摘要:
A nut for turning onto a threaded stud and having a smooth bore extending from an inwardly-tapering conical lead-in area, the nut being characterized in that in the lead-in area a stripping zone is formed by a plurality of parallel tubular cavities of smaller diameter than the bore of the nut, in that the cavities are spaced apart and arranged symmetrically about the axis of the bore of the nut, in that the axis of each tubular cavity is spaced from the axis of the bore of the nut by a distance smaller than the sum of the radii of the tubular cavity and of the bore and greater than the radius of the bore, in that the intersections of the walls of each tubular cavity with the wall of the bore of the nut form cutting edges, and in that the respectively adjacent tubular cavities are linked to one another via cavities provided therebetween so that a coating stripped from the threaded stud as the nut is turned onto the stud can be accommodated in this cavity.Preferably, the nut has three tubular cavities which are linked together by three linking cavities.
摘要:
A peroxide-testing method using a reagent based on Ti(IV) compounds which contains, in a lower aliphatic alcohol having 1-5 C atoms, a compound TiX.sub.4 in which X is Cl or OR with R being an alkyl group having 1-5 C atoms, and where appropriate, up to 35% by weight of an acid which has a pK.sub.a value not exceeding 5. The method is useful for the determination of peroxides in both aqueous and organic solutions since the reagent is miscible with the sample solution to produce a homogeneous phase.
摘要:
A spindle press comprises a housing with a circular cylindrical upper part and a lower part. A press spindle, which is drivable in a rotating manner via a drive pipe by a drive arrangement, is supported in an upper bearing and a lower bearing of the housing so as to be rotatable. A spindle body of the press spindle carries worm wings on the outside and compressor blades farther above, which all extend in the vicinity of a screen casing of the upper part. The screen casing is enclosed at a distance by a spray casing and provided with holes for pressed out fluid only from the compressor blades down. The spindle body also comprises perforations for the pressed out fluid only from the compressor blades down. Above the compressor blades a helically constructed front wall is welded in between an annular wall and the screen casing which is unperforated at that point. On the lower side of the front wall, wet pulp arrives tangentially through a filling opponent of the upper part.
摘要:
A device for separating plasma or serum from whole blood and analyzing the same, wherein the device includes a layer of glass fibers with an average diameter of from 0.2 to 5 microns and having a density of from 0.1 to 0.5 g./cm.sup.3 and an adsorption volume at least twice that of the plasma or serum to be separated and, preferably, more than 3.3 times the volume.
摘要翻译:一种用于从全血中分离血浆或血清并分析其的装置,其中所述装置包括平均直径为0.2至5微米并且具有0.1至0.5g / cm 3的密度的玻璃纤维层和吸附 体积至少是要分离的血浆或血清的两倍,并且优选地是体积的3.3倍以上。
摘要:
The present invention provides a method of improving reagent elution from a reagent strip comprising a handle on one end which is affixed an absorbent carrier impregnated with a reagent. The absorbent carrier is pressed against the handle by a thin mesh which is stuck or sealed on to the handle on opposite sides of the carrier.Another mesh is between the carrier and the handle. When the carrier is immersed in a liquid, the meshes improve the elution of the reagent into the liquid.
摘要:
Esters and agents including the esters, useful as substrates for esterolytic and/or proteolytic enzymes, said esters being compounds of the general formula: ##STR1## in which R".sub.1, R".sub.2, R".sub.3 and R".sub.4, which may be the same or different, are hydrogen atoms or lower alkyl, lower alkoxy, alkylamino or dialkylamino radicals or in which two adjacent substituents can also represent a fused benzene ring, A is a residue of an amino acid or of a peptide and B is a nitrogen protective group conventional in peptide chemistry or derived therefrom; and the method of preparation and use.
摘要:
Diagnostic agent for the detection of leukocytes in body fluids, comprising an absorbent carrier which is impregnated with a chromogen and a buffer substance, wherein the chromogen is a sulfonphthalein ester of the formula ##STR1## wherein R.sub.1 is a carboxylic acid residue optionally substituted by halogen or lower alkoxy; or is an amino acid or peptide residue having a nitrogen protective group;R.sub.2 is a halogen atom or a lower alkyl radical; andR.sub.3 and R.sub.4 are individually selected from hydrogen and halogen.Certain of the chromogen are provided as novel compounds.
摘要:
Diagnostic agent for the detection of component materials, in liquids and method of production. The diagnostic agent includes a water resistant film composed of a film-former and contains a film opener in the form of fine, insoluble inorganic or organic particles.
摘要:
Bis-(2,4-dinitrophenyl)-methylpyridinium compounds useful as a pH indicator or for the detection of ammonia having the formula: ##STR1## wherein one of R.sub.1 and R.sub.2 is a bis-(2,4-dinitrophenyl)-methyl radical and the other is a lower alkyl radical;R.sub.2 can also be hydrogen atom or trifluoromethyl;R.sub.3 and R.sub.4 are hydrogen or, together with the carbon atoms to which they are attached, represent a benzene ring; andX.sup..crclbar. is an appropriate acid anionor said compounds are betaines.
摘要:
Rapid diagnostic compositions and methods for the determination of uric acid in body fluids by inversion colorimetry, wherein the indicator used is a radical of the general formula: ##STR1## in which R is a lower alkyl radical and Me is an alkali metal atom or an ammonium group.