Month: November 2022

On March 1, 2021, Cerciello, F.; Apicella, B.; Russo, C.; Cortese, L.; Senneca, O. published an article.Application of 707-07-3 The title of the article was Effects of pressure on lignocellulosic biomass fast pyrolysis in nitrogen and carbon dioxide. And the article contained the following:

The present study investigates the influence of pressure on the products of fast pyrolysis of a lignocellulosic biomass (Walnut Shells). Experiments were carried out using a special heated strip reactor (HSR) at temperature of 1573 and 2073 K, pressure up to 8 bar and heating rate of 104 K/s. Two atmospheres have been investigated: N2 and CO2. Increasing the pressure of heat treatment, the combustion pattern and the average combustion reactivity of the chars change remarkably. Multiple components with different combustion reactivity have been found in the char samples. Upon heat treatment in N2 the most reactive components are depleted more easily than upon heat treatment in CO2. Consequently, thermodeactivation is more severe in N2 than in CO2. Raman anal. of the chars shows that graphitic order develops only upon heat treatment at 2073 K at the pressure of 2 bar, but not upon heat treatment at 1573 K, not even at the higher pressure investigated (4 and 8 bar). The loss of reactivity induced by pressure is therefore ascribed to changes in the internal distribution of char components. The evolution of the solid components is accompanied by changes in the distribution of aliphatics/methoxy aromatic compounds in the produced tar. The interplay of temperature, pressure, and CO2 affects both mineral matter and the carbon matrix resulting into a rather complex behavior. The experimental process involved the reaction of (Trimethoxymethyl)benzene(cas: 707-07-3).Application of 707-07-3

The Article related to nitrogen carbon dioxide pressure lignocellulosic biomass pyrolysis, Placeholder for records without volume info and other aspects.Application of 707-07-3

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

On July 31, 2022, He, Fei; Yang, Shiqi; Zhang, Guihu; Xu, Ling; Li, Hehe; Sun, Jinyuan; Huang, Mingquan; Zheng, Fuping; Sun, Baoguo published an article.Application In Synthesis of Diethyl succinate The title of the article was Exploration of key aroma active compounds in strong flavor Baijiu during the distillation by modern instrument detection technology combined with multivariate statistical analysis methods. And the article contained the following:

Liquid-liquid microextraction (LLME) combined with gas chromatog.-mass spectrometry (GC-MS) and headspace-gas chromatog.-ion mobility spectrometry (HS-GC-IMS) were used to detect the variations in volatile compounds during the distillation process of strong flavor raw Baijiu. The 3D fingerprint spectrum clearly showed a variation in volatile compounds from different distillation stages, and most alc.-soluble and low mol. weight compounds showed a downward trend with the extension of distillation time, but water-soluble, high mol. weight and high boiling compounds showed the opposite result. Then, 50 aroma compounds were sniffed and identified by gas chromatog.-olfactometry-mass spectrometry (GC-O-MS) and multivariate statistical anal. including principal component anal. (PCA) and partial least squares discriminant anal. (PLS-DA) confirmed four aroma active markers related to classification. Finally, the receiver operating characteristic (ROC) curve was further used to verify that Et butanoate and Et hexanoate were the most effective difference marker to distinguish the head Baijiu samples and butanoic acid was the most effective difference marker for distinguishing the heart Baijiu samples from the tail Baijiu samples. The experimental process involved the reaction of Diethyl succinate(cas: 123-25-1).Application In Synthesis of Diethyl succinate

The Article related to hexyl hexanoate phenylacetaldehyde pentanoic acid ethyl linolenate, Placeholder for records without volume info and other aspects.Application In Synthesis of Diethyl succinate

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

On December 31, 2020, Li, Xuefeng; Chen, Lingying; Han, Weifang; Ge, Chunhua; Guan, Hongyu; Zhang, Rui; Zhang, Xiangdong published an article.Recommanded Product: 2,2-Dimethylpropane-1,3-diyl bis(2-methylacrylate) The title of the article was Preparation and Thermal Properties of Shape-stabilized Paraffin/ NPGDMA/BN Composite for Phase Change Energy Storage. And the article contained the following:

Paraffin, as an excellent phase change material (PCM), is limited by the leakage problem and low thermal conductivity In this research, a novel paraffin/neopentyl glycol dimethacrylate/boron nitride (paraffin/NPGDMA/BN) composite PCM was successfully prepared via a phys. mixing process. NPGDMA in paraffin/NPGDMA/BN composite PCM was cured by UV light under the action of photo initiator, which can improve the shape stability to avoid the leakage of paraffin in the process of phase change. By comparing the leakage rate, latent heat, and thermal conductivity, the optimal mass ratio of paraffin and NPGDMA was selected to be 7 : 3. It was showed that the presence of 5 wt% BN led to increasing in thermal conductivity by up to 59%. The microstructure of the composite PCMs was characterized by SEM, FTIR, and XRD. The composite PCMs can be processed into a variety of shapes by using molds. The paraffin/NPGDMA/BN composite PCM exhibited a significantly improved shape stability and large phase change enthalpy of 123.0 J/g. The leakage rate of paraffin/NPGDMA/BN was much improved after being soaked with petroleum ether. The experimental process involved the reaction of 2,2-Dimethylpropane-1,3-diyl bis(2-methylacrylate)(cas: 1985-51-9).Recommanded Product: 2,2-Dimethylpropane-1,3-diyl bis(2-methylacrylate)

The Article related to stabilized paraffin npgdma bn composite phase change energy storage, Placeholder for records without volume info and other aspects.Recommanded Product: 2,2-Dimethylpropane-1,3-diyl bis(2-methylacrylate)

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Yang, Shilun; Li, Simeng; Chang, Junlei published an article in 2022, the title of the article was Discovery of Cobimetinib as a novel A-FABP inhibitor using machine learning and molecular docking-based virtual screening.Recommanded Product: Phenyl Salicylate And the article contains the following content:

Adipocyte fatty acid-binding protein (A-FABP, also called FABP4, aP2) is an adipokine identified as a critical regulator of metabolic function due to its dual functions of fatty acid transport and pro-inflammation. Because of the high therapeutic potential of A-FABP inhibition for the treatment of metabolic diseases and related vascular complications, numerous inhibitors have been developed against A-FABP. However, none of these inhibitors have been approved for use in patients due to severe side effects. Here, we used a virtual screening (VS) strategy to identify potential inhibitors of A-FABP in the latest FDA-approved drug library (∼2600 compounds), aiming to explore the existing drugs with proven safety profiles. We firstly combined ligand-based machine learning and structure-based mol. docking to develop a screening pipeline for identifying A-FABP inhibitors. The screening of FDA-approved drugs identified four compounds (Cobimetinib, Larotrectinib, Pantoprazole, and Vildagliptin) with the highest scores, whose inhibitory effects on A-FABP were further assessed in cellular assays. Among the selected compounds, Cobimetinib significantly inhibited the activation of the JNK/c-Jun signaling pathway by A-FABP in mouse macrophages without causing obvious cytotoxicity. In summary, we present an integrated VS pipeline for A-FABP inhibitor screening, and identified Cobimetinib as a novel A-FABP inhibitor that may be repurposed for the treatment of metabolic diseases and associated vascular complications. The experimental process involved the reaction of Phenyl Salicylate(cas: 118-55-8).Recommanded Product: Phenyl Salicylate

The Article related to cobimetinib antimetabolic agent fabp4 drug target metabolic disease, Placeholder for records without volume info and other aspects.Recommanded Product: Phenyl Salicylate

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Zhang, Jinglin; Li, Juan; Wang, Juan; Sun, Baoguo; Liu, Yuping; Huang, Mingquan published an article in 2021, the title of the article was Characterization of aroma-active compounds in Jasminum sambac concrete by aroma extract dilution analysis and odour activity value.Application of 85-91-6 And the article contains the following content:

Jasminum sambac is a flower and usually used in food, cosmetics or other chem. industries for its unique flavor characteristics in China. However, mol. sensory technologies have not applied to identify aroma-active compounds in J sambac concrete. In this study, gas chromatog.-olfactometry (GC-O), gas chromatog.-mass spectrometry and solvent-assisted flavor evaporation were applied to isolate the odorants in three Chinese J sambac concrete (E1, E2 and E3) obtained from different companies. A total of forty-nine, forty-eight, thirty-nine odorants were screened by GC-O with aroma extract dilution anal. in E1, E2 and E3, resp. The higher flavor dilution (FD) factors were linalool (19 683-59 049, floral), Me anthranilate (6561-19 683, grape-like) and benzyl acetate (2187-19 683, floral). Twenty-two aroma compounds were quantitated by gas chromatog.-flame ionization detection with internal standard, and then their odor activity values were obtained. Linalool, cis-3-hexenyl acetate, linalyl acetate, eugenol and Me salicylate contributed greatly to the aroma of J sambac concretes. The aroma recombination model was established by mixing twenty-two key odorants based on their measured concentrations, and the result revealed that the overall aroma profile was similar to that of the original sample. These results proved basic data for improvement of the national standard of jasmine concrete. The experimental process involved the reaction of Methyl N-Methylanthranilate(cas: 85-91-6).Application of 85-91-6

The Article related to linalool cis3hexanyl acetate eugenol aroma active compound jasminum, Placeholder for records without volume info and other aspects.Application of 85-91-6

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Zdun, Beata; Ciesla, Piotr; Kutner, Jan; Borowiecki, Pawel published an article in 2022, the title of the article was Expanding Access to Optically Active Non-Steroidal Anti-Inflammatory Drugs via Lipase-Catalyzed KR of Racemic Acids Using Trialkyl Orthoesters as Irreversible Alkoxy Group Donors.HPLC of Formula: 707-07-3 And the article contains the following content:

Studies into the enzymic kinetic resolution (EKR) of 2-arylpropanoic acids (′profens′), as the active pharmaceutical ingredients (APIs) of blockbuster non-steroidal anti-inflammatory drugs (NSAIDs), by using various trialkyl orthoesters as irreversible alkoxy group donors in organic media, were performed. The enzymic reactions of target substrates were optimized using several different immobilized preparations of lipase type B from the yeast Candida antarctica (CAL-B). The influence of crucial parameters, including the type of enzyme and alkoxy agent, as well as the nature of the organic co-solvent and time of the process on the conversion and enantioselectivity of the enzymic kinetic resolution, is described. The optimal EKR procedure for the racemic profens consisted of a Novozym 435-STREM lipase preparation suspended in a mixture of 3 equiv of tri-Me or tri-Et orthoacetate as alkoxy donor and toluene or n-hexane as co-solvent, depending on the employed racemic NSAIDs. The reported biocatalytic system provided optically active products with moderate-to-good enantioselectivity upon esterification lasting for 7-48 h, with most promising results in terms of enantiomeric purity of the pharmacol. active enantiomers of title APIs obtained on the anal. scale for: (S)-flurbiprofen (97% ee), (S)-ibuprofen (91% ee), (S)-ketoprofen (69% ee), and (S)-naproxen (63% ee), resp. In turn, the employment of optimal conditions on a preparative-scale enabled us to obtain the (S)-enantiomers of: flurbiprofen in 28% yield and 97% ee, ibuprofen in 45% yield and 56% ee, (S)-ketoprofen in 23% yield and 69% ee, and naproxen in 42% yield and 57% ee, resp. The devised method turned out to be inefficient toward racemic etodolac regardless of the lipase and alkoxy group donor used, proving that it is unsuitable for carboxylic acids possessing tertiary chiral centers. The experimental process involved the reaction of (Trimethoxymethyl)benzene(cas: 707-07-3).HPLC of Formula: 707-07-3

The Article related to arylpropanoic acid enzymic kinetic resolution lipase catalyzed nsaid, Placeholder for records without volume info and other aspects.HPLC of Formula: 707-07-3

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

On October 11, 2022, Aljuaid, Mohammed; Houck, Hannes A.; Efstathiou, Spyridon; Haddleton, David M.; Wilson, Paul published an article.COA of Formula: C4H8ClNOS The title of the article was Photocrosslinking of Polyacrylamides Using [2 + 2] Photodimerisation of Monothiomaleimides. And the article contained the following:

The [2 + 2] photocycloaddition of monothiomaleimides (MTMs) has been exploited for the photocrosslinking of polyacrylamides. Polymer scaffolds composed of dimethylacrylamide and varying amounts of D,L-homocysteine thiolactone acrylamide (5, 10, and 20 mol %) were synthesized via free-radical polymerization, whereby the latent thiol functionality was exploited to incorporate MTM motifs. Subsequent exposure to UV light (λ = 365 nm, 15 mW cm-2) triggered intermol. crosslinking via the photodimerization of MTM side chains, thus resulting in the formation of polyacrylamide gels. The polymer scaffolds were characterized using Fourier transform IR spectroscopy, UV-visible spectroscopy, 1H NMR spectroscopy, and size exclusion chromatog., confirming the occurrence of the [2 + 2] photocycloaddition between the MTM moieties. The mech. and phys. properties of the resulting gels containing various MTM mol % were evaluated by rheol., compression testing, and swelling experiments In addition, SEM was used to characterize the xerogel morphol. of 5 and 10 mol % MTM hydro- and organo-gels. The macro-porous morphol. obtained for the hydrogels was attributed to phase separation due to the difference in solubility of the PDMA modified with thiolactone side chains, provided that a more homogeneous morphol. was obtained when the photo-gels were prepared in DMF as the solvent. The experimental process involved the reaction of 3-Aminodihydrothiophen-2(3H)-one hydrochloride(cas: 6038-19-3).COA of Formula: C4H8ClNOS

The Article related to photocrosslinking polyacrylamide photodimerization monothiomaleimide, Placeholder for records without volume info and other aspects.COA of Formula: C4H8ClNOS

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

On September 14, 2021, Tang, Shuqin; Chen, Yukun; Song, Guixian; Liu, Xiaotu; Shi, Yumeng; Xie, Qitong; Chen, Da published an article.Category: esters-buliding-blocks The title of the article was A Cocktail of Industrial Chemicals in Lipstick and Nail Polish: Profiles and Health Implications. And the article contained the following:

Beauty products contain various industrial chems. to increase their functionality and appearance. The frequent use of beauty products may increase human exposure to industrial chems., but to date, their chem. components remain poorly characterized. Our work characterized the chem. components in lipstick and nail polish by screening for a total of 231 chems. from seven categories, including organophosphate esters (OPEs), phthalate esters (PAEs), non-PAE plasticizers, bisphenol analogs, parabens, UV stabilizers, and antioxidants. Their total concentrations ranged from 38.9 to 3810 μg/g (median of 193 μg/g) and from 18.6 to 1910 μg/g (307 μg/g) in lipstick (n = 34) and nail polish (n = 15), resp. The chem. compositions differed between lipstick and nail polish, but non-PAE plasticizers generally dominated over other groups of chems. A number of emerging plasticizers, OPEs, and UV stabilizers have rarely been reported in personal care products or environmental samples but were found at very high levels in beauty products, raising concern about their environmental release and human exposure risk. Although the employment of a hazard quotient approach suggested low health risks for exposure to industrial chems. from the use of beauty products, potential mixture effects from the chem. cocktail and occupational exposure to beauty products should not be overlooked. The experimental process involved the reaction of Tris(2-ethylhexyl) benzene-1,2,4-tricarboxylate(cas: 3319-31-1).Category: esters-buliding-blocks

The Article related to industrial chem lipstick nail polish health exposure risk assessment, Placeholder for records without volume info and other aspects.Category: esters-buliding-blocks

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

On February 28, 2022, Orikasa, Isamu; Osada, Takuma; Inatomi, Yuko; Ueno, Ichiro; Suzuki, Shinsuke published an article.COA of Formula: C13H10O3 The title of the article was Natural convection induced by unintended horizontal temperature distribution in a narrow-closed container heated from above. And the article contained the following:

This study aims at expressing the velocity fields of the liquids held in a narrow-closed container heated from above as a function of the dimensions of the container to estimate the diffusion-dominant condition. The motions of tracer particles in liquid salol held in a quasi-two-dimensional glass cell were tracked in cavities of various inner width W through the series of experiments The mean velocity of the tracer particles, Vmean, decreased almost linearly with the decrease in the values of W. Thermal flow fields were successfully reproduced by the series of numerical simulations. We found that the unintended horizontal temperature difference is realized, which induces the natural convection in the closed narrow cavity heated from above. We derived the correlation between the Reynolds and Grashof numbers, which are described as a function of the mean velocity and the unintended horizontal temperature difference, resp. The threshold of the convection onset in the present geometry was then proposed. The experimental process involved the reaction of Phenyl Salicylate(cas: 118-55-8).COA of Formula: C13H10O3

The Article related to container heat natural convection horizontal temperature distribution, Placeholder for records without volume info and other aspects.COA of Formula: C13H10O3

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

On December 1, 2020, Kassotis, Christopher D.; Herkert, Nicholas J.; Hammel, Stephanie C.; Hoffman, Kate; Xia, Qianyi; Kullman, Seth W.; Sosa, Julie Ann; Stapleton, Heather M. published an article.Application In Synthesis of Tris(2-ethylhexyl) benzene-1,2,4-tricarboxylate The title of the article was Thyroid Receptor Antagonism of Chemicals Extracted from Personal Silicone Wristbands within a Papillary Thyroid Cancer Pilot Study. And the article contained the following:

Research suggests that thyroid cancer incidence rates are increasing, and environmental exposures have been postulated to be playing a role. To explore this possibility, we conducted a pilot study to investigate the thyroid disrupting bioactivity of chem. mixtures isolated from personal silicone wristband samplers within a thyroid cancer cohort. Specifically, we evaluated TRβ antagonism of chem. mixtures extracted from wristbands (n = 72) worn by adults in central North Carolina participating in a case-control study on papillary thyroid cancer. Sections of wristbands were solvent-extracted and analyzed via mass spectrometry to quantify a suite of semivolatile chems. A second extract from each wristband was used in a bioassay to quantify TRβ antagonism in human embryonic kidney cells (HEK293/17) at concentrations ranging from 0.1 to 10% of the original extract (by volume). Approx. 70% of the sample extracts tested at a 1% extract concentration exhibited significant TRβ antagonism, with a mean of 30% and a range of 0-100%. Inhibited cell viability was noted in >20% of samples that were tested at 5 and 10% concentrations Antagonism was pos. associated with wristband concentrations of several phthalates, organophosphate esters, and brominated flame retardants. These results suggest that personal passive samplers may be useful in evaluating the bioactivities of mixtures that people contact on a daily basis. We also report tentative associations between thyroid receptor antagonism, chem. concentrations, and papillary thyroid cancer case status. Future research utilizing larger sample sizes, prospective data collection, and measurement of serum thyroid hormone levels (which were not possible in this study) should be utilized to more comprehensively evaluate these associations The experimental process involved the reaction of Tris(2-ethylhexyl) benzene-1,2,4-tricarboxylate(cas: 3319-31-1).Application In Synthesis of Tris(2-ethylhexyl) benzene-1,2,4-tricarboxylate

The Article related to thyroid receptor antagonist silicone wristband papillary thyroid cancer, Placeholder for records without volume info and other aspects.Application In Synthesis of Tris(2-ethylhexyl) benzene-1,2,4-tricarboxylate

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics