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1.


   
    INACTIVATION OF BACTERIAL LUCIFERASES BY N-ETHYLMALEIMIDE [Text] / T. P. SANDALOVA, N. A. TYULKOVA // Biochem.-Moscow. - 1992. - Vol. 57, