摘要:
A process for the cyclopropanation of a substituted alkene, comprising the reaction of the alkene with a carbenoide, generated from dibromomethane and a tri-(C2-C8)-alkyl aluminium compound, in the presence of a catalytic amount of a metal compound selected from the group consisting of Lewis acids, metallocenes and metal carbonyl complexes. The process advantageously uses transition metal compounds as catalysts and the dibromomethane can be recovered.The process is especially useful for the preparation of ingredients for the flavour and fragrance industry.
摘要:
A pressure-sensitive adhesive based on at least 50% of one or more block copolymers, at least one block copolymer being composed at least in part on the basis of (meth)acrylic acid derivatives, the at least one block copolymer comprising at least the unit P(A)-P(B)-P(A), comprising at least one polymer block P(B) and at least two polymer blocks P(A), where P(A) independently of one another represent homopolymer or copolymer blocks made up of monomers of group A, the (co)polymer blocks P(A) each having a softening temperature in the range from 0° C. to +175° C., P(B) represents a homopolymer or copolymer block comprising monomers of group B, the (co)polymer block P(B) having a softening temperature in the range from −130° C. to +10° C., and the (co)polymer blocks P(A) and P(B) are not homogeneously miscible with one another at 25° C., characterized in that the adhesive has a refractive index nd,a of nd,a≧1.52 at 25° C., at least one of the (co)polymer blocks P(A) have a refractive index nd,A of nd,A≧1.58 at 25° C., and the (co)polymer block P(B) has a refractive index nd,B of nd,B≧1.43 at 25° C.
摘要:
The invention relates to a spectroscopic arrangement and a method for combining devices for measuring material concentrations NIR associated with a spectroscopic evaluation of glass fiber and fitted with fibers Bragg gratings (FBG) for measuring temperature profiles.
摘要:
A process for producing iron metal and slag by smelting iron-containing source material, having iron present as oxide and/or a partially metalized state, in a reactor containing a molten bath comprising or having a slag phase, utilises injection of fuel/reductant and oxygen-containing gas into the slag, by at least one top-submerged lance, to generate heating and reducing conditions in at least one reducing region in the bath. The source material is fed to the reactor, together with additional reductant and with flux, at or adjacent to the at least one reducing region, to subject the source material to smelting reduction which generates combustion gases comprising CO and H2. The rates of injection of the oxygen-containing gas and fuel/reductant by said at least one lance are controlled to achieve required, sufficient reducing conditions; and, in the reactor above the bath, the combustion gases generated by the smelting are post-combusted. The controlling of step (c) is conducted to result in the injected oxygen-containing gas having an oxygen content of from about 40 volume % to about 100 volume % and sufficient for a degree of combustion in excess of 60 wt % of the fuel/reductant injected by the at least one lance.
摘要:
The present invention is directed to an acidic hard surface treatment composition which provides a cleaning and disinfecting benefit comprising: an acidic constituent which comprises water soluble organic acid; at least one anionic surfactant constituent; at least one nonionic surfactant constituent; at least one organic solvent constituent; optionally one or more further constituents and the balance, water. The compositions exhibit surprising efficacy against various gram positive and gram negative type pathogenic bacteria, as well as against fungi in the absence of known cationic quaternary ammonium compounds known to be effective against pathogenic bacteria, as well as other known-art antimicrobial constituents and bleach are excluded.
摘要:
The invention relates to a method for the production of a metallic substrate having a biocompatible surface and to the substrate that is produced by means of said method. The method comprises treatment of a metal, i.e., Ti, Ti alloys with Al, V, Ta, Nb, Ni, Fe, Mo or mixtures thereof, Ta, Ta alloys with Fe, Al, Cr, stainless steel, with a melt of calcium nitrate and an additional component which is an oxygen salt of Na, K, Li, Mg and mixtures thereof, said treatment being effected at 180-480 ° C. for 0.1 to 12 hours. A substrate is obtained, wherein the overall layer thickness ranges from 10 to below 1600 nm and the fatigue strength of the substrate is in the same fatigue strength range as that of an untreated substrate at equal number of vibrations N.
摘要:
A method for constructing a high rise building having a core and a residence space around the core, the method including (a) installing a steel-frame pillar on a shaft portion of the core; (b) connecting a girder to the steel-frame pillar, the girder includes an anchor-connecting member to which a steel-frame beam is connected, a portion of the anchor-connecting member being buried in a core wall; (a) assembling the steel-frame beam on the anchor-connecting member; (d) arranging reinforcing bars in a deck plate or a slab type mold installed on the steel-frame beam, and in the core wall; and (e) applying a slab concrete and a core concrete simultaneously or in this order. The quality of the core and slab structure is improved, while providing the construction safety and saving the construction costs.
摘要:
A liquid cleaning composition and a solid state catalyst are provided in combination. The solid state catalyst causes a chemical reaction in the liquid cleaning composition, when the liquid cleaning composition is brought into contact with it. The chemical reaction may increase the oxidising power of the liquid cleaning composition, or change its pH, or cause gas evolution, or release heat.
摘要:
The present invention provides an improved method for gene delivery in eukaryotic cells by electroporation, preferably in human hematopoietic cells, particular dendritic cells. The method of the invention is superior to lipofection and passive pulsing of mRNA and to electroporation of plasmid cDNA for gene delivery, including tumor antigen loading of dendritic cells.