Biomembranes : Passive Permeability of Cell Membranes: A by A. J. Staverman (auth.), F. Kreuzer, J. F. G. Slegers (eds.)

By A. J. Staverman (auth.), F. Kreuzer, J. F. G. Slegers (eds.)

Show description

Read Online or Download Biomembranes : Passive Permeability of Cell Membranes: A satellite symposium of the XXV Internationational Congress of Physiological Sciences, Munich, Germany, July 25–31, 1971, organized by the Department of Physiology, University of Nijmejen, Nijmejen, PDF

Best nonfiction_8 books

Bridging the Information Gap: for Small and Medium Enterprises

Small and medium organizations (SMEs) in all commercial international locations have a superb want for technical and medical info and product and marketplace details. SMEs additionally produce important info of mutual gain for themselves. a formal and fit improvement of SMEs in constructing, in addition to in lots of industrialized nations in Europe and somewhere else would require a couple of help providers, between which the improvement of infrastructural details prone is a key aspect.

Multi-objective Forest Planning

Many of the clinical equipment devised for woodland making plans help trees creation ignoring the life of wooded area capabilities except wooden creation. thankfully, the realisation that the wooded area making plans tools on hand at the present time don't correspond to the wishes of cutting-edge forestry has activated woodland researchers to strengthen and undertake new methodologies and ways, that are particularly aimed toward multi-objective events.

Canine Parvovirus: A New Pathogen

Dogs parvovirus (CPV), a brand new virus of the Canidae first seemed through the Seventies, yet disorder attributable to this virus was once no longer pronounced till 1978. Then inside of a number of months the virus crossed nationwide and continental barriers inflicting excessive fatality in pup populations. an analogous development of transmission was once visible in sylvatic dogs yet an infection used to be mostly subclinical.

Additional info for Biomembranes : Passive Permeability of Cell Membranes: A satellite symposium of the XXV Internationational Congress of Physiological Sciences, Munich, Germany, July 25–31, 1971, organized by the Department of Physiology, University of Nijmejen, Nijmejen,

Example text

8 constants altogether. We used however only one overall association and dissociation constant for simplicity; computations showed that the deviation induced by this simplification as against the full four-step treatment was only of the order of a few percent. The carriers Hb and Mb differ in the following points: Mb consists of one 46 F. C. , the binding curve is much steeper than that of Hb. 3 x 10 9 about 20 Computation shows that the general effect of changes in k is small for the system Hb and oxygen.

The molar concentration of Hb in the red cells is about 50 times and that of Mb in many muscles about 10 times higher than the molar concentration of dissolved oxygen. On the other hand the diffusion coefficient of Hb, 0Hb' is about 100 times smaller than the diffusion coefficient of 02' 002' at the Hb concentration present in the red cells and the diffusion coefficient of Mb, 0Mb' may be 10-20 times smaller according to the conditions in the muscles (see below). Since the flux is proportional to the product of the diffusion coefficient and the molar concentration, the fluxes of the two pigments may be of comparable magnitude as those of oxygen in physiological conditions (Kreuzer, 1970; Wittenberg, 1970).

100Al) 5 Figure 4. 98 x 10- 7 cm 2 /sec. The three pairs of curves are indicated by the same line symbols. The curves are drawn to scale for the flux contribution. P0 2 = 10 vs. 0 mm Hg. k' = 14 x 10 9 ml/M/sec. k = 11 sec-I. 48 F. C. HOOFD The effective thickness or actual diffusion path of the layer is often uncertain because the liquid space and the tortuosity of the channels are unknown. , the diffusing particles move around obstacles arranged at random. From this we deduced that the mean diffusion path should be 57% longer than the physical membrane thickness, in our case 150 p + 57% = 235 p.

Download PDF sample

Rated 4.16 of 5 – based on 5 votes