Tag: M.W=300-350

Shao, Yitong published the artcileEnhancement of black and odorous water treatment coupled with accelerated lipid production by microalgae exposed to ¹²C⁶⁺ heavy-ion beam irradiation, Application of Docosahexaenoic Acid, the publication is Chemosphere (2022), 135452, database is CAplus and MEDLINE.

In this study, Auxenochlorella protothecoides (AP-CK) was selected due to its reported high growth potential in sterilized black and odorous water (SBOW). In order to improve the resource utilization level of microalgae for wastewater treatment, AP-CK was mutated using ¹²C⁶⁺ heavy-ion beam irradiation, and a high lipid-containing mutant (AP-34#) was isolated and further evaluated to treat original black and odorous water (OBOW). Compared with the wild type, the maximum removal rates of COD, NH+4-N and TP of the mutant increased by 8.12¡À 0.33%, 10.43 ¡À 0.54% and 11.97 ¡À0.16%, resp., while maximum dissolved oxygen content increased from 0 to 4.36 ¡À0.25 mg/L. Besides, the mutant lipid yield increased by 115.87 ¡À 3.22% over the wild type in OBOW. The fatty acid profile of AP-34# grown in SBOW and OBOW showed higher proportion of saturated fatty acids (C16:0 and C18:0) and valuable polyunsaturated fatty acids (mainly C20:5n3 and C22:6n3) which are more suitable for biodiesel production and value-added products, resp. This work provides a new perspective on improving the characteristics of microalgae and an innovative approach for resource-based microalgae wastewater treatment through bioremediation of black and odorous water.

Chemosphere 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 C8H11BO2, Application of Docosahexaenoic Acid.

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

Zohrevandi, Mina published the artcileA nickel nanoparticle engineered CoFe₂O₄/SiO₂-NH₂@carboxamide composite as a novel scaffold for the oxidation of sulfides and oxidative coupling of thiols, Safety of 2,2′-Dithiodibenzoic acid, the publication is RSC Advances (2021), 11(24), 14717-14729, database is CAplus and MEDLINE.

A new Ni-carboxamide complex supported on CoFe₂O₄ nanoparticles (CoFe₂O_4/SiO_2-NH₂@carboxamide-Ni) was prepared The carboxamide host material unit generated cavities that stabilized the nickel nanoparticles effectively and prevented the aggregation and separation of these particles on the surface. This compound was appropriately characterized using FT-IR spectroscopy, FE-SEM, ICP-OES, EDX, XRD, TGA anal., VSM and X-ray at. mapping. The catalytic oxidation of sulfides to give sulfoxides RS=OR¹ [R = Ph, 4-BrC₆H₄, Bn, etc.; R¹ = H, Me, Ph, etc.] and oxidative coupling of thiols to give disulfides R²S-SR² [R² = Ph, 4-MeC₆H₄, Bn, etc.] in the presence of the designed catalyst was explored as a highly selective catalyst using hydrogen peroxide as a green oxidant. The easy separation, simple workup, excellent stability of the nanocatalyst, short reaction times, non-explosive materials as well as appropriate yields of the products were some outstanding advantages of this protocol.

RSC Advances 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 Al2H32O28S3, Safety of 2,2′-Dithiodibenzoic acid.

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

Lubos, Marta published the artcileFunctional stapled fragments of human preptin of minimized length, Computed Properties of 71989-31-6, the publication is Organic & Biomolecular Chemistry (2022), 20(12), 2446-2454, database is CAplus and MEDLINE.

Preptin is a 34-amino-acid-long peptide derived from the E-domain of a precursor of insulin-like growth factor 2 (pro-IGF2) with bone-anabolic and insulin secretion amplifying properties. Here, we describe the synthesis, structures, and biol. activities of six shortened analogs of human preptin. Eight- and nine-amino-acid-long peptide amides corresponding to the C-terminal part of human preptin were stabilized by two types of staples to induce a higher proportion of helicity in their secondary structure. We monitored the secondary structure of the stapled peptides using CD. The biol. effect of the structural changes was determined afterwards by the ability of peptides to stimulate the release of intracellular calcium ions. We confirmed the previous observation that the stabilization of the disordered conformation of human preptin has a deleterious effect on biol. potency. However, surprisingly, one of our preptin analogs, a nonapeptide stabilized by olefin metathesis between positions 3 and 7 of the amino acid chain, had a similar ability to stimulate calcium ions’ release to the full-length human preptin. Our findings could open up new ways to design new preptin analogs, which may have potential as drugs for the treatment of diabetes and osteoporosis.

Organic & Biomolecular Chemistry 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, Computed Properties of 71989-31-6.

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

Nikoorazm, Mohsen published the artcileL-Arginine complex of copper on modified core-shell magnetic nanoparticles as reusable and organic-inorganic hybrid nanocatalyst for the chemoselective oxidation of organosulfur compounds, Recommanded Product: 2,2′-Dithiodibenzoic acid, the publication is Journal of the Iranian Chemical Society (2021), 18(2), 467-478, database is CAplus.

The fabrication and characterization of a stable heterogeneous nanostructure catalyst of copper immobilized on Fe₃O₄@SiO₂@L-Arginine, for the oxidation of sulfides and oxidative coupling of thiols was reported. The prepared nanocatalyst was characterized by different techniques such as FTIR, XRD, SEM, TEM and TGA. These nanoparticles were the effective catalyst for selective oxidation of sulfides and oxidative coupling of thiols using 30% H₂O₂. The suggested method offered several prominent advantages such as mild condition, use of magnetically reusable catalyst, simple workup procedure, good to high yields of products and great selectivity.

Journal of the Iranian Chemical Society 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 C14H10O4S2, Recommanded Product: 2,2′-Dithiodibenzoic acid.

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

Sergeev, Maxim E. published the artcileTitania-Catalyzed Radiofluorination of Tosylated Precursors in Highly Aqueous Medium, Product Details of C17H37NO3, the publication is Journal of the American Chemical Society (2015), 137(17), 5686-5694, database is CAplus and MEDLINE.

Nucleophilic radiofluorination is an efficient synthetic route to many positron-emission tomog. (PET) probes, but removal of water to activate the cyclotron-produced [¹⁸F]fluoride has to be performed prior to reaction, which significantly increases overall radiolabeling time and causes radioactivity loss. In this report, we demonstrate the possibility of ¹⁸F-radiofluorination in highly aqueous medium. The method utilizes titania nanoparticles, 1:1 (volume/volume) acetonitrile-thexyl alc. solvent mixture, and tetra-n-butylammonium bicarbonate as a phase-transfer agent. Efficient radiolabeling is directly performed with aqueous [¹⁸F]fluoride without the need for a drying/azeotroping step to significantly reduce radiosynthesis time. High radiochem. purity of the target compound is also achieved. The substrate scope of the synthetic strategy is demonstrated with a range of aromatic, aliphatic, and cycloaliphatic tosylated precursors.

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 C10H16O2, Product Details of C17H37NO3.

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

Thomae, David published the artcileIdentification and in vivo evaluation of a fluorine-18 rolipram analogue, [¹⁸F]MNI-617, as a radioligand for PDE4 imaging in mammalian brain, SDS of cas: 17351-62-1, the publication is Journal of Labelled Compounds and Radiopharmaceuticals (2016), 59(5), 205-213, database is CAplus and MEDLINE.

Phosphodiesterase (PDE) 4 is the most prevalent PDE in the central nervous system (CNS) and catalyzes hydrolysis of intracellular cAMP, a secondary messenger. By therapeutic inhibition of PDE4, intracellular cAMP levels can be stabilized, and the symptoms of psychiatric and neurodegenerative disorders including depression, memory loss and Parkinson’s disease can be ameliorated. Radiotracers targeting PDE4 can be used to study PDE4 d. and function, and evaluate new PDE4 therapeutics, in vivo in a non-invasive way, as has been shown using the carbon-11 labeled PDE4 inhibitor R-(-)-rolipram. Herein we describe a small series of rolipram analogs that contain fluoro- or iodo-substituents that could be used as fluorine-18 PET or iodine-123 SPECT PDE4 radiotracers. This series was evaluated with an in vitro binding assay and a 4-(fluoromethyl) derivative of rolipram, MNI-617, was identified, with a five-fold increase in affinity for PDE4 (K_d = 0.26 nM) over R-(-)-rolipram (K_d = 1.6 nM). A deutero-analog d₂-[¹⁸F]MNI-617 was radiolabeled and produced in 23% yield with high (>5 Ci/¦Ìmol) specific activity and evaluated in non-human primate, where it rapidly entered the brain, with SUVs between 4 and 5, and with a distribution pattern consistent with that of PDE4.

Journal of Labelled Compounds and Radiopharmaceuticals 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 C16H24BF4Ir, SDS of cas: 17351-62-1.

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

Xu, Xiaokai published the artcileConstruction of Carbon Dots with Color-Tunable Aggregation-Induced Emission by Nitrogen-Induced Intramolecular Charge Transfer, Quality Control of 119-80-2, the publication is Advanced Materials (Weinheim, Germany) (2021), 33(49), 2104872, database is CAplus and MEDLINE.

As one of the most promising fluorescent nanomaterials, the fluorescence of carbon dots (CDs) in solution is extensively studied. Nevertheless, the synthesis of multicolor solid-state fluorescence (SSF) CDs is rarely reported. Herein, CDs with multicolor aggregation-induced emission are prepared using amine mols., all of them exhibiting dual fluorescence emission at 480 nm (Em-1) and 580-620 nm (Em-2), which is related to the S-S bonds of dithiosalicylic acid and the conjugated structure attached to C=O/C=N bonds, resp. As a strong electron-withdrawing group, the increase of C=N content makes dual-fluorescent groups on the surface of CDs produce push and pull electrons, which determines intramol. charge transfer (ICT) between the double emission. With the increase in C=N content from 35.6% to 58.4%, the ICT efficiency increases from 8.71% to 45.94%, changing the fluorescence of CDs from green to red. The increase of ICT efficiency causes fluorescence quantum yield enhancement by nearly five times and red shift of the fluorescence peak. Finally, based on the multicolor luminescence properties induced by the aggregation of CDs, pattern encryption and white-LED devices are realized. Based on the fat solubility and strong UV absorption characteristics of CDs, fingerprint detection and leaf anti-UV hazards are applied.

Advanced Materials (Weinheim, Germany) 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 C12H14IN, Quality Control of 119-80-2.

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

Xu, Xiaokai published the artcileRed, green and blue aggregation-induced emissive carbon dots, Application In Synthesis of 119-80-2, the publication is Chinese Chemical Letters (2021), 32(12), 3927-3930, database is CAplus.

As one of the most promising fluorescent nanomaterials, carbon dots (CDs) have been extensively studied for their fluorescent properties in solution However, research on the synthesis of multicolor solid-state fluorescence (SSF) CDs (from blue to red) is rarely reported. Herein, we used o-phenylenediamine, m-phenylenediamine and p-phenylenediamine with dithiosalicylic acid (DTSA) in the solvothermal reaction using acetic acid as a solvent to obtain aggregation-induced emissive (AIE) CDs of red (620 nm), green (520 nm), and blue (478 nm), resp. XPS spectra and TEM image show that with the red-shift of luminescence, the particle size and content of C = O of the CDs gradually increases. Finally, based on the non-matrix solid-state multicolor luminescence characteristics of CDs, the application of white light LED devices is realized. Besides, based on the fat-soluble properties of CDs, fingerprint detection applications are realized.

Chinese Chemical Letters 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 C12H14IN, Application In Synthesis of 119-80-2.

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

Groendyke, Brian J. published the artcileFenton-Inspired C-H Functionalization: Peroxide-Directed C-H Thioetherification, HPLC of Formula: 119-80-2, the publication is Journal of Organic Chemistry (2019), 84(20), 13073-13091, database is CAplus and MEDLINE.

Substoichiometric iron mediates the thioetherification of unactivated aliphatic C-H bonds directed by resident silylperoxides. Upon exposure to a catalytic amount of iron(II) triflate, TIPS-protected peroxides bearing primary, secondary, and tertiary C-H sites undergo chemoselective thioetherification of remote C-H bonds with diaryl disulfides. The reaction demonstrates a broad substrate scope and functional group tolerance without the use of any noble metal additives. Mechanistic experiments suggest that the reaction proceeds through 1,5-H atom abstraction by a hydroxyl radical generated with iron.

Journal of Organic Chemistry 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 C14H10O4S2, HPLC of Formula: 119-80-2.

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

Tamoradi, Taiebeh published the artcileFe₃O₄-AMPD-Pd: A novel and efficient magnetic nanocatalyst for synthesis of sulfides and oxidation reactions, Application of 2,2′-Dithiodibenzoic acid, the publication is Polyhedron (2018), 104-109, database is CAplus.

A novel magnetic nanoparticle was synthesized with effective catalytic properties and recyclable ability. This heterogeneous nanocatalyst was identified using Fourier transform IR, scanning electron microscopies, X-ray diffraction, vibrating sample magnetometer, inductively coupled plasma at. emission spectroscopy and thermogravimetric anal. methods. The nanocatalyst was used for the synthesis of the one-pot C-S coupling synthesis of sulfide in the presence of KOH, S₈ as the sulfur source in DMSO as the solvent at 100 ¡ãC. Also, the oxidation of sulfides to sulfoxides and oxidative coupling of thiols to disulfides in the presence of the catalyst was tested. The catalyst has unique properties such as ability of magnetic separation from the reaction, high repeatability, and high thermal and chem. stability.

Polyhedron 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 C7H10O4, Application of 2,2′-Dithiodibenzoic acid.

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