Month: December 2022

Shaikh, Kashif Mohd published the artcileMolecular profiling of an oleaginous trebouxiophycean alga Parachlorella kessleri subjected to nutrient deprivation for enhanced biofuel production, Application of rel-(1R,2R,4R)-1,7,7-Trimethylbicyclo[2.2.1]heptan-2-ol, the main research area is Parachlorella biofuel lipid metabolism photosynthesis; Biofuels; Metabolomics; Microalgae; Nutrient deprivation; Parachlorella kessleri.

Background: Decreasing fossil fuels and its impact on global warming have led to an increasing demand for its replacement by sustainable renewable biofuels. Microalgae may offer a potential feedstock for renewable biofuels capable of converting atm. CO2 to substantial biomass and valuable biofuels, which is of great importance for the food and energy industries. Parachlorella kessleri, a marine unicellular green alga belonging to class Trebouxiophyceae, accumulates large amount of lipids under nutrient-deprived conditions. The present study aims to understand the metabolic imprints in order to elucidate the physiol. mechanisms of lipid accumulations in this microalga under nutrient deprivation. Results: Mol. profiles were obtained using gas chromatog.-mass spectrometry (GC-MS) of P. kessleri subjected to nutrient deprivation. Relative quantities of more than 60 metabolites were systematically compared in all the three starvation conditions. Our results demonstrate that in lipid metabolism, the quantities of neutral lipids increased significantly followed by the decrease in other metabolites involved in photosynthesis, and nitrogen assimilation. Nitrogen starvation seems to trigger the triacylglycerol (TAG) accumulation rapidly, while the microalga seems to tolerate phosphorous limitation, hence increasing both biomass and lipid content. The metabolomic and lipidomic profiles have identified a few common metabolites such as citric acid and 2-ketoglutaric acid which play significant role in diverting flux towards acetyl-CoA leading to accumulation of neutral lipids, whereas other mols. such as trehalose involve in cell growth regulation, when subjected to nutrient deprivation. Conclusions: Understanding the entire system through qual. (untargeted) metabolome approach in P. kessleri has led to identification of relevant metabolites involved in the biosynthesis and degradation of precursor mols. that may have potential for biofuel production, aiming towards the vision of tomorrow’s bioenergy needs.

Biotechnology for Biofuels published new progress about Biofuels. 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, Application of rel-(1R,2R,4R)-1,7,7-Trimethylbicyclo[2.2.1]heptan-2-ol.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Miranda, Bruna M. published the artcileA galactose-rich heteropolysaccharide extracted from “”jaboticaba”” (Plinia cauliflora) peels, Category: alcohols-buliding-blocks, the main research area is jaboticaba Plinia cauliflora galactose; Arabinogalactan; GC/MS chromatography; Relative viscosity; Rheology.

The objective of this work was to extract, identify and characterize a galactose-rich heteropolysaccharide (GH) from “”jaboticaba”” peel. The best conditions to extract the GH according to a 23 full-factorial expremental design were 90°C/30 min/pH 1.0, resulting in a 32.32% yield using lyophilized sample. The chem. structure analyzed by GC/MS and NMR spectra (HSQC/HSQC-TOCSY) showed that the main chain of GH consists of a (1→4) galactoside branched at carbon 3, containing galactose (67.21%), glucose (15.78%), arabinose (9.78%), rhamnose (2.26%) and traces of esterified and non-esterified uronic acids. Rheol studies revealed that GH suspensions behave as a Newtonian fluid, with calculated mol. mass of 1.48 x 105 Da. The abstract viscosity of 1% (w/v) aq suspension of GH decreased from 25 mPa s to 10 mPa s in NaCl and 7 mPa s in CaCl2, indicating the polyelectrolyte character of GH.

Carbohydrate Polymers published new progress about Behavior. 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, Category: alcohols-buliding-blocks.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Lindsay, Angus published the artcileSensitivity to behavioral stress impacts disease pathogenesis in dystrophin-deficient mice, HPLC of Formula: 97-67-6, the main research area is behavioral stress mutation phenotype dystrophin; blood pressure; dystrophin; estrogen; hypothalamic pituitary adrenal axis; skeletal muscle.

Mutation to the gene encoding dystrophin can cause Duchenne muscular dystrophy (DMD) and increase the sensitivity to stress in vertebrate species, including the mdx mouse model of DMD. Behavioral stressors can exacerbate some dystrophinopathy phenotypes of mdx skeletal muscle and cause hypotension-induced death. However, we have discovered that a subpopulation of mdx mice present with a wildtype-like response to mild (forced downhill treadmill exercise) and moderate (scruff restraint) behavioral stressors. These stress-resistant mdx mice are more phys. active, capable of super-activating the hypothalamic-pituitary-adrenal and renin-angiotensin-aldosterone pathways following behavioral stress and they express greater levels of mineralocorticoid and glucocorticoid receptors in striated muscle relative to stress-sensitive mdx mice. Stress-resistant mdx mice also presented with a less severe striated muscle histopathol. and greater exercise and skeletal muscle oxidative capacity at rest. Most interestingly, female mdx mice were more phys. active following behavioral stressors compared to male mdx mice; a response abolished after ovariectomy and rescued with estradiol. We demonstrate that the response to behavioral stress greatly impacts disease severity in mdx mice suggesting the management of stress in patients with DMD be considered as a therapeutic approach to ameliorate disease progression.

FASEB Journal published new progress about Behavior. 97-67-6 belongs to class alcohols-buliding-blocks, name is (S)-2-hydroxysuccinic acid, and the molecular formula is C4H6O5, HPLC of Formula: 97-67-6.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Tagiuri, Ali published the artcileDissociation Constant (pKa) and Thermodynamic Properties of Some Tertiary and Cyclic Amines from (298 to 333) K, Computed Properties of 2212-32-0, the main research area is dissociation constant thermodn property tertiary cyclic amine.

The potentiometric titration method was used to measure pKa values of nine amines [2-(diisopropylamino)ethanol [2-DIPA], N,N,N’,N’-tetrakis(2-hydroxypropyl)ethylenediamine [THPEDA], 2-{[2-(dimethylamino) ethyl]methyl amino} ethanol [2-DMAEMAE], tris[2-(2-methoxyethoxy)ethyl]amine [TMEEA], N-(2-hydroxyethyl) aniline [2-HEAN], 1-(2-hydroxyethyl)piperazine [HEP], piperazine [PZ], monoethanolamine [MEA], and N-methyldiethanolamine [MDEA] at (298.15, 303.15, 313.15, 323.15, and 333.15) K. pKa values of the last three amines were compared with published data to validate the procedure and assess the accuracy of the instrument. Thermodn. quantities, such as standard enthalpy (ΔH°·kJ-1·mol-1) and entropy (ΔSo·kJ-1·mol-1) for the dissociation process, were determined at 298.15 K using the van’t Hoff equation. From the exptl. results, the values of the standard state thermodn. properties were derived and compared to the values of com. available amines used as absorbents for CO2 capture. Among the studied amines, 2-DMAEMAE was identified as having a high pKa (9.18) and lower heat of dissociation than MEA (27.77 kJ/mol, as compared to 48.59 kJ/mol for MEA) and can therefore be considered a potential candidate for CO2 capture applications.

Journal of Chemical & Engineering Data published new progress about Basicity. 2212-32-0 belongs to class alcohols-buliding-blocks, name is N2-(2-Hydroxyethyl)-N1,N1,N2-trimethyl-1,2-ethylenediamine, and the molecular formula is C7H18N2O, Computed Properties of 2212-32-0.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Vasanthi, T. published the artcileExperimental observation of induced thermochromic effect and nematic defects in hydrogen bonded liquid crystals, Application of 2,2′-Oxydiacetic acid, the main research area is hydrogen bond crystal temperature band gap energy.

Hydrogen bonded liquid crystal mixtures are derived from: (i) non-mesogenic compounds of diglycolic acid (DGA), (ii) mesogenic compounds of 4-amyloxybenzoic acid (5OBA) and (iii) 4-hexyloxy benzoic acid (6OBA). The existence of intermol. H-bond is confirmed with FTIR and validated using the d. functional theory studies. Polarized light microscopy and differential scanning calorimetry are used to observe the phase variations and transition temperature In addition, enthalpy values of different mesogenic phases are determined It is worth mentioning that the nematic mesogenic defects with S = ±1 and S = +1/2 are also analyzed. In order to discuss the induced higher order smectic F phase and its stability, the d. functional theory study is applied. The band gap energy of the hydrogen bonded liquid crystal mixtures is found to be 5.1780 eV, based on the HUMO-LUMO approach. This induced thermochromic effect of hydrogen bonded liquid crystal mixtures is a useful phenomenon that can be utilized in optical device applications. In this paper, variation on liquid crystal parameters as well as the formation of H-bond between an acceptor and a donor, along with the extension of a chain length, are also reported.

Acta Physica Polonica A published new progress about Band gap. 110-99-6 belongs to class alcohols-buliding-blocks, name is 2,2′-Oxydiacetic acid, and the molecular formula is C4H6O5, Application of 2,2′-Oxydiacetic acid.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Zhang, Daquan published the artcileInhibition effect and theoretical investigation of dicarboxylic acid derivatives as corrosion inhibitor for aluminium alloy, SDS of cas: 97-67-6, the main research area is AA5052 alloy aspartic malic acid corrosionn inhibitor.

The corrosion inhibition ability of L-malic acid (MaA) and L-aspartate acid (AsA) against corrosion of the AA5052 alloy in 4 M sodium hydroxide-ethylene glycol solution is investigated. The presence of MaA and AsA in corrosion solution shows a remarkable inhibition of hydrogen evolution of the AA5052 alloy. AsA has the better inhibition effect for the self-corrosion of the AA5052 alloy and its max protection efficiency is 82.1%. This shows that the Mulliken charges of the nitrogen atom of the amine group on the AsA is lower than the Mulliken charge of the oxygen atom of the hydroxyl group on the MaA; the total Mulliken charge of AsA is lower than MaA, and AsA has a higher EHOMO and a lower energy gap, ΔN. The amine group and carboxyl group on the AsA is easier to coordinate with Al3+ ions to form a stable complex.

Materials and Corrosion published new progress about Band gap. 97-67-6 belongs to class alcohols-buliding-blocks, name is (S)-2-hydroxysuccinic acid, and the molecular formula is C4H6O5, SDS of cas: 97-67-6.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Shen, Zhongjing published the artcileFabrication of hollow cube dual-semiconductor Ln2O3/MnO/C nanocomposites with excellent microwave absorption performance, SDS of cas: 110-99-6, the main research area is lanthanide oxide carbon manganese semiconductor nanocomposite microwave absorption; 3d-4f metal−organic frameworks; band gap; dual-semiconductor; hollow structure; microwave absorption.

Metal-organic frameworks (MOFs) have been verified as ideal precursors for preparing highly effective microwave absorbers. However, it is still challenging to fabricate a thin, lightweight, and well-organized nanostructure with strong microwave absorption (MA) capability and wide absorption bandwidth. In this study, hollow cube dual-semiconductor Ln2O3/MnO/C (Ln = Nd, Gd, Er) nanocomposites, which are effective microwave absorbers, have been fabricated via one-step high-temperature carbonization of Ln-Mn-MOFs. The effect of band gap on the MA performance of various nanocomposites synthesized at the same carbonization temperature is investigated. Gd2O3/MnO/C-800 shows superior MA capacity with maximum reflection loss (RLmax) of -64.4 dB at 12.8 GHz and 1.86 mm-thickness. When the thickness is 1.44 mm, the RL value is obtained as -52.7 dB at 16.8 GHz, and at a low frequency of 4.36 GHz and thickness of 4.59 mm, the RL value reaches -56.4 dB. Further, the effect of temperature on the MA properties of Gd2O3/MnO/C is examined The results reveal that Gd2O3/MnO/C-700 has an ultrahigh MA bandwidth of 6.6 GHz, covering the entire Ku bands at 2.09 mm-thickness. Overall, this work demonstrates a facile strategy to construct hollow, homogeneous ternary composites with outstanding MA performance.

ACS Applied Materials & Interfaces published new progress about Band gap. 110-99-6 belongs to class alcohols-buliding-blocks, name is 2,2′-Oxydiacetic acid, and the molecular formula is C4H6O5, SDS of cas: 110-99-6.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Wang, Chao published the artcileRobust hydrogen production via pickering interfacial catalytic photoreforming of n-octanol-water biphasic system, COA of Formula: C8H18O, the main research area is hydrogen production octanol water pickering interfacial catalysis; Pt/TiO2 nanosheets; hydrogen production; microfluidics; photoreforming; pickering interfacial catalysis.

Pickerin g emu lsion offers a promis ing platform for conductin g interfa cial reaction s bet ween immis cible reagents ; it is part icularly suit able for hy drogen producti on by photo reforming of non-w ater soluble biomass liq uid and w ater. Here in, Pt-p romoted (001)-fa cet-domi nated anatase TiO2 nanosheets were synthesized by a hydrothermal route associated with microfluidic technol. for high activity and metal dispersion, and selective surface modification was carried out for preparing Janus particles. Photoreforming hydrogen production through n-octanol and water that formed O/W microemulsion with an average diameter of 540μm was achieved to obtain amphiphilic catalyst. The as-prepared 2D Janus-type catalysts exhibited remarkably stable emulsification performance as well as photocatalytic activity. This finding indicates that triethoxyfluorosilane had negligible impact on the catalytic performance, yet provided a remarkable benefit to large sp. surface area at microemulsion interface, thereby enhancing the H2 yield up to 2003μmol/g. The cyclic experiments indicate that the decrease in cyclic performance was more likely to be caused by the coalescence of the microemulsion rather than the decrease in catalytic activity, and the microemulsion could be easily recovered by simply hand shaking to more than 96% of the initial performance.

Frontiers in Chemistry (Lausanne, Switzerland) published new progress about Band gap. 111-87-5 belongs to class alcohols-buliding-blocks, name is n-Octanol, and the molecular formula is C8H18O, COA of Formula: C8H18O.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Qi, Yong published the artcileRotational Periodicity Display of the Tunable Wettability Pattern in a Photoswitch Based on a Response Bilayer Photonic Crystal, Application of Pentaerythritol tetra(3-mercaptopropionate), the main research area is optical prism warning board anticounterfeiting steganog watermarking complex; bilayer photonic crystal; period; photoswitch; rotation; wettability.

Although the forward diffraction of the three-dimensional (3D) photonic crystal is easily applied to a photoswitch, backward diffraction rainbows are rarely reported. The first rotational photoswitch based on a bilayer 3D photonic crystal with backward diffractions similar to those of two-dimensional photonic crystals was fabricated by vertically combining different thicknesses of nanoparticle templates. When rotating the bilayer photonic crystal, the opening or closing of the rotational photoswitch shows periodic reproducibility values of 30 and 60°. Different periods are regulated by the thickness and scattering effect of the top layer. Moreover, invisible patterns can be encoded and erased by changing the wettability via pH. Because of the decreasing of the refractive index differentials, it will be revealed rapidly when immersed in water. The revealed pattern can be periodically turned on and off by rotating the bilayer photonic crystal. It has great application prospects in optical prism, warning board, anti-counterfeiting, steganog., watermarking, and complex information coding.

ACS Applied Materials & Interfaces published new progress about Band gap. 7575-23-7 belongs to class alcohols-buliding-blocks, name is Pentaerythritol tetra(3-mercaptopropionate), and the molecular formula is C17H28O8S4, Application of Pentaerythritol tetra(3-mercaptopropionate).

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Lin, Shifan published the artcileStudy on the Effect of Mentha x piperita L. Essential Oil on Electroencephalography upon Stimulation with Different Visual Effects, Category: alcohols-buliding-blocks, the main research area is Mentha piperita essential oil electroencephalog stimulation visual effect; colour; electroencephalograph; inhalation; peppermint essential oil.

Essential oils have long been used to fight infections and treat various diseases. Peppermint (Mentha x piperita L.) is an herbal medicine that has been widely used in daily life since ancient times, and it has a wide range of applications in food, cosmetics, and medicine. Mint oil is refreshing because of its cool and comfortable smell; therefore, it is often used in ethnopharmacol. studies. The present study investigated the effects of peppermint essential oil in electroencephalog. activity response to various visual stimuli. The electroencephalog. changes of participants during peppermint essential oil inhalation under white, red, and blue color stimulations were recorded. A rapid Fourier transform anal. was used to examine the electroencephalograph power spectra of the various microstates induced by inhaling the oils. Peppermint essential oil had various effects on the brain when subjected to different visual stimuli. Alpha waves increased in the prefrontal area in the white-sniffing group, which facilitated learning and thinking. In the blue-sniffing group, the changes were less pronounced than those in the red group, and the increased alpha wave activity in the occipital area was more controlled, indicating that the participants’ visual function increased in this state. Based on EEG investigations, this is the first study to indicate that vision influences the effects of peppermint essential oils. Hence, the results of this study support the use of essential oils in a broader context to serve as a resource for future studies on the effects of different types of essential oils.

Molecules published new progress about Ayurveda. 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, Category: alcohols-buliding-blocks.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts