Month: November 2022

Fan, Zhiping; Cheng, Ping; Liu, Min; Li, Dacheng; Liu, Guiqin; Zhao, Yanna; Ding, Zhuang; Chen, Fang; Wang, Bingquan; Tan, Xiaoxiao; Wang, Zhengping; Han, Jun published an article in 2017, the title of the article was Poly(glutamic acid) hydrogels crosslinked via native chemical ligation.Related Products of 6038-19-3 And the article contains the following content:

Mild crosslinking methods, which have a strong influence on biomedical hydrogels and scaffolds, have attracted wide attention in recent years. In this project, native chem. ligation (NCL) was utilized to prepare biocompatible and biodegradable hydrogels using naturally derived poly(glutamic acid) (PGA) with no additives or byproducts. Firstly, thiolactone-grafted poly(glutamic acid) (PGA-HC) and cysteine-grafted poly(glutamic acid) (PGA-C) precursors were synthesized. Their structure was confirmed by NMR (NMR). Then, hydrogels crosslinked by NCL were formed by blending buffered solutions of PGA-HC and PGA-C with no additives under physiol. conditions. After that, the equilibrium water content, morphol., degradation rate and mech. properties of the hydrogels were characterized in detail. The data showed that the PGA hydrogels had gelation times, water contents and mech. properties that were tunable by adjusting the precursor composition Furthermore, the biocompatibility of the hydrogels was confirmed by an MTT assay. These characteristics provide a potential opportunity for the NCL hydrogels as wound dressings, skin fillings, drug delivery vehicles and tissue regeneration matrixes. The experimental process involved the reaction of 3-Aminodihydrothiophen-2(3H)-one hydrochloride(cas: 6038-19-3).Related Products of 6038-19-3

The Article related to polyglutamic acid hydrogen crosslinking chem ligation biomaterial, Pharmaceuticals: Prosthetics and Medical Goods and other aspects.Related Products of 6038-19-3

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

On September 30, 1979, Antonucci, J. M.; Grams, C. L.; Termini, D. J. published an article.Application of 1985-51-9 The title of the article was New initiator systems for dental resins based on ascorbic acid. And the article contained the following:

Several promising initiator systems for the ambient polymerization of dental monomers were developed utilizing the oxidation-reduction reactions of certain organic peroxides and certain transition metal compounds with L-(+)-ascorbic acid [50-81-7] and its derivatives The experimental process involved the reaction of 2,2-Dimethylpropane-1,3-diyl bis(2-methylacrylate)(cas: 1985-51-9).Application of 1985-51-9

The Article related to initiator dental resin ascorbate, acceleration ascorbate dental resin, Pharmaceuticals: Prosthetics and Medical Goods and other aspects.Application of 1985-51-9

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

On August 31, 2007, Loyaga-Rendon, Paola G.; Takahashi, Hidekazu; Hayakawa, Iwao; Iwasaki, Naohiko published an article.Category: esters-buliding-blocks The title of the article was Compositional characteristics and hardness of acrylic and composite resin artificial teeth. And the article contained the following:

Statement of problem: New types of artificial teeth are com. available; however, evidence-based information regarding composition and properties is lacking. Purpose: The purpose of this study was to qualify the compositional characteristics and hardness of new com. available types of acrylic resin and composite resin artificial teeth. Material and methods: Twelve brands of 3 types (2 conventional acrylic resins, 3 cross-linked acrylic resins, and 7 composite resins) of artificial teeth were examined The filler geometry and composition were observed using SEM and energy disperse x-ray anal., resp. Vickers hardness was determined for each layer of the polished cross-sectioned teeth. The inorganic content of the enamel layer was determined by thermogravimetric anal. with an ash method. The swelling behavior of the artificial teeth after 12 h of Me methacrylate immersion was observed to determine the crosslinking structure. The data were statistically analyzed using 1-way anal. of variance and Tukey’s multiple comparison (α=.05). Results: Examined teeth were composed of 2, 3, or 4 layers of resin. Different sizes and shapes of filler were found but were composed only of silicon oxide. Vickers hardness ranged from 17.4 to 47.0 kgf/mm2. The inorganic content ranged from 0 to 42.8 mass%. The enamel layer of all teeth, except for 3 products, produced negligible swelling, and the base layer of all the teeth, except for 2 products, produced obvious swelling. A significant linear correlation was observed between hardness and inorganic content. Conclusions: Within the limitations of this study, differences in size, shape, distribution, and content of the silica filler and the crosslinking nature of the resin matrix were found among the com. brands of artificial teeth evaluated. The experimental process involved the reaction of 2,2-Dimethylpropane-1,3-diyl bis(2-methylacrylate)(cas: 1985-51-9).Category: esters-buliding-blocks

The Article related to artificial teeth acrylic composite resin hardness enamel silicon oxide, Pharmaceuticals: Prosthetics and Medical Goods and other aspects.Category: esters-buliding-blocks

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

Capolicchio, Samanta; Thakor, Divyeshsinh T.; Linden, Anthony; Jessen, Henning J. published an article in 2013, the title of the article was Synthesis of Unsymmetric Diphospho-Inositol Polyphosphates.Recommanded Product: (Trimethoxymethyl)benzene And the article contains the following content:

Synthesis of unsym. diphosphoinositol polyphosphates has been developed. The application of one single C2-Sym. phosphoramidite allows inositol to be de-symmetrized, accompanied by the direct introduction of an orthogonally protected phosphate triester, in all four relevant positions. It was shown that this approach is complementary to usually applied de-symmetrization with camphor acetals and is more efficient as a phosphate group is installed directly. Moreover, the auxiliary was cleanly removed upon treatment with base under very mild conditions, as expected from its kinship to the P-CE protecting group, allowing an efficient one-pot synthesis of the vital P-anhydride bond. The experimental process involved the reaction of (Trimethoxymethyl)benzene(cas: 707-07-3).Recommanded Product: (Trimethoxymethyl)benzene

The Article related to cyclitol inositol phosphoinositol phosphate synthesis protective group, Carbohydrates: Alditols, Cyclitols, Glycerides and other aspects.Recommanded Product: (Trimethoxymethyl)benzene

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

Bernard, Lise; Eljezi, Teuta; Clauson, Helene; Lambert, Celine; Bouattour, Yassine; Chennell, Philip; Pereira, Bruno; Sautou, Valerie; ARMED Study Group published an article in 2018, the title of the article was Effects of flow rate on the migration of different plasticizers from PVC infusion medical devices.Computed Properties of 3319-31-1 And the article contains the following content:

Infusion medical devices (MDs) used in hospitals are often made of plasticized polyvinylchloride (PVC). These plasticizers may leach out into infused solutions during clin. practice, especially during risk-situations, e.g multiple infusions in Intensive Care Units and thus may enter into contact with the patients. The migrability of the plasticizers is dependent of several clin. parameters such as temperature, contact time, nature of the simulant, etc. . . However, no data is available about the influence of the flow rate at which drug solutions are administrated. In this study, we evaluated the impact of different flow rates on the release of the different plasticizers during an infusion procedure in order to assess if they could expose the patients to more toxic amounts of plasticizers. Migration assays with different PVC infusion sets and extension lines were performed with different flow rates that are used in clin. practice during 1h, 2h, 4h, 8h and 24h, using a lipophilic drug simulant. From a clin. point of view, the results showed that, regardless of the plasticizer, the faster the flow rate, the higher the infused volume and the higher the quantities of plasticizers released, both from infusion sets and extension lines, leading to higher patient exposure. However, phys., there was no significant difference of the migration kinetics linked to the flow rate for a same medical device, reflecting complex interactions between the PVC matrix and the simulant. The migration was especially dependent on the nature and the composition of the medical device. The experimental process involved the reaction of Tris(2-ethylhexyl) benzene-1,2,4-tricarboxylate(cas: 3319-31-1).Computed Properties of 3319-31-1

The Article related to polyvinylchloride flow rate plasticizer migration infusion medical device, Pharmaceuticals: Prosthetics and Medical Goods and other aspects.Computed Properties of 3319-31-1

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

On March 31, 1990, Yoshida, K.; Matsumura, H.; Atsuta, M. published an article.Synthetic Route of 1985-51-9 The title of the article was Monomer composition and bond strength of light-cured 4-META opaque resin. And the article contained the following:

A light-cured opaque resin was prepared with 4-(2-methacryloxyethoxycarbonyl)phthalic anhydrie (4-META), bifunctional methacrylates, and TiO2. The relation between monomer composition and bond strength was examined with 7 methacrylate monomers. Me methacrylate (MMA) was useful as a solvent of 4-META. However, it was not sufficiently cured by photoinitiator. The bond strength of a triethyleneglycol dimethacrylate (TEGDMA)-based composition was superior to other monomer-based compns after repeated thermocycles. 1,6-Bis(methacryloxy-2-ethoxycarbonylamino)-2,4,4-trimethylhexane (UDMA) effectively provided viscosity to the composition The prepared opaque resin consisted of 4-META/MMA-TEGDMA primer, TEGDMA-UDMA-based monomer, and TiO2. This opaque resin bonded strongly to alumina-blasted Co-Cr alloy. The light-cured 4-META opaque resin may be useful for bonding prosthodontic composite to metal frameworks. The experimental process involved the reaction of 2,2-Dimethylpropane-1,3-diyl bis(2-methylacrylate)(cas: 1985-51-9).Synthetic Route of 1985-51-9

The Article related to dental adhesive bonding monomer composition, methacrylic light resin bonding, Pharmaceuticals: Prosthetics and Medical Goods and other aspects.Synthetic Route of 1985-51-9

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

Cowperthwaite, G. F.; Foy, J. J.; Malloy, M. A. published an article in 1980, the title of the article was The nature of the crosslinking matrix found in dental composite filling materials and sealants.SDS of cas: 1985-51-9 And the article contains the following content:

Monomers based on the long, straight-chain diols, such as tetraethylene glycol dimethacrylate  [109-17-1] and 1,10-decamethylenediol dimethacrylate  [6701-13-9], are more efficient crosslinking agents than the short chain ethylene glycol dimethacrylate  [97-90-5] or highly branched neopentyl glycol dimethacrylate  [1985-51-9] in dental composite filling materials. Observations of H2O uptake and solubility of dental composites indicated that the weight loss on long-term H2O exposure for these composites might be due to leaching of unreacted monomers from the matrix. The experimental process involved the reaction of 2,2-Dimethylpropane-1,3-diyl bis(2-methylacrylate)(cas: 1985-51-9).SDS of cas: 1985-51-9

The Article related to dental composite crosslinking agent, water sorption dental composite crosslinker, Pharmaceuticals: Prosthetics and Medical Goods and other aspects.SDS of cas: 1985-51-9

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

Suzuki, Shiro published an article in 1981, the title of the article was Preparation of hard crown and bridge resins with new composite fillers.Safety of 2,2-Dimethylpropane-1,3-diyl bis(2-methylacrylate) And the article contains the following content:

Composite fillers were prepared with several polyfunctional monomers and 20 mμ hydrophobic colloidal SiO2 to improve the properties of the dental resins. Thus, 100 parts 6:4 mixture of triethylene glycol dimethacrylate and bisphenol A dimethacrylate, neopentyl glycol dimethacrylate, trimethylolpropane trimethacrylate (I) ethylene glycol dimethacrylate, or a 1:1 mixture of 2,2-bis[4-methacryloxypoly(oxyethylene)phenyl]propane(II) and dimethacryloxyethyl trimethylhexamethylene diurethane(III) was mixed with 50 parts SiO2 and 0.5 parts Bz2O2, followed by polymerization 20 min at 100-120°, and ball milled to give a filler. The filler(120 parts) was mixed with 100 parts of matrix monomers, 0.6 part Bz2O2, and 16.7 parts SiO2, followed by polymerization 20 min at 100-120° in a Teflon mold under pressure. Mech. properties of the test specimens were best with the filler prepared with I. Combination of the filler prepared from I and the matrix monomers, the 1:1 mixture of II and III, gave a product with the highest compressive strength, transverse strength, and the Brinnell hardness and the lowest thermal expansion coefficient 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 dental composite filler, crown bridge dental composite, methacrylate dental composite, Pharmaceuticals: Prosthetics and Medical Goods and other aspects.Safety of 2,2-Dimethylpropane-1,3-diyl bis(2-methylacrylate)

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

On June 30, 1981, Dulik, Dianne; Bernier, Renee; Brauer, G. M. published an article.SDS of cas: 1985-51-9 The title of the article was Effect of diluent monomer on the physical properties of bis-GMA-based composites. And the article contained the following:

The effect of diluents, e.g. RO(CH2)nOR (R = CH2:CMeCO and n = 2,4,6,10) and RO(CH2CH2O)nR [R = CH2:CMeCO and n = 2,3,4] on phys. properties of bis-GMA (I) [1565-94-2] solution and the cured resin in the I-based powder-liquid system was determined Viscosity and surface tension of the liquid increased with decreasing concentration and increasing mol. weight of the diluent. Setting times of the composites decreased with increasing number of methacrylate groups in the diluent. Composites with polymethylene glycol dimethacrylates, 2-hydroxyethyl methacrylate [868-77-9] or Me methacrylate [80-62-6] in the liquid had optimum tensile strength. The coefficient of thermal expansion increased with chain length of the polymethylene glycol dimethacrylate. Composites containing diluents with ≥1 methacrylate group in the mol. had low H2O sorption. Addition of dimethacrylate diluents containing (CH2)n units yielded generally more desirable composites than those containing (CH2CH2O)n groups. The experimental process involved the reaction of 2,2-Dimethylpropane-1,3-diyl bis(2-methylacrylate)(cas: 1985-51-9).SDS of cas: 1985-51-9

The Article related to bisgma glycol methacrylate composite property, dental composite bisgma monomer diluent, Pharmaceuticals: Prosthetics and Medical Goods and other aspects.SDS of cas: 1985-51-9

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

On September 30, 2000, Hashimoto, Yoshiya; Nakamura, Masaaki published an article.Recommanded Product: 1985-51-9 The title of the article was Estrogenic activity of dental materials and bisphenol-A related chemicals in vitro. And the article contained the following:

Twenty-eight chems. used as dental materials and bisphenol-A related chems. were diluted with DMSO to concentrations ranging from 10-7 to 10-3M and tested for estrogenicity. Bisphenol-A (BPA), bisphenol-F (BPF) and bisphenol-A-bischloroformate (BPACF) showed estrogenic activity by using the yeast 2-hybrid system, and BPA, BPF, BPACF and bisphenol-S (BPS) showed estrogenic activity by using the fluorescence polarization system. However, none of the remaining chems. and none of the dental materials showed any activity at concentrations between 10-7 and 10-3M. Although BPA, BPF, BPACF, bisphenol-A-dimethacrylate and BPS showed estrogenic activity in the E-screen test, the remaining chems. did not. Thus, most of the chems. showed consistent results, either pos. or neg., by the three testing methods, while 2 compounds showed conflicting results. Further studies, together with in vivo and epidemiol. examinations, are required. Elucidation of the structure-activity relationships of these chems. is also needed to estimate the estrogenicity of a chem. from its structure. The experimental process involved the reaction of 2,2-Dimethylpropane-1,3-diyl bis(2-methylacrylate)(cas: 1985-51-9).Recommanded Product: 1985-51-9

The Article related to bisphenol a dental composite estrogen, endocrine disrupter bisphenol a dental composite, Pharmaceuticals: Prosthetics and Medical Goods and other aspects.Recommanded Product: 1985-51-9

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