Tag: M.W=150-200

Tyagi, Kamal; Maoz, Itay; Vinokur, Yakov; Rodov, Victor; Lewinsohn, Efraim; Lichter, Amnon published the artcile< Enhancement of table grape flavor by postharvest application of monoterpenes in modified atmosphere>, Name: 3,7-Dimethylocta-1,6-dien-3-ol, the main research area is postharvest monoterpene modified atm ethanol linalool geraniol.

Consumers expect ready-to-eat grapes to have excellent quality and flavor. In practise, most table grape cultivars have a neutral flavor relying mainly on the combination of sugar and acidity due to limited levels of volatiles that impart the unique aromas. This study investigated the possibility of improving grape flavor by incubating the berries in monoterpene-enriched modified atm. The berries were sanitized by dipping in ethanol and packaged in trays sealed with plastic films of different perforation levels. The optimal conditions selected for further study were one micro-perforation per package containing 250 g berries and storage at 5°C for 2 wk. To test the possibility of improving grape flavor during storage, berries of the cultivars Flame Seedless, Adominique, 4111 and Crimson Seedless were stored in the presence of the monoterpenes linalool or geraniol. After two weeks of storage in the presence of linalool, it accumulated in the berries to levels of 551, 704 and 3273μg kg-1 in Adominique, 4111 and Crimson Seedless, resp. Application of linalool or geraniol resulted in appearance of many other monoterpenes, probably by the action of endogenous enzymes. Organoleptic preference assays indicated that berries of Adominique and 4111 stored in the presence of linalool were favored over the control berries. Overall, the results demonstrate the feasibility of using monoterpenes to enhance berry flavor during storage.

Postharvest Biology and Technology published new progress about Monoterpenes Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 78-70-6 belongs to class alcohols-buliding-blocks, and the molecular formula is C10H18O, Name: 3,7-Dimethylocta-1,6-dien-3-ol.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Sebastiana, M.; Gargallo-Garriga, A.; Sardans, J.; Perez-Trujillo, M.; Monteiro, F.; Figueiredo, A.; Maia, M.; Nascimento, R.; Silva, M. Sousa; Ferreira, A. N.; Cordeiro, C.; Marques, A. P.; Sousa, L.; Malho, R.; Penuelas, J. published the artcile< Metabolomics and transcriptomics to decipher molecular mechanisms underlying ectomycorrhizal root colonization of an oak tree>, Computed Properties of 492-62-6, the main research area is metabolomic transcriptomic decipher mol mechanism ectomycorrhizal root colonization oak.

Mycorrhizas are known to have a pos. impact on plant growth and ability to resist major biotic and abiotic stresses. However, the metabolic alterations underlying mycorrhizal symbiosis are still understudied. By using metabolomics and transcriptomics approaches, cork oak roots colonized by the ectomycorrhizal fungus Pisolithus tinctorius were compared with non-colonized roots. Results show that compounds putatively corresponding to carbohydrates, organic acids, tannins, long-chain fatty acids and monoacylglycerols, were depleted in ectomycorrhizal cork oak colonized roots. Conversely, non-proteogenic amino acids, such as gamma-aminobutyric acid (GABA), and several putative defense-related compounds, including oxylipin-family compounds, terpenoids and B6 vitamers were induced in mycorrhizal roots. Transcriptomic anal. suggests the involvement of GABA in ectomycorrhizal symbiosis through increased synthesis and inhibition of degradation in mycorrhizal roots. Results from this global metabolomics anal. suggest decreases in root metabolites which are common components of exudates, and in compounds related to root external protective layers which could facilitate plant-fungal contact and enhance symbiosis. Root metabolic pathways involved in defense against stress were induced in ectomycorrhizal roots that could be involved in a plant mechanism to avoid uncontrolled growth of the fungal symbiont in the root apoplast. Several of the identified symbiosis-specific metabolites, such as GABA, may help to understand how ectomycorrhizal fungi such as P. tinctorius benefit their host plants.

Scientific Reports published new progress about Alkaloids Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 492-62-6 belongs to class alcohols-buliding-blocks, and the molecular formula is C6H12O6, Computed Properties of 492-62-6.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Tamoradi, Taiebeh; Ghorbani-Choghamarani, Arash; Ghadermazi, Mohammad published the artcile< Synthesis of new zirconium complex supported on MCM-41 and its application as an efficient catalyst for synthesis of sulfides and the oxidation of sulfur containing compounds>, Quality Control of 699-12-7, the main research area is sulfide preparation oxidation adenine zirconium nanocatalyst green chem; thiol oxidative coupling adenine zirconium nanocatalyst green chem.

The synthesis of new zirconium complex supported on mesoporous silica by anchoring of adenine on the wall of functionalized MCM-41 and then reacted with ZrOCl2 was described. The resultant MCM-41-Adenine-Zr was characterized by FT-IR, XRD, TEM, SEM, TGA, EDX, ICP and BET techniques. It was exhibited that the MCM-41-Adenine-Zr can be used as an efficient and thermally stable nanocatalyst for the oxidation of sulfides such as dipropylsulfide, tetrahydrothiophene, benzylphenylsulfide, etc.; oxidative coupling of thiols such as naphthalene-2-thiol, benzo[d]thiazole-2-thiol, benzo[d]oxazole-2-thiol, etc. and synthesis of sulfides such as 1,1′-thiobis(2-methoxy)-benzene, 1,1′-thiobis-benzene, 1,1′-thiobis(4-nitro)-benzene. Moreover, this heterogeneous catalyst can be easily recovered from the reaction mixture by simple filtration and reused for several consecutive cycles without noticeable change in its catalytic activity.

Applied Organometallic Chemistry published new progress about Green chemistry. 699-12-7 belongs to class alcohols-buliding-blocks, and the molecular formula is C8H10OS, Quality Control of 699-12-7.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Hui, Heping; Li, Xiuzhuang; Jin, Hui; Yang, Xiaoyan; Xin, Aiyi; Zhao, Ruiming; Qin, Bo published the artcile< Structural characterization, antioxidant and antibacterial activities of two heteropolysaccharides purified from the bulbs of Lilium davidii var. unicolor Cotton>, Application In Synthesis of 3458-28-4, the main research area is Lilium bulb heteropolysaccharide antioxidant antibacterial; Antioxidant and antibacterial activity; Heteropolysaccharides; Lilium davidii var. unicolor Cotton; Structural characterization.

Two heteropolysaccharides, BHP-1 and BHP-2, were separated and purified from the edible bulbs of Lilium davidii var. unicolor Cotton by anion-exchange and gel-permeation chromatog. The primary structural characteristics of BHP-1 and BHP-2 were investigated by Congo red test, X-ray diffractometry (XRD) anal., IR, GC and NMR. The results showed that the weight-average mol. weight (MW) and number-average mol. weight (Mn) of BHP-1 and BHP-2 were nearly 1.93 × 105 g/moL, 8.86 × 104 g/moL and 3.52 × 104 g/moL, 2.95 × 104 g/moL, resp. Glucose and mannose comprised BHP-1 in a relative molar ratio of 5.9:2.0, and BHP-2 was consisted of glucose, galactose, mannose and arabinose with approx. molar ratios of 8.3:1.5:1.0:1.1. Their backbone mainly contained α-(1 → 4)-linked D-glucopyranosyl. In addition, the C-6 of the glucose and C-2 of mannose residue of BHP-1 and BHP-2 were substituted. The two polysaccharides were semi-crystalline substance with multi-branching structure and triple helix conformation. Bioassays showed that BHP-1 and BHP-2 had effective antioxidant activities evaluated by DPPH, scavenging superoxide radical and OH radical in a dose-dependent manner. The two heteropolysaccharides also displayed distinct and selective antibacterial activity against B. cereus, P. putida, M. luteus and K. pneumonia with inhibition zones of 13 mm, 16 mm, 17 mm, 23 mm and 12 mm, 17 mm, 19 mm, 20 mm, resp. These findings provided a reference for potential applications of the polysaccharides from L. davidii as natural antioxidants and antibacterial agents in food and pharmaceuticals.

International Journal of Biological Macromolecules published new progress about Anomers. 3458-28-4 belongs to class alcohols-buliding-blocks, and the molecular formula is C6H12O6, Application In Synthesis of 3458-28-4.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Minozzi, Clementine; Grenier-Petel, Jean-Christophe; Parisien-Collette, Shawn; Collins, Shawn K. published the artcile< Photocatalyic Appel reaction enabled by copper-based complexes in continuous flow>, Name: 2-(Phenylthio)ethanol, the main research area is aliphatic alc copper photocatalyst Appel reaction continuous flow; alkylbromide preparation; carboxylic acid copper catalyst photochem reaction continuous flow; anhydride preparation; Appel; continuous flow; copper; halides; photocatalysis.

A copper-based photocatalyst, Cu(tmp)(BINAP)BF4, was found to be active in a photoredox Appel-type conversion of alcs. to bromides. The catalyst was identified from a screening of 50 complexes and promoted the transformation of primary and secondary alcs. to their corresponding bromides and carboxylic acids to their anhydride. The protocol was also amendable and optimized under continuous flow conditions.

Beilstein Journal of Organic Chemistry published new progress about Aliphatic alcohols Role: RCT (Reactant), SPN (Synthetic Preparation), RACT (Reactant or Reagent), PREP (Preparation). 699-12-7 belongs to class alcohols-buliding-blocks, and the molecular formula is C8H10OS, Name: 2-(Phenylthio)ethanol.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Wang, Yirui; Han, Shaowei; Li, Ruofei; Cui, Baosong; Ma, Xianjie; Qi, Xinzhu; Hou, Qi; Lin, Mingbao; Bai, Jinye; Li, Shuai published the artcile< Structural characterization and immunological activity of polysaccharides from the tuber of Bletilla striata>, Safety of (2S,3S,4R,5R)-2,3,4,5,6-Pentahydroxyhexanal, the main research area is Bletilla tuber thymus spleen polysaccharide structural property immunol.

Two water-soluble polysaccharides, BSP-1 and BSP-2, were extracted and purified from the tuber of Bletilla striata. The mol. weights of BSP-1 and BSP-2 were 83.54 kDa and 12.60 kDa, resp. The composition and proportion of BSP-1 and BSP-2 were mannose and glucose in molar ratios of 4.0:1.0 and 3.0:1.0 resp. The two polysaccharides had a linear backbone, consisting mainly of repeating β-1,4-linked D-mannosyl residues and β-1,4-linked D-glucosyl residues. BSP-1 exhibited immunomodulatory effects by increasing the thymus and spleen indexes of immunocompromised model mice.

International Journal of Biological Macromolecules published new progress about Bletilla striata. 3458-28-4 belongs to class alcohols-buliding-blocks, and the molecular formula is C6H12O6, Safety of (2S,3S,4R,5R)-2,3,4,5,6-Pentahydroxyhexanal.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

He, Jun; Fandino, Richard A.; Halitschke, Rayko; Luck, Katrin; Kollner, Tobias G.; Murdock, H. Murdock; Ray, Rishav; Gase, Klaus; Knaden, Markus; Baldwin, Ian T.; Schuman, Meredith C. published the artcile< An unbiased approach elucidates variation in (S)-(+)-linalool, a context-specific mediator of a tri-trophic interaction in wild tobacco>, SDS of cas: 78-70-6, the main research area is linalool synthase gene variation tobacco herbivore Manduca oviposition; Manduca sexta; Nicotiana attenuata; enantiomer-specific linalool synthase; oviposition preference; tri-trophic interactions.

Plant volatile organic compounds (VOCs) mediate many interactions, and the function of common VOCs is especially likely to depend on ecol. context. We used a genetic mapping population of wild tobacco, Nicotiana attenuata, originating from a cross of 2 natural accessions from Arizona and Utah, separated by the Grand Canyon, to dissect genetic variation controlling VOCs. Herbivory-induced leaf terpenoid emissions varied substantially, while green leaf volatile emissions were similar. In a field experiment, only emissions of linalool, a common VOC, correlated significantly with predation of the herbivore Manduca sexta by native predators. Using quant. trait locus mapping and genome mining, we identified an (S)-(+)-linalool synthase (NaLIS). Genome resequencing, gene cloning, and activity assays revealed that the presence/absence of a 766-bp sequence in NaLIS underlies the variation of linalool emissions in 26 natural accessions. We manipulated linalool emissions and composition by ectopically expressing linalool synthases for both enantiomers, (S)-(+)- and (R)-(-)-linalool, reported to oppositely affect M. sexta oviposition, in the Arizona and Utah accessions. We used these lines to test ovipositing moths in increasingly complex environments. The enantiomers had opposite effects on oviposition preference, but the magnitude of the effect depended strongly both on plant genetic background, and complexity of the bioassay environment. Our study reveals that the emission of linalool, a common VOC, differs by orders-of-magnitude among geog. interspersed conspecific plants due to allelic variation in a linalool synthase, and that the response of a specialist herbivore to linalool depends on enantiomer, plant genotype, and environmental complexity.

Proceedings of the National Academy of Sciences of the United States of America published new progress about Alleles (of linalool synthase genes). 78-70-6 belongs to class alcohols-buliding-blocks, and the molecular formula is C10H18O, SDS of cas: 78-70-6.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Seabright, Gemma E.; Cottrell, Christopher A.; van Gils, Marit J.; D′addabbo, Alessio; Harvey, David J.; Behrens, Anna-Janina; Allen, Joel D.; Watanabe, Yasunori; Scaringi, Nicole; Polveroni, Thomas M.; Maker, Allison; Vasiljevic, Snezana; de Val, Natalia; Sanders, Rogier W.; Ward, Andrew B.; Crispin, Max published the artcile< Networks of HIV-1 Envelope Glycans Maintain Antibody Epitopes in the Face of Glycan Additions and Deletions>, Application In Synthesis of 3458-28-4, the main research area is glycan neutralizing antibody epitope HIV1; broadly neutralizing antibodies; cryo-electron microscopy; glycans; glycosylation; human immunodeficiency virus; mass spectrometry; structure; vaccines.

Numerous broadly neutralizing antibodies (bnAbs) have been identified that target the glycans of the HIV-1 envelope spike. Neutralization breadth is notable given that glycan processing can be substantially influenced by the presence or absence of neighboring glycans. Here, using a stabilized recombinant envelope trimer, we investigate the degree to which mutations in the glycan network surrounding an epitope impact the fine glycan processing of antibody targets. Using cryo-electron microscopy and site-specific glycan anal., we reveal the importance of glycans in the formation of the 2G12 bnAb epitope and show that the epitope is only subtly impacted by variations in the glycan network. In contrast, we show that the PG9 and PG16 glycan-based epitopes at the trimer apex are dependent on the presence of the highly conserved surrounding glycans. Glycan networks underpin the conservation of bnAb epitopes and are an important parameter in immunogen design.

Structure (Oxford, United Kingdom) published new progress about Epitopes. 3458-28-4 belongs to class alcohols-buliding-blocks, and the molecular formula is C6H12O6, Application In Synthesis of 3458-28-4.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Wang, Chung-Yi; Chen, Yu-Wei; Hou, Chih-Yao published the artcile< Antioxidant and antibacterial activity of seven predominant terpenoids>, Recommanded Product: 3,7-Dimethylocta-1,6-dien-3-ol, the main research area is limonene myrcene linalool antioxidant antibacterial activity Staphylococcus Salmonella Escherichia.

This study aimed to determine the efficacy of seven predominant wine terpenoids (i.e. α-pinene, limonene, myrcene, geraniol, linalool, nerol, and terpineol) against foodborne pathogenic bacteria, as well as to observe their antioxidant activities. Antibacterial activities were observed against foodborne pathogenic bacteria. MIC50 and MBC values for Escherichia coli, Salmonella enterica, and Staphylococcus aureus were in the ranges of 0.420-1.598 mg/mL and 0.673-3.432 mg/mL, resp. The terpenoid α-pinene showed the strongest DPPH free radical scavenging (IC50 value = 12.57 ± 0.18 mg/mL) and the highest reducing power (213.7 ± 5.27 μg/mL of L-ascorbic acid equivalent). However, the DPPH free radical scavenging of the terpenoids was found to be lower than that of butylated hydroxytoluene, which is known to be a strong reducing agent. The seven predominant terpenoids in wines that were identified in this study could be new potential sources of natural antibacterial and antioxidant agents for use in the food industry.

International Journal of Food Properties published new progress about Antibacterial agents. 78-70-6 belongs to class alcohols-buliding-blocks, and the molecular formula is C10H18O, Recommanded Product: 3,7-Dimethylocta-1,6-dien-3-ol.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Mudududdla, Ramesh; Jain, Shreyans K.; Bharate, Jaideep B.; Gupta, Ajai P.; Singh, Baldev; Vishwakarma, Ram A.; Bharate, Sandip B. published the artcile< ortho-Amidoalkylation of phenols via tandem one-pot approach involving oxazine intermediate>, Quality Control of 4396-13-8, the main research area is hydroxybenzyl lactam regioselective preparation; phenol lactam tandem Knoevenagel condensation Diels Alder cycloaddition; perchloric acid amidoalkylation catalyst.

An efficient method for ortho-amidoalkylation of phenols via Mannich-type condensation with formaldehyde and lactams using recyclable solid acid catalyst is described. This is the first report for ortho-amidoalkylation of phenols by lactams via Mannich-type condensation. LC-ESI-MS/MS based mechanistic study revealed that reaction proceeds through o-quinone methide (o-QM) and an oxazine intermediate via tandem Knoevenagel condensation, formal [4 + 2]-Diels-Alder cycloaddition and acid catalyzed oxazine ring-opening.

Journal of Organic Chemistry published new progress about Amidoalkylation. 4396-13-8 belongs to class alcohols-buliding-blocks, and the molecular formula is C8H6O5, Quality Control of 4396-13-8.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts