摘要:
A machine for the mechanical restoration of papers and documents comprises a housing having a chamber, a screen over the upper end of the chamber for receiving the documents to be restored, a suction pump applying a vacuum to the lower face of the screen, a well overlying the screen for containing a mixture of water and the paper-restoring composition, and a hold-down member overlying the screen and movable through the well from an operative position pressing against the upper face of the document to hold it firmly against the upper face of the screen. The hold-down member is pivotable to an inoperative position, disengaged from the document and includes water-directing channels for directing the liquid adhering thereto to drain to its sides and then to the sides of the well rather than to drip downwardly onto the document in the middle of the well.
摘要:
8-PYRIDLY PURINES CAN BE SYNTHESIZED BY CONDENSATION OF 4,5-DIAMINOPYRIMIDINES WITH AMIDINOPYRIDINES. PROTONATION OF THE PYRIDINE NITROGEN CAUSES A MARKED BATHOCHROMIC SHIFT OF $MAX IN THE 2- AND 4-PYRIDYL DERIVATIVES, BUT NOT IN THE 3-PYRIDYL ISOMERS. A SIMILAR EFFECT IS PRODUCED BY QUATERNISATION OF THE 4-, BUT NOT OF THE 3-PRIDYL SUBSTITUENT. THE 8-(N-METHYLPYRIDINIUM) GROUP ALSO FACILITATES GREATLY ANION FORMATION IN THE PRUINE RING. THE NEW COMPOUNDS SHOWED A VARIETY OF BIOLOGICAL ACTIVITIES, SUCH AS PROLONGED HYPOTENSION WHEN INJECTED INTO CATS WHICH WERE ANESTHETIZED WITH NEMBUTAL.
摘要:
The present invention relates to a collector adapted to concentrate solar energy onto a photoelectric cell comprising in combination at least one glass plate doped with a substance resulting in fluorescence when said plate is irradiated by sunlight, a photoelectric cell being attached to a lateral side of the plate, the other lateral edges of the plate being provided with a reflective coating, said cell having a high efficiency in the range of wavelength of the fluorescent radiation.A plurality of such glass plates can be stacked one upon the other, each doped to absorb at a predetermined region of the spectrum and to fluoresce in a region where a certain photocell is sensitive.A fluorescent dye in a suitable carrier can be applied as a surface layer on such glass plates, and this improves the overall efficiency of the collector.
摘要:
Improved in vitro test method and apparatus for assessing thyroid function comprising mixing a microquantity of blood serum with a predetermined amount of a radioactive isotope tagged thyroid hormone solution in the upper portion of a tubular body having a fixed geometry, said body containing a column of predetermined quantity of cross linked dextran gel as a secondary binding site in an aqueous fluid held between porous discs in the lower portion of the body and having valve means at the lower end thereof, allowing said mixture to enter said column, determining the total added thyroid hormone by a radioactivity measurement, washing or eluting said column with a suitable fluid, determining the amount of hormone retained in said column by a radioactivity measurement and making a calculation based on the ratio of the amount of retained hormone to the total amount of added hormone for the particular thyroid hormone being assessed.
摘要:
A STARTER FOR THE KIND OF FLUORESCENT LAMP WHICH IS USED IN A CIRCUIT ENERGIZED FROM AN AC SOURCE AND WHICH CAUSES A HIGH AC VOLTAGE ACROSS THE LAMP DURING STARTING AND A LOWER VOLTAGE ACROSS THE LAMP DURING LAMP OPERATION, THE STARTER BEING A SEMICONDUCTOR SWITCH WHICH DURING ALTERNATE HALF-CYCLES OF THE SUPPLY CAUSES HEATING OF THE FILAMENTS AND DURING THE OTHER HALF-CYCLES CAUSES THE FULL SUPPLY VOLTAGE TO BE APPLIED TO THE LAMP, THE HEATING OF THE LAMP FILAMENTS CEASING WHEN THE LAMP IS ENERGIZED AND THE LAMP VOLTAGE THEREBY FALLS.
摘要:
AMIDES, UREIDES, THIOUREIDES AND GUANIDINE DERIVATIVES OF THE FOLLOWING GENERAL FORMULA, AND TO PROCESSES FOR THE PREPARATION OF THESE COMPOUNDS.
(R1-SI(-R2)(-R3)-(CH2)I-),(R4-CO-(CH2)N-)BENZENE
WHEREIN THE BENZENE RING IS SUBSTITUTED IN THE ORTHO, META OR PARA POSITION BY RADICAL CONTAINING A TRI-SUBSTITUTED SILYL GROUP (R1R2R3SI), R1,R2, AND R3 ARE ALKYL OR ARYL GROUPS, SAME OR DIFFERENT HAVING UP TO 10 CARBON ATOMS, N IS ZERO OR A WHOLE NUMBER FROM 1 UP TO 10, R4 IS A RESIDUE OF AMMONIA, HYDROXYLAMINE, HYDRAZINE OR N-ALKYL OR ARYL SUBSTITUTED HYDRAZINE, OR A PRIMARY OR A SECONDARY AMINE WHETHER SUBSTITUTED OR UNSUBSTITUTED, ALIPHATIC AROMATIC OR HETEROCYCLIC, OR THE RESIDUE OR UREA, THIOUREA OR GUANIDINE, OR THEIR SUBSTITUTED DERIVATIVES, ALL SAID RESIDUES BEING CONNECTED THROUGH NITROGEN TO THE C=O GROUP; I IS ZERO OR ONE. THESE MATERIALS SERVE AS CENTRAL NERVOUS SYSTEM DEPRESSANTS.