Category: 111-11-5

i Cortiella, Mariona Gil published the artcileChemical and physical implications of the use of alternative vessels to oak barrels during the production of white wines, HPLC of Formula: 111-11-5, the main research area is oak barrel white wine alternative vessel chem phys implication; Sauvignon Blanc; aging on lees; clay jars; concrete vessels; oval-shaped tanks; polyethylene vessels; stainless-steel tanks; white wine.

Recently, the use of alternative vessels to oak barrels during winemaking has become increasingly popular, but little is known about their impact on the chem. composition of the resulting wines. To address this issue, a Sauvignon Blanc wine was elaborated from the same grape juice by using cylindrical stainless-steel tanks, oval-shaped concrete vessels, oval-shaped polyethylene vessels, and clay jars in triplicate. Each vessel was used for alc. fermentation and the aging of wines over its own lees. Wines elaborated in concrete vessels showed the highest pH and the lowest titratable acidity, most likely related to the observed release of inorganic compounds from the concrete walls. Little effect of the vessels was seen on the wine color and phenolic composition Wines elaborated in clay jars showed the highest turbidity and the highest content of soluble polysaccharides, while those made using cylindrical stainless-steel tanks showed the highest content of volatile compounds Despite the observed differences, all of the vessels tested seem suitable for white wine production since every wine showed chem. features that corresponded with the quality standards of Sauvignon Blanc wines.

Molecules published new progress about Acidity. 111-11-5 belongs to class esters-buliding-blocks, name is Methyl octanoate, and the molecular formula is C9H18O2, HPLC of Formula: 111-11-5.

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

Liu, Sheng Hui published the artcileEffect of foliar iron sulfate on the fruit growth and quality of pineapple (Ananas comosus cv. Yellow Mauritius) planted in lateritic soil in Leizhou Peninsula, Recommanded Product: Methyl octanoate, the main research area is Ananas foliar iron sulfate fruit growth lateritic soil China.

Leizhou Peninsula in South China is facing a serious water shortage problem because of the special regional and geol. conditions. As a kind of low water requirement crop, pineapple has been popular in lateritic soil. However, the phys. characteristics of Lateritic soil such as too cohesive, impervious, low content of organic matter, and seasonal arid often bring some problem to pineapple cultivation. Seasonal iron deficiency can be easily observed from Apr. to July. The effect of foliar spray of iron sulfate (with concentration of 0, 0.5%, 0.75%, 1%) on the fruit growth and quality of pineapple cv. Yellow Mauritius were studied in this research. Showed that there were no significant difference (p>0.05) on the fruit weight, longitudinal diameter, transverse diameter among all the treatment. 0.75% treatment increased the fruit weight to 6.08% and decreased crown weight significantly. Both 0.75% and 1% iron sulfate treatment not only enhanced vitamin C extremely significantly, but also improved the aroma quality significantly with the increase of total esters, especially in the content of hexanoic acid Me ester, 3-(Me tio) propanoic acid Me ester and 2-methyl- butanoic acid Me ester. The content of these 3 esters above were all extremely significantly higher than control, which means much stronger pleasant aroma. Hence, 0.75% was the optimal concentration of foliar spray with iron sulfate in pineapple cv. Yellow Mauritius.

E3S Web of Conferences published new progress about Acidity. 111-11-5 belongs to class esters-buliding-blocks, name is Methyl octanoate, and the molecular formula is C9H18O2, Recommanded Product: Methyl octanoate.

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

Olegario, Lary Souza published the artcileChemical characterization of four Brazilian brown propolis: An insight in tracking of its geographical location of production and quality control, Application of Methyl octanoate, the main research area is chem characterization four brazilian brown propolis geog location production; Brazil; Brown propolis; GC–MS; Geographical origin; SPME; Volatiles.

The aim of this work was to undertake a detailed anal. on chem. constituents of brown propolis, originating from four different states (Bahia, Minas Gerais, Parana ́and Sergipe) of Brazil. The volatile profile was determined by using HS-SPME-GC-MS along with the determination of total phenolic compounds content, flavonoids and antioxidant activity. A total of 315 volatile compounds were identified, however, several of them have not been reported so far in the Brazilian brown propolis. The terpenes represented the major class with 40.92-84.66% of the total area in the chromatograms. PCA anal. of the majority of compounds successfully indicated the volatile profile of each propolis sample according to their geog. origin. The anal. of volatile compounds and its characterization also varied significantly and confirmed that these depended on the geog. area of collection of propolis. The data generated in this work may help in establishing criteria for quality control and tracking the specific region of propolis production in different states of Brazil.

Food Research International published new progress about Propolis. 111-11-5 belongs to class esters-buliding-blocks, name is Methyl octanoate, and the molecular formula is C9H18O2, Application of Methyl octanoate.

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

Martins, Zita E. published the artcileA chemometric approach to compare Portuguese native hops with worldwide commercial varieties, Category: esters-buliding-blocks, the main research area is hops linalool headspace solid phase microextraction GC mass spectrometry.

A diversity of native hops can be found in Portugal, but little is known concerning their volatile and sensory profiles. Nowadays, the exponential growth of the craft beer sector and the preference for more flavoured beers promote the research of unexplored wild hops that have the advantage of being well adapted to the Portuguese edaphoclimatic conditions. Therefore, the goal of this study was to characterize the volatile profile of 75 native Portuguese hops and compare with 34 com. varieties by means of headspace solid-phase microextraction gas chromatog./mass spectrometry (HS-SPME-GC/MS), in order to select those that present similarities with commercialized hops and confirm by check-all-that-apply (CATA) anal. if they present similar organoleptic characteristics. Due to the complexity of hop volatile profile and the great number of samples analyzed, robust chemometric treatment of chromatog. and sensorial data was required to make reliable conclusions. Twelve Portuguese hops present a volatile profile and sensory characteristics quite similar to some com. varieties, because 11 Portuguese hops were grouped with the European varieties Challenger, Hallertauer Magnum and Perle, both in volatile profile and sensory anal. and one clustered with American registered varieties.

Journal of Chemometrics published new progress about Taxonomy. 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

Karabagias, Ioannis K. published the artcileQuality and origin characterisation of Portuguese, Greek, Oceanian, and Asian honey, based on poly-parametric analysis hand in hand with dimension reduction and classification techniques, Synthetic Route of 111-11-5, the main research area is Castanea honey decanoic gluconic acid food quality Oceanian Asian.

Chestnut, heather, honeydew, multifloral, orange blossom and thyme honey samples obtained either from beekeepers or supermarkets from Portugal, Greece, Oceania and Asia, were characterised by means of poly-parametric anal.: palynol., °Brix, moisture, pH, elec. conductivity, free acidity, total dissolved solids, salinity, vitamin C, sp. weight, CIELAB color parameters, Pfund and color intensity determinations, along with bio-activity and volatile compounds analyses were carried out. Results showed that the botanical and geog. origin of honey samples had a similar impact on the determined parameters, using dimension reduction and classification techniques. Among them, moisture, °Brix, elec. conductivity, salinity, pH, color parameters L* and b*, color intensity, 1-hydroxy-2-propanone, benzaldehyde, 2-ethyl-1-hexanol, HMF and benzeneacetaldehyde were the potential markers related to the geog. and botanical origin of six honey varieties from different countries. Finally, the identification of methylglyoxal in Portuguese honeydew honey creates the basis for new research on the isolation and identification of this compound in European honey.

European Food Research and Technology published new progress about Acidity. 111-11-5 belongs to class esters-buliding-blocks, name is Methyl octanoate, and the molecular formula is C9H18O2, Synthetic Route of 111-11-5.

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

Owaba, Azibanasamesa D. C. published the artcilePhysicochemical and spectroscopic analysis of oils from Terminalia ivoriensis a Chev Combretaceae, HPLC of Formula: 111-11-5, the main research area is Terminalia oil seed extract physicochem spectroscopic analysis.

Terminalia ivoriensis A.Chev Combretaceae is a West African medicinal plant widely used by the Ijaws in the Niger Delta region of Nigeria for the treatment of malaria and management of erectile dysfunction in men. The Seeds were extracted using successive maceration at room temperature using n-hexane, dichloromethane and 70% methanol exhaustively and concentrated in vacuo, yielded 11.29, 10.03, and 0.954 percent of oily extracts resp. The samples were subjected to physicochem. anal. and the following parameters were obtained; 0.9104-0.9303, 1.466-1.474, 38.15-58.34mg/KOH, 84.2-115mg KOH/g, 15.23-24g I2/100g and 26-80meq/Kg, for relative d., refractive index, acid value, saponification value, iodine value, peroxide value resp. The GC-FID anal. of the oils showed that the oils contained 11 fatty acids and FT-IR result of the samples reveals that the oils contained fatty acid with a prominent characteristics peak at 1740 and 3004 cm-1 due to carbonyl and methoxyl group of esters resp. The physicochem. anal. revealed that the oils could be used for skincare, emollient, vehicle for topical agents and as an insect repellent in agriculture because of the pungent and irritating odor produced by the oils.

Asian Journal of Pharmaceutical Analysis and Medicinal Chemistry published new progress about Cropland. 111-11-5 belongs to class esters-buliding-blocks, name is Methyl octanoate, and the molecular formula is C9H18O2, HPLC of Formula: 111-11-5.

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

Dagaut, Philippe published the artcileEmission of carbonyl and polyaromatic hydrocarbon pollutants from the combustion of liquid fuels: impact of biofuel blending, Formula: C9H18O2, the main research area is carbonyl polyaromatic hydrocarbon biofuel pollutant combustion.

The combustion of conventional fuels (diesel and Jet A-1) with 10-20% vol oxygenated biofuels (ethanol, 1-butanol, Me octanoate, rapeseed oil Me ester (RME), di-Et carbonate, tri(propylene glycol)methyl ether, i.e., CH3(OC3H6)3OH, and 2,5-dimethylfuran (2,5-DMF)) and a synthetic paraffinic kerosene (SPK) was studied. The experiments were performed using an atm. pressure laboratory premixed flame and a four-cylinder four-stroke diesel engine operating at 1500 rpm. Soot samples from kerosene blends were collected above a premixed flame for anal. Polyaromatic hydrocarbons (PAHs) were extracted from the soot samples. After fractioning, they were analyzed by high-pressure liquid chromatog. (HPLC) with UV and fluorescence detectors. C1 to C8 carbonyl compounds (CBCs) were collected at the diesel engine exhaust on 2,4- dinitrophenylhydrazine coated cartridges (DNPH) and analyzed by HPLC with UV detection. The data indicated that blending conventional fuels with biofuels has a significant impact on the emission of both CBCs and PAHs adsorbed on soot. The global concentration of 18 PAHs (1-methyl-naphthalene, 2-methyl-naphthalene, and the 16 U.S. priority EPA PAHs) on soot was considerably lowered using oxygenated fuels, except 2,5-DMF. Conversely, the total carbonyl emission increased by oxygenated biofuels blending. Among them, ethanol and 1-butanol were found to increase considerably the emissions of CBCs.

Journal of Engineering for Gas Turbines and Power published new progress about Biofuels. 111-11-5 belongs to class esters-buliding-blocks, name is Methyl octanoate, and the molecular formula is C9H18O2, Formula: C9H18O2.

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

Rasulov, Suleiman M. published the artcileHigh-temperature and high-pressure density and liquid-vapor phase transition properties of methyl octanoate as main biofuel component, Safety of Methyl octanoate, the main research area is methyl octanoate temperature pressure density liquid vapor phase transition.

Thermodn. properties of compressed fuels as d. at liquids phase (PρT data) and two liquids-gas phases as saturated pressure, d., and temperature (PS,ρS,TS) are extremely important for engine performance as well as the transportation and storage of fuels. In this work single – and two-phase PρT data and liquid + gas phase equilibrium properties (PS,TS,ρS) of Me octanoate (caprylate) as one of the key components of biofuels have been studied. The measurements were performed along 15 liquid and vapor isochores between (44.7 and 832.0) kg·m-3 over a temperature range from (298 to 438) K at pressures up to 17.33 MPa using a constant-volume piezometer technique. The study was concentrated in the two-phase region to accurately determine vapor-pressures and in the immediate vicinity of the phase-transition temperatures to precisely determine the phase boundary properties (PS,ρS,TS) on the liquid + gas equilibrium curve. In the low temperature range (far from the critical point) where the values of vapor-pressure are negligible small (<1 kPa, approx. at temperatures below 350 K), the saturated vapor phase of Me octanoate was considered as ideal gas with volume of VG = RT/PS and ΔVLG ≈ VG = RT/PS, where the saturated liquid volume can be neglected, VG > > VL. This approach was used to simplify the calculation of the thermodn. properties of Me octanoate at saturation

Fuel published new progress about Biofuels. 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

Vannoni, Lorenzo published the artcileDisclosing the chemistry of oil curing by mass spectrometry using methyl linoleate as a model binder, Application In Synthesis of 111-11-5, the main research area is mass spectrometry methyl linoleate model binder oil curing.

The structure of the polymeric fraction in an oil painting is believed to be strongly connected to the stability of the paint layers over time, but its mol. characterization is extremely difficult given the complex composition of a vegetable oil-based polymer. In this study we report the implementation of a methodol. approach for the systematic mass spectrometric investigation of the mol. features of the products of oxidative degradation and crosslinking of oil paint layers upon curing. The approach is based on the use of Me linoleate as a simplified model of an oil paint binder. Gas-chromatog. coupled with mass spectrometry, solid phase microextraction gas chromatog. mass spectrometry, flow injection electrospray mass spectrometry and evolved gas anal. mass spectrometry, are used to analyze the evolution of compounds produced over seven months of natural ageing, from the volatile products to the macromol. and cross-linked fractions. The aim is to improve our fundamental mol. understanding of the curing process of oil paints, and to investigate the balance between oxidative degradation and crosslinking when specific binder-pigment combinations are in place. Model paint layers were prepared using lead white and ultramarine blue as pigments. These two pigments are known to produce paint layers with different stability over time. The use of Me linoleate as model oil binder greatly simplifies the mass spectral features of the lipid paint fraction, enabling the detection of products of oxidation and crosslinking with a new high level of mol. detail. Data clearly show that crucial differences between paints containing the two pigments establish with time, which are mostly related to the cross-linked fraction.

Microchemical Journal published new progress about Chemistry. 111-11-5 belongs to class esters-buliding-blocks, name is Methyl octanoate, and the molecular formula is C9H18O2, Application In Synthesis of 111-11-5.

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

Trinklein, Timothy J. published the artcileDetermination of the signal-to-noise ratio enhancement in comprehensive three-dimensional gas chromatography, Related Products of esters-buliding-blocks, the main research area is signal noise ratio enhancement three dimensional gas chromatog.

We investigate the extent to which comprehensive three-dimensional gas chromatog. (GC3) provides a signal enhancement (SE) and a signal-to-noise ratio enhancement (S/NRel) relative to one-dimensional (1D)-GC. Specifically, the SE is defined as the ratio of the tallest 3D peak height from the GC3 separation to the 1D peak height from the unmodulated 1D-GC separation A model is proposed which allows the analyst to predict the theor. attainable SE (SET) based upon the peak width and sampling d. inputs. The model is validated via comparison of the SET to the exptl. measured SE (SEM) obtained using total-transfer GC3 (100% duty cycle for both modulators) with time-of-flight mass spectrometry detection. Two exptl. conditions were studied using the same GC3 column set, differing principally in the modulation period from the 1D to 2D columns: 4 s vs. 8 s. Under the first set of conditions, the average SEM was 97 (±22), in excellent agreement with the SET of 97 (±18). The second set of conditions improved the average SEM to 181 (±27), also in agreement with the average SET of 176 (±26). The average S/NRel following correction for the mass spectrum acquisition frequency was 38.8 (±11.2) and 59.0 (±27.2) for the two sets of conditions. The enhancement in S/N is largely attributed to moving the signal to a higher frequency domain where the impact of “”low frequency”” noise is less detrimental. The findings here provide strong evidence that GC3 separations can provide enhanced detectability relative to 1D-GC and comprehensive two-dimensional gas chromatog. (GCxGC) separations

Analytical Chemistry (Washington, DC, United States) published new progress about Cryostats. 111-11-5 belongs to class esters-buliding-blocks, name is Methyl octanoate, and the molecular formula is C9H18O2, Related Products of esters-buliding-blocks.

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