摘要:
A genetically engineered micro-organism having an operative metabolic pathway producing cinnamoyl-CoA and producing pinosylvin therefrom by the action of a stilbene synthase is used for pinosylvin production. Said cinnamic acid may be formed from L-phenylalanine by a L-phenylalanine ammonia lyase (PAL) which is one accepting phenylalanine as a substrate and producing cinammic acid therefrom, preferably such that if the PAL also accepts tyrosine as a substrate and forms coumaric acid therefrom, the ratio Km(phenylalanine)/Km(tyrosine) for said PAL is less than 1:1 and if said micro-organism produces a cinammate-4-hydroxylase enzyme (C4H), the ratio Kcat(PAL)/Kcat(C4H) is at least 2:1.
摘要:
A method for decoding a plurality of flash memory cells which are error correction-coded, the method may include: comparing physical values residing in the plurality of flash memory cells to a first set of decision thresholds thereby to provide a first item of comparison information for each of the plurality of cells; comparing physical values residing the plurality of flash memory cells to a second set of decision thresholds, thereby to provide a second item of comparison information for each of the plurality of cells, wherein neither of the first and second sets of decision thresholds is a subset of the other; and determining logical values for the plurality of flash memory cells by combining said first and second items of comparison information.
摘要:
A flash memory apparatus that may include a plurality of memory portions, and a controller operative to reserve for data retention purposes, for at least a first duration of time, only certain memory portions; allocate data, during said first duration of time, only to said certain memory portions, thereby to define a retired memory portion for said first duration of time; determine to copy data from a certain memory portion to a retired memory portion based upon a relationship between effective cycle counts of the certain memory portion and the retired memory portion, an effective cycle count of any memory portion is responsive to a number of erase-write cycles and to an effective duration of time the memory portion had available to recover from erase-write cycles; and copy the data from the certain memory portion to the retired memory portion.
摘要:
A method for decoding a plurality of flash memory cells which are error-correction-coded as a unit, the method comprising providing a hard-decoding success indication indicating whether or not hard-decoding is at least likely to be successful; and soft-decoding the plurality of flash memory cells at a first resolution only if the hard-decoding success indication indicates that the hard-decoding is not at least likely to be successful.
摘要:
A method, system and computer-readable medium are provided for reading information from a memory unit. A request may be received to read information from a set of memory cells in the memory unit. At least one read threshold in an initial set of read thresholds may be perturbed to generate a perturbed set of read thresholds. The set of memory cells may be read using the perturbed set of read thresholds to provide a read result. The performance of said reading may be evaluated using the perturbed set of read thresholds. The at least one read threshold may be iteratively perturbed for each sequential read operation that the read performance is evaluated to be sub-optimal.
摘要:
A genetically engineered micro-organism having an operative metabolic pathway producing cinnamoyl-CoA and producing pinosylvin therefrom by the action of a stilbene synthase is used for pinosylvin production. Said cinnamic acid may be formed from L-phenylalanine by a L-phenylalanine ammonia lyase (PAL) which is one accepting phenylalanine as a substrate and producing cinammic acid therefrom, preferably such that if the PAL also accepts tyrosine as a substrate and forms coumaric acid therefrom, the ratio Km(phenylalanine)/Km(tyrosine) for said PAL is less than 1:1 and if said micro-organism produces a cinammate-4-hydroxylase enzyme (C4H), the ratio Kcat(PAL)/Kcat(C4H) is at least 2:1.
摘要:
A metal-ceramic laminar-band multi matrix composite, intended for use in oxidizing, reductive or inert media at temperatures up to 1500.div.2800.degree. C. and a method of the manufacture is provided. The composite material contains up to 85 vol. % of an oxide component, for example, yttria, zirconia, hafnia, up to 85 vol. % of a compound devoid of oxygen, such as zirconium carbide, and 15.div.75 vol. % of a refractor metal, such as tungsten, molybdenum or chromium. Each of the above mentioned components of the composite exists in the form of a plurality of curved tapes. The tapes of every component are joined with the tapes of other components forming multilayer curved band-like chips, which are randomly interlaced in a compact 3-dimensioned pattern of the chips. The novel composites have high mechanical properties, are thermal- and crack resistant, and have a good thermal-shock and oxidation-erosion resistance at temperatures of 1200.degree. C. to 2800.degree. C.