Tag: M.W=100-150

de-la-Fuente-Blanco, Arancha published the artcileFourteen ethyl esters of wine can be replaced by simpler ester vectors without compromising quality but at the expense of increasing aroma concentration, Name: Ethyl 3-hydroxybutanoate, the main research area is ethyl ester wine aroma; Aroma enhancement; Aroma integration; Aroma suppression; Fruity; Isointensity; OAV; Odour quality; Subthreshold.

Aroma contribution of individual esters has been studied in complex mixtures mimicking red wine models. A mixture containing 14 Et esters at concentrations found in wine (V1) was prepared and kept as reference Isointense and qual. similar aroma vectors with a reduced number of esters (V2-V7) were prepared Those vectors were introduced in two reconstituted wines to assess whether simpler vectors could replace V1 without compromising wine quality. In the simpler young wine model, V1 could be replaced by a vector containing just 3 odorants (Et 2-methylbutyrate, Et butyrate and hexanoate). In the oaky model, a vector containing just Et 2-methylbutyrate (V7) could replace V1 without any discernible sensory change. Results also reveal that sub- or perithreshold odorants play outstanding roles on the overall odor intensity of the mixture and that aroma simplification concomitantly implies an increase in the amount of odorant required to keep the intensity of the aroma vector.

Food Chemistry published new progress about ethyl ester wine aroma; Aroma enhancement; Aroma integration; Aroma suppression; Fruity; Isointensity; OAV; Odour quality; Subthreshold. 5405-41-4 belongs to class esters-buliding-blocks, name is Ethyl 3-hydroxybutanoate, and the molecular formula is C6H12O3, Name: Ethyl 3-hydroxybutanoate.

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

Onkarappa, Sharath Bandibairanahalli published the artcilePreparation of alkyl levulinates from biomass-derived 5-(halomethyl)furfural (X = Cl, Br), furfuryl alcohol, and angelica lactone using silica-supported perchloric acid as a heterogeneous acid catalyst, Quality Control of 539-88-8, the main research area is alkyl levulinate halomethylfurfural furfuryl alc lactone silica perchloric acid; biomass heterogeneous acid catalyst.

This work reports the synthesis of a series of alkyl levulinates from biomass-derived 5-(halomethyl)furfural (X = Cl, Br), furfuryl alc., and angelica lactone using silica-supported perchloric acid (HClO4-SiO2) as a heterogeneous acid catalyst. The solvent-free, one-pot preparation afforded levulinate esters in excellent isolated yields (> 84%). The reactions were performed at 120 °C for 6 h in a batch-type glass pressure reactor using XMF and furfuryl alc. in presence of excess of the alc. reagent and 4 weight% of the HClO4-SiO2 catalyst (0.028 mmol HClO4). Furthermore, the reaction protocol was extended for the synthesis of ALs starting with angelica lactone at 90 °C for 2 h in a round-bottomed flask by using excess alc. and 4 weight% of the HClO4-SiO2 catalyst.

Biomass Conversion and Biorefinery published new progress about Angelica. 539-88-8 belongs to class esters-buliding-blocks, name is Ethyl 4-oxopentanoate, and the molecular formula is C7H12O3, Quality Control of 539-88-8.

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

Anitha, Rajan published the artcileAnti-corrosive potential of Cyperus rotundus as a viable corrosion inhibitor for mild steel in sulphuric acid, Formula: C7H12O3, the main research area is cyperus rotundus mild steel sulfuric acid corrosion inhibitor.

Over the past decade, plant extracts are ultimate green candidatures to substitute the expensive and noxious synthetic corrosion inhibitors. In this regard, this study aims to focus on evaluating anti-corrosion properties of green inhibitor Cyperus rotundus (C. rotundus), a perennial herb found throughout India. Design/methodol./approach: The biocompatible components present in C. rotundus extract was analyzed by gas chromatog.-mass spectroscopy anal. Findings: Predominant components such as octadecanoicacid, ethylester, n-hexadecanoic acid, pentanoicacid-4-oxoethyl ester, cyclotrisiloxane, hexamethyl, cyclotetrasiloxane and octamethyl were identified from the extract of C. rotundus. Impedance study demonstrated that the addition of inhibitor reduces the double-layer capacitance and increases the charge transfer resistance. Furthermore, polarization studies indicated that the extract of C. rotundus acted as a mixed-type inhibitor with decrease in corrosion c.d. with increase in concentration AFM study evinced the formation of inhibitor film on mild steel surface. The donor-acceptor interactions of active sites of predominant phytoconstituents were substantiated by computational anal. (DFT). Originality/value: This paper deals with the inhibition effect of extract of C. rotundus on mild steel in 0.5M H2SO4. C. rotundus has a capability to adsorb on the metal surface, thus hindering corrosion.

Pigment & Resin Technology published new progress about Band gap. 539-88-8 belongs to class esters-buliding-blocks, name is Ethyl 4-oxopentanoate, and the molecular formula is C7H12O3, Formula: C7H12O3.

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

Zheng, Xiu-Cheng published the artcilePreparation and catalytic performance of tungstophosphoric acid anchored to SiO2@graphene aerogel 3D porous catalysts for the synthesis of ethyl levulinate biofuel, Related Products of esters-buliding-blocks, the main research area is ethyl levulinate biofuel esterification catalyst levulinic acid ethanol; tungstophosphoric acid silica graphene aerogel porous catalyst.

As fuel additives, Et levulinate (EL) can be used up to 5 wt% directly in the regular diesel engines, which can overcome the limited stock of fossil fuels and reduce the environment pollutions to some extent. In this work, the three-dimensional porous hybrids consisting of SiO2 and graphene aerogel, which are denoted as SiO2@GA, are facilely assembled and used as supports for H3PW12O40 (HPW)-based solid acid catalysts. Structural anal. confirms that the resultant HPW/SiO2@GA catalysts possess unique porous structure (SBET ≥ 257 m2 g-1, Vp ≥ 0.450 cm3 g-1) and exhibit excellent catalytic performance in the synthesis of EL by the esterification of levulinic acid (LA) with ethanol. The conversion of LA can be as high as 92.4% under the reaction conditions. Furthermore, various catalytic reaction parameters are also optimized over the 10 weight% HPW/SiO2@GA catalysts, which exhibit the highest turnover frequency (TOF = 83.91 mmol g-1 h-1) among the resultant catalysts. The results confirm the promising application of the HPW/SiO2@GA heterogeneous catalysts in the synthesis of biofuel.

Journal of Porous Materials published new progress about Aerogels. 539-88-8 belongs to class esters-buliding-blocks, name is Ethyl 4-oxopentanoate, and the molecular formula is C7H12O3, Related Products of esters-buliding-blocks.

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

Gyori, Eniko published the artcileSupercritical CO2 extraction and selective adsorption of aroma materials of selected spice plants in functionalized silica aerogels, Application of Ethyl 4-oxopentanoate, the main research area is supercritical CO2 extraction squalene spathulenol adsorption silica aerogel.

Static supercritical fluid extraction has been used to concentrate the aroma materials of common herbs and spices. The technique has provided a higher number of components and cleaner extract than the one-step ethanol maceration. The one-step supercritical fluid extraction of the aroma compounds has been combined with their in situ adsorption in hydrophilic and hydrophobic silica aerogels. The extracts have been analyzed by a GC-MS technique and 55 aroma compounds have been identified. Most of the compounds have been adsorbed in both polar and apolar silica aerogels with no direct connection with the surface polarity. However, previously undetected compounds enriched to an anal. significant level, while others competed with each other for the active sites on the surface. Functionalized silica aerogels can be used as a new type of aroma storage materials and as selective and tuneable adsorbents for the extraction and enrichment of potentially active components from a complex matrix.

Journal of Supercritical Fluids published new progress about Aerogels. 539-88-8 belongs to class esters-buliding-blocks, name is Ethyl 4-oxopentanoate, and the molecular formula is C7H12O3, Application of Ethyl 4-oxopentanoate.

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

Xi, Xiaojun published the artcileInfluence of cluster thinning and girdling on aroma composition in ′Jumeigui′ table grape., COA of Formula: C6H12O3, the main research area is table grape terpene linalool cluster thinning girdling.

Cluster thinning and girdling are common and simple practices applied to improve berry quality in table grape cultivation. However, there is limited information about the accumulation and biosynthesis of the entire aromatic profile under cluster thinning and girdling, notably in table grapes. This research investigated the influences of cluster thinning and girdling (alone or in combination) on aroma profiles particularly the changes in biosynthesis and accumulation of Muscat flavored related compds from veraison to harvest in Jumeigui grape. Cluster thinning and girdling (alone or in combination) significantly increased the concentrations of total soluble solids (TSS) and key aromatic compounds at harvest, with higher concentrations of both under cluster thinning than girdling. Berry weight and titratable acidity (TA) were unaffected by cluster thinning, girdling, or in combination at harvest. Linalool the most abundant and active odorant related to Muscat flavor, accumulated in 28.6% and 20.2% higher concentrations from cluster thinning than control and girdling at maturity, resp. Furthermore, higher DXS3 transcript abundance in cluster thinning groups might contribute to the increased accumulation of terpenes and linalool in Jumeigui grape. The results will contribute to further understand the mechanism of source/sink ratio modulation on aroma accumulation and better apply cluster thinning and girdling for grape production

Scientific Reports published new progress about Alcohols. 5405-41-4 belongs to class esters-buliding-blocks, name is Ethyl 3-hydroxybutanoate, and the molecular formula is C6H12O3, COA of Formula: C6H12O3.

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

Kurkiewicz, S. published the artcileContemporary analytical techniques reveal the secret composition of a 19th century Jerusalem Balsam, Formula: C4H8O3, the main research area is vanillic acid Impatiens volatile compound.

In 1719, Antonio Menzani di Cuna from the Saint Savior monastery published an alc. extract formula made from plant and herb resins under the name Jerusalem Balsam. The Balsam gained high popularity due to its remedial benefits. At the end of the 19th century, Jerusalem Balsam produced by the hermit Johannes Treutler was found to be particularly popular. We analyzed a sample of a valuable find coming from the last decade of the 19th century, making it probably the oldest surviving Jerusalem Balsam in the world. The purpose of this work was to investigate the composition of the historical sample and to try to determine the origin of its components. This was achieved by comparing the profile of volatile compounds extracted from the balsam using HS-SPME technique with the profile characteristic for plant resins as classic ingredients of the Johannes Treutler formula. The use of two chromatog. columns of different polarity, as well as the transformation of the polar components of the sample into TMS derivatives, allowed to obtain new information on the historical composition of the Balsam. Also, it can be stated with high probability that plant resins were indeed used in the production of the Balsam as referred to in the original recipe of Johannes Treutler. We also discuss challenges in determining the original composition of the Balsam.

Pharmazie published new progress about Impatiens. 623-50-7 belongs to class esters-buliding-blocks, name is Ethyl 2-hydroxyacetate, and the molecular formula is C4H8O3, Formula: C4H8O3.

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

Kurkiewicz, S. published the artcileContemporary analytical techniques reveal the secret composition of a 19th century Jerusalem Balsam, SDS of cas: 539-88-8, the main research area is vanillic acid Impatiens volatile compound.

In 1719, Antonio Menzani di Cuna from the Saint Savior monastery published an alc. extract formula made from plant and herb resins under the name Jerusalem Balsam. The Balsam gained high popularity due to its remedial benefits. At the end of the 19th century, Jerusalem Balsam produced by the hermit Johannes Treutler was found to be particularly popular. We analyzed a sample of a valuable find coming from the last decade of the 19th century, making it probably the oldest surviving Jerusalem Balsam in the world. The purpose of this work was to investigate the composition of the historical sample and to try to determine the origin of its components. This was achieved by comparing the profile of volatile compounds extracted from the balsam using HS-SPME technique with the profile characteristic for plant resins as classic ingredients of the Johannes Treutler formula. The use of two chromatog. columns of different polarity, as well as the transformation of the polar components of the sample into TMS derivatives, allowed to obtain new information on the historical composition of the Balsam. Also, it can be stated with high probability that plant resins were indeed used in the production of the Balsam as referred to in the original recipe of Johannes Treutler. We also discuss challenges in determining the original composition of the Balsam.

Pharmazie published new progress about Impatiens. 539-88-8 belongs to class esters-buliding-blocks, name is Ethyl 4-oxopentanoate, and the molecular formula is C7H12O3, SDS of cas: 539-88-8.

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

Kurkiewicz, S. published the artcileContemporary analytical techniques reveal the secret composition of a 19th century Jerusalem Balsam, Recommanded Product: Ethyl 3-hydroxybutanoate, the main research area is vanillic acid Impatiens volatile compound.

In 1719, Antonio Menzani di Cuna from the Saint Savior monastery published an alc. extract formula made from plant and herb resins under the name Jerusalem Balsam. The Balsam gained high popularity due to its remedial benefits. At the end of the 19th century, Jerusalem Balsam produced by the hermit Johannes Treutler was found to be particularly popular. We analyzed a sample of a valuable find coming from the last decade of the 19th century, making it probably the oldest surviving Jerusalem Balsam in the world. The purpose of this work was to investigate the composition of the historical sample and to try to determine the origin of its components. This was achieved by comparing the profile of volatile compounds extracted from the balsam using HS-SPME technique with the profile characteristic for plant resins as classic ingredients of the Johannes Treutler formula. The use of two chromatog. columns of different polarity, as well as the transformation of the polar components of the sample into TMS derivatives, allowed to obtain new information on the historical composition of the Balsam. Also, it can be stated with high probability that plant resins were indeed used in the production of the Balsam as referred to in the original recipe of Johannes Treutler. We also discuss challenges in determining the original composition of the Balsam.

Pharmazie published new progress about Impatiens. 5405-41-4 belongs to class esters-buliding-blocks, name is Ethyl 3-hydroxybutanoate, and the molecular formula is C6H12O3, Recommanded Product: Ethyl 3-hydroxybutanoate.

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

Ren, Dezhang published the artcileCatalytic transfer hydrogenation of ethyl levulinate into γ-valerolactone over air-stable skeletal cobalt catalyst, Formula: C7H12O3, the main research area is skeletal cobalt HZSM catalyst catalytic hydrogenation ethyl levulinate GVL.

A fast and easy handled batch air diffusion method (BA) was developed to obtain a non-pyrophoric, air-stable skeletal Co catalyst (A-SCo) for catalytic transfer hydrogenation (CTH) of Et levulinate (EL) into γ-valerolactone (GVL). A batch air diffusion method (BA) consumed the active adsorbed H2 on the surface of skeletal Co (SCo) but maintained structure catalyst and avoided excessive oxidation of metallic Co, Ni and Al. The 96% yield of GVL was obtained over the A-SCo and HZSM-5 at 140°C. Further study of CTH process shows that metallic state of A-SCo provides important active sites for dehydrogenation of i-PrOH, which is critical step for hydrogenation of EL. This study provides a simple, efficient method to prepare an air-stable skeletal metal catalyst for CTH and hydrogenation process.

Journal of Environmental Chemical Engineering published new progress about Pore size. 539-88-8 belongs to class esters-buliding-blocks, name is Ethyl 4-oxopentanoate, and the molecular formula is C7H12O3, Formula: C7H12O3.

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