Category: esters-buliding-blocks

Ma, Yan published the artcileLiquefaction of bamboo biomass and production of three fractions containing aromatic compounds, Synthetic Route of 539-88-8, the main research area is bamboo biomass liquefaction aromatic compound.

Depolymerization of lignin to produce value-added aromatic monomers has attracted increasing attention since these monomers can be used as phenol replacement in production of phenolic resins. Here a one-pot depolymerization of bamboo lignin was investigated to obtain aromatic platforms with low mol. weight using acidic catalyst and ethanol. Three fractions (1#, 2#, and 3#) containing different mol. weight distributions of aromatic compounds could be efficiently extracted using water-organic solvent system via a stepwise fractionation process by gradual removal of solvent. The fractions distribution was found to be primarily dependent on the reaction temperature and time. When the temperature was increased from 160°C to 200°C, the yield of fractions containing aromatic products increased significantly from 19.1 wt% to 27 wt%, the same change trend was found by changing the time, and the yield of aromatic products increased from 22.4% to 26.7% with an increase of time from 10 min to 30 min. The bioproducts were characterized by using gas chromatog./mass spectrometry (GC-MS), gel permeation chromatog. (GPC) and two-dimensional heteronuclear single-quantum coherence (2D HSQC NMR). As evidenced by GC-MS spectra, the three fractions were mainly comprised of phenolic derivatives, and the relative contents of phenolic compounds took up about 80% of the total area of each fraction. With the similar physiochem. properties of the fractions, aromatic platforms could provide a new paradigm of bamboo lignin utilization for renewable energy and value-added biochems.

Journal of Bioresources and Bioproducts published new progress about Aromatic compounds Role: TEM (Technical or Engineered Material Use), USES (Uses). 539-88-8 belongs to class esters-buliding-blocks, name is Ethyl 4-oxopentanoate, and the molecular formula is C7H12O3, Synthetic Route of 539-88-8.

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

Aghilinategh, Maryam published the artcileThe modified supercritical media for one-pot biodiesel production from Chlorella vulgaris using photochemically-synthetized SrTiO3 nanocatalyst, Formula: C23H46O2, the main research area is strontium titanate Chlorella vulgaris photochem biodiesel production.

In this research, a one-pot production of biodiesel, hydrocarbons, oxygenates, and aromatics form Chlorella vulgaris was performed in supercritical methanol without catalyst and in the presence of TiO2 and SrTiO3 nanocatalysts. The reaction in the presence of SrTiO3 showed the highest production yield of fatty acid Me esters (FAMEs). The co-solvents water, chloroform, di-Et ether, and n-hexane were used for modifying the supercritical medium to affect the product yields in SrTiO3 -catalyzed process. The SrTiO3 nanocatalyst was photochem. prepared and the leaching of catalysts into the products was evaluated. Results showed that for all products except oxygenates, the addition of di-Et ether and chloroform to methanol had a slightly pos. effect on the production yields. For all products, n-hexane co-solvent showed the best performance with production yields of 16.65, 2.42, 2.12, and 0.57 mg.g-1biomass for FAMEs, oxygenates, hydrocarbons, and aromatics, resp. Furthermore, the water showed no significant effect on production yields except in the case of oxygenates. The results may be due to the high ability of n-hexane for dissolving the biomass in the reaction condition. Also, the ICP-OES detected no trace amounts of catalyst in the final product and it confirms that the photochem. method for catalyst preparation can prevent the catalyst leaching.

Renewable Energy published new progress about Aromatic compounds Role: TEM (Technical or Engineered Material Use), USES (Uses). 929-77-1 belongs to class esters-buliding-blocks, name is Methyl docosanoate, and the molecular formula is C23H46O2, Formula: C23H46O2.

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

Voelkl, Matthias published the artcilePristine and artificially-aged polystyrene microplastic particles differ in regard to cellular response, Application In Synthesis of 2044-85-1, the main research area is microplastic particle cellular response cytotoxicity; Biological effects; Cytotoxicity; Fragments; Genotoxicity; Inflammation; Microplastic; RNA sequencing; Reactive oxygen species; Transcriptomic; Weathered particles.

Microplastic particles (MP), arising from the gradual decomposition of plastics in the environment, have been identified as a global problem. Most investigations of MP cytotoxicity use pristine spherical particles available from com. sources when evaluating their impact on mammalian cells, while only limited data is available for the more relevant “”weathered microplastic””. In this study, we exposed murine macrophages to polystyrene MP either after up to 130 days of accelerated ageing or in pristine condition. Weathered and pristine MP were physicochem. characterized, and their cytotoxicity was investigated using biol. assays, transcriptome anal., and metabolic pathways prediction. Whereas the response to pristine MP is mainly dominated by a TNF-α release, sharp-edged weathered MP induce broader adverse cellular reactions. This study stresses the importance of including more realistic test particles (e.g., weathered particles) in combination with a broad range of biol. assays when evaluating the potential risk of microplastic exposure.

Journal of Hazardous Materials published new progress about BMF proteins Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 2044-85-1 belongs to class esters-buliding-blocks, name is 2′,7′-Dichloro-3-oxo-3H-spiro[isobenzofuran-1,9′-xanthene]-3′,6′-diyl diacetate, and the molecular formula is C24H14Cl2O7, Application In Synthesis of 2044-85-1.

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

Ashmawy, Ashraf M. published the artcileNovel allyl-ester-based polymers as flow improvers for waxy crude oil, Synthetic Route of 583-04-0, the main research area is allyl ester polymer waxy crude oil flow improver.

The deposition of paraffin wax from crude oil at low temperatures due to wax deposition, high pour point, high viscosity, and weak flow capability is among the critical and persisting challenges faced by the petroleum industry. In this study, a new para-decyloxy allyl benzoate (I10) was prepared, polymerized into HI10, and copolymerized with dioctadecyl maleate into MHI10 via the freeradical polymerization method employing azobisisobutyronitrile and toluene as the initiator and solvent, resp. The prepared monomer was characterized by spectroscopic analyses (Fourier-transform IR (FT-IR)) and proton NMR. Further, the polymers were characterized by FT-IR, and their average mol. weights were determined by gel permeation chromatog. The prepared compounds were taken in different concentrations and then tested as flow improvers of Qarun waxy crude oil using pour point depression and rheol. parameters. The results of this test indicated that MHI10 exerted the highest effect on pour point reduction and the rheol. parameters (yield value and apparent viscosity). Moreover, an increase in the efficiency of the additives was observed after increasing their concentration from 1000 to 5000 ppm.

Chemical Industry & Chemical Engineering Quarterly published new progress about Copolymers Role: FMU (Formation, Unclassified), FORM (Formation, Nonpreparative). 583-04-0 belongs to class esters-buliding-blocks, name is Allyl benzoate, and the molecular formula is C10H10O2, Synthetic Route of 583-04-0.

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

Knothe, Gerhard published the artcileFatty acids, triterpenes and cycloalkanes in ficus seed oils, Application In Synthesis of 929-77-1, the main research area is Ficus seed oil fatty acid triterpene cycloalkane; Cycloalkanes; Fatty acid composition; Ficus nota; Ficus septica; Ficus ulmifolia; Gas chromatography; Mass spectrometry; Moraceae; Triterpenes.

The compositions of the seed oils obtained by hexane extraction of three members of the Ficus genus of the Moraceae plant family was determined, namely Ficus nota, Ficus septica, Ficus ulmifolia. Linolenic acid is the most prominent fatty acid in the seed oils followed by linoleic acid, with these two fatty acid comprising about 75% of the fatty acids in the oils. The high level of polyunsaturated fatty acids coincides with high levels of these acids predominating among the fatty acids observed in various plant parts of other Ficus species. Besides the fatty acids, a variety of phytochems. also found in other plant parts of Ficus species were observed in the seed oils, including squalene, pentacyclic triterpenes such as α-amyrin, β-amyrin and lupeol, as well as sterols such as cholesterol and γ-sitosterol, the former at unusually elevated levels. The levels of these phytochems. vary from species to species and location of harvest, with F. ulmifolia showing by far the highest level of these materials and with α-amyrin, β-amyrin and lupeol being the most common, their amounts exceeding those of fatty acids for samples from one specific location. Surprisingly, low levels of macrocyclic alkanes in the range of C24-C30 were identified.

Plant Physiology and Biochemistry (Issy-les-Moulineaux, France) published new progress about Cycloalkanes Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 929-77-1 belongs to class esters-buliding-blocks, name is Methyl docosanoate, and the molecular formula is C23H46O2, Application In Synthesis of 929-77-1.

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

Laurent, Jitka published the artcileThe Potential of Kluyveromyces marxianus to Produce Low-FODMAP Straight-Dough and Sourdough Bread: a Pilot-Scale Study, Product Details of C11H22O2, the main research area is Kluyveromyces Saccharomyces sourdough bread glucose microbial growth.

Diets low in fermentable oligo-, di-, and monosaccharides and polyols (FODMAPs) can help reduce symptoms in 50 to 80% of patients suffering from irritable bowel syndrome. Patients are, therefore, often advised to avoid products contributing to FODMAP intake, such as cereal grain products. However, these products are nutritious staple foods and avoiding their consumption may result in nutritional deficiencies. The development of low-FODMAP, high-fiber cereal grain products is therefore desirable. This pilot-scale study shows that Kluyveromyces marxianus CBS6014 (K. marxianus) results in more fructan hydrolysis and a significantly lower final fructan level in white and whole-grain toast bread as well as in rye sourdough bread compared to a com. Saccharomyces cerevisiae baking strain. Moreover, combined fructan and fructose levels in white and whole-grain bread prepared with K. marxianus remained well below the threshold concentration for low-FODMAP products. In addition to reducing fructan levels, K. marxianus in rye sourdough bread also pos. impacted bread height. Whereas further follow-up studies are needed to assess the potential of K. marxianus for bread production fully, our study suggests that this yeast species may open exciting novel routes for the production of low-FODMAP, high-fiber products.

Food and Bioprocess Technology published new progress about Disaccharides Role: FFD (Food or Feed Use), BIOL (Biological Study), USES (Uses). 123-29-5 belongs to class esters-buliding-blocks, name is Ethyl nonanoate, and the molecular formula is C11H22O2, Product Details of C11H22O2.

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

Lee, Johnny W. published the artcileRedox-Neutral TEMPO Catalysis: Direct Radical (Hetero)Aryl C-H Di- and Trifluoromethoxylation, Recommanded Product: Benzyl acetate, the main research area is TEMPO catalyst heteroaryl trifluoromethoxylation; arenes; fluorination; radicals; reaction mechanisms; synthetic methods.

Applications of TEMPO· catalysis for the development of redox-neutral transformations are rare. Reported here is the first TEMPO·-catalyzed, redox-neutral C-H di- and trifluoromethoxylation of (hetero)arenes. The reaction exhibits a broad substrate scope, has high functional-group tolerance, and can be employed for the late-stage functionalization of complex druglike mols. Kinetic measurements, isolation and resubjection of catalytic intermediates, UV/visible studies, and DFT calculations support the proposed oxidative TEMPO·/TEMPO+ redox catalytic cycle. Mechanistic studies also suggest that Li2CO3 plays an important role in preventing catalyst deactivation. These findings will provide new insights into the design and development of novel reactions through redox-neutral TEMPO· catalysis.

Angewandte Chemie, International Edition published new progress about Heterocyclic aromatic compounds Role: RCT (Reactant), RACT (Reactant or Reagent). 140-11-4 belongs to class esters-buliding-blocks, name is Benzyl acetate, and the molecular formula is C9H10O2, Recommanded Product: Benzyl acetate.

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

Nguyen, Dinh Duc published the artcileTechnical and Economic Analysis of Conventional and Supercritical Transesterification for Biofuel Production, SDS of cas: 111-11-5, the main research area is potassium hydroxide catalyst castor oil biofuel transesterification.

The transesterification process with potassium hydroxide (KOH) catalyst and the methanol supercritical process were evaluated by Aspen HYSYS software. Castor oil and methanol were used as feed and alc. In order to accomplish verification, the simulation results were compared to a laboratory research. For economic anal., these results were transferred to Aspen Economic Analyzer software. Piping and process equipment cost were calculated for the two processes. Addnl., direct and indirect costs of these processes were estimated

Chemical Engineering & Technology published new progress about Aldehydes Role: FMU (Formation, Unclassified), FORM (Formation, Nonpreparative). 111-11-5 belongs to class esters-buliding-blocks, name is Methyl octanoate, and the molecular formula is C9H18O2, SDS of cas: 111-11-5.

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

Riesenberg, Stephan published the artcileTargeting repair pathways with small molecules increases precise genome editing in pluripotent stem cells, Formula: C8H9NO4, the main research area is genome editing targeted nucleotide substitution induced pluripotent stem cell.

A now frequently used method to edit mammalian genomes uses the nucleases CRISPR/Cas9 and CRISPR/Cpf1 or the nickase CRISPR/Cas9n to introduce double-strand breaks which are then repaired by homol.-directed repair using DNA donor mols. carrying desired mutations. Using a mixture of small mols., the “”CRISPY”” mix, we achieve a 2.8- to 7.2-fold increase in precise genome editing with Cas9n, resulting in the introduction of the intended nucleotide substitutions in almost 50% of chromosomes or of gene encoding a blue fluorescent protein in 27% of cells, to our knowledge the highest editing efficiency in human induced pluripotent stem cells described to date. Furthermore, the CRISPY mix improves precise genome editing with Cpf1 2.3- to 4.0-fold, allowing almost 20% of chromosomes to be edited. The components of the CRISPY mix do not always increase the editing efficiency in the immortalized or primary cell lines tested, suggesting that employed repair pathways are cell-type specific.

Nature Communications published new progress about CD34 antigens Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 72835-26-8 belongs to class esters-buliding-blocks, name is (2,5-Dioxo-2,5-dihydro-1H-pyrrol-1-yl)methyl propionate, and the molecular formula is C8H9NO4, Formula: C8H9NO4.

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

Pott, Delphine M. published the artcileMetabolic reconfiguration of strawberry physiology in response to postharvest practices, Category: esters-buliding-blocks, the main research area is strawberry metabolic reconfiguration postharvest; Metabolites; Postharvest; Quality; Strawberry.

The strawberry fruit is perishable due to its high water content and soft texture, yet exhibits pleasant organoleptic and nutritional profile. Here we conducted a metabolomics-driven anal. followed by linear modeling to dissect the mol. processes in strawberry postharvest. Fruits from five cultivars were harvested and refrigerated during a ten-day period under three different atmospheres: ambient, CO2-enriched and O3-enriched. These analyses revealed that metabolites involved in, (i) organoleptic and nutritional properties; (ii) stress tolerance displayed duration and postharvest treatment-dependent levels. Ozone-enriched atm. appears to counteract postharvest neg. effects, with fruits exhibiting lower levels of fermentative metabolites when compared to fruits kept in an ambient atm. Furthermore, metabolic reconfiguration towards the synthesis of protective metabolites of those fruits can possibly confer enhanced tolerance to postharvest abiotic stresses. Finally, results from the linear modeling identified metabolites which could be used as biomarkers to assess strawberry quality during its postharvest shelf life.

Food Chemistry published new progress about Ellagitannins Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 110-42-9 belongs to class esters-buliding-blocks, name is Methyl decanoate, and the molecular formula is C11H22O2, Category: esters-buliding-blocks.

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