Category: esters-buliding-blocks

Fusco, Laura published the artcileSkin irritation potential of graphene-based materials using a non-animal test, Formula: C13H18O3, the main research area is graphene based material skin irritation potential health hazard.

Besides inhalation, skin contact may be considered one of the most relevant exposure routes to graphene-based materials (GBMs). However, very few data on the cutaneous toxicity of these materials are available, so far. This study is focused on skin irritation potential of a panel of GBMs: few-layer graphene (FLG), exfoliated by ball milling of graphite, FLG exfoliated by ultrasonication using sodium dodecyl sulfate (FLG-SDS) or sodium dodecylbenzenesulfonate (FLG-SDBS), CVD-graphene, obtained by chem. vapor deposition, graphene oxide (GO) and reduced GO (rGO). Skin irritation was assessed using the SkinEthic Reconstructed human Epidermis (RhE), following the Organization for Economic Co-operation and Development (OECD) Test Guideline (TG) 439. Even though not validated for nanomaterials, the OCED TG 439 turned out to be applicable also for GBM testing, since no interference with the methylthiazolyldiphenyl-tetrazolium bromide (MTT) reduction, used as a final readout, was found. Furthermore, direct epidermal exposure to powd. GBMs mimics the actual human exposure, avoiding interference by the cell culture medium (protein corona formation). Only GBMs prepared with irritant surfactants (FLG-SDS and FLG-SDBS), but not the others, reduced RhE viability at levels lower than those predicting skin irritation (�0%), suggesting irritant properties.

Nanoscale published new progress about Ball milling. 6259-76-3 belongs to class esters-buliding-blocks, name is Hexyl 2-hydroxybenzoate, and the molecular formula is C13H18O3, Formula: C13H18O3.

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

Li, Yinfeng published the artcileBiodiversity and Oenological Property Analysis of Non-Saccharomyces Yeasts Isolated from Korla Fragrant Pears (Pyrus sinkiangensis Yu), Product Details of C9H18O2, the main research area is biodiversity oenol Saccharomyces yeast Korla Fragrant Pear.

Oenol. yeasts play a critical role in the winemaking process. In this study, the biodiversity of the non-Saccharomyces yeast was analyzed and monitored using high-throughput sequencing and culture-dependent approaches. Oenol. and fermentation characteristics of these native yeasts were further investigated. A total of 241 fungus species and 5 species of culturable non-Saccharomyces yeasts were detected using high-throughput sequencing and culture-dependent approaches, resp. Five strains of aroma-producing yeasts (K4, K14, K19, K21, and K26) were isolated, and their growth characteristics, carbon source utilization, hydrogen sulfide production performance, and β-glucosidase activity were different. The oenol. condition tolerances of most strains were lower than that of com. S. cerevisiae X16. The co-inoculum of these strains and S. cerevisiae X16 regulated the volatile aroma characteristics of the fermented Korla fragrant pear (KFP) fruit wine, enriching and complicating the aroma flavor. Thus, the combined inoculation of these indigenous wine yeasts and S. cerevisiae has some application potential in the production of KFP wine.

Fermentation published new progress about Biodiversity. 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

Tsakanova, Gohar published the artcileTwo-photon imaging of oxidative stress in living erythrocytes as a measure for human aging, SDS of cas: 2044-85-1, the main research area is oxidative stress erythrocyte two photon laser light microscopy.

According to the “”oxidative stress theory”” of aging, this process is accompanied by a progressive and irreversible accumulation of oxidative damage caused by reactive oxygen species (ROS). This, in turn, has a deleterious impact on mol. mechanisms in aging thereby altering the physiol. function of the organism, increasing the risk of different aging-related diseases, as well as impacting the life span. The aim of the current study was to investigate oxidative stress in living red blood cells (RBCs) in human aging as an oxidative stress-related pathol. condition. Two-photon laser scanning and light microscopy techniques were applied to analyze the oxidative stress in RBCs and the cell viability. Spectrophotometric analyzes were performed to determine the percentage of RBC hemolysis, activities of superoxide dismutase and catalase in RBCs, as well as the ferroxidase activities of ceruloplasmin in blood plasma samples. The studies included three human aging groups, young, middle-aged, and elderly. According to the results, the two-photon fluorescence of carboxy-DCFDA, indicating the intensity of oxidative stress, significantly increase in RBCs by the increase of age (P < 0.05), and these intensities are in statistically significant pos. correlation with age (P < 0.001) and a strong neg. correlation (P < 0.05) with the activity of catalase in RBCs and ferroxidase activity of ceruloplasmin in plasma. In conclusion, two-photon fluorescent imaging of oxidative stress in human living RBCs is a valuable and accurate method for the determination of aging processes in humans and can be suggested as a novel indicator for human aging processes in individual aging. Biomedical Optics Express published new progress about Blood plasma. 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, SDS of cas: 2044-85-1.

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

Rajoli, Rajith K. R. published the artcileDose prediction for repurposing nitazoxanide in SARS-CoV-2 treatment or chemoprophylaxis, Recommanded Product: 2-((5-Nitrothiazol-2-yl)carbamoyl)phenyl acetate, the main research area is nitazoxanide dose prediction SARS CoV treatment chemoprophylaxis; COVID-19; SARS-CoV-2; coronavirus; lung; pharmacokinetics.

Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has been declared a global pandemic and urgent treatment and prevention strategies are needed. Nitazoxanide, an anthelmintic drug, has been shown to exhibit in vitro activity against SARS-CoV-2. The present study used physiol. based pharmacokinetic (PBPK) modeling to inform optimal doses of nitazoxanide capable of maintaining plasma and lung tizoxanide exposures above the reported SARS-CoV-2 EC90. A whole-body PBPK model was validated against available pharmacokinetic data for healthy individuals receiving single and multiple doses between 500 and 4000 mg with and without food. The validated model was used to predict doses expected to maintain tizoxanide plasma and lung concentrations above the EC90 in >90% of the simulated population. PopDes was used to estimate an optimal sparse sampling strategy for future clin. trials. The PBPK model was successfully validated against the reported human pharmacokinetics. The model predicted optimal doses of 1200 mg QID, 1600 mg TID and 2900 mg BID in the fasted state and 700 mg QID, 900 mg TID and 1400 mg BID when given with food. For BID regimens an optimal sparse sampling strategy of 0.25, 1, 3 and 12 h post dose was estimated The PBPK model predicted tizoxanide concentrations within doses of nitazoxanide already given to humans previously. The reported dosing strategies provide a rational basis for design of clin. trials with nitazoxanide for the treatment or prevention of SARS-CoV-2 infection. A concordant higher dose of nitazoxanide is now planned for investigation in the seamless phase I/IIa AGILE trial.

British Journal of Clinical Pharmacology published new progress about Blood plasma. 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, Recommanded Product: 2-((5-Nitrothiazol-2-yl)carbamoyl)phenyl acetate.

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

Rasulov, Suleiman M. published the artcileHigh-Temperature and High-Pressure PVT Measurements of the Binary n-Hexane + Methyl Octanoate Mixture near the Critical Point of the Pure Solvent (n-Hexane), Synthetic Route of 111-11-5, the main research area is PVT measurement phase transition hexane mixture methyl octanoate piezometry.

PρT and phase transition properties (PS,ρS,TS) of the dilute binary mixture of n-hexane + Me octanoate (at a concentration of 0.057 mol fraction of Me octanoate) have been studied using the constant-volume piezometer technique. The measurements were performed along 16 liquid, vapor, and near-critical isochores between 32.38 and 615.57 kg·m-3 over a temperature range from 291 to 633 K at pressures up to 16 MPa. Measurements were concentrated in the immediate vicinity of the critical point of pure n-hexane and liquid-gas phase transition points (bubble and dew point curve) in order to study the effect of critical fluctuations in pure n-hexane on the thermodn. properties of the dilute mixture and to closely observe the phase transition changes and precise measurements of the (PS,ρS,TS) and critical point (PC,ρC,TC) data. The measured critical property data for the mixture were used to study the isomorphic critical behavior of strongly (isothermal compressibility KTX and isobaric heat capacity CPX) and weakly (isochoric heat capacity CVX) singular properties along the critical isochore and the critical isotherm. The measured PρT data were also used to estimate the values of phys. meaning (theor. important) parameters, namely, characteristic reduced temperature and d. differences of the mixture Based on the measured critical property data, the value of the Krichevskii parameter Kkr has been estimated, which defines the structural (Nexc) and thermodn. properties of the dilute mixture near the critical point of the pure solvent (n-hexane).

Journal of Chemical & Engineering Data published new progress about Bubble point. 111-11-5 belongs to class esters-buliding-blocks, name is Methyl octanoate, and the molecular formula is C9H18O2, Synthetic Route of 111-11-5.

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

Qian, Xiaoqing published the artcileHair cell uptake of gentamicin in the developing mouse utricle, Computed Properties of 2044-85-1, the main research area is gentamicin uptake utricle hair cell mouse; MET channel; endocytosis; gentamicin; hair cell; utricle.

Intratympanic injection of gentamicin has proven to be an effective therapy for intractable vestibular dysfunction. However, most studies to date have focused on the cochlea, so little is known about the distribution and uptake of gentamicin by the counterpart of the auditory system, specifically vestibular hair cells (HCs). Here, with a combination of in vivo and in vitro approaches, we used a gentamicin-Texas Red (GTTR) conjugate to investigate the mechanisms of gentamicin vestibulotoxicity in the developing mammalian utricular HCs. In vivo, GTTR fluorescence was concentrated in the apical cytoplasm and the cellular membrane of neonatal utricular HCs, but scarce in the nucleus of HCs and supporting cells. Quant. anal. showed the GTTR uptake by striolar HCs was significantly higher than that in the extrastriola. In addition, the GTTR fluorescence intensity in the striola was increased gradually from 1 to 8 days, peaking at 8-9 days postnatally. In vitro, utricle explants were incubated with GTTR and candidate uptake conduits, including mechanotransduction (MET) channels and endocytosis in the HC, were inhibited sep. GTTR uptake by HCs could be inhibited by quinine, a blocker of MET channels, under both normal and stressed conditions. Meanwhile, endocytic inhibition only reduced GTTR uptake in the CoCl2 hypoxia model. In sum, the maturation of MET channels mediated uptake of GTTR into vestibular HCs. Under stressed conditions, MET channels play a pronounced role, manifested by channel-dependent stress enhanced GTTR permeation, while endocytosis participates in GTTR entry in a more selective manner.

Journal of Cellular Physiology published new progress about Cell nucleus. 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, Computed Properties of 2044-85-1.

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

Fiore, Alberto published the artcileActive packaging based on PLA and chitosan-caseinate enriched rosemary essential oil coating for fresh minced chicken breast application, Recommanded Product: Methyl decanoate, the main research area is chicken breast packaging rosemary essential oil PLA chitosan caseinate.

Active packaging systems are considered an effective way to prolong the shelf life of fresh food products. This study compared five different biopolymer films for their ability to delay the lipid oxidation of raw chicken meat. New antioxidant poly lactic acid film was prepared by coating the film surface with chitosan or chitosan/caseinate blend enriched with rosemary essential oil at concentration of 1% and 2%. Films were characterized in terms of microstructure, water vapor permeability, mech. properties, and antioxidant capacity. In vivo study was done using fresh minced chicken meats stored at 4 °C and analyzed after 0, 4, 7, 11, 14, 21 days. Results indicated that water vapor transmission rate was reduced by the presence of the coating and assumed the lowest value (1.23 ± 0.03 x 10-4 g m-2 s-1) with coating enriched with 2% of rosemary essential oils. The films showed an antioxidant capacity of maximum 6% equivalent to the antioxidant capacity of 6,25 μg of REO/mL. Results from in vivo test showed that the active films were able to reduce meat oxidation during storage in anaerobic modified atm. condition: samples packed with active film showed constant malondialdehyde (MDA) and color up to 14 days and reduction of heptanal and ethanol concentration compared to samples packed with control film (72 % and 90 % resp.). Overall, this study has demonstrated that PLA films coated with an active coating are a promising delivery method for providing antioxidant effects in packaging for fresh meat products.

Food Packaging and Shelf Life published new progress about Antioxidants. 110-42-9 belongs to class esters-buliding-blocks, name is Methyl decanoate, and the molecular formula is C11H22O2, Recommanded Product: Methyl decanoate.

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

Tang, Shuqin published the artcileA Cocktail of Industrial Chemicals in Lipstick and Nail Polish: Profiles and Health Implications, Application In Synthesis of 71617-10-2, the main research area is industrial chem lipstick nail polish health exposure risk assessment.

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.

Environmental Science & Technology Letters published new progress about Antioxidants. 71617-10-2 belongs to class esters-buliding-blocks, name is Isopentyl 3-(4-methoxyphenyl)acrylate, and the molecular formula is C15H20O3, Application In Synthesis of 71617-10-2.

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

Sreedevi, Adikay published the artcilePhytochemical analysis and pharmacological evaluation of ethanol extract of fruits of Grewia tiliaefolia for nephroprotective activity, Quality Control of 41114-00-5, the main research area is Grewia fruit extract phytochem nephroprotective.

The present study was undertaken to screen the phytochems. present in fruits of Grewia tiliaefolia and to evaluate the potential role of these fruits in the amelioration of cisplatin-induced nephrotoxicity in male Albino rats. Ethanol extract of Fruits of Grewia tiliaefolia was prepared by hot extraction method. The prepared ethanol extract was subjected to preliminary phytochem. evaluation followed by TLC, HPTLC, HPLC and GC-MS anal. The nephroprotective potential of the extract was screened at 200 and 400mg/kg b. w. in both curative and prophylactic regimens in male Albino rats. Nephrotoxicity was induced by single i.p. injection of cisplatin at a dose of 5 mg/kg b.w. The nephroprotective activity was assessed by determining serum markers, urinary parameters, lipid peroxidation and antioxidant levels and his to pathol. studies in renal tissue. Upon preliminary phytochem. screening, the ethanol extract showed the presence of Proteins, flavonoids, Tannins, Terpenoids. HPTLC anal. resulted in a fingerprint of extract showing the presence of 14 compounds TLC and HPLC revealed the presence of quercetin, and GC-MS anal. showed the presence of 80 different phytochems. Pharmacol. studies revealed that administration of extract significantly attenuated the cisplatin- induced nephrotoxicity remarkably by restoring the biochem. and oxidative stress markers in both curative and prophylactic regimens in dose-dependent manner. Thus, the findings of the present study provided the phytochem. profile and validated the ethnomedicinal use of fruits of Grewia tiliaefolia as a renoprotective agent.

International Journal of Pharmaceutical Sciences and Research published new progress about Antioxidants. 41114-00-5 belongs to class esters-buliding-blocks, name is Ethyl pentadecanoate, and the molecular formula is C17H34O2, Quality Control of 41114-00-5.

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

Elahi, Behrouz published the artcileBio-based synthesis of Nano-Ceria and evaluation of its bio-distribution and biological properties, Recommanded Product: 2′,7′-Dichloro-3-oxo-3H-spiro[isobenzofuran-1,9′-xanthene]-3′,6′-diyl diacetate, the main research area is nano ceria biol Colloidal stability antioxidant property; Antioxidant; Bio-distribution; Cytotoxicity; Green synthesis; Nano-Ceria.

Bio-based synthesis of Nano-Ceria (NC) was performed in Linum usitatissimum L.(Lu) seeds extract as capping agent. Obtained gel was calcined at 400, 500, and 600°C to investigate the effect of temperature on the size and morphol. of the particles. All samples had spherical morphol. which their crystallite size was decreased in higher temperature Products were characterized by TGA/DTA, UV-vis, FESEM, FTIR and XRD. The band gap of the prepared samples was calculated through Tauc plot in the range of 3.2-3.4 eV. The results of MTT assay confirmed that NC has been shown no significant toxicity on A549 cell line. 2′,7′-dichlorofluorescin diacetate (DCFDA) was used to determine antioxidant properties of NC on A549 cell and the results showed that all concentrations of NC could reduce reactive oxygen species (ROS). NC was labeled with technetium (99mTc) for in vivo bio-distribution study in Wistar rat. Radiolabeled NC was stable in different environments of PBS buffer and human serum with radiochem. purity of more than 95% according to the instant thin layer chromatog. (ITLC) method. DLS anal. showed radiolabeled particles had small size and pleasant colloidal stability. Bio-distribution of radiolabeled NC illustrated the highest accumulation in kidneys (1 h: 5.94 ± 0.77%ID/g, 4 h: 10.95 ± 5.99%ID/g, 24 h 7.94 ± 0.36%ID/g). Moreover, low uptake of 99mTc-NC in stomach confirmed the in vivo stability of 99mTc-NC.

Colloids and Surfaces, B: Biointerfaces published new progress about Antioxidants. 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, Recommanded Product: 2′,7′-Dichloro-3-oxo-3H-spiro[isobenzofuran-1,9′-xanthene]-3′,6′-diyl diacetate.

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