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Cellular and Molecular Life Sciences -  相似文献   

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Summary The properties and advantages of barium titanate transducers for pressure registrations have been described. If the rate of pressure change is less than 10–3 s, a barium titanate transducer with a cathode ray oscilloscope as commonly used is sufficient. Pressure changes with a duration of up to 1 s can be recorded by means of a barium titanate transducer, cathode follower with open grid, and D.C. oscilloscope. This arrangement can be adapted to the registration of processes of even longer duration by a shunt capacity. The sensativity of the transducer used was in the order of 2 V per 1 atm.  相似文献   

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Summary The methylmethacrylate method, as developed byv. Hirsch andBoellaard has also proved most successful for the preparation of histological sections of insects with a hard chitinous exoskeleton. This report deals with technical variations of the above method, developed for our special needs.  相似文献   

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Summary The author derives from the differential equation for the annuity and from the difference equation for the value of the policy several relations, which allow to represent approximately the value of composed forms of insurances by the value of simple forms of insurances; likewise, it is easy to render formally the influence of a variation of the rate of interest.  相似文献   

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Summary There is described an apparatus to produce optically a set of error curves of variable height and breadth. Electrophoresis-diagrams obtained with the arrangements ofLongsworth andPhilpot-Svensson may be evaluated by comparison of the measured curve with the corresponding curve of the set.  相似文献   

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Summary In case ofAbsidia coerulea, Mucor mucedo, Rhizopus nodosus, Rhizopus oryzae andRhizopus suinus (auxoautotroph), Hypoxanthine effects, as well as in case ofPhycomyces Blakesleeanus (auxo-heterotroph), by acceleration of the germinating of the spores a temporary increased growth in contrary to controls without this additional growth factor.  相似文献   

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Summary A particularly efficient removal of urea and similar substances by dialysis in an artificial kidney is obtained if both blood and dialyzing liquid are allowed to flow in countercurrent through channels a few hundredths of a mm thick and separated from each other by a membrane about 1/100 of a mm thick. In order practically to realize the flow required, about two thousand of these narrow channels, each of a length of about 2 cm, are arranged parallel to form a capillary net system.Four elements, each consisting of 2000 narrow channels, are needed in order to obtain a clearance of 80 ml/min. The quantity of blood needed to fill the elements is about 5 cm3 for each element.

Vorgetragen am Kongress der «3o riunioni medico chirurgiche internazionali», Turin 1957.  相似文献   

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Summary Librium Roche (7-Chlor-2-methylamino-5-phenyl-3 H-1,4-benzodiazepin-4-oxyd-hydrochlorid) increases significantly the percentage of survival of lethally X-irradiated male mice in the dose range between 7.5 and 12.5 mg/kg.  相似文献   

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Zunächst wird mit der Entstehung sowie dem Ausbau der beiden Reichsanstalten bis zum Jahre 1922 historisch eingeleitet, wobei über die Reichsanstalt für Mass und Gewicht als die meist unbekanntere etwas ausführlicher berichtet wird. Die Begründungen für oder gegen eine Verschmelzung werden danach aus der Sicht der beiden Reichsanstalten, der Eichbehörden der Länder des Deutschen Reiches, der Industrie, verschiedener Ausschüsse des Deutschen Reichstages und schliesslich der zuständigen Ministerien der Deutschen Reichsregierung angeführt. Mit einem kurzen Blick auf die inflationsbedingten Probleme des deutschen Alltags von Ende 1923 wird der Aufsatz durch eine Beurteilung des vor 53 Jahren geschehenen Zusammenschlusses aus dem Geschehen eben dieser 53 Jahre abgeschlossen.  相似文献   

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Summary Measurements of the radiogenic87Sr/87Rb ratio of the chondritic meteorite Forest City are discussed in the light of a new determination of the half-life of87Rb. Earlier conclusions are confirmed.  相似文献   

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