摘要:
A microorganism is cultivated with a liquid-containing culture medium so as to obtain a protein-containing cellular product. The latter is then recovered from the culture medium. Thereafter, the liquid portion of the culture medium is treated so as to obtain a first fraction which contains proteins and a second fraction which is substantially free of proteins and contains an active substance or active substances. The treatment of the liquid portion of the culture medium may include ultrafiltration, filtration through a molecular sieve, precipitation or solvent extraction. The active substances present in the second fraction may include growth factors and growth inhibitors for the microorganism. Certain of these growth factors and growth inhibitors are useful in the cultivation of green plants and the second fraction may be utilized for this purpose. On the other hand, all or part of the second fraction may be recycled for use in the cultivation of the microorganism. Aside from the recovery of active substances which is achieved by separating the liquid portion of the culture medium into first and second fractions, there is achieved the result that water pollution due to discharge of the culture medium may be reduced since the biochemical oxygen demand of the culture medium is decreased by removal of the proteins therefrom, that is, by recovering the protein content of the culture medium as a separate fraction.
摘要:
An upright vessel for the liquid phase has a cylindrical baffle located in it extending upwardly from the lower region of the vessel. The baffle has a lower open end at which an impeller is located and an upper open end which is formed with a constriction. A member provided with passages through which the gaseous phase is discharged, is located in the constriction so that the passages discharge the gaseous phase at the narrowest cross-section of an annular clearance formed between the constriction and the member.
摘要:
Method of storing and transporting individual paper sheets abutting against each other to form a staple of sheets, in which a precompressed staple of sheets resting between upright support members on a support surface of a first magazine is gripped at opposite ends by clamping jaws of a gripper, which compresses the staple further to a self-supporting body, whereafter the body is lifted from between the support members of the first magazine and transported between support members of a second magazine, spaced from the first, at which the body is then relaxed by removing the clamping jaws; and an arrangement for carrying out the method.
摘要:
Processes for the production of essentially solid nutriments and fodders containing a high content of proteins by the cultivation of a yeast on a liquid culture medium consisting of whey containing at least a substantial portion of its original soluble proteins and thereafter separating from the resulting brew the solids consisting of yeast cells and the original soluble proteins or products of the original soluble proteins by means of an ultrafilter provided with one or more membranes that are essentially impervious to soluble proteins and subsequently drying the said solids.The preliminary separation of the soluble proteins from the whey by centrifugal separation or by ultrafiltration, as described in the prior art, is avoided. In such prior ultrafiltration processes, the membranes of the ultrafilter become clogged with the soluble proteins, thereby retarding and ultimately stopping the filtration. The brew that is produced in accordance with the processes of the present invention which contains yeast cells together with the original soluble proteins or products thereof can be separated in an ultrafilter at a faster rate than the soluble proteins could have been preliminarily separated from the whey and the ultrafilter membranes do not become clogged with the solids that are thus separated.
摘要:
From a vessel in which micro-organisms grow in a liquid medium containing gas bubbles, a sample is withdrawn into an exterior measuring chamber by means of suction. Gas bubbles are allowed to escape from the sample and thereafter the opacity or turbidity of the sample is measured by passing a light beam through it.
摘要:
An arrangement performs backlining or headbanding of a spine of a book block conveyed on a conveying section of a book production line through a backlining station. A feeding device feeds backlining material in a transfer direction perpendicular to a book block conveying direction. A unit includes a cross cutter to cut the backlining material into backlining sections, a transfer mechanism to transfer the backlining sections onto the book block spine, and a support table to support the backlining section being transferred onto the book block spine. A guide element is disposed above and at a distance to a book block spine in a production position, which guide element is advanced to bridge the book production line to transfer the backlining material through the book production line to allow at least one of outfitting or retrofitting of the backlining station.
摘要:
An improved method of synthesis of a 9-substituted hypoxanthine derivative comprises the steps of: (1) reacting aminocyanacetamide with triethyl orthoformate to form an imidoester derivative of aminocyanacetamide; (2) forming a compound having a reactive amino group on a hydrocarbyl moiety, the hydrocarbyl moiety being linked through an amide group to a physiologically active moiety or an esterified derivative of a physiologically active moiety including therein an esterified benzoyl group; (3) reacting the imidoester with the compound having the reactive amino group on the hydrocarbyl moiety to form a derivative of 5-aminoimidazole-4-carboxamide substituted at the 1-position with a hydrocarbyl moiety linked through an amide group to a physiologically active moiety including therein an optionally esterified benzoyl group; (4) forming the six-membered heterocyclic ring of the purine moiety of the hypoxanthine by reacting the derivative of 5-aminoimidazole-4-carboxamide formed in step (3) with triethyl orthoformate to form a 9-substituted hypoxanthine compound substituted at the 9-position with a hydrocarbyl moiety linked through an amide group to a physiologically active moiety including therein an optionally esterified benzoyl group; and (5) hydrolyzing the ester of the optionally esterified benzoyl group if present.
摘要:
In an apparatus for the extra-corporal treatment of blood wherein blood is supplied from a body to a vacuum bottle via a conduit and an insertion spike, the insertion spike is in communication, by way of a gas hose, with a pressure compensation bag from which a predetermined amount of gas can be supplied to the insertion spike for foaming the blood in the vacuum bottle, whereby no excess pressure can be generated in the vacuum bottle. The blood conduit further includes a quartz glass portion to permit UV irradiation of the blood while passing therethrough.
摘要:
In an apparatus for the irradiation of body fluids by ultraviolet light in a containment for receiving the body fluids which is disposed in the radiation range of an ultraviolet light source, the containment includes baffle means arranged so as to subject the body fluids circulated through the containment to turbulence whereby the body fluid in the containment is uniformly exposed to the UV radiation.
摘要:
An invertible tubular substrate of resin-permeated fibrous material is surrounded by an impermeable tubular film which, in turn, is surrounded by an impermeable tubular calibrating element. One end of the substrate is inserted into one end of a pipe which is to be lined from the inside, and the assembly of substrate, film and calibrating element is thereupon inverted into the pipe wherein the substrate is immediately adjacent the internal surface of the pipe and surrounds the film. The calibrating element is separable from the film and can be withdrawn from the interior of the inverted film by a flexible cord. The resin in the substrate sets upon inversion and maintains the inverted substrate in contact with the internal surface of the pipe.