Tag: M.W=250-300

Koda, Yuta published the artcileAmphiphilic Poly[poly(ethylene glycol) methacrylate]s with OH Groups in the PEG Side Chains for Controlling Solution/Rheological Properties and toward Bioapplication, Name: Dodecyl 2-methylacrylate, the main research area is hydroxyl group amphiphilic polyethylene glycol methacrylate bioapplication; PEGylation; amphiphilic copolymers; bioapplication; living radical polymerization; poly(ethylene glycol); protein−polymer conjugation.

Poly[poly(ethylene glycol) methacrylate]s with OH groups on the PEG side chains [poly(PEGOHMA)s] were synthesized using ruthenium-catalyzed living radical polymerization (Ru-LRP) to diversify the polymer design of PEGylated methacrylate-based copolymers. Poly(PEGOHMA)s could not be prepared using the approach previously reported for the synthesis of poly[poly(ethylene glycol) Me ether methacrylate] [poly(PEGMA)]; therefore, the polymerization was adapted for poly(PEGOHMA)s. As a result, both homopolymerization and random and block copolymerization of PEGOHMA with other hydrophobic monomers were successfully achieved, resulting in the preparation of amphiphilic random block and star polymers. The solution and bulk properties of PEGOHMA-based (co)polymers were markedly different from those of PEGMA-based (co)polymers. By reacting the OH groups with biotin, protein-poly(PEGOHMA) conjugates were successfully prepared; however, it was not possible to prepare protein-polymer conjugates using terminal biotinylated PEGMA-based copolymers, owing to the steric hindrance of the unreactive PEG side chains.

ACS Applied Bio Materials published new progress about Amphiphiles. 142-90-5 belongs to class esters-buliding-blocks, name is Dodecyl 2-methylacrylate, and the molecular formula is C16H30O2, Name: Dodecyl 2-methylacrylate.

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

Schreur-Piet, Ingeborg published the artcileAmphiphilic Statistical Copolymers from Catalytic Chain Transfer as Reactive Surfactants in Emulsion Polymerization, Application of Dodecyl 2-methylacrylate, the main research area is amphiphilic statistical copolymer chain transfer reactive surfactant emulsion polymerization.

Statistical copolymers of methacrylic acid (MAA) and Me methacrylate (MMA), Bu methacrylate (BMA), or lauryl methacrylate (LMA) were synthesized via cobalt(II)-mediated catalytic chain transfer polymerization (CCTP) and used as macromonomeric stabilizers in the emulsion polymerization of MMA. By varying the composition, length, and concentration of the macromonomers, we were able to tune the particle size, molar mass, and rheol. behavior of the latexes. Most latexes stabilized with macromonomers containing BMA and LMA showed rheol. properties such as small yield stress and shear thinning behavior similar to those of binders for coating applications.

ACS Applied Polymer Materials published new progress about Amphiphiles. 142-90-5 belongs to class esters-buliding-blocks, name is Dodecyl 2-methylacrylate, and the molecular formula is C16H30O2, Application of Dodecyl 2-methylacrylate.

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

Jangizehi, Amir published the artcileDynamics of supramolecular associative polymer networks at the interplay of chain entanglement, transient chain association, and chain-sticker clustering, Product Details of C16H30O2, the main research area is dynamic supramol associative polymer network interplay chain entanglement sticker.

The dynamic mech. properties of supramol. associative polymer networks depend on the average number of entanglements along the network-forming chains, Ne, and on their content of associative groups, f. In addition, there may be further influence by aggregation of the associative groups into clusters, which, in turn, is influenced by the chem. structure of these groups, and again by Ne and f of the polymer. Therefore, the effects of these parameters are interdependent. To conceptually understand this interdependency, we study model networks in which (a) Ne, (b) f, and (c) the chem. structure of the associative groups are varied systematically. Each network is probed by rheol. The clustering of the associative groups is assessed by analyzing the rheol. data at the end range of frequency covered and by comparison of the number of supramol. network junctions with the maximum possible number of binary transient bonds. We find that if the total number of the network junctions, which can be formed either by interchain entanglement or by interchain transient associations, is greater than a threshold of 13, then the likelihood of cluster formation is high and the dynamics of supramol. associative polymer networks is mainly controlled by this phenomenon. © 2019 Wiley Periodicals, Inc. J. Polym. Sci., Part B: Polym. Phys. 2019.

Journal of Polymer Science, Part B: Polymer Physics published new progress about Aggregation. 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

Ohshio, Maho published the artcileSelf-association behavior of cell membrane-inspired amphiphilic random copolymers in water, Category: esters-buliding-blocks, the main research area is amphiphilic random copolymer RAFT polymerization self association; RAFT; amphiphilic copolymer; hydrophobic interaction; phosphorylcholine.

Water-soluble and amphiphilic random copolymers (P(MPC/DMAx)) composed of hydrophilic 2-methacryloyloxyethyl phosphorylcholine (MPC) and hydrophobic n-dodecyl methacrylate (DMA) were prepared via reversible addition-fragmentation chain transfer (RAFT) controlled radical polymerization The compositions of DMA unit (x) in the copolymer were in the range of 0 to 38 unit mol %.The d.p. of P(MPC/DMAx) was adjusted to about 200. Since the monomer reactivity ratios of MPC and DMA are 1.01 and 1.00, resp., ideal free radical copolymerization occurred. In aqueous solutions, interpolymer aggregation occurred due to the hydrophobic pendant n-dodecyl groups. The aggregation number (Nagg) increased with an increasing x. The mobilities of the DMA and MPC pendant groups in aqueous solutions were restricted, as confirmed by 1H NMR relaxation time measurements, because a part of the MPC units were trapped in the hydrophobic microdomain formed from the pendant n-dodecyl groups. The polarity of the hydrophobic microdomain formed from P(MPC/DMA38) in water was similar to that of Et acetate according to fluorescence probe experiments No specific interactions were found in water between P(MPC/DMAx) and bovine serum albumin because the surface of the interpolymer aggregates contained only hydrophilic MPC units.

Polymers (Basel, Switzerland) published new progress about Aggregation. 142-90-5 belongs to class esters-buliding-blocks, name is Dodecyl 2-methylacrylate, and the molecular formula is C16H30O2, Category: esters-buliding-blocks.

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

Shin, Isaac published the artcileViscosifying a Noncovalently Joined Polymer Nanoparticle Solution upon Heating, Formula: C16H30O2, the main research area is hydrogen bond polymethacrylate nanoparticle solution heating aggregation.

We report the synthesis of a series of statistical terpolymer poly[(Me methacrylate)-co-lauryl methacrylate-co-2-((3,5-bis(4-carbamoyl-3-(trifluoromethyl)phenoxy)benzyloxy)carbonylamino)ethyl methacrylate] (P(MMA-co-LMA-co-BMA)) by reversible addition-fragmentation chain transfer polymerization and their aggregation behaviors in solution In toluene, the solution behavior of terpolymer was controlled by the molar fractions of lauryl methacrylate (LMA) and benzamide-containing methacrylate (BMA) in the polymer, which increased solubility and promoted hydrogen bonding between the primary aromatic amides, resp. Temperature-dependent 1H NMR spectroscopy also indicated gradual dissociation of the hydrogen bonds with increasing temperature For the polymer containing 2.7 mol % of LMA and 2.7 mol % of BMA repeating units, we demonstrated that dissolving the polymer in THF as a good solvent and switching the solvent with toluene produced polymer nanoparticles with diameters of several tens of nanometers, as observed by dynamic light scattering. Intramol. hydrogen bonding was dominant and induced the noncovalent chain collapse. When the temperature of the particle dispersion in toluene at a concentration > 30 mg/mL was increased from RT to 50°C, a significant increase in viscosity was observed This behavior was not observed in a toluene solution of poly(Me methacrylate), which showed decreased viscosity at a higher temperature The viscosity increase was accompanied by a decrease in the particle size, and both were attributed to the dissociation of some intramol. hydrogen bonds within the particles, which can increase the number of individual chains in toluene and result in more intermol. interactions.

Macromolecules (Washington, DC, United States) published new progress about Aggregation. 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

Valera, Maria Jose published the artcileWine Aroma Characterization of the Two Main Fermentation Yeast Species of the Apiculate Genus Hanseniaspora, Related Products of esters-buliding-blocks, the main research area is Hanseniaspora apiculate genus wine aroma fermentation yeast species.

Hanseniaspora species are the main yeasts isolated from grapes and grape musts. Regarding genetic and phenotypical characterization, especially fermentative behavior, they can be classified in two technol. clusters: the fruit group and the fermentation group. Among the species belonging to the last group, Hanseniaspora osmophila and Hanseniaspora vineae have been previously isolated in spontaneous fermentations of grape must. In this work, the oenol. aptitudes of the two species of the fermentation group were compared with Saccharomyces cerevisiae and the main species of the fruit group, Hanseniaspora uvarum. Both H. osmophila and H. vineae conferred a pos. aroma to final wines and no sensory defects were detected. Wines fermented with H. vineae presented significantly higher concentrations of 2-phenylethyl, tryptophol and tyrosol acetates, acetoin, mevalonolactone, and benzyl alc. compared to H. osmophila. Sensorial anal. showed increased intensity of fruity and flowery notes in wines vinificated with H. vineae. In an evolutionary context, the detoxification of alcs. through a highly acetylation capacity might explain an adaptation to fermentative environments. It was concluded that, although H. vineae show close alc. fermentation adaptations to H. osmophila, the increased activation of phenylpropanoid metabolic pathway is a particular characteristic of H. vineae within this important apiculate genus.

Fermentation published new progress about Acetylation. 41114-00-5 belongs to class esters-buliding-blocks, name is Ethyl pentadecanoate, and the molecular formula is C17H34O2, Related Products of esters-buliding-blocks.

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

Liu, Xin published the artcileEco-friendly quantum dots for liquid luminescent solar concentrators, Category: esters-buliding-blocks, the main research area is ecofriendly quantum dot liquid luminescent solar concentrator.

Luminescent solar concentrators (LSCs) are a promising solution to reduce the cost of integrated photovoltaic (PV) cells. Colloidal quantum dots (QDs) were excellent candidates as a new type of absorber/emitter in LSCs, due to their size-tunable absorption and emission, high photoluminescence quantum yield (PLQY) and structure-engineered large Stokes shift. However, to date, the majority of QD-based LSCs employ QDs containing heavy-metal (e.g. Cd or Pb) elements, which limits the potential commercialization of LSCs. Herein, we propose the synthesis of green transition metal ion-doped semiconductor QDs such as Cu-doped ZnInSe QDs and their use as luminophores in LSCs. By tailoring the amount of Cu doping, it was possible to tune the photoluminescent (PL) emissions over the whole visible spectral window and simultaneously enlarge the Stokes shift, reaching a PLQY of 63%. Furthermore, a comparative study between polymer and liquid solar concentrators showed that, under optimal conditions, it is possible to obtain a green, heavy metal free liquid QD-based LSC with a high optical efficiency of over 3.5%. This result is more than two times higher than that of a polymer LSC (ηopt = 1.75%, G = 10), which could be ascribed to the reduced reabsorption losses and avoided energy loss by surface and internal defects resulting from polymerization The waveguides for liquid LSCs could be recycled for tuning the concentrations and changing various luminophores which makes the liquid LSCs cost-effective and environmentally friendly. The success of eco-friendly Cu doped Zn-In-Se QDs for liquid LSCs provides a platform of more efficient and environmentally friendly solar energy harvest systems. In addition, the comparative study between liquid and polymer waveguides provides an opportunity to optimize LSC performance.

Journal of Materials Chemistry A: Materials for Energy and Sustainability published new progress about Luminescence. 142-90-5 belongs to class esters-buliding-blocks, name is Dodecyl 2-methylacrylate, and the molecular formula is C16H30O2, Category: esters-buliding-blocks.

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

Ji, Xueao published the artcileInitial fungal diversity impacts flavor compounds formation in the spontaneous fermentation of Chinese liquor, Name: Ethyl pentadecanoate, the main research area is sequence Aspergillus Chinese liquor fermentation flavor acetic acid nonalactone; Fermented food; Metabolic function; Metabolic succession; Microbial diversity; Microbial succession; Succession distance.

Microbiota plays an important role in flavor compounds formation during food fermentation However, the role of initial microbial diversity in regulating flavor compounds formation is still unclear. Here, we used high-throughput amplicon sequencing and structural equation modeling to reveal the effect of initial microbial diversity on final metabolic diversity in Chinese sesame flavor-type liquor fermentation The results showed that the initial fungal diversity pos. impacted fungal succession (R = 0.74, P < 0.001). The longest fungal succession distance (0.054) was observed at the highest initial fungal diversity (38.580). Moreover, fungal succession pos. affected metabolic succession (R = 0.71, P < 0.001), and the metabolic succession pos. promoted the metabolic diversity (R = 0.68, P < 0.001). In addition, the longest succession distance of fungi (0.054) led to the longest succession distance of metabolites (0.065), and resulted in the highest metabolic diversity (0.409), that was significantly higher than the lowest metabolic diversity (0.219) (P < 0.05). Finally, a simulative fermentation experiment verified the significant and pos. effect of initial fungal diversity on final metabolic diversity (R2 = 0.52, P < 0.05) in liquor fermentation These results indicated the importance of initial fungal diversity for promoting flavor compounds formation. This work provides insights into improving flavor compounds formation by controlling initial fungal diversity in food fermentation, and it will be beneficial for improving the quality of fermented foods. Food Research International published new progress about Acetobacter. 41114-00-5 belongs to class esters-buliding-blocks, name is Ethyl pentadecanoate, and the molecular formula is C17H34O2, Name: Ethyl pentadecanoate.

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

Dutta, Kingshuk published the artcileSymbiotic Self-Assembly Strategy toward Lipid-Encased Cross-Linked Polymer Nanoparticles for Efficient Gene Silencing, Quality Control of 142-90-5, the main research area is self assembly lipid crosslinking polymer nanoparticle gene silencing; DOPE; MDR1; PLK1; eGFP; gene silencing; noncationic delivery agent; random copolymer; siRNA delivery; symbiotic self-assembly; zwitterionic lipids.

A novel “”symbiotic self-assembly”” strategy that integrates the advantages of biocompatible lipids with a structurally robust polymer to efficiently encapsulate and deliver siRNAs is reported. The assembly process is considered to be symbiotic because none of the assembling components are capable of self-assembly but can form well-defined nanostructures in the presence of others. The conditions of the self-assembly process are simple but have been chosen such that it offers the ability to arrive at a system that is noncationic for mitigating carrier-based cytotoxicity, efficiently encapsulate siRNA to minimize cargo loss, be effectively camouflaged to protect the siRNA from nuclease degradation, and efficiently escape the endosome to cause gene knockdown. The lipid-siRNA-polymer (L-siP) nanoassembly formation and its disassembly in the presence of an intracellular trigger have been extensively characterized exptl. and through computational modeling. The complexes have been evaluated for the delivery of four different siRNA mols. in six different cell lines, where an efficient gene knockdown is demonstrated. The reported generalized strategy has the potential to make an impact on the development of a safe and effective delivery agent for RNAi-mediated gene therapy that holds the promise of targeting several hard-to-cure diseases.

ACS Applied Materials & Interfaces published new progress about Gene therapy. 142-90-5 belongs to class esters-buliding-blocks, name is Dodecyl 2-methylacrylate, and the molecular formula is C16H30O2, Quality Control of 142-90-5.

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

Hayashi, Naoki published the artcileSolubility of thermostable alkyl phosphate ester copper complexes in poly(alkyl methacrylate) for near-infrared-absorbing dyes, HPLC of Formula: 142-90-5, the main research area is solubility alkylphosphate ester copper polyalkyl methacrylate IR absorbing dye.

To realize thermoplastic near-IR-absorbing resin materials with weak absorbance in the visible region, the solubility of thermostable alkyl phosphate ester copper complexes in poly(alkyl methacrylate) was investigated for their use as near-IR-absorbing dyes. C4-C12 alkyl phosphate ester copper complexes were synthesized and mixed with Bu methacrylate, 2-ethylhexyl methacrylate, and lauryl methacrylate at 0.10 mol/g copper ion in the monomer solution The obtained solutions were polymerized to prepare 3 mm resin plates, and the plate transparency was evaluated by a haze meter. 2-Ethylhexyl methacrylate solutions of the 2-ethylhexyl phosphate copper complex and the isodecyl phosphate copper complex maintained their transparency even after polymerization, so these two copper complexes show good solubility in poly(2-ethylhexyl methacrylate). Both of the resin plates have >80% visible light transmittance and <50% solar direct transmittance. Thus, these resin materials are suitable as window materials that require heat-shielding properties and transparency. Polymer Journal (Tokyo, Japan) published new progress about Heat shields. 142-90-5 belongs to class esters-buliding-blocks, name is Dodecyl 2-methylacrylate, and the molecular formula is C16H30O2, HPLC of Formula: 142-90-5.

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