摘要:
A vanadium resistant coating system resistant to high temperature vanadium attack. The system comprises a high temperature superalloy substrate. A bond coat overlies the superalloy substrate. The bond coat may be applied in multiple layers. A ceramic coating overlies the bond coat. The ceramic coating further comprises a zirconium oxide stabilized by at least one cation selected from the group consisting of Yb3+, Lu3+, Sc3+ and Ce4+, in the amounts of about 5-10 weight percent. An overcoat may overlie the ceramic coating. The overcoat may be a sacrificial layer of YSZ infiltrated with cations having an atomic radius larger than Y3+. Alternatively, the overcoat may comprise zirconium oxide stabilized by Ce4+.
摘要:
This invention provides a process for obtaining bioactive recombinant protein from inclusion bodies without unfolding it completely into random coil structure. The process comprises solubilization of inclusion body protein using urea and propanol.
摘要:
A charge pump circuit includes switch circuit modules and current modules. The number of switch circuit modules that are coupled to receive current from one of the current modules is variable. The output current of the charge pump circuit increases as more of the switch circuit modules are coupled to receive current from the current modules. The net on-resistance of the switch circuit modules decreases as more of the switch circuit modules are coupled to receive current from the current modules. Charge coupling caused by the net parasitic gate-to-drain capacitance of switching transistors in the switch circuit modules is reduced at smaller output current settings of the charge pump circuit.
摘要:
A coating system and process capable of providing erosion and corrosion-resistance to a component, particularly a steel compressor blade of an industrial gas turbine. The coating system includes a metallic sacrificial undercoat on a surface of the component substrate, and a ceramic topcoat deposited by thermal spray on the undercoat. The undercoat contains a metal or metal alloy that is more active in the galvanic series than iron, and electrically contacts the surface of the substrate. The ceramic topcoat consists essentially of a ceramic material chosen from the group consisting of mixtures of alumina and titania, mixtures of chromia and silica, mixtures of chromia and titania, mixtures of chromia, silica, and titania, and mixtures of zirconia, titania, and yttria.
摘要:
The present invention relates to a bovine VDJ cassette (BF1H1) that provides the novel ability to develop chimeric immunoglobulin molecule capable of incorporating both linear T cell epitope(s) (CDR1H and CDR2H) as well as conformational B cell epitope(s) (exceptionally long CDR3H). Further, multiple epitopes can be incorporated for development of multivalent vaccine by replacing at least a portion of an immunoglobulin molecule with the desired epitope such that functional ability of both epitope(s) and parent VDJ rearrangement is retained. The antigenized immunoglobulin incorporating both T and B epitopes of interest is especially useful for development of oral vaccines for use in humans apart from other species including cattle. The long CDR3H in BF1H1 VDJ rearrangement originates from long germline D-genes. The novel bovine germline D-genes provide unique molecular genetic marker for sustaining the D-gene pool in cattle essential for immunocompetence via selective breeding. D-gene specific DNA probe permits typing and selection of breeding cattle stock for maximum gemline D gene pool for better health and disease prevention. The bovine D-genes are unique to cattle and, therefore, provide sensitive and specific forensic analytical tool using molecular biology techniques to determine tissues suspected of bovine origin.
摘要:
The present invention provides novel gene constructs and methods for the production of transgenic cotton plants that produce oils having a range of desirable attributes, including improved oil quality, and modified fatty acid composition.
摘要:
The present invention provides novel gene constructs and methods for the production of transgenic cotton plants that produce oils having a range of desirable attributes, including improved oil quality, and modified fatty acid composition.
摘要:
The present invention relates to a bovine VDJ cassette (BF1H1) that provides the novel ability to develop chimeric immunoglobulin molecule capable of incorporating both linear T cell epitope(s) (CDR1H and CDR2H) as well as conformational B cell epitope(s) (exceptionally long CDR3H). The antigenized immunoglobulin incorporating both T and B epitopes of interest is especially useful for development of oral vaccines for use in humans apart from other species including cattle. The long CDR3H in BF1H1 VDJ rearrangement originates from long germline D-genes. The novel bovine germline D-genes provide additional opportunities for sustaining the capacity for antibody diversification in cattle essential for immunocompetence via selective breeding strategies that incorporate immunoglobulin gene markers. The novel gene elements, such as D-genes, are unique to cattle and, therefore, are useful in forensic analysis.
摘要:
3-Hydroxypyridin-4-ones of formula (I) ##STR1## in which R.sub.1 is a C.sub.3 or C.sub.4 hydroxyalkyl group in which the hydroxy group is terminally substituted on the alkyl group, R.sub.2 is methyl or ethyl and R.sub.3 and R.sub.4 are each separately hydrogen, methyl or ethyl but with the proviso that the total number of carbon atoms in R.sub.1 to R.sub.4 is no more than six, the compound optionally being in the form of a physiologically acceptable salt and/or pro-drug thereof, are of value for the treatment of conditions caused by iron dependent parasites, particularly malaria.
摘要:
The invention provides piperidine derivatives of the general formula ##STR1## or an acid-addition salt or metal salt complex thereof, in which R represents a hydrogen atom or an optionally substituted alkyl, alkenyl, alkynyl, alkoxy, cycloalkyl, aryl, arylcarbonyl, heterocyclyl or heterocyclyloxy group; R.sup.1 represents an optionally substituted alkyl, phenyl, benzyl or cycloalkyl group; R.sup.2 represents a hydrogen atom or an optionally substituted alkyl group; one of W and X represents --CH.sub.2 --, --CH.sub.2 CH.sub.2 -- or --O--, the other of W and X being --CH.sub.2 -- or --CH.sub.2 CH.sub.2 or X represents a single chemical bond; m is 0 or 1 and n represents an integer from 0 to 3; processes for their preparation; compositions containing such compounds and their use as fungicides.