INTERNAL STRUCTURE AND NUCLEI IN CELLS OF ESCHERICHIA COLI AS SHOWN BY IMPROVED ELECTRON MICROSCOPIC TECHNIQUES

BAKER , J. R. 1946 The histochemical recognition of lipine . Quart. J. Microscop. Sci. , 87 , 441 - 470 .

BISSET , K. A. 1948 a The cytology of the gram-positive cocci . J. Gen. Microbiol. , 2 , 126 - 130 .

BIBSET , K. A. 1948 b Nuclear reorganization in non-sporing bacteria . J. Hyg. , 46 , 173 - 175 .

BOIVIN , A. 1947 Directed mutation in colon bacilli, by an inducing principle of deso 0y-ribonucleic nature: its meaning for the general biochemistry of heredity . Cold Spring Harbor Symposia Quant. Biol. , 12 , 7 - 17 .

CASPERSSON T. 1947 The relations between nucleic acid and protein synthesis. Symposia Soc. Exptl. Biol. 1 Nucleic acid. The University Press Cambridge England. Refer to p. 127-151.

CATCEBSIDE D. G. AND HoTEs B. 1947 The action of enzymes on chromosomes. Symposia Soc. Exptl. Biol. 1 Nucleic acid. The University Press Cambridge England. Refer to p. 225-231.

CA&MBERs R. AND STERN K. G. 1948 Protoplasm. Encyclopaedia Britannica. In press.

Coss LETT r, V. E. 1948 Recent advances in electron microscopy in the United Kingdom . Research , 1 , 293 - 305 .

DAW s ON, I . M., mD Mc FARLANE , A. S. 1948 Structure'of an animal virus . Nature , 161 , 4466 .

DELAPORTE B. 1936 Recherches cytologiques sur le groupe des coccac 6es. Compt. rend. 208 199-201.

DELAPORTE B. 1939-1940 Recherches cytologiques sur les bacteries et les cyanophyc 6es. Rev. gdn. botan. 51 615-3 689-708 748-768; 52 112-160.

DELAPORTE B. 1948 Personal communication.

DEMEREC , M. , AND FAN o, U. 1945 Bacteriophage-resistant mutants in Escherichia coli . Genetics , 30 , 119 - 136 .

DuBos R. J. 1945 The bacterial cell. Harvard University Press Cambridge Mass.

DUGUID , J. P. 1948 The influence of cultural conditions on the morphology of Bacterium aerogenes with reference to nuclear bodies and capsule size . J. Path. Bact. , 60 , 265 - 274 .

FLE w ETT , T. H. 1948 Nuclear changes in Bacillus anthracis and their relation to variants . J. Gen. Microbiol. , 2 , 325 - 333 .

HILLIER , J. 1947 Present status and future possibilities of the electron microscope . RCA Review , 8 , 29 - 42 .

HILMER , J. 1948 On the possibility of demonstrating an intermediate level of structure in normal bacteria . Program E. F. Burton Memorial Meeting, Electron Microscope Soc. of Am. J. Applied Phys. , 19 , 1188 .

HILLIER , J. 1949 Some remarks on the image contrast in electron microscopy and the twocomponent objective . J. Bact. , 57 , 313 - 317 .

HILLIER , J. , KNAYSI , G. , AND BAKER , R. F. 1948 New preparation techniques for the electron microscopy of bacteria . J. Bact. , 56 , 569 - 576 .

HILLIER , J. , MUDD , S. , AND SMITH , A. G. 1948 Observations with improved electron microscopic technics on the internal structure of Escherichia coli cells and the generation of coliphage . Am. J. Path. , 24 , 715 - 716 .

HILLIER , J. , AND RAMBERG , E. G. 1947 The magnetic electron microscope objective: contour phenomena and the attainment of higher resolving power . J. Applied Phys. , 18 , 48 - 71 .

JOHNSON , F. H. , ZWORYKIN , N. , AND WARREN , G. 1943 A study of Iuminous bacterial cells and cytolysates with the electron microscope . J. Bact. , 46 , 167 - 185 .

KLIENEBERGER-NOBEL , E. 1947 Morphological appearances of various stages in B. proteus and coli . J. Hyg. , 45 , 410 - 412 .

KNAYSI , G. 1942 The demonstration of a nucleus in the cell of a staphylococcus . J. Bact. , 43 , 365 - 386 .

KNAYSI , G. 1948 a Preliminary observations on germination of the spores of Bacillus mycoides in a nitrogen-free medium and certain properties of the transparent cells . J. Bact. , 65 , 753 - 757 .

KNAYSI , G. 1948 b The endospore of bacteria . Bact. Revs. , 12 , 19 - 77 .

KNAYSI , G. , AND BAKE i R, R . F. 1947 Demonstration, with the electron microscope, of a nucleus in Bacillus mycoides grown in a nitrogen-free medium . J. Bact. , 53 , 539 - 553 .

KINAYSI , G. , AND MUDD , S. 1943 The internal structure of certain bacteria as revealed by the electron microscope-a contribution to the study of the bacterial nucleus . J. Bact. , 45 , 349 - 359 .

LiEwis, I. M. 1942 The cytology of bacteria . Chronica Botan. , 7 , 249 - 250 .

LuixA, S. E., DELBRUCK , M. , AND ANDERSON , T. F. 1943 Electron microscope studies of bacterial viruses . J. Bact., 46, [57-78.

MALMGREN , B. , AND HED t N, C . G. 1947 Studies [of the nucleotide metabolism of bacteria . I-IV. Acta Path. Microbiol. Scand. , 24 , 417 - 495 .

MUDD , S. 1948 Submicroscopic structure of the bacterial cell, as shown by the electron microscope . Nature , 161 , 302 .

NEUMANN , F. 1941 Untersuchungen zur Erforschung der Kernverhiltnisse bei den Bakterien . Zentr. Bakt. Parasitenk. , II , 108 , 385 - 384 .

NEURATH , H. 1939 The apparent shape of protein molecules . J. Am. Chem. Soc. , 61 , 1841 - 1844 .

PEASE , D. C. , AND BAKER , R. F. 1948 Sectioning techniques for electron microscopy using a conventional microtome . Proc. Soc. Exptl. Biol. Med. , 67 , 470 - 474 .

PESIHKOV , M. A. 1945 The cytology and karyology of the colon-typhoid group . Am. Rev. Soviet Med. , 2 , 342 - 348 .

PIEKARSEI , G. 1937 Cytologische Untersuchungen an Paratyphus und Coli Bakterien . Arch. Mikrobiol. , 8 , 428 - 439 .

PIERKARSKI , G. 1938 Zytologische Untersuchungen an Bakterien im ultravioletten Licht . Zentr. Bakt. Parasitenk. I. Orig. , 142 , 69 - 79 .

PIEKARSKI , G. 1939 Lichtoptische und ubermikroskopische Untersuchungen zum Problem des Bakterienzellkerns . Zentr. Bakt. Parasitenk. I. Orig. , 144 , 140 - 148 .

PIEKARSKI , G. 1940 tUber kerniahnliche Strukturen bei Bacillus mycoides Fluigge . Arch. Mikrobiol. , 11 , 406 - 431 .

PIEKARSKI , G. , AND Rus KA, H . 1939 tJbermikroskopische Untersuchungen an Bakterien, unter besonderer Berticksichtigung der sogen. Nukleoide . Arch. Mikrobiol. , 10 , 302 - 321 .

PORTER , K. R. , CLAUDE , A. , AND FULLAM , E. F. 1945 A study of tissue culture cells by electron microscopy . J. Exptl. Med. , 81 , 233 - 246 .

Ro BINOW , C. F. 1942 A study of the nuclear apparatus of bacteria . Proc. Roy. Soc. (London), B , 130 , 299 - 324 .

ROBINOW , C. F. 1944 Cytological observations on Bact. coli, Proteus vulgaris and various aerobic spore-forming'bacteria with special reference to the nuclear structures . J. Hyg. , 43 , 413 - 423 .

ROBINOW C. F. 1945 Nuclear apparatus and cell structure of rod-shaped bacteria. Addendum to R. J. Dubos. The bacterial cell. Harvard University Press Cambridge Mass.

ROBINOW C. F. 1949 Observations on the cell structure of bacteria. In preparation.

ROBINOW , C. F. , AND CossiEnr, V. E. 1948 Nuclei and other structures of bacteria J . Applied Phys. , 19 , 124 .

SCHETT , F. 0. 1945 Ultrastructure and the problem of cellular organization . Harvey Lectures , 40 , 249 - 268 .

STANLEY , W. M. , AND ANDERSON , T. F. 1942 Electron micrographs of protein molecules . J. Biol. Chem. , 146 , 25 - 30 .

STILLE , B. 1937 Zytologische Untersuchungen an Bakterien mit Hilfe der Feulgenschen Nuclealreaktion . Arch. Mikrobiol. , 8 , 125 - 148 .

TULASNE R. AND VENDRELY R. 1947a Mise en evidence des noyaux bact 6riens par la ribonuclease. Compt. rend. soC. biol. 141 674-676.

TULASNE , R. , AND VENDRELY , R. 1947 b Demonstration of bacterial nuclei with ribonuclease . Nature , 160 , 225 - 226 .

Tu LASNE , R. , AND VENDRELY , R. 1948 Cytology of staphylococci before and after treatment with penicillin . Nature , 161 , 316 - 317 .

VENDRELY R. AND LIPARDY J. 1946 Acides nucleiques et noyaux bacteriens. Compt. rend. 223 342-344.

WILLIAMS , R. C. , AND WYCKOFF , R. W. G. 1945 a Electron shadow-micrography of virus particles . Proc. Soc. Exptl. Biol. Med. , 58 , 265 - 270 .

WILLIAMS , R. C. , AND WYCKOFF , R. W. G. 1945 b Shadowed electron micrographs of bacteria . Proc. Soc. Exptl. Biol. Med. , 59 , 265 - 270 .

WILLIAMS , R. C. , AND WYCKOFF , R. W. G. 1946 Applications of metallic shadow-casting to microscopy . J. Applied Phys. , 17 , 23 - 33 .

WYCKOFF , R. W. G. 1948 The electron microscopy of developing bacteriophage. I. Plaques on solid media . Biochim. Biophys. Acta , 2 , 27 - 37 .

ZWORYIN V. K. MORTON G. A. RAMBERG E. G. HILLIER J. AND VANCE A. W. 1945 Electron optics and the electron microscope. John Wiley and Sons New York. Refer to p. 311.