Results 201 to 210 of about 12,687 (257)

Purine metabolism in microplasmodia of Physarum polycephalum

Biochimica et Biophysica Acta (BBA) - Nucleic Acids and Protein Synthesis, 1979
The uptake and utilization of purine nucleosides and purines in microplasmodia of Physarum polycephalum were investigated. The results revealed a unique pattern, namely that exogenous purine nucleosides are readily taken up and metabolised, while free purine bases are hardly taken up.
K, Fink, P, Nygaard
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Melanin biosynthesis during differentiation of Physarum polycephalum

Biochimica et Biophysica Acta (BBA) - General Subjects, 1977
Melanin synthesis in the myxomycete Physarum polycephalum occurs during sporulation but not during spherule formation. Melanin-like pigment was extracted from spores. An almost identical substance of polyphenols was extracted from spherules and characterized by its ultraviolet and infrared absorbance spectra.
I, Chet, A, Hüttermann
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Living Wires - Effects of Size and Coating of Gold Nanoparticles in Altering the Electrical Properties of Physarum polycephalum and Lettuce Seedlings

arXiv.org, 2015
The manipulation of biological substrates is becoming more popular route towards generating novel computing devices. Physarum polycephalum is used as a model organism in biocomputing because it can create `wires' for use in hybrid circuits; programmable ...
N. Gizzie, Richard Mayne, S. Yitzchaik, Muhamad Ikbal, A. Adamatzky   +4 more
semanticscholar   +1 more source

Slime Mould Physarum Polycephalum

2015
This chapter introduces Physarum, describing the organism, its composition, habitat, behaviour and the biological basis of its network adaptation and oscillatory phenomena. We examine how Physarum approximates computational and robotic behaviour, relating it to classical and non-classical computing approaches.
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Thermotaxis in a slime mold, Physarum polycephalum

Behavioral Biology, 1975
Physarum polycephalum is thermotactic toward 29 ± 1°C avoiding both higher and lower temperatures. 29°C appears to be a- combined optima for growth and locomotion. It is likely that thermotaxis is a more efficient way of avoiding unfavorable temperature than transforming into spherules.
W W, Tso, T E, Mansour
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Microplasmodium Dynamics of Physarum Polycephalum

2010
The slime mold Physarum polycephalum exhibits well-known oscillations of its vein network, which drive the so-called shuttle streaming of endoplasmic fluid within the veins. These oscillations are already visible in microplasmodia, which are precursors of extended networks.
E. Bernitt, C. Oettmeier, H. -G. Döbereiner   +2 more
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Ribosomal DNA in spores of Physarum polycephalum

Biochimica et Biophysica Acta (BBA) - Nucleic Acids and Protein Synthesis, 1978
DNA was isolated from plasmodia, spores and newly hatched amoebae of the slime mould Physarum polycephalum. The DNA preparations were fractionated in CsCl gradients and each fraction hybridised to combined 19 S + 26 S rRNA. In all three DNA preparations hybridisation was found to be limited to satellite DNA (rho = 1.714 g/cm3) and at saturation was ...
H U, Affolter, R, Braun
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A calcium-sensitive preparation from Physarum polycephalum

Biochemistry, 1976
Differential ultracentrifugation of an extract of the plasmodium of Physarum polycephalum yields a high-speed fraction which exhibits calcium-sensitive adenosine triphosphate activity at low ionic strength. The rate of inorganic phosphate production increased from 2- to 25-fold in different preparations when the calcium concentration was increased from
V T, Nachmias, A, Asch
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Manipulating substances with Physarum polycephalum

Materials Science and Engineering: C, 2010
Abstract The plasmodium of Physarum polycephalum is a large single cell capable for optimal spanning of food sources and avoidance of harmful stimuli. The sophisticated foraging behavior of the plasmodium can be interpreted in terms of computation.
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RNA editing in Physarum polycephalum

2000
Abstract RNAs synthesized in the mitochondria of the acellular slime mold, Physarum polycephalum, contain nucleotides which are not encoded, at least in the conventional sense, in the genes from which they are transcribed. These differences between the mitochondrial DNA and its mRNA (1–3), tRNA (4) and rRNA (5) products are due to ...
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