Tag: M.W=200-250

Gran, Evan Rizzel published the artcileHuman astrocytes and astrocytoma respond differently to resveratrol, Computed Properties of 23783-42-8, the main research area is resveratrol human astrocyte astrocytoma; Astrocytes; Astrocytoma; Glutathione; Miktoarm polymers; Reactive oxygen species; Resveratrol.

A fundamental problem in oncol. is that anticancer chemotherapeutics kill both cancer and healthy cells in the surrounding tissues. Resveratrol is a natural antioxidant with intriguing and opposing biol. properties: it reduces viability of some cancer cells but not of non-transformed ones (in equimolar concentrations). Therefore, we examined resveratrol in human non-transformed primary astrocytes and astrocytoma. Resveratrol reduced reactive oxygen species in astrocytes, but not in astrocytoma. Such cell-type dependent response is particularly evident with analyses at the single cell level showing clear population difference in high and low glutathione levels. Due to resveratrol′s poor aqueous solubility that limits its use in clinics, we incorporated it into stimulus-responsive micelles assembled from miktoarm polymers. This could be an attractive chemotherapeutic delivery strategy in nano-oncol. As a proof of principle, we show that these formulations containing resveratrol markedly decrease astrocytoma viability, particularly in combination with temozolomide, a first line chemotherapeutic for astrocytoma.

Nanomedicine (New York, NY, United States) published new progress about Antioxidants. 23783-42-8 belongs to class ethers-buliding-blocks, name is 2,5,8,11-Tetraoxatridecan-13-ol, and the molecular formula is C9H20O5, Computed Properties of 23783-42-8.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Yang, Yuanying published the artcileHigh Active Magnesium Trifluoromethanesulfonate-Based Electrolytes for Magnesium-Sulfur Batteries, Recommanded Product: 2,5,8,11,14-Pentaoxapentadecane, the main research area is high active magnesium trifluoromethanesulfonate electrolyte magnesium sulfur battery; anthracene; electrolytes; magnesium−sulfur batteries; rechargeable magnesium batteries; trifluoromethanesulfonate.

The shortage of high-performance and easily prepared electrolyte has hindered the progress of rechargeable magnesium-sulfur (Mg-S) batteries. In this paper, we develop a new electrolyte based on Mg(CF3SO3)2-AlCl3 dissolved in THF and tetraglyme mixed solvents. Mg(SO3CF3)2 as an Mg2+ source is nonnucleophilic, easy to handle, and much cheaper than Mg(TFSI)2 (TFSI = bis(trifluoromethanesulfonyl)imide). After modification with anthracene (π stabilizing agent) as a coordinating ligand to stabilize the Mg2+ ions and MgCl2 to improve the interface properties by accelerating the reaction of Mg(CF3SO3)2 with AlCl3, the electrolyte exhibits a low overpotential for overall Mg deposition and dissolution, moderate anodic stability (3.25 V on Pt, 2.5 V on SS, 2.0 V on Cu, and 1.85 V on Al, resp.), and a suitable ionic conductivity (1.88 mS cm-1). More importantly, this electrolyte modulated by Li-salt additives exhibits good compatibility with S cathode and can be applicable for Mg-S batteries. The rational formulation of the new electrolyte could provide a new avenue for simply prepared Mg electrolytes of Mg-S and rechargeable magnesium batteries.

ACS Applied Materials & Interfaces published new progress about Ball milling. 143-24-8 belongs to class ethers-buliding-blocks, name is 2,5,8,11,14-Pentaoxapentadecane, and the molecular formula is C10H22O5, Recommanded Product: 2,5,8,11,14-Pentaoxapentadecane.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Go, Wooseok published the artcileInvestigation on the Structure and Properties of Na3.1Zr1.55Si2.3P0.7O11 as a Solid Electrolyte and Its Application in a Seawater Battery, Recommanded Product: 2,5,8,11,14-Pentaoxapentadecane, the main research area is sodium superionic conductor solid electrolyte seawater battery; NASICON; ceramic; ionic conductivity; seawater battery; solid electrolyte.

The ionic conductivity, bend strength, and electrochem. performance in a seawater battery (SWB) of an Na3.1Zr1.55Si2.3P0.7O11 (vA-NASICON) solid electrolyte were compared to those of Na3Zr2Si2PO12 (H-NASICON). vA-NASICON exhibited three times higher total ionic conductivity (8.6 x 10-4 S/cm) than H-NASICON (2.9 x 10-4 S/cm). This is due to the higher bulk ionic conductivity and lower grain boundary resistance of vA-NASICON. The higher bulk conductivity of vA-NASICON is a result of its higher Na content, leading to a larger concentration of charge carriers and/or the formation of a higher conductive rhombohedral phase. The lower grain boundary resistance of vA-NASICON is a result of its larger grain size and reduced ZrO2 content. The bend strength of vA-NASICON (95 MPa) was 30% higher than that of the H-NASICON ceramic. The higher bend strength of vA-NASICON was attributed to its reduced ZrO2 secondary phase (1.1 vol %) compared to that of H-NASICON (2.6 vol %). When the vA-NASICON ceramic was tested in the SWB as a solid electrolyte, an 8.27% improved voltage efficiency and 81% higher power output were demonstrated, compared to those of H-NASICON, as a result of its higher total ionic conductivity and mech. strength. At the same time, the vA-NASICON membrane revealed comparable cycle life (1000 h) to that of H-NASICON. These results suggest that vA-NASICON can be a better alternative than H-NASICON for use in the SWB.

ACS Applied Materials & Interfaces published new progress about Ball milling. 143-24-8 belongs to class ethers-buliding-blocks, name is 2,5,8,11,14-Pentaoxapentadecane, and the molecular formula is C10H22O5, Recommanded Product: 2,5,8,11,14-Pentaoxapentadecane.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Kucuk, Asuman Celik published the artcileLow-cost fluoride source for organic liquid electrolyte-based fluoride shuttle battery, Quality Control of 143-24-8, the main research area is fluoride shuttle battery organic liquid electrolyte defluorination.

The effects of using low-cost inorganic fluoride salts (i.e., KF or NaF) as fluoride sources in fluoride shuttle batteries (FSBs) on the electrochem. compatibility of BiF3 electrodes are investigated herein. The preparation of electrolytes containing saturated KF or NaF and 0.5 M 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine (DiOB-Py) in G4 is described. For Py/NaF/G4, the discharge and charge reactions of BiF3 were hindered because of the low solubility of NaF as well as the low ionic conductivity of the electrolyte. However, inductively coupled plasma mass spectrometry (ICP-MS) anal. revealed that the solubility of KF in Py/KF/G4 was moderate and the ionic conductivity of Py/KF/G4 was promising. Higher oxidation and reduction peaks observed in the cyclic voltammograms of Py/KF/G4 than those of Py/G4 and Py/NaF/G4 are attributed to the enhanced electrochem. activity of the former. Consequently, the BiF3/C nanocomposite electrode exhibits good cycling capability in Py/KF/G4, with initial discharge/charge capacities of 316/218 mAh g-1, resp. Moreover, the ICP-MS and Raman spectroscopy analyses revealed that defluorination reactions of BiF3 occur via a direct desorption mechanism. Py/KF/G4 is the first effective electrolyte based on a low-cost inorganic salt. FSBs exhibit improved performance in Py/KF/G4 compared with CsF salt systems, which warrants further investigation.

Journal of the Electrochemical Society published new progress about Ball milling. 143-24-8 belongs to class ethers-buliding-blocks, name is 2,5,8,11,14-Pentaoxapentadecane, and the molecular formula is C10H22O5, Quality Control of 143-24-8.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Liu, Xiao published the artcileInhibition of Discharge Side Reactions by Promoting Solution-Mediated Oxygen Reduction Reaction with Stable Quinone in Li-O2 Batteries, Quality Control of 143-24-8, the main research area is lithium oxygen battery quinone redox mediator oxygen reduction reaction; Li2O2; lithium−oxygen batteries; oxygen reduction reaction; quinone; redox mediator; solution mediated.

Aprotic lithium-oxygen (Li-O2) batteries with an ultrahigh theor. energy d. have great potential in rechargeable power supply, while their application still faces several challenges, especially poor cycle stability. To solve the problems, one of the effective strategies is to inhibit the generation of the LiO2 intermediate produced via a surface-mediated oxygen reduction reaction (ORR) pathway, which is an important species inducing byproduct generation and low cell cyclic stability. Herein, a series of quinones and solid materials serve as the solution-mediated and surface-mediated ORR catalysts, and it was found that the generation of LiO2 and byproducts from solid catalysts was inhibited by quinones. Among the studied quinones, benzo[1,2-b:4,5-b’]dithiophene-4,8-dione, a quinone mol. with the advantage of a highly sym. planar and conjugated structure and without α-H, exhibits high redox potential, diffusion coefficient, and electrochem. stability, and consequently the best ORR activities and the capability to inhibit byproduct generation. It indicated that the increase of the solution-mediated ORR pathway plays an important role in restraining the discharging side reaction, substantially improving cell cycle stability and capacity. This study provides the theor. and exptl. basis for better understanding the ORR process of Li-O2 batteries.

ACS Applied Materials & Interfaces published new progress about Carbon paper. 143-24-8 belongs to class ethers-buliding-blocks, name is 2,5,8,11,14-Pentaoxapentadecane, and the molecular formula is C10H22O5, Quality Control of 143-24-8.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Mukherjee, Anurag published the artcileUltrathin Two Dimensional (2D) Supramolecular Assembly and Anisotropic Conductivity of an Amphiphilic Naphthalene-Diimide, Application In Synthesis of 23783-42-8, the main research area is supramol structure self assembly naphthalene diimide chromophore.

Two-dimensional (2D)-supramol. assemblies of π-conjugated chromophores are relatively less common compared to a large number of recent examples on their low dimensional (0D or 1D) assemblies or 3D architectures. This article reports a rational design for the 2D supramol. assembly of an amphiphilic core-substituted naphthalene-diimide derivative (cNDI-1). The building block contains a naphthalene-diimide (NDI) chromophore, sym. substituted with two dodecyl chains from the aromatic core while the imide positions are functionalized with two hydrophilic wedges containing oligo-oxyethylene chains. In water, it exhibits entropically favorable self-assembly with a critical aggregation concentration of 1.5 x 10-5 M and a lower critical solution temperature of 55°C. The UV/vis absorption spectrum in water shows bathochromically shifted absorption bands compared to that of the monomeric dye in THF, indicating offset π-stacking among the NDI chromophores. C-H sym. and asym. stretching frequencies in the FT-IR spectrum support the presence of organized hydrocarbon chains in trans conformation in the self-assembled state, similar to that in the crystalline n-alkanes, which is further supported by studying the general polarization (GP) values of a noncovalently entrapped Laurdan dye. The at. force microscopy (AFM) image shows the formation of ultrathin (height < 2.0 nm) ribbons for the spontaneously assembled sample which eventually produces a large-area 2D nanosheet by the lateral organization. The powder X-ray diffraction pattern of the drop-casted film, prepared from the preformed aggregates, reveals sharp peaks that indicate a crystalline lamellar packing along the direction of the 2D growth. Differential scanning calorimetry trace shows the melting of the crystalline alkyl chain domain at T > 75°C, which destroys the 2D assembly. Local-scale photoconductivity of the ordered 2D assembly, studied by the flash-photolysis time-resolved microwave conductivity (FP-TRMC) technique, reveals an anisotropic conductivity with ~3 times larger conductivity along the parallel direction compared to that along the perpendicular one.

Langmuir published new progress about Chromophores. 23783-42-8 belongs to class ethers-buliding-blocks, name is 2,5,8,11-Tetraoxatridecan-13-ol, and the molecular formula is C9H20O5, Application In Synthesis of 23783-42-8.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Wang, Shixue published the artcileSynthesis of Y-Shaped OEGylated Poly(amino acid)s: The Impact of OEG Architecture, Computed Properties of 23783-42-8, the main research area is PEGylation polyamino acid glutamic structure.

OEGylation is an attractive approach to modifying poly(amino acid)s. OEG conjugation improves water-solubility of poly(amino acid)s, and confers possible thermal-responsive functionality for the conjugated poly(amino acid)s. Nevertheless, the impact of OEG architecture and the manner in which the OEG moiety interferes with the performances of poly(amino acid)s remain a work in progress. In this study, a series of new linear and Y-shaped OEG-substituted poly(glutamic acid)s were designed and synthesized. It is found that the thermoresponsive behavior of OEGylated poly(glutamic acid)s experiences steric repulsion effect, the strengths of which are architecture and length-dependent, and grows pronounced only when the number of the OEG units is ≥6. Notably, the Y-shaped architecture is able to stabilize the helicity of poly(glutamic acid) backbones, while maintaining higher α-helical conformation than its linear counterparts. In sum, our result indicate that Y-shaped architecture is more appropriate toward OEGylating poly(amino acid)s for biomedical applications.

Biomacromolecules published new progress about Conformation. 23783-42-8 belongs to class ethers-buliding-blocks, name is 2,5,8,11-Tetraoxatridecan-13-ol, and the molecular formula is C9H20O5, Computed Properties of 23783-42-8.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Varela-Aramburu, Silvia published the artcileIntroducing Hyaluronic Acid into Supramolecular Polymers and Hydrogels, Synthetic Route of 23783-42-8, the main research area is hyaluronic acid supramol polymer hydrogel functional biomaterial.

The use of supramol. polymers to construct functional biomaterials is gaining more attention due to the tunable dynamic behavior and fibrous structures of supramol. polymers, which resemble those found in natural systems, such as the extracellular matrix. Nevertheless, to obtain a biomaterial capable of mimicking native systems, complex biomols. should be incorporated, as they allow one to achieve essential biol. processes. In this study, supramol. polymers based on water-soluble benzene-1,3,5-tricarboxamides (BTAs) were assembled in the presence of hyaluronic acid (HA) both in solution and hydrogel states. The coassembly of BTAs bearing tetra(ethylene glycol) at the periphery (BTA-OEG4) and HA at different ratios showed strong interactions between the two components that led to the formation of short fibers and heterogeneous hydrogels. BTAs were further covalently linked to HA (HA-BTA), resulting in a polymer that was unable to assemble into fibers or form hydrogels due to the high hydrophilicity of HA. However, coassembly of HA-BTA with BTA-OEG4 resulted in the formation of long fibers, similar to those formed by BTA-OEG4 alone, and hydrogels were produced with tunable stiffness ranging from 250 to 700 Pa, which is 10-fold higher than that of hydrogels assembled with only BTA-OEG4. Further coassembly of BTA-OEG4 fibers with other polysaccharides showed that except for dextran, all polysaccharides studied interacted with BTA-OEG4 fibers. The possibility of incorporating polysaccharides into BTA-based materials paves the way for the creation of dynamic complex biomaterials.

Biomacromolecules published new progress about Crosslinking. 23783-42-8 belongs to class ethers-buliding-blocks, name is 2,5,8,11-Tetraoxatridecan-13-ol, and the molecular formula is C9H20O5, Synthetic Route of 23783-42-8.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Kikuchi, Arizumi published the artcileEvaluation of the efficacy of various reagents in improving microRNA extraction, SDS of cas: 143-24-8, the main research area is efficacy formalin fixation paraffin embedding microRNA extraction; Efficacy; RNA extraction; formalin fixation and paraffin embedding; microRNA; quantitative real-time reverse transcription PCR; stem-loop RT primer.

Background: MicroRNA has received considerable attention in the clin. context, and attempts are being made to use microRNA in clin. diagnosis. However, adequate quantities of microRNA required for anal. are challenging to isolate. We tested the effect of various reagents in improving microRNA extraction and compared their efficacy to that of a com. available extraction kit (HighPure miRNA isolation kit, Roche). Methods: We used the synthetic oligonucleotide miR-21 and formalin-fixed, paraffin-embedded (FFPE) tissue sections from colon cancer samples (n = 10). We tested increasing volumes (100-600μL) of 1,4-dioxane, 2-butanol, 2-propanol, acetonitrile, polyethylene glycol (PEG) 600, PEG 1000, PEG 1540, PEG 2000, tetraethylene glycol di-Me ether (TDE), and THF, instead of the binding enhancer solution provided in the kit. MiR-21 anal. was performed via stem-loop RT-qPCR using Universal ProbeLibrary probe (Roche). Results: The optimum amount of each enhancement solution was 200-500μL. We obtained ΔCp values of optimum addnl. volume for each solution from 1.04 to 2.50 and compared these with those obtained using the com. available kit. PEG 1540 and 2000 produced superior reactivity with minimal addition For FFPE tissue samples, addition of the enhancement solutions PEG 1540 and 2000 resulted in mean crossing point values of 18.15 ± 2.26 and 17.73 ± 3.26, resp. We obtained a crossing point value of 20.56 ± 4.26 (mean ± SD) using the com. available kit. Conclusions: The tested enhancer reagents, which are relatively readily available and easy to use, can improve microRNA extraction efficacy of a com. available kit.

Annals of Clinical Biochemistry published new progress about Colon neoplasm. 143-24-8 belongs to class ethers-buliding-blocks, name is 2,5,8,11,14-Pentaoxapentadecane, and the molecular formula is C10H22O5, SDS of cas: 143-24-8.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Celik Kucuk, Asuman published the artcileFluoride shuttle batteries: On the performance of the BiF3 electrode in organic liquid electrolytes containing a mixture of lithium bis(oxalato)borate and triphenylboroxin, Quality Control of 143-24-8, the main research area is lithium bisoxalato borate triphenylboroxin bismuth trifluoride electrode liquid electrolytes.

In a typical organic liquid electrolyte-based fluoride shuttle battery (FSB), a high concentration of a boron-based anion acceptor (AA) capable of binding specific anions is required to provide a sufficient amount of dissolved fluoride salt. The tetraglyme (G4)-based electrolyte system (LiBOB0.25/TPhBX0.25/sat_CsF/G4) containing equal concentrations of LiBOB, TPhBX, and saturated cesium fluoride (CsF) was prepared The potential effects of reducing the amount of the AA and using a mixture of LiBOB and TPhBX on the electrochem. compatibility of the BiF3 electrode were investigated through cyclic voltammetry, charge-discharge tests, and a.c. impedance measurements. The potential advantages of using the LiBOB/TPhBX mixture as an electrolyte additive include the fact that it increases ionic conductivity, widens the cathodic and anodic stability window, and enhances the electrochem. performance of the BiF3 pos. electrode. Moreover, according to Raman microscopy, the direct insertion mechanism was found to be predominant for the FSB reaction mechanism of BiF3 microparticles in LiBOB0.25/TPhBX0.25/sat_CsF/G4. These improvements can be attributed to the increase in fluorine anion mobility, which occurs when the cesium cation mobility is reduced; this, in turn, is a result of the stabilization of the cesium cation due to the interaction between LiBOB and TPhBX.

Solid State Ionics published new progress about Defluorination. 143-24-8 belongs to class ethers-buliding-blocks, name is 2,5,8,11,14-Pentaoxapentadecane, and the molecular formula is C10H22O5, Quality Control of 143-24-8.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem