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director of CVR1; Dr. Harold P. Klein, director of Life Sciences at Ames; Dr. Robert Boftomolni and Dr. Richard Lozier, both of UCSF and working at Ante*, and Dr. Janos Lanvi of Ames. li. hahhlum has been known for ubotil I0U > cars, and L responsible fur pink cyo in salted fish and the red in red herring. It also causes the pink to purple color that can be seen at the edges of bodies of salt xvuter where the salt concentration has reached the 2.5 to 3 molar (M) level the hacterium requires (nor ma) salt water is about 0.2 M). Di. jiuv>.Nuiiu luld Lidu-itruil He- scorch that possibilities for practical applications of the bacterium itself were "overemphasized,'* and that the `bug'* itself would most likely not find use in desalination, fertilizer production, or photovoltaic produc tion of electricityHe did note, however, that studies of the structure end mechanisms of H. hetobium should reveal important knowledge about Ion pumping, nu trient transport, ceu membrane structure and function, and protein structure. It is also possible, he added, that studies of the photovoltaic operation of the purple pigment could lead to PMOTOMICftOOMPM OP MCTfJtitfM smoother area* are purple membrane improved photovoltaic devices, os well as new knowledge about the workings of the eye and sight in general. Perhaps the most immediate bene* fit from the studies of H. hafobium will bo its possibilities for use in genetic engineering, said Dr. Stucckenius. Because of its unique require ments for an environment of high salt concentration and high tempera ture, the bacterium is a natural for biological containment (see January 1976, p. 45, and February 1976, p. 25). "It would excel for that use," said Dr. Stoeckenius. It cannot sur vive ut the comparatively low tem perature and salt concentration of the human body." Pseudomonas strain expected to bug PCBs One or the most unpleasant and costly pollutants to emerge in recent years has be .n the family of polychlorinated biphenyls. PCBs, used in manufacturing pro cesses for products as diverse ai transformers and printing inks, are toxic to both humans and animals. Fish in freshwater rivers have been ' BAU8CH liOMB ........ .... for those? who demand high optical performance ; with unparalleled versatility. Optimum Ians design for crisp,.) _ 3. High resolution--st laast 300 llnes/mm at 70Xand proportionate at otherpowem.'i.'^wife-'' 4. Conventional oKfull 180 reversed eyepiece orientation on any stand. ' 5. Eaay-to^&arifXS'Inclined eyepieces, synchro-geared for symmetrical aeparatlon:4 6. Varsatillty-rchoosa from ,3 ayeplaces.5 supplementary lenses, 8 stands ande aiumBiiiit6di^sr--l^>tfj^^.vw-^y*'-::i*^3f-s>S&- 7. Camara accessories--three formats to meet your requirements. PLUS:"' baey trammg with a 10X wide lieid view-finder- . > Exposure meter to eliminate guesswork--you get the correct setting relative to Him,peed and camera magnification. . Viewing and image composition through yotir regular eyepieces. -S'-Vf,.M'djr; ...... .......... . ; TfcjlSbttiiibesX'-d..'..r'Zoiab , ii HONS 035999 Bautch & Lomb SttreoZoom 7----write for free catalog and demonstration. Beusch & Lomb, Scientific Optical Products Division; 91305 North Goodman Street; Rochester. New York 14602 CIRCLE 114 ON INQUIRY CARD 1 I It's easier to use particularly affected by rCBs in in dustrial effluents. The extraordinary stability of the Gyrolok...all.. oily organic chemicals has increased the problem. But now Dr. Dickson Liu, a biochemist at the Canada sizes assemble Center for Inland Waters, Burling* ton, Ontario, has devised a double* banded technique for splitting the same way PCBs into harmless fragments. The method involves physics and biochemistry. Waste waters con Gyrolok; one set of instructions covers all sizes. One and one quarter turns and no special tools. No special instructions for smaller sizesor for "high pressure" applica- , lions. With Gvrolok you only . have to remember one , thing--enugit up oue^ -riiv and.a-quarter turns for nil '. . sizes and you've got It ,`u made--a perfect connection. Write todayfor the com- --H plete Gyrolok Flareless Tube..*.' taining PCBs are first exposed to ultiusound, which vibrates the organic chemicals into millions of tiny globules. This gives the PCDs an extremely large surface area, which is retained by the addition of an emulsifying agent. Liu then introduces a specially developed strain of Pseudomonas bacteria into lhe mixture. The bacteria consume the organic chains of the PCBs at appropriate points, thus rendering the chemicals harm* less. Results to date have been spec, tacular. Concentrations of even the GYfiOLOK ...ornoLox oivtstoN op hoke, inc. 1 TenaklN Perk. CreklH. N. J. 07*21 MMUM rumm mwrmmm most resistant PCBs have been re* duccd by the bacteria from 300,000 to 19 parts per billion, well below the federally mandated standard of 5,000 ppb. So far, the technique CIRCLE lie ON INQUIRY CARO has proved itself on a small scale, but Liu is now developing an in dustrial-scale operation. A genetically modified strain of Pseudomonas was developed by CULTONS 'fast change" /"R's 1975 Scientist of the Year, Dr. A.M. Chakrabarty of Ceneral Elec tric, to digest most of crude oil and artist render it non-polluting (sea January 1976, p. 45). Lets you change or replace signal conditioners In seconds. Use your Gulton portable recorder to chart volts, amps, temperature, EKG, strain, ac to dc, log to dc and more ... simply by plugging in appropriate signal conditioners. Should any signal conditioner require testing or service, just slide It out and slide in a spare. It's as easy as it sounds. Gulton portable recorders with plug-ins are available in 2, 4, 6 and 8 channel models. Write or call tor 12 page portables catalog. ELECTRONICS minicomputers monitor oil tsnkors Advanced technology developed in new U.S. Navy ship programs is beginning to find its way into com mercial use and promises to be the start of many new applications for high technology devices. An example is the new marine trend analysis system being built by Litton Industries' Automated Marine Systems Divisions, Woodland Hills, Cal. it is expected to have major im pact on future operation of large oil tankers. In a paper presented earlier this year to the British Institute of Marine Engineers, marine expert D. K. Batten of Lloyd's Register of Shipping predicted the planned CIRCLE 117 ON INQUIRY CARD 38 iNoraniML HtumMUT HONS 036000