Tag: M.W=100-150

Ribeiro, Adriana Santos published the artcileSynthesis of (R)-(-) and (S)-(+)-3-(1-pyrrolyl)propyl N-(3,5-dinitrobenzoyl)-α-phenylglycinate and derivatives. A suitable chiral polymeric phase precursor, Application of 3-(1H-Pyrrol-1-yl)propan-1-ol, the main research area is phenylglycine N dinitrobenzoyl derivative enantiomeric preparation; pyrrolylpropyl dinitrobenzoylphenylglycinate preparation precursor polymeric film.

A synthetic route to obtain 3-(1-pyrrolyl)propyl (R)- and (S)-N-(3,5-dinitrobenzoyl)-α-phenylglycinate (1, 2) and derivatives is described. In a first step, pyrrole derivatives were prepared using the Clauson-Kaas method. The esterification, second step, was performed using basic conditions due to sensitivity of the pyrrole group toward acidic conditions. A tautomeric equilibrium involving the stereogenic center induces the product epimerization. The substitution of DMAP and Et3N by a highly hindered base, proton-sponge, furnished the final products without racemization. The enantiomeric excess of 1, 2 and of the corresponding Me esters (3 and 4) were determined by 1H NMR anal. in the presence of optically active Eu(tfc)3. Epimerization was not observed in the preparation of the amine salts of (R)- and (S)-N-(3,5-dinitrobenzoyl)-α-phenylglycine with triethylamine and 1-[3-(dimethylamino)propyl]pyrrole.

Tetrahedron: Asymmetry published new progress about Esterification. 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, Application of 3-(1H-Pyrrol-1-yl)propan-1-ol.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Anzano, Jesus M. published the artcileChemistry practices for undergraduate students: plastic polymers characterization by gas chromatography, Safety of n-Octanol, the main research area is polymer plastic property gas chromatog.

The present study deals with the chem.-anal. characterization of plastics, specifically anal. determination of phthalates in polyvinyl chloride (PVC) and the quantification of residual styrene (S) monomer in plastic polystyrene (PS); both polymers are commonly used in food packaging. In determining phthalates, the method’s principle used, is the precipitation of the PVC polymer followed by hydrolysis of the plasticizers and the leaching of the alc. obtained in an organic phase. To study the efficiency of the reaction, dioctyl phthalate (DOP) has been used as a standard In determining S, the method used, is based on the total sample-plastic dissolution followed by the precipitation of the PS leaving behind the monomer. It does not include dilution methods. In both tests, the quant. determination is made by gas chromatog. (GC).

Journal of Laboratory Chemical Education published new progress about Food packaging. 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

El-Seesy, Ahmed I. published the artcileImpacts of octanol and decanol addition on the solubility of methanol/hydrous methanol/diesel/biodiesel/Jet A-1 fuel ternary mixtures, COA of Formula: C8H18O, the main research area is octanol decanol hydrous methanol diesel biodiesel jetA1 fuel solubility.

This study attempts to enhance the mixture instability of methanol/hydrous methanol mixed with diesel fuel, waste cooking oil (WCO) biodiesel, and Jet A-1 fuel using n-octanol and n-decanol as cosolvent at numerous temperatures of 10°C, 20°C, and 30°C. The experiment is divided into two stages: first, blending pure methanol with diesel oil, Jet A-1, and WCO biodiesel individually utilizing n-octanol and n-decanol as cosolvent at various temperatures Second, combining hydrous methanol (90% methanol + 10 wt% water) with diesel oil, Jet A-1, and WCO biodiesel independently and applying n-octanol and n-decanol as cosolvent at different temperatures Pure methanol or hydrous methanol is mixed with the base fuels at different mixing proportions varying from 0 to 100 vol% with 10 vol% increments. The co-solvent, mainly n-octanol and n-decanol (titrant), is progressively and sep. inserted into the tube with continuous shaking by utilizing a high-precision pipet until the ternary mixtures’ phase borders seem. The findings demonstrate phase separation in pure methanol-diesel and pure methanol-Jet A-1 combinations even when the blend temperature increased to 60°C. The pure methanol/biodiesel combination proves complete solubility without adding an external agent. The results also illustrate that the ambient temperature considerably affects the stability of mixture and amount of cosolvent in the blend. n-Octanol and n-decanol showed promising performance in enhancing the phase stability issue of methanol and hydrous methanol with the base fuels. It can be deduced that the min. amount of cosolvent is recorded for biodiesel-hydrous methanol, Jet A-1-hydrous methanol, and diesel-hydrous methanol, resp.

RSC Advances published new progress about Biodiesel fuel. 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

Zhang, Hao published the artcileThe enhanced mechanisms of Hansschlegelia zhihuaiae S113 degrading bensulfuron-methyl in maize rhizosphere by three organic acids in root exudates, Name: (S)-2-hydroxysuccinic acid, the main research area is bensulfuronmethyl degradation organic acid root exudate maize rhizosphere Hansschlegelia; Bensulfuron-methyl; Chemotactic response; Hansschlegelia zhihuaiae S113; Maize rhizosphere; Organic acids.

The residues of bensulfuron-Me (BSM), a sulfonylurea herbicide, in soil have caused serious damage to the rotation of susceptible crops. Many studies have reported that the removal of BSM in soil was achieved by adding degrading bacteria. However, the mechanisms used by bacteria to degrade BSM in the crop rhizosphere remain unclear. In this study, a BSM-degrading bacterium, Hansschlegelia zhihuaiae S113, was applied to investigate the enhancement of effects mediated by organic acids during the bioremediation of BSM-contaminated maize rhizosphere soil. Organic acids, such as -malic acid, tartaric acid, and fumaric acid, identified in maize root exudates, significantly stimulated the expression of cheA, which encoded the histidine kinase in strain S113 and contributed to the chemotactic response. This process accelerated the accumulation of strain S113 around the maize roots and promoted the colonization process on maize roots. The growth of strain S113 was significantly increased by -malic acid but not tartaric acid or fumaric acid. After the S113 suspension was root-irrigated to BSM-contaminated soil, the d. of strain S113 colonizing root surfaces and in rhizosphere soil reached 1.1 x 104 cells/g for roots and 4.9 x 104 cells/g in dry soil at 15 d, leading to 80.9% BSM degradation efficiency. The treatment with the addition of a mixture of S113 and -malic acid completely degraded BSM in rhizosphere soil due to the strong attraction and growth promotion of strain S113 by -malic acid, with a higher efficiency than that with the extra addition of fumaric acid (89.7%) or tartaric acid (87.0%). This paper revealed the enhancement effects of organic acids identified in root exudates for the in situ bioremediation of BSM-contaminated rhizosphere soil.

Ecotoxicology and Environmental Safety published new progress about Bioremediation. 97-67-6 belongs to class alcohols-buliding-blocks, name is (S)-2-hydroxysuccinic acid, and the molecular formula is C4H6O5, Name: (S)-2-hydroxysuccinic acid.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Hosseiny Davarani, Saied Saeed published the artcileQuantification of controlled release leuprolide and triptorelin in rabbit plasma using electromembrane extraction coupled with HPLC-UV, Formula: C8H18O, the main research area is HPLC UV plasma determination controlled release leuprolide triptorelin pharmacokinetics; electromembrane extraction HPLC controlled release leuprolide triptorelin; Electromembrane extraction; Leuprolide; Pharmacokinetic; Rabbit plasma; Triptorelin.

An electromembrane extraction followed by HPLC-UV technique was developed and validated for quantification of leuprolide and triptorelin in rabbit plasma. The influencing parameters on the extraction efficiency were optimized using exptl. design methodol. The optimized conditions were found to be; supported liquid membrane: a mixture of 1-octanol and 2-Et hexanol (1:1) containing 10% volume/volume di(2-ethylhexyl) phosphate, applied voltage: 5 V, extraction time: 5 min, pH of the donor phase: 4.5 and pH of the acceptor phase: 1.0. The optimized method was validated for linearity, intraday and interday precision, and accuracy in rabbit plasma. The range of quantification for both peptides was 0.5-1000 ng/mL with regression coefficients higher than 0.994. Relative recoveries of leuprolide and triptorelin were found to be 80.3 and 75.5%, resp. Limits of quantification and detection for both peptides were found to be 0.5 and 0.15 ng/mL, resp. The validated method was successfully applied to pharmacokinetic study of the 1-mo depot formulations of each peptide after s.c. administration to rabbits.

Electrophoresis published new progress about Blood analysis. 111-87-5 belongs to class alcohols-buliding-blocks, name is n-Octanol, and the molecular formula is C8H18O, Formula: C8H18O.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Fashi, Armin published the artcileAn analytical strategy based on the combination of ultrasound assisted flat membrane liquid phase microextraction and a smartphone reader for trace determination of malondialdehyde, Name: n-Octanol, the main research area is ultrasound assisted flat membrane liquid phase microextraction malondialdehyde; Biological samples; Derivatization; Membrane extraction; Preconcentration; RGB analysis; Sugaring out.

A new cleanup process entitled ultrasonic assisted flat membrane liquid phase microextraction (UA-FM-LPME) was introduced. The UA-FM-LPME procedure in two phase format was applied for the extraction-preconcentration of malondialdehyde (MDA) as an analyte model from the biol. samples after a derivatization reaction. In the designed extraction setup, the simultaneous use of two flat sheet membranes and the application of ultrasonic radiation provided the efficient mass transfer of MDA into the acceptor phase in a short extraction time (2 min). The collected organic phase was then analyzed through Red-Green-Blue (RGB) image anal. and HPLC coupled with UV-visible spectroscopy (HPLC-UV/visible) as detection methods. The key parameters affecting the extraction process were studied and optimized. The effect of the sugaring out on the partition of MDA into the extraction phase was examined for the first time. Under optimal conditions, linearity was observed in the concentration range of 8-1000 ng mL-1 for HPLC, and 10-1000 ng mL-1 for RGB anal., with the coefficient of determination (R2) values >0.9973. The introduced method also offered satisfactory relative standard deviations (RSDs) <4.0%. In order to examine the reliability of the technique in complicated matrixes, three different biol. samples (urine, saliva and blood plasma) were analyzed and the acceptable results in terms of relative recoveries (89.7-102.4%) were obtained. The designed setup in combination with RGB anal. will provide a low-cost alternative technique for rapid determination of MDA in clin. diagnosis or biochem. anal. without the need to complex, time consuming and expensive anal. instruments. Talanta published new progress about Blood analysis. 111-87-5 belongs to class alcohols-buliding-blocks, name is n-Octanol, and the molecular formula is C8H18O, Name: n-Octanol.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Yuvali, Donay published the artcileAn environment-friendly and rapid liquid-liquid microextraction based on new synthesized hydrophobic deep eutectic solvent for separation and preconcentration of erythrosine (E127) in biological and pharmaceutical samples, Product Details of C8H18O, the main research area is liquid microextraction hydrophobic deep eutectic solvent erythrosine; Blood; Deep eutectic solvent; Erythrosine; Liquid-liquid microextraction; Pharmaceutical samples; Urine.

A new deep eutectic solvent (DES) consist of tetrabuthylammonium bromide (TBABr) and 1-octanol at 1:2 M ratio was prepared for the first time and characterized by FTIR spectroscopy (FTIR), proton NMR (1H NMR) and carbon NMR (13C NMR) techniques. The new DES was used as an extraction solvent in the ultrasound assisted liquid-liquid microextraction (UA-LLME) of Erythrosine (E127) in blood, urine, pharmaceutical tablet and syrup samples. Accurate and sensitive determination of erythrosine was accomplished with the combination use of DES-UA-LLME and UV-visible spectrophotometric detection. Before applying UA-LLME, while protein precipitation was applied to blood samples, pharmaceutical tablets were homogenized and dissolved in methanol. The proposed DES-UA-LLME/UV-visible procedure was applied directly to urine, syrup sample and supernatant of blood and tablet samples with high recoveries in range of 90% and 100%. Erythrosine in the aqueous sample phase was extracted into 200μL hydrophobic DES phase at pH 7.0. The effect of important anal. variables such as pH of sample solution, mol ratio of DES components, volume of DES, ultrasonic-based extraction time, sample volume and salt effect were optimized. The preconcentration factor (PF), limit of detection (LOD), intra-day and inter-day relative standard deviations (relative standard deviation, %) for the developed procedure were found as 40, 3.75μg·L-1, 2.6% and 4.6%, resp.

Spectrochimica Acta, Part A: Molecular and Biomolecular Spectroscopy published new progress about Blood analysis. 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

Parvin Shahdousti published the artcileSimultaneous Determination of Lamotrigine and Carbamazepine in Plasma Using Ultrasound-Assisted Emulsification Microextraction-High Performance Liquid Chromatography, Synthetic Route of 111-87-5, the main research area is lamotrigine carbamazepine ultrasound assisted emulsification microextraction HPLC.

A simple, fast and efficient method based on ultrasound-assisted emulsification microextraction (USAEME) followed by HPLC has been developed for simultaneous determination of Carbamazepine (CBZ) and Lamotrigine (LTG) in biol. samples. The influence of different parameters affecting the USAEME procedure was evaluated to optimize the efficiency of the process. At these conditions, validation of the proposed method was performed based on European medicines agency guidelines. The proposed method showed good linearity in plasma samples ranging from 0.25 to 6μg/mL and 0.13 to 6μg/mL (R2 ≥ 0.99) for CBZ and LTG, resp. The precision of the proposed method was evaluated for repeatability which was ≤12% (n = 5). The detection limits of 0.06 and 0.05μg/mL were obtained for CBZ and LTG, resp. The proposed method can be applied as an effective technique for therapeutic drug monitoring of CBZ and LTG in plasma of epileptic patients.

Journal of Analytical Chemistry published new progress about Blood analysis. 111-87-5 belongs to class alcohols-buliding-blocks, name is n-Octanol, and the molecular formula is C8H18O, Synthetic Route of 111-87-5.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Zhang, Huiying published the artcileMultivariate relationships among sensory attributes and volatile components in commercial dry porcini mushrooms (Boletus edulis), Quality Control of 111-87-5, the main research area is porcini mushroom sensory characterization multivariate analysis; Aroma characteristic; Dry porcini mushroom; Hedonic rating; Multivariate analysis; Relative odor activity value; Volatile compound.

The present research investigated the relationships among sensory attributes and volatile components in dry porcini mushrooms by multivariate statistical analyses. The sensory characteristics were based on quant. descriptive anal. and consumer hedonic assessment. The volatile compounds were extracted by solid-phase microextraction, then were identified using gas chromatog.-mass spectrometry and gas chromatog.-olfactometry. The results showed that the high hedonic rating of porcini mushrooms was due in part to its aroma notes such as seasoning-like, roasted, cacao-like and smoky. High hedonic liking and pos. aromas of porcini mushrooms could be responsible for the volatiles including 3-(methylthio)propanal, 3-(methylthio)propanol, pyrazines, phenolic and furanone components. On the other hand, raw mushroom-like, cardboard-like, as well as sweaty attributes were attributed to the relatively low hedonic liking of porcini mushrooms, which correlated with high contents of 1-octen-3-ol, octanal, 2-pentylfuran and 3-methylbutanoic acid. The information reported here could be important for the quality control of com. porcini mushrooms by providing an approach to strengthen the interpretation of sensory data by showing how they were affected by the chem. properties.

Food Research International published new progress about Boletus edulis. 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

Zhang, Huiying published the artcileMultivariate relationships among sensory attributes and volatile components in commercial dry porcini mushrooms (Boletus edulis), Name: 3-(Methylthio)propan-1-ol, the main research area is porcini mushroom sensory characterization multivariate analysis; Aroma characteristic; Dry porcini mushroom; Hedonic rating; Multivariate analysis; Relative odor activity value; Volatile compound.

The present research investigated the relationships among sensory attributes and volatile components in dry porcini mushrooms by multivariate statistical analyses. The sensory characteristics were based on quant. descriptive anal. and consumer hedonic assessment. The volatile compounds were extracted by solid-phase microextraction, then were identified using gas chromatog.-mass spectrometry and gas chromatog.-olfactometry. The results showed that the high hedonic rating of porcini mushrooms was due in part to its aroma notes such as seasoning-like, roasted, cacao-like and smoky. High hedonic liking and pos. aromas of porcini mushrooms could be responsible for the volatiles including 3-(methylthio)propanal, 3-(methylthio)propanol, pyrazines, phenolic and furanone components. On the other hand, raw mushroom-like, cardboard-like, as well as sweaty attributes were attributed to the relatively low hedonic liking of porcini mushrooms, which correlated with high contents of 1-octen-3-ol, octanal, 2-pentylfuran and 3-methylbutanoic acid. The information reported here could be important for the quality control of com. porcini mushrooms by providing an approach to strengthen the interpretation of sensory data by showing how they were affected by the chem. properties.

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

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts