Category: alcohols-buliding-blocks

McFetridge, Janet published the artcileInfluence of hydrogenated starch hydrolysates on the glass transition and crystallisation of sugar alcohols, SDS of cas: 64519-82-0, the main research area is isomalt lactitol starch glass transition crystallization.

Low and high mol. weight hydrogenated starch hydrolyzates (HSH) were added to amorphous isomalt and lactitol, and the glass transition temperature (Tg) and crystallization behavior was monitored during storage at 80% relative humidity. Prior to storage, only one Tg was detected in all the binary mixtures when scanned in the differential scanning calorimetry and the Tg was in the temperature range between the Tg of the individual components. When the amorphous samples were stored in humid conditions, more than one Tg were detected. The Tg at the lowest temperature rapidly decreased during storage as the moisture uptake increased but then stabilized at approx. -40°. The maximum moisture uptake of the samples was 40% (weight/weight) and resulted in the formation of a transparent viscous solution Eventually crystallization was observed It was found that both the low and the high mol. weight HSH reduced the crystallization of isomalt, but the low mol. HSH was the most effective.

Food Research International published new progress about Crystallization. 64519-82-0 belongs to class alcohols-buliding-blocks, name is (3R,4R,5R)-6-(((2S,3R,4S,5S,6R)-3,4,5-Trihydroxy-6-(hydroxymethyl)tetrahydro-2H-pyran-2-yl)oxy)hexane-1,2,3,4,5-pentaol, and the molecular formula is C12H24O11, SDS of cas: 64519-82-0.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Rezaei, Farzad published the artcilePolymeric encapsulation of liquids via plasma surface polymerization, Application of Pentaerythritol tetra(3-mercaptopropionate), the main research area is plasma surface polymerization polymer encapsulation.

This study introduces a new approach of liquid encapsulation using an atm. pressure plasma (APP). The technique is similar to interfacial polymerization, though here one phase is liquid (that contains unsaturated C=C bonds) and the other phase is plasma (that contains free radicals). When combined, the atm. plasma can induce surface polymerization of an acrylate-based liquid, resulting in a thin polymeric skin on top of the liquid Measurements with an at. force microscope and a spectroscopic ellipsometer estimate the thickness of the skin formed on top of di(ethylene glycol) diacrylate to be 40-50 nm. To demonstrate an application of this method, we encapsulated hemispherical capsules of reactive adhesives on a glass substrate. These adhesives are based on thiol-acrylate and thiol-acrylate-epoxy systems that react in the presence of a strong base catalyst. Plasma-induced polymerization can encapsulate, immobilize, and isolate sep. droplets of resin and the catalyst in a latent (nonreactive) state. These capsules remain latent until they rupture in response to phys. contact. A tensile testing machine reports an adhesive strength of ∼ 2 MPa for the formulated resins after curing. The capsules reported here may be useful for storing functional liquids for just-in-time release, such as contact-sensitive adhesives, on-demand lubricants, or self-healing agents.

Journal of Applied Polymer Science published new progress about Adhesion, physical. 7575-23-7 belongs to class alcohols-buliding-blocks, name is Pentaerythritol tetra(3-mercaptopropionate), and the molecular formula is C17H28O8S4, Application of Pentaerythritol tetra(3-mercaptopropionate).

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Fujii, Kahori published the artcilePhysical characterization of meso-erythritol as a crystalline bulking agent for freeze-dried formulations, HPLC of Formula: 64519-82-0, the main research area is meso erythritol crystal filler freeze drying cooling crystallization.

The purpose of this study was to identify and characterize new crystalline bulking agents applicable to freeze-dried pharmaceuticals. Thermal anal. of heat-melt sugar and sugar alc. solids as well as their frozen aqueous solutions showed high crystallization propensity of meso-erythritol and d-mannitol. Exptl. freeze-drying of the aqueous meso-erythritol solutions after their cooling by two different methods (shelf-ramp cooling and immersion of vials into liquid nitrogen) resulted in cylindrical crystalline solids that varied in appearance and microscopic structure. Powder X-ray diffraction and thermal anal. indicated different crystallization processes of meso-erythritol depending on the extent of cooling. Cooling of the frozen meso-erythritol solutions at temperatures lower than their Tg’ (glass transition temperature of maximally freeze-concentrated phase, -59.7°C) induced a greater number of nuclei in the highly concentrated solute phase. Growth of multiple meso-erythritol anhydride crystals at around -40°C explains the powder-like fine surface texture of the solids dried after their immersion in liquid nitrogen. Contrarily, shelf-ramp cooling of the frozen solution down to -40°C induced an extensive growth of the solute crystal from a small number of nuclei, leading to scale-like patterns in the dried solids. An early transition of the freezing step into primary drying induced collapse of the non-crystalline region in the cakes. Appropriate process control should enable the use of meso-erythritol as an alternative crystalline bulking agent in freeze-dried formulations.

Chemical & Pharmaceutical Bulletin published new progress about Carbohydrates Role: PEP (Physical, Engineering or Chemical Process), PRP (Properties), THU (Therapeutic Use), PROC (Process), BIOL (Biological Study), USES (Uses). 64519-82-0 belongs to class alcohols-buliding-blocks, name is (3R,4R,5R)-6-(((2S,3R,4S,5S,6R)-3,4,5-Trihydroxy-6-(hydroxymethyl)tetrahydro-2H-pyran-2-yl)oxy)hexane-1,2,3,4,5-pentaol, and the molecular formula is C12H24O11, HPLC of Formula: 64519-82-0.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Matsuda, Takeshi published the artcileRelease behavior of pH sensitive microcapsules containing corrosion inhibitor, Recommanded Product: Pentaerythritol tetra(3-mercaptopropionate), the main research area is core shell pH sensitive microcapsules release behavior corrosion inhibitor.

A pH sensitive microcapsule (pH-MC) which can be decomposed in corrosive environments on metal substrates was synthesized and its release behavior was investigated. Ester chains which can be hydrolyzed under both alk. and acidic conditions were successfully introduced into the shell wall of the pH-MC. In sep. sets of experiments, cerium nitrate was encapsulated as a corrosion inhibitor, whereas aluminum nitrate was used to investigate the release property due its amphoteric nature. Study of the release behavior with the aluminum nitrate-containing pH-MC (Al-MC) demonstrated that the Al-MCs are sensitive to acidic and basic environments and are inactive in neutral environments. It was also found that hydrolysis of the ester chains occurred prior to release of the core materials. When immersed in an electrolyte with the cerium nitrate-containing pH-MC (Ce-MC), the open circuit potential (OCP) of a steel substrate showed a nobler potential than when immersed in an electrolyte without Ce-MC.

Progress in Organic Coatings published new progress about Corrosion inhibitors. 7575-23-7 belongs to class alcohols-buliding-blocks, name is Pentaerythritol tetra(3-mercaptopropionate), and the molecular formula is C17H28O8S4, Recommanded Product: Pentaerythritol tetra(3-mercaptopropionate).

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Kooij, Stefan published the artcileExplosive fragmentation of Prince Rupert’s drops leads to well-defined fragment sizes, Application In Synthesis of 64519-82-0, the main research area is explosive fragmentation glass fragment size.

Abstract: Anyone who has ever broken a dish or a glass knows that the resulting fragments range from roughly the size of the object all the way down to indiscernibly small pieces: typical fragment size distributions of broken brittle materials follow a power law, and therefore lack a characteristic length scale. The origin of this power-law behavior is still unclear, especially why it is such an universal feature. Here we study the explosive fragmentation of glass Prince Rupert’s drops, and uncover a fundamentally different breakup mechanism. The Prince Rupert’s drops explode due to their large internal stresses resulting in an exponential fragment size distribution with a well-defined fragment size. We demonstrate that generically two distinct breakup processes exist, random and hierarchical, that allows us to fully explain why fragment size distributions are power-law in most cases but exponential in others. We show exptl. that one can even break the same material in different ways to obtain either random or hierarchical breakup, giving exponential and power-law distributed fragment sizes resp. That a random breakup process leads to well-defined fragment sizes is surprising and is potentially useful to control fragmentation of brittle solids.

Nature Communications published new progress about Crack (fracture). 64519-82-0 belongs to class alcohols-buliding-blocks, name is (3R,4R,5R)-6-(((2S,3R,4S,5S,6R)-3,4,5-Trihydroxy-6-(hydroxymethyl)tetrahydro-2H-pyran-2-yl)oxy)hexane-1,2,3,4,5-pentaol, and the molecular formula is C12H24O11, Application In Synthesis of 64519-82-0.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Lin, Yu-Ya A. published the artcileOlefin Cross-Metathesis on Proteins: Investigation of Allylic Chalcogen Effects and Guiding Principles in Metathesis Partner Selection, Synthetic Route of 2595-07-5, the main research area is olefin cross metathesis protein allylic chalcogen.

Olefin metathesis has recently emerged as a viable reaction for chem. protein modification. The scope and limitations of olefin metathesis in bioconjugation, however, remain unclear. Herein the authors report an assessment of various factors that contribute to productive cross-metathesis on protein substrates. Sterics, substrate scope, and linker selection are all considered. It was discovered during this investigation that allyl chalcogenides generally enhance the rate of alkene metathesis reactions. Allyl selenides were exceptionally reactive olefin metathesis substrates, enabling a broad range of protein modifications not previously possible. The principles considered in this report are important not only for expanding the repertoire of bioconjugation but also for the application of olefin metathesis in general synthetic endeavors.

Journal of the American Chemical Society published new progress about Bacillus lentus. 2595-07-5 belongs to class alcohols-buliding-blocks, name is (2R,3R,4S,5R,6R)-2-(Allyloxy)-6-(hydroxymethyl)tetrahydro-2H-pyran-3,4,5-triol, and the molecular formula is C9H16O6, Synthetic Route of 2595-07-5.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Li, Jianheng published the artcileDesign, synthesis and biological evaluation of novel 2,4-diaryl pyrimidine derivatives as selective EGFRL858R/T790M inhibitors, Application In Synthesis of 505-10-2, the main research area is cyclopropylindolyl anilinopyrimidine preparation EGFR inhibitor structure activity; pyrimidine antitumor EGFR inhibition SAR docking apoptosis induction pharmacokinetic; Anti-proliferation; Anti-tumor efficacy in vivo; Epidermal growth factor receptor; L858R/T790M double mutants; Non-small cell lung cancer (NSCLC).

A new series of 2,4-diarylpyrimidine derivatives containing a cyclopropyl moiety, I [R = N(Me)(CH2)2OH, thiomorpholino, O(CH2)3SMe, etc., X = H; R = S(CH2)2NMe2, S(O)(CH2)2NMe2, X = Cl], were designed, synthesized and evaluated as novel selective EGFRL858R/T790M inhibitors. The most promising compound, I [R = S(:O)CH2CH2NMe2] (II), demonstrated excellent kinase inhibitory activity against EGFR double mutation with IC50 value of 0.26 nM. Moreover, II provided strong activity against H1975 cells with IC50 value of 0.008μM and exhibited little toxicity toward four non-tumorigenic cell lines. Furthermore, II showed potent antitumor efficacy in a murine EGFRL858R/T790M-driven H1975 xenograft model. These results indicated that II may be a promising drug candidate for further study.

European Journal of Medicinal Chemistry published new progress about Aminopyrimidines Role: ADV (Adverse Effect, Including Toxicity), PAC (Pharmacological Activity), PKT (Pharmacokinetics), PRP (Properties), RCT (Reactant), SPN (Synthetic Preparation), THU (Therapeutic Use), BIOL (Biological Study), RACT (Reactant or Reagent), PREP (Preparation), USES (Uses). 505-10-2 belongs to class alcohols-buliding-blocks, name is 3-(Methylthio)propan-1-ol, and the molecular formula is C4H10OS, Application In Synthesis of 505-10-2.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Jiang, Yaoyao published the artcileA High-Fidelity Preparation Method for Liquid Crystal Elastomer Actuators, Name: Pentaerythritol tetra(3-mercaptopropionate), the main research area is fidelity liquid crystal elastomer actuator.

Three-dimensional (3D) structural actuators based on monodomain liquid crystal elastomers (mLCEs) show a wide range of potential applications. A direct ink writing technique has been developed to print LCE structures. It is still a challenge to print high-precision 3D-mLCE actuators. Here, a method of wet 3D printing combined with freeze-drying is proposed. The coagulation bath is designed to restrain the nascent fiber disturbance of the capillary wave and weight by adjusting the ink viscosity and printing speed to control the LC mol. order, enabling uniform (B = 1.02) fibers with a high degree of orientational alignment (S = 0.45) of the mesogens. Furthermore, dynamic disulfide bond formation was used as the crosslinking point, which can allow the LCE network structure to be continuously cured to ensure adjacent layers are effectively bonded and, in combination with freeze-drying, produce the 3D-mLCE actuators of fidelity architecture (98.37 volume %) by printing. The actuators have excellent actuating strain (45.12%), and the dynamic disulfide bond makes them programmable. Finally, a printed bionic starfish and a printed bionic hand can easily grab regular and irregular objects. This work provides a feasible scheme for fabricating complex 3D-mLCEs with reversible changes in shape.

Langmuir published new progress about Actuators. 7575-23-7 belongs to class alcohols-buliding-blocks, name is Pentaerythritol tetra(3-mercaptopropionate), and the molecular formula is C17H28O8S4, Name: Pentaerythritol tetra(3-mercaptopropionate).

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Tian, Guangming published the artcileA polycaprolactone/polydopamine nanocomposite with sunlight-induced shape memory effect and solid state plasticity, Recommanded Product: Pentaerythritol tetra(3-mercaptopropionate), the main research area is polydopamine doped polycaprolactone diol acrylate thiol shape memory elasticity.

A facile photo-cured polycaprolactone (PCL)/polydopamine (PDA) nanocomposite is prepared via thiol-ene reaction. Owing to favorable light-to-thermal transfer of doped polydopamine nanoparticles (PDAPs) in composites, active photo-thermal actuation of the composite is achieved when subjected to simulated sunlight irradiation, the effects of sunlight intensity and PDAPs concentration on the composite’s surface temperature are studied systematically. Solid state plasticity is also achieved by activating the dynamic transesterification reaction within the same polymer network. More importantly, the composite also features sunlight-induced plasticity under a light intensity of 960 mW cm-2. Macroscopically, the flat permanent shape can be reconfigured to a new 3D permanent shape via simulated sunlight, and the reconfigured shape still exhibits excellent elasticity-based shape memory behaviors even after seven cycles of testing. Based on these special properties, the PCL/PDAPs composite is further used in the field of electronic devices. It is expected that the design of PCL-PDAPs composite can pave a simple pathway for the simplification of complex shapes and can be extended to fabricate light-operated actuators.

Smart Materials and Structures published new progress about Actuators. 7575-23-7 belongs to class alcohols-buliding-blocks, name is Pentaerythritol tetra(3-mercaptopropionate), and the molecular formula is C17H28O8S4, Recommanded Product: Pentaerythritol tetra(3-mercaptopropionate).

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Fabregat-Sanjuan, Albert published the artcileControlled composite processing based on off-stoichiometric thiol-epoxy dual-curing systems with sequential heat release (SHR), Safety of Pentaerythritol tetra(3-mercaptopropionate), the main research area is composite stoichiometric thiol epoxy curing system heat SHR.

Control of curing rate and exothermicity during processing of thermosetting composite materials is essential in order to minimize the formation of internal stresses leading to mech. and dimensional defects in the samples, especially in thick composite samples. It was recently proposed that sequential heat release, an approach based on the kinetic control of the curing sequence of dual-curing thermosets, would enable a step-wise release of the reaction heat and therefore a better control of conversion and temperature profiles during the crosslinking stage. In this article, it is shown exptl. proof of this concept obtained by means of an instrumented mold that can be used for the processing of small samples with and without carbon fiber reinforcement. Safe processing scenarios have been defined by numerical simulation using a simplified two-dimensional heat transfer model and validated exptl.

Journal of Applied Polymer Science published new progress about Carbon fibers Role: MOA (Modifier or Additive Use), USES (Uses) (Grafil 34-70012). 7575-23-7 belongs to class alcohols-buliding-blocks, name is Pentaerythritol tetra(3-mercaptopropionate), and the molecular formula is C17H28O8S4, Safety of Pentaerythritol tetra(3-mercaptopropionate).

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts