Tag: M.W=300-350

Lunn, George published the artcileRemoval of biological stains from aqueous solution using a flow-through decontamination procedure, Safety of 5,9-Diaminobenzo[a]phenoxazin-7-ium acetate, the publication is Biotechnic & Histochemistry (1994), 69(1), 45-54, database is CAplus and MEDLINE.

Chromatog. columns filled with Amberlite XAD-16 were used to decontaminate, using a continuous flow-through procedure, aqueous solutions of the following biol. stains: acridine orange, alcian blue 8GX, alizarin red S, azure A, azure B, brilliant blue G, brilliant blue R, Congo red, cresyl violet acetate, crystal violet, eosin B, eosin Y, erythrosin B, ethidium bromide, Giemsa stain, Janus green B, methylene blue, neutral red, nigrosin, orcein, propidium iodide, rose Bengal, safranine O, toluidine blue O, and trypan blue. Adsorption was most efficient for stains of lower mol. weight (< 600). Adsorption of stain increased as the flow rate decreased; column diameter had little effect on adsorption. Adsorption of stain was greatest when finely ground resin was used, but if the resin particles were too small, column clogging occurred. Limited grinding of the resin gave increased adsorption while retaining good flow characteristics. Amberlite XAD-16 saturated with methylene blue was regenerated to its initial adsorption capacity by passing methanol through the column. The technique described provides an economical, rapid means of removing stains from aqueous solution

Biotechnic & Histochemistry published new progress about 10510-54-0. 10510-54-0 belongs to catalysis-chemistry, auxiliary class Other Aromatic Heterocyclic,Salt,Amine,Inhibitor,Inhibitor, name is 5,9-Diaminobenzo[a]phenoxazin-7-ium acetate, and the molecular formula is C18H15N3O3, Safety of 5,9-Diaminobenzo[a]phenoxazin-7-ium acetate.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Ociepa, Michal published the artcileMild and Chemoselective Phosphorylation of Alcohols Using a ¦·-Reagent, SDS of cas: 71989-31-6, the publication is Organic Letters (2021), 23(24), 9337-9342, database is CAplus and MEDLINE.

An operationally simple, scalable, and chemoselective method for the direct phosphorylation of alcs. using a P(V)-approach based on the ¦·-reagent platform is disclosed. The method features a broad substrate scope of utility in both simple and complex settings and provides access to valuable phosphorylated alcs. that would be otherwise difficult to obtain.

Organic Letters published new progress about 71989-31-6. 71989-31-6 belongs to catalysis-chemistry, auxiliary class Amino acide derivatives,pyrrolidine, name is Fmoc-Pro-OH, and the molecular formula is C20H19NO4, SDS of cas: 71989-31-6.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Gunathilaka, Buddhi E. published the artcileMarine protein hydrolysates as a substitute of squid-liver powder in diets for Pacific white shrimp (Litopenaeus vannamei), Formula: C22H32O2, the publication is Aquaculture Research (2022), 53(11), 4059-4068, database is CAplus.

This study was conducted to examine the supplementary effects of tuna hydrolyzate (TH) and shrimp hydrolyzate (SH) as squid-liver powder (SLP) replacers in a high soybean meal diet for Pacific white shrimp (Litopenaeus vannamei). A diet containing 4.49% SLP was regarded as the control diet and two other diets were prepared by supplementing 1.14% tuna hydrolyzate (TH) and 0.94% shrimp hydrolyzate (SH) (designated as SLP, TH and SH, resp.). Five replicate groups of shrimp (initial mean body weight, 0.35 ¡À 0.002 g) were fed one of the exptl. diets for 52 days. Final body weight and weight gain of shrimp fed SH and TH diets were significantly higher than those of shrimp fed SLP diet (p < 0.05). Feed conversion ratio was lower in SH group compared to that of shrimp fed other diets. Total antioxidant capacity and catalase activity were significantly higher in TH or SH group than SLP group (p < 0.05). Hemolymph glucose and triglyceride levels of shrimp fed SLP were significantly lower than those of shrimp fed TH and SH (p < 0.05). Shrimp-fed TH or SH exhibited significantly higher carcass lipid composition than shrimp-fed SLP (p < 0.05). Dry matter and protein digestibility were significantly higher in SH diet (p < 0.05). The findings in this study indicate that SH and TH can be used as beneficial feed supplements or ingredients that could replace SLP in L. vannamei diet. Optimum inclusion level of SH would be approx. 1% to completely replace SLP in L. vannamei diet containing high level of soybean meal.

Aquaculture Research published new progress about 6217-54-5. 6217-54-5 belongs to catalysis-chemistry, auxiliary class Alkenyl,Carboxylic acid,Aliphatic hydrocarbon chain,Metabolic Enzyme,RAR/RXR,Natural product, name is Docosahexaenoic Acid, and the molecular formula is C22H32O2, Formula: C22H32O2.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Traboulsi, Hassan published the artcileStructure-Based Epitope Design: Toward a Greater Antibody-SARS-CoV-2 RBD Affinity, Recommanded Product: Fmoc-Pro-OH, the publication is ACS Omega (2021), 6(47), 31469-31476, database is CAplus and MEDLINE.

Efficient COVID-19 vaccines are widely acknowledged as the best way to end the global pandemic. SARS-CoV-2 receptor-binding domain (RBD) plays fundamental roles related to cell infection. Antibodies could be developed to target RBD and represent a potential approach for the neutralization of the virus. Epitopes used to produce antibodies are generally linear peptides and thus possess multiple confirmations that do not reflect the actual topol. of the targeted part in the native protein. On the other hand, macrocyclic epitopes could constitute closer mimics of the native protein topol. and, as such, could generate superior antibodies. We demonstrated the vital effect of the size and the 3-dimensional shape of epitopes on the activity of the developed antibodies against the RBD of SARS-CoV-2. The mol. dynamics studies showed the greater stability of the cyclic epitopes compared with the linear counterparts, which was reflected in the affinity of the produced antibodies. The antibodies developed using macrocyclic epitopes showed superiority with respect to binding to RBD compared to antibodies formed from linear peptides. This study constitutes a roadmap for developing superior antibodies that could be used to inhibit the activity of SARS-CoV-2.

ACS Omega published new progress about 71989-31-6. 71989-31-6 belongs to catalysis-chemistry, auxiliary class Amino acide derivatives,pyrrolidine, name is Fmoc-Pro-OH, and the molecular formula is C11H12O4, Recommanded Product: Fmoc-Pro-OH.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Chae, Weon-Sik published the artcileHelix-coiled gold nanowires for molecular sensing, Category: catalysis-chemistry, the publication is Journal of Nanoscience and Nanotechnology (2012), 12(4), 3501-3505, database is CAplus and MEDLINE.

Helix-coiled gold nanowires were fabricated by a templating route using unique composite templates consisting of anodic aluminum oxide (AAO) nanotubular membrane and confined mesoporous silica therein. A different degree of confinement energy induces a different degree of helix curvature of confined porous silica nanochannels in an AAO, which works as a hard template for the electrochem. deposition of gold, thereby rationally enabling a different degree of helix curvature of gold nano-replicas. From surface-enhanced Raman scattering experiments, it was first found that helix-coiled gold nanowires show more distinctly enhanced mol. sensing efficiency than those from simple smooth gold nanowires, and gold nanowires with the narrower lateral width show more enhanced mol. sensing efficiency than those of thicker width helix nanowires.

Journal of Nanoscience and Nanotechnology published new progress about 10510-54-0. 10510-54-0 belongs to catalysis-chemistry, auxiliary class Other Aromatic Heterocyclic,Salt,Amine,Inhibitor,Inhibitor, name is 5,9-Diaminobenzo[a]phenoxazin-7-ium acetate, and the molecular formula is C18H15N3O3, Category: catalysis-chemistry.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Shibata, Takeaki published the artcileAbnormal male reproduction and embryonic development induced by downregulation of a phospholipid fatty acid-introducing enzyme Lpgat1 in zebrafish, Safety of Docosahexaenoic Acid, the publication is Scientific Reports (2022), 12(1), 7312, database is CAplus and MEDLINE.

Phospholipids in the membrane consist of diverse pairs of fatty acids bound to a glycerol backbone. The biol. significance of the diversity, however, remains mostly unclear. Part of this diversity is due to lysophospholipid acyltransferases (LPLATs), which introduce a fatty acid into lysophospholipids. The human genome has 14 LPLATs and most of them are highly conserved in vertebrates. Here, we analyzed the function of one of these enzymes, lysophosphatidylglycerol acyltransferase 1 (Lpgat1), in zebrafish. We found that the reproduction of heterozygous (lpgat1+/-) male mutants was abnormal. Crosses between heterozygous males and wild-type females produced many eggs with no obvious cleavage, whereas eggs produced by crosses between heterozygous females and wild-type males cleaved normally. Consistent with this, spermatozoa from heterozygous males had reduced motility and abnormal morphol. We also found that the occurrence of lpgat1 homozygous (lpgat1-/-) mutants was far lower than expected. In addition, downregulation of lpgat1 by morpholino antisense oligonucleotides resulted in severe developmental defects. Lipidomic anal. revealed that selective phospholipid species with stearic acid and docosahexaenoic acid were reduced in homozygous larvae and spermatozoa from heterozygotes. These results suggest that the specific phospholipid mol. species produced by Lpgat1 have an essential role in sperm fertilization and in embryonic development.

Scientific Reports published new progress about 6217-54-5. 6217-54-5 belongs to catalysis-chemistry, auxiliary class Alkenyl,Carboxylic acid,Aliphatic hydrocarbon chain,Metabolic Enzyme,RAR/RXR,Natural product, name is Docosahexaenoic Acid, and the molecular formula is C25H34N4O2S, Safety of Docosahexaenoic Acid.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Rand, Matthew D. published the artcilePermeabilization of Drosophila embryos for introduction of small molecules, Product Details of C18H15N3O3, the publication is Insect Biochemistry and Molecular Biology (2010), 40(11), 792-804, database is CAplus and MEDLINE.

Pharmacol. manipulations in the Drosophila embryo have been hindered by the impermeability of the eggshell. The ultimate barrier to delivery of small mol. solutes to the embryo is the waxy layer that lies beneath the external chorion layers and encases the underlying vitelline membrane of the eggshell. Conventional protocols call for heptane or octane to permeabilize the dechorionated eggshell however, these solvents are toxic and can result in low viability. Furthermore, heptane and octane require transition of the embryo between aqueous and organic phase solvents making it challenging to avoid desiccation. Here we describe an embryo permeabilization solvent (EPS) composed of D-limonene and plant-derived surfactants that is water miscible and highly effective in rendering the dechorionated eggshell permeable. EPS permeabilization enables embryo uptake of several different dyes of various mol. mass up to 995 Da. We find that the embryo undergoes an age-dependent decrease in the ability to be permeabilized in the first six to eight hours after egg laying. This apparent developmental change in the vitelline membrane contributes to the heterogeneity in permeabilization seen even among closely staged embryos. However, using fluorescent properties of Rhodamine B dye and various conditions of EPS treatment we demonstrate the ability to obtain optimally permeabilized viable embryos. We also demonstrate the ability to assess teratogenic activity of several compounds applied to embryos in vitro, using both early and late developmental endpoints. Application of the method to transgenic strains carrying GFP-reporter genes results in a robust readout of pharmacol. alteration of embryogenesis. The straightforward and rapid nature of the manipulations needed to prepare batches of permeabilized embryos has the potential of establishing the Drosophila embryo as an alternative model in toxicol. and for small mol. screening in a high-throughput format.

Insect Biochemistry and Molecular Biology published new progress about 10510-54-0. 10510-54-0 belongs to catalysis-chemistry, auxiliary class Other Aromatic Heterocyclic,Salt,Amine,Inhibitor,Inhibitor, name is 5,9-Diaminobenzo[a]phenoxazin-7-ium acetate, and the molecular formula is C18H15N3O3, Product Details of C18H15N3O3.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Zhao, Qi published the artcile“Turn-on” fluorescent probe for detection of H₂S and its applications in bioimaging, Related Products of catalysis-chemistry, the publication is Spectrochimica Acta, Part A: Molecular and Biomolecular Spectroscopy (2018), 8-12, database is CAplus and MEDLINE.

A novel fluorescent probe (named YQ-1) containing disulfide-bond coumarin derivative was developed for H₂S. In response to H₂S, YQ-1 showed remarkable fluorescent emission enhancement at 462 nm. Besides, YQ-1 exhibited higher selectivity, faster response rate, low cytotoxicity and low detection limit (0.052 ¦ÌM). Further, YQ-1 was used to detect the presence of H₂S level in living A549 cells, indicating YQ-1 has good membrane permeability and fluorescence properties.

Spectrochimica Acta, Part A: Molecular and Biomolecular Spectroscopy published new progress about 119-80-2. 119-80-2 belongs to catalysis-chemistry, auxiliary class sulfides,Carboxylic acid,Benzene, name is 2,2′-Dithiodibenzoic acid, and the molecular formula is C4H5F3N2O3S, Related Products of catalysis-chemistry.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Sadakiyo, Masaaki published the artcileDesign and Synthesis of Hydroxide Ion-Conductive Metal-Organic Frameworks Based on Salt Inclusion, SDS of cas: 17351-62-1, the publication is Journal of the American Chemical Society (2014), 136(5), 1702-1705, database is CAplus and MEDLINE.

The authors demonstrate a metal-organic framework (MOF) design for the inclusion of hydroxide ions. Salt inclusion method was applied to an alk.-stable ZIF-8 (ZIF = zeolitic imidazolate framework) to introduce alkylammonium hydroxides as ionic carriers. Tetrabutylammonium salts are immobilized inside the pores by a hydrophobic interaction between the alkyl groups of the salt and the framework, which significantly increases the hydrophilicity of ZIF-8. Also, ZIF-8 including the salt exhibited a capacity for OH^– ion exchange, implying that freely exchangeable OH^– ions are present in the MOF. ZIF-8 containing OH^– ions showed an ionic conductivity of 2.3 ¡Á 10^-8 S cm^-1 at 25¡ã, which is 4 orders of magnitude higher than that of the blank ZIF-8. This is the first example of an MOF-based hydroxide ion conductor.

Journal of the American Chemical Society published new progress about 17351-62-1. 17351-62-1 belongs to catalysis-chemistry, auxiliary class Salt,Amine, name is Tetrabutylammonium hydrogencarbonate, and the molecular formula is C17H37NO3, SDS of cas: 17351-62-1.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Nakao, Keisuke published the artcileSynthesis of Hexaazatriphenylene Charge-Transfer Complexes and Their Application in Cathode Active Materials for Lithium-Ion Batteries, Quality Control of 191-07-1, the publication is Crystal Growth & Design (2022), 22(1), 26-31, database is CAplus.

A rational strategy for constructing a packing structure with diffusion paths for lithium ions is a critical requirement in the development of organic cathode active materials. Charge-transfer (CT) complexes with columnar structures are prospective materials in this regard because the voids between the columns can serve as diffusion paths for lithium ions. In this study, four CT complexes with columnar structures were synthesized by utilizing the ¦Ð-¦Ð interactions between an electron acceptor, namely, 2,3,6,7,10,11-hexacyano-1,4,5,8,9,12-hexaazatriphenylene (HAT-CN), and various electron donors (i.e., coronene, pyrene, anthracene, and carbazole). The structures of these complexes were determined by single-crystal X-ray diffraction measurements, and their suitability for use as cathode-active materials in lithium-ion batteries was evaluated. The CT complex composed of HAT-CN and coronene (CT-2) showed a high capacity (163.6 mAh g^-1 at a c.d. of 100 mA g^-1 in the first cycle), which was attributed to the strong aromatic interactions producing a stable columnar structure.

Crystal Growth & Design published new progress about 191-07-1. 191-07-1 belongs to catalysis-chemistry, auxiliary class Electronic Materials, name is Coronene, and the molecular formula is C24H12, Quality Control of 191-07-1.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia