摘要:
A gas sensor element having an element body, the element body including: a ceramic heater having ceramic layers and a heater element embedded in the ceramic layers; and a solid electrolyte layer including a detection section covered by a pair of electrodes, the solid electrolyte layer being laminated together with the ceramic heater. Furthermore, the element body has a width at a front portion including the detection section smaller than at a rear portion, and at least both side edge faces of the front portion of the element body are covered with a porous layer.
摘要:
A gas sensor element having an element body, the element body including: a ceramic heater having ceramic layers and a heater element embedded in the ceramic layers; and a solid electrolyte layer including a detection section covered by a pair of electrodes, the solid electrolyte layer being laminated together with the ceramic heater. Furthermore, the element body has a width at a front portion including the detection section smaller than at a rear portion, and at least both side edge faces of the front portion of the element body are covered with a porous layer.
摘要:
A prismatic ceramic heater for heating a gas sensor element includes a heating resistor embedded in ceramic, and has a substantially rectangular cross section. At least part of a longitudinally extending edge portion of the prismatic ceramic heater is located in the vicinity of the heating resistor. This part of the longitudinally extending edge portion is coated with a porous protective layer. The protective layer has a thickness not less than 20 μm and a curved surface of a curvature radius not less than 10 μm. The protective layer prevents cracking induced by contact with water.
摘要:
A gas sensor including a detection element having a front-end portion, a detection portion formed at the front-end portion of the detection element, and a protector that covers the detection portion. The protector includes a first portion having a first sidewall and a second portion having a second sidewall disposed outside the first portion. The first sidewall has an axial front end and a tapering portion. The tapering portion is formed from the axial front end of the first sidewall. The side portion has a front-end surface provided with a first gas outlet, and the second portion has a front-end surface provided with a second gas outlet. Furthermore, at least one gas inlet is formed to the sidewall of the second portion opposite the tapering portion, and plural gas inlets are formed on the sidewall of the first portion.
摘要:
An active oxygen scavenger comprising as an active ingredient a pterin derivative of the formula (I): ##STR1## wherein R.sup.1 and R.sup.2 are independently a hydrogen atom, an alkyl group of 1 to 4 carbon atoms, or an acyl group of the formula R.sup.3 --CO--, R.sup.3 is an alkyl group of 1 to 4 carbon atoms, X is a formyl group or hydroxymethyl group, A is a group of the formula (Ia): ##STR2## and n is 0 or an integer of 1 or more, with the proviso that when X is a hydroxymethyl group, n is 0, or when n is an integer of 1 or more, each of R.sup.1 and R.sup.2 is a hydrogen atoms, and X is a formyl group, or a cyclic compound thereof, or a salt thereof is disclosed.
摘要:
A method for detecting a target nucleic acid comprises the steps of reacting a sample with a probe in the presence of two or more kinds of reagents capable of being made an irreversible change capable of being detected and accumulating by an interaction through a double helix structure under a condition enabling the replication of the formation and dissociation of a hybrid composed of the target nucleic acid in the sample and the probe, accumulating the irreversible change caused by the interaction of the reagents, and then detecting the accumulated change.
摘要:
Genetic recombinant yeast expressing xylose reductase (XR), (wild-type or mutant) xylitol dehydrogenase (XDH), and xylulokinase (XK) and a method for highly efficiently producing ethanol from xylose using the yeast are provided. Pichia stipitis-derived XR and (wild-type or modified-type) XDH genes and Saccharomyces cerevisiae-derived XK gene were introduced via chromosomal integration. Thus, a genetic recombinant yeast having a high xylose fermentation rate, being capable of producing ethanol from xylose in high yields, and having high xylose fermentability in the presence of glucose, as well as a method using the recombinant yeast for highly efficiently producing ethanol from xylose or a saccharified solution from lignocellulose-based biomass are provided. Furthermore, a method for improving the xylose fermentability of the genetic recombinant yeast of the present invention via acclimatization treatment is also provided herein.
摘要:
A method for detecting a nucleic acid hybrid comprises steps of adding a nucleic acid probe into a sample solution containing a targeted nucleic acid, and detecting a double helical structure of a hybrid formed between the probe and the targeted nucleic acid, wherein the step for detecting the double helical structure comprises incorporating, into the sample solution, two or more kinds of reagents which are capable of causing a detectable change by interaction therebetween through the double helical structure and measuring the change caused by the interaction of the reagents; and at least one of the two or more kinds of reagents is joined to the probe.
摘要:
In the process of fabrication of semiconductor devices, a lead frame hoop supplied from a supply reel is set forward to successively enter into a series of fabricating steps. After having been subjected to pellet bonding, wire bonding and resin-molding, it is wound up about a take-up reel. Baking step is performed with the lead frame hoop wound on the take-up reel. The lead frame hoop unwound from the take-up reel is cut into separate individual semiconductor device units from one another and the measurement of characteristics and the classification of the thus prepared units are carried out with the positions of the units maintained as they were at the cutting step. Accordingly, the process has a smaller number of steps and therefore the production cost is reduced, and the speed of working is improved.
摘要:
Genetic recombinant yeast expressing xylose reductase (XR), (wild-type or mutant) xylitol dehydrogenase (XDH), and xylulokinase (XK) and a method for highly efficiently producing ethanol from xylose using the yeast are provided. Pichia stipitis-derived XR and (wild-type or modified-type) XDH genes and Saccharomyces cerevisiae-derived XK gene were introduced via chromosomal integration. Thus, a genetic recombinant yeast having a high xylose fermentation rate, being capable of producing ethanol from xylose in high yields, and having high xylose fermentability in the presence of glucose, as well as a method using the recombinant yeast for highly efficiently producing ethanol from xylose or a saccharified solution from lignocellulose-based biomass are provided. Furthermore, a method for improving the xylose fermentability of the genetic recombinant yeast of the present invention via acclimatization treatment is also provided herein.