. Collected reprints / Atlantic Oceanographic and Meteorological Laboratories [and] Pacific Oceanographic Laboratories. Oceanography Richard H. Bennett, William R. Bryant, and George H. Keller 23 terial. Their techniques, however, did not involve drying, but rather followed a series replacement of the interstitial water by diffusion processes to a final hardened resin. The technique is apparently very time consuming and laborious. Photomicrographs of submarine sediment—prepared by freeze-drying, embedded with Maraglas Epoxy, and sub- jected to ultrathin sectioning—has clearly rev
. Collected reprints / Atlantic Oceanographic and Meteorological Laboratories [and] Pacific Oceanographic Laboratories. Oceanography Richard H. Bennett, William R. Bryant, and George H. Keller 23 terial. Their techniques, however, did not involve drying, but rather followed a series replacement of the interstitial water by diffusion processes to a final hardened resin. The technique is apparently very time consuming and laborious. Photomicrographs of submarine sediment—prepared by freeze-drying, embedded with Maraglas Epoxy, and sub- jected to ultrathin sectioning—has clearly revealed detailed, complex fabrics that appear to be unaffected significantly by sample preparatory techniques (Bowles 1968a, 1968b). The freeze-drying technique also is time consuming, and there is danger of ice crystallization during the process. Transmission Electron Microscopy Photomicroscopy of the clay fabric for all of the Missis- sippi Delta samples was carried out using a Philips Trans- mission Electron Microscope, Model 300, at 80 kV. The work was carried out at the Veterinary, Toxicology, and Entomology Research Laboratory, Department of Agri- culture, College Station, Texas. Under routine research con- ditions, the Philips Model 300 has a resolution of about 8X10""^" m (8 A) which can be improved for specific re- quirements (personal communication, Hilton H. MoUen- Step Techniques Instrumentation or Description s ubsa mpl ing o f c ay speci and men trim min 9 Replacement of interstitial water with ethyl alcohol I .1 / wire knife silver nitrate test visual glass containers RepI acement of ethy 1 alcoho 1 with amyl acet( ? te wrapping of specimen in lens paper Re pl acement of am y 1 acetate wil h liquid CO2 Critical point drying with CO2 Placement an d storage of individual specimen in desic cators S52_ 1^^ 0 -^ m] 0. critical point apparatus critical point apparatus glass containers specimen remains wrapped in lens paper Figure 26.—Analytical
Size: 1524px × 1639px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookcollectionamericana, bookleafnumber61, books
