摘要:
A system and a process are disclosed, that are automated and integrated with numerically controlled systems, for measuring, compensating and testing numerically controlled machine tool heads (1) and/or tables. The system comprises: at least one support base (11) equipped with a plurality of distance sensors (14); at least one device (16) of the gage tool type composed of an elongated cylinder (17) that is equipped at one of its ends with connection means (18) for the heads (1) and is equipped at another opposite end with a ball (20), wherein the ball (20) is placed next to the sensors (14) so that they are able, always and in any position, to measure the distance that separates them from the ball (20) and determine thereby the position in the Cartesian space.
摘要:
The invention relates to biocompatible membranes constructed of materials of natural, synthetic or semisynthetic origin, and having a thickness of between 10 and 500.mu., characterized by containing an ordered series of holes of a constant size between 10 and 1000.mu., separated from each other by a constant distance of between 50 and 1000.mu., and obtained by perforation by mechanical, thermal laser or ultraviolet radiation means, they being suitable for use as a support for the in vitro growth of epithelial cells, the invention also relating to the artificial skin obtained thereby and its use in grafts.
摘要:
The process of the invention relates to a process for the preparation of a ganglioside mixture, free from contaminants associated with non-conventional, life-threatening viruses, without altering the biological and pharmacological characteristics of the mixture on the central and peripheral nervous systems.
摘要:
Two pharmaceutically useful fractions of hyaluronic acid are obtained comprising a first fraction with a molecular weight between 50,000 and 100,000 which is useful for wound healing, and a second fraction having a molecular weight between 500,000 and 730,000 which is useful for intraocular and intraarticular injections.In addition, pharmaceutical preparations for topical administration are provided containing a pharmacologically active substance together with hyaluronic acid or a molecular weight fraction thereof. The hyaluronic acid may be in the form of the free acid or may be a salt with an alkali or alkaline earth metal, magnesium, aluminum or ammonium, or in the form of a salt with one or more pharmacologically active substances.
摘要:
N-acyl-N,N'-di-lysogangliosides, N'-acyl-N,N'-di-lysogangliosides and N,N'-diacyl-N,N'-di-lysogangliosides, in which the acyl groups are derived from an organic acid of the aliphatic, aromatic, araliphatic, alicyclic or heterocyclic series and in which at least one of the two acyl groups is not aliphatic, and their preparation are disclosed. Also disclosed is the preparation of the esters, inner esters, amides and hydroxy peracylates of these compounds and salts thereof. These compounds are useful in the treatment of pathologies of the central and peripheral nervous systems.
摘要:
A feeler device comprises a support structure in which a movable assembly is movably mounted along three axes, the movable assembly carrying at one end a feeler member. The movable assembly is suspended in the support structure by means of laminar elements which have respective slots of spiral, preferably logarithmic, form.
摘要:
Novel ganglioside derivatives comprised of a basic natural or semisynthetic ganglioside, in which the carboxyl group in the sialic part of the natural or semisynthetic ganglioside is converted into a carboxylamide with an aliphatic amino acid with a carboxylic or sulfonic acid function, and salts thereof are prepared. The semisynthetic ganglioside components can be chosen from the group consisting of N-acyl-N-lyso-gangliosides, N'-acyl-N'-lyso-gangliosides and N,N'-diacyl-N,N'-di-lyso-gangliosides, wherein "acyl" designates a moiety of an optionally substituted aliphatic acid. The ganglioside derivatives can be used in pharmaceutical preparations to be used in nervous system pathologies.
摘要:
Total and partial esters of alginic acid which possess important bioplastic and pharmaceutical qualities and are useful in various fields including medical, surgical, cosmetics and foods.
摘要:
Acidic polysaccharide esters containing carboxylic groups are useful for protecting against and curing ulcers of the gastro-enteric system. These esters include choline esters with acidic polysaccharide selected from the group consisting of hyaluronic acid, alginic acid, gellan, oxidized cellulose, oxidized chitin, carboxy-hydrocarbyl-cellulose, carboxy-hydrocarbyl-starch and carboxy-hydrocarbyl-chitin, wherein the term hydrocarbyl means the residue of a hydrocarbon selected from the group consisting of by alkyl, aralkyl and cycloalkyl.
摘要:
The use of monosialoganglioside GM.sub.1, of its pharmacologically acceptable salts and of its internal ester derivative for the preparation of pharmaceutical compositions for preventing the development in man of tolerance to the analgesic effect of morphine, of chemically correlated opiates, and of methadone and its derivatives is described.