Journal of Membrane Science, 6 (1980) l-3 1 o Elsevier Scientific Publishing Company, Amsterdam -Printed in The Netherlands

Editorial

This special issue of the Journal of Membrane Science contains selected papers from two membrane symposia held in Europe in 1978. The fist was held March 6-9 at Tutzing Castle located south of Munich, Federal Republic of Germany, and the second was part of an international chemical engineering meeting held in Prague, Czechoslovakia, August 21-25. For the sake of completeness, the entire program of membrane-related papers from these two conferences is reproduced here. The purpose and scope of the meetings are described in Guest Editorials written by the organizers of the two conferences,

15th Tutzing Symposion der DECHEMA

0. Kedem, “Biologische und technische Membranen - Darstellung des Pro- blems”

H.H. Martin, “Biologische Membranen am Beispiel der Membranen von Bakterien”

V. Braun, “Biochemie der Substrattranslokation durch Membran-Lipopro- tein-Schichten”

G. Hauska and G. Orlich, “Electron and Proton Transport in Biological Membranes”

W. Pusch and A. Walch, “Technische Membranen und Membranverfahren” W. Vijlkel, W. Halwachs and K. Schiigerl, “Copper Extraction by means of a

Liquid Surfactant Membrane Process” W. Halwachs, E. Flaschel and K. Schiigerl, “Liquid Membrane Transport - A

Highly Selective Separation Process for Organic Solutes” P. Lguger, “Ionencarrier” H.H. Kohler and K. Heckmann, “The Relation Between Binding Affinities

and Selectivity of a Pore” E. Sackmann and H. Gruler, “Lipidstrukturen” K. Ring, “Lipide von Mikroorganismen” W.A.P. Luck, “Struktur wtissriger Systeme - Insbesondere von Membranen

und Grenzflachen” P. Geck and E. Heinz, “Sekundar-aktiver Transport” R.W. Baker and H.K. Lonsdale, “Coupled Transport” G. Manecke and H.-G. Vogt, “Some Reactive Polymers and Immobilized

Enzymes” A. Trebst, “Biokonversion solarer Systeme” U. Zimmermann, “Organspezifische Applikation von Wirkstoffen iiber zel-

luhire Tr%gersysteme”

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6th International Congress of Chemical Engineering, Chemical Equipment Design and Automation (CHISA)

J. Bor and P. Mikol& “Membranes for Reverse Osmosis, Their Laboratory and Industrial Forms”

P. Broke;, “Concentration of Fluid Food by Ultrafiltration, Reverse Osmosis, and Osmosis”

V. Mavrov and J. Mann, “The Application of Reverse Osmosis to the Con- centration of Black Sea Water”

J.W. Carter and P.G. Newick, “The Prediction of Product Flux and its Purity in Ultrafiltration Flow Systems”

M. Lopez and B. Hallstrom, “Rotary Semipermeable Membranes” Q.T. Nguyen, P. Aptel and J. Neel, “Application of Ultrafiltration to the

Concentration and the Separation of Solutes of Low Molecular Weight” H. Strathmann and H.D. Saier, “Selective Removal of Heavy Metal Ions from

Aqueous Solution by Ultrafiltration of Macromolecular Complexes” E. Drioli and B. Cortese, “Ultrafiltration Processes for Pollution Control and

Chemical Reuse in the Tanning Industry” 8. Schlosser and E. Kossaczky, “ Influence of Emulsion Properties on Pertrac-

tion of Phenol from Water” i. Schlosser and E. Kossaczky, “ Comparison of Pertraction through Liquid

Membranes and Liquid-Liquid Extraction” D. Bouchez, G. Casamatta and H. Angelino, “Liquid Membrane Separation:

Influence of Tensio-Actives or Additives to Achieve Higher Transfer Rates”

L. Boyadzhiev and G. Kyuchoukov, “Further Development of Carrier- Mediated Extraction”

A, Kopp, R. Marr and F. Moser, “Liquid Membranes which Pump - A Clas- sification of Emulsion Behavior and Theoretical Consequences”

J. Stelmaszek and L. aadek, “Application of the Liquid Membrane Method for Mixture Separation”

EL. Cussler and D.F. Evans, “Liquid Membranes for Separations and Reac- tions”

R.W. Baker, H.K. Lonsdale and W.C. Babcock, “Separation and Concentra- tion of Metals with Coupled Transport Liquid Membranes”

M.A. El Rifai, S.S. El Nashaie H. Abou El Fath and M.M. El Ansary, “Multi- plicity and Hysteresis in Active Biological Membranes, II. An Immobilized Mono-enzyme Distributed through the Membrane”

I. Dobrevsky and A. Zvezdov, “Investigation of the Pore Structure in Ion-ex- change Membranes”

V. Kudela, J. Vacik and J. KopeGek, “ Strong-Acid Membranes with En- hanced Hydrophilicity”

C. Gostoli and A. Gatta, “Mass Transfer in a Hollow Fiber Dialyzer” H. Riidicker and U. Kroll, “Effect of Gas Composition on the Permselectiv-

ity in Gas Permeation”

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L.A.J. Verhoeye, H.I. Peeters and P.F.E. Vanderstraeten, “The Permeation of Hydrocarbons through Polyethylene Membranes”

E. Nagy, 0. Borlay and U. Ujhidy, “Membrane Perme&on of Water-Alcohol Binary Mixtures”

K. Bauckhage and K. Hirschmann, “Calculation of Mass Transfer through a Tubular Membrane with Finite Geometry”

M. Mahczak, “High-temperature Electrodialysis of Mining Wastes”