Tag: M.W=150-200

Quan, Wenxuan published the artcileDynamics of volatile organic compounds in Masson pine (Pynus massonyana Lamb.) seedling needles under drought stress, Application In Synthesis of 111-11-5, the main research area is Pinus drought stress volatile organic compound seedling.

The aim of this study is to evaluate whether volatile organic compounds (VOCs) of Masson pine adapted their physiol. responses under drought stress or not. The needle length, root length, root/shoot ratio and the VOCs of Masson pine seedlings under drought stress were investigated by comprehensive two-dimensional gas chromatog. time of flight mass spectrometry (GCxGC-TOFMS). The results showed that the growth index was enhanced with the increase of stress strength, and the seedling growth, biomass, needle length, and root length were inhibited compared with the well-watered treatment. The amounts of total VOCs under drought stress were increased, the concentration of terpenoids, acids and esters, under drought stress were higher than the well-watered treatment, but the concentration of alcs. and carbonyl compounds was slightly decreased under the moderate drought treatment. Light drought, moderate drought, and severe drought compared with the well-watered treatment, increased the release of VOCs by 49, 50, and 49%, resp. The results show a key role of the VOCs released in the needles and therefore play a possible key role in drought resistance. This study provides evidence that the needles of Masson pine release more VOCs to adapt to drought conditions.

Pakistan Journal of Botany published new progress about Growth. 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

Karabagias, Ioannis K. published the artcileVolatile fingerprints of common and rare honeys produced in Greece: in search of PHVMs with implementation of the honey code, Name: Ethyl nonanoate, the main research area is honey volatile metabolite phenols terpenes norisoprenoids.

A non-targeted metabolomic methodol. using gas chromatog. coupled to mass spectrometry in combination with headspace solid-phase microextraction was applied for the identification of pharmaceutical honey volatile metabolites. Common and rare honeys (citrus, fir, honeydew, pine, thyme, asfaka, arbutus, chestnut, and cotton), in a total of 32 samples, were collected from different regions in Greece. Seventy-three volatile organic compounds (VOCs) were identified and semi-quantified using the internal standard method. Among volatiles, the norisoprenoid 3,4,6,6-tetramethylbicyclo[3.2.1]oct-3-ene-2,8-dione, was identified for the first time to contribute to Greek honey aroma. Pharmaceutical VOCs of interest included: terpenes, norisoprenoids benzene derivatives/phenolic volatiles and other compounds The content of such metabolites was affected by honey’s botanical origin (p < 0.05). The honey code was developed to construe differences among honey varieties with respect to semi-quant. data of pharmaceutical volatile metabolites. The exploitation of natural organic compounds for the treatment of diseases is of great value. European Food Research and Technology published new progress about Abies. 123-29-5 belongs to class esters-buliding-blocks, name is Ethyl nonanoate, and the molecular formula is C11H22O2, Name: Ethyl nonanoate.

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

Karabagias, Ioannis K. published the artcileA decisive strategy for monofloral honey authentication using analysis of volatile compounds and pattern recognition techniques, Category: esters-buliding-blocks, the main research area is monofloral honey volatile compound pattern recognition.

In an effort to determine some undisputed markers of botanical origin, the volatile profile of Hellenic monofloral honeys was investigated using gas chromatog. coupled to mass spectrometry (GC-MS) in combination with headspace solid phase microextraction (HS-SPME). Different varieties of honey (citrus, fir, pine, and thyme) were analyzed and semi-quant. data of volatile compounds originating from 82 samples were subjected to multivariate anal. of variance (MANOVA). Results showed that by using only 9 volatiles [dill ether (0.012 mg kg-1), alpha-4-dimethyl-3-cyclohexene-1-acetaldehyde (0.030 mg kg-1), acetic acid Et ester (0.030-0.173 mg kg-1), octanoic acid Et ester (0.004-0.547 mg kg-1), methylanthranilate (0.030 mg kg-1), 2,2,4,6,6-pentamethyl-heptane (0.005-0.057 mg kg-1), phenylacetaldehyde (0.014-1.248 mg kg-1), cis-linalool oxide (0.007-0.010 mg kg-1), lilac aldehyde (isomer III) (0.032-0.437 mg kg-1)] honeys could be classified correctly according to botanical origin. The correct prediction rates were 93.9%, 96.8%, and 89.5%, based on the cross-validation method and using stepwise linear discriminant anal., training and holdout partitions (k-nearest neighbors anal.), resp. The efficiency of the discrimination model was confirmed further by application to mixed floral honeys and the use of the aforementioned consecutive pattern recognition techniques. The use of specific volatile compounds in combination with statistical tools may constitute a fast, decisive and accurate strategy for monofloral honey authentication.

Microchemical Journal published new progress about Abies. 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

Radhakrishnan, Rokesh published the artcileSustainable approach for the treatment of poultry manure and starchy wastewater by integrating dark fermentation and microalgal cultivation, Quality Control of 110-42-9, the main research area is poultry manure starchy wastewater dark fermentation microalgal cultivation.

Dwindling fossil fuels, and the rise in energy demand have urged us to explore alternative renewable energy forms. An integrated process of dark fermentation and microalgal cultivation to deliver biofuels are gaining momentum in recent times. In this study, in the first stage, the starchy wastewater (SWW) with poultry manure (PM) was treated to produce a maximum hydrogen yield of 4.11 mol H2/Kg COD reduced to 5.03 mol H2/Kg COD reduced. The reutilization of soluble spent wash for the cultivation of Chlamydomonas reinhardtii yielded a biomass concentration of 1.45-1.02 g/L. The potentiality of algae to produce biodiesel was checked effectively, and it was reported that a biodiesel of 90.34 g/Kg Algal Biomass to 119.61 g/Kg Algal was yielded. The integration of the process enhanced the overall energy with an efficient removal of organic content. In conclusion, the valorisation of PM with SWW through dark fermentation and microalgal cultivation will open avenues to generate sustainable bioenergy forms.

Journal of Material Cycles and Waste Management published new progress about Algae. 110-42-9 belongs to class esters-buliding-blocks, name is Methyl decanoate, and the molecular formula is C11H22O2, Quality Control of 110-42-9.

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

Anand, Manasa published the artcileIntegrated Biodiesel and Biogas Production from Chlamydomonas reinhardtii, Related Products of esters-buliding-blocks, the main research area is biodiesel biogas Chlamydomonas transesterification anaerobic digestion.

In this study, we focus on the production of energy efficient Biodiesel and Biomass, whose principle is to extract the maximum amount of energy from biomass, the biodiesel production i.e. the lipid extraction from the biomass through the transesterification process and the residue is then subjected for the anaerobic process for biogas (methane) production and the leftover residue can be used for various other purposes. From this study we observed that cultivation of microalgae in open pond system using fertilizer as nutrients will reduce the most of biomass production since construction of and use of open ponds is cheaper than using photobioreactors thereby reducing the fixed capital investment. Using fertilizers as nutrient source will decrease the working capital , thus reduction in overall process but major problems like salt precipitation, evaporation and change in pH due to external environment were observed in open pond; these can be overcome by taking extra care and optimization. Gas chromatog.-Mass spectroscopy (GC-MS) anal. of crude biodiesel sample confirmed the presence of fatty acid Me ester (biodiesel). The green circle in GC-MS anal. ndicates presence of decanoic acid Me ester. The maximum amount of biogas produced was 10 cm3 in 27 days. The maximum amount of biogas produced from the algal biomass was 12 cm3 for 18 – 27 days. The Gross calorific value was found to be 333 kcal/kg. The percentage of methane present was found to be 2.5% and the percentage of carbon dioxide present was found to be 2.59%.From the energy balance, the calorific value of the biogas produced from the residue after lipid extraction was found to be 0.81 kcal. From the feasibility study conducted, it was found that the cost of new media’s formulated using fertilizers is approx. ten times less than High Salt Media thereby reducing the overall cost which improves the economics of biodiesel production

International Journal of Pharma and Bio Sciences published new progress about Algae. 110-42-9 belongs to class esters-buliding-blocks, name is Methyl decanoate, and the molecular formula is C11H22O2, Related Products of esters-buliding-blocks.

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

Gonzalez Flores, Melisa published the artcileSaccharomyces uvarum isolated from patagonian ciders shows excellent fermentative performance for low temperature cidermaking, Product Details of C9H10O2, the main research area is apple chicha cidermaking fermentation Saccharomyces; Biodiversity; Ciders; Cryotolerance; Domestication; Patagonia; Saccharomyces uvarum.

Saccharomyces uvarum has been recovered from natural habitats and traditionally fermented beverages (apple chicha) in Patagonia. However, this species has never been obtained from industrially relevant beverages like wine or cider in the same region. In this work, different strains belonging to the cryotolerant species S. uvarum were recovered from spontaneous cider fermentations carried out at low temperature in Red Delicious apple must. The strain S. uvarum NPCC1420 obtained from this cider and selected for its physiol. and technol. features, evidenced a better adaptation to the cidermaking process than a previously selected strain obtained from a less industrialized product called apple chicha. Some differences, like a higher ethanol and sulphite tolerance, seemed to be associated with differential domestication pressures suffered by each different strain. Moreover, the most important fermentative features of the strain NPCC1420 were a higher competition capacity than the strain NPCC1314 in non-sterile apple must, as well as significantly higher amounts of glycerol, 2-phenylethanol and 2-phenylethyl acetate than the strain isolated from apple chicha.

Food Research International published new progress about Apple. 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

Cozzolino, Rosaria published the artcileBiochemical characterization of apple slices dried using low temperature and stored in modified atmosphere packaging, Application of Methyl octanoate, the main research area is apple slice temperature biochem characterization atm packaging.

Apple slices (Pinova cv) dried at mild temperature (40°C), compared to 65°C dried slices, are enriched (up to about 50%) in polyphenols (e.g., catechin, epicatechin, quercetin 3-glucoside, quercetin derivatives). Chem. (dipping solutions) and phys. (packaging) treatments are key in controlling the enzymic browning of dried apple slices and maintain their nutritional content. In the present study we investigated the effects of dipping and packaging on the physicochem. properties of dried apple slices. Specifically, apple slices dried at 40°C were comparatively dipped in 1% calcium citrate (CC) or 1% citric acid (CA) and stored in active modified atm. (a-MA) or in passive (p-MA) for 100 days. A mild drying approach combined with dipping in CC and a-MA preservation, produced high quality dried apple slices, both in terms of sensory characteristics and color retention. Remarkably, upon this treatment, fruits exhibited an enhanced volatile profile that correlated with fresh and fruity apple notes.

Journal of Food Composition and Analysis published new progress about Apple. 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

Giannetti, Vanessa published the artcileFlavour fingerprint for the differentiation of Grappa from other Italian distillates by GC-MS and chemometrics, Application of Ethyl octanoate, the main research area is flavor fingerprint grappa differentiation distillate chemometrics.

An HS-SPME/GC-MS procedure was optimized in order to characterize the aromatic fingerprint of 82 spirit drinks, belonging to Grappa GI samples and other distillates. “”Grappa”” is a geog. indication (GI) allowed by EC Regulation No 110/2008 only for Italian-made grape marc spirit. Multivariate chemometric techniques were applied to the collected chromatog. profiles in order to classify the samples on the basis of chem. information provided by their volatile composition data. Partial Least Squares-Discriminant Anal. (PLS-DA) showed natural grouping of samples highlighting good classification results, providing a good separation between the two distillate categories with high prediction accuracy (the total classification rate on the external test set was 95%). In addition, VIP scores of PLS-DA models were calculated, allowing to identify a reduced number of volatile compounds which are relevant for discrimination of the different categories. Also Soft Independent Modeling by Class Analogies (SIMCA) was tested to build class models for predictive classification purposes. The proposed approach may represent a powerful tool suitable to assess the authenticity of Grappa GI samples and, hence, it may help to protect this product from possible frauds by verifying whether samples comply with the product specification.

Food Control published new progress about Apple. 106-32-1 belongs to class esters-buliding-blocks, name is Ethyl octanoate, and the molecular formula is C10H20O2, Application of Ethyl octanoate.

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

Tian, Tian-Tian published the artcileMulti-objective evaluation of freshly distilled brandy: Characterisation and distribution patterns of key odour-active compounds, Application of Ethyl nonanoate, the main research area is distilled brandy odor stillage 3methylbutanol ethyl hexanoate octanoate; AD, aroma descriptor; AEDA, aroma extract dilution analysis; Distillation cut; FD, flavor dilution; Freshly distilled brandy; GC-O-MS, gas chromatography-olfactometry-mass spectrometry; HS-SPME, headspace solid-phase microextraction; MS, mass spectra; OAV, odour activity value; Odour-active compounds; PCA, principal component analysis; PLS-DA, partial least squares discriminant analysis; Partial least squares discriminant analysis; Principal component analysis; RI, retention indices; SAFE, solvent-assisted flavour evaporation; Std, standards; VIP, variable importance in projection.

The characterization and distribution patterns of key odor-active compounds in head, heart1, heart2, tail, and stillage cuts of freshly distilled brandy were investigated by gas chromatog.-olfactometry-mass spectrometry coupled with aroma extract dilution anal. (AEDA) and chemometrics anal. Results from AEDA showed that there were 50, 61, 48, 25, and 18 odor-active compounds in the head, heart1, heart2, tail, and stillage cuts, resp. Besides, 19, 22, 11, 5, and 4 quantified compounds with odor activity values ≥ 1, resp., were considered to be potential contributors to the aroma profile of different distillation cuts. Especially, the chemometrics anal. illustrated the heart1 fraction was characterized by 3-methylbutanol, Et hexanoate, 1-hexanol, Et octanoate, benzaldehyde, Et decanoate, and 2-phenylethyl acetate; (E)-hex-3-en-1-ol, (Z)-hex-3-en-1-ol, and 2-phenylethyl acetate greatly contributed to the characteristics of the heart2 cut. Furthermore, different volatile compounds with a variety of b.ps. and solubilities followed diverse distillation rules during the second distillation Our findings may provide a rational basis for concentrating more pleasant aroma components contributing to brandy.

Food Chemistry: X published new progress about Brandy. 123-29-5 belongs to class esters-buliding-blocks, name is Ethyl nonanoate, and the molecular formula is C11H22O2, Application of Ethyl nonanoate.

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

Vatavali, Kornilia A. published the artcilePhysicochemical, spectroscopic, and chromatographic analyses in combination with chemometrics for discrimination of geographical origin of greek graviera cheeses, Quality Control of 110-42-9, the main research area is graviera cheese physicochem spectroscopic chromatog analysis chemometrics; chemometric analysis; fatty acids; geographical discrimination; graviera cheese; minerals; physicochemical parameters; volatile compounds.

Seventy-eight graviera cheese samples produced in five different regions of Greece were characterized and discriminated according to geog. origin. For the above purpose, pH, titratable acidity (TA), NaCl, proteins, fat on a dry weight basis, ash, fatty acid composition, volatile compounds, and minerals were determined Both multivariate anal. of variance (MANOVA) and linear discriminant anal. (LDA) were applied to exptl. data to achieve sample geog. discrimination. The results showed that the combination of fatty acid composition plus minerals provided a correct classification rate of 89.7%. The value for the combination of fatty acid compositions plus conventional quality parameters was 94.9% and for the combination of minerals plus conventional quality parameters was 97.4%. When cheeses of the above five geog. origins were combined with previously studied graviera cheeses from six other geog. origins collected during the same seasons in Greece, the resp. values for the discrimination of geog. origin of all eleven origins were 89.3% for conventional quality parameters plus minerals; 94.0% for conventional quality parameters plus fatty acids; 94.1% for minerals plus fatty acids; and 95.2% for conventional quality parameters plus minerals plus fatty acids. Such high correct classification rates demonstrate the robustness of the developed statistical model.

Molecules published new progress about Cheese. 110-42-9 belongs to class esters-buliding-blocks, name is Methyl decanoate, and the molecular formula is C11H22O2, Quality Control of 110-42-9.

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