Tag: M.W=250-300

Gavril, Georgiana-Luminita published the artcileInfluence of medicinal and aromatic plants into risk assessment of a new bioactive packaging based on polylactic acid (PLA), Name: Ethyl pentadecanoate, the main research area is Melissa Salvia leaf bioactive packaging polylactic acid; Active packaging; Lemon balm; Migration; Polylactic acid; Risk assessment; Sage.

A new biodegradable antioxidant active packaging for food applications based on antioxidants from medicinal and aromatic plants incorporated into a polylactic acid matrix was designed and developed. Melt blending processing technique was applied to prepare polylactic acid films loaded by sage and lemon balm leaves. Antioxidant properties of developed active films were investigated using the following methods- 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid), 2,2-diphenyl-1-(2,4,6-trinitrophenyl)hydrazyl and a home-made generator of hydroxyl radicals. In addition, reducing power and total phenolic content of polylactic acid films were checked. The results of antioxidant capacity showed that percentage of hydroxylation for active film with lemon balm and sage was 55.5% ± 0.1% and 67.4% ± 0.3%, resp. The reducing power of active films increased 8 times in comparison to the blank samples. Moreover, extensive investigation of influence of sage and lemon balm leaves on material safety and type of migrants was performed using migration assays. The composition of both non-volatile and volatile compounds of different active packaging films was compared with neat polylactic acid film. Three different food simulants such as 95% (volume/volume) ethanol, 10% (volume/volume) ethanol and 3% (w/v) acetic acid were checked. It was shown that the addition of sage and lemon balm leaves into a polylactic acid structure decreased the migration of both linear and cyclic polylactic acid oligomers, currently not legislated by European Union. Besides, total absence or decrease of migration of volatile compounds were observed when using the active films. Both thermal and mech. properties of films were also evaluated.

Food and Chemical Toxicology published new progress about Antioxidants. 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

Zhang, Xiaokang published the artcileEnhanced the effects on improving the cold flow properties and oxidative stability of diesel-biodiesel blends by grafting antioxidant on PMA type pour point depressant, Application of Dodecyl 2-methylacrylate, the main research area is polymethacrylate diesel biodiesel blend oxidative stability pour point depressant.

The commercialization and popularization of biodiesel are mainly restricted by the utilization in cold areas and long-term storage due to the poor low-temperature fluidity and oxidation stability. In order to synchronously improve the low-temperature fluidity and oxidation stability of biodiesel, a bifunctional polymethacrylate (PMA) type copolymer was synthesized by grafting amine antioxidant 1-phenylnaphthylamine onto PMA originally. The grafted copolymers showed excellent performance in reducing the cold filter plugging point (CFPP) and pour point (PP) of B20 (20 vol% soybean biodiesel +80 vol% diesel fuel) and the maximum reduction were 13 and 10°C resp. at the addition of 1500 ppm, which exhibited lower values of 5-8°C and 4-6°C resp. than un-grafted copolymers. The induction period (IP) of B20 treated with 2000 ppm of grafted copolymers was prolonged by 17 h compared with pure B20. In addition, the attenuation of the cold flow properties of B20 samples during the oxidation process was studied, and the mechanism of bifunctional copolymer to improve the properties of B20 was explored.

Fuel Processing Technology published new progress about Antioxidants. 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

Zhang, Yulin published the artcileBody temperature triggered customized patterned thermo-sensitive hydrogel for information storage and display, Recommanded Product: Dodecyl 2-methylacrylate, the main research area is body triggered thermo sensitive hydrogel information storage display polyacrylic.

With the rapid development of mobile networks and smartphones, quick response (QR) code has been more and more applied to various fields. Many individuals also have a QR code containing their own information. But because of its low cost and easy imitation, the QR code not only facilitated people’s life but also brought the risk of revealing personal privacy. Therefore, it is very necessary to improve the security of the QR code by some simple encryption methods. Herein, by combining self-healing hydrogel and thermos-sensitive hydrogel, multifunctional dual network hydrogel with good mech. properties, self-healing ability, and fast temperature sensitivity was synthesized. Moreover, customized patterned thermos-sensitive hydrogels can be obtained by the simple assembly. And the patterns can be triggered by human body temperature and disappeared after cooling at room temperature Based on these performances, a QR code hydrogel with low cost, accessibility, durability and security features was fabricated for the storage and display of information. And this simple strategy is of universal significance for the synthesis of multifunctional and high-performance hydrogels.

Polymer published new progress about Freeze drying. 142-90-5 belongs to class esters-buliding-blocks, name is Dodecyl 2-methylacrylate, and the molecular formula is C16H30O2, Recommanded Product: Dodecyl 2-methylacrylate.

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

Kuramochi, Takahiro published the artcileDiscovery of an N-(2-aminopyridin-4-ylmethyl)nicotinamide derivative: a potent and orally bioavailable NCX inhibitor, HPLC of Formula: 639091-75-1, the main research area is aminopyridinyl nicotinamide preparation sodium calcium exchanger SAR.

Ca2+ overload in myocardial cells is responsible for arrhythmia. Sodium-calcium exchanger (NCX) inhibitors are more effective than sodium-hydrogen exchanger (NHE) inhibitors with regard to modulation of Ca2+ overload, because NCX inhibitors can directly inhibit the influx of Ca2+ into cells. NCX is an attractive target for the treatment of heart failure and ischemia-reperfusion. We have designed and synthesized a series of N-(2-aminopyridin-4-ylmethyl)nicotinamide derivatives We have discovered a novel NCX inhibitor (I) with an IC50 value of 0.12 μM against reverse NCX. The inhibitory activities of our NCX inhibitors against cytochrome P 450 were also evaluated. The effects on heart failure and the pharmacokinetic profile of I are discussed.

Bioorganic & Medicinal Chemistry published new progress about Heart failure. 639091-75-1 belongs to class esters-buliding-blocks, name is Methyl 2-((tert-butoxycarbonyl)amino)isonicotinate, and the molecular formula is C12H16N2O4, HPLC of Formula: 639091-75-1.

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

Li, Ya-Ning published the artcileHydrogen Bond Effects: A Strategy for Improving Controllability in Organocatalytic Photoinduced Controlled Radical Polymerization Targeting High Molecular Weight, Recommanded Product: Dodecyl 2-methylacrylate, the main research area is hydrogen bond organocatalysis photoinduced controlled radical polymerization.

A highly efficacious photoinduced reversible complexation-mediated polymerization (photo-RCMP) system using amino alc. N-oxide as the catalyst was developed, allowing access to controlled high-mol.-weight polymers of different methacrylates (Mn = 497-815 kg/mol, D < 1.5), which is challenging for those known catalytic systems of photo-RCMPs and most organocatalytic photoinduced controlled radical polymerization as it demands higher controllability of catalysts. The monomers can be converted into the polymers nearly quant. under simulated or natural sunlight irradiation Strong hydrogen bond effects are observed in this high-mol.-weight photo-RCMP, in terms of both monomer conversion and mol. weight controllability. The insights of the effects are revealed as the intramol. hydrogen bond of the N-oxide catalyst modifies the electron d. of N-oxide, and thereby facilitates the regeneration of the catalyst (activator) and release of I2 as a predominant effective regulator of radical concentration, by the studies of x-ray anal., control experiments, d. functional theory calculation, UV-vis absorption spectroscopy, etc. ACS Catalysis published new progress about Hydrogen bond. 142-90-5 belongs to class esters-buliding-blocks, name is Dodecyl 2-methylacrylate, and the molecular formula is C16H30O2, Recommanded Product: Dodecyl 2-methylacrylate.

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

Li, Pengcheng published the artcileSynthesis and properties of the active polymer for enhanced heavy oil recovery, Related Products of esters-buliding-blocks, the main research area is alkylphenol ethoxylate active polymer enhanced heavy oil recovery.

With the continued recovery of heavy oil, conventional polymer flooding cannot be applied to heavy oil reservoirs gradually due to the characteristics of heavy oil reservoirs. To study oil displacement agent suitable for enhanced heavy oil recovery and investigate the effect of EO chain length on the performances, acrylamide, acrylic acid, lauryl methacrylate and C10-C16 alkylphenol ethoxylates were selected to co-polymerize into the active polymer PAAP-x with different EO chain length (14, 16, 18, 20 and 22). Proton NMR anal. indicated PAAP-x as the target product. The optimal EO chain length of PAAP-x was determined to be 18 by the anal. of thickening, salt-tolerance, interfacial activity, wettability, viscosity reduction and recovery. Compared with conventional polymer P1, 1500 mg/L PAAP-18 exhibited superior performances with salinity of 6882.2 mg/L: (1) PAAP-18 could maintain the viscosity of 113.1 mPa.s, while P1was 44.8 mPa.s. (2) PAAP-18 could reduce the water-oil IFT from 44.4 mN/m to 13.0 mN/m, while P1 was to 30.6 mN/m, and the water-oil contact angle was 58.2°and 108.5°, resp. (3) The heavy oil viscosity reduction rate of PAAP-18 was 81.7% at 50 °C, while P1 was only 33.8%. (4) PAAP-18 enhanced heavy oil recovery by 19.85% on the basis of water flooding while conventional polymer was only 8.69%. This study has theor. guidance and practical significance for the study on new oil displacement agent to enhance heavy oil recovery.

Colloids and Surfaces, A: Physicochemical and Engineering Aspects published new progress about Contact angle. 142-90-5 belongs to class esters-buliding-blocks, name is Dodecyl 2-methylacrylate, and the molecular formula is C16H30O2, Related Products of esters-buliding-blocks.

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

Hoeppener, Christiane published the artcileMultimodal Characterization of Resin Embedded and Sliced Polymer Nanoparticles by Means of Tip-Enhanced Raman Spectroscopy and Force-Distance Curve Based Atomic Force Microscopy, Safety of Dodecyl 2-methylacrylate, the main research area is sliced polymer nanoparticle Raman spectroscopy atomic force microscopy; force-distance curve based atomic force microscopy; microtome slicing; multimodal characterization; polymer nanoparticles; resin embedding; tip-enhanced Raman spectroscopy.

Understanding the property-function relation of nanoparticles in various application fields involves determining their physicochem. properties, which is still a remaining challenge to date. While a multitude of different characterization tools can be applied, these methods by themselves can only provide an incomplete picture. Therefore, novel anal. techniques are required, which can address both chem. functionality and provide structural information at the same time with high spatial resolution This is possible by using tip-enhanced Raman spectroscopy (TERS), but due to its limited depth information, TERS is usually restricted to investigations of the nanoparticle surface. Here, TERS experiments are established on polystyrene nanoparticles (PS NPs) after resin embedding and microtome slicing. With that, unique access to their internal morphol. features is gained, and thus, enables differentiation between information obtained for core- and shell-regions. Complementary information is obtained by means of transmission electron microscopy (TEM) and from force-distance curve based at. force microscopy (FD-AFM). This multimodal approach achieves a high degree of discrimination between the resin and the polymers used for nanoparticle formulation. The high potential of TERS combined with advanced AFM spectroscopy tools to probe the mech. properties is applied for quality control of the resin embedding procedure.

Small published new progress about Crystallinity. 142-90-5 belongs to class esters-buliding-blocks, name is Dodecyl 2-methylacrylate, and the molecular formula is C16H30O2, Safety of Dodecyl 2-methylacrylate.

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

Chen, Senbin published the artcileDesign of Semicrystalline Elastomeric Glassy Triblock Copolymers from Oligoamide-Based RAFT Agents, Recommanded Product: Dodecyl 2-methylacrylate, the main research area is semicrystalline elastomeric glassy triblock copolymer oligoamide RAFT.

Semicrystalline-elastomeric-glassy ABC triblock copolymers, consisting of precisely defined blocks based on oligoamide 11 (OPA11), poly(lauryl methacrylate) (PLMA), and poly(Me methacrylate) (PMMA) have been designed via the combination of melt polycondensation and reversible-addition-fragmentation-transfer (RAFT) polymerization techniques. Semicrystalline OPA11 prepared via melt polycondensation was equipped with a RAFT agent at the ω-position. The resulting functionalized oligomers were further used to mediate the radical polymerization of methacrylate monomers (LMA and MMA) and generate well-defined OPA11-b-PLMA-b-PMMA triblock copolymers. AFM observations of the triblock copolymer in bulk revealed a microphase separation consisting of the formation of PMMA domains surrounded by the PLMA matrix, and the presence of addnl. spherical nanodomains embedded into the PLMA matrix possibly corresponding to OPA11 semicrystalline regions. The triblocks were finally dissolved into a reactive epoxy-based mixture which was subsequently cured to generate a well-defined nanostructured epoxy-amine network by freezing the ABC triblock reaction-induced phase separation Thus, the morphol. appears as a homogeneous dispersion of nanometric spherical micelles (diameter: âˆ?20 nm) constituted of an elastomeric core of PLMA, an outer shell of PMMA and OPA11 in between. The described synthetic strategy and the proposed block copolymer structures may contribute to future efforts aiming at developing new hierarchically organized polymeric materials, which can be implemented in polymer physics and material science.

Macromolecules (Washington, DC, United States) published new progress about Crystallinity. 142-90-5 belongs to class esters-buliding-blocks, name is Dodecyl 2-methylacrylate, and the molecular formula is C16H30O2, Recommanded Product: Dodecyl 2-methylacrylate.

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

Shen, Xin published the artcileBiphasic organohydrogels based on phase change materials with excellent thermostability for thermal management applications, Quality Control of 142-90-5, the main research area is biphasic organohydrogel phase change material thermal management thermostability.

Innovative thermal management materials are in high demand for construction of energy-efficient systems. Evaporative cooling hydrogel has been extensively investigated in passive building cooling owing to its cost-effective and environmental-friendly characteristics. However, poor mech. properties and shape instability severely restrict its scope and lifespan. In this study, we report an ingenious and effective thermal management material, the PCMs organohydrogel, with advanced thermal performance and outstanding shape and thermal stability, which integrates the advantages of evaporative cooling performance of water and latent heat storage capability of eicosane. The biphasic PCMs organohydrogel was synthesized by the CAA-HRP-H2O2 ternary enzyme-mediated polymerization of the eicosane-in-water emulsion stabilized by the cellulose acetoacetate (CAA). CAA played important roles in the system not only as the emulsifier but also as the polymerization mediator. The encapsulation of PCMs by the organohydrogel provides the composites outstanding thermal stability as the decomposition temperature of the eicosane was elevated by 101 °C. Furthermore, the PCMs organohydrogel exhibits excellent thermomech. performance and shape memory effect because of the wrapped phase-transition micro-inclusions and the interfacial tension of heterophases. The application of the PCMs organohydrogel as passive cooling material on the model house roof was demonstrated. The cooling effectiveness of the PCMs organohydrogel was investigated, indicating that the biphasic PCMs organohydrogel is expected to be an efficient and reliable passive thermal management material in building thermoregulations.

Chemical Engineering Journal (Amsterdam, Netherlands) published new progress about Decomposition. 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

Lewin, Anita H. published the artcileCaged Naloxone: Synthesis, Characterization, and Stability of 3-O-(4,5-Dimethoxy-2-nitrophenyl)carboxymethyl Naloxone (CNV-NLX), Recommanded Product: Methyl 2-(4,5-dimethoxy-2-nitrophenyl)acetate, the main research area is caged naloxone dimethoxynitrophenylcarboxymethyl stability photolability diastereomer; 3-O-(α-carboxy-6-nitroveratryl)naloxone; diastereomers; photolabile.

The photolabile analog of the broad-spectrum opioid antagonist naloxone, 3-O-(4,5-dimethoxy-2-nitrophenyl)carboxymethyl naloxone (also referred to as “”caged naloxone””, 3-O-(α-carboxy-6-nitroveratryl)naloxone, CNV-NLX), has been found to be a valuable biochem. probe. While the synthesis of CNV-NLX is simple, its characterization is complicated by the fact that it is produced as a mixture of αR,5R,9R,13S,14S and αS,5R,9R,13S,14S diastereomers. Using long-range and heteronuclear NMR correlations, the 1H NMR and 13C NMR resonances of both diastereomers have been fully assigned, confirming the structures. Monitoring of solutions of CNV-NLX in saline buffer, in methanol, and in DMSO has shown CNV-NLX to be stable for over a week under fluorescent laboratory lights at room temperature Exposure of such solutions to λ 365 nm from a hand-held UV lamp led to the formation of naloxone and CNV-related breakdown products.

ACS Chemical Neuroscience published new progress about Diastereomers. 2982-53-8 belongs to class esters-buliding-blocks, name is Methyl 2-(4,5-dimethoxy-2-nitrophenyl)acetate, and the molecular formula is C11H13NO6, Recommanded Product: Methyl 2-(4,5-dimethoxy-2-nitrophenyl)acetate.

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