Category: alcohols-buliding-blocks

Han, Dong published the artcileCharacterization and discrimination of Chinese marinated pork hocks by volatile compound profiling using solid phase microextraction gas chromatography-mass spectrometry/olfactometry, electronic nose and chemometrics, SDS of cas: 505-10-2, the main research area is volatile compound marinated pork hock SPE GCMS; Chinese marinated pork hocks; characterization; discrimination; key odour-active compounds; odour activity value; potential flavour markers.

The primary aim of this study was to investigate volatile constituents for the differentiation of Chinese marinated pork hocks from four local brands, Dahongmen (DHM), Daoxiangcun (DXC), Henghuitong (HHT) and Tianfuhao (TFH). To this end the volatile constituents were evaluated by gas chromatog.-mass spectrometry/olfactometry (GC-MS/O), electronic nose (E-nose) and chemometrics. A total of 62 volatile compounds were identified and quantified in all pork hocks, and 24 of them were considered as odor-active compounds because their odor activity values (OAVs) were greater than 1. Hexanal (OAV at 3.6-20.3), octanal (OAV at 30.3-47.5), nonanal (OAV at 68.6-166.3), 1,8-cineole (OAV at 36.4-133.3), anethole (OAV at 5.9-28.3) and 2-pentylfuran (OAV at 3.5-29.7) were the key odor-active compounds contributing to the integral flavor of the marinated pork hocks. According to principal component anal. (PCA) and partial least squares-discriminant anal. (PLS-DA) of GC-MS/O and E-nose data, the results showed that the marinated pork hocks were clearly separated into three groups: DHM, HHT, and DXC-TFH. Nine odor-active compounds, heptanal, nonanal, 3-carene, D-limonene, β-phellandrene, p-cymene, eugenol, 2-ethylfuran and 2-pentylfuran, were determined to represent potential flavor markers for the discrimination of marinated pork hocks. This study indicated the feasibility of using GC-MS/O coupled with the E-nose method for the differentiation of the volatile profile in different brands of marinated pork hocks.

Molecules published new progress about Chemometrics. 505-10-2 belongs to class alcohols-buliding-blocks, name is 3-(Methylthio)propan-1-ol, and the molecular formula is C4H10OS, SDS of cas: 505-10-2.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Behbahani, Persia published the artcileEphedrine Analysis in Real Urine Sample via Solvent Bar Microextraction Technique Coupled with HPLC-UV and Chemometrics, Product Details of C8H18O, the main research area is ephedrine urine solvent bar microextraction HPLC UV.

Background: Ephedrine, an alpha/beta-adrenergic agonist, is one of the most common doping agents not only among athletes but also the ordinary people, therefore its detection at low trace levels with a sensitive and cost effective method has become a priority to investigate many anal. methods. Objective: In this work, solvent bar microextraction followed by high-performance liquid chromatog. (HPLC-UV) was used for extraction and determination of ephedrine at low trace levels from urine samples at optimum condition. Methods: In this study, a designed experiment was carried out using solvent bar microextraction technique, which has been proved to be a green method. This method requires three phases consisting of a donor phase with an alk. pH, an acceptor phase with an acidic pH, and organic solvent to impregnate the pores of the hollow fiber. The obtained results were used for estimating the optimum ranges for each parameter, analyzing the effect of different parameters, simultaneously. Results: Under optimized circumstances, the preconcentration factor was 129. The calibration curves represented good linearity for urine sample with coefficient estimations higher than 0.9991. The limit of detection and quantitation for ephedrine were 16.7 ug L-1 and 50 ug L-1, resp. The relative standard deviations of anal. were 3.5% within a day (n=3) and 4.1% between days (n=9). Conclusion: According to the results and previous studies, it can be concluded that the preconcentration factor for ephedrine was the best result ever reported considering selectivity and cost-effectiveness.

Current Pharmaceutical Analysis published new progress about Chemometrics. 111-87-5 belongs to class alcohols-buliding-blocks, name is n-Octanol, and the molecular formula is C8H18O, Product Details of C8H18O.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Tang, Ke published the artcileChemometric analysis of Chinese red wines using stir bar sorptive extraction combined with GC-MS analysis, Category: alcohols-buliding-blocks, the main research area is red wine stir bar sorptive extraction chemometrics GC MS.

The aim of this work was to compare EG-Silicone and PDMS polymeric phases based on stir bar sorptive extraction method for the anal. of volatile compounds in Chinese red wines. The impact of vintages, regions and grape varieties on volatile compounds was also evaluated, and chemometric analyses were applied to achieve a possible differentiation of the wines. The results demonstrated that EG-Silicone Twister high correlation coefficients and low standard deviations were obtained for 58 major volatile compounds of wine by use of EG-silicon. Significant differences in the levels of certain volatiles were observed according to cultivars, vintages and geog. origins through anal. of variance. A satisfactory linear discriminant anal. resulted for red wines on the basis of cultivars, vintages and geog. origins was observed, in which the correct classification was 100% and the leave-one-out validation accuracy was 96.3%.

European Food Research and Technology published new progress about Chemometrics. 505-10-2 belongs to class alcohols-buliding-blocks, name is 3-(Methylthio)propan-1-ol, and the molecular formula is C4H10OS, Category: alcohols-buliding-blocks.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Choutka, Jan published the artcileStraightforward synthesis of protected 2-hydroxyglycals by chlorination-dehydrochlorination of carbohydrate hemiacetals, Related Products of alcohols-buliding-blocks, the main research area is hydroxyglycal chlorination dehydrochlorination glycosyl chloride protecting group monosaccharide; 2-Hydroxyglycals; Carbohydrates; Dehydrochlorination; Glycals; Glycosyl chlorides.

A straightforward and scalable method for the synthesis of protected 2-hydroxyglycals is described. The approach is based on the chlorination of carbohydrate-derived hemiacetals, followed by an elimination reaction to establish the glycal moiety. 1,2-dehydrochlorination reactions were studied on a range of glycosyl chlorides to provide suitable reaction conditions for this transformation. Benzyl ether, isopropylidene and benzylidene protecting groups, as well as inter-glycosidic linkage, were found to be compatible with this protocol. The described method is operationally simple and allows for the quick preparation of 2-hydroxyglycals with other than ester protecting groups, providing a feasible alternative to existing methods.

Carbohydrate Research published new progress about Chlorination. 2595-07-5 belongs to class alcohols-buliding-blocks, name is (2R,3R,4S,5R,6R)-2-(Allyloxy)-6-(hydroxymethyl)tetrahydro-2H-pyran-3,4,5-triol, and the molecular formula is C9H16O6, Related Products of alcohols-buliding-blocks.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Yuasa, Masahiro published the artcileChemical composition and sensory properties of fermented citrus juice using probiotic lactic acid bacteria, Computed Properties of 97-67-6, the main research area is citrus juice probiotic lactic acid bacteria Lactobacillus plantarum.

We prepared three types of fermented citrus juice using probiotic lactic acid bacteria (Lactobacillus plantarum SI-1 and L. pentosus MU-1). The viable cell counts, chem. composition, and sensory properties of citrus juice were investigated and compared before and after fermentation Similar to probiotic foods, fermented citrus juice contains sufficient viable cell counts. Decreased concentrations of L-malic acid and specific free amino acids and increased concentration of lactic acid were observed in fermented citrus juice. However, the total sugar concentration remained unchanged. Therefore, L. plantarum SI-1 and L. pentosus MU-1 grow in citrus juice via malolactic fermentation Furthermore, no difference was observed in the sensory properties of citrus juice following lactic acid fermentation These findings demonstrate the growth mechanism of lactic acid bacteria in citrus juice and sensory properties of fermented citrus juices.

Food Bioscience published new progress about Citrus juice. 97-67-6 belongs to class alcohols-buliding-blocks, name is (S)-2-hydroxysuccinic acid, and the molecular formula is C4H6O5, Computed Properties of 97-67-6.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Rahmani, Zahra published the artcileOptimization of microwave-assisted extraction and structural characterization of pectin from sweet lemon peel, HPLC of Formula: 59-23-4, the main research area is sweet lemon peel pectin microwave assisted extraction structural characteristics; Monosaccharide composition; Physicochemical characterization; Sweet lemon peel pectin.

The microwave-assisted extraction of pectin from sweet lemon peel (SLP) was optimized using Box-Behnken design. The highest pectin yield (25.31%) was observed under optimal condition (microwave power of 700 W, irradiation time of 3 min and pH of 1.5). The physicochem., structural and some bioactivity of the SLP pectin isolated at optimum condition was evaluated. The SLP pectin was rich in galacturonic acid and galactose (87.2 mol%), high in mol. weight (615.836 kDa) and low in degree of esterification (1.2-35.1%). Furthermore, the SLP pectin was composed of 55.7% linear region (homogalacturonan) and 42.2% hairy region (rhamnogalacturonan-I). Also, the FT-IR and H-NMR results confirm the major presence of low methylated galacturonic acid rich structure in the isolated samples. In addition, SLP pectin showed good emulsifying and antioxidant properties. A pseudoplastic flow behavior was observed for SLP pectin solution at higher concentrations (1% w/v <). These results represent an inexpensive source for pectin extraction with high pectin yield and good properties. International Journal of Biological Macromolecules published new progress about Citrus limon. 59-23-4 belongs to class alcohols-buliding-blocks, name is (2R,3S,4S,5R)-2,3,4,5,6-Pentahydroxyhexanal, and the molecular formula is C6H12O6, HPLC of Formula: 59-23-4.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Lengyel, M. published the artcileStudy on process parameters and optimization of microencapsulation based on phase separation, Quality Control of 64519-82-0, the main research area is microencapsulation phase separation nonionic surfactant; Calcium alginate; Freeze-drying; Isomalt; Microcomputer tomography; Microparticle structure analysis; Reconstitution.

As surfactants are capable of influencing the droplet formation, our study primarily aims the investigation of the effect of a nonionic surfactant e.g. Polysorbate 80 on the formation of microspheres on the course of vibrating nozzle method with coacervation. The experiments also concern the impact of the different process parameters (e.g. vibration frequency, feed rate and voltage) on the shape and size distribution of microspheres characterized by laser diffraction size determination completed with particle image anal. The calcium-alginate microspheres were processed using freeze-drying to ensure solid state with better drug carrier capability. Addition of isomalt was advantageous in the formation of freeze-dried microspheres at low alginate concentration, which was explained by micro-CT anal. of the constructed particle structure. The internal three-dimensional network of calcium alginate demonstrated a more cancellous architecture ameliorating the roundness of microparticles.

European Journal of Pharmaceutical Sciences published new progress about Coacervation. 64519-82-0 belongs to class alcohols-buliding-blocks, name is (3R,4R,5R)-6-(((2S,3R,4S,5S,6R)-3,4,5-Trihydroxy-6-(hydroxymethyl)tetrahydro-2H-pyran-2-yl)oxy)hexane-1,2,3,4,5-pentaol, and the molecular formula is C12H24O11, Quality Control of 64519-82-0.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Burns, Jonathan D. published the artcileAstatine partitioning between nitric acid and conventional solvents: indication of covalency in ketone complexation of AtO+, SDS of cas: 111-87-5, the main research area is astatine partitioning nitrate conventional solvent covalency ketone complexation.

Astatine-211 has been produced at Texas A&M University on the K150 cyclotron, with a yield of 890 ± 80 MBq through the 209Bi(α,2n)211At reaction via an 8 h bombardment with a beam current of 4-8 μA and an α-particle beam energy of 28.8 MeV. The target was then dissolved in HNO3 and the extraction of 211At was investigated into a variety of organic solvents in 1-3 M HNO3. Extraction of 211At with distribution ratios as high as 11.3 ± 0.6, 12.3 ± 0.8, 42.2 ± 2.2, 69 ± 4, and 95 ± 6 were observed for diisopropyl ether, 1-decanol, 1-octanol, 3-octanone, and Me iso-Bu ketone, resp., while the distribution ratios for 207Bi were â‰?.05 in all cases. The extraction of 211At into both Me iso-Bu ketone and 3-octanone showed a strong, linear dependence on the HNO3 initial aqueous concentration and better extraction than other solvents. DFT calculations show stronger binding between the carbonyl oxygen of the ketone and the At metal center.

Chemical Communications (Cambridge, United Kingdom) published new progress about Complexation. 111-87-5 belongs to class alcohols-buliding-blocks, name is n-Octanol, and the molecular formula is C8H18O, SDS of cas: 111-87-5.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Joshi, Nishant published the artcileReactive Extraction of Gallic Acid Using Tributyl Phosphate in Different Classes of Diluents, Related Products of alcohols-buliding-blocks, the main research area is reactive extraction gallic acid tributyl phosphate diluent octanol toluene; ethyl acetate hexane diluent reactive extraction gallic acid TBP.

Gallic acid is an important carboxylic acid used in pharmaceutical industries owing to its medicinal properties. The separation of gallic acid from fermentation broth and dilute aqueous streams is a challenging task. Therefore, in the present study the reactive extraction of gallic acid from an aqueous solution by using tri-Bu phosphate in octanol, Et acetate, n-hexane, and toluene as diluents, resp., has been carried out at constant temperature (303 ± 1 K). The results were compared with those of the extraction using pure diluents in order to compute the intensification of extraction obtained. Experiments were performed to investigate the effect of initial acid concentration, extractant concentration, and diluent type. TBP + hexane was found to be most suitable solvent system resulting in the highest distribution coefficient (KD = 24) when TBP was employed at a concentration of 1.516 mol·kg-1. The equilibrium complexation constant (KE) was observed to be in the ranges of 3.18-8.8 for n-hexane, 0.91-4.54 for toluene, 2.295-4.546 for Et acetate, and 3.57-6.17 for octanol.

Journal of Chemical & Engineering Data published new progress about Complexation. 111-87-5 belongs to class alcohols-buliding-blocks, name is n-Octanol, and the molecular formula is C8H18O, Related Products of alcohols-buliding-blocks.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Kim, Seong-Yun published the artcileSelective Separation of Trivalent Europium(III) from Americium(III) using N,N’-Dimethyl-N,N’-di-2-phenylethyl-diglycol Amide (MPEDGA) Extractant in Ionic Liquid, HPLC of Formula: 110-99-6, the main research area is americium europium dimethyl diphenylethyl diglycol amide IL extractant separation.

A diglycolamide based N,N”-Dimethyl-N,N”-di-2-phenylethyl-diglycol amide (MPEDGA) extractant was synthesized and dissolved into 1-butyl-3-methylimidazolium nonafluorobutanesulfonate ([C4mim][NfO]) to prepare the extraction phase. Its separation performance of Am-241 with Eu-152 in nitric acid solution was investigated. The extraction kinetics were fast and could reach equilibrium within 15 min. When [HNO3] = 0.1 M, the maximum SFEu-152/Am-241 was obtained as 124. Moreover, with increase in the concentration of HNO3, the extraction ability decreased gradually, and SFEu-152/Am-241 decreased as 3 when [HNO3] reached 4 M. Back extraction was successfully completed by using 1 M guanidine carbonate with 0.5 M EDTA or 1 M guanidine carbonate with 0.5 M diethylenetriaminepentaacetic acid (DTPA), resp. Slope anal. revealed a 1:3 complex was formed. Effect of temperature further clarified the extraction process was exothermic.

Solvent Extraction Research and Development, Japan published new progress about Complexation. 110-99-6 belongs to class alcohols-buliding-blocks, name is 2,2′-Oxydiacetic acid, and the molecular formula is C4H6O5, HPLC of Formula: 110-99-6.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts