Abstract:
A pipette tip having a first end arranged to be fitted to a pipette body (3) of a pipette (1) and having a second end with an opening (15) arranged to be inserted in a sample which is at least in part intended to be drawn up by the pipette, wherein the opening (15) has a sharp profile such that it can be used to cut through a cover (119) covering an enclosure containing the sample.
Abstract:
A temperature control device for controlling a temperature of a substance to obtain a first temperature and to change to a second temperature has first and second heating blocks and a heating device. The heating device heats the first and second heating blocks to the first and second temperatures, respectively. The temperature control device has a first material opposing the first heating block to define a first space between them arranged to receive the substance and to define a first temperature zone having substantially the first temperature. The temperature control device has a second material opposing the second heating block such as to define a second space between them arranged to receive the substance and define a second temperature zone having substantially the second temperature, the first and second spaces being arranged such that the substance can be moved from the first temperature zone to the second temperature zone.
Abstract:
A pipette tip having a first end arranged to be fitted to a pipette body (3) of a pipette (1) and having a second end with an opening (15) arranged to be inserted in a sample which is at least in part intended to be drawn up by the pipette, wherein the opening (15) has a sharp profile such that it can be used to cut through a cover (119) covering an enclosure containing the sample.
Abstract:
A PROCESS FOR PURIFYING BROMOCHLOROTRIFLUOROETHANE IS DISCLOSED, WHEREIN 1,2-DICHLOROHEXAFLUOROCYCLOBUTANE IMPURITY IS REMOVED FROM THE BROMOCHLOROTRIFLUOROETHANE BY FORMING A MAXIMUM BOILING AZEOTROPE OF THE BROMOCHLOROTRIFLUOROETHANE WITH ACETONE OR TETRAHYDROFURAN AND THEREAFTER DISTILLING, UNDER REFLUXING CONDITIONS, THE RESULTING AZEOTROPIC COMPOSITION UNTIL THE RESIDUE CONTAINS LESS THAN 0.01% OF THE DIMER IMPURITY. PROCESS OF THE PRESENT INVENTION ALLOWS THE PRODUCTION OF HALOTHANE OF IMPROVED PURITY, SUITABLE FOR USE AS AN ANESTHETIC.
Abstract:
Provided are methods of treating certain skin conditions in a human in which the skin of the human in need of such treatment is contacted with an effective amount of a particular composition.
ARE DISCLOSED, WHEREIN R1, R2 and R3 are fluorinated or chlorofluorinated alkyl or ether or polyether groups. These compounds are thermally and oxidatively highly stable fluids, useful as hydraulic fluids in, e.g., aircraft.
Abstract:
A SERIES OF HIGH MOLECULAR WEIGHT FLUORINATED ALKYL TRISUBTITUTED TRIAZINES IS DISLCOSED. THEY ARE FLUIDS HAVING OUTSTANDING FIRE RESISTANCE, THERMAL STABILITY, LUBRICITY, AND WHICH EXHIBIT A WIDE FLUID RANGE, WHICH MAY BE VARIED DEPENDENT UPON THE NATURE OF CERTAIN DISCLOSED POLYFLUOROALKYL SUBSTITUENTS ON THE 2,4 AND POSITION OF THE S-TRIAZINE RING.
ARE PRODUCED BY REACTING METHYL NITRIETE AND PERFLUOROGLUTARIC ANHYDRIDE OR PERFLUOROSUCCINIC ANHYDRIDE AND THEN DECARBOXYLANTING THE RESULATNT PRODUCT. THE COMPOUNDS, WHICH CAN BE HYDROLYZED TO PRODUCE THE CORRESPONDING NITROSO-SUBSTITUTED FLUORCARBON ACIDS, ARE USED AS COMONOMERS IN NITRROSO RUBBERS.