摘要:
An animal feed supplement and processes for its production which provide an inexpensive, not excessively hygroscopic or sticky supplement amino acid whose content should be standardizable. The animal feed supplement is based on a fermentation broth and contains the predominant proportion of its contents, optionally with the exclusion of part of the biomass. The biomass is preferably present in an amount of at most 10% by weight in the dry state. Proteins are preferably present in a maximum amount of 10% by weight. For the production, the sugar content is adjusted to a maximum of 4 g/l during fermentation, at least towards the end thereof, and at least part of the biomass is optionally removed during the working up.
摘要:
An animal feed additive comprising stable pellets is produced by pelletizing from a fermentation broth containing an animal feed additive with at least 33% by weight of the fermentation products present. The pellets can be produced particularly effectively by pelletizing providing they are built up from at least 30% by weight of fine particles of which at least 70% by weight are smaller than 100 .mu.m in size. The biomass may be completely present, partly present or not present at all in the pellets.
摘要:
A process is disclosed for the fermentative preparation of amino acids, in which an L-lysine producing bacterial strain of the species Corynebacterium glutamicum is cultivated in a nutrient medium and the amino acids can be isolated from the culture medium at the end of fermentation. After the vigorous growth phase, the bacterial culture has at its disposal a smaller quantity of assimilable carbon source than it could metabolize on the basis of the structure of the strain and the quanitity of other necessary supplements provided in the nutrient medium.
摘要:
A process is disclosed for the fermentative preparation of amino acids, in which a strain of the genus Brevibacterium or Corynebacterium producing one or more amino acids is cultivated in a nutrient medium and the amino acids are isolated from the culture fluid at the end of fermentation. After the vigorous growth phase, the bacterial culture has at its disposal a smaller quantity of assimilable carbon source than it could metabolize on the basis of the structure of the strain and the quantity of other necessary supplements provided in the nutrient medium.
摘要:
A method of manufacturing a self-supporting measuring probe suitable for application in a highly corrosive environment such as for example in a muffler or suction channel of a motor vehicle, is disclosed. The probe is provided with a protective foil which is applicable on a rigid substrate carrying the measuring layers, by means of a heat sealing process in which heat and pressure are simultaneously applied on the foil. In a preferred embodiment, the edges of the foil are fused to the substrate by a laser beam.
摘要:
For the catalytic reaction of 2-methylpyrazine with ammonia and oxygen to form 2-cyanopyrazine there are used compounds of the elements antimony, vanadium, and oxygen and at least one of the elements iron, copper, titanium, cobalt, manganese, and nickel, whereby the atomic ratio of antimony to vanadium is greater than 1 and which contain besides these compounds a lattice layer silicate and a highly dispersed silica. These catalysts are very selective and result in high yields and high space-time-yields.
摘要:
A carrier strip of polyimide resin sheet material carries on one face an etched pattern of metallization comprising temperature-independent resistors formed of an underlying metallization layer of tantalum base, temperature-dependent resistors in which the effect of the upper layer of metallization, of a nickel base, is predominant, and conductive paths provided by broader strips of the nickel base material. A cover layer of the same heat-resistant resin sheet material is sealed and bonded to the carrier strip wherever a metallization layer does not intervene, taking care to leave open certain contact areas for the attachment of connecting leads. A holder structure holds the strips at each end and provides clear space for attaching connecting leads as well. The holder structure is designed to allow the flow of medium to pass in good thermo contact with the portion of the device enclosing the resistance elements.
摘要:
Pyridines substituted in the 2- and 3-positions by aromatic or heteroaromatic groups are prepared by reacting an aromatic or heteroaromatic substituted ketone which has at least one reactive methylene group adjacent to the keto group with an aliphatic oxo compound having a carbon to carbon ethylenic double bond on the carbon atom adjacent to the oxo group and ammonia in the presence of a dehydrating and dehydrogenating catalyst at a temperature of about 250.degree. to 550.degree. C.
摘要:
The invention provides a feedstuff additive based on a fermentation broth obtained by the fermentation of D-pantothenic acid producing microorganisms. The broth contains D-pantothenic acid, one or more salts of D-pantothenic acid, or mixtures thereof. Conversion of the broth to a solid, free-flowing form is achieved by drying or granulation
摘要:
A magnetostrictive transducer wherein a magnetostrictive layer is applied to a flexible element, for example, a flexible beam. The flexible element is deflected by an external magnetic field. The thin magnetostrictive layer consists of Tb.sub.(1-x) Dy.sub.(x) Fe.sub.2.