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11.
Rajasekhar V. S. R. Pullabhotla Colin Southway Sreekanth B. Jonnalagadda 《Reaction Kinetics and Catalysis Letters》2008,94(2):289-299
Photolysis behavior of acetamiprid in different kinds of surfactant solutions were investigated. The results showed that acetamiprid
was prone to photolysis when exposed to the irradiation of a mercury lamp, and the photolysis kinetics fit in well with the
first-order kinetic equation. Surfactants did not participate in the acetamiprid’s photolysis process directly, whereas they
all had obvious inhibiting effects on it. 相似文献
12.
[reaction: see text] The first organocatalytic cross aldol reaction of ketones and diethyl formylphosphonate hydrate has been realized by using readily available l-prolinamide as the catalyst. Secondary alpha-hydroxyphosphonates have been synthesized in high enantioselective (up to >99% ee) and good diastereoselectivity. 相似文献
13.
Hamdan A.S. Al-Shamiri Maram T.H. Abou Kana Ahmed H.M. Elwahy 《Optics Communications》2010,283(7):1438-5338
The synthesis of new high-performance dyes and the implementation of new ways of incorporating the organic molecules into the solid host matrices have produced a great deal of activity in the field of solid-state dye lasers. In this article, the new laser dye, 2-(6-allyl-3-oxo-3H-xanthen-9-yl)-benzoic acid ethyl ester [AXBE] has been synthesized, and its chemical structure was confirmed by 1H NMR, 13C NMR, IR and elemental analysis. This new dye was covalently bonded with methyl methacrylate (MMA) and 2-hydroxy ethyl methacrylate (HEMA) copolymer backbone and evaluated as the active medium of the solid-state laser dye. Its optical properties were experimentally investigated. Amplified spontaneous emission (ASE) and photostability were studied by pumping the dye sample with 355 nm (8 ns) pulsed Nd-YAG laser. 相似文献
14.
Computational Management Science - We propose asset and liability management models in which the risk of underfunding is modelled based on the concept of stochastic dominance. Investment decisions... 相似文献
15.
Tentu Nageswara Rao Suliman Yousef AlOmar Faheem Ahmed Fadwa Albalawi Naushad Ahmad Nalla Krishna Rao M. V. Basaveswara Rao Ravi Kumar Cheedarala G. Rajasekhar Reddy Tentu Manohra Naidu 《Molecules (Basel, Switzerland)》2021,26(14)
In this article, a zirconia-based nano-catalyst (Nano-ZrO2), with intermolecular C-N bond formation for the synthesis of various benzimidazole-fused heterocycles in a concise method is reported. The robustness of this reaction is demonstrated by the synthesis of a series of benzimidazole drugs in a one-pot method. All synthesized materials were characterized using 1HNMR, 13CNMR, and LC-MS spectroscopy as well as microanalysis data. Furthermore, the synthesis of nano-ZrO2 was processed using a standard hydrothermal technique in pure form. The crystal structure of nano-ZrO2 and phase purity were studied, and the crystallite size was calculated from XRD analysis using the Debye–Scherrer equation. Furthermore, the antimicrobial activity of the synthesized benzimidazole drugs was evaluated in terms of Gram-positive, Gram-negative, and antifungal activity, and the results were satisfactory. 相似文献
16.
The magnetic properties of Nd4.5Fe77−xMnxB18.5 (x=0, 1 and 2) nanocomposites prepared by the crystallization of amorphous precursors were investigated. Addition of Mn is found to decrease the crystallization temperature of the amorphous ribbons. The intrinsic coercivity iHc and maximum energy product (BH)max increase from 2.6 kOe and 9.1 MGOe for x=0 to 3.1 kOe and 10.3 MGOe for x=1, respectively, and the remanence ratio Mr/Ms increases from 0.70 to 0.72. The effect of Mn on Curie temperature TC and the thermal stability of Mr and iHc were also studied. 57Fe Mössbauer spectra have been recorded for x=0, 1 and 2 ribbons at room temperature and site preference of the Mn atoms in Fe3B and Nd2Fe14B phases is discussed using the Mössbauer spectroscopy. 相似文献
17.
The reaction of aldehydes with homoallylic alcohols in the presence of catalytic amount of bismuth triflate in [bmim]PF6generates 4‐tetrahydropyranol derivatives in excellent yield and with high diastereoselectivity. © 2008 Wiley Periodicals, Inc. Heteroatom Chem 19:104–106, 2008; Published online in Wiley InterScience ( www.interscience.wiley.com ). DOI 10.1002/hc.20403 相似文献
18.
Maram A. Q. Al-Sayaghi Jeremy Lewis Chris Buelke 《International Journal of Polymer Analysis and Characterization》2018,23(6):566-576
Aromatic polyimides are known for their remarkable thermal and chemical properties which are greatly influenced by their precursors. In this study, we report synthesis and characterization of four different aromatic polyimides. The four different dianhydrides (ODPA, BTDA, BPDA, and PMDA) were reacted with a diamine (BisAPAF) via azeotropic imidization under same conditions. FTIR analysis confirmed the formation of aromatic polyimides and all but one polyimide (HPI-BPDA) were found to be completely soluble in common solvents. The obtained molecular weights were between 16,000 and 32,000?g/mol, glass transition temperatures were between 250?°C and 275?°C, degradation temperatures were above 550?°C, and the d-spacing values were around 5?Å. These properties are promising and can be beneficial for various applications such as thin films and membranes. 相似文献
19.
Maia I. Kelly Tyler J. Bechtel D. Rajasekhar Reddy Erome D. Hankore Jon R. BeckCliff I. Stains 《Analytica chimica acta》2015
Inhibitors of Rho-associated protein kinase (ROCK) enzymatic activity have been shown to reduce the invasive phenotype observed in metastatic hepatocellular carcinoma (HCC). We describe the design, synthesis, and evaluation of a direct probe for ROCK activity utilizing a phosphorylation-sensitive sulfonamido-oxine fluorophore, termed Sox. The Sox fluorophore undergoes an increase in fluorescence upon phosphorylation of a proximal amino acid via chelation-enhanced fluorescence (CHEF, ex. = 360 nm and em. = 485 nm), allowing for the direct visualization of the rate of phosphate addition to a peptide substrate over time. Our optimal probe design, ROCK-S1, is capable of sensitively reporting ROCK activity with a limit of detection of 10 pM and a high degree of reproducibility (Z’-factor = 0.6 at 100 pM ROCK2). As a proof-of-principle for high-throughput screening (HTS) we demonstrate the ability to rapidly assess the efficacy of a 78 member, small molecule library against ROCK2 using a robotics platform. We identify two previously unreported ROCK2 inhibitor scaffolds, PHA665752 and IKK16, with IC50 values of 3.6 μM and 247 nM respectively. Lastly, we define conditions for selectively monitoring ROCK activity in the presence of potential off-target enzymes (PKCα, PKA, and PAK) with similar substrate specificities. 相似文献
20.
C2-symmetric bisprolinamide as a highly efficient catalyst for direct aldol reaction 总被引:2,自引:0,他引:2
[reaction: see text] The catalytic activity of the prolinamide-type catalysts may be improved by introducing additional prolinamide moiety into the catalyst, while the enantioselectivity can still be maintained or further improved. A C2-symmetric bisprolinamide with two prolinamide moieties has been found to be an excellent catalyst for direct aldol reaction with more than doubled reactivity and better asymmetric induction than its monoprolinamide counterpart. 相似文献