Month: December 2022

Walter, Teresa published the artcileDispersion-based, scalable fabrication of repellent superhydrophobic and liquid-infused coatings under ambient conditions, Product Details of C16H30O2, the main research area is polymer coating material superhydrophobicity.

Superhydrophobic and liquid-infused porous coatings provide effective repellency against contaminations and ensure efficient performance of surfaces in a wide range of applications. Conventional fabrication processes of such coatings typically require fluorinated components, toxic solvents, and elevated temperatures, and therefore contribute to environmental pollution. Here, we present a dispersion-based, fluorine-free coating system that produces highly repellent surface coatings at ambient conditions. Our system is based on aqueous dispersions of a polymeric binder and hydrophobic fumed silica particles, which upon drying self-organize into a micro- and nanostructured thin film with superhydrophobic properties, characterized by a water contact angle above 150° and a contact angle hysteresis below 10°. An addnl. dispersion-based coating step allows infusing these structures with silicone oil, thus producing a lubricant-infused repellent coating mimicking the pitcher plant. Water droplets on such coatings exhibit efficient repellency properties, characterized by low sliding angles (<5°) and contact angle hysteresis of water droplets (<10°). Our method provides a versatile, dispersion-based toolbox to create functional, repellent coatings in a simple, scalable and environmentally benign process. Green Chemistry published new progress about Coating materials. 142-90-5 belongs to class esters-buliding-blocks, name is Dodecyl 2-methylacrylate, and the molecular formula is C16H30O2, Product Details of C16H30O2.

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

Xu, Liyun published the artcileThe effect of hydroxyl on the superhydrophobicity of dodecyl methacrylate (LMA) coated fabrics through simple dipping-plasma crosslinked method, Product Details of C16H30O2, the main research area is hydroxyl superhydrophobicity dodecyl methacrylate fabric dipping plasma crosslinked method.

In order to obtain stable superhydrophobicity, suitable hydrophobic treatment agents should be selected according to different material properties. In this paper, cotton and poly(ethylene terephthalate) (PET) fabrics were resp. coated with dodecyl methacrylate (LMA) via argon combined capacitively coupled plasma (CCP), and the surface hydrophobicity and durability of the treated cotton and polyester fabrics are also discussed. An interesting phenomenon happened, whereby the LMA-coated cotton fabric (Cotton- g-LMA) had better water repelling and mech. durability properties than LMA-coated PET fabric (PET- g-LMA), and LMA-coated hydroxyl-grafted PET fabrics (PET fabrics were successively coated with polyethylene glycol (PEG) and LMA, PET- g-PEG & LMA) had a similar performance to cotton fabrics. The water contact angles of Cotton- g-LMA, PET- g-LMA and PET- g-PEG & LMA were 156 °, 153 ° and 155 °, resp., and after 45 washing cycles or 1000 rubbing cycles, the corresponding water contact angles decreased to 145 °, 88 °, 134 ° and 146 °, 127 ° and 143 °, resp. Addnl., thermoplastic polyurethane (TPU) and polyamides-6 (PA6) fabrics all exhibited the same properties as the PET fabric. Therefore, the grafting of hydroxyl can improve the hydrophobic effect of LMA coating and the binding property between LMA and fabrics effectively, without changing the wearing comfort.

Coatings published new progress about Coating materials. 142-90-5 belongs to class esters-buliding-blocks, name is Dodecyl 2-methylacrylate, and the molecular formula is C16H30O2, Product Details of C16H30O2.

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

Shi, Jie published the artcileCharacterization of Key Aroma Compounds in Tartary Buckwheat (Fagopyrum tataricum Gaertn.) by Means of Sensory-Directed Flavor Analysis, Recommanded Product: Hexyl 2-hydroxybenzoate, the main research area is aroma flavor Fagopyrum tartary buckwheat; aroma extract dilution analysis; aroma-active compounds; chiral analysis; sensory-directed flavor analysis; tartary buckwheat.

The key odorants of tartary buckwheat (TB) were researched by a sensory-directed flavor anal. approach for the first time. After the volatiles of TB were isolated by solvent-assisted flavor evaporation (SAFE), 49 aroma-active components with flavor dilution (FD) factors in the range of 1-2187 were identified using gas chromatog.-olfactometry-mass spectrometry (GC-O-MS) combined with aroma extract dilution anal. (AEDA). Geranylacetone, phenethyl alc., and β-damascone showed the highest FD factors of 2187. All 49 odorants were further quantitated by the internal standard curve method, and their odor activity values (OAVs) were obtained. The overall aroma of TB was successfully simulated (similarity > 98.16%) by mixing 16 odorants (OAV â‰?1) with their natural concentrations The omission tests revealed that geosmin, α-isomethylionone, α-methylionone, β-ionone, linalool, β-damascone, geranylacetone, guaiacol, Et hexanoate, geraniol, vanillin, tetrahydrolinalool, and 2,5-dimethyl-4-hydroxy-3-(2H)-furanone were the key odorants of TB. Chiral anal. showed that tetrahydrolinalool and linalool existed as racemics in the com. TB. The relative content of R-enantiomers of α-isomethylionone and α-methylionone was slightly higher than that of their S-enantiomers. The odor thresholds of R- and S-enantiomer of tetrahydrolinalool were first detected as 0.029 and 3.8μg/L in air, resp.

Journal of Agricultural and Food Chemistry published new progress about Chiral resolution. 6259-76-3 belongs to class esters-buliding-blocks, name is Hexyl 2-hydroxybenzoate, and the molecular formula is C13H18O3, Recommanded Product: Hexyl 2-hydroxybenzoate.

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

Valentini, Federica published the artcileTailor-Made POLITAG-Pd0 Catalyst for the Low-Loading Mizoroki-Heck Reaction in γ-Valerolactone as a Safe Reaction Medium, Safety of Isopentyl 3-(4-methoxyphenyl)acrylate, the main research area is tailor POLITAG Pd0 catalyst Mizoroki Heck gamma valerolactone safe.

In this contribution, we have reported our study on the fine-tuned design and synthesis of new POLITAGs-Pd0 (POLymeric Ionic TAG) catalytic systems with the intention of defining highly efficient heterogeneous palladium catalysts stabilized by ionic tags able to operate at a very low loading while being fully recoverable/reusable. By varying both the support and the ratio between the metal and immobilized ionic tag, we have accessed five different heterogeneous catalytic systems that have been fully characterized (EA, XPS, TEM, and HR-TEM) to investigate their morphol. differences. The catalytic efficiency of the newly prepared POLITAGs-Pd0 materials was then tested and compared in the representative Mizoroki-Heck cross-coupling reaction, a universally investigated and widely useful process. A close correlation between the catalyst support and catalytic performances has been highlighted. The best system POLITAG-Pd0-HM features a high TOF value (26,786 h-1), affording the final products in high isolated yields by using as little as only 0.0007 mol % of Pd. Moreover, this high catalytic activity coupled with the use of γ-valerolactone (GVL) as a green reaction medium has led to the definition of a very efficient waste-minimized protocol. The newly designed catalyst has been utilized in the representative synthesis of Amiloxate, a widely used sunscreen agent, that could be prepared with negligible metal contamination and very low E-factor.

ACS Sustainable Chemistry & Engineering published new progress about Catalyst supports. 71617-10-2 belongs to class esters-buliding-blocks, name is Isopentyl 3-(4-methoxyphenyl)acrylate, and the molecular formula is C15H20O3, Safety of Isopentyl 3-(4-methoxyphenyl)acrylate.

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

Ek, Frida published the artcileSorafenib and nitazoxanide disrupt mitochondrial function and inhibit regrowth capacity in three-dimensional models of hepatocellular and colorectal carcinoma, COA of Formula: C12H9N3O5S, the main research area is sorafenib nitazoxanide hepatocellular colorectal carcinoma three dimensional model.

Quiescent cancer cells in malignant tumors can withstand cell-cycle active treatment and cause cancer spread and recurrence. Three-dimensional (3D) cancer cell models have led to the identification of oxidative phosphorylation (OXPHOS) as a context-dependent vulnerability. The limited treatment options for advanced hepatocellular carcinoma (HCC) and colorectal carcinoma (CRC) metastatic to the liver include the multikinase inhibitors sorafenib and regorafenib. Off-target effects of sorafenib and regorafenib are related to OXPHOS inhibition; however the importance of this feature to the effect on tumor cells has not been investigated in 3D models. We began by assessing global transcriptional responses in monolayer cell cultures, then moved on to multicellular tumor spheroids (MCTS) and tumoroids generated from a CRC patient. Cells were treated with chemotherapeutics, kinase inhibitors, and the OXPHOS inhibitors. Cells grown in 3D cultures were sensitive to the OXPHOS inhibitor nitazoxanide, sorafenib, and regorafenib and resistant to other multikinase inhibitors and chemotherapeutic drugs. Furthermore, nitazoxanide and sorafenib reduced viability, regrowth potential and inhibited mitochondrial membrane potential in an additive manner at clin. relevant concentrations This study demonstrates that the OXPHOS inhibition caused by sorafenib and regorafenib parallels 3D activity and can be further investigated for new combination strategies.

Scientific Reports published new progress about Cancer recurrence. 55981-09-4 belongs to class esters-buliding-blocks, name is 2-((5-Nitrothiazol-2-yl)carbamoyl)phenyl acetate, and the molecular formula is C12H9N3O5S, COA of Formula: C12H9N3O5S.

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

Dai, Qianying published the artcileInvestigating volatile compounds’ contributions to the stale odour of green tea, HPLC of Formula: 140-11-4, the main research area is Camellia volatile compound stale odor.

Summary : This study aimed to characterize the volatiles that contribute to stale odor of green tea. Volatiles were extracted using headspace solid-phase microextraction (HS-SPME) and analyzed using gas chromatog.-mass spectrometry (GC-MS) and gas chromatog.-olfactometry (GC-O). Results showed that a total of ninety-six volatiles were identified by GC-MS, in which forty-four volatiles were screened out based on Principal component anal. (PCA) and orthogonal projections to latent structures-discriminant anal. (OPLS-DA), and thirty-nine volatiles had a significant variation at the level of 0.05 by anal. of variance (ANOVA). From GC-O anal., fifty-four aromatic volatiles with strong aroma intensity (aroma intensity above 2) were perceived. Further investigation revealed that fifteen volatiles, including 1-octen-3-ol, benzyl alc., benzaldehyde, safranal, β-cyclocitral, (E,E)-3,5-octadien-2-one, (Z,E)-3,5-octadien-2-one, di-Me adipate, dihydroactinidiolide, β-ionone, α-ionone, geranyl acetone, phenylethyl alc., Me decanoate and α-terpineol were responsible for stale odor, besides the former nine compounds were only found in stored tea.

International Journal of Food Science and Technology published new progress about Camellia sinensis. 140-11-4 belongs to class esters-buliding-blocks, name is Benzyl acetate, and the molecular formula is C9H10O2, HPLC of Formula: 140-11-4.

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

Zhu, Biying published the artcileAroma profile of Jinmudan tea produced using Camellia sinensis, cultivar Jinmudan using solid-phase microextraction, gas chromatography-mass spectrometry, and chemometrics, Computed Properties of 140-11-4, the main research area is Jinmudan tea Camellia aroma solid phase microextraction gas chromatog.

Jinmudan (JM) tea, produced using Camellia sinensis, cultivar JM, is popular among consumers because of its strong floral and fruity aroma. Aroma profiles of white, green, black, and oolong teas, which were obtained from JM and Tanyangcaicha (TY, control and indigenous variety), were investigated. Sensory evaluation was used to describe the quality characteristics of the tea samples. A combination of headspace solid-phase microextraction, gas chromatog.-mass spectrometry (HS-SPME/GC-MS), and chemometrics was used to extract and analyze the volatiles in the samples; 162 volatiles were identified and categorized on the basis of their chem. structures. The proportions of chem. categories differed among the teas. The same type of tea obtained from JM and TY differed significantly in concentrations and categories of volatiles. This study will improve our understanding of the profile of volatile compounds in JM teas and create a basis for investigating the biol. characteristics of JM teas.

European Food Research and Technology published new progress about Camellia sinensis. 140-11-4 belongs to class esters-buliding-blocks, name is Benzyl acetate, and the molecular formula is C9H10O2, Computed Properties of 140-11-4.

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

Liao, Xueli published the artcileIdentification of key odorants responsible for cooked corn-like aroma of green teas made by tea cultivar Zhonghuang 1, Synthetic Route of 140-11-4, the main research area is Camellia green tea cooked corn aroma odorant responsible; Aroma recombination; Cooked corn-like aroma green tea; Dimethyl sulfide; GC-O; OAV; S-methylmethionine; Zhonghuang 1.

Fangping green tea (FPGT) produced by Zhonghuang 1 (C. sinensis var. sinensis cv. Zhonghuang 1), a new tea variety, has a classical cooked corn-like aroma, which is completely different from the green tea aroma. In order to illustrate the aroma characteristics of the green tea, the volatiles of FPGT was analyzed with gas chromatog.-mass spectrometry (GC-MS) and gas chromatog.-olfactometry (GC-O). The results showed that odor activity value (OAV) of di-Me sulfide (DMS) was 1195.21 and the odor intensity about DMS was 6.2 in FPGT. Aroma recombination experiment also confirmed the important contribution of DMS to cooked corn-like aroma. Aroma character impact (ACI) values of DMS in tea processed by Zhonghuang 1 and Fudingdabai were 72.01% and 37.86%, resp. This indicated that the high proportion of DMS was the dominant character of green tea with cooked corn-like aroma. In addition, the S-methylmethionine (SMM) content in fresh leaves of Zhonghuang 1 (0.21 mg/g) was significantly higher than that of Fudingdabai (0.16 mg/g), which was an important reason for high DMS content.

Food Research International published new progress about Camellia sinensis. 140-11-4 belongs to class esters-buliding-blocks, name is Benzyl acetate, and the molecular formula is C9H10O2, Synthetic Route of 140-11-4.

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

Wang, Juan published the artcileSuccession patterns of aroma components during brewing process of broomcorn millet (Panicum miliaceum L.) Huangjiu, Name: Methyl octanoate, the main research area is broomcorn millet sotolon methional 3 methylbutanoic acid brewing process; Aging; Broomcorn millet Huangjiu; Chemometrics; Fermentation; Volatile compounds.

The flavor of Huangjiu is closely related to its brewing technol. Patterns of aroma component succession during the process of brewing broomcorn millet Huangjiu were investigated by solvent-assisted flavor evaporation combined with gas chromatog.-mass spectrometry and chemometrics. During fermentation, esters, alcs., acids, ketones, acetals, sulfur compounds, furans, and lactones were formed mostly in the chief fermentation stage; nitrogenous and phenolic compounds increased in the primary fermentation stage and then decreased; aldehydes decreased after fermentation started; and terpenes decreased after five days. During aging, acids, alcs., ketones, lactones, phenols, and nitrogenous and sulfur compounds first decreased and then increased; and esters, acetals, aldehydes, and furans always increased, while terpenes decreased continuously. Key odorants, including acetic acid, 3-methylbutanoic acid, 1,1-diethoxyethane, and 3-methylbutanal, were produced in large quantities in the primary fermentation stage; Et lactate, β-phenylethanol, and 2/3-methyl-1-butanol were generated in large quantities in the chief fermentation stage; and sotolon and methional were generated in the aging stage. This study is of great significance for the quality control of Huangjiu production

Food Research International published new progress about Brewing (process). 111-11-5 belongs to class esters-buliding-blocks, name is Methyl octanoate, and the molecular formula is C9H18O2, Name: Methyl octanoate.

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

Sampaio, Guilherme A. published the artcileHistopathologic evaluation of experimental murine neurocysticercosis after treatment with albendazole/nitazoxanide combination, Category: esters-buliding-blocks, the main research area is neurocysticercosis albendazole nitazoxanide brain; Albendazole; Taenia crassiceps; anthelminthic drugs; experimental neurocysticercosis; nitazoxanide; pathologic evaluation.

Neurocysticercosis (NCC) is most common helminthic brain infection related to epilepsy. Only albendazole (ABZ) and praziquantel are used in its treatment. The development of new therapeutics has been encouraged. Taenia crassiceps cysticerci intracranial infection is the exptl. model used in NCC studies. This study evaluated the histopathol. of the brains of BALB/c mice exptl. infected with T. crassiceps cysticerci after the treatment with the ABZ/nitazoxanide (NTZ) combination. Thirty days after the inoculation the mice received an oral single dose of the ABZ/NTZ combination (40 mg kg-1 each). The control groups were treated with: NaCl 0.9%; ABZ or NTZ. The histopathol. evaluation of the brains was performed 24 h after treatment. The ABZ treatment induced discrete mononuclear inflammatory infiltration, meningitis, gliosis, hyperemia and hippocampus compression; moderate ependimitis and edema. The NTZ treatment induced accentuated inflammatory infiltration, foamy macrophages, ependimitis, choroiditis, gliosis and hyperemia and moderate edema. The ABZ/NTZ combination treatment induced a significant decrease in the polymorphonuclear inflammatory infiltration, ependimitis, choroiditis, gliosis, hyperemia and ventriculomegaly in comparison with the other groups. The cysticerci showed destruction of the tegument not observed in other groups. The ABZ/NTZ combination is efficient as the parasite showed signs of destruction and lower damage to the host’s tissue.

Parasitology published new progress about Brain hippocampus. 55981-09-4 belongs to class esters-buliding-blocks, name is 2-((5-Nitrothiazol-2-yl)carbamoyl)phenyl acetate, and the molecular formula is C12H9N3O5S, Category: esters-buliding-blocks.

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