Category: esters-buliding-blocks

Garnier, Louis; Vidal, Chrystelle; Chinot, Olivier; Cohen-Jonathan Moyal, Elisabeth; Djelad, Apolline; Bronnimann, Charlotte; Bekaert, Lien; Taillandier, Luc; Frenel, Jean-Sébastien; Langlois, Olivier; Colin, Philippe; Menei, Philippe; Dhermain, Frédéric; Carpentier, Catherine; Gerazime, Aurélie; Curtit, Elsa; Figarella-Branger, Dominique; Dehais, Caroline; Ducray, François published the artcile< Characteristics of Anaplastic Oligodendrogliomas Short-Term Survivors: A POLA Network Study.>, Category: esters-buliding-blocks, the main research area is Karnofsky Performance Status; age; anaplastic oligodendroglioma; chemotherapy; proliferation; radiotherapy; seizure; surgery.

BACKGROUND: Anaplastic oligodendrogliomas IDH-mutant and 1p/19q codeleted (AO) occasionally have a poor outcome. Herein we aimed at analyzing their characteristics. METHODS: We retrospectively analyzed the characteristics of 44 AO patients with a cancer-specific survival <5 years (short-term survivors, STS) and compared them with those of 146 AO patients with a survival ≥5 years (classical survivors, CS) included in the POLA network. RESULTS: Compared to CS, STS were older (P = .0001), less frequently presented with isolated seizures (P < .0001), more frequently presented with cognitive dysfunction (P < .0001), had larger tumors (P = .= .003), a higher proliferative index (P = .= .0003), and a higher number of chromosomal arm abnormalities (P = .= .02). Regarding treatment, STS less frequently underwent a surgical resection than CS (P = .= .0001) and were more frequently treated with chemotherapy alone (P = .= .009) or with radiotherapy plus temozolomide (P = .= .05). Characteristics independently associated with STS in multivariate analysis were cognitive dysfunction, a number of mitosis > 8, and the absence of tumor resection. Based on cognitive dysfunction, type of surgery, and number of mitosis, patients could be classified into groups of standard (18%) and high (62%) risk of <5 year survival. CONCLUSION: The present study suggests that although STS poor outcome appears to largely result from a more advanced disease at diagnosis, surgical resection may be particularly important in this population. The oncologist published new progress about 112-63-0. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Category: esters-buliding-blocks.

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

Ho, Junming; Zheng, Jingjing; Meana-Paneda, Ruben; Truhlar, Donald G.; Ko, Eun Jung; Savage, G. Paul; Williams, Craig M.; Coote, Michelle L.; Tsanaktsidis, John published the artcile< Chloroform as a Hydrogen Atom Donor in Barton Reductive Decarboxylation Reactions>, HPLC of Formula: 112-63-0, the main research area is chloroform hydrogen atom donor Barton reductive decarboxylation.

The utility of chloroform as both a solvent and a hydrogen atom donor in Barton reductive decarboxylation of a range of carboxylic acids was recently demonstrated. In the present work, a combination of electronic structure calculations, direct dynamics calculations, and exptl. studies was carried out to investigate how chloroform acts as a hydrogen atom donor in Barton reductive decarboxylations and to determine the scope of this process. The results from this study show that hydrogen atom transfer from chloroform occurs directly under kinetic control and is aided by a combination of polar effects and quantum mech. tunneling. Chloroform acts as an effective hydrogen atom donor for primary, secondary, and tertiary alkyl radicals, although significant chlorination was also observed with unstrained tertiary carboxylic acids.

Journal of Organic Chemistry published new progress about Ab initio methods. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, HPLC of Formula: 112-63-0.

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

Ariba, Houda; Wang, Yanjun; Devouge-Boyer, Christine; Stateva, Roumiana P.; Leveneur, Sebastien published the artcile< Physicochemical Properties for the Reaction Systems: Levulinic Acid, Its Esters, and γ-Valerolactone>, Recommanded Product: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is physicochem property reaction system levulinate ester valerolactone.

The use of biomass, particularly, a second-generation one, as a renewable raw material is crucial to sustain the chem. industry. To favor the development of such processes, one needs to make a cost evaluation, which requires the knowledge of process thermodn. and kinetics. In this paper, measurements of different physicochem. properties (viscosity, d., refractive index, and sp. heat capacity) were done for the systems: hydrogenation of levulinic acid or its esters to γ-valerolactone. From those physicochem. measurements, it was possible to extract the ones of the intermediates and perform a thermodn. model assessment by using Aspen Plus. The Redlich-Kwong-Soave cubic equation of state and Benedict-Webb-Rubin-Starling virial equation of state are suitable to describe these chem. systems.

Journal of Chemical & Engineering Data published new progress about Biomass refining. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Recommanded Product: (9Z,12Z)-Methyl octadeca-9,12-dienoate.

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

Wang, Kai; Jiang, Li; Zhong, Yueyang; Zhang, Yin; Yin, Qichuan; Li, Su; Zhang, Xiaobo; Han, Haijie; Yao, Ke published the artcile< Ferrostatin-1-loaded liposome for treatment of corneal alkali burn via targeting ferroptosis>, Safety of Ethyl 3-amino-4-(cyclohexylamino)benzoate, the main research area is ferrostatin liposome treatment corneal alkali burn targeting ferroptosis; corneal alkali burn; corneal neovascularization; ferroptosis; ferrostatin‐1; liposome.

Alkali burn is a potentially blinding corneal injury. During the progression of alkali burn-induced injury, overwhelmed oxidative stress in the cornea triggers cell damage, including oxidative changes in cellular macromols. and lipid peroxidation in membranes, leading to impaired corneal transparency, decreased vision, or even blindness. In this study, we identified that ferroptosis, a type of lipid peroxidation-dependent cell death, mediated alkali burn-induced corneal injury. Ferroptosis-targeting therapy protected the cornea from cell damage and neovascularization. However, the specific ferroptosis inhibitor ferrostatin-1 (Fer-1) is hydrophobic and cannot be directly applied in the clinic. Therefore, we developed Fer-1-loaded liposomes (Fer-1-NPs) to improve the bioavailability of Fer-1. Our study demonstrated that Fer-1-NPs exerted remarkable curative effects regarding corneal opacity and neovascularization in vivo. The efficacy was comparable to that of dexamethasone, but without appreciable side effects. The significant suppression of ferroptosis (induced by lipid peroxidation and mitochondria disruption), inflammation, and neovascularization might be the mechanisms underlying the therapeutic effect of Fer-1-NPs. Moreover, the Fer-1-NPs treatment showed no signs of cytotoxicity, hematol. toxicity, or visceral organ damage, which further confirmed the biocompatibility. Overall, Fer-1-NPs provide a new prospect for safe and effective therapy for corneal alkali burn.

Bioengineering & Translational Medicine published new progress about Bioavailability. 347174-05-4 belongs to class esters-buliding-blocks, and the molecular formula is C15H22N2O2, Safety of Ethyl 3-amino-4-(cyclohexylamino)benzoate.

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

Kennedy, Kim R.; Turner, John Harvey; MacDonald, William B. G.; Claringbold, Phillip G.; Boardman, Glenn; Ransom, David T. published the artcile< Long-term survival and toxicity in patients with neuroendocrine tumors treated with 177Lu-octreotate peptide radionuclide therapy>, HPLC of Formula: 112-63-0, the main research area is lutetium octreotate anticancer agent radionuclide toxicity neuroendocrine tumor; myelodysplasia; neuroendocrine tumor; peptide receptor radionuclide therapy.

Peptide receptor radionuclide therapy (PRRT) has shown favorable results in neuroendocrine tumors (NETs). Long-term safety and efficacy data for 177Lu-octreotate PRRT, particularly in combination with chemotherapy, is lacking. The authors conducted a retrospective review of the long-term toxicity and survival outcomes of 104 patients with advanced NETs treated on 4 phase 2 clin. trials with Lutetium-177-octreotate (177Lu-octreotate) PRRT, mostly in combination with chemotherapy. Median follow-up was 68 mo, which represents the longest follow-up study of 177Lu-octreotate PRRT for NETs to date. Median progression-free survival (PFS) was 37 mo, and median overall survival (OS) was 71 mo. Five- and 10-yr OS were 62% and 29%, and 5- and 10-yr PFS were 36% and 21%, resp., demonstrating 177Lu-octreotate can provide durable responses. PRRT was well tolerated with 1.9% of patients developing chronic renal impairment and 1% of patients developing long-term thrombocytopenia. Interestingly, there was a relatively high rate of myelodysplasia (MDS)/leukemia (6.7%), possibly attributable to the longer follow-up (with all except 1 case occurring more than 4 years after PRRT treatment) or to the addition of concurrent chemotherapy. Lutetium-177-Octreotate PRRT remains an efficacious and well tolerated treatment in long-term follow-up. For clinicians deciding on the timing of PRRT for individual patients, the 6.7% long-term risk of MDS/leukemia needs to be balanced against the 21% PFS at 10 years.

Cancer (Hoboken, NJ, United States) published new progress about Acute myeloid leukemia. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, HPLC of Formula: 112-63-0.

