151
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Li G, Kessler D, Sander L. Sidebranching of the Saffman-Taylor finger. PHYSICAL REVIEW. A, GENERAL PHYSICS 1986; 34:3535-3538. [PMID: 9897690 DOI: 10.1103/physreva.34.3535] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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152
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Ward MJ, Plunket S, Kessler D. Caregiving in adolescent mothers: Sources of individual differences. Infant Behav Dev 1986. [DOI: 10.1016/s0163-6383(86)80404-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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153
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Ward MJ, Plunket S, Kessler D. Mothers' memories of the Brazelton Neonatal Assessment Scale: Implications for intervention. Infant Behav Dev 1986. [DOI: 10.1016/s0163-6383(86)80405-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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154
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Link KH, Kessler D, Aigner KR. Dose response of mitoxantrone in cell lines and human solid tumor biopsies with first results in regional chemotherapy. J Cancer Res Clin Oncol 1986. [DOI: 10.1007/bf02580141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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155
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Clarke RL, Fernandes DN, Hardy JE, Hemingway RJ, Kessler D, Lefcoe AH, Loken C, McPherson AC, Pinfold JL, Romo WJ, Saly R, Watson PJ. New limits on the production of anomalous nuclear fragments in deuteron-deuteron collisions. Int J Clin Exp Med 1986; 33:19-24. [PMID: 9956438 DOI: 10.1103/physrevd.33.19] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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156
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Achenbach F, Achenbach U, Kessler D. Calcium binding sites in plasmodia of Physarum polycephalum as revealed by the pyroantimonate technique. J Histochem Cytochem 1984; 32:1177-84. [PMID: 6386974 DOI: 10.1177/32.11.6386974] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
Plasmodia of the acellular slime mold, Physarum polycephalum, were treated with an osmium tetroxide fixative containing potassium pyroantimonate to precipitate calcium and thereby localize calcium binding sites and sites of increased calcium concentration. Dense calcium pyroantimonate precipitates were detected within the nucleoli. The distribution of these precipitates during interphase and mitosis coincides with the distribution of the unique minichromosomes in Physarum, i.e., the numerous short pieces of extrachromosomal nucleolar chromatin containing segments of amplified DNA coding for ribosomal RNA. Calcium pyroantimonate precipitates were present as frequent dense granules in the mitochondrial matrix and as fine precipitates in the mitochondrial nucleoid. Large calcium-containing precipitates were seen within cytoplasmic vacuoles, confirming reports by others. In addition, we have identified calcium binding sites along the cytoplasmic surface of the plasma membrane. The distribution of calcium within the plasmodium is discussed in relation to the assembly of the mitotic spindle and the regulation of cell motility.
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157
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Kessler D. [Retirement in peril?]. REVUE FRANCAISE DES AFFAIRES SOCIALES 1984; 38 Suppl:69-83. [PMID: 12177888] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/18/2023]
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158
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Kessler D. Patient apathy and staff burnout--fighting back. NEPHROLOGY NURSE 1983; 5:41, 54. [PMID: 6555587] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/05/2023]
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159
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Owens E, Kessler D, Raggio M. Results for some patients with cochlear implants on the minimal auditory capabilities (MAC) battery. Ann N Y Acad Sci 1983; 405:443-50. [PMID: 6575666 DOI: 10.1111/j.1749-6632.1983.tb31659.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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160
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Zigler JS, Gery I, Kessler D, Kinoshita JH. Macrophage mediated damage to rat lenses in culture: a possible model for uveitis-associated cataract. Invest Ophthalmol Vis Sci 1983; 24:651-4. [PMID: 6841016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
Rat lenses incubated in the presence of "activated" murine peritoneal macrophages are markedly impaired in their ability to accumulate certain radio-labeled compounds from the culture medium whereas incubation with resident macrophages has no such effect. The damage to the lens can be prevented in part by addition of certain antioxidants to the culture medium. The results suggest that mediators released by activated macrophages may be involved in initiation of the cataracts associated with chronic ocular inflammation.
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161
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B. D, Kessler D, Strauss-Kahn D. L'épargne et la retraite L'avenir des retraites préfinancées. POPULATION 1983. [DOI: 10.2307/1532667] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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162
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Martin T, Covert D, Chi E, Kessler D, Moore W, Muramoto A, Altman L, Butler J. Acute Pulmonary Effects of Mt. St. Helens Volcanic Ash. Chest 1982. [DOI: 10.1378/chest.81.5_supplement.71s] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
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163
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Shoemaker RL, Bartels PH, Hillman DW, Jonas J, Kessler D, Shack RV, Vukobratovich D. An ultrafast laser scanner microscope for digital image analysis. IEEE Trans Biomed Eng 1982; 29:82-91. [PMID: 7056561 DOI: 10.1109/tbme.1982.325013] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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164
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Kessler D, Shack RV. Dynamic optical tests of a high-speed polygon. APPLIED OPTICS 1981; 20:1015-1019. [PMID: 20309251 DOI: 10.1364/ao.20.001015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
A dynamic optical deformation test for a high-speed polygon is described in which a laser beam is reflected off a rotating polygon and is focused on a pair of Ronchi rulings at 45 degrees to each other. The astigmatism and defocus terms of the deformation are measured and mapped over any one of the polygon facets. The relatively simple and sensitive setup is also used for testing pyramidal error, facet-to-facet angle error, and axis-to-facet interval deviations.
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165
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Bartels PH, Buchroeder RA, Hillman DW, Jonas JA, Kessler D, Shoemaker RM, Shack RV, Towner D, Vukobratovich D. Ultrafast laser scanner microscope: design and construction. ANALYTICAL AND QUANTITATIVE CYTOLOGY 1981; 3:55-66. [PMID: 7235391] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
The design of an ultrafast laser scanner microscope has been completed, and an experimental model has been constructed. Details of the novel objective lens design, the automatic focus system, the high-speed polygon scanner and the fast clock system are given. Results from initial tolerance testing as well as the first recorded images are presented.
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166
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Kessler D, Eisenlohr LC, Lathwell MJ, Huang J, Taylor HC, Godfrey SD, Spady ML. Physarum myosin light chain binds calcium. CELL MOTILITY 1980; 1:63-71. [PMID: 6216954 DOI: 10.1002/cm.970010106] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Myosin from the slime mold Physarum polycephalum contains three sizes of polypeptides: a heavy chain and two light chains, LC-1 and LC-2. Using a simple qualitative test for calcium binding by comparing electrophoretic migration of the polypeptides in sodium dodecyl sulfate (SDS) acrylamide gels in the presence and absence of calcium, we have found that Physarum myosin light chain LC-2 migrates with an apparent molecular weight of 16,900 daltons in the presence of the metal ion chelator ethylene glycol bis (B-aminoethyl ether) N,N'-tetraacetic acid (EGTA). However, if calcium chloride is added to the sample prior to electrophoresis, the apparent molecular weight decreases to 16,100. Lanthanide and cadmium ions, but not magnesium, can substitute for calcium. Because the ionic radii of Ca2+, La3+, and Cd2+ are almost identical, we conclude that Physarum myosin LC-2 possesses a very size-specific binding site for calcium. Physarum myosin LC-1 and the heavy chain give no evidence for binding calcium by this test. Since cytoplasmic streaming in the plasmodium of Physarum requires calcium, our evidence indicates that the calcium-binding property of Physarum myosin LC-2 may be important in regulating the production of force by actomyosin in the ectoplasm. Unexpectedly, the myosin light chain in Physarum capable of binding calcium, LC-2, is the essential light chain, while LC-1 is a member of the regulatory class of myosin light chains [V. T. Nachmias, personal communication]. Until now, essential myosin light chains have not been shown to have high affinity divalent cation binding sites. This means a new version of the myosin-based model for actomyosin regulation by calcium may be required to explain cytoplasmic movement in Physarum, and perhaps in other motile systems involving cytoplasmic myosins as well.
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167
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Kessler D, Nachmias VT, Loewy AG. Actomyosin content of Physarum plasmodia and detection of immunological cross-reactions with myosins from related species. J Biophys Biochem Cytol 1976; 69:393-406. [PMID: 944188 PMCID: PMC2109671 DOI: 10.1083/jcb.69.2.393] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
The content of myosin in plasmodia of the myxomycete Physarum polycephalum was measured by an immunological technique, quantitative microcomplement (C') fixation. Migrating plasmodia (starved after growth on rolled oats) contained 0.60 +/- 0.08 (SD) mg myosin per g fresh plasmodia. Myosin comprised 0.77% +/- 0.05 (SD) of the total plasmodial protein. When total plasmodial proteins were separated by electrophoresis on SDS-polyacrylamide gels, a large amount of protein appeared in a band comigrating with muscle actin. Densitometry performed after Coomassie blue staining indicated that as much as 15-25% of the total protein in the plasmodium could be actin. This gives an actin/myosin ratio by weight in the myxomycete plasmodium as high as 19-33, a very "actin-rich" actomyosin compared with rabbit skeletal muscle actomyosin with an actin/myosin ratio of 0.6. Starvation stimulates rapid migration and is correlated with a higher percent of both myosin and actin in the total protein of the plasmodium compared with normally growing cultures. Immunological cross-reaction of myosins from a variety of species was measured by C' fixation using an antiserum produced against purified native myosin from P. polycephalum. Although myxomycete and vertebrate striated muscle myosins have very similar morphological and biochemical properties, and apparently possess similar binding properties to F-actin, only myosins from myxomycetes in the order Physarales, rather closely related to P. polycephalum, gave detectable cross-reactions. This finding suggests that many amino acid sequences in myosin have been variable during evolution.
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168
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Nachmias VT, Kessler D. Antibody to Physarum myosin. I. Preparation and functional effects. Immunology 1976; 30:419-24. [PMID: 130343 PMCID: PMC1445155] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Preparation of antibody to Physarum myosin is described, and evidence is presented that the antibody is specific for this molecule. A diffusion coefficient of 1 X 10(-7) cm2/s is estimated. The antibody interfered with myosin enzyme activity and with superprecipitation of actomyosin. It did not cross-react with rabbit striated muscle myosin.
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169
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Kessler D. On the location of myosin in the myxomycete Physarum polycephalum and its possible function in cytoplasmic streaming. JOURNAL OF MECHANOCHEMISTRY & CELL MOTILITY 1972; 1:125-37. [PMID: 4681657] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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170
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Littleton C, Kessler D, Burkholder PM. Cellular basis for synthesis of the fourth component of guinea-pig complement as determined by a haemolytic plaque technique. Immunology 1970; 18:693-704. [PMID: 4911895 PMCID: PMC1455583] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
Cells from several tissues of the guinea-pig were assayed by a modified Jerne plaque technique for production of the fourth component of complement. Formation of haemolytic plaques was interpreted as in vitro production of C4 by those cells observed in the centres of plaques. C4 production was detected in mononuclear cells from peritoneal exudates, lung washings, and liver. Production of C4 was detected with less frequency in mononuclear cells from spleen, lymph node, bone marrow and thymus. Plaque formation was inhibited by incubating cells with puromycin or cycloheximide. This indicated that plaque formation was the result of in vitro synthesis of C4. The results of this study are compatible with the concept that the reticulo-endothelial system is involved in synthesis of complement components.
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171
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Anderson HL, Hargrove CK, Hincks EP, McAndrew JD, McKee RJ, Barton RD, Kessler D. Precise Measurement of the Muonic X Rays in the Lead Isotopes. ACTA ACUST UNITED AC 1969. [DOI: 10.1103/physrev.187.1565] [Citation(s) in RCA: 75] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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172
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Fry RJ, Kessler D, Kisieleski WE, Weber CL, Griem ML, Malkinson FD. A method for the study of cell proliferation of the hair follicle. ANL-7535. ANL 1968:77-80. [PMID: 4897575] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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173
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Kessler D, Levine L, Fasman G. Some conformational and immunological properties of a bovine brain acidic protein (S-100). Biochemistry 1968; 7:758-64. [PMID: 4966933 DOI: 10.1021/bi00842a034] [Citation(s) in RCA: 94] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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174
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Kessler D. Nucleic acid synthesis during and after mitosis in the slime mold, Physarum polycephalum. Exp Cell Res 1967; 45:676-80. [PMID: 6067128 DOI: 10.1016/0014-4827(67)90170-x] [Citation(s) in RCA: 28] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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175
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