Month: December 2022

Dupeux, Tristan published the artcileCOSMO-RS as an effective tool for predicting the physicochemical properties of fragrance raw materials, Safety of Benzyl acetate, the main research area is fragrance raw material physicochem property.

A predictive tool called COSMO-RS, Conductor-Like Screening Model for Real Solvents, based on quantum chem., dielec. continuum models, electrostatics surface interactions, and statistical thermodn., has been used to predict five key physicochem. properties of raw materials used in perfumery industries. The prediction of b.p. (BP), octanol-water partition coefficient (log P), vapor pressure (VP), water solubility (WS), and Henry′s law constant (HLC) of fragrance mols. has been validated with a reference data set of 166 organic compounds Knowing these properties for a fragrance mol. is essential and being able to predict them precisely can be particularly useful in the development of new mols. or in the replacement of controversial mols. regarding safety issues without compromising the overall hedonic accord. Finally, mapping the vapor pressure vs. the Henry′s law constant and the octanol-water partition coefficient consistently predicts the note class of the mols. useful for release comparison of captives.

Flavour and Fragrance Journal published new progress about Boiling point. 140-11-4 belongs to class esters-buliding-blocks, name is Benzyl acetate, and the molecular formula is C9H10O2, Safety of Benzyl acetate.

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

Zhan, Taotao published the artcileSpeed of Sound and Derived Properties of Ethyl Nonanoate, Formula: C11H22O2, the main research area is ethyl nonanoate sound velocity derived property.

Et nonanoate is a promising component of biodiesel with a satisfactory cetane number and reactivity. The speeds of sound in Et nonanoate were measured by the Brillouin light scattering (BLS) method within the temperatures from 295.24 to 593.15 K and at pressures up to 10 MPa. The relative expanded uncertainty (k = 2) of our BLS exptl. system is estimated to be less than 0.7%. The densities of Et nonanoate were measured using a vibrating tube densimeter at atm. pressure in the temperature range of 293.15-353.15 K, and the absolute average relative deviation between the exptl. densities and the literature data is 0.12%. For temperatures between 303.15 and 353.15 K and at pressures up to 10 MPa, these measurements were used to calculate densities, isobaric heat capacities, and indirect derivative properties including the isobaric thermal expansion, the isothermal compressibility, the isentropic compressibility, and the internal pressure. The comparison between the calculated isobaric heat capacities and the literature values shows a satisfactory agreement with an absolute average relative deviation of 0.18% and a maximum deviation of 0.38%. At the end, the dependences of internal pressure of Et nonanoate on temperature and pressure were found to be in accordance with those of Et caprylate and Et caprate.

Journal of Chemical & Engineering Data published new progress about Boiling point. 123-29-5 belongs to class esters-buliding-blocks, name is Ethyl nonanoate, and the molecular formula is C11H22O2, Formula: C11H22O2.

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

Saeed, Mohsin Hassan published the artcileEffects of rigid structures containing (meth)acrylate monomers and crosslinking agents with different chain length on the morphology and electro-optical properties of polymer-dispersed liquid crystal films, Application In Synthesis of 142-90-5, the main research area is acrylic polymer liquid crystal film morphol electrooptical property.

This contribution investigates the preparation of polymer-dispersed liquid crystal (PDLC) films based on meth(acrylate) monomers containing rigid structures. The current study specifically focuses on comparison of the monomers on the basis of meth(acrylate) side group, flexible/rigid structures and rigidity. We find that methacrylate monomers exhibit more preferable electro-optic properties than that of the acrylate monomers. Furthermore, through the systematic variation of rigidity, composition of the monomers and chain length of crosslinking agents, both the morphologies and electro-optic properties of these films are found to be adjustable. A composite film is demonstrated by employing moderately rigid monomer (tetrahydrofurfuryl methacrylate) with low driving voltage (21.0 V) and high contrast ratio (87.5). Therefore, the studies here provide a new approach to optimize the electro-optical properties of the PDLC films by introducing monomers with rigid structures.

Journal of Modern Optics published new progress about Birefringence. 142-90-5 belongs to class esters-buliding-blocks, name is Dodecyl 2-methylacrylate, and the molecular formula is C16H30O2, Application In Synthesis of 142-90-5.

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

Cadena-Aizaga, M. Isabel published the artcileAssessment of anthropogenic pollution by UV filters using macrophytes as bioindicators, Computed Properties of 71617-10-2, the main research area is macrophyte bioindicator UV filter anthropogenic pollution; Anthropogenic contamination; Macrophytes; Microwave-assisted extraction; Organic UV filters.

Marine environment pollution has increased in recent decades as a result of anthropogenic activities. Macrophytes can assimilate the compounds dissolved in the water and respond to changes in surround conditions, for that, they can be used as bioindicators of pollution in aquatic environments. Currently organic UV filters have shown ever-increasing in pollution levels in marine ecosystems. The anthropogenic pollution produced by eight organic UV filters in coastal macrophytes was studied. A microwave-assisted extraction (MAE), followed by ultrahigh-performance liquid chromatog. with tandem mass spectrometry (UHPLC-MS/MS) was applied to 76 macrophyte (seaweeds and seagrass) samples from three different beaches on the Gran Canaria Island (Spain), collected for 6 mo. All studied UV filters were found with different detection frequencies from 16% to 100% in macrophyte samples. Octocrylene (OC) was detected in all the analyzed samples throughout the sampling period. The highest concentration, 19,369 ng·g-1 dry weight (dw), was for this compound in the seagrass Cymodocea nodosa. The bioconcentration ratio was determined for several seaweed groups (red, brown, green). Different bioconcentration grades were obtained. Those above 1000 indicated significant accumulation, which increases the possibility of chronic effects on seaweed and at upper tropic levels.

Science of the Total Environment published new progress about Bioindicators. 71617-10-2 belongs to class esters-buliding-blocks, name is Isopentyl 3-(4-methoxyphenyl)acrylate, and the molecular formula is C15H20O3, Computed Properties of 71617-10-2.

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

Hamad, Younis K. published the artcileActivity of plant extracts/essential oils against three plant pathogenic fungi and mosquito larvae: GC/MS analysis of bioactive compounds, Synthetic Route of 140-11-4, the main research area is Fusarium Tectona Rhizoctonia Culex essential oil larvicidal antifungal.

Certain natural products extracted from different parts of medicinal and aromatic plants were examined for their antifungal activity against three plant pathogenic fungi, Fusarium oxysporum, Rhizoctonia solani, and Alternaria solani, and insecticidal activity against mosquito larvae (Culex pipiens). Acetone extract of Tectona grandis showed the highest antifungal activity against R. solani and A. solani with EC50 values of 118 and 294μg/mL, resp. The highest larvicidal activity was displayed by the essential oils of Ocimum basilicum and Eucalyptus gomphocephala with LC50 value of 22, and 30 mg/L, resp. By gas chromatog.- mass spectrometry (GC/MS) anal. 3-allylguaiacol (65.8%) and eugenol acetate (46.6%) were the main compounds in Syzygium aromaticum methanolic extract and essential oil, resp. The main compound in T. grandis acetone extract was cyclohexylpentyl oxalate (8.7%); its water extract contained (E)-4,4-dimethyl-2-pentene (51.1%); E. gomphocephala branch oil contained p-cymene (28.8%); Euphorbia paralias leaf extract contained 1βH-romneine (26.3%); the seed extract contained α-linolenic acid, TMS (15.2%); Punica granatum extract contained furfural (32.1%); and O. basilicum essential oil contained estragole (65.9%). Thus, extracts from the tested plants can be used as natural biofungicides to manage diseases caused by F. oxysporum, R. solani, and A. solani. Addnl., these extracts show potential la rvicide activities against mosquito larvae.

BioResources published new progress about Biofungicides. 140-11-4 belongs to class esters-buliding-blocks, name is Benzyl acetate, and the molecular formula is C9H10O2, Synthetic Route of 140-11-4.

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

Chen, Jianhua published the artcileBurkholderia cenocepacia ETR-B22 volatile organic compounds suppress postharvest grey mold infection and maintain aroma quality of tomato fruit, SDS of cas: 140-11-4, the main research area is Burkholderia cenocepacia volatile organic suppress postharvest gray mold infection.

Microbial volatile organic compounds (VOCs) are effective biofumigants for controlling postharvest fruit decay. We evaluated the postharvest biofumigation efficacy of the VOCs produced by Burkholderia cenocepacia ETR-B22 for alleviating tomato fruit gray mold and its impact on the fruit quality. The results demonstrated that the VOCs inhibited the hyphal growth and spore germination of pathogen Botrytis cinerea and caused hyphal cell death. Postharvest biofumigation with VOCs significantly decreased disease incidence, disease index, and weight loss of tomato fruit. The antifungal efficacy of the VOCs was affected by growth media substrates, inoculation volume, and concentration Among the analyzed VOC components, di-Me trisulfide was most effective in inhibiting B. cinerea. Biofumigation with VOCs produced by ETR-B22 delayed the deterioration of the nutrition quality of tomato fruit. Metabolomics anal. revealed that the aromatic metabolite profile of postharvest tomato fruit was well-maintained after fumigation with ETR-B22 VOCs. Therefore, B. cenocepacia ETR-B22 VOCs could be used as useful biofumigants for extending postharvest tomato fruit shelf life and controlling gray mold disease.

LWT–Food Science and Technology published new progress about Biofungicides. 140-11-4 belongs to class esters-buliding-blocks, name is Benzyl acetate, and the molecular formula is C9H10O2, SDS of cas: 140-11-4.

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

Sun, Yiqi published the artcileGrafting Lignin with Bioderived Polyacrylates for Low-Cost, Ductile, and Fully Biobased Poly(lactic acid) Composites, Formula: C16H30O2, the main research area is lignin bioderived polyacrylate graft toughening agent polylactic acid composite.

It has been always attractive to design low-cost, ductile, and fully biobased polylactic acid (PLA) composites based on industrial waste lignin for promoting its practical applications in the industry. Unfortunately, existing material strategies often lead to poor processability and low ductility because of weak interfaces between lignin and PLA. Herein, we report a fully biobased functionalized lignin (Lig-g-P(LMA-co-THFMA), or Mlignin) by chem. grafting two bioderived monomers, lauryl methacrylate (LMA), and tetrahydrofurfuryl methacrylate (THFMA) via free-radical polymerization Mlignin exhibits moderately lower melt viscosity and improved formability with PLA as compared with pristine lignin due to better interfacial combability. Because of improved interfacial adhesion, Mlignin is capable of uniformly dispersing within the PLA matrix in a submicron phase size, leading to a “”sea-island”” structure. As a result, the addition of 20 wt % Mlignin increases the ductility by 16 folds (from 12 to 204%) and the toughness by âˆ?1 folds from 4.4 to 54.6 MJ m-3 relative to the PLA matrix. Meanwhile, the PLA/20% Mlignin composite retains a tensile strength of 40.9 MPa. Such largely enhanced ductility and toughness of PLA is mainly attributed to the deformation of Mlignin that can dissipate the fracture energy during the tension process. This work not only offers a simple route to converting industrial waste lignin into value-added biobased fillers for polymers and but also provides a new approach for developing low-cost, ductile, and fully sustainable PLA to further its industrial applications. A new class of fully biobased lignin-derived toughening agents has been developed by graft copolymerization and demonstrated an excellent toughening effect on PLA.

ACS Sustainable Chemistry & Engineering published new progress about Biocomposites. 142-90-5 belongs to class esters-buliding-blocks, name is Dodecyl 2-methylacrylate, and the molecular formula is C16H30O2, Formula: C16H30O2.

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

Tian, Qirui published the artcileIn situ complex coacervation supported by self-coated polydopamine interlayer on uniform-sized essential oils droplet, Related Products of esters-buliding-blocks, the main research area is coacervation polydopamine coated essential oils droplet.

Essential oils (EOs) are common additives in daily products by virtue of their olfactory, physicochem., and biol. characteristics. However, EOs are physicochem. unstable and susceptible to degradation or loss, leading to limited shelf life and inadequate efficacy. Herein we propose a new bi-layered encapsulation structure in combination with complex coacervation and self-coating of polydopamine (PDA) on membrane emulsified mono-dispersion of EOs droplets. A mono-dispersed EOs emulsion stabilized by nonionic surfactants was produced by membrane emulsification, wherein the EOs droplets were applied as soft templates to deposit a superficial PDA layer. Under alk. conditions, gelatin (GE) was bound to the PDA layer and further applied as in situ coacervation sites for gum Arabic (GA). Structural identification and morphol. observation proved the successful preparation of bi-layered EOs capsules. Compared with traditional complex coacervation strategies, current novel bi-layered capsules showed significantly improved structural stability, thermal stability, providing better protection of EOs with sustained release properties. Moreover, the encapsulation efficiency and loading content were both proved higher for the bi-layered system. The first report on PDA-coating onto surfactants-absorbed macroemulsion droplets also provides an in-depth insight into applying PDA as versatile intermediate functional biomaterials.

Journal of Colloid and Interface Science published new progress about Bilayer films. 140-11-4 belongs to class esters-buliding-blocks, name is Benzyl acetate, and the molecular formula is C9H10O2, Related Products of esters-buliding-blocks.

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

Salama, El-Sayed published the artcileEnhanced anaerobic co-digestion of fat, oil, and grease by calcium addition: Boost of biomethane production and microbial community shift, Safety of Methyl octanoate, the main research area is grease anaerobic digestion calcium biomethane Firmicutes Sedimentibacter Methanosaeta; Anaerobic co-digestion; Biomethane; Calcium pretreatment; Fat, oil, and grease; Microbial community.

This work focused on the application of calcium (0.1-1% w/v) to overcome the inhibition caused by the high loadings (2% volume/volume) of fat, oil, and grease (FOG) in the context of biomethane production, organic removal, and microbial community shift. Addition of 0.5% calcium showed maximum biomethane production (6-fold increase); biomethane production decreased following the addition of calcium (>0.5%). The highest organic removal rates were 83 and 89% upon the addition of 0.3 and 0.5% calcium, resp. Addition of calcium facilitated the growth of bacteria of phylum Firmicutes from the Clostridium, Syntrophomonas, and Sedimentibacter genera. The population of members from the genus Methanosaeta increased after the addition of 0.5% calcium, which is one of the factors responsible for high biomethane production This study demonstrated that addition of calcium is an attractive strategy to avoid the inhibition of the growth of anaerobic microflora due to the presence of high FOG concentrations

Bioresource Technology published new progress about Bacteroidetes. 111-11-5 belongs to class esters-buliding-blocks, name is Methyl octanoate, and the molecular formula is C9H18O2, Safety of Methyl octanoate.

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

Salama, El-Sayed published the artcileEnhanced anaerobic co-digestion of fat, oil, and grease by calcium addition: Boost of biomethane production and microbial community shift, HPLC of Formula: 929-77-1, the main research area is grease anaerobic digestion calcium biomethane Firmicutes Sedimentibacter Methanosaeta; Anaerobic co-digestion; Biomethane; Calcium pretreatment; Fat, oil, and grease; Microbial community.

This work focused on the application of calcium (0.1-1% w/v) to overcome the inhibition caused by the high loadings (2% volume/volume) of fat, oil, and grease (FOG) in the context of biomethane production, organic removal, and microbial community shift. Addition of 0.5% calcium showed maximum biomethane production (6-fold increase); biomethane production decreased following the addition of calcium (>0.5%). The highest organic removal rates were 83 and 89% upon the addition of 0.3 and 0.5% calcium, resp. Addition of calcium facilitated the growth of bacteria of phylum Firmicutes from the Clostridium, Syntrophomonas, and Sedimentibacter genera. The population of members from the genus Methanosaeta increased after the addition of 0.5% calcium, which is one of the factors responsible for high biomethane production This study demonstrated that addition of calcium is an attractive strategy to avoid the inhibition of the growth of anaerobic microflora due to the presence of high FOG concentrations

Bioresource Technology published new progress about Bacteroidetes. 929-77-1 belongs to class esters-buliding-blocks, name is Methyl docosanoate, and the molecular formula is C23H46O2, HPLC of Formula: 929-77-1.

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