Tag: M.W=100-150

Matsuo, Kimiko published the artcileThe effects of polyamines on the melting of poly(inosinic acid) plus poly(cytidylic acid) complex in solution, Synthetic Route of 10517-44-9, the publication is Bulletin of the Chemical Society of Japan (1966), 39(2), 347-52, database is CAplus and MEDLINE.

The thermal transition profile (melting profile) of the double-helical complex of poly(inosinic acid) and poly(cytidylic acid), poly (I + C), into random coils in solution was examined by observation of the absorbance at 248 m¦Ì. Increased cation concentrations raised the transition temperature (Tm) and made the transition more rapidly reversible. CH₃NH₃⁺, Na⁺, NH₄⁺, and Mg⁺⁺ were increasingly effective in that order. Diamines of the type ⁺H₃N-(CH₂)_n-NH₃₊ also raised Tm, the most effective being that with n = 3. Spermidine was even more effective, and spermine the most effective compound tested. Actinomycin D had little effect on Tm. Poly-L-lysine formed a complex with poly (I + C) with a stoichiometric molar ratio of NH₂😛 = 0.5:1.

Bulletin of the Chemical Society of Japan published new progress about 10517-44-9. 10517-44-9 belongs to catalysis-chemistry, auxiliary class Salt,Amine,Aliphatic hydrocarbon chain, name is Propane-1,3-diamine dihydrochloride, and the molecular formula is C3H12Cl2N2, Synthetic Route of 10517-44-9.

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

Guercio, Angelica M. published the artcileStructural and functional analyses explain Pea KAI2 receptor diversity and reveal stereoselective catalysis during signal perception, Computed Properties of 63-68-3, the publication is Communications Biology (2022), 5(1), 126, database is CAplus and MEDLINE.

KAI2 proteins are plant ¦Á/¦Â hydrolase receptors which perceive smoke-derived butenolide signals and endogenous, yet unidentified KAI2-ligands (KLs). The number of functional KAI2 receptors varies among species and KAI2 gene duplication and sub-functionalization likely plays an adaptative role by altering specificity towards different KLs. Legumes represent one of the largest families of flowering plants and contain many agronomic crops. Prior to their diversification, KAI2 underwent duplication resulting in KAI2A and KAI2B. Here we demonstrate that Pisum sativum KAI2A and KAI2B are active receptors and enzymes with divergent ligand stereoselectivity. KAI2B has a higher affinity for and hydrolyzes a broader range of substrates including strigolactone-like stereoisomers. We determine the crystal structures of PsKAI2B in apo and butenolide-bound states. The biochem., structural, and mass spectra analyses of KAI2s reveal a transient intermediate on the catalytic serine and a stable adduct on the catalytic histidine, confirming its role as a bona fide enzyme. Our work uncovers the stereoselectivity of ligand perception and catalysis by diverged KAI2 receptors and proposes adaptive sensitivity to KAR/KL and strigolactones by KAI2B.

Communications Biology published new progress about 63-68-3. 63-68-3 belongs to catalysis-chemistry, auxiliary class Natural product, name is (S)-2-Amino-4-(methylthio)butanoic acid, and the molecular formula is C5H11NO2S, Computed Properties of 63-68-3.

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

Dickey, J. B. published the artcileFluorinated aminoanthraquinone dyes, Safety of 1,1,1-Trifluoropropan-2-amine, the publication is Industrial and Engineering Chemistry (1956), 209-13, database is CAplus.

A new series of pink to violet fluorinated aminoanthraquinone dyes for cellulose acetate, having in some cases enhanced fastness to light and gas, was prepared by replacing one OH group of quinizarin with a fluoroalkylamino group. Fluoroalkylamine intermediates, which were prepared by the reaction of fluoroalkyl halides with NH₄OH, include 2,2,2-trifluoroethylamine, b. 35-6¡ã, 2,2-difluoroethylamine, b. 68-9¡ã, 2,2,2′,2′-tetrafluorodiethylamine, b. 122-3¡ã, 3,3-difluoropropylamine, b. 92-4¡ã, n_D²⁰ 1.3650, 3,3,3′,3′-tetrafluorodipropylamine, b₅₀ 91-4¡ã, n_D²⁰ 1.3744, 2,2-difluoropropylamine, b. 76-7¡ã, n_D²⁵ 1.3622, 2,2,2-trifluoro-1-methylethylamine, b. 46-7¡ã, n_D²⁰ 1.3210, 3,3,3-trifluoropropylamine, b. 67¡ã, n_D²⁰ 1.3316, and 4,4-difluoropentylamine, b. 125-30¡ã, n_D²⁵ 1.3864. The dyes which were prepared include 1-hydroxy-4-(2,2,2-trifluoroethylamino)anthraquinone, m. 158-60¡ã, 1-(2,2-difluoroethylamino)-4-hydroxyanthraquinone, m. 141-2¡ã, 1,4-bis(2,2-difluoroethylamino)anthraquinone, m. 242-3¡ã, 1-(2,2-difluoropropylamino)-4-hydroxyanthraquinone, m. 135-8, 1-hydroxy-4-(2,2,2-trifluoro-1-methylethylamino)anthraquinone, m. 143-5¡ã, 1-(3,3-difluoropropylamino)-4-hydroxyanthraquinone, and 1-(4,4-difluoropentylamino)-4-hydroxyanthraquinone, m. 128-30¡ã. Another series of dyes can be prepared by the reaction of 1-amino-4-bromo-2-trifluoromethylanthraquinone with a series of o-and p-(hydroxypolyethoxy)anilines. These dye cellulose acetate bright-blue shades and have excellent light-fastness and good resistance to gas fading. Intermediates prepared for this series include 1-chloro-2-methylanthraquinone, m. 158-9.5¡ã, 1-chloro-2-trichloromethylanthraquinone, m. 203-5¡ã, 1-chloro-2-trifluoromethylanthraquinone, m. 208¡ã, 1-amino-2-trifluoromethylanthraquinone, m. 144-6¡ã, and 1-amino-4-bromo-2-trifluoromethylanthraquinone, m. 175-7¡ã. The dye which was prepared was 1-amino-4-{p-{2-{2-[2-(2-hydroxyethoxy)ethoxy]ethoxy}ethoxy}anilino}-2-trifluoro-methylanthraquinone, m. 110-15¡ã.

Industrial and Engineering Chemistry published new progress about 421-49-8. 421-49-8 belongs to catalysis-chemistry, auxiliary class Trifluoromethyl,Fluoride,Amine,Aliphatic hydrocarbon chain, name is 1,1,1-Trifluoropropan-2-amine, and the molecular formula is C3H6F3N, Safety of 1,1,1-Trifluoropropan-2-amine.

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

Calixto-Rodriguez, M. published the artcileX-ray diffraction and compositional studies of AgInS₂ thin films obtained by spray pyrolysis, Name: 1,1-Dimethylthiourea, the publication is Journal of Materials Science (2008), 43(21), 6848-6852, database is CAplus.

Silver indium sulfide (AgInS₂) thin films have been prepared by the spray pyrolysis technique using silver acetate, indium acetate, and N,N-dimethylthiourea as precursor compounds Depending on the film preparation conditions, AgInS₂ thin films are obtained which could be candidates to be used in photovoltaic devices. X-ray diffraction and energy dispersive spectroscopy compositional studies were done on films formed at different substrate temperatures (T_s) and Ag:In:S ratios in the starting solutions When Ag:In:S ratios are 1:1:1, 1:0.25:2, and 1:1:2, x-ray diffraction patterns of the thin films indicated that the crystallog. structure is mainly chalcopyrite AgInS₂. An addnl. phase, acanthite Ag₂S, appeared when the depositions where done at low T_s. Energy dispersive spectroscopy anal. showed that AgInS₂ films near stoichiometric composition were obtained by using an at. ratio of Ag:In:S = 1:1:2 in the starting solution and T_s = 400¡ã.

Journal of Materials Science published new progress about 6972-05-0. 6972-05-0 belongs to catalysis-chemistry, auxiliary class Thiourea,Amine,Aliphatic hydrocarbon chain,Amide, name is 1,1-Dimethylthiourea, and the molecular formula is C3H8N2S, Name: 1,1-Dimethylthiourea.

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

Heilmann, Michael published the artcileA Modular Phosphorylated Glycoluril-Derived Molecular Tweezer for Potent Binding of Aliphatic Diamines, Quality Control of 10517-44-9, the publication is Chemistry – A European Journal (2019), 25(56), 12900-12904, database is CAplus and MEDLINE.

A glycoluril-based mol. tweezer I (R = EtO₂C) was prepared; its binding to monoalkylammonium and alkyldiammonium salts was determined Both the hydrophobic cavity and the phosphate groups of I contribute to its binding of ammonium salts; bulkier mols. and mols. bearing neg. charged groups such as carboxylates in amino acids bind less tightly due to steric interference and Coulombic repulsion, resp. The narrow cavity of I and ionic interactions between the phosphate groups of I and ammonium guests favor the binding of aliphatic diamines.

Chemistry – A European Journal published new progress about 10517-44-9. 10517-44-9 belongs to catalysis-chemistry, auxiliary class Salt,Amine,Aliphatic hydrocarbon chain, name is Propane-1,3-diamine dihydrochloride, and the molecular formula is C3H12Cl2N2, Quality Control of 10517-44-9.

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

Zhang, K. M. published the artcileROS Produced via BsRBOHD Plays an Important Role in Low Temperature-Induced Anthocyanin Biosynthesis in Begonia semperflorens, Recommanded Product: 1,1-Dimethylthiourea, the publication is Russian Journal of Plant Physiology (2020), 67(2), 250-258, database is CAplus.

Low temperature (LT) is an important elicitor that triggers anthocyanin biosynthesis. To investigate whether the reactive oxygen species (ROS) produced via RBOH are involved in this process, we analyzed the function and mechanism of ROS produced via RBOH during LT-induced anthocyanin biosynthesis in Begonia semperflorens Link & Otto. The results showed that BsRBOHD transcription was upregulated in LT-grown seedlings at the 3rd hour, which was followed by the upregulation of anthocyanin-biosynthesis genes at the 5-9th hour, leading to anthocyanin accumulation on the 2nd day. The LT-induced increases in ROS production, BsRBOHD and anthocyanin-biosynthesis gene transcription, and anthocyanin content were abolished by the pre-treatment of seedlings with DPI [an inhibitor of nicotinamide adenine nucleoside phosphorylase (NADPH) oxidase or DMTU (a H₂O₂ scavenger)], but were promoted by pre-treatment with NADPH (a substrate of NADPH oxidase). Changes in the chlorophyll fluorescence parameters showed that pre-treatment of DPI or DMTU alleviated the LT-induced decrease in the seedling chlorophyll content and a/b ratio, which subsequently alleviated the LT-induced decreases in the ABS/CSm, TRo/CSm, RC/CSm, ETo/CSm and REo/CSm values. In contrast, NAPDH pre-treatment intensified these changes. Therefore, we suggest that ROS produced via BsRBOHD may be involved in the LT-induced anthocyanin biosynthesis by strengthening the overaccumulation of ROS produced by the overexcitation of PSII reaction centers and overflux from [Formula Omitted] to NADP⁺ in B. semperflorens.

Russian Journal of Plant Physiology published new progress about 6972-05-0. 6972-05-0 belongs to catalysis-chemistry, auxiliary class Thiourea,Amine,Aliphatic hydrocarbon chain,Amide, name is 1,1-Dimethylthiourea, and the molecular formula is C13H10F2, Recommanded Product: 1,1-Dimethylthiourea.

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

Jiang, Hui published the artcileComparative and phylogenetic analyses of six Kenya Polystachya (Orchidaceae) species based on complete chloroplast genome sequences, Computed Properties of 63-68-3, the publication is BMC Plant Biology (2022), 22(1), 177, database is CAplus and MEDLINE.

Polystachya Hook. is a large pantropical orchid genus (c. 240 species) distributed in Africa, southern Asia and the Americas, with the center of diversity in Africa. Previous studies on species of this genus have not obtained the complete chloroplast genomes, structures and variations. Addnl., the phylogenetic position of the genus in the Orchidaceae is still controversial and uncertain. Therefore, in this study, we sequenced the complete plastomes of six Kenya Polystachya species based on genome skimming, subjected them to comparative genomic anal., and reconstructed the phylogenetic relationships with other Orchidaceae species. The results exhibited that the chloroplast genomes had a typical quadripartite structure with conserved genome arrangement and moderate divergence. The plastomes of the six Polystachya species ranged from 145,484 bp to 149,274 bp in length and had an almost similar GC content of 36.9-37.0%. Gene annotation revealed 106-109 single-copy genes. In addition, 19 genes are duplicated in the inverted regions, and 16 genes each possessd one or more introns. Although no large structural variations were observed among the Polystachya plastomes, about 1 kb inversion was found in Polystachya modesta and all 11 ndh genes in the Polystachya plastomes were lost or pseudogenized. Comparative anal. of the overall sequence identity among six complete chloroplast genomes confirmed that for both coding and non-coding regions in Polystachya, SC regions exhibit higher sequence variation than IRs. Furthermore, there were various amplifications in the IR regions among the six Polystachya species. Most of the protein-coding genes of these species had a high degree of codon preference. We screened out SSRs and found seven relatively highly variable loci. Moreover, 13 genes were discovered with significant pos. selection. Phylogenetic anal. showed that the six Polystachya species formed a monophyletic clade and were more closely related to the tribe Vandeae. Phylogenetic relationships of the family Orchidaceae inferred from the 85 chloroplast genome sequences were generally consistent with previous studies and robust. Our study is the initial report of the complete chloroplast genomes of the six Polystachya species, elucidates the structural characteristics of the chloroplast genome of Polystachya, and filters out highly variable sequences that can contribute to the development of DNA markers for use in the study of genetic variability and evolutionary studies in Polystachya. In addition, the phylogenetic results strongly support that the genus of Polystachya is a part of the tribe Vandeae.

BMC Plant Biology published new progress about 63-68-3. 63-68-3 belongs to catalysis-chemistry, auxiliary class Natural product, name is (S)-2-Amino-4-(methylthio)butanoic acid, and the molecular formula is C5H11NO2S, Computed Properties of 63-68-3.

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

Huang, Tzou-Chi published the artcileDiallyl disulphide, but not diallyl sulphide, increases leucocyte function-associated antigen-1 expression and cellular adhesion in monocytes, Quality Control of 6972-05-0, the publication is Food Chemistry (2010), 120(1), 113-120, database is CAplus.

A steam distillation process at pH 9 was conducted to prepare garlic oil for food supplement. A garlic oil predominant in bioactive diallyl monosulfide (8.9%), diallyl disulfide (56.9%) diallyl trisulfide (7.6%) and diallyl tetrasulfide (2.6%) was obtained from peeled garlic cloves. The adhesion mol. leukocyte function-associated antigen-1 (LFA-1) mediates leukocyte adhesion and migration during immune responses. In this study, we investigated the effects of diallyl sulfide (DAS) and diallyl disulfide (DADS) on LFA-1 expression, cell adhesion and migration in the U937 and peritoneal macrophages from mice. After treatment, DADS, but not DAS, elevated the expression of LFA-1 in a dose- and time-dependent manner in U937 cells and peritoneal macrophages. Moreover, LFA-1 and intracellular adhesion mol.-1 (ICAM-1)-mediated adhesion also was increased by DADS in a dose- and time-dependent manner. After DADS treatment, LFA-1 clustering also increased on U937 surface. In contrast, there was no significant difference in migration of U937 cells between DADS treatment and no treatment. This study indicates the DADS, but not DAS, regulates immune responses by modulating LFA-1 expression, clustering and LFA-1-mediated adhesion in monocytes, evidences that DADS acts as an immune regulator of adhesion mols. during immune responses.

Food Chemistry published new progress about 6972-05-0. 6972-05-0 belongs to catalysis-chemistry, auxiliary class Thiourea,Amine,Aliphatic hydrocarbon chain,Amide, name is 1,1-Dimethylthiourea, and the molecular formula is C3H8N2S, Quality Control of 6972-05-0.

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

Beger, J. published the artcilePolyfunctional N-substituted surfactants. I. Nucleophilic substitutions with bis(chloronitroso) compounds. 2. Reactions with thiourea, substituted thioureas, salts and esters of dithiocarbamic acid, and mercaptoheterocyclic compounds, Name: 1,1-Dimethylthiourea, the publication is Journal fuer Praktische Chemie (Leipzig) (1979), 321(2), 249-59, database is CAplus.

Reaction of ONCHR¹CHClR² [I; R¹ = H, Me; R² = Me, C₁₁H₂₃, Ph; R¹R² = (CH₂)_n (n = 4, 6, 10), etc.] with R³R⁴NCSNH₂ (R³ = H, Me; R⁴ = H, Me, allyl, etc.) gave the thiazoles II via R³R⁴NC(:NH)SCHR²CR¹:NOH, whereas reaction of I [R¹R² = (CH₂)₄] with (PhNH)₂CS gave III. H₂NCS₂^–NH₄⁺ reacted with I to give 4-thiazoline-2-thiones, and esters of dithiocarbamic acids gave 2-(alkylthio)thiazoles. Reaction of I with mercapto heterocycles gave IV (R⁵ = 2-benzoxazolyl, 2-benzimidazolyl, 1,2,4-thiazol-3-yl; m = 1, 4, 8).

Journal fuer Praktische Chemie (Leipzig) published new progress about 6972-05-0. 6972-05-0 belongs to catalysis-chemistry, auxiliary class Thiourea,Amine,Aliphatic hydrocarbon chain,Amide, name is 1,1-Dimethylthiourea, and the molecular formula is C3H8N2S, Name: 1,1-Dimethylthiourea.

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

Koculi, Eda published the artcileCounterion Charge Density Determines the Position and Plasticity of RNA Folding Transition States, Computed Properties of 10517-44-9, the publication is Journal of Molecular Biology (2006), 359(2), 446-454, database is CAplus and MEDLINE.

The self-assembly of RNA structure depends on the interactions of counterions with the RNA and with each other. Comparison of various polyamines showed that the tertiary structure of the Tetrahymena ribozyme is more stable when the counterions are small and highly charged. By monitoring the folding kinetics of the ribozyme as a function of polyamine concentration, we now find that the charge d. of the counterions determines the positions of the folding transition states. The transition state ensemble (TSE) between U and N moves away from the native state as the counterion valence and charge d. increase, as predicted by the Hammond postulate. The TSE is broader and less structured when the RNA is refolded in polyamines rather than Mg²⁺. That the charge d. of the counterions determines the plasticity of the TSE demonstrates the importance of interactions among condensed counterions for the self-assembly of RNA structures. We propose that the major barrier to RNA folding is dominated by entropy changes when counterion charge d. is low and enthalpy differences when it is high.

Journal of Molecular Biology published new progress about 10517-44-9. 10517-44-9 belongs to catalysis-chemistry, auxiliary class Salt,Amine,Aliphatic hydrocarbon chain, name is Propane-1,3-diamine dihydrochloride, and the molecular formula is C3H12Cl2N2, Computed Properties of 10517-44-9.

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