Tag: M.W:100-200

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Exogenous proline enhances the sensitivity of Tobacco BY-2 cells to arsenate

Arsenic causes physiological and structural disorders in plants. Proline is accumulated as a compatible solute in plants under various stress conditions and mitigates stresses. Here, we investigated the effects of exogenous proline on tobacco Bright Yellow-2 (BY-2) cultured cells under AsO4- stress. Arsenate did not inhibit BY-2 cell growth at 40 and 50 muM but did it at 60 muM. Proline at 0.5 to 10 mM did not affect the cell growth but delayed it at 20 mM. At 40 muM AsO4-, neither 0.5 mM nor 1 mM proline affected the cell growth but 10 mM proline inhibited it. In the presence of AsO4-, 10 mM proline increased the number of Evans Blue-stained (dead) cells and decreased the number of total cells. Together, our results suggest that exogenous proline does not alleviate arsenate toxicity but enhances the sensitivity of BY-2 cells to arsenate.

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Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI

Application of 123-46-6, Because a catalyst decreases the height of the energy barrier, its presence increases the reaction rates of both the forward and the reverse reactions by the same amount.123-46-6, Name is Girards Reagent T, molecular formula is C5H14ClN3O. In a article£¬once mentioned of 123-46-6

Electron-deficient DNA-intercalating agents as antitumor drugs: Aza analogues of the experimental clinical agent N-[2- (dimethylamino)ethyl]acridine-4-carboxamide

A series of azaacridine (benzonaphthyridine) analogues of the drug N-[2- (dimethylamino)ethyl]acridine-4-carboxamide (DACA) (currently in clinical trial) were synthesized. These compounds showed DNA binding affinities similar to that of DACA, as determined by the fluorometric ethidium displacement assay, but were generally less potent cytotoxins against P388 leukemia in vitro. The only compounds showing higher cytotoxicity than DACA were analogues with nitro substituents at the (acridine) 1-position; by analogy with the 1-nitroacridine nitracrine, these compounds probably undergo reductive metabolism. The only azaacridine to show significant in vivo antileukemic activity was benzo[b] [1,5]nephthyridine-6-carboxamide. A possible reason for the unexpectedly low activity of these compounds (given the wide acceptability of substituents in DACA) may be their much lower lipophilicities, which are likely to result in lower rates of cell uptake.

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Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI

Chemistry is traditionally divided into organic and inorganic chemistry. Safety of N1-(2-(Dimethylamino)ethyl)-N1,N2,N2-trimethylethane-1,2-diamine. The former is the study of compounds containing at least one carbon-hydrogen bonds.In a patent£¬Which mentioned a new discovery about 3030-47-5

Strontium beta-diketonate complexes with polyamine donor ligands: The synthesis and structural characterization of [Sr(thd)2(L)]n (n = 2; L = diethylenetriamine, n = 1; L = triethylenetetramine, tetraethylenepentamine and tris(2-aminoethyl)amine) complex

Four novel [Sr(thd)2(L)]n (n = 2; L = diethylenetriamine (I), n = 1; L = triethylenetetramine (II), tetraethylenepentamine (III), and tris(2-aminoethyl)amine (IV)) complexes were synthesized by the reaction of Sr(thd)2 with corresponding polyamines in THF and characterized by FTIR, 1H NMR and single-crystal X-ray crystallography. Complex I exists as a dimmer in the solid state in which two strontium atoms are bridged by two thd ligands. Complexes II and III exist as monomers in the solid state and in both complexes, the polyamine ligands are coordinated to the central strontium atom in a meridional fashion, with the two thd ligands on opposite sides of the neutral ligand plane. Complex IV also exist as a monomer in the solid state. In this molecule, strontium atom is eight-coordinate with all of the nitrogens of the amine ligand and all oxygens of the thd ligand binding to the metal atom. The amine ligand is coordinated to one side of the metal atom and resulting in a cis-relationship. Thermogravimetric analysis shows that complexes I, II, III and IV are sufficiently volatile and sublimed without residue.

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Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI

Reference of 344-25-2, A catalyst don’t appear in the overall stoichiometry of the reaction it catalyzes, but it must appear in at least one of the elementary reactions in the mechanism for the catalyzed reaction. 344-25-2, Name is H-D-Pro-OH, molecular formula is C5H9NO2. In a Article£¬once mentioned of 344-25-2

Intranasal Administration of a Polyethylenimine-Conjugated Scavenger Peptide Reduces Amyloid-beta Accumulation in a Mouse Model of Alzheimer’s Disease

Amyloid-beta (Abeta) aggregation in the brain plays a central and initiatory role in pathogenesis and/or progression of Alzheimer’s disease (AD). Inhibiting Abeta aggregation is a potential strategy in the prevention of AD. A scavenger peptide, V24P(10-40), designed to decrease Abeta accumulation in the brain, was conjugated to polyethylenimine (PEI) and tested as a preventive/therapeutic strategy for AD in this study. This PEI-conjugated V24P(10-40) peptide was delivered intranasally, as nasal drops, to four-month-old APP/PS1 double transgenic mice for four or eight months. Compared with control values, peptide treatment for four months significantly reduced the amount of GdnHCl-extracted Abeta40 and Abeta42 in the mice’s hippocampus and cortex. After treatment for eight months, amyloid load, as quantified by Pittsburgh compound B microPET imaging, was significantly decreased in the mice’s hippocampus, cortex, amygdala, and olfactory bulb. Our data suggest that this intranasally delivered scavenger peptide is effective in decreasing Abeta accumulation in the brain of AD transgenic mice. Nasal application of peptide drops is easy to use and could be further developed to prevent and treat AD.

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Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI

Chemistry is the experimental and theoretical study of materials on their properties at both the macroscopic and microscopic levels.In a patent£¬ SDS of cas: 4730-54-5, Which mentioned a new discovery about 4730-54-5

Antiparasitic therapy

Parasitic diseases affect more than 2 billion people globally and cause substantial morbidity and mortality, particularly among the world’s poorest people. This overview focuses on the treatment of the major protozoan and helminth infections in humans. Recent developments in antiparasitic therapy include the expansion of artemisinin-based therapies for malaria, new drugs for soil-transmitted helminths and intestinal protozoa, expansion of the indications for antiparasitic drug treatment in patients with Chagas disease, and the use of combination therapy for leishmaniasis and human African trypanosomiasis.

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Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI

A catalyst don’t appear in the overall stoichiometry of the reaction it catalyzes, Recommanded Product: (1R,2R)-Cyclohexane-1,2-diamine, but it must appear in at least one of the elementary reactions in the mechanism for the catalyzed reaction. 20439-47-8, Name is (1R,2R)-Cyclohexane-1,2-diamine, molecular formula is C6H14N2. In a Article, authors is Alfonso, Ignacio£¬once mentioned of 20439-47-8

Sequential biocatalytic resolution of (¡À)-trans-cyclohexane-1,2-diamine. Chemoenzymatic synthesis of an optically active polyamine

Candida antarctica lipase-catalysed double monoaminolysis of dimethyl malonate by (¡À)-trans-cyclohexane-1,2-diamine allows the sequential resolution of the latter compound, affording an enantiopure bis(amidoester), (R,R)-3, which is subsequently transformed into an optically active polyamine, (R,R)-9.

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Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI

Chemistry is the experimental and theoretical study of materials on their properties at both the macroscopic and microscopic levels.In a patent£¬ COA of Formula: C7H19N3, Which mentioned a new discovery about 105-83-9

Alkylation of a human telomere sequence by heterotrimeric chlorambucil PI polyamide conjugates

We designed and synthesized human telomere alkylating N-methylpyrrole-N-methylimidazole (PI) polyamide conjugates (1-6). The C-type conjugates 1-3 possessed a chlorambucil moiety at the C terminus, whereas the N-type conjugates 4-6 had one of these moieties at the N terminus. The DNA alkylating activity of these conjugates was evaluated by high-resolution denaturing polyacrylamide gel electrophoresis using a 220 bp DNA fragment containing the human telomere repeat sequence 5?-(GGGTTA)4-3?/5?-(TAACCC)4-3?. C-type conjugates are designed to alkylate the G-rich-strand-containing 5?-GGGTTA-3? and N-type conjugates were designed to alkylate the complementary C-rich strand-containing 5?-TAACCC-3? sequence. The difference between conjugates 1-3 and 4-6 lies in the linker region between the polyamide moiety and chlorambucil. Conjugates 1 and 4 efficiently alkylated the 5?-GGTTAGGGTTA-3? and 5?-CCCTAACCCTAA-3? sequences, respectively, by recognizing 11 bp in the presence of distamycin A (Dist), in a heterotrimeric manner: one long alkylating polyamide conjugate (1-6) and two short partners (Dist).

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Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI

Related Products of 4062-60-6, Because a catalyst decreases the height of the energy barrier, its presence increases the reaction rates of both the forward and the reverse reactions by the same amount.4062-60-6, Name is N1,N2-Di-tert-butylethane-1,2-diamine, molecular formula is C10H24N2. In a article£¬once mentioned of 4062-60-6

Synthesis of fused tricyclic systems by thermal Cope rearrangement of furan-substituted vinyl cyclopropanes

A novel method for the stereoselective construction of hexahydroazuleno[4,5-b]furans from simple precursors has been developed. The route involves the use of our recently developed Br¡ãnsted acid catalysed cyclisation reaction of acyclic ynenones to prepare fused 1-furanyl-2-alkenylcyclopropanes that undergo highly stereoselective thermal Cope rearrangement to produce fused tricyclic products. Substrates possessing an E-alkene undergo smooth Cope rearrangement at 40 C, whereas the corresponding Z-isomers do not react at this temperature. Computational studies have been performed to explain the difference in behaviour of the E- and Z-isomers in the Cope rearrangement reaction. The hexahydroazuleno[4,5-b]furans produced by Cope rearrangement have potential as advanced intermediates for the synthesis of members of the guaianolide family of natural products.

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Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI

Application of 4408-64-4, The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature.4408-64-4, Name is 2,2′-(Methylazanediyl)diacetic acid, molecular formula is C5H9NO4. In a Patent£¬once mentioned of 4408-64-4

Methods to Place Fluid Loss Materials

A method of treating a subterranean formation includes providing a treatment fluid comprising a crosslinkable polymer prepared by a redox reaction with vinyl phosphonic acid monomers or polymers and a polysaccharide, and at least one of a hydrolysable in-situ acid generator and a chelating agent, providing a carrier fluid comprising a brine, providing a metal crosslinker, placing all into a formation, allowing the polymer of to crosslink, and allowing the crosslinked polymer to become uncrosslinked. A wellbore fluid includes a crosslinkable polymer prepared by a redox reaction with vinyl phosphonic acid monomers or polymers and hydroxyethyl cellulose; at least one of a hydrolysable in-situ acid generator, a chelating agent, and mixtures thereof; a carrier fluid comprising a brine; and a metal crosslinker.

A reaction mechanism is the microscopic path by which reactants are transformed into products. Each step is an elementary reaction. In my other articles, you can also check out more blogs about 4408-64-4

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Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI

Chemistry is traditionally divided into organic and inorganic chemistry. name: 2,2′-(Methylazanediyl)diacetic acid. The former is the study of compounds containing at least one carbon-hydrogen bonds.In a patent£¬Which mentioned a new discovery about 4408-64-4

Development of PVA/MIDA based hybrid cation exchange membranes for alkali recovery via Diffusion Dialysis

We report poly vinyl alcohol (PVA) based hybrid membranes composed of methyl iminodiacetic acid (MIDA) and tetraorthoethoxysilane (TEOS) prepared by classical sol-gel process. MIDA was prepared via N-methylation of iminodiacetic acid and then successfully incorporated into the PVA backbone. The concentration of MIDA with respect to PVA was varied from 10 to 40 wt%. These hybrid membranes showed water uptake (WU) in the range of 106-125%, ion exchange capacities (IECs) of 1.14-2.13 mmol/g, dialysis coefficient (UOH) from 0.009 to 0.012 m/h as well as selectivity (S) from 16.0 to 19.9. These obtained results revealed that MIDA. It controls the hydrophilicity and ion exchange capacity by providing channels for the transportation of ions through carboxylate sites. PVA/MIDA hybrid membranes also showed good thermal stability with the initial thermal decomposition temperature (IDT) ranging around 150-160 C and excellent mechanical properties such as tensile strength (TS) of 9-25 MPa and elongation at break (Eb) of 32-150%.

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Reference£º
Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI