Month: November 2022

On February 12, 2016, Liao, Guochao; Zhou, Zhifang; Liao, Jun; Zu, Luning; Wu, Qiuye; Guo, Zhongwu published an article.Recommanded Product: Bis(2,5-dioxopyrrolidin-1-yl) glutarate The title of the article was 6-O-branched oligo-β-glucan-based antifungal glycoconjugate vaccines. And the article contained the following:

With the rapid growth in fungal infections and drug-resistant fungal strains, antifungal vaccines have become an especially attractive strategy to tackle this important health problem. β-Glucans, a class of extracellular carbohydrate antigens abundantly and consistently expressed on fungal cell surfaces, are intriguing epitopes for antifungal vaccine development. β-Glucans have a conserved β-1,3-glucan backbone with sporadic β-1,3- or β-1,6-linked short glucans as branches at the 6-O-positions, and the branches may play a critical role in their immunol. functions. To study the immunol. properties of branched β-glucans and develop β-glucan-based antifungal vaccines, three branched β-glucan oligosaccharides with 6-O-linked β-1,6-tetraglucose, β-1,3-diglucose, and β-1,3-tetraglucose branches on a β-1,3-nonaglucan backbone, which mimic the structural epitopes of natural β-glucans, were synthesized and coupled with keyhole limpet hemocyanin (KLH) to form novel synthetic conjugate vaccines. These glycoconjugates were proved to elicit strong IgG antibody responses in mice. It was also discovered that the number, size, and structure of branches linked to the β-glucan backbone had a significant impact on the immunol. property. Moreover, antibodies induced by the synthetic oligosaccharide-KLH conjugates were able to recognize and bind to natural β-glucans and fungal cells. Most importantly, these conjugates elicited effective protection against systemic Candida albicans infection in mice. Thus, branched oligo-β-glucans were identified as functional epitopes for antifungal vaccine design and the corresponding protein conjugates as promising antifungal vaccine candidates. The experimental process involved the reaction of Bis(2,5-dioxopyrrolidin-1-yl) glutarate(cas: 79642-50-5).Recommanded Product: Bis(2,5-dioxopyrrolidin-1-yl) glutarate

The Article related to branched beta glucan antifungal glycoconjugate vaccine, carbohydrate, fungus, glycoconjugate, vaccine, β-glucan, Immunochemistry: Adjuvants, Antigens, Haptens, and Vaccines and other aspects.Recommanded Product: Bis(2,5-dioxopyrrolidin-1-yl) glutarate

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

On March 22, 2017, Mandal, Satadru Sekhar; Duncombe, Lucy; Ganesh, N. Vijaya; Sarkar, Susmita; Howells, Laurence; Hogarth, Philip J.; Bundle, David R.; McGiven, John published an article.SDS of cas: 79642-50-5 The title of the article was Novel solutions for vaccines and diagnostics to combat brucellosis. And the article contained the following:

Brucellosis is diagnosed by detection of antibodies in the blood of animals and humans that are specific for two carbohydrate antigens, termed A and M, which are present concurrently in a single cell wall O-polysaccharide. Animal brucellosis vaccines contain these antigenic determinants, and consequently infected and vaccinated animals cannot be differentiated as both groups produce A and M specific antibodies. We hypothesized that chem. synthesis of a pure A vaccine would offer unique identification of infected animals by a synthetic M diagnostic antigen that would not react with antibodies generated by this vaccine. Two forms of the A antigen, a hexasaccharide and a heptasaccharide conjugated to tetanus toxoid via reducing and nonreducing terminal sugars, were synthesized and used as lead vaccine candidates. Mouse antibody profiles to these immunogens showed that to avoid reaction with diagnostic M antigen it was essential to maximize the induction of anti-A antibodies that bind internal oligosaccharide sequences and minimize production of antibodies directed toward the terminal nonreducing monosaccharide. This objective was achieved by conjugation of Brucella O-polysaccharide to tetanus toxoid via its periodate oxidized terminal nonreducing monosaccharide, thereby destroying terminal epitopes and focusing the antibody response on internal A epitopes. This establishes the method to resolve the decades-long challenge of how to create effective brucellosis vaccines without compromising diagnosis of infected animals. The experimental process involved the reaction of Bis(2,5-dioxopyrrolidin-1-yl) glutarate(cas: 79642-50-5).SDS of cas: 79642-50-5

The Article related to vaccine brucella a antigen polysaccharide tetanus toxoid brucellosis, diagnosis brucellosis brucella synthetic m antigen polysaccharide, Immunochemistry: Adjuvants, Antigens, Haptens, and Vaccines and other aspects.SDS of cas: 79642-50-5

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

Zhou, Zhifang; Liao, Guochao; Mandal, Satadru S.; Suryawanshi, Sharad; Guo, Zhongwu published an article in 2015, the title of the article was A fully synthetic self-adjuvanting globo H-Based vaccine elicited strong T cell-mediated antitumor immunity.Product Details of 79642-50-5 And the article contains the following content:

Therapeutic cancer vaccines based on the abnormal glycans expressed on cancer cells, such as the globo H antigen, have witnessed great progress in recent years. For example, the keyhole limpet hemocyanin (KLH) conjugate of globo H has been on clin. trials as a cancer vaccine. However, such vaccines have intrinsic problems, such as inconsistence in eliciting T cell-mediated immunity in cancer patients and difficult quality control. To address the issue, a structurally defined fully synthetic glycoconjugate vaccine composed of globo H and monophosphoryl lipid A (MPLA) was developed. The new vaccine was shown to elicit robust IgG1 antibody responses and T cell-dependent immunity, which is desired for anticancer vaccines, and induce significantly faster and stronger immune responses than the globo H-KLH conjugate. Moreover, it was self-adjuvanting, namely, inducing immune responses without the use of an external adjuvant, thus MPLA was not only a vaccine carrier but also a build-in adjuvant. It was also found that antibodies induced by the new vaccine could selectively bind to and mediate strong complement-dependent cytotoxicity to globo H-expressing MCF-7 cancer cell. All of the results have demonstrated that the globo H-MPLA conjugate is a better cancer vaccine than the globo H-KLH conjugate under exptl. conditions and is worth further investigation and development. The experimental process involved the reaction of Bis(2,5-dioxopyrrolidin-1-yl) glutarate(cas: 79642-50-5).Product Details of 79642-50-5

The Article related to t cell antitumor immunity self adjuvanting globo h vaccine, mcf-7 cancer cell, cancer vaccine, globo h, glycoconjugate, monophosphoryl lipid a, Immunochemistry: Adjuvants, Antigens, Haptens, and Vaccines and other aspects.Product Details of 79642-50-5

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

On January 18, 2013, Ren, Hong; Wulff, William D. published an article.Application In Synthesis of (R)-Methyl 3-hydroxybutanoate The title of the article was Total Synthesis of Sedum Alkaloids via Catalyst Controlled aza-Cope Rearrangement and Hydroformylation with Formaldehyde. And the article contained the following:

The catalytic asym. aminoallylation of chiral aldehydes is developed as a new method for the catalyst controlled synthesis of syn- and anti-1,3-aminoalcs. This methodol. is highlighted in the synthesis of the sedum alkaloids (+)-sedridine (I) and (+)-allosedridine (II) both of which have their final carbon incorporated during closure of the piperidine ring via a hydroformylation with formaldehyde. The experimental process involved the reaction of (R)-Methyl 3-hydroxybutanoate(cas: 3976-69-0).Application In Synthesis of (R)-Methyl 3-hydroxybutanoate

The Article related to enantioselective synthesis sedum alkaloid azo cope rearrangement hydroformation, sedridine allosedridine enantioselective synthesis aminoallylation, Alkaloids: Alkaloids Containing One Nitrogen Atom In A Ring and other aspects.Application In Synthesis of (R)-Methyl 3-hydroxybutanoate

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

On July 1, 2019, Liao, Jun; Pan, Bo; Liao, Guochao; Zhao, Qingjie; Gao, Yun; Chai, Xiaoyun; Zhuo, Xiaobin; Wu, Qiuye; Jiao, Binghua; Pan, Weihua; Guo, Zhongwu published an article.SDS of cas: 79642-50-5 The title of the article was Synthesis and immunological studies of β-1,2-mannan-peptide conjugates as antifungal vaccines. And the article contained the following:

Fungal cell surface carbohydrates and proteins are useful antigens for the development of antifungal vaccines. In this study, glycopeptides consisting of the β-1,2-mannan and N-terminal peptide epitopes of Candida albicans (C. albicans) cell wall phosphomannan complex and Als1p (rAls1p-N) protein, resp., were synthesized and covalently conjugated with keyhole limpet hemocyanin (KLH) and human serum albumin (HSA) through homobifunctional disuccinimidyl glutarate. The resultant KLH-conjugates were immunol. evaluated using Balb/c mice to reveal that they induced high levels of IgG antibodies. Furthermore, these conjugates showed self-adjuvanting property, as they could promote robust antibody responses without the presence of an external adjuvant. More significantly, the obtained antisera could effectively recognize both the carbohydrate and the Als1 peptide epitopes and immunofluorescence and flow cytometry assays also demonstrated that the elicited antibodies could react with the cell surface of a number of fungi, including C. albicans, C. tropicalis, C. lusitaniae and C. glabrata. These results suggested the great potential of these conjugates as antifungal vaccines. The experimental process involved the reaction of Bis(2,5-dioxopyrrolidin-1-yl) glutarate(cas: 79642-50-5).SDS of cas: 79642-50-5

The Article related to fungus candida oligosaccharide als1 peptide glycopeptide glycoconjugate antifungal vaccine, candida albicans, fungus, glycoconjugate, glycopeptide, vaccine, β-1,2-mannan, Immunochemistry: Adjuvants, Antigens, Haptens, and Vaccines and other aspects.SDS of cas: 79642-50-5

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

On January 9, 2020, Wu, Bo; Liu, Zhimeng; Lei, Yuan; Wang, Yi; Liu, Qinfeng; Yuan, Anqian; Zhao, Yuanyang; Zhang, Xi; Lei, Jingxin published an article.Electric Literature of 517-23-7 The title of the article was Mutually-complementary structure design towards highly stretchable elastomers with robust strength and autonomous self-healing property. And the article contained the following:

Achieving good transparency, high strength and superior extensibility simultaneously in autonomic self-healing elastomers remains challenging and fascinating. Herein, a complementary design strategy of combining densely distributed multiple hydrogen bonds and loosely packed spacer units in supramol. elastomer was reported to address the inherent contradiction of robust strength and room temperature self-healing. The chem. structure can be tuned to achieve a good compromise between the mech. properties and self-healing efficiency. The representative elastomers can achieve robust strength (6.81 MPa), high extensibility (2520%) and superior toughness with the dissipated energy up to 63.7 MJ/m3. Moreover, this elastomer is capable of recovering mech. fractures and routine scratches with the self-healing efficiency up to 90%, which are comparable to that of room-temperature self-healable counterparts. Spacer units with steric hindrance effect can facilitate segmental motions and dynamic changes of H-bonds. Meanwhile, the randomly distributed multiple H bonds crosslinking such spacers contribute to the good mech. performance and intriguing self-healing. In contrast to previous reports, this strategy provides an uncomplicated and cost-effective route to prepare robust elastomers that can self-heal at room temperature without any need of external assistance. The experimental process involved the reaction of 3-Acetyldihydrofuran-2(3H)-one(cas: 517-23-7).Electric Literature of 517-23-7

The Article related to stretchable self healable supramol elastomer hydrogen bonding, Synthetic Elastomers and Natural Rubber: Elastomer Synthesis and other aspects.Electric Literature of 517-23-7

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

On July 9, 2021, Li, Jian; Niu, Hongyao; Yu, Yingfeng; Gao, Yulei; Wu, Qiang; Wang, Fenfen; Sun, Pingchuan published an article.Application In Synthesis of 3-Acetyldihydrofuran-2(3H)-one The title of the article was Supramolecular Polydimethylsiloxane Elastomer with Enhanced Mechanical Properties and Self-Healing Ability Engineered by Synergetic Dynamic Bonds. And the article contained the following:

Hydrophobic elastomers are required for use in industry and daily life because of their versatile properties. Developing a hydrophobic elastomer with self-healing abilities and excellent mech. performance has been very challenging because of the mutually exclusive nature of these properties. Herein, supramol. polydimethylsiloxane (PDMS) elastomers with excellent self-healing and mech. properties were designed through the synergetic combination of multistrength H-bonds and disulfide bonds. The hierarchical H-bonds formed with urethane, urea, and 2-ureido-4[1H]-pyrimidinone (UPy) moieties in the backbone of the supramol. polymer endow the resultant polymers with effective reversible crosslinking, whereas during stretching, the dynamic dissociation and reassociation of H-bonds enable polymers with high extensibility and enhanced toughness and recoverability. In addition, disulfide bond exchange under heat enables polymer network rearrangement, thus imbuing the supramol. elastomer with excellent self-healing ability. Based on the extraordinary properties of hydrophobic supramol. PDMS elastomers, some smart materials can be prepared, such as oil/water separation foams and hydrophobic hot-melt adhesives. Therefore, this concept of synergetic dynamic bonds will point out a direction for the development of sustainable, green, and functional materials of the next generation. The experimental process involved the reaction of 3-Acetyldihydrofuran-2(3H)-one(cas: 517-23-7).Application In Synthesis of 3-Acetyldihydrofuran-2(3H)-one

The Article related to supramol polydimethylsiloxane elastomer synergetic dynamic bond, Synthetic Elastomers and Natural Rubber: Elastomer Synthesis and other aspects.Application In Synthesis of 3-Acetyldihydrofuran-2(3H)-one

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

On June 30, 2022, Ye, Juan; Lin, Guanghong; Lin, Ziqian; Deng, Haoyu; Huang, Junjie; Xiang, Hongping; Rong, Min Zhi; Zhang, Ming Qiu published an article.SDS of cas: 517-23-7 The title of the article was UV-Curable Polyurethane Elastomer with UV-Irradiation/Thermo Dual-Activated Self-Healability. And the article contained the following:

Self-healable polyurethane elastomers have potential applications in many fields, however, their use is limited by single self-healing mechanism, intricate preparation process, and long curing time. Herein, a UV-irradiation/thermo dual-induced self-healing polyurethane elastomer is prepared by UV-curing two kinds of acrylates, where one includes a quadruple hydrogen bond (PU-UPy-HEA) and the other contains a disulfide bond (SS-MA). UV-curing kinetics indicate that the conversion of acrylates is significantly improved by tuning the irradiation intensity, photoinitiator dosage, and SS-MA content. A maximum conversion of 80% is achieved within 10 s under 200 mW cm-2 in the case of the 1.5 weight% photoinitiator. The tensile strength of UV-cured polyurethane elastomer is notably improved by SS-MA, whereas its elongation at break decreases. Tensile shear tests demonstrates that the bisected samples can be re-bonded when they are repaired at 100°C for 15 min, or under 200 mW cm-2 irradiation for 1 h. After that, ∼90% of shear strength is recovered and the strength is only slightly reduced after two healing cycles. Self-healing mainly relies on thermally reversible hydrogen bonding interactions and UV-induced disulfide metathesis. This UV-cured self-healable polyurethane elastomer can be used in smart coatings as well as in other fields. The experimental process involved the reaction of 3-Acetyldihydrofuran-2(3H)-one(cas: 517-23-7).SDS of cas: 517-23-7

The Article related to polyurethane elastomer thermo activated self heal ability material, Synthetic Elastomers and Natural Rubber: Elastomer Synthesis and other aspects.SDS of cas: 517-23-7

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

On December 31, 2019, Li, Ting; Zheng, Tian-Ze; Guo, Zhao-Xia; Xu, Jun; Guo, Bao-Hua published an article.Product Details of 517-23-7 The title of the article was A Well-defined Hierarchical Hydrogen Bonding Strategy to Polyureas with Simultaneously Improved Strength and Toughness. And the article contained the following:

A well-defined quadruple hydrogen bonding strategy involving dimerization of 2-ureido-4[1H]-pyrimidone (UPy) units is innovatively designed to prepare polyureas with high overall mech. properties. Three polyureas containing different amounts of UPy units were synthesized by replacing a portion of isophorone diisocyanate (IPDI) with a UPy-derived diisocyanate. The formation of quadruple hydrogen bonds in hard segments via UPy dimers was confirmed by NMR and fourier transform IR spectroscopy. The mech. properties of the polyureas were evaluated by uniaxial tensile testing. Compared to the polyurea without UPy units, remarkable improvements in Young’s modulus, tensile strength, and toughness were simultaneously achieved when UPy units were incorporated. The mechanism behind the strong strengthening effect rooted in the stronger intermol. forces among hard segments brought by the quadruple hydrogen bonds, which were stronger than the inherent bidentate and monodentate hydrogen bonds among urea groups, and the slower soft segmental dynamics revealed by both increased Tg and relaxation time of the soft segments. The mechanism behind the strong toughening effect was ascribed to more effective energy dissipation brought by the quadruple hydrogen bonds that served as stronger sacrificial bonds upon deformation. This work may offer new insight into the design of polyurea elastomers with comprehensively improved mech. properties. The experimental process involved the reaction of 3-Acetyldihydrofuran-2(3H)-one(cas: 517-23-7).Product Details of 517-23-7

The Article related to polyurea elastomer preparation hierarchical hydrogen bonding mech property, Synthetic Elastomers and Natural Rubber: Elastomer Synthesis and other aspects.Product Details of 517-23-7

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

Xu, Kangming; Chen, Guoqing; Zhao, Mingjie; He, Weiyi; Hu, Qiaoman; Pu, Yong published an article in 2022, the title of the article was Transparent, self-recoverable, highly tough, puncture and tear resistant polyurethane supramolecular elastomer with fast self-healing capacity via “hard-soft” hard domain design.Application of 517-23-7 And the article contains the following content:

The integration of superior mech. properties and fast healing efficiency for self-healing polyurethane supramol. elastomers is challenging due to the confliction between high chain mobility for healing and high chain rigidity for mech. properties. Herein, a strategy to design a “hard-soft” hard domain by the cooperation of quadruple hydrogen bonds (HBs) in the mainchain as restriction units and single HBs in the side chain as diffusion units is reported. The resulting transparent supramol. elastomer exhibited fast self-recoverability, good puncture resistance and superior mech. properties with a tensile strength of 20.5 MPa, an extensibility of 2043.7%, a toughness of 146.1 MJ m-3 and a tear resistance of 13.8 kJ m-2. Moreover, the fast self-healing capacity (healing efficiency > 82% within 3 h under moderate condition) was realized due to the soft effects of weak HBs in the side chain on the strong HBs in the mainchain. Taking advantage of the merits of the supramol. elastomer, a flexible sensor was simply fabricated, which showed good self-repairable and stable sensing properties. Thus, the elastomer has great potential in the field of flexible electronics and wearable devices. The experimental process involved the reaction of 3-Acetyldihydrofuran-2(3H)-one(cas: 517-23-7).Application of 517-23-7

The Article related to polyurethane supramol elastomer self healing transparent puncture tear resistance, Synthetic Elastomers and Natural Rubber: Elastomer Synthesis and other aspects.Application of 517-23-7

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