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

Liu, Jun-bo; Chang, Hanqi; Zhao, Wensi; Liang, Dadong; Tang, Shanshan; Jin, Ruifa published the artcile< Theoretical design and preparation of molecularly imprinted polymers of formaldehyde and acrylamide>, Related Products of 3290-92-4, the main research area is molecularly imprinted acrylamide polymer preparation formaldehyde adsorption.

The B3LYP/6-31G(d,p) level was performed to simulated the formaldehyde (HCHO), a molecularly imprinted self-assembly system with acrylamide (AM) as the functional monomer. HCHO-molecularly imprinted polymers (MIPs) were prepared using thermally initiated precipitation polymerization based on the calculation results. The adsorption, selectivity and stability of HCHO-MIPs were characterised and analyzed. The results revealed that the complex with an orderly arrangement of HCHO and AM had the lowest configurational energy (-109.51 kJ/mol) when the ratio of HCHO and AM was 1:4, and the crosslinking agent was pentaerythritol triacrylate. HCHO-MIPS prepared using HCHO, AM and PETA in the ratio of 1:4:16 had the best imprinting effect under certain conditions: 289-K temperature, 400-mg/L HCHO solution concentration, and 400-min absorption time. The maximum clear adsorption capacity and dissociation-equilibrium constants were 54.67 mg/g and 72.46 mg/L, resp. The pseudo-second-order kinetic equation was used to fit the adsorption capacity. Thermodn. studies showed that the adsorption of HCHO by HCHO-MIPs was an exothermic process. The selectivity study showed that the adsorption capacity of HCHO-MIPs for HCHO was higher than that of benzaldehyde, propionaldehyde and glyoxylic acid, showing a strong specific adsorption capacity. The HCHO-MIPs prepared using this synthetic strategy exhibited better adsorption, selectivity and stability.

Journal of Polymer Research published new progress about Adsorption. 3290-92-4 belongs to class esters-buliding-blocks, and the molecular formula is C18H26O6, Related Products of 3290-92-4.

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

Drews, Janina; Jankowski, Piotr; Hacker, Joachim; Li, Zhenyou; Danner, Timo; Garcia Lastra, Juan Maria; Vegge, Tejs; Wagner, Norbert; Friedrich, K. Andreas; Zhao-Karger, Zhirong; Fichtner, Maximilian; Latz, Arnulf published the artcile< Modeling of electron-transfer kinetics in magnesium electrolytes: Influence of the solvent on the battery performance>, Synthetic Route of 112-63-0, the main research area is electron transfer kinetics magnesium ion secondary battery electrolyte; Computational chemistry; Deposition mechanism; Desolvation; Kinetics; Rechargeable magnesium batteries.

The performance of rechargeable magnesium batteries is strongly dependent on the choice of electrolyte. The desolvation of multivalent cations usually goes along with high energy barriers, which can have a crucial impact on the plating reaction. This can lead to significantly higher overpotentials for magnesium deposition compared to magnesium dissolution In this work we combine exptl. measurements with DFT calculations and continuum modeling to analyze Mg deposition in various solvents. Jointly, these methods provide a better understanding of the electrode reactions and especially the magnesium deposition mechanism. Thereby, a kinetic model for electrochem. reactions at metal electrodes is developed, which explicitly couples desolvation to electron transfer and, furthermore, qual. takes into account effects of the electrochem. double layer. The influence of different solvents on the battery performance is studied for the state-of-the-art magnesium tetrakis(hexafluoroisopropyloxy)borate electrolyte salt. It becomes apparent that not necessarily a whole solvent mol. must be stripped from the solvated magnesium cation before the first reduction step can take place. For Mg reduction it seems to be sufficient to have one coordination site available, so that the magnesium cation is able to get closer to the electrode surface. Thereby, the initial desolvation of the magnesium cation determines the deposition reaction for mono-, tri- and tetraglyme, whereas the influence of the desolvation on the plating reaction is minor for diglyme and THF. Overall, we can give a clear recommendation for diglyme to be applied as solvent in magnesium electrolytes.

ChemSusChem published new progress about Battery electrolytes. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Synthetic Route of 112-63-0.

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

Jiang, Xiuming; Yang, Denghui; Xiang, Guoqiang; Hu, Leqian published the artcile< Determination of cis/trans fatty acid contents in edible oils by 1H NMR spectroscopy in association with multivariate calibration>, Product Details of C19H34O2, the main research area is cis trans fatty acid edible oil NMR spectroscopy calibration.

In this work, cis and trans fatty acid (FA) contents in edible oils was determined using 1H NMR (1H NMR) spectroscopy. The comparison of 1H NMR spectra of edible oil and cis-trans isomerized oil showed that they were different in three regions: (1) 2.880 – 2.650 ppm caused by bis-allylic protons; (2) 2.140 – 1.900 ppm due to allylic protons; and (3) 1.030 – 0.930 ppm due to Me protons of linolenic acyl groups. The 1H NMR signals in these regions were combined with partial least squares method to predict contents of cis/trans fatty acids in edible oils. The results showed that the predicted values were consistent with the gas chromatog.-measured values and had a good linear relationship with a correlation coefficient (R2) of above 0.98. This work demonstrates that 1H NMR spectroscopy was successfully used to determine the composition of both cis and trans fatty acids in edible oils.

Journal of Food Composition and Analysis published new progress about Analysis. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Product Details of C19H34O2.

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

Enguilo Gonzaga, Vania; Romero, Rubi; Gomez-Espinosa, Rosa Maria; Romero, Amaya; Martinez, Sandra Luz; Natividad, Reyna published the artcile< Biodiesel Production from Waste Cooking Oil Catalyzed by a Bifunctional Catalyst>, Recommanded Product: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is biodiesel fuel calcium iron oxide catalyst waste cooking oil.

The objective of this study was to prepare bifunctional catalysts based on iron and CaO and test them in the biodiesel production using waste cooking oil (WCO) as feedstock. Two iron precursors were studied, Fe2O3 and Fe(NO3)3·9H2O. The identified crystalline phases were Ca2Fe2O5 and CaFeO3. Surface morphol. and textural properties (distribution of active species, sp. surface area, size, and pore volume) were also analyzed. Addnl., thermal stability was studied and 800°C was established as the optimum calcination temperature The d. of both acidic and basic sites was higher with the catalyst prepared with Fe2O3 than with that prepared with Fe(NO3)3·9H2O. The latter, however, leads to reach equilibrium in half of the time than with the former. This was ascribed to the ratio of acidic to basic sites, which is higher with the catalyst prepared with the precursor salt. This ratio not only affects the overall cost of the process by affecting the time at which equilibrium is reached but also by dictating the methanol/oil molar ratio at which the equilibrium is reached sooner. The prepared bifunctional catalyst allowed us to produce biodiesel with 90% of Me ester content at atm. pressure, reaction temperature of 60°C, reaction time of 2 h, with 12:1 M ratio of methanol/WCO, 10 wt % of Fe over CaO, and a catalyst loading of 5 wt %. This catalyst can be used at least 3 times. The so-obtained biodiesel met the European norm EN-14214 regarding viscosity and d.

ACS Omega published new progress about Bifunctional catalysts. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Recommanded Product: (9Z,12Z)-Methyl octadeca-9,12-dienoate.

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

Tsamou, Maria; Carpi, Donatella; Pistollato, Francesca; Roggen, Erwin L.; Kelly, Bakulski published the artcile< Sporadic Alzheimer's Disease- and Neurotoxicity-Related microRNAs Affecting Key Events of Tau-Driven Adverse Outcome Pathway Toward Memory Loss>, Application of C19H34O2, the main research area is microRNA tau neurotoxicity memory loss Alzheimers disease; Adverse outcome pathway; Alzheimer’s disease; key events; miRs; neurotoxicity.

A complex network of aging-related homeostatic pathways that are sensitive to further deterioration in the presence of genetic, systemic, and environmental risk factors, and lifestyle, is implicated in the pathogenesis of progressive neurodegenerative diseases, such as sporadic (late-onset) Alzheimers disease (sAD). Since sAD pathol. and neurotoxicity share microRNAs (miRs) regulating common as well as overlapping pathol. processes, environmental neurotoxic compounds are hypothesized to exert a risk for sAD initiation and progression. Literature search for miRs associated with human sAD and environmental neurotoxic compounds was conducted. Functional miR anal. using PathDip was performed to create miR-target interaction networks. The identified miRs were successfully linked to the hypothetical starting point and key events of the earlier proposed tau-driven adverse outcome pathway toward memory loss. Functional miR anal. confirmed most of the findings retrieved from literature and revealed some interesting findings. The anal. identified 40 miRs involved in both sAD and neurotoxicity that dysregulated processes governing the plausible adverse outcome pathway for memory loss. Creating miR-target interaction networks related to pathol. processes involved in sAD initiation and progression, and environmental chem.-induced neurotoxicity, resp., provided overlapping miR-target interaction networks. This overlap offered an opportunity to create an alternative picture of the mechanisms underlying sAD initiation and early progression. Looking at initiation and progression of sAD from this new angle may open for new biomarkers and novel drug targets for sAD before the appearance of the first clin. symptoms.

Journal of Alzheimer’s Disease published new progress about Actin-related protein 2/3 complex ARPC3 Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Application of C19H34O2.

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