Abstract: Ketomethionine ketals and hemiketals and derivatives thereof are useful as feed additives, in particular for the nutrition of ruminants.

Abstract: A mobile collecting device (22) for the high-pressure water jet (26) of a water-jet tool (18), especially for working in confined places with difficult access in turbines or the like, in which a more flexible and safer operation is achieved by a closed collecting chamber (24), which extends over a large area and includes an outlet (30), and in which a rigid first collecting bed (34) formed of a first high-pressure-resistant material is arranged.

Abstract: A chemical compound of the general formula I or II is useful as feed additive: wherein X=O or NR, and R=H, C1-C6-alkyl (optionally branched), C3-C6-cycloalkyl, aryl, or aralkyl, and wherein R1, R2, are identical or different and in each case H, C1-C6-alkyl (optionally branched), C3-C6-cycloalkyl, allyl, aryl, or aralkyl; or R1 and R2 together are an C2- to C6-alkylene group (optionally C1-C6-alkyl substituted).

Abstract: A method for calibrating a measuring device monitoring at least one measured variable of a measured medium by means of at least a first sensor, wherein the signal of the first sensor is mapped to a measured value on the basis of a mapping specification, and wherein the method includes the following steps: a current measured value of the measuring device is recorded as current calibration measured value; a laboratory reference sample of the measured medium with the properties of the calibrated measured value at the point in time of the recording is supplied to a laboratory reference measuring device; the actual value of the measured variable is ascertained with the laboratory reference measuring device on the basis of the laboratory reference sample and made available and recorded as current laboratory reference measured value; and, on the basis of the current calibration measured value, as well as the current laboratory reference measured value, the mapping specification is updated, characterized in that at l

Abstract: A method for preparing ?-keto acids, especially ?-ketomethionine, and/or derivatives thereof, whereby an aldehyde is reacted with thiols to give a corresponding dithioacetal, the dithioacetal formed, is reacted with an electrophile in the presence of a strong base, and the resulting ?,?-(dithio)carboxylic acid is solvolyzed with acid-catalysis to release thiol and give the ?-keto acid or a derivative thereof. Umpolung of aliphatic or aromatic aldehydes is effected by reaction with thiols.

Abstract: Ketomethionine ketals and hemiketals and derivatives thereof are useful as feed additives, in particular for the nutrition of ruminants.