Category: 106-73-0

Comparison of volatile components from Maca extracted by headspace solid phase microextraction and steam distillation was written by Zhang, Pengyun;Li, Rong;Li, Haoyang;Chen, Lisi;Zhang, Feng. And the article was included in Shipin Keji in 2018.Category: esters-buliding-blocks The following contents are mentioned in the article:

Objective: To compare headspace solid-phase microextraction (HS-SPME) and steam distillation (SD) in the extraction of volatile components composition and differences from Maca in Lijiang, Yunnan. Methods: GC-MS and GC-QTOF-MS were used to detect and analyze the extracts of the two methods resp. Result: A total of 70 components were detected in the HS-SPME extract, and 54 components were identified, accounting for 95.16% of the total peak area of the volatile substances, mainly including nitriles (61.49%), esters (15.25%), aldehydes (9.86%) and pyrazine (1.27%). A total of 74 components were detected in the SD extract, and 39 components were identified, accounting for 97.40% of the total peak area of volatile substances, mainly including nitriles (90.33%), aldehydes (5.04%) and esters (1.62%), of which there were 16 common components, and the highest content of all components are phenylacetonitrile. Conclusion: There were certain differences in the composition and content of the volatile components extracted from Maca by the two methods, in which the extraction effect of HS-SPME was relatively good, which could be applied to the rapid detection of volatile components in Maca. This study involved multiple reactions and reactants, such as Methyl heptanoate (cas: 106-73-0Category: esters-buliding-blocks).

Methyl heptanoate (cas: 106-73-0) belongs to esters. Esters are also usually derived from carboxylic acids. It may also be obtained by reaction of acid anhydride or acid halides with alcohols or by the reaction of salts of carboxylic acids with alkyl halides. Because of their lack of hydrogen-bond-donating ability, esters do not self-associate. Consequently, esters are more volatile than carboxylic acids of similar molecular weight.Category: esters-buliding-blocks

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

QSAR Models for Predicting Aquatic Toxicity of Esters Using Genetic Algorithm-Multiple Linear Regression Methods was written by Rajabi, Mehdi;Shafiei, Fatemeh. And the article was included in Combinatorial Chemistry & High Throughput Screening in 2019.Product Details of 106-73-0 The following contents are mentioned in the article:

Esters are of great importance in industry, medicine, and space studies. Therefore, studying the toxicity of esters is very important. In this research, a Quant. Structure-Activity Relationship (QSAR) model was proposed for the prediction of aquatic toxicity (log 1/IGC50) of aliphatic esters towards Tetrahymena pyriformis using mol. descriptors. A data set of 48 aliphatic esters was separated into a training set of 34 compounds and a test set of 14 compounds A large number of mol. descriptors were calculated with Dragon software. The Genetic Algorithm (GA) and Multiple Linear Regression (MLR) methods were used to select the suitable descriptors and to generate the correlation models that relate the chem. structural features to the biol. activities. The predictive powers of the MLR models are discussed by using Leave-One-Out (LOO) cross-validation and external test set. The best QSAR model is obtained with R2 value of 0.899, Q² LOO = 0.928, F = 137.73, RMSE = 0.263. The predictive ability of the GA-MLR model with two selected mol. descriptors is satisfactory and it can be used for designing similar group and predicting of toxicity (log 1/IGC50) of ester derivatives This study involved multiple reactions and reactants, such as Methyl heptanoate (cas: 106-73-0Product Details of 106-73-0).

Methyl heptanoate (cas: 106-73-0) belongs to esters. Esters are widespread in nature and are widely used in industry. In nature, fats are in general triesters derived from glycerol and fatty acids. Esters are responsible for the aroma of many fruits, including apples, durians, pears, bananas, pineapples, and strawberries. Esters are more polar than ethers but less polar than alcohols. They participate in hydrogen bonds as hydrogen-bond acceptors, but cannot act as hydrogen-bond donors, unlike their parent alcohols. This ability to participate in hydrogen bonding confers some water-solubility.Product Details of 106-73-0

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

Amphiphilic block copolymer PCL-PEG-PCL as stationary phase for capillary gas chromatographic separations was written by Sun, Tao;Shuai, Xiaomin;Ren, Kaixin;Jiang, Xingxing;Chen, Yujie;Zhao, Xinyu;Song, Qianqian;Hu, Shaoqiang;Cai, Zhiqiang. And the article was included in Molecules in 2019.Product Details of 106-73-0 The following contents are mentioned in the article:

This work presents the first example of utilization of amphiphilic block copolymer PCL-PEG-PCL as a stationary phase for capillary gas chromatog. (GC) separations The PCL-PEG-PCL capillary column fabricated by static coating provides a high column efficiency of 3951 plates/m for n-dodecane at 120 °C. McReynolds constants and Abraham system constants were also determined in order to evaluate the polarity and possible mol. interactions of the PCL-PEG-PCL stationary phase. Its selectivity and resolving capability were investigated by using a complex mixture covering analytes of diverse types and positional, structural, and cis-/trans-isomers. Impressively, it exhibits high resolution performance for aliphatic and aromatic isomers with diverse polarity, including those critical isomers such as butanol, dichlorobenzene, dimethylnaphthalene, xylenol, dichlorobenzaldehyde, and toluidine. Moreover, it was applied for the determination of isomer impurities in real samples, suggesting its potential for practical use. The superior separation performance demonstrates the potential of PCL-PEG-PCL and related block copolymers as stationary phases in GC and other separation technologies. This study involved multiple reactions and reactants, such as Methyl heptanoate (cas: 106-73-0Product Details of 106-73-0).

Methyl heptanoate (cas: 106-73-0) belongs to esters. Esters perform as high-grade solvents for a broad array of plastics, plasticizers, resins, and lacquers, and are one of the largest classes of synthetic lubricants on the commercial market. Acyl chlorides and acid anhydrides alcoholysis is another way to produce esters. Acyl chlorides and acid anhydrides react with alcohols to produce esters. Anydrous conditions are recommended since both acyl chlorides and acid anhydrides react with water.Product Details of 106-73-0

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

Chemotyping of new hop (Humulus lupulus L.) genotypes using comprehensive two-dimensional gas chromatography with quadrupole accurate mass time-of-flight mass spectrometry was written by Yan, Dan Dan;Wong, Yong Foo;Tedone, Laura;Shellie, Robert A.;Marriott, Philip J.;Whittock, Simon P.;Koutoulis, Anthony. And the article was included in Journal of Chromatography A in 2018.Related Products of 106-73-0 The following contents are mentioned in the article:

Comprehensive two-dimensional gas chromatog. with quadrupole accurate mass time-of-flight mass spectrometry (GC × GC-Q-TOFMS) is employed to profile Humulus lupulus L. (hop) essential oils. Comparison of characterized essential oils allows discrimination among chemotypes. Exptl. and com. hop genotypes displayed distinguishable chemotypic patterns among the volatile secondary metabolites making up their essential oils. In total, 210-306 unique compounds were detected (depending on specific genotype), with 99 of these compounds either pos. or tentatively identified. Identified volatile secondary metabolites were grouped into esters, monoterpene hydrocarbons, oxygenated monoterpenes, sesquiterpene hydrocarbons, oxygenated sesquiterpenes and ketones. Terpenoids were the dominant chem. families across all hop genotypes analyzed, representing between 67% and 90% of the total ion count. The multidimensional chromatog. profiles of hop essential oils are extremely information-rich, making GC × GC-Q-TOFMS useful for fast screening of new hybrid hop genotypes, and therefore informing breeding strategies to derive new com. hop cultivars for the development of distinctive and desirable beers. This study involved multiple reactions and reactants, such as Methyl heptanoate (cas: 106-73-0Related Products of 106-73-0).

Methyl heptanoate (cas: 106-73-0) belongs to esters. Esters are also usually derived from carboxylic acids. It may also be obtained by reaction of acid anhydride or acid halides with alcohols or by the reaction of salts of carboxylic acids with alkyl halides. Many esters have the potential for conformational isomerism, but they tend to adopt an s-cis (or Z) conformation rather than the s-trans (or E) alternative, due to a combination of hyperconjugation and dipole minimization effects. The preference for the Z conformation is influenced by the nature of the substituents and solvent, if present. Lactones with small rings are restricted to the s-trans (i.e. E) conformation due to their cyclic structure.Related Products of 106-73-0

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

Structural characterization and aquatic toxicity prediction of esters was written by Li, Jian-Feng;Liao, Li-Min. And the article was included in Chinese Journal of Structural Chemistry in 2021.Recommanded Product: Methyl heptanoate The following contents are mentioned in the article:

Based on the three-dimensional structures of the compounds, the structures of 48 ester compounds were expressed parametrically. Through multiple linear regression and partial least-squares regression, the relationship models between ester compound structures and aquatic toxicity log(1/IGC50) were established. The correlation coefficients (R2) of the models were 0.9974 and 0.9940, and the standard deviations (SD) were 0.0469 and 0.0646, resp. The stability of the models was evaluated by the leave-one-out internal cross-test. The correlation coefficients (RCV2) of the models of interactive tests were 0.9939 and 0.8952, and the standard deviation (SDCV) was 0.0715 and 0.0925, resp. The external samples were used to test the predictive ability of the models, and the correlation coefficients (Rtest2) of the external predictions were 0.9955 and 0.9955, and the standard deviations (SDtest) were 0.0720 and 0.0716, resp. The mol. structure descriptors could successfully represent the structural characteristics of the compounds, and the built models had good fitting effects, strong stability and high prediction accuracy. The present study has a good reference value for the study of the structure-toxicity relationship of toxic compounds in the environment. This study involved multiple reactions and reactants, such as Methyl heptanoate (cas: 106-73-0Recommanded Product: Methyl heptanoate).

Methyl heptanoate (cas: 106-73-0) belongs to esters. Esters are widespread in nature and are widely used in industry. In nature, fats are in general triesters derived from glycerol and fatty acids. Esters are responsible for the aroma of many fruits. Esterification is the general name for a chemical reaction in which two reactants (typically an alcohol and an acid) form an ester as the reaction product. Esters are common in organic chemistry and biological materials.Recommanded Product: Methyl heptanoate

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

Volatile Compounds Determined by SPME-GC, Bioactive Compounds, In Vitro Antioxidant Capacity and Physicochemical Characteristics of Four Native Fruits from South America was written by da Silva, Aline Priscilla Gomes;Spricigo, Poliana Cristina;Purgatto, Eduardo;de Alencar, Severino Matias;Jacomino, Angelo Pedro. And the article was included in Plant Foods for Human Nutrition in 2019.Recommanded Product: 106-73-0 The following contents are mentioned in the article:

The aim of the present study was to identify volatile organic compounds (VOCs) by SPME-GC and quantify the bioactive compounds (ascorbic acid, total flavonoids and total phenolic content), antioxidant capacity (DPPH and ORAC) and physicochem. characteristics of ocorocillo, cambuca, murici da praia and murici do campo, four native South American fruits. A total of 41 volatile compounds were identified in ocorocillo, of which 17 were terpenes. Cambuca’s volatile profile contained aldehydes, aromatic hydrocarbons and alcs. Murici da praia and murici do campo contained high levels of fatty acid volatiles and esters, that contribute to their remarkable aroma. Ocorocillo contained high levels of ascorbic acid and total flavonoids, while presented lower ascorbic acid, flavonoid and phenolic levels. Murici da praia and murici do campo contained high amounts of phenolic compounds and high free-radical scavenging capacity (DPPH and ORAC). In addition, this fruit was sweeter and less acid compared to the other assessed fruits. The results suggest that these native fruits constitute a good source of volatile compounds and bioactive compounds, which may aid in their preservation interest and potential use in the food, cosmetic and pharmaceutical industries. This study involved multiple reactions and reactants, such as Methyl heptanoate (cas: 106-73-0Recommanded Product: 106-73-0).

Methyl heptanoate (cas: 106-73-0) belongs to esters. Esters perform as high-grade solvents for a broad array of plastics, plasticizers, resins, and lacquers, and are one of the largest classes of synthetic lubricants on the commercial market. Polyesters are important plastics, with monomers linked by ester moieties. Because of their lack of hydrogen-bond-donating ability, esters do not self-associate. Consequently, esters are more volatile than carboxylic acids of similar molecular weight.Recommanded Product: 106-73-0

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

Durability of rubberized asphalt binders containing waste cooking oil under thermal and ultraviolet aging was written by Lei, Lyu;Pei, Jianzhong;Hu, Dongliang;Fini, Elham H.. And the article was included in Construction and Building Materials in 2021.SDS of cas: 106-73-0 The following contents are mentioned in the article:

Thermal oxidation and UV exposure contribute to major changes in the physicochem. and rheol. properties of asphalt binder, leading to the deterioration of pavements. This paper investigates the merits of grafting bio-derived mols. onto particles of crumb rubber to create bio-modified rubberized asphalt binder with enhanced resistance to thermal aging and UV aging. The bio-modification of the crumb rubber was made via a hybrid process where mols. of waste cooking oil were grafted to rubber with the help of microwave radiation. The evolution of bio-modified rubberized asphalt during thermal aging and UV aging was then characterized and compared with those of conventional rubberized asphalt. Study results showed biomodification was effective to delay both thermal aging and UV aging. However, the effectiveness varied with the type of aging with the resistance to thermal aging being enhanced by 35%-84% and the resistance to UV aging being enhanced by 34-106%. Overall, the synergy between waste cooking oil, crumb rubber, and asphalt binder led to a significant improvement in the resistance against aging, thereby promoting sustainability in construction while making use of two waste streams including waste cooking oil and crumb rubber from scrap tire. This study involved multiple reactions and reactants, such as Methyl heptanoate (cas: 106-73-0SDS of cas: 106-73-0).

Methyl heptanoate (cas: 106-73-0) belongs to esters. Carboxylic acid esters of low molecular weight are colourless, volatile liquids with pleasant odours, slightly soluble in water. Cyclic esters are called lactones, regardless of whether they are derived from an organic or inorganic acid. One example of an organic lactone is γ-valerolactone.SDS of cas: 106-73-0

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

The One-pot Encapsulation of Palladium Complexes into Covalent Organic Frameworks Enables the Alkoxycarbonylation of Olefins was written by Yang, Xin;Du, Yi-Ran;Guan, Peng-Xin;Liu, Hong-Ying;Wang, Yao-Feng;Xu, Bao-Hua. And the article was included in ChemCatChem in 2022.Name: Methyl heptanoate The following contents are mentioned in the article:

In this study, palladium-based heterogeneous catalysts were successfully prepared by encapsulating the palladium diphosphine complexes into an imine-linked 2D-COF (TPB-DMTP-COF) through a one pot self-assembly approach. It not only prevents the oxidation of phosphine-based ligand during the stepwise impregnation but also suppresses the coordination of imine linkers at the COF host to the palladium guest, thus enabling highly efficient encapsulation of the active bidentate phosphine chelated palladium complex by the widely explored imine-linked COF. Besides, the dosage of diphosphine ligand (Xantphos-SO₃H, L) and the ratio of palladium to L in the preparation of [Pd]@COF hybrids can be readily adjusted under such one pot procedure to satisfy the requirement of crystallinity, porosity, active sites, and CO adsorption capacity for the catalytic performance in the methoxycarbonylation of olefins. The resultant [Pd]@COF-A-0.25-0.5 provides satisfied catalytic performance for both aliphatic and aromatic olefins with total esters up to 92.1% under optimized conditions. These findings provide the basis for a novel design concept to design heterogeneous catalysts with high efficiency for reaction processes comprising the alkoxycarbonylation of olefins. This study involved multiple reactions and reactants, such as Methyl heptanoate (cas: 106-73-0Name: Methyl heptanoate).

Methyl heptanoate (cas: 106-73-0) belongs to esters. Esters perform as high-grade solvents for a broad array of plastics, plasticizers, resins, and lacquers, and are one of the largest classes of synthetic lubricants on the commercial market. Liquid esters of low volatility serve as softening agents for resins and plastics. Esters also include many industrially important polymers. Polymethyl methacrylate is a glass substitute sold under the names Lucite and Plexiglas; polyethylene terephthalate is used as a film (Mylar) and as textile fibres sold as Terylene, Fortrel, and Dacron.Name: Methyl heptanoate

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

A chemometric approach to compare Portuguese native hops with worldwide commercial varieties was written by Martins, Zita E.;Machado, Julio C. Jr.;Cunha, Sara C.;Barata, Ana Maria;Ferreira, Isabel M. P. L. V. O.. And the article was included in Journal of Chemometrics in 2020.Name: Methyl heptanoate The following contents are mentioned in the article:

A diversity of native hops can be found in Portugal, but little is known concerning their volatile and sensory profiles. Nowadays, the exponential growth of the craft beer sector and the preference for more flavoured beers promote the research of unexplored wild hops that have the advantage of being well adapted to the Portuguese edaphoclimatic conditions. Therefore, the goal of this study was to characterize the volatile profile of 75 native Portuguese hops and compare with 34 com. varieties by means of headspace solid-phase microextraction gas chromatog./mass spectrometry (HS-SPME-GC/MS), in order to select those that present similarities with commercialized hops and confirm by check-all-that-apply (CATA) anal. if they present similar organoleptic characteristics. Due to the complexity of hop volatile profile and the great number of samples analyzed, robust chemometric treatment of chromatog. and sensorial data was required to make reliable conclusions. Twelve Portuguese hops present a volatile profile and sensory characteristics quite similar to some com. varieties, because 11 Portuguese hops were grouped with the European varieties Challenger, Hallertauer Magnum and Perle, both in volatile profile and sensory anal. and one clustered with American registered varieties. This study involved multiple reactions and reactants, such as Methyl heptanoate (cas: 106-73-0Name: Methyl heptanoate).

Methyl heptanoate (cas: 106-73-0) belongs to esters. Esters are also usually derived from carboxylic acids. It may also be obtained by reaction of acid anhydride or acid halides with alcohols or by the reaction of salts of carboxylic acids with alkyl halides. Esters are more polar than ethers but less polar than alcohols. They participate in hydrogen bonds as hydrogen-bond acceptors, but cannot act as hydrogen-bond donors, unlike their parent alcohols. This ability to participate in hydrogen bonding confers some water-solubility.Name: Methyl heptanoate

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

Metabolomic and Proteomic Profile of Dried Hop Inflorescences (Humulus lupulus L. cv. Chinook and cv. Cascade) by SPME-GC-MS and UPLC-MS-MS was written by Nezi, Paola;Cicaloni, Vittoria;Tinti, Laura;Salvini, Laura;Iannone, Matteo;Vitalini, Sara;Garzoli, Stefania. And the article was included in Separations in 2022.Formula: C8H16O2 The following contents are mentioned in the article:

Hop (Humulus lupulus L.) is grown mainly for the production of beer. The flowers of the female plant give it the bitter taste and pungent aroma. There are a large number of hop varieties differing in their α-acid content, essential oil levels and odor profiles. Aside from their use in brewing, more recently, hops have been used for the pharmacol. properties of its derivatives that are of great importance to the pharmaceutical industry. Hop is known to have a fairly complex chem. characterized by the presence of a variety of sesquiterpenoids, diterpenoids and triterpenoids, phytoestrogens and flavonoids. Addnl., considering the countless applications in the pharmacol. sector in recent years, a chem. characterization of the different cultivars is essential to better identify the source of specific secondary metabolites. For this purpose, the dried inflorescences of two hop cultivars, Chinook and Cascade, were investigated using Solid-Phase Microextraction-Gas Chromatog.-Mass Spectrometry and Liquid Chromatog.-Tandem Mass Spectrometry (SPME-GC-MS and LC-MS-MS) to describe their metabolomic and proteomic profile. Furthermore, thanks to an in-depth statistical survey, it was possible to carry out a comparative study highlighting interesting implications deriving from this investigative study. This study involved multiple reactions and reactants, such as Methyl heptanoate (cas: 106-73-0Formula: C8H16O2).

Methyl heptanoate (cas: 106-73-0) belongs to esters. Volatile esters with characteristic odours are used in synthetic flavours, perfumes, and cosmetics. Certain volatile esters are used as solvents for lacquers, paints, and varnishes. Many esters have the potential for conformational isomerism, but they tend to adopt an s-cis (or Z) conformation rather than the s-trans (or E) alternative, due to a combination of hyperconjugation and dipole minimization effects. The preference for the Z conformation is influenced by the nature of the substituents and solvent, if present. Lactones with small rings are restricted to the s-trans (i.e. E) conformation due to their cyclic structure.Formula: C8H16O2

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