Month: December 2022

Wang, Qi published the artcileBiocompatible small organic molecule phototheranostics for NIR-II fluorescence/photoacoustic imaging and simultaneous photodynamic/photothermal combination therapy, Product Details of C24H14Cl2O7, the main research area is diketopyrrolopyrrole benzodithiophene nanoparticle NIR fluorescence photodynamic photothermal therapy.

The integrated functionalities of multiple diagnostic and therapeutic modalities in a single phototheranostic nanoplatform have been validated as a significant breakthrough toward cancer theranostics. Nevertheless, most reported nanoplatforms are constructed by using complex components through difficult fabrication processes, and often need different excitation wavelengths. Herein, a novel small-mol. dye, DPP-BDT, with absorption in the NIR-I window and fluorescence emission in the NIR-II region was designed and synthesized, and it presented excellent photodynamic and photothermal performance. Based on single component DPP-BDT, multifunctional phototheranostics were rationally and successfully constructed. From in vitro and in vivo experiments, such nanotheranostics showed excellent tumor destruction abilities under a single wavelength of laser irradiation, benefiting from the NIR-II fluorescence/photoacoustic dual-modal imaging guided photodynamic/photothermal combination therapy.

Materials Chemistry Frontiers published new progress about Absorption. 2044-85-1 belongs to class esters-buliding-blocks, name is 2′,7′-Dichloro-3-oxo-3H-spiro[isobenzofuran-1,9′-xanthene]-3′,6′-diyl diacetate, and the molecular formula is C24H14Cl2O7, Product Details of C24H14Cl2O7.

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

Keshala, K. Kasuni published the artcileBioactivities and GC-MS profiling of Malewana Madhumeha Choorna polyherbal hot infusion, Category: esters-buliding-blocks, the main research area is Malewana madhumeha choorna phytochem hypoglycemia gas chromatog mass spectrometry.

Although traditional practitioners prescribe Malewana Madhumeha Choorna hot infusion (MMCHI) in Sri Lanka to combat diabetes, its antidiabetic properties have yet to be explored. We examined the in vitro hypoglycemic activity of MMCHI using α-amylase, α-glucosidase enzymes, and glucose uptake assays. Further, in vitro antioxidant activity was determined using DPPH (2,2 diphenyl-1-picrylhdrazyl) and H2O2 free radical scavenging activities. To identify the phytochems. present in the hot infusion, we conducted solvent-solvent fractionation (hexane, chloroform, Et acetate, methanol) procedures and subjected them to gas chromatog.-mass spectrometry (GC-MS). Both MMCHI and fractions exhibited a dose-dependent inhibition of glucose uptake and the enzymes α-amylase and α-glucosidase. The hot infusion exhibited enzyme inhibitory activities more or less similar to the standard drug acarbose. Enzyme inhibition was especially pronounced with α-amylase. Glucose uptake by MMCHI was more potent than that of the standard drug, especially at the 125μg/mL dose. Strong antioxidant scavenging activity, comparable to that of the standard drug, was observed in the MMCHI, further indicating its antidiabetic potential. The presence of organic compounds and essential oils in the extract was responsible for potent antidiabetic activities via inhibition of α-amylase enzyme. Also, MMICH exhibited strong free radical scavenging abilities. The current study justifies the use of MMCHI to manage diabetes.

South African Journal of Botany published new progress about Absorption. 110-42-9 belongs to class esters-buliding-blocks, name is Methyl decanoate, and the molecular formula is C11H22O2, Category: esters-buliding-blocks.

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

Tchouakeu Betnga, Prudence Fleur published the artcileImpact of closure material on the chemical and sensory profiles of grappa during storage in bottle, COA of Formula: C11H22O2, the main research area is grappa bottle storage closure material chem sensory profile.

The effects of different closure materials for stoppers were evaluated on the volatile and non-volatile composition and sensory profile of an Italian grappa (a fermented grape pomace brandy) stored in bottles for 12 mo. With respect to tech. stoppers, common micro-granulated cork stoppers increasingly absorbed the distillate over storage and released more intense non-volatile compounds determining the browning of grappa. Higher alcs. and esters were the main compounds contributing to the volatile profile of grappa and were correlated to pungent and floral/fruity aromas, resp. Esters and alcs. from C3 to C8 (Et acetate, Et hexanoate, 3-methyl-1-butanol acetate, 2-methyl-1-propanol, 3-methyl-1-butanol and 1-hexanol) decreased from three to six months of storage and further increased. Instead, the esters Me decanoate, Et decanoate and Et dodecanoate increased from three to six months and then decreased. The sensory profile of grappa was also affected by the common micro-granulated cork stopper after one-year of storage in bottle as determined by the trained panel.

LWT–Food Science and Technology published new progress about Absorption. 110-42-9 belongs to class esters-buliding-blocks, name is Methyl decanoate, and the molecular formula is C11H22O2, COA of Formula: C11H22O2.

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

Colmenar, Inmaculada published the artcileTropospheric reactivity of 2-ethoxyethanol with OH and NO3 radicals and Cl atoms. Kinetic and mechanistic study, SDS of cas: 623-50-7, the main research area is ethoxyethanol hydroxyl radical chlorine tropospheric reactivity.

Recent studies reveal that 2-ethoxyethanol (2EE) (CH3CH2OCH2CH2OH) is emitted from diesel/biodiesel blends used in vehicles. This compound has also been investigated in blends with diesel fuel for the reduction of CO emissions, hydrocarbons and particulate matter. In the work described here, rate coefficients for the reactions of OH and NO3 radicals and Cl atoms with 2EE have been determined at (298 ± 2) K and a total pressure of ∼700 torr using a relative rate method with SPME/GC-MSTOF (Solid Phase Microextraction/Gas Chromatog.-Mass Spectrometry Time of Flight Detection) and FTIR (Fourier Transform IR Spectroscopy) as detection techniques. The following rate coefficients (in cm3 mol.-1 s-1) have been obtained: (2.02 ± 0.19)× 10-10, (2.17 ± 0.11) ×10-11 and (4.80 ± 0.48) × 10-15 for Cl, ·OH and ·NO3 reactions, resp. The product formation has also been investigated. Ethylene glycol monoacetate, ethylene glycol monoformate, formaldehyde, Et glycolate and Et formate have been identified as major products for ·OH and Cl reactions. The formation of nitrated compounds has also been observed for the reactions with ·NO3 and with Cl in the presence of NO. The products are explained by a mechanism involving initial attack of the oxidant at the methylene groups followed by subsequent reactions of the resulting alkyl and alkoxy radicals. The atm. lifetimes calculated for 2EE reveal that the dominant loss process for this compound is clearly the daytime reaction with the OH radical.

Atmospheric Environment published new progress about Absorption. 623-50-7 belongs to class esters-buliding-blocks, name is Ethyl 2-hydroxyacetate, and the molecular formula is C4H8O3, SDS of cas: 623-50-7.

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

Liang, Zhihao published the artcileDose-Dependent Effect of ZnO Quantum Dots for Lettuce Growth, COA of Formula: C24H14Cl2O7, the main research area is zinc oxide quantum dot lettuce biomass antioxidant.

As the cadmium-free semiconductor quantum dots, ZnO quantum dots (ZnO QDs) have wide potential applications in agriculture. However, the effects of ZnO quantum dots on crop growth and nutritional quality have not been fully studied. In this work, the lettuce was sprayed with different concentrations of ZnO QDs from 50 to 500 mg·L-1 to evaluate their influence on lettuce antioxidant, biomass, and nutritional quality. The results showed that ZnO QDs existed in the lettuce in the form of Zn2+. Lettuce treated with 500 mg·L-1 ZnO QDs would produce a large amount of reactive oxygen species (ROS), which adversely affected the absorption of nutrients, soluble protein content, and chlorophyll content, thus reducing plant biomass. When the concentrations range from 50 to 200 mg·L-1, the antioxidant enzyme systems of lettuce were triggered to counteract the damage caused by excessive ROS. Moreover, ZnO QDs at this level promoted Ca, Mg, Fe, Mn, Zn, and B absorption and accumulation; increased soluble sugar content; and improved the lettuce biomass and nutritional quality.

ACS Omega published new progress about Absorption. 2044-85-1 belongs to class esters-buliding-blocks, name is 2′,7′-Dichloro-3-oxo-3H-spiro[isobenzofuran-1,9′-xanthene]-3′,6′-diyl diacetate, and the molecular formula is C24H14Cl2O7, COA of Formula: C24H14Cl2O7.

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

Soudagar, Manzoore Elahi. M. published the artcileThe effects of graphene oxide nanoparticle additive stably dispersed in dairy scum oil biodiesel-diesel fuel blend on CI engine: performance, emission and combustion characteristics, Product Details of C9H18O2, the main research area is graphene oxide nanoparticle biodiesel diesel blend engine combustion emission.

In the present investigation, the effects of graphene oxide nanoparticles on performance and emissions of a CI engine fueled with dairy scum oil biodiesel was studied. Nanofuel blend was prepared by dispersing graphene oxide in varying quantities in dairy scum oil Me ester (DSOME)-diesel blend. Sodium dodecyl sulfate (SDS) was used as a surfactant for a steady dispersion of graphene oxide nanoparticles in the fuel blends. The dispersion and homogeneity were characterized by UV-visible spectrometry. An ideal graphene-to-surfactant ratio was defined, highest absolute value UV-absorbency was seen for a mass fraction of 1:4. The concentration of surfactant above or below this ratio resulted in reduction in the stability of dispersion. Graphene oxide nanoparticles were amalgamated with dairy scum oil biodiesel at proportions of 20, 40 and 60 ppm using ultrasonication technique. Experiments were performed at a constant speed and varying the brake power and load condtions. The results were notable enhancements in the performance and emissions characteristics, the brake thermal efficiency improved by 11.56%, a reduction in brake specific fuel consumption by 8.34%, unburnt hydrocarbon by 21.68%, smoke by 24.88%, carbon monoxide by 38.662% for the nanofuel blend DSOME2040 and oxides of nitrogen emission by 5.62% for fuel DSOME(B20). Similarly, the addition of graphene nanoparticles in DSOME fuel blends resulted in significant reduction in the combustion duration, ignition delay period, improvement in the peak pressure and heat release rate at maximum load condition. Finally, it is concluded that nano-graphene oxide nanoparticles can be introduced as a suitable substitute fuel additive for dairy scum oil biodiesel blends to enhance the overall engine performance and emissions characteristics.

Fuel published new progress about Absorption. 111-11-5 belongs to class esters-buliding-blocks, name is Methyl octanoate, and the molecular formula is C9H18O2, Product Details of C9H18O2.

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

Soudagar, Manzoore Elahi. M. published the artcileThe effects of graphene oxide nanoparticle additive stably dispersed in dairy scum oil biodiesel-diesel fuel blend on CI engine: performance, emission and combustion characteristics, Synthetic Route of 110-42-9, the main research area is graphene oxide nanoparticle biodiesel diesel blend engine combustion emission.

In the present investigation, the effects of graphene oxide nanoparticles on performance and emissions of a CI engine fueled with dairy scum oil biodiesel was studied. Nanofuel blend was prepared by dispersing graphene oxide in varying quantities in dairy scum oil Me ester (DSOME)-diesel blend. Sodium dodecyl sulfate (SDS) was used as a surfactant for a steady dispersion of graphene oxide nanoparticles in the fuel blends. The dispersion and homogeneity were characterized by UV-visible spectrometry. An ideal graphene-to-surfactant ratio was defined, highest absolute value UV-absorbency was seen for a mass fraction of 1:4. The concentration of surfactant above or below this ratio resulted in reduction in the stability of dispersion. Graphene oxide nanoparticles were amalgamated with dairy scum oil biodiesel at proportions of 20, 40 and 60 ppm using ultrasonication technique. Experiments were performed at a constant speed and varying the brake power and load condtions. The results were notable enhancements in the performance and emissions characteristics, the brake thermal efficiency improved by 11.56%, a reduction in brake specific fuel consumption by 8.34%, unburnt hydrocarbon by 21.68%, smoke by 24.88%, carbon monoxide by 38.662% for the nanofuel blend DSOME2040 and oxides of nitrogen emission by 5.62% for fuel DSOME(B20). Similarly, the addition of graphene nanoparticles in DSOME fuel blends resulted in significant reduction in the combustion duration, ignition delay period, improvement in the peak pressure and heat release rate at maximum load condition. Finally, it is concluded that nano-graphene oxide nanoparticles can be introduced as a suitable substitute fuel additive for dairy scum oil biodiesel blends to enhance the overall engine performance and emissions characteristics.

Fuel published new progress about Absorption. 110-42-9 belongs to class esters-buliding-blocks, name is Methyl decanoate, and the molecular formula is C11H22O2, Synthetic Route of 110-42-9.

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

Bryuzgin, Evgeny published the artcileBiodegradation Control of Chitosan Materials by Surface Modification with Copolymers of Glycidyl Methacrylate and Alkyl Methacrylates, SDS of cas: 142-90-5, the main research area is glycidyl methacrylate chitosan biodegradation surface modification.

Chitosan is a promising polymer from natural polysaccharides, which is an environmentally friendly compound from renewable raw materials. Chitosan has biodegradability, biocompatibility, and antibacterial and other activities. In this article, we report the biodegradation control of chitosan materials by use of random copolymers based on glycidyl methacrylate and (fluoro)alkyl methacrylates as surface modifiers. We show that grafting of copolymers allows increasing the hydrophobicity of chitosan materials with initial contact angles up to 114° from 89° for films and up to 154° from 123° for aerogels. We demonstrate that modified aerogels retain contact angles of more than 150° for a long contact time with water while the initial aerogel fully wets for 30 s. The resulting chitosan aerogels have high porosity with a pore size of 100-200 μm, and the pore walls are 0.6-0.7-μm-thick film formations. Our study of lyophilic properties of modified chitosan substrates showed a change in the hydrophobicity of the materials as a function of length of the hydrocarbon radical in the side groups of the (fluoro)alkyl methacrylates in the copolymers. We demonstrate that the rate of biodegradation of the resulting materials decreases with an increase in the number of hydrophobic groups in the modifier. The obtained chitosan materials with hydrophobic coatings have potential as a protective layer for wound dressings with an extended service life.

Fibers and Polymers published new progress about Absorption. 142-90-5 belongs to class esters-buliding-blocks, name is Dodecyl 2-methylacrylate, and the molecular formula is C16H30O2, SDS of cas: 142-90-5.

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

Yang, Ruijie published the artcileThe performance and reaction pathway of δ-MnO2/USY for catalytic oxidation of toluene in the presence of ozone at room temperature, Computed Properties of 140-11-4, the main research area is manganese oxide zeolite toluene catalytic oxidation ozone removal; Catalytic oxidation pathway; Ozone; Toluene; USY; δ-MnO(2).

In this work, a series of δ-MnO2/USY with different contents of δ-MnO2 (0.3 wt%, 1.5 wt%, 3.0 wt%, 10.0 wt%, and 15.0 wt%) were prepared In addition, their performances of the adsorption of toluene, degradation and mineralization of toluene, and removal of ozone (O3) were investigated. The results showed that, among all the samples, 3.0 wt% δ-MnO2/USY displayed the best performance of toluene adsorption, degradation and mineralization. Furthermore, according to the in situ DRIFTS and GC-MS anal., the intermediate byproducts during the toluene degradation progress were ascertained and the possible pathway of catalytic oxidation toluene by δ-MnO2/USY in the presence of O3 was proposed.

Chemosphere published new progress about Absorption. 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

Shang, Hui published the artcileBiomimetic organohydrogel actuator with high response speed and synergistic fluorescent variation, Formula: C16H30O2, the main research area is biomimetic organohydrogel actuator synergistic fluorescent variation.

Current hydrogel-based actuators have achieved rapid development due to their excellent performance such as shape-morphing and color-changing for application in fields such as camouflage, biomimetic soft-robotics and so on. However, it is still challenging to fabricate soft robots with the capability of simultaneous changes in shape and fluorescent color at a fast speed when triggered by one single stimulus. Herein, an anisotropic organohydogel actuator made up of rGO-doped hydrophilic poly(N-isopropylacrylamide) (PNIPAM) network and hydrophobic poly(lauryl methacrylate) (PLMA) network is prepared via a two-step interpenetrating method. Bearing fluorescent monomer N-(4-(1,2,2-triphenylvinyl)phenyl)acrylamide (ATPE) as well as fluorescent ligand 6-acrylamidopicolinic acid (6APA), the PLMA network shows fluorescent changes in color or brightness depending on the presence or absence of Eu3+ ions in response to heat/NIR. In a word, the proposed organohydrogel actuator, which exhibits simultaneous fluorescence color variation and fast morphing in response to one stimulus, provides insights in designing and fabricating novel soft robots.

Chemical Engineering Journal (Amsterdam, Netherlands) published new progress about Absorption. 142-90-5 belongs to class esters-buliding-blocks, name is Dodecyl 2-methylacrylate, and the molecular formula is C16H30O2, Formula: C16H30O2.

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