Tag: 200-300

On May 31, 1984, Hirabayashi, Shigeru; Nasu, Ikuyo; Harashima, Ikuro; Hirasawa, Tadashi published an article.Name: 2,2-Dimethylpropane-1,3-diyl bis(2-methylacrylate) The title of the article was Studies on dental methacrylic resins. Part 9. On composition of heat-shock, pour-type and self-curing denture base resins. And the article contained the following:

The compositions of the powders and the liquids of 9 heat-curing, 3 heat-shock, 6 pour-type and 1 self-curing denture base resins were analyzed by pyrolysis gas chromatog., HPLC and IR spectroscopy. The polymer powders of 14 resins investigated were granular poly(Me methacrylate) (PMMA) [9011-14-7]. However, 2 pour-type and 1 self-curing resin used Et methacrylate-Me methacrylate polymer  [25685-29-4] as the polymer powder. In 1 heat curing resin, the powder mixture of which showed a long dough-stage, the polymer blend consisted of PMMA and Bu methacrylate-Me methacrylate polymer  [25608-33-7] and another heat-curing resin, called impact-resistant resin used PMMA containing a small amount of styrene-butadiene rubber, as the polymer powder. The average mol. weights and the average grain sizes of these polymers were 6∼110×104 and 15∼80 μm, resp. The average mol. weights and the grain sizes of the polymers of the pour-type and self-curing resins were smaller than those of the heat-curing and heat shock ones. The liquids of resins investigated all contained Me methacrylate  [80-62-6] as main component, and crosslinking agent except for one material. Ethylene glycol dimethacrylate  [97-90-5], 1,3-butanediol dimethacrylate (1,3-BuDMA) [1189-08-8], 1,4-butanediol dimethacrylate  [2082-81-7], and (or) trimethylolpropane trimethacrylate (TMPT) [3290-92-4] were used as crosslinking agents, and these contents were almost 3∼5%, but the liquid of one material which had a long dough-stage contained 21% of 1,3-BuDMA. For 1 pour-type and 1 self-curing resin, the unique redox initiator system, namely trimethylbarbituric acid  [7358-61-4]-(Cu2+) (Cl-) might be employed instead of Bz2O2-amine. The experimental process involved the reaction of 2,2-Dimethylpropane-1,3-diyl bis(2-methylacrylate)(cas: 1985-51-9).Name: 2,2-Dimethylpropane-1,3-diyl bis(2-methylacrylate)

The Article related to dental methacrylate resin, denture base methacrylate resin, Pharmaceuticals: Prosthetics and Medical Goods and other aspects.Name: 2,2-Dimethylpropane-1,3-diyl bis(2-methylacrylate)

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

On November 30, 2007, Loyaga-Rendon, Paola G.; Takahashi, Hidekazu; Iwasaki, Naohiko; Reza, Fazal published an article.Safety of 2,2-Dimethylpropane-1,3-diyl bis(2-methylacrylate) The title of the article was Effect of ultraviolet light irradiation on bonding of experimental composite resin artificial teeth. And the article contained the following:

The purpose of the present study was to evaluate how UV light irradiation using an ordinary UV sterilizer would affect the bonding of exptl. composite resins to an autopolymg. acrylic resin. To this end, three composite resins and one unfilled resin, of which the compositions were similar to com. composite resin artificial teeth, were prepared as repair composites. Their shear bond strengths after UV irradiation for one to 60 min were significantly greater than those before UV irradiation regardless of composite resin type. Failure mode after UV irradiation for one to 60 min was mainly cohesive failure of the composite resins, but that before UV irradiation and after 24 h’ irradiation was mainly adhesive failure. These results thus suggested that a short period of UV irradiation on composite resin teeth would improve the bonding efficacy of composite resin artificial teeth to autopolymg. resin. The experimental process involved the reaction of 2,2-Dimethylpropane-1,3-diyl bis(2-methylacrylate)(cas: 1985-51-9).Safety of 2,2-Dimethylpropane-1,3-diyl bis(2-methylacrylate)

The Article related to uv irradiation dental adhesive composite artificial teeth, Pharmaceuticals: Prosthetics and Medical Goods and other aspects.Safety of 2,2-Dimethylpropane-1,3-diyl bis(2-methylacrylate)

Referemce:
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On December 15, 1997, Yoshii, Eiichi published an article.Application In Synthesis of 2,2-Dimethylpropane-1,3-diyl bis(2-methylacrylate) The title of the article was Cytotoxic effects of acrylates and methacrylates: relationships of monomer structures and cytotoxicity. And the article contained the following:

Thirty-nine acrylates and methacrylates that had been used in dental resin materials were evaluated by a cytotoxicity test, and the relationships between their structures and cytotoxicity were studied to predict cytotoxic levels of dental resin materials in order to develop new low-toxic resin materials. All the acrylates evaluated were more toxic than corresponding methacrylates. In both the acrylates and methacrylates, a hydroxyl group seemed to enhance cytotoxicity. Dimethacrylates with 14 or fewer oxyethylene chains showed similar cytotoxicity, while dimethacrylates with 23 oxyethylene chains showed lower cytotoxicity. The cytotoxicity ranking of monomers widely used in dental resin materials was bisGMA > urethane dimethacrylate (UDMA) > triethyleneglycol dimethacrylate (3G) > 2-hydroxyethyl methacrylate (HEMA) > Me methacrylate (MMA). In acrylates, methacrylates, and ethylmethacrylates with ether substituents, the lipophilicity of substituents affected their cytotoxicity, and an inverse correlation between IC50 and logP was observed These results will be useful in developing new resin materials with low toxic monomer compositions The experimental process involved the reaction of 2,2-Dimethylpropane-1,3-diyl bis(2-methylacrylate)(cas: 1985-51-9).Application In Synthesis of 2,2-Dimethylpropane-1,3-diyl bis(2-methylacrylate)

The Article related to dental acrylate methacrylate cytotoxicity structure, Pharmaceuticals: Prosthetics and Medical Goods and other aspects.Application In Synthesis of 2,2-Dimethylpropane-1,3-diyl bis(2-methylacrylate)

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

Wen, Yueh Shan published an article in 1991, the title of the article was Fundamental study on microwave cured resin.HPLC of Formula: 1985-51-9 And the article contains the following content:

The composition, polymerization, and mech. properties, and the porosity of com. microwave cured (MC) resin, heat-cured (HA) resin, and the exptl. PMMA-MMA resins were investigated. The starting temperature for the polymerization of MC-resin was lower than that of HA-resin and its exothermic curve was the same as that of the exptl. resin with a redox catalyst. The starting temperature for the polymerization of the exptl. resins decreased with increasing the concentration of benzoyl peroxide (BPO) or by the use of the redox catalyst. The average mol. weights of the exptl. resins with BPO were lower than those of exptl. heat-curing resin, but the mol. weights increased by the use of the redox catalyst. The exptl. resins with BPO showed lower mech. strength than the exptl. heat-curing resin. However, the exptl. resins with the redox catalyst had a mech. strength equal to or higher than that of the exptl. heat-curing resin. The porosity increased with increasing the concentration of BPO, the microwave irradiation time and the thickness of cured product. However, it was suppressed by the use of the redox catalyst. Crosslinking agents of >5 weight% also suppressed the porosity. The experimental process involved the reaction of 2,2-Dimethylpropane-1,3-diyl bis(2-methylacrylate)(cas: 1985-51-9).HPLC of Formula: 1985-51-9

The Article related to methacrylate denture resin microwave crosslinking, Pharmaceuticals: Prosthetics and Medical Goods and other aspects.HPLC of Formula: 1985-51-9

Referemce:
Ester – Wikipedia,
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Zykova, V. A.; Adichtchev, S. V.; Novikov, V. N.; Surovtsev, N. V. published an article in 2020, the title of the article was Second-order-derivative analysis of structural relaxation time in the elastic model of glass-forming liquids.SDS of cas: 118-55-8 And the article contains the following content:

Recently it was shown [V.N.Novikov and A.P.Sokolov, Phys.Rev.E92, 062304 (2015)10.1103/PhysRevE.92.062304] that the second derivative with respect to inverse temperature of the structural relaxation time in some supercooled mol. liquids has a sharp maximum It marks the point at which the apparent activation energy begins to saturate with decreasing temperature The elastic model of glass-forming liquids expresses the temperature dependence of the structural relaxation time through that of the shear modulus. In this paper, we test whether this model is able to predict the maximum of the second derivative We confirm its presence in the elastic model by analyzing the temperature dependence of the Brillouin light scattering in salol. This is a very subtle feature of the temperature dependence, which is greatly enhanced when taking derivatives Its presence in the Brillouin data provides strong support to the elastic model of glass-forming liquids The experimental process involved the reaction of Phenyl Salicylate(cas: 118-55-8).SDS of cas: 118-55-8

The Article related to glass forming liquid second order derivative analysis relaxation time, General Physical Chemistry: Electronic Structure and other aspects.SDS of cas: 118-55-8

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On March 20, 2008, Koppel, Gary A.; Chaney, Michael O. published a patent.Product Details of 53838-27-0 The title of the patent was Preparation of β-lactamylalkanoic acids as cannabinoid receptor modulators. And the patent contained the following:

Substituted 2-(azetidin-2-on-1-yl)alkanoic acids, alkanedioic acids, 2-hydroxyalkyl and 2-acyl alkanoic acids, e.g., I [R4 = substituted phenylethenyl; X = (CH2)n; n = 1-2; A = OH, NH2 and derivatives; or A is taken together with the attached CO group to form an ester; A’ = OH, NH2 and derivatives; or A’ is taken together with the attached CO group to form an ester], were prepared as cannabinoid-1 (CB1) and/or cannabinoid-2 (CB2) receptor modulators for treating disease states associated with and responsive to modulation of the CB1 and/or CB2 receptor activity. modulators. Pharmaceutical compositions containing I are described. Thus, II was prepared, and had IC50 value of < 10 μM and about 1 μM in CB1 and CB2 binding assays on cells. The experimental process involved the reaction of (S)-5-tert-Butyl 1-methyl 2-aminopentanedioate(cas: 53838-27-0).Product Details of 53838-27-0

The Article related to lactamylalkanoic acid preparation cannabinoid receptor modulator, Amino Acids, Peptides, and Proteins: Amino Acids and other aspects.Product Details of 53838-27-0

Referemce:
Ester – Wikipedia,
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On March 26, 2019, Wang, Huijia; Li, Mou; Zhang, Zhongqi; Wang, Hui; Zhao, Jinli; Yang, Xiaolin published a patent.Product Details of 53838-27-0 The title of the patent was Method for preparation of glutamic acid 1-methyl 5-tert-butyl ester. And the patent contained the following:

The title method comprises the steps of: performing a reaction on glutamic acid and methanol under the action of thionyl chloride to generate di-Me glutamate, reacting with tri-Ph chloromethane to protect the amino group of di-Me glutamate with triphenylmethyl, treating with NaOH to remove 5-position Me ester and obtain triphenylmethyl-glutamic acid-1-Me ester, reacting with trichloroacetyl imine t-Bu ester to obtain triphenylmethyl-glutamic acid-1-Me ester-5-t-Bu ester, adding in low-concentration trifluoroacetic acid dichloromethane solution, adding a small amount of triisopropyl silane, and reacting to remove triphenylmethyl and obtain glutamic acid-1-Me ester-5-t-Bu ester. The method has the advantages of easy operation, little byproduct, very easy treatment of product, and high yield. The experimental process involved the reaction of (S)-5-tert-Butyl 1-methyl 2-aminopentanedioate(cas: 53838-27-0).Product Details of 53838-27-0

The Article related to preparation glutamic acid methyl tertbutyl ester, Amino Acids, Peptides, and Proteins: Amino Acids and other aspects.Product Details of 53838-27-0

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

On December 31, 2021, Quijada, Pearl; Trembley, Michael A.; Misra, Adwiteeya; Myers, Jacquelyn A.; Baker, Cameron D.; Perez-Hernandez, Marta; Myers, Jason R.; Dirkx, Ronald A. Jr.; Cohen, Ethan David; Delmar, Mario; Ashton, John M.; Small, Eric M. published an article.Recommanded Product: 2358-84-1 The title of the article was Coordination of endothelial cell positioning and fate specification by the epicardium. And the article contained the following:

The organization of an integrated coronary vasculature requires the specification of immature endothelial cells (ECs) into arterial and venous fates based on their localization within the heart. It remains unclear how spatial information controls EC identity and behavior. Here we use single-cell RNA sequencing at key developmental timepoints to interrogate cellular contributions to coronary vessel patterning and maturation. We perform transcriptional profiling to define a heterogenous population of epicardium-derived cells (EPDCs) that express unique chemokine signatures. We identify a population of Slit2+ EPDCs that emerge following epithelial-to-mesenchymal transition (EMT), which we term vascular guidepost cells. We show that the expression of guidepost-derived chemokines such as Slit2 are induced in epicardial cells undergoing EMT, while mesothelium-derived chemokines are silenced. We demonstrate that epicardium-specific deletion of myocardin-related transcription factors in mouse embryos disrupts the expression of key guidance cues and alters EPDC-EC signaling, leading to the persistence of an immature angiogenic EC identity and inappropriate accumulation of ECs on the epicardial surface. Our study suggests that EC pathfinding and fate specification is controlled by a common mechanism and guided by paracrine signaling from EPDCs linking epicardial EMT to EC localization and fate specification in the developing heart. The experimental process involved the reaction of Oxybis(ethane-2,1-diyl) bis(2-methylacrylate)(cas: 2358-84-1).Recommanded Product: 2358-84-1

The Article related to endothelial cell epicardium emt, Mammalian Biochemistry: Composition and Products and other aspects.Recommanded Product: 2358-84-1

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

Weber, Sandra; Schmidt, Tamina; Schumacher, Paul; Kuballa, Thomas; Mildau, Gerd; Walch, Stephan G.; Hartwig, Andrea; Lachenmeier, Dirk W. published an article in 2019, the title of the article was Quantification of mineral oil aromatic hydrocarbons (MOAH) in anhydrous cosmetics using 1H NMR.Synthetic Route of 118-55-8 And the article contains the following content:

In cosmetic products, hydrocarbons from mineral oil origin are used as ingredients in a wide variety of consistency, from liquid oil to solid wax. Refined mineral oil hydrocarbons consist of MOSH and a low proportion of MOAH (mineral oil aromatic hydrocarbons). In the context of precautionary consumer protection, it is crucial to determine hydrocarbons from mineral oil origin of inferior quality quickly and efficiently. This publication presents a rapid method for quantifying MOAH by proton NMR spectroscopy (1H qNMR) in anhydrous cosmetics such as lipstick, lip gloss, and lip balm. A sample clean-up using solid-phase extraction was developed for the complete removal of interfering aromatic substances to improve the robustness of the method for analyzing compounded cosmetics. In preliminary trials using silica gel thin-layer chromatog., the retention behavior of 21 common aromatic compounds was tested in eluents with different solvent strength including EtOAc, MeOH, cyclohexane, and dichloromethane. Based on these results, the SPE sample cleanup with silica gel and cyclohexane as an eluent was suggested as best suitable for the purpose. The SPE cleanup was successfully achieved for all tested potentially interfering aromatic cosmetic ingredients except for butylated hydroxytoluene. The recovery for lipophilic cosmetics is more than 80% based on naphthalene as calculation equivalent The 1H qNMR method is a good complement to the LC-GC-FID method, which is predominantly used for the determination of MOSH and MOAH. The experimental process involved the reaction of Phenyl Salicylate(cas: 118-55-8).Synthetic Route of 118-55-8

The Article related to anhydrous cosmetics mineral oil aromatic hydrocarbon nmr spectroscopy, Essential Oils and Cosmetics: Skin Preparations and other aspects.Synthetic Route of 118-55-8

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

Vouzara, Triantafyllia; Roussou, Konstantina; Nikolaidis, Alexandros K.; Tolidis, Kosmas; Koulaouzidou, Elisabeth A. published an article in 2020, the title of the article was Organic eluates derived from intermediate restorative dental materials.Name: Oxybis(ethane-2,1-diyl) bis(2-methylacrylate) And the article contains the following content:

A great number of different types of materials have been used in dentistry as intermediate restoratives. Among them, new resin-based bases have been released in the dental market. The present study focuses on the identification of the organic eluates released from such materials and the study of their surface microstructure in combination with their corresponding elemental composition For this purpose, the following materials were used:ACTIVABioACTIVE-BASE/LINER, KetacBond Glass Ionomer, SDR and VitrebondLight Cure Glass Ionomer Liner/Base. Methanolic leachates derived from polymerized materials were analyzed by means of gas chromatog.-mass spectrometry (GC-MS). SEM(SEM) was used for the surface monitoring of suitably prepared specimens. The GC-MS anal. revealed the elution of twenty different substances from the three resin-based materials, while none was eluted from the glass ionomer base. The SEM anal. for Vitrebond presented small pits, the one for KetacBond presented elongated cracks, while no voids were present for ACTIVABioACTIVE-BASE/LINER and SDR. Moreover, the resin matrix of some dental materials may inhibit elements’ accumulation on the surface layers. Particularly, the detected organic eluents may be related to potential toxic effects. The experimental process involved the reaction of Oxybis(ethane-2,1-diyl) bis(2-methylacrylate)(cas: 2358-84-1).Name: Oxybis(ethane-2,1-diyl) bis(2-methylacrylate)

The Article related to resin organic eluate microstructure dental material, gas chromatography, intermediate restorative dental materials, organic eluates, Pharmaceuticals: Prosthetics and Medical Goods and other aspects.Name: Oxybis(ethane-2,1-diyl) bis(2-methylacrylate)

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