Category: alcohols-buliding-blocks

Qin, Jing published the artcileStructural characterization and immunoregulatory activity of two polysaccharides from the rhizomes of Atractylodes lancea (Thunb.) DC, Safety of (2R,3S,4S,5R)-2,3,4,5,6-Pentahydroxyhexanal, the main research area is Atractylodes rhizome acidic neutral polysaccharide immunomodulator activity; Atractylodes lancea (Thunb.) DC; Immunoregulatory activity; Structure characterization.

A neutral polysaccharide (ALP-1) and an acidic polysaccharide (ALP-3) were purified from Atractylodes lancea (Thunb.) DC. ALP-1 exhibited a linear backbone composed of (2 → 1)-linked β-D-fructofuranose. The backbone of ALP-3 was elucidated as (→4)-GalAp-(1 → 3,4)-Rhap-(1→, and with branch chain substituted at O-3 position of →3,4)-Rhap-(1 →). The branch chain consists of (→3,5)-Araf-(1→, →5)-Araf-(1→), and Araf-(1→). Particularly, ALP-3 could significantly stimulate macrophage proliferation in a dose-dependent manner, and stimulate phagocytic, NO and cytokines production than ALP-1 on RAW264.7 cells. Besides, both ALP-1 and ALP-3 could activate T-cells in Peyer’s patch cells and enhance the production of colony stimulation factors. While the ALP-3 also showed better intestinal immune system modulating activity than ALP-1. The result of this study indicated that the structure diversity of polysaccharide is crucial for its bioactivity. And also provided evidence for that carbohydrate polymers in A. lancea definitely contributed to its pharmaceutical effects.

International Journal of Biological Macromolecules published new progress about Aggregated lymphoid nodule. 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, Safety of (2R,3S,4S,5R)-2,3,4,5,6-Pentahydroxyhexanal.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Shameer, Sanu published the artcileLeaf energy balance requires mitochondrial respiration and export of chloroplast NADPH in the light, Application of (S)-2-hydroxysuccinic acid, the main research area is Arabidopsis chloroplast malate mitochondrial respiration photooxidative stress light.

Key aspects of leaf mitochondrial metabolism in the light remain unresolved. For example, there is debate about the relative importance of exporting reducing equivalent from mitochondria for the peroxisomal steps of photorespiration vs. oxidation of NADH to generate ATP by oxidative phosphorylation. Here, we address this and explore energetic coupling between organelles in the light using a diel flux balance anal. model. The model included more than 600 reactions of central metabolism with full stoichiometric accounting of energy production and consumption. Different scenarios of energy availability (light intensity) and demand (source leaf vs. a growing leaf) were considered, and the model was constrained by the nonlinear relationship between light and CO2 assimilation rate. The anal. demonstrated that the chloroplast can theor. generate sufficient ATP to satisfy the energy requirements of the rest of the cell in addition to its own. However, this requires unrealistic high light use efficiency and, in practice, the availability of chloroplast-derived ATP is limited by chloroplast energy dissipation systems, such as nonphotochem. quenching, and the capacity of the chloroplast ATP export shuttles. Given these limitations, substantial mitochondrial ATP synthesis is required to fulfill cytosolic ATP requirements, with only minimal, or zero, export of mitochondrial reducing equivalent The anal. also revealed the importance of exporting reducing equivalent from chloroplasts to sustain photorespiration. Hence, the chloroplast malate valve and triose phosphate-3-phosphoglycerate shuttle are predicted to have important metabolic roles, in addition to their more commonly discussed contribution to the avoidance of photooxidative stress.

Plant Physiology published new progress about Amino acids Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 97-67-6 belongs to class alcohols-buliding-blocks, name is (S)-2-hydroxysuccinic acid, and the molecular formula is C4H6O5, Application of (S)-2-hydroxysuccinic acid.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Pereira, Goncalo C. published the artcileHexokinase II dissociation alone cannot account for changes in heart mitochondrial function, morphology and sensitivity to permeability transition pore opening following ischemia, Related Products of alcohols-buliding-blocks, the main research area is ischemia hexokinase II heart mitochondria morphol permeability transition pore.

We previously demonstrated that hexokinase II (HK2) dissociation from mitochondria during cardiac ischemia correlates with cytochrome c (cyt-c) loss, oxidative stress and subsequent reperfusion injury. However, whether HK2 release is the primary signal mediating this ischemia-induced mitochondrial dysfunction was not established. To investigate this, we studied the effects of dissociating HK2 from isolated heart mitochondria. Mitochondria isolated from Langendorff-perfused rat hearts before and after 30 min global ischemia ± ischemic preconditioning (IPC) were subject to in vitro dissociation of HK2 by incubation with glucose-6-phosphate at pH 6.3. Prior HK2 dissociation from pre- or end-ischemic heart mitochondria had no effect on their cyt-c release, respiration (± ADP) or mitochondrial permeability transition pore (mPTP) opening. Inner mitochondrial membrane morphol. was assessed indirectly by monitoring changes in light scattering (LS) and confirmed by transmission electron microscopy. Although no major ultrastructure differences were detected between pre- and end-ischemia mitochondria, the amplitude of changes in LS was reduced in the latter. This was prevented by IPC but not mimicked in vitro by HK2 dissociation We also observed more Drp1, a mitochondrial fission protein, in end-ischemia mitochondria. IPC failed to prevent this increase but did decrease mitochondrial-associated dynamin 2. In vitro HK2 dissociation alone cannot replicate ischemia-induced effects on mitochondrial function implying that in vivo dissociation of HK2 modulates end-ischemia mitochondrial function indirectly perhaps involving interaction with mitochondrial fission proteins. The resulting changes in mitochondrial morphol. and cristae structure would destabilize outer / inner membrane interactions, increase cyt-c release and enhance mPTP sensitivity to [Ca2+].

PLoS One published new progress about Breathing (animal). 97-67-6 belongs to class alcohols-buliding-blocks, name is (S)-2-hydroxysuccinic acid, and the molecular formula is C4H6O5, Related Products of alcohols-buliding-blocks.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Silva, Weliton D. published the artcile3-Hydroxyhexan-2-one and 3-Methylthiopropan-1-ol as Pheromone Candidates for the South American Cerambycid Beetles Stizocera phtisica and Chydarteres dimidiatus dimidiatus, and Six Related Species, Computed Properties of 505-10-2, the main research area is Stizocera phtisica hydroxyhexan pheromone candidate; Aggregation-sex pheromone; Coleoptera; Hydroxyketone; Longhorned beetles; Monitoring; Semiochemistry; Structural motifs; Traps.

Here, we study the pheromone chem. of two South American cerambycid beetle species, and their behavioral responses to candidate pheromone components. Adult males of Stizocera phtisica Gounelle (subfamily Cerambycinae: tribe Elaphidiini) produced a sex-specific blend of (R)-3-hydroxyhexan-2-one with lesser amounts of 3-methylthiopropan-1-ol. In field bioassays, traps baited with racemic 3-hydroxyhexan-2-one and 3-methylthiopropan-1-ol did not catch conspecific beetles, but did catch both sexes of a sympatric species, Chydarteres dimidiatus dimidiatus (F.) (Cerambycinae: Trachyderini). We found that males of this species also produce (R)-3-hydroxyhexan-2-one and 3-methylthiopropan-1-ol, and small amounts of 2-phenylethanol. Subsequent bioassays with these compounds showed that a blend of 3-hydroxyhexan-2-one and 3-methylthiopropan-1-ol constitutes the aggregation-sex pheromone of C. d. dimidiatus, with 2-phenylethanol not influencing the attraction of conspecifics. During the field bioassays, six other species in the Cerambycinae also were caught in significant numbers, including Aglaoschema ventrale (Germar) (tribe Compsocerini), congeners Chrysoprasis aurigena (Germar), Chrysoprasis linearis Bates, and an unidentified Chrysoprasis species (Dichophyiini), and Cotyclytus curvatus (Germar) and Itaclytus olivaceus (Laporte & Gory) (both Clytini), suggesting that one or more of the compounds tested are also pheromone components for these species.

Journal of Chemical Ecology published new progress about Carpophilus dimidiatus. 505-10-2 belongs to class alcohols-buliding-blocks, name is 3-(Methylthio)propan-1-ol, and the molecular formula is C4H10OS, Computed Properties of 505-10-2.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Ponomarev, A. V. published the artcileEffect of Boiling on the Radiolysis of 1-Propanol, Related Products of alcohols-buliding-blocks, the main research area is propanol radiolysis boiling.

The radiolysis of 1-propanol without heating and in a boiling state under the action of accelerated (8-MeV electrons) was investigated. At room temperature, aldehydes dominated among mol. products. Unlike γ-radiolysis, monohydric alcs. were the second most important fraction. The yields of formation of aldehydes, monohydric alcs., and diols in boiling 1-propanol were approx. equal. Boiling increased the weight fraction of products heavier than 1-propanol to 74%, whereas this fraction was 57% at room temperature As follows from the anal. of products, boiling accelerated the dissociation of radicals and radical cations and facilitated radical exchange and combinations processes. The yields of 1-propanol degradation were 10.1 ± 0.9 and 13.3 ± 0.9 mol./100 eV at room temperature and in a boiling state, resp.

High Energy Chemistry published new progress about Aldehydes Role: PRP (Properties), TEM (Technical or Engineered Material Use), USES (Uses). 584-02-1 belongs to class alcohols-buliding-blocks, name is 3-Pentanol, and the molecular formula is C5H12O, Related Products of alcohols-buliding-blocks.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Wang, Tiejun published the artcileHydrothermal conversion of biomass to higher alcohol fuels for compression ignition engine, Safety of 3-Pentanol, the main research area is alc fuel compression ignition engine biomass hydrothermal conversion.

Higher alc. (C5/C6 alc.) blended with diesel or bio-diesel is a promising alternative clean fuel for the compression ignition engine. The most important puzzle is the technol. development of biomass to higher alc. fuels. In this paper, a novel approach of hydrothermal conversion of biomass into C5/C6 higher alc. fuels was proposed. High yield of higher alc. fuels was obtained from the real biomass with the C5/C6 alc. selectivity of 77% under the mild hydrothermal conditions. The properties of the produced higher alc. fuels are similar to that of 0# diesel. The exhaust emission of compression ignition engine decreased vigorously by blending the higher alc. fuels with diesel at weight ratio of 20/80.

Energy Procedia published new progress about Bagasse. 584-02-1 belongs to class alcohols-buliding-blocks, name is 3-Pentanol, and the molecular formula is C5H12O, Safety of 3-Pentanol.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Palomo Del Barrio, Elena published the artcileNew sugar alcohols mixtures for long-term thermal energy storage applications at temperatures between 70 °C and 100 °C, Product Details of C12H24O11, the main research area is sugar alc mixture temperature thermal energy storage.

Sugar alcs. (SA) are attractive phase change materials for long-term thermal energy storage (TES) applications at low-to-medium temperatures, as i.e. solar seasonal energy storage. Most of them undergo severe undercooling, thus allowing energy storage at temperatures far below the m.p. with thermal losses reduction Besides, some of them could provide very high volumetric energy d. at affordable cost. However, sugar alcs. with high latent heat of fusion often exhibit melting temperatures above 100 °C. The objective of this work was to found out new sugar alc. eutectic mixtures that display lower temperatures without significant reduction of the latent heat. A comprehensive anal. of SA relevant properties for TES has been carried out in order to select the most appropriate single SA for mixtures anal. Sixteen SA-based binary systems have been investigated. Their corresponding phase diagrams have been exptl. and theor. established. Four eutectic mixtures with potential for long-term TES at temperature around 80 °C have been identified. They are: (1) adonitol-erythritol at 30 mol% of erythritol, with melting temperature of 87 °C and latent heat of fusion of 254 J/g; (2) arabitol-erythritol at 40 mol% of erythritol, with melting temperature of 86 °C and latent heat of fusion of 225 J/g; (3) xylitol-erythritol at 36 mol% of erythritol, with melting temperature of 82 °C and latent heat of fusion of 270 J/g; and (4) arabitol-xylitol at 56 mol% of xylitol, with melting temperature of 77 °C and latent heat of fusion of 243 J/g.

Solar Energy Materials & Solar Cells published new progress about Binary systems. 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, Product Details of C12H24O11.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Sole, Aran published the artcileStability of sugar alcohols as PCM for thermal energy storage, Recommanded Product: (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, the main research area is sugar alc phase change material thermal energy storage stability.

Sugar alcs. as phase change materials (PCM) are very promising due to their high storage capacity, safety and economic reasons. Their phase change temperatures make them suitable for medium temperature storage, which is needed for solar process heat or waste heat recovery applications. To guarantee a long PCM working lifetime they should be tested under a repeated number of freezing/melting cycles to check whether the thermophys. properties remain constant or not. The cycling stability of D-mannitol, myo-inositol and galactitol has been studied with DSC and the chem. stability with FT-IR. Myo-inositol shows a good cycling stability under the chosen measuring parameters. The cycling and chem. stability of D-mannitol up to 20 cycles can be achieved by controlling some parameters. The variable affecting it the most is the amount of oxygen in contact with it. Hence, in the storage unit this could be prevented with an inert or vacuum atm.

Solar Energy Materials & Solar Cells published new progress about Fusion enthalpy. 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, Recommanded Product: (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.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Xia, Guoqin published the artcileReversing conventional site-selectivity in C(sp3)-H bond activation, SDS of cas: 584-02-1, the main research area is directing group regioselective carbon hydrogen bond activation.

One of the core barriers to developing C-H activation reactions is the ability to distinguish between multiple C-H bonds that are nearly identical in terms of electronic properties and bond strengths. Through recognition of distance and mol. geometry, remote C(sp2)-H bonds have been selectively activated in the presence of proximate ones. Yet achieving such unconventional site selectivity with C(sp3)-H bonds remains a paramount challenge. Here we report a combination of a simple pyruvic acid-derived directing group and a 2-pyridone ligand that enables the preferential activation of the distal γ-C(sp3)-H bond over the proximate β-C(sp3)-H bonds for a wide range of alc.-derived substrates [e.g., I + Me 4-iodobenzoate → II (52%, + 23% diarylated, after esterification)]. A competition experiment between the five- and six-membered cyclopalladation step, as well as kinetic experiments, demonstrate the feasibility of using geometric strain to reverse the conventional site selectivity in C(sp3)-H activation.

Nature Chemistry published new progress about Aryl iodides Role: RCT (Reactant), RACT (Reactant or Reagent). 584-02-1 belongs to class alcohols-buliding-blocks, name is 3-Pentanol, and the molecular formula is C5H12O, SDS of cas: 584-02-1.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Li, Jin published the artcileElectrochemical Hydrogenation with Gaseous Ammonia, Formula: C4H10OS, the main research area is gaseous ammonia electrochem hydrogenation; ammonia; electrochemistry; hydrogen-storage material; hydrogenation; sustainable chemistry.

As a carbon-free and sustainable fuel, ammonia serves as high-energy-d. hydrogen-storage material. It is important to develop new reactions able to utilize ammonia as a hydrogen source directly. Herein, we report an electrochem. hydrogenation of alkenes, alkynes, and ketones using ammonia as the hydrogen source and carbon electrodes. A variety of heterocycles and functional groups, including for example sulfide, benzyl, benzyl carbamate, and allyl carbamate were well tolerated. Fast stepwise electron transfer and proton transfer processes were proposed to account for the transformation.

Angewandte Chemie, International Edition published new progress about Alkynes Role: RCT (Reactant), RACT (Reactant or Reagent) (electrochem. hydrogenation of). 505-10-2 belongs to class alcohols-buliding-blocks, name is 3-(Methylthio)propan-1-ol, and the molecular formula is C4H10OS, Formula: C4H10OS.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts