Month: December 2022

Xie, Jianhua published the artcileA thermophilic fungal GH36 α-galactosidase from Lichtheimia ramosa and its synergistic hydrolysis of locust bean gum, Computed Properties of 59-23-4, the main research area is Lichtheimia alpha galactosidase hydrolysis locust bean gum; Lichtheimia ramosa; Synergistic hydrolysis; α-Galactosidase; β-mannanase.

A novel GH36 α-galactosidase gene (LrAgal36A) from Lichtheimia ramosa was synthesized and highly expressed in Pichia pastoris. The enzyme titer and protein yield for high-d. fermentation in a 5 L fermentor were up to 953.6 U mL-1 and 4.36 g L-1. Purified recombinant LrAgal36A showed the maximum activity at pH 6.0 and 65°C and was thermostable with a half-life of 70 min at 60°C. LrAgal36A displayed the highest specific activity (353.17 ± 4.19 U mg-1) toward p-nitrophenyl-α-D-galactopyranoside (pNPGal) followed by galacto-oligosaccharides and could act slightly on galactomannans. The Km and catalytic efficiency (kcat/Km) of LrAgal36A for pNPGal were 0.33 mM and 1569.50 mM-1 s-1, resp. LrAgal36A and GH5 β-mannanase from L. ramosa showed a significant synergistic effect on the degradation of locust bean gum (LBG), resulting in release more reducing sugars (1.56 folds) and galactose (7.6 folds) by simultaneous or sequential reactions. Due to its hydrolysis properties, LrAgal36A might have potential applications in the area of pulp biobleaching, feed and food processing.

Carbohydrate Research published new progress about Enzymic hydrolysis. 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, Computed Properties of 59-23-4.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Lu, Yao published the artcileEffect of 1-octanol on the stabilization of crude oil emulsions with hydrophobically modified polyacrylamide, Recommanded Product: n-Octanol, the main research area is octanol stabilization petroleum emulsion hydrophobically modified polyacrylamide.

The formation of a stable crude oil emulsion is of great significance for enhancing oil recovery in oilfield development. The effect of 1-octanol (C8OH) on the emulsifying properties of hydrophobically modified polyacrylamide (HMP) was studied based on a novel multiple light scattering method. The emulsions stabilized by different polymer systems were evaluated in terms of stability and rheol. properties. The obtained results show that the combined system of HMP + C8OH gives more stable emulsion with smaller droplet size compared to individual HMP. There is a strong bulk and interface interaction between HMP and C8OH for stabilizing emulsions, while such effect was observed neither between partially hydrolyzed polyacrylamide and 1-octanol nor between HMP and 1-octane. In the bulk phase of aqueous solution, the C8OH can be solubilized in the micro-domains of HMP, enhancing the intermol. association structure and slowing down the creaming rate of the corresponding emulsions. The adsorption at the oil-water interface of HMP can be enhanced and tighter interfacial film can be formed due to the formation of the hydrogen bond between HMP and C8OH. The obtained results are of obvious importance for designing the amphiphilic polymer-containing emulsion more suitable to improve oil recovery as well as for better understanding the self-assembling mechanism of amphiphilic polymers and fatty alcs.

Fuel published new progress about Emulsion stability. 111-87-5 belongs to class alcohols-buliding-blocks, name is n-Octanol, and the molecular formula is C8H18O, Recommanded Product: n-Octanol.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Gharibzahedi, Seyed Mohammad Taghi published the artcilePectin extraction from common fig skin by different methods: The physicochemical, rheological, functional, and structural evaluations, Formula: C6H12O6, the main research area is Ficus skin pectin physicochem rheol property HWE UAE MAE; Emulsification; Esterification; Fig (Ficus carica L.) fruit; Pectin extraction; Rheology; Structure.

Four extraction methods of hot-water (HWE), ultrasound-assisted (UAE), microwave-assisted (MAE), and ultrasound-microwave assisted (UMAE) were utilized to determine the best technique to extract pectin from the common fig (Ficus carica L.) skin. UMAE (11.71%) significantly showed a more extraction yield than MAE (9.26%), UAE (8.74%), and HWE (6.05%). A significant dose-dependent antioxidant capacity for pectins 1,1-diphenyl-2-picryl-hydrazyl (DPPH), and 2,2′-azinobis (3-ethylbenzothiazoline-6-sulfonicacid) (ABTS) radical scavenging activity was found. The UMAE-pectin with the maximum galacturonic acid content (76.85%) and mol. weight (6.91 × 103 kDa) presented the highest emulsifying activity (61.2-61.3%) and emulsion stability (94.3-95.2%) with a monomodal droplet size distribution at cold and ambient storage temperatures A non-Newtonian shear-thinning behavior was detected at 1.5-3.0% pectic-solutions X-ray diffraction (XRD) anal. showed a non-crystalline nature for pectins extracted by UMAE. FTIR spectroscopy and HPLC photodiode array detector revealed that conventional and novel extraction technologies do not change the chem. structure and monosaccharide composition of pectin significantly.

International Journal of Biological Macromolecules published new progress about Emulsion stability. 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, Formula: C6H12O6.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Nguyen, Bidong D. published the artcileImport of Aspartate and Malate by DcuABC Drives H2/Fumarate Respiration to Promote Initial Salmonella Gut-Lumen Colonization in Mice, Synthetic Route of 97-67-6, the main research area is import aspartate malate dcuabc drive fumarate respiration promote initial; salmonella gut lumen colonization mice; Salmonella; infection; intestine; metabolism; mouse model.

Initial enteropathogen growth in the microbiota-colonized gut is poorly understood. Salmonella Typhimurium is metabolically adaptable and can harvest energy by anaerobic respiration using microbiota-derived hydrogen (H2) as an electron donor and fumarate as an electron acceptor. As fumarate is scarce in the gut, the source of this electron acceptor is unclear. Here, transposon sequencing anal. along the colonization trajectory of S.Typhimurium implicates the C4-dicarboxylate antiporter DcuABC in early murine gut colonization. In competitive colonization assays, DcuABC and enzymes that convert the C4-dicarboxylates aspartate and malate into fumarate (AspA, FumABC), are required for fumarate/H2-dependent initial growth. Thus, S. Typhimurium obtains fumarate by DcuABC-mediated import and conversion of L-malate and L-aspartate. Fumarate reduction yields succinate, which is exported by DcuABC in exchange for L-aspartate and L-malate. This cycle allows S.Typhimurium to harvest energy by H2/fumarate respiration in the microbiota-colonized gut. This strategy may also be relevant for commensal E. coli diminishing the S.Typhimurium infection.

Cell Host & Microbe published new progress about Electron acceptors. 97-67-6 belongs to class alcohols-buliding-blocks, name is (S)-2-hydroxysuccinic acid, and the molecular formula is C4H6O5, Synthetic Route of 97-67-6.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Trombach, N. published the artcileSynthesis and electropolymerization of pyrrol-1-yl substituted phthalocyanines, HPLC of Formula: 50966-69-3, the main research area is pyrrolyl alkoxy phthalocyanine monomer preparation cyclotrimerization substitution; polypyrrole phthalocyanine preparation oxidative polymerization isolated electroactive group; redox potential electrochromism polypyrrole phthalocyanine conducting polymer.

Metal-free and Zn, Co, Ni – 2,9,16,23-Tetrakis(2-pyrrol-1-yl-alkoxy)phthalocyanines, in which the phthalocyanine is connected via an alkylene spacer to a pyrrole substituent, were prepared via three step reaction sequence to obtain monomers with groups for electropolymerization electronically isolated from the phthalocyanine. The synthesis sequence involves cyclotrimerization, substitution of NO2 groups with OH groups, then conversion to the phthalocyanine ring by the Li pentanolate method. Electrochem. oxidative polymerizations were carried out either under potentiodynamic conditions by scanning between 0.1 and 1.4 V vs. SCE at scan rate of 10 mV s-1 or at a fixed potential of 1.4 V vs. SCE. Polypyrrole films of thickness up to 5 μm were obtained on ITO electrodes. The UV/Vis spectra show the presence of phthalocyanine and polypyrrole structural units in the polymers. The charge-discharge redox process of the conducting polymers is accompanied by a reversible electrochromic color change. The polypyrrole-phthalocyanine films exhibit specific elec. conductivity of ∼10-5 S-cm-1.

Journal of Materials Chemistry published new progress about Cyclotrimerization. 50966-69-3 belongs to class alcohols-buliding-blocks, name is 3-(1H-Pyrrol-1-yl)propan-1-ol, and the molecular formula is C7H11NO, HPLC of Formula: 50966-69-3.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Pfeiffer, Peter published the artcileCopolymers of pyrrole and N-(hydroxypropyl)pyrrole: properties and interaction with DNA, Name: 3-(1H-Pyrrol-1-yl)propan-1-ol, the main research area is pyrrole hydroxypropy pyrrole copolymer elec conductivity chronoamperometry cyclic voltammetry; conducting polymer polypyrrole plasmid DNA complex lithium perchlorate dopant.

Copolymers derived from mixtures of pyrrole and N-(hydroxypropyl)pyrrole have been prepared electrochem. using various concentration ratios. Copolymers were generated on stainless electrodes by chronoamperometry and cyclic voltammetry in a LiClO4 acetonitrile solution Relevant phys. (d. and doping level) and electrochem. (electroactivity and electrostability) properties of the copolymers have been examined and compared with those of the two corresponding homopolymers, which were prepared using the same electrochem. procedures. Results show that the copolymer obtained using the 25:75 N-(hydroxypropyl)pyrrole:pyrrole molar ratio presents an interesting behavior. Finally, the ability of the latter copolymer to form specific interactions with plasmid DNA has been compared with that of polypyrrole.

Journal of Polymer Research published new progress about Cyclic voltammetry. 50966-69-3 belongs to class alcohols-buliding-blocks, name is 3-(1H-Pyrrol-1-yl)propan-1-ol, and the molecular formula is C7H11NO, Name: 3-(1H-Pyrrol-1-yl)propan-1-ol.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Gu, Jianhong published the artcileSolubility and Model Correlation of Amprolium Hydrochloride in Pure Solvent at the Temperature Range of 273.15-313.15 K, Safety of n-Octanol, the main research area is solubility model correlation amprolium hydrochloride pure solvent.

The solubility data of amprolium hydrochloride in 12 pure solvents including methanol, ethanol, n-propanol, isopropanol, n-butanol, i-butanol, n-octanol, acetone, Et acetate, 1,4-dioxane, acetonitrile, and cyclohexanone was determined at temperature range from T = 273.15 to 313.15 K. The maximum value was obtained in methanol (x = 12.99 × 10-4 at T = 313.15 K, in mole fraction) and the min. data in n-octanol (x = 2.0 × 10-6 at T = 273.15 K, in mole fraction). As expected, it increased with rising temperature in all of the selected solvents. The values from high to low obeyed the following sequence: methanol > acetone > cyclohexanone > ethanol > 1,4-dioxane > n-propanol > Et acetate > n-butanol > isopropanol > i-butanol > acetonitrile > n-octanol. Moreover, the results of IR spectrogram indicated that there was no polymorph transformation or solvate formation during the determination process. The modified Apelblat equation and λh equation were applied to correlate the solubility data. The maximum values of the root mean square deviation (RMSD) and relative average deviation (RAD) were 4.02 × 10-5 (in methanol) and 4.77% (in ethanol), resp. Moreover, two statistical values selected in modified Apelblat equation are significantly smaller than those in λh equation. Therefore, modified Apelblat equation is more suitable to correlate the solute solubility in selected solvents. More importantly, the solubility data will be significant to the engineers and researchers before recrystallization

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

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Toker, Omer Said published the artcileAlternative Tempering of Sugar-Free Dark Chocolates by βv Seeding: Sensorial, Micro-Structural and Some Physical Properties and Volatile Profile, Computed Properties of 64519-82-0, the main research area is dark chocolate seed microstructural phys property volatile profile.

In this study, sugar-free dark chocolate was produced from isomalt and maltitol by βV seeding technique as an alternative to conventional tempering process. The effect of βV seed concentrations on the particle size distribution, textural, rheol. and melting properties of the end products was studied, and the results were compared with those of conventional sugar-free dark chocolates. For this aim, conched dark chocolates were melted and crystallized with βV seeds added at different concentrations (0.5, 0.6, 0.7, 0.8, 0.9 and 1.0%, m/m). Conventional tempering process was performed by using temper machine (47-27-32°C). Brightness, chroma, whiteness index and tetra-Me pyrazine content (as marker compounds of dark chocolate volatile compound) were not influenced by seeding technique compared to conventional tempering method. The water activity of the dark chocolate samples was substantially affected by βV seed level according to used bulk sweetener. However, all the values were determined below 0.4 which is critical limit for chocolate. Regarding overall acceptability, sugar-free dark chocolates tempered by βv seeds had very close scores compared with conventional one, implying that sugar-free chocolates can be produced by βv crystals with desired quality characteristics similar to conventional samples. Results of this study showed that it is possible to produce sucrose-free dark chocolates by using βV seeds with desired quality similar to chocolate produced by using conventional tempering.

International Journal of Food Engineering published new progress about Crystal nucleation. 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, Computed Properties of 64519-82-0.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Du, Weichao published the artcileSynthesis of cyclohexanone-alcohol hemiketals and evaluation as flow improver for waxy crude oil, Quality Control of 111-87-5, the main research area is cyclohexanone alc hemiketal waxy crude oil flow improver.

In this paper, four novel cyclohexanone-alc. hemiketals (KL-1, KL-2, KL-3, KL-4) as waxy crude oil flow improver have been prepared by cyclohexanone and 1-pentanol, 1-Hexanol, 1-heptanol, 1-octanol. Evaluation results demonstrate the hemiketal compounds have obvious effect on the viscosity and pour point of Henan crude oil. DSC anal. showed that waxing point and waxing peak decreased to a certain degree in 0.05% hemiketal solutions Wax crystal morphol. anal. indicated the four hemiketals played a role of nucleation in the process of waxy crude oil decoagulation, and in that way acts as waxy crude oil flow improver.

Petroleum Science and Technology published new progress about Crystal morphology. 111-87-5 belongs to class alcohols-buliding-blocks, name is n-Octanol, and the molecular formula is C8H18O, Quality Control of 111-87-5.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Kulyal, Poonam published the artcileVariable secondary metabolite profiles across cultivars of Curcuma longa and Curcuma aromatica, COA of Formula: C10H18O, the main research area is diarylheptanoid santolina alc Zingiberaceae essential oil; Curcuma aromatica Salisb; Curcuma longa L.; GC-MS; LC-MS; essential oil; metabolomics; secondary metabolites.

Curcuma spp. (Zingiberaceae) are used as a spice and coloring agent. Their rhizomes and essential oils are known for medicinal properties, besides their use in the flavoring and cosmetic industry. Most of these biol. activities were attributed to volatile and nonvolatile secondary metabolites present in the rhizomes of Curcuma spp. The metabolite variations among the species and even cultivars need to be established for optimized use of Curcuma spp. Objectives: We compared the phytochem. profiles of rhizomes and their essential oils to establish the variability among seven cultivars: five of Curcuma longa L. (Alleppey Supreme, Duggirala Red, Prathibha, Salem, Suguna) and two of C. aromatica Salisb. (Kasturi Araku, Kasturi Avidi). The GC-MS and LCMS-based analyses were employed to profile secondary metabolites of these selected cultivars. Rhizomes of Curcuma spp. were subjected to hydro-distillation to collect essential oil and analyzed by GC-MS. The methanol extracts of fresh rhizomes were subjected to LC-MS analyses. The compounds were identified by using the relevant MS library databases as many compounds as possible. The essential oil content of the cultivars was in the range of 0.74-1.62%. Several compounds were detected from the essential oils and rhizome extracts by GC-MS and LC-MS, resp. Of these, 28 compounds (13 from GCMS and 15 from LCMS) were common in all seven cultivars, e.g., α-thujene, and diarylheptanoids like curcumin. Furthermore, a total of 39 new compounds were identified from C. longa L. and/or C. aromatica Salisb., most of them being cultivar-specific. Of these compounds, 35 were detected by GC-MS analyses of essential oils, 1,2- cyclohexanediol, 1-methyl-4-(1-methylethyl)-, and santolina alc., to name a few. The other four compounds were detected by LC-MS of the methanolic extracts of the rhizomes, e.g., kaempferol-3,7-O-dimethyl ether and 5,7,8-trihydroxy-2′,5′- dimethoxy-3′,4′-methylene dioxyisoflavanone. We identified and recorded the variability in the metabolite profiles of essential oils and whole rhizome extracts from the seven cultivars of Curcuma longa L. and C. aromatica Salisb. As many as 39 new metabolites were detected in these seven Indian cultivars of Curcuma spp. Many of these compounds have health benefits.

Frontiers in Pharmacology published new progress about Coloring materials. 124-76-5 belongs to class alcohols-buliding-blocks, name is rel-(1R,2R,4R)-1,7,7-Trimethylbicyclo[2.2.1]heptan-2-ol, and the molecular formula is C10H18O, COA of Formula: C10H18O.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts