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... Polyfurfuryl alcohol (PFA) is a biobased thermoset like matrix with high thermal performances and cork powder or cork granules are side stream product from cork stoppers’ production . They were processed together via compression molding. Structural investigations were made by means of FT-IR and thermo-mechanical measurements were performed using tensile tests, thermogravimetric analyses (TGA) and ...
Termitidae; abdomen; alcohols; antennae; eggs; enantiomers; headspace analysis; hemolymph; long term experiments; reproduction; sesquiterpenoids; social insects; tissues
Abstract:
... The queens of advanced social insects maintain their reproductive monopoly by using exocrine chemicals. The chemistry of these “queen pheromones” in termites is poorly known. We show that primary queens of four higher termites from the subfamily Syntermitinae (Embiratermes neotenicus, Silvestritermes heyeri, Labiotermes labralis, and Cyrilliotermes angulariceps) emit significant amounts of the ses ...
Cerambycidae; acetate esters; acetates; alcohols; field experimentation; flight; indigenous species; jars; males; pheromones; sesquiterpenoids; traps; Eastern United States
Abstract:
... Males of several species in the large cerambycid beetle subfamily Lamiine, native to South and North America, are known to produce aggregation-sex pheromones composed of three related structures: the sesquiterpene catabolic product geranylacetone, its corresponding alcohol (known as fuscumol), and the acetate ester of the alcohol (fuscumol acetate). Here, we show that males of two lamiine species ...
... 1-methylcyclopropene (1-MCP) negatively affects peach aroma but the underlying molecular basis remains elusive. In this study, transcriptomics and metabolite analyses were carried out to investigate the regulatory mechanisms of 1-MCP on peach aroma from different standpoints: fatty acid (FA) metabolism, ethylene signal transduction and lipoxygenase/β-oxidation pathway during 20 °C storage. Results ...
Gibbs free energy; alcohols; algorithms; automation; case studies; chemistry; computer software; industrial applications; process design; theoretical models
Abstract:
... Excess Gibbs energy (Gᴱ) or activity-coefficient models have a strong niche in applied thermodynamics since they provide an effective method to correlate and estimate phase equilibrium for nonideal systems. The history of their development is well represented by many papers in the technical literature, and notably in the five score and ten years of publications in Industrial & Engineering Chemistr ...
... The analysis and modeling of the sorption behaviors in glassy polymers, of gases and vapors in particular, is of crucial relevance for a variety of different applications. Due to the peculiar behaviors associated with the nonequilibrium character of polymer glasses, different approaches have been used so far to describe gas solubility, whose dependence on penetrant pressure or activity shows a bro ...
... Co single atoms anchored on ultrathin two-dimensional nitrogen-doped carbon (Co SAs/2D N–C) were in situ derived from 2D metal–organic frameworks (MOFs). These ultrathin nanosheets functionalized by the isolated Co atoms possess a high density of active sites and accessible surfaces, exhibiting an exceptional catalytic performance in the oxidation of silanes. ...
... A transition-metal-free catalytic system has been developed for selective transformation of alcohol to aldehydes or ketones. The reactions were performed with 3-(tert-butoxycarbonylamino)-9-azabicyclo[3.3.1]nonane N-oxyl (3-BocNH-ABNO) as the catalyst, NaNO2 as the co-catalyst, molecular oxygen as the terminal oxidant, and AcOH as the solvent under room temperature. This catalytic system exhibited ...
... Fluorotelomer alcohols (FTOHs) are fluorinated intermediates used in manufacturing specialty polymer and surfactants, with 8:2 FTOH the homologue of largest production. FTOHs were found to pose acute toxicity, hepatotoxicity, nephrotoxicity, developmental toxicity and endocrine‐disrupting risks, whereas research regarding immunotoxicity and its underlying mechanism, especially on specific immune c ...
... 8:2 Fluorotelomer alcohol (8:2 FTOH) is widely used in houseware and industrial goods and is ubiquitous in the surrounding environment. 8:2 FTOH has been linked to hepatoxicity, nephrotoxicity, and reproductive toxicity, as well as endocrine‐disrupting effects. However, as of yet, the research regarding immunotoxicity of 8:2 FTOH remains largely limited. In the present study, adult male C57BL/6 mi ...
... Fluorotelomer alcohols (FTOHs, F(CF₂)ₙCH₂CH₂OH) are members of per- and polyfluoroalkyl substances (PFASs) and are increasingly used in surfactant and polymer industries. FTOHs pose hepatotoxicity, nephrotoxicity and endocrine-disrupting risks. Nevertheless, there is limited research on the immunotoxic effects of FTOHs. In this study, we examined the immunotoxicity of 8:2 FTOH (n = 8) on murine ma ...
... Different alcoholic beverages can have different effects on blood alcohol concentration (BAC) and neurotoxicity, even when equalized for alcohol content by volume. Anecdotal evidence suggested that natural wine is metabolized differently from conventional wines. This triple-blind study compared the BAC of 55 healthy male subjects after consuming the equivalent of 2 units of alcohol of a natural or ...
... A Ba/Pd cooperative catalysis system was developed to enable the dehydrative cross-coupling of allylic alcohols with P-ylides to occur directly and promote a subsequent Wittig reaction in one pot. A variety of multisubstituted 1,4-dienes were isolated in good to excellent yields with broad P-ylides (stabilized by both ester and ketone carbonyl groups) and aldehyde (aliphatic and aromatic) substrat ...
... Rising demands of energy give rise to carbon dioxide emissions associated with the use of fossil fuels. This issue of increasing emissions open the areas of alternative sources which are renewable and have a lower environmental impact. Alcohol contains a large amount of oxygen and have great potential to reduce exhaust emissions. This study is focused on the use of bio-fuels and presents a mini re ...
... A protecting group-free strategy is presented for diastereo- and enantioselective routes that can be used to prepare a wide variety of Z-homoallylic alcohols with significantly higher efficiency than is otherwise feasible. The approach entails the merger of several catalytic processes and is expected to facilitate the preparation of bioactive organic molecules. More specifically, Z-chloro-substitu ...
... Starch‐based nanocomposites have been popular in food packaging for decades, particularly starch‐polyvinyl alcohol‐nanoparticle systems. To further improve the performance of these nanocomposites, α‐amylase, and pullulanase are used to adjust the structure and properties of the starch‐polyvinyl alcohol (PVOH)‐laponite RD (LRD) nanocomposite films. The α‐amylase‐treated films show increased elongat ...
alcohols; alkynes; chemical bonding; chemical reactions; chemical structure
Abstract:
... A complementary process to the Pauson–Khand annulation is described that is well suited to forging densely substituted/oxygenated cyclopentenone products (including fully substituted variants). The reaction is thought to proceed through a sequence of metallacycle-mediated bond-forming events that engages an internal alkyne and a β-keto ester in an annulation process that forges two C–C bonds. A va ...
alcohols; alkylation; amines; catalysts; chemical structure; hydrogen; manganese
Abstract:
... A highly active Mn(I) catalyst based on a nonsymmetric PN³-ligand scaffold for the N-alkylation of amines with alcohols utilizing the borrowing hydrogen methodology is reported. A broad range of anilines and the more challenging aliphatic amines were alkylated with primary and secondary alcohols. Moreover, the combination of low catalyst loadings and mild reaction conditions provides high efficien ...
... To derive dietary patterns (DPs) of Lebanese adolescents (10–18 years) and evaluate associations between identified DPs and household food insecurity (HFI). Data was drawn from a national survey on a representative sample of Lebanese households (n = 1204, 2015). HFI was assessed using a locally-validated, Arabic-translated version of the Household Food Insecurity Access Scale. Dietary intake was a ...
Mediterranean diet; alcohols; body mass index; ceramides; cross-sectional studies; energy intake; fish; fruits; legumes; liquid chromatography; mass spectrometry; nuts; physical activity; progeny; red meat; regression analysis; saturated fats; smoking (habit); vegetables; whole grain foods; women
Abstract:
... A Mediterranean style diet may impact cardiometabolic health by modifying concentrations of circulating lipid species. Distinct circulating ceramide species are positively associated with cardiometabolic risk; whereas, ratios of very-long to long-chain ceramides demonstrate an inverse association. We evaluated the relation between consuming a Mediterranean-style diet with concentrations of three c ...
... A new protocol for the alkylation of aromatic amines has been described using alcohols in the presence of SmI₂ as a catalyst with the generation of water as the sole byproduct. The reaction proceeds under MW conditions and selectively generates monoalkylated amines. This protocol features a broad substrate scope and good functional-group tolerance with moderate to high yields. ...
... Despite the widespread consumption of ethanol, mechanisms underlying its anesthetic effects remain uncertain. n-Alcohols induce anesthesia up to a specific chain length and then lose potency—an observation known as the “chain-length cutoff effect.” This cutoff effect is thought to be mediated by alcohol binding sites on proteins such as ion channels, but where these sites are for long-chain alcoho ...
... A recent study in the Journal of Wine Economics presented forecasts of future alcohol consumption derived using the ARIMA (Box–Jenkins) method. Alcohol consumption forecasts can be developed using many different methodologies. In this Note we highlight the value of using multiple methods to develop alcohol consumption forecasts, and demonstrate the capability of the R software platform as a genera ...
alcohols; diagnostic techniques; disease models; fatty liver; high fat diet; incidence; liver; protein kinases
Abstract:
... The worldwide incidence of fatty liver disease continues to rise, which may account for concurrent increases in the frequencies of more aggressive liver ailments. Given the existence of histologically identical fatty liver disease subtypes, there is a critical need for the identification of methods that can classify disease and potentially predict progression. Herein, we show that a panel of prote ...
... We describe here the syntheses of optically pure (3aS,4S,7aR)-hexahydro-4H-furo[2,3-b]pyran-4-ol and (3aR,4R,7aS)-hexahydro-4H-furo[2,3-b]pyran-4-ol. These stereochemically defined heterocycles are important high-affinity P2 ligands for a variety of highly potent HIV-1 protease inhibitors. The key steps involve an efficient Paternò–Büchi [2 + 2] photocycloaddition, catalytic hydrogenation, acid- ...
Jie S. Zhu; Julio M. Larach; Robert J. Tombari; Phillip W. Gingrich; Stanley R. Bode; Jeremy R. Tuck; Hunter T. Warren; Jung-Ho Son; Whitney C. Duim; James C. Fettinger; Makhluf J. Haddadin; Dean J. Tantillo; Mark J. Kurth; David E. Olson
alcohols; chemical structure; emulsions; geometry; hydrazides; isomerization; pharmacology; surfactants
Abstract:
... Photoswitches capable of accessing two geometric states are highly desirable, especially if their design is modular and incorporates a pharmacophore tethering site. We describe a redox isomerization strategy for synthesizing p-formylazobenzenes from p-nitrobenzyl alcohol. The resulting azo-aldehydes can be readily converted to photoswitchable compounds with excellent photophysical properties using ...
alcohols; ammonium salts; chemical reactions; chemical structure; ethers; feathers; filtration; quaternary ammonium compounds; sulfuryl fluoride
Abstract:
... A simple, practical and gram-scale process for direct transformation of primary alcohols or silyl ethers to ammonium salts was developed. This method has the feathers of easy work-up (a simple filtration), mild condition, high yield, great practicality and robustness. And the application of the ammonium salts in Suzuki coupling reaction was also accomplished. ...
... Performing selective transformations on complex substrates remains a challenge in synthetic chemistry. These difficulties often arise due to cross-reactivity, particularly in the presence of similar functional groups at multiple sites. Therefore, there is a premium on the ability to perform selective activation of these functional groups. We report here a supramolecular strategy where encapsulatio ...
... Sustainable biodiesel production can be realised by the use of a low-cost feedstock, efficient energy and renewable raw materials. The simultaneous Calophyllum oil-resin extraction and its purification using a binary solvent (n-hexane mixed with alcohol) were examined to meet those aspects. The extraction conditions effect was investigated to determine the optimal oil yield and quality. n-Hexane m ...
... An imidazole-functionalised cage is synthesised that can coordinate to Cu(i). X-ray analysis reveals a T-shaped coordination of copper by the imidazole ligands reminiscent of the coordination geometry found in enzymatic active sites. This cage complex can catalyse the oxidation of benzylic alcohols to benzaldehydes utilizing oxygen as the terminal oxidant. ...
... Slow-release fertilizer has been proven to be more effective than traditional fertilizer for providing a long-term stable nutrient supply. Although such fertilizers have been widely investigated, their water-retention properties and biodegradability have not been fully analysed. Composites of fertilizers and polymers provide opportunities to prepare new types of fertilizer with enhanced properties ...
... A facile and efficient method to form a chiral multi-substituted 3H-spiro[benzofuran-2,1′-cyclopentane] structural unit has been developed via a one-pot [3+2] cyclization/semipinacol rearrangement cascade. A catalysis system of Cu(ii)/BOX has been used to efficiently construct a key stereogenic center via a cyclization between substituted benzoquinones and allylic alcohols affording the desired pr ...
... In this communication, a chiral squaramide-catalyzed asymmetric dearomative tandem annulation reaction of unmodified Morita–Baylis–Hillman alcohols with azomethine imines has been achieved through a kinetic resolution of MBH alcohols under mild conditions, giving pharmaceutically interesting functionalized hetero-bicyclo[3.3.1]nonane derivatives in good to excellent yields with excellent enantiose ...
... Blue mold caused by Penicillium expansum is a major postharvest disease of apple fruit, which leads to fruit loss and patulin accumulation. In this study, ‘Delicious’ and ‘Fuji’ apples were inoculated with P. expansum to investigate effects of infection on physiology, quality and release of volatile compounds. The results showed that P. expansum significantly promoted ethylene production, increase ...
... Graphene oxide (GO)/GO-I2 co-catalyzed green synthesis of tosylaziridine bearing keto and nitrile/ester functional groups is reported. The strategy involves sequential GO-catalyzed oxidation of benzylic alcohol and GO-I2 catalyzed nitrene insertion into olefin of Morita-Baylis-Hillman adduct. Operational simplicity, use of water as solvent, ambient reaction conditions, excellent yield of products ...
... Ionic liquid bonded polysiloxanes (PILs) are a class of polysiloxanes whose side chains contain ionic liquid (IL) moieties. Considering their excellent selectivity and thermo-stability, PILs have great potentials in the development of polar stationary phases for gas chromatography. In this paper, a novel synthesis strategy for PILs is proposed to diversify PIL stationary phases and also facilitate ...
alcohols; catalytic activity; chemical reactions; ethers; gold; moieties
Abstract:
... A gold(i)-catalysed three-component reaction between alcohols (and water), α-aryl-α-diazoesters and allenamides has been developed, affording three-component products, tert-allylic ethers (and alcohols), in moderate to excellent yields with excellent geometric selectivity (E : Z > 20 : 1). In addition, this transformation proceeds smoothly with high functional group tolerance and a broad substrate ...
acetic acid; alcohols; chemical bonding; chemical structure; cycloaddition reactions; diastereoselectivity; lactones; regioselectivity; zinc
Abstract:
... The 1,3-dipolar cycloaddition of keto- and aldonitrones with N-arylitaconimides proceeds regioselectively giving only 5-spiroisoxazolidines. In the case of aldonitrones the reaction proceeds with high diastereoselectivity. A range of the obtained adducts were subjected to reductive cleavage of the NO bond using zinc powder in acetic acid to give the corresponding spirolactones and 1,3-amino alcoho ...
... Introdução: O estilo de vida é caracterizado como um padrão de comportamento que pode ter efeito na saúde e está relacionado a aspectos que refletem atitudes, valores e oportunidades. Objetivo: Realizar uma revisão sistemática de artigos publicados sobre a influência do estilo de vida no estado nutricional de idosos. Materiais e Métodos: Foram pesquisados artigos publicados em três bases de pesqui ...
... This study aimed to reveal the flavor formation and elucidate the key components responsible for the Dahe black pig dry-cured ham. In this study, 172 hams were processed using the traditional method, and volatile flavor compounds of 24 hams were investigated using gas chromatography–mass spectrometry (GC–MS) and comprehensive multivariate data analysis. 407 volatile flavor compounds were identifie ...
... A surfactant based oxodiperoxo molybdenum complex, which could activate molecular oxygen, has been employed as a catalyst for controlled oxidation of benzylic alcohols to corresponding carbonyls. The oxidation reactions were carried out under aqueous environment, however, in the absence of any extraneous base or co-catalyst. Sensitive/oxidizable functional groups like cyano, sulfide, hydroxyl, ary ...
... A new rare 14-nordrimane-type sesquiterpenoid, named phomanolide (1), together with five known compounds, (–)-6-methoxymellein (2), 7-hydroxy-3, 5-dimethyl-isochromen-1-one (3), norlichexanthone (4), 6-methylsalicylic acid (5), and gentisyl alcohol (6), were obtained from the culture broth of an endophytic fungus Phoma sp. isolated from the roots of Aconitum vilmorinianum. The structure of compoun ...
... Downstream purification processes often determine the manufacturing costs of biotechnological products, particularly for those with high yields in the upstream synthesis processes. Rhamnolipids are important biosurfactants with promising industrial applications. Significant research has been focused on optimizing rhamnolipid production in the upstream fermentation but there are very few studies on ...
... Three thermophilic Nanoarchaeota-Crenarchaeota symbiotic systems have been described. We obtained another stable anaerobic enrichment culture at 80°C, pH 6.0 from a New Zealand hot spring. The nanoarchaeote (Ncl-1) and its host (NZ3T) were isolated in co-culture and their genomes assembled. The small (∼200nm) flagellated cocci were often attached to larger cocci. Based on 16S rRNA gene similarity ...
... BACKGROUND: Several types of phospholipases have been described in phospholipids modification. The majority of phospholipase D (PLD) superfamily members can catalyze two separate reactions: the hydrolysis of phospholipids to produce phosphatidic acid (PA) and the transphosphatidylation of phosphatidyl groups into various phosphatidyl alcohols to produce modified phospholipids. Transphosphatidylati ...
... The targeted synthesis of three-dimensional covalent organic frameworks (3D COFs) is a great challenge, especially those synthesized by using a new kind of organic linkage. Herein, for the first time, a novel 3D azine-linked COF (3D-HNU5) has been synthesized and characterized. It is shown that the obtained 3D COF has a 2-fold interpenetrated diamond topology, and shows good chemical/thermal stabi ...
Prunus cerasus; Saccharomyces cerevisiae; alcohols; bioprocessing; cellulose; cherries; esters; fermentation; freeze drying; fruit juices; fruit wines; gas chromatography-mass spectrometry; headspace analysis; odors; raw materials; solid phase microextraction; storage time; temperature; winemaking; yeasts
Abstract:
... The aim of this study was to develop a bioprocess for low temperature fruit wine making from ready-to-use freeze-dried raw materials: sour cherry (Prunus cerasus) juice and the psychrotolerant and alcohol resistant yeast strain Saccharomyces cerevisiae AXAZ-1 immobilized on porous delignified cellulose. The effect of storage time of the freeze-dried raw materials at 4°C (0, 30, and 60 days) on the ...
... Biodiesel refers to be the future of fuel due to its distinctive properties, such as biodegradability, renewability, non-toxicity, and the net reduction in sulfur and carbon emission. The use of microwave as a heat source intensifies biodiesel synthesis process. The drastic reduction in reaction time for a homogeneous and heterogeneous catalyst is associated with the non-thermal and thermal effect ...
alcohols; carbon dioxide; chemical reactions; nanoparticles; nanosilver; polymers; silver; surface area
Abstract:
... A Rose bengal-functionalized porous organic polymer (RB-POP) was prepared with a specific surface area of up to 562 m² g⁻¹. In the presence of 1,8-diazabicyclo[5.4.0]undec-7-ene, RB-POP supported Ag(0) nanoparticles exhibited excellent performance for catalyzing cyclization of propargyl alcohols with CO₂ at 30 °C, achieving a TOF of 5000 h⁻¹, the highest value among the reported ones. ...
... With the increasing of oil demand and the decreasing of conventional crude oil production, unconventional crude oil is gaining interest. A flow improver (FI) was synthesized and designed a series of methods for investigating the effect of the flow improver on the asphaltene and resin of two unconventional crude oil samples. Changes in the morphology of the solid samples, as determined by scanning ...