摘要:
Described is a process for the production of depolymerized natural rubber, which makes it possible to obtain, at high reaction efficiency, of depolymerized natural rubber in the liquid form and having a narrow molecular weight distribution; and also a process for the production of depolymerized natural rubber which is free from odor or coloring peculiar to natural rubber and is also free from the danger of immediate allergy derived from protein.The process according to the present invention comprises adding a carbonyl compound to a natural rubber latex, and then subjecting the resulting natural rubber to air oxidation in the presence of a radical forming agent or adding a carbonyl compound to the latex of deproteinized natural rubber and then subjecting the deproteinized natural rubber to air oxidation optionally in the presence of a radical forming agent.
摘要:
A depolymerized natural rubber having a number-average molecular weight of from 2,000 to 50,000 obtained by the depolymerization of a deproteinized natural rubber. A process for the preparation of a depolymerized natural rubber comprises dissolving a deproteinized natural rubber into an organic solvent so as to give a concentration of from 1 to 30% by weight and then carrying out air oxidation of the resulting solution in the presence of a metallic catalyst. The depolymerized natural rubber can provide the same physical properties as ordinary vulcanized rubbers, exhibits no odor or color characteristic to natural rubbers and causes no immediate allergy induced by protein.
摘要:
A process is disclosed, by which protein can be removed easily and efficiently from natural rubber latex so that deproteinized natural rubber latex can be produced with high productivity and low cost. Particularly, a process for the production of deproteinized natural rubber latex is disclosed, which comprises treating natural rubber latex with a proteolytic enzyme and a surfactant to decompose protein in natural rubber latex, washing the treated natural rubber latex in the presence of a salt. According to the process, deproteinized natural rubber latex useful as a counter-allergy material having stable qualities can be produced easily with high productivity and low cost.
摘要:
A process is disclosed, by which protein can be removed easily and efficiently from natural rubber latex so that deproteinized natural rubber latex can be produced with high productivity and low cost. Particularly, a process for the production of deproteinized natural rubber latex is disclosed, which comprises treating natural rubber latex with a proteolytic enzyme and a surfactant to decompose protein in natural rubber latex, washing the treated natural rubber latex in the presence of a salt. According to the process, deproteinized natural rubber latex useful as a counter-allergy material having stable qualities can be produced easily with high productivity and low cost.
摘要:
A compressive hemostatic belt which is easily operable and thrown away after use, incorporates a strip (1) in the form of a nonstretch or low-stretch textile fabric, and a bag (5) expansible by being filled with fluid that is attached to the strip at a predetermined position by an attaching device. A pump (8) and a pressure gauge (9) are connected to the bag (5) attached at the predetermined position on the strip (1), so that the bag is expanded by operating the pump so as to fill the bag (5) with a suitable fluid while watching the pressure gauge (9). The bag thus presses down on an area (A) where bleeding is to be stopped.
摘要:
The invention presents a compressive hemostatic belt which is easy to handle and is disposable. A balloon 5 inflatable by filling with fluid is mounted on a specific position of a strip 1 made of non-elastic or low-elastic fiber cloth or the like through mounting means, and a pump 8 and a pressure gauge 9 are connected to the balloon 5 through a check valve 6. The balloon 5 is filled with a fluid by manipulating the pump 8 while observing the pressure gauge 9 to inflate the balloon 5, so that only the area where bleeding is to be stopped is put under pressure. Since the balloon 5 is inflated only on the specified area, a piece of hard material 4 may be placed between the balloon 5 and the strip 1. A non-elastic reinforcing member 11 inserted on the opposite side of the balloon 5 can be varied, or the confronting portion of the strip 1 against the balloon 5 can be formed of a non-elastic reinforcing member stronger than the materials of other portions of the strip.
摘要:
An imaging element is formed on the first main surface of a semiconductor substrate. An external terminal is formed on the second main surface of the semiconductor substrate. A through-hole electrode is formed in a through hole formed in the semiconductor substrate. A first electrode pad is formed on the through-hole electrode in the first main surface. An interlayer insulating film is formed on the first electrode pad and on the first main surface. A second electrode pad is formed on the interlayer insulating film. A passivation film is formed on the second electrode pad and the interlayer insulating film, and has an opening which exposes a portion of the second electrode pad. A contact plug is formed between the first and second electrode pads in a region which does not overlap the opening when viewed in a direction perpendicular to the surface of the semiconductor substrate.
摘要:
A method of manufacturing a semiconductor device includes forming a trench for isolation on a surface of a substrate including a semiconductor substrate, filling the trench with a solution containing a perhydrosilazane polymer by applying the solution on the substrate, converting the solution into a film containing the perhydrosilazane polymer by heating the solution, and converting the film into a silicon dioxide film including heating the film at a first temperature in an atmosphere containing vapor, and heating the film heated at the first temperature at a second temperature lower than the first temperature in an atmosphere containing vapor or in pure water.
摘要:
There is disclosed a method of manufacturing a semiconductor device, wherein an Si3N4 film is formed as a mask member on the surface of a silicon substrate, then etched to form an STI trench. A solution of perhydrogenated silazane polymer is coated on the surface of the silicon substrate having an STI trench formed thereon to deposit a coated film (PSZ film) thereon. The PSZ film deposited on the mask member is removed, leaving part of the PSZ film inside the trench, wherein the thickness of the PSZ film is controlled to make the height thereof from the bottom of the STI trench become 600 nm or less. Thereafter, the PSZ film is heat-treated in a water vapor-containing atmosphere to convert the PSZ film into a silicon oxide film through a chemical reaction of the PSZ film. Subsequently, the silicon oxide film is heat-treated to densify the silicon oxide film.
摘要翻译:公开了一种制造半导体器件的方法,其中在硅衬底的表面上形成Si 3 N 4 N 4膜作为掩模构件,然后蚀刻形成 一个STI沟槽。 将过氢化硅氮烷聚合物的溶液涂布在其上形成有STI沟槽的硅衬底的表面上,以在其上沉积涂膜(PSZ膜)。 去除沉积在掩模构件上的PSZ膜,使PSZ膜的一部分留在沟槽内,其中控制PSZ膜的厚度使其从STI沟槽底部的高度变为600nm以下。 然后,在含水蒸汽的气氛中对PSZ膜进行热处理,通过PSZ膜的化学反应将PSZ膜转换为氧化硅膜。 随后,对氧化硅膜进行热处理以使氧化硅膜致密化。
摘要:
This invention relates to a compressive hemostatic belt wherein a cup-shaped rigid case is attached by an attaching device to a predetermined position on a band made of non-stretchable or low-stretchable fiber, nonwoven fabric or film, and a balloon adapted to be inflated by being filled with fluid is received in the rigid case. Preferably, at least the portion of the band which corresponds to the leg when the band is wrapped around the body is shaped in curve form. Buckles may be attached to the opposite ends of the band and a buckle attaching plate may be attached to the rigid case. One end of the band may be provided with projections so that when the band is wrapped around the body, the other end of the band is thrusted on the projections to fix the band in position. If the band is made of adhesive material, more reliable fixing can be achieved. A check valve adapted to prevent fluid from flowing back from the balloon may be removably connected to the balloon to provide for reuse of the check valve.