosanoicacid methyl ester.

It is an ornamental plant with certain medicinal characteristics due to many valuable and active Phytoconstituents in various parts of the plant. Et acetate extract of the bark was triturated with warm nhexane and warm n-hexane fractions were pooled in order to get Holoptelea integrifolia Bark-Ehyl Acetate-Hexane Soluble (HIB-EAHS) which was analyzed on GC-MS. The identified fatty acids and fatty acid esters included: octadecanoicacid, Me ester (1), hexadecanedioic acid, di-Me ester (2), eicosanoic acid, methylester (3), octadecanedioic acid, di-Me ester (4), Cis-13-eicosenoic acid (5), docosanoicacid, Me ester (6), 1,2-benzenedicarboxylicacid, diisooctyl ester (7), methyl- 21-methyldocosanoate (8), and tetracosanoicacid, Me ester (9). Not any saturated fatty acid was found in the present study. A number of fatty acids and fatty acid esters have been identified from the stem extract of H. integrifolia but these fatty acids and fatty acid esters were identified the first time from the bark of the plant.

World Journal of Pharmacy and Pharmaceutical Sciences published new progress about Bark. 929-77-1 belongs to class esters-buliding-blocks, name is Methyl docosanoate, and the molecular formula is C23H46O2, Synthetic Route of 929-77-1.

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