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  • 1
    Electronic Resource
    Electronic Resource
    LSU Center for Advanced Microstructures and Devices : INTERNATIONAL CONFERENCE ON SYNTHROTRON RADIATION INSTRUMENTATION TSUKABA (JAPAN) (1989)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 60 (1989), S. 2144-2147 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: The LSU Center for Advanced Microstructures and Devices (CAMD) is a DOE-funded materials science and engineering laboratory which will include a normal-conducting compact electron storage ring optimized for the production of soft x rays. The focus of CAMD is the fundamental study of processing and analysis technologies—including x-ray lithography—important to microstructure fabrication and electronic device development. Design details of the storage ring, which is being acquired commercially, are presented in this article.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1140804
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  • 2
    Electronic Resource
    Electronic Resource
    Genetic Coding Theory: Alternative Genetic Codes (1984)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 435 (1984), S. 0 
    Details
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-6632.1984.tb13876.x
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  • 3
    Electronic Resource
    Electronic Resource
    Effects of salinity fluctuation on the hemolymph composition of the blue crab Callinectes sapidus (1978)
    Springer
    Marine biology 46 (1978), S. 9-15 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The hemolymph of the blue crab Callinectes sapidus was hyperosmotic during 20-10-20‰ S and 30-10-30‰ S diurnal cycles. The hemolymph became isosmotic at 26‰ S and hyposmotic at 28‰ S in the 10-30-10‰ S diurnal cycle. Hemolymph Na+ was hyperionic to seawater throughout all cycles. Hemolymph Cl- was hyperionic below 24‰ S and either isionic or hypoionic from 24 to 30‰ S. Hemolymph K+ concentrations were hyperionic below 26‰ S and either isionic or hypoionic from 26 to 30‰ S. Hemolymph Mg++ values were hypoionic over the experimental salinity range (10 to 30‰). Hemolymph ninhydrin-positive substances (NPS) levels were directly related to ambient salinity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00393814
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  • 4
    Electronic Resource
    Electronic Resource
    Effects of salinity fluctuations on the respiration rate of the southern oyster drill Thais haemastoma and the blue crab Callinectes sapidus (1978)
    Springer
    Marine biology 49 (1978), S. 59-67 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Respiration rates of Thais haemastoma and Callinectes sapidus were determined as a function of salinity with a flow-through respirometer at 20°C. Respiration rates were measured at 10, 20 and 30‰ S for acclimated animals. The effects of 10-5-10‰, 20-10-20‰, 30-10-30‰ and 10-30-10‰ S semidiurnal cycles (12 h) of fluctuating salinity on the rate of respiration of the oyster drill were studied. During each cycle, salinity was changed from the acclimation salinity over a 4 h interval, held at that salinity for 2 h, returned to the acclimation salinity over 4 h and held at that salinity for 2 h. The effects of diurnal (24.8 h) salinity cycles on respiration in the oyster drill and blue crab were also studied. Salinity was changed from the acclimation salinity over a 10.4 h interval, held at that salinity for 2 h, then returned to the acclimation salinity over 10.4 h and held at that salinity for 2 h. The respiration rate of 30‰ S acclimated oyster drills (679 μl O2 g dry weight−1 h−1) was significantly higher than for individuals acclimated to 10‰ S (534 μl O2 g dry weight−1 h−1). Blue crab respiration was 170 μl O2 g dry weight−1 h−1 at 30‰ S, and was significantly higher at 10 and 20‰ S than at 30‰ S. With the exception of the 20-10-20‰ S semidiurnal cycle, the respiration rate of oyster drills declined as salinity fluctuated in either direction from the acclimation salinity and increased as ambient salinity returned to the acclimation salinity. Semidiurnal cycles (12 h) of fluctuating salinity produced greater changes in the respiration rate of snails than analogous diurnal cycles (24.8 h). A 10-30-10‰ S pattern of fluctuation caused a greater percentage reduction in the steady state respiration rate of oyster drills than the 30-10-30‰ S pattern. The respiration rate of blue crabs varied inversely with fluctuating salinity. Relatively minor changes occurred in blue crab respiration rate with fluctuating salinity. Blue crab respiration rate characteristically dropped during the initial phase of declining salinity at a rate directly proportional to the rate of salinity decrease, perhaps representing a metabolic adjustment period by the blue crabs. The respiratory response of T. haemastoma to salinity is consistent with its incomplete volume regulation, while the response of C. sapidus is compatible with its ability to regulate extracellular fluid osmotic and ionic composition.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00390730
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  • 5
    Electronic Resource
    Electronic Resource
    Applications of differential geometry to molecular genetics (1985)
    Springer
    Journal of biological physics 13 (1985), S. 87-94 
    Details
    ISSN: 1573-0689
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Physics
    Notes: Abstract A mathematical formalism is presented in which changes in information content of an evolving DNA (deoxyribonucleic acid) molecule may be described. The basic construct is a 65-dimensional differentiable manifold (the informational space-time manifold) in a coordinate structure such that the manifold points represent (i) the number of each codon type in a DNA molecule, and (ii) the evolutionary time of that DNA. It is shown that this manifold cannot be Euclidean but must be taken, at least conditionally, to be Riemannian. Evolutionary motions in the informational space-time manifold are initially postulated to be geodesics, and evolutionary equations-of-motion are elaborated. These equations are governed by an evolutionary field which is produced by the intrinsic structure of the manifold. The concept of genetic cosmology is introduced, and a manifold in which the evolutionary field is weak and depends only upon the evolutionary time is investigated. The nature of empirical input into genetic cosmology is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01878385
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  • 6
    Electronic Resource
    Electronic Resource
    Genetic coding theory: Multiple mitochondrial genetic codes (1984)
    New York, NY : Wiley-Blackwell
    International Journal of Quantum Chemistry 26 (1984), S. 109-116 
    Details
    ISSN: 0020-7608
    Keywords: Computational Chemistry and Molecular Modeling ; Atomic, Molecular and Optical Physics
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The generalized genetic code is applied to alternative codings recently derived from studies of mitochondrial protein synthesis. It is argued that mitochondrial protein synthesis is comprised of a class of biological contexts, rather than a single biological context, and that there exist, therefore, multiple mitochondrial genetic codes. The evolutionary implications of multiple mitochondrial genetic codes are discussed.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/qua.560260714
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