搜索结果: 1-15 共查到“工学 Reactions”相关记录36条 . 查询时间(0.102 秒)
Chemical reactions are happening around us all the time – it’s obvious when you think about it, but how many of us do when we start a car, cook an egg, or fertilize the lawn?
As part of Ryan Pinard ’25’s summer research project, he’s hoping to create a chemical sample that’s never existed before —with a cavity that could hold liquid between two reflective surfaces. The sam...
Bio-inspired nano-catalyst guides chiral reactions（图）
Bio-inspired nano-catalyst guides chiral reactions
2019/11/22
Many medicines are twisted molecules with two mirror image versions, but the body uses only one. Inspired by photosynthetic bacteria, a team funded by a number of NSF research awards has built a catal...
The 2017 GRC on Chemical Reactions at Surfaces will be held in Il Ciocco, Tuscany in Italy during February 5-10, 2017. The conference will convene an interdisciplinary group of world-recognized expert...
Poly(vinyl chloride)-supported Pd(Ⅱ) complex as an efficient catalyst for Heck and Cu-free Sonogashira reactions under aerobic conditions
Heck reaction Sonogashira reaction Aryl halide Poly(vinyl chloride)-anchored palladium(Ⅱ) dithizone complex
2014/3/8
A novel poly(vinyl chloride)-supported Pd complex was found to be a highly active catalyst for the Heck and Sonogashira reactions of aryl halides under aerobic conditions. The complex is thermally sta...
A succinimide-N-sulfonic acid catalyst for acetylation reactions in absence of a solvent（图）
Succinimde-N-sulfonic acid Protection Acetylation Chemoselective reaction Solvent-free condition
2013/9/27
A small amount of succinimide-N-sulfonic acid efficiently catalyzed the acetylation of a variety alcohols, phenols, thiols, amines and aldehydes with acetic anhydride at room temperature under solvent...
Nano-Fe3O4 Encapsulated-Silica Particles Bearing Sulfonic Acid Groups as a Magnetically Separable Catalyst for Highly Efficient Knoevenagel Condensation and Michael Addition Reactions（图）
magnetic nanoparticle silica Knoevenagel condensation Michael addition cyclic diketone
2013/10/4
Sulfonic acid-functionalized silica-coated nano-Fe3O4 particles (Fe3O4@SiO2-SO3H) have been prepared as a novel heterogeneous acid using a facile process. The material was subsequently identified as a...
A Simple and Environmentally Benign Protocol for Biginelli Reactions Catalyzed by Silica-Bonded S-Sulfonic Acid（图）
Biginelli reaction silica-bonded S-sulfonic acid dihydropyrimidinone
2013/10/5
A protocol for the synthesis of 3,4-dihydropyrimidin-2(1H)-ones and -thiones was developed by means of a three-component condensation of an aldehyde, a β-dicarbonyl compound, and urea or thiourea in a...
Nano Silica with High Surface Area from Rice Husk as a Support for 12-Tungstophosphoric Acid: An Efficient Nano Catalyst in Some Organic Reactions（图）
amorphous silica heteropolyacid heterogeneous catalysis nano catalyst rice husk
2013/10/5
Nano silica was prepared from rice husk with high surface area. X-ray diffraction (XRD) pattern showed that the amorphous form of silica was produced. Chemical composition of the nano silica was estim...
Catalytic Activity of Dual Metal Cyanide Complex in Multi-component Coupling Reactions（图）
dual metal cyanide multi-component coupling reaction acid catalyst
2013/10/11
Several dual metal cyanide catalysts were prepared from potassium ferrocyanide, metal chloride (where metal = Zn2+, Mn2+, Ni2+, Co2+ and Fe2+), t-butanol (complexing agent) and PEG-4000 (co-complexing...
Adverse Drug Reactions Reported in the German Democratic Republic: A Retrospective Analysis of Reports to the WHO-ADR Database
Pharmacovigilance, Spontaneous Reporting Systems, VigiBase, German Democratic Republic
2013/1/28
The German Democratic Republic (GDR) joined the WHO collaboration on drug safety in 1983 in order to strengthen their national pharmacovigilance system. We aim to characterize adverse drug reaction (A...
Cross sections for proton-induced reactions on Pd isotopes at energies relevant for the gamma process
Cross sections proton-induced reactions Pd isotopes energies relevant
2011/7/21
Proton-activation reactions on natural and enriched palladium samples were investigated via the activation technique in the energy range of E_p=2.75 MeV to 9 MeV, close to the upper end of the respect...
Diffusion-mediated geminate reactions under excluded volume interactions
Diffusion-mediated geminate reactions excluded volume interactions
2011/9/9
In this paper, influence of crowding by inert particles on the geminate reaction kinetics is theoretically investigated. Time evolution equations for the survival probability of a geminate pair are de...
Normalization discrepancies in photoproduction reactions
Normalization discrepancies photoproduction reactions
2011/7/21
Recent CLAS photoproduction results using a tagged bremsstrahlung photon beam for the ground-state pseudoscalar meson photoproduction channels ($K^+ \Lambda$, $K^+ \Sigma^0$, $\eta p$, $\pi^+ n$ and $...
Reply to the comments by I. Angeli and J. Csikai on : 'Cross sections of neutron-induced reactions'
I. Angeli J. Csikai neutron-induced reactions Nuclear Theory
2011/10/11
Abstract: Comments by Dr. I. Angeli and Dr. J. Csikai raise concerns and questions regarding omission of references, proper name of the model, energy dependence of the radius and average chord length ...