Category: esters-buliding-blocks

Tian, Jing-Pu published the artcileTranscriptomic and proteomic approaches to explore the differences in monoterpene and benzenoid biosynthesis between scented and unscented genotypes of wintersweet, Category: esters-buliding-blocks, the main research area is Chimonanthus monoterpene benzenoid biosynthesis genotype transcriptomics proteomics.

Wintersweet (Chimonanthus praecox L.) is an important ornamental plant in China with a pleasant floral scent. To explore the potential mechanisms underlying differences in the fragrances among genotypes of this plant, we analyzed floral volatile organic compounds (VOCs) from two different genotypes: SW001, which has little to no fragrance, and the scented genotype H29. The major VOCs in H29 were linalool, trans-β-ocimene, benzyl acetate, Me salicylate, benzyl alc. (BAlc) and Me benzoate. The most important aroma-active compound in H29, linalool, was emitted at a low concentration in SW001, which had markedly higher levels of trans-β-ocimene than H29. Next, to investigate scent biosynthesis, we analyzed the transcriptome and proteome of fully open flowers of the two genotypes. A total of 14 443 differentially expressed unigenes and 196 differentially expressed proteins were identified. Further analyses indicated that 56 differentially expressed genes involved in the terpenoid and benzenoid biosynthesis pathways might play critical roles in regulating floral fragrance difference. Disequilibrium expression of four terpene synthase genes resulted in diverse emission of linalool and trans-β-ocimene in both genotypes. In addition, the expressions of two CpMYC2 transcription factors were both upregulated in H29, implying that they may regulate linalool production Notably, 16 of 20 genes in the benzenoid biosynthesis pathway were downregulated, corresponding to the relatively low level of benzenoid production in SW001. The lack of benzyl acetate might indicate that SW001 may lack substrate BAlc or functional acetyl-CoA:benzylalc. acetyltransferase.

Physiologia Plantarum published new progress about Chimonanthus praecox. 140-11-4 belongs to class esters-buliding-blocks, name is Benzyl acetate, and the molecular formula is C9H10O2, Category: esters-buliding-blocks.

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

Zhang, Tengxun published the artcileA comparative analysis of floral scent compounds in intraspecific cultivars of Prunus mume with different corolla colours, Product Details of C9H10O2, the main research area is Prunus floral volatile compound; HS-SPME-GC-MS; Prunus mume; floral scent; intraspecific cultivars; phenylpropanoids/benzenoids; volatile compounds.

Prunus mume is the only fragrant flowering species of Prunus. According to the previous studies, benzyl acetate and eugenol dominate its floral scent. However, the diversity of its floral scents remains to be elucidated. In this work, the floral volatiles emitted from eight intraspecific cultivars of P. mume with white, pink and red flowers, were collected and analyzed using headspace solid-phase microextraction combined with gas chromatograms-mass spectrometry (HS-SPME-GC-MS). In total, 31 volatile compounds were identified, in which phenylpropanoids/benzenoids accounted for over 95% of the total emission amounts Surprisingly, except for benzyl acetate and eugenol, several novel components, such as benzyl alc., cinnamyl acohol, cinnamy acetate, and benzyl benzoate were found in some cultivars. The composition of floral volatiles in cultivars with white flowers was similar, in which benzyl acetate was dominant, while within pink flowers, there were differences of floral volatile compositions Principal component anal. (PCA) showed that the emissions of benzyl alc., cinnamyl alc., benzyl acetate, eugenol, cinnamyl acetate, and benzyl benzoate could make these intraspecific cultivars distinguishable from each other. Further, hierarchical cluster anal. indicated that cultivars with similar a category and amount of floral compounds were grouped together. Our findings lay a theor. basis for fragrant plant breeding in P. mume.

Molecules published new progress about Fatty acids Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 140-11-4 belongs to class esters-buliding-blocks, name is Benzyl acetate, and the molecular formula is C9H10O2, Product Details of C9H10O2.

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

Patias, Georgios published the artcileControlled synthesis of methacrylate and acrylate diblock copolymers via end-capping using CCTP and FRP, Related Products of esters-buliding-blocks, the main research area is methacrylate acrylate diblock copolymer catalytic chain transfer polymerization.

Scalable methods of producing functional materials is of importance. Herein, we report the use of free radical copolymerization of ω-unsaturated methacrylic macromonomers, as derived from catalytic chain transfer polymerization (CCTP), with acrylic monomers in solution leading to block copolymers by varying the nature of the macromonomer. We demonstrate the effect that varying the mol. weight and ester side chain length of macromonomer from CCTP, has on the polymerization leading to either graft or diblock copolymers. DOSY NMR, MALDI-ToF/ToF MS has allowed for the exploration of the extent to which varying the concentration of macromonomer has on the products formed. Importantly, during the successful synthesis of acrylic and methacrylic diblock copolymers with broad dispersities of each block, full consumption of the macromonomers was observed

Polymer Chemistry published new progress about Polymers, graft Role: PRP (Properties), SPN (Synthetic Preparation), PREP (Preparation). 142-90-5 belongs to class esters-buliding-blocks, name is Dodecyl 2-methylacrylate, and the molecular formula is C16H30O2, Related Products of esters-buliding-blocks.

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

Rodriguez-Solana, Raquel published the artcileInfluence of elaboration process on chemical, biological, and sensory characteristics of European pennyroyal liqueurs, Category: esters-buliding-blocks, the main research area is pennyroyal liqueur chem biol sensory property; antioxidant capacity; enzyme inhibition; napping; pennyroyal liqueur processing; pulegone; total phenolic content.

Mentha pulegium is an aromatic and medicinal plant used in different Mediterranean herb-based liqueurs, whose phytochem. composition depends on the elaboration technique used. The aim of this work was to investigate differences in the sensory, chem., and biol. characteristics of pennyroyal liqueurs elaborated by hydro-alc. (HI) and aqueous (AI) infusions, percolation (P), maceration (M), and distillation (D) techniques, and by the mixture of spirit with pennyroyal essential oil (EO). The volatile composition determined by gas chromatog.-mass spectrometry (GC-MS) and gas chromatog. coupled to flame ionization detection (GC-FID), the total phenolic (TPC) and flavonoid (TFC) contents, the antioxidant (AC), and enzyme (α-glucosidase, tyrosinase, and acetylcholinesterase) inhibitory capacities, and the sensory anal. by napping, were evaluated in the liqueurs obtained. Monoterpenes and sesquiterpenes were the main volatiles present in liqueurs. The M, P, HI, and AI liqueurs showed the highest TPC, TFC, and AC values; and pulegone, the main hepatotoxic chemotype, was found in concentrations that gave rise to concern. The D and EO liqueurs stand out for their acceptable pulegone content and greater tyrosinase inhibition. Similar liqueur classifications were achieved by sensory analyses, and physico-chem. and biol. analyses using multiple factor and principal component analyses, resp. These results are an important contribution to the identification of the most appropriate elaboration conditions for herbal liqueurs with the healthiest chem. composition and functional properties.

Journal of the Science of Food and Agriculture published new progress about Antioxidants. 123-29-5 belongs to class esters-buliding-blocks, name is Ethyl nonanoate, and the molecular formula is C11H22O2, Category: esters-buliding-blocks.

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

Zhao, Yuechao published the artcileEffect of chemical component characteristics of waste cooking oil on physicochemical properties of aging asphalt, Category: esters-buliding-blocks, the main research area is waste cooking oil aging asphalt pavement physicochem property.

The combined utilization of waste cooking oil (WCO) and reclaimed asphalt pavement (RAP) is attractive for economic, environmental, and energy benefits. However, the quality stability of WCO is poor due to its wide sources, which limits the further development of WCO recycled RAP. In this study, the classification method of WCO was proposed according to the mol. weight difference of its chem. components, and WCO was classified into three categories including light components (LC), intermediate components (IC), and heavy components (HC). Meanwhile, the characteristics of these three WCO components and their effects on the physicochem. properties of aging asphalt were investigated comprehensively. The exptl. results show that the softening ability of different components of WCO on aging asphalt is mainly determined by their mol. weight and thermal stability. Furthermore, LC rich in Me palmitate is easy solidification and volume expansion at the low temperature, which is not conducive to the repair of low-temperature ductility of aged asphalt. The chem. property analyses of recycled asphalt indicate that there is no chem. reaction between the components of WCO and the aging asphalt. The phys. dilution ability of WCO components on carbonyl index, sulfoxide index, and high mol. weight substances of aging asphalt is pos. correlated with their mol. weight In addition, HC contains chem. substances similar in composition to asphalt, which has the most obvious effect on the colloidal structure of aging asphalt. Overall, the classification method for WCO and related findings found in this study provides a reference for ensuring the quality stability of WCO and its industrial application in the recycling of aged asphalt.

Construction and Building Materials published new progress about Asphaltenes Role: PEP (Physical, Engineering or Chemical Process), PRP (Properties), PROC (Process). 929-77-1 belongs to class esters-buliding-blocks, name is Methyl docosanoate, and the molecular formula is C23H46O2, Category: esters-buliding-blocks.

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

Wang, Delong published the artcileGuaiacol as a natural melanin biosynthesis inhibitor to control northern corn leaf blight, Recommanded Product: Benzyl acetate, the main research area is guaiacol natural melanin essential oil corn leaf blight; DHN melanin biosynthesis inhibitor; guaiacol; northern corn leaf blight; plant essential oil compounds.

BACKGROUND : The natural 1,8-dihydroxynaphthalene (DHN) melanin biosynthesis inhibitors (MBIs) are one of the promising approaches to the integrated management of plant diseases but have received scarce attention until now. Herein, to explore the natural DHN MBIs used in the control of northern corn leaf blight (NCLB), a library of 53 essential oil compounds was used to screen the MBIs against Exserohilum turcicum, the causal pathogen of NCLB, using tricyclazole as a reference compound RESULTS : The results of morphol. change in the colony, thermogravimetric anal., UV-visible spectroscopy, and transmission electron microscopy confirmed that guaiacol could effectively inhibit the melanin production at 50 μg/mL under in vitro conditions. The in vitro bioassay results indicated that this inhibition effect was concentration-dependent and the min. inhibition concentration of guaiacol was 50 μg/mL. The in vivo exptl. results demonstrated that guaiacol significantly inhibited appressorium formation and penetration on corn leaf sheaths at the concentration of 500 μg/mL. The pot experiment results revealed that there were no differences between guaiacol (500 μg/mL) and tricyclazole (100 μg/mL) in control efficacy. The enzymic assay suggested that guaiacol might exert the activity through inhibiting DHN polymerization to form melanins, which was distinct from tricyclazole. CONCLUSIONS : Taken together, this study screened out guaiacol as a natural MBI from 53 essential oil compounds and verified its effectiveness in the control of NCLB at 500 μg/mL. Above all, this research opened an avenue for exploring natural DHN MBIs in the integrated management of plant diseases. 2022 Society of Chem. Industry.

Pest Management Science published new progress about Color. 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

Cecchi, Lorenzo published the artcileExploitation of virgin olive oil by-products (Olea europaea L .): phenolic and volatile compounds transformations phenomena in fresh two-phase olive pomace (′alperujo′) under different storage conditions, Formula: C11H22O2, the main research area is olive oil Olea europaea phenolic volatile compound storage condition; HS-SPME-GC-MS; nutraceuticals; olive mill by-products; olive pomace storage; polyphenols; secoiridoids.

Much effort has recently been spent for re-using virgin olive oil byproducts as nutraceutical ingredients for human diet thanks to their richness in bioactive phenols, but their management is not easy for producers. We aimed to provide useful information for a better management of fresh olive pomace before drying, by studying the phenolic and volatile compounds transformations phenomena of fresh olive pomace stored under different conditions planned to simulate controlled and uncontrolled temperature conditions in olive oil mills. The evolution of the phenolic and volatile compounds was studied by high-performance liquid chromatog.-diode array detector mass spectrometry (HPLC-DAD-MS) and headspace solid-phase microextraction gas chromatog.-mass spectrometry (HS-SPME-GC-MS). The phenolic profile varied rapidly during storage: the verbascoside content decreased about 70% after 17 days even at 4 °C, while the content of simple phenols such as hydroxytyrosol and caffeic acid increased over time. The low temperature was able to slow down these phenomena. A total of 94 volatile organic compounds (VOCs) were detected in the fresh olive pomace, with a prevalence of lipoxygenase (LOX) VOCs (78%), mainly aldehydes (19 490.9μg kg-1) despite the higher number of alcs. A decrease in LOX volatiles and a quick development of the ones linked to off-flavors (carboxylic acids, alcs., acetates) were observed, in particular after 4 days of storage at room temperature Only storage at 4 °C allowed these phenomena to be slowed down. To preserve the natural phenolic phytocomplex of fresh olive pomace before drying and to avoid off-flavors development, storage in open containers must be avoided and a short storage in cold rooms (7-10 days) is to be preferred. 2021 The Authors. Journal of The Science of Food and Agriculture published by John Wiley & Sons Ltd on behalf of Society of Chem. Industry.

Journal of the Science of Food and Agriculture published new progress about Alcohols Role: BSU (Biological Study, Unclassified), PRP (Properties), BIOL (Biological Study). 110-42-9 belongs to class esters-buliding-blocks, name is Methyl decanoate, and the molecular formula is C11H22O2, Formula: C11H22O2.

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

Cecchi, Lorenzo published the artcileExploitation of virgin olive oil by-products (Olea europaea L .): phenolic and volatile compounds transformations phenomena in fresh two-phase olive pomace (′alperujo′) under different storage conditions, Category: esters-buliding-blocks, the main research area is olive oil Olea europaea phenolic volatile compound storage condition; HS-SPME-GC-MS; nutraceuticals; olive mill by-products; olive pomace storage; polyphenols; secoiridoids.

Much effort has recently been spent for re-using virgin olive oil byproducts as nutraceutical ingredients for human diet thanks to their richness in bioactive phenols, but their management is not easy for producers. We aimed to provide useful information for a better management of fresh olive pomace before drying, by studying the phenolic and volatile compounds transformations phenomena of fresh olive pomace stored under different conditions planned to simulate controlled and uncontrolled temperature conditions in olive oil mills. The evolution of the phenolic and volatile compounds was studied by high-performance liquid chromatog.-diode array detector mass spectrometry (HPLC-DAD-MS) and headspace solid-phase microextraction gas chromatog.-mass spectrometry (HS-SPME-GC-MS). The phenolic profile varied rapidly during storage: the verbascoside content decreased about 70% after 17 days even at 4 °C, while the content of simple phenols such as hydroxytyrosol and caffeic acid increased over time. The low temperature was able to slow down these phenomena. A total of 94 volatile organic compounds (VOCs) were detected in the fresh olive pomace, with a prevalence of lipoxygenase (LOX) VOCs (78%), mainly aldehydes (19 490.9μg kg-1) despite the higher number of alcs. A decrease in LOX volatiles and a quick development of the ones linked to off-flavors (carboxylic acids, alcs., acetates) were observed, in particular after 4 days of storage at room temperature Only storage at 4 °C allowed these phenomena to be slowed down. To preserve the natural phenolic phytocomplex of fresh olive pomace before drying and to avoid off-flavors development, storage in open containers must be avoided and a short storage in cold rooms (7-10 days) is to be preferred. 2021 The Authors. Journal of The Science of Food and Agriculture published by John Wiley & Sons Ltd on behalf of Society of Chem. Industry.

Journal of the Science of Food and Agriculture published new progress about Alcohols Role: BSU (Biological Study, Unclassified), PRP (Properties), BIOL (Biological Study). 111-11-5 belongs to class esters-buliding-blocks, name is Methyl octanoate, and the molecular formula is C9H18O2, Category: esters-buliding-blocks.

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

Cecchi, Lorenzo published the artcileExploitation of virgin olive oil by-products (Olea europaea L .): phenolic and volatile compounds transformations phenomena in fresh two-phase olive pomace (′alperujo′) under different storage conditions, Quality Control of 123-29-5, the main research area is olive oil Olea europaea phenolic volatile compound storage condition; HS-SPME-GC-MS; nutraceuticals; olive mill by-products; olive pomace storage; polyphenols; secoiridoids.

Much effort has recently been spent for re-using virgin olive oil byproducts as nutraceutical ingredients for human diet thanks to their richness in bioactive phenols, but their management is not easy for producers. We aimed to provide useful information for a better management of fresh olive pomace before drying, by studying the phenolic and volatile compounds transformations phenomena of fresh olive pomace stored under different conditions planned to simulate controlled and uncontrolled temperature conditions in olive oil mills. The evolution of the phenolic and volatile compounds was studied by high-performance liquid chromatog.-diode array detector mass spectrometry (HPLC-DAD-MS) and headspace solid-phase microextraction gas chromatog.-mass spectrometry (HS-SPME-GC-MS). The phenolic profile varied rapidly during storage: the verbascoside content decreased about 70% after 17 days even at 4 °C, while the content of simple phenols such as hydroxytyrosol and caffeic acid increased over time. The low temperature was able to slow down these phenomena. A total of 94 volatile organic compounds (VOCs) were detected in the fresh olive pomace, with a prevalence of lipoxygenase (LOX) VOCs (78%), mainly aldehydes (19 490.9μg kg-1) despite the higher number of alcs. A decrease in LOX volatiles and a quick development of the ones linked to off-flavors (carboxylic acids, alcs., acetates) were observed, in particular after 4 days of storage at room temperature Only storage at 4 °C allowed these phenomena to be slowed down. To preserve the natural phenolic phytocomplex of fresh olive pomace before drying and to avoid off-flavors development, storage in open containers must be avoided and a short storage in cold rooms (7-10 days) is to be preferred. 2021 The Authors. Journal of The Science of Food and Agriculture published by John Wiley & Sons Ltd on behalf of Society of Chem. Industry.

Journal of the Science of Food and Agriculture published new progress about Alcohols Role: BSU (Biological Study, Unclassified), PRP (Properties), BIOL (Biological Study). 123-29-5 belongs to class esters-buliding-blocks, name is Ethyl nonanoate, and the molecular formula is C11H22O2, Quality Control of 123-29-5.

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

Wang, Bin published the artcileProtein disulfide isomerases (PDIs) negatively regulate ebolavirus structural glycoprotein expression in the endoplasmic reticulum (ER) via the autophagy-lysosomal pathway, Formula: C12H9N3O5S, the main research area is protein disulfide isomerase glycoprotein ebolavirus ER autophagy lysosomal pathway; Autophagy; ER-phagy; ERAD; ERp57; EVD; ebola; filoviruses; glycoproteins; lysosomes; reticulophagy.

Zaire ebolavirus (EBOV) causes a severe hemorrhagic fever in humans and non-human primates with high morbidity and mortality. EBOV infection is dependent on its structural glycoprotein (GP), but high levels of GP expression also trigger cell rounding, detachment, and downregulation of many surface mols. that is thought to contribute to its high pathogenicity. Thus, EBOV has evolved an RNA editing mechanism to reduce its GP expression and increase its fitness. We now report that the GP expression is also suppressed at the protein level in cells by protein disulfide isomerases (PDIs). Although PDIs promote oxidative protein folding by catalyzing correct disulfide formation in the endoplasmic reticulum (ER), PDIA3/ERp57 adversely triggered the GP misfolding by targeting GP cysteine residues and activated the unfolded protein response (UPR). Abnormally folded GP was targeted by ER-associated protein degradation (ERAD) machinery and, unexpectedly, was degraded via the macroautophagy/autophagylysosomal pathway, but not the proteasomal pathway. PDIA3 also decreased the GP expression from other ebolavirus species but increased the GP expression from Marburg virus (MARV), which is consistent with the observation that MARV-GP does not cause cell rounding and detachment, and MARV does not regulate its GP expression via RNA editing during infection. Furthermore, five other PDIs also had a similar inhibitory activity to EBOV-GP. Thus, PDIs neg. regulate ebolavirus glycoprotein expression, which balances the viral life cycle by maximizing their infection but minimizing their cellular effect. We suggest that ebolaviruses hijack the host protein folding and ERAD machinery to increase their fitness via reticulophagy during infection.

Autophagy published new progress about Ebolavirus. 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, Formula: C12H9N3O5S.

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