THE POLARIZATION CAPACITY AND RESISTANCE OF VALONIA: I. ALTERNATING CURRENT MEASUREMENTS
نویسندگان
چکیده
منابع مشابه
The Polarization Capacity and Resistance of Valonia
Alternating current measurements of the effective capacity and resistance of Valonia cells were undertaken to determine whether a static or polarization capacity was responsible for the large slow time curves of counter E.M.F. produced by the flow of direct current. (For this purpose it was necessary that the cells be in the regular state.) With external contacts at the ends of ceils, a large f...
متن کاملThe Direct Current Resistance of Valonia
A direct current bridge with vacuum tube detector is described for measuring the resistance of living cells. Methods for evaluating the surface of contact with the protoplasm, and the leakage around the cell wall, allow us to calculate the effective resistance of the protoplasm. In Valonia ventricosa this is usually at least 10,000 ohms per square centimeter and is often much higher. This is in...
متن کاملThe Electrical Capacity of Valonia
Impaled cells of Valonia were balanced in a Wheatstone bridge against a simple series-parallel circuit of two resistances and a capacity, the transient charge and discharge curves at make and break of direct current being recorded with a string galvanometer. With the resistances properly balanced, a series of characteristic deflections resulted when the balancing capacity was varied. With many ...
متن کاملEffect of current density on the microstructure and polarization resistance of Ni-P-TiO2-ZrO2 composite coating
Composite coatings with nickel matrix and ceramic reinforcement particles have high ability to improve surface properties, such as good corrosion and abrasion resistance. In this study, Ni-P composite coating was coated with ZrO2 and TiO2 ceramic particles on the AISI 316 steel substrate through direct current plating method. The effect of the current densities of 20, 30, 40 and 50 mA/cm2 on th...
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Background Fifty percent of infertility involves a male factor. The evaluation begins with a history, physical exam and semen analysis x 2. The history should include questions about exposure to gonad toxins. The differential diagnosis of no ejaculate includes; retrograde ejaculation, failure of ejaculation (rare), failure of emission and psychogenic. Evaluation of absence of the vas deferens w...
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ژورنال
عنوان ژورنال: The Journal of General Physiology
سال: 1936
ISSN: 0022-1295,1540-7748
DOI: 10.1085/jgp.19.4.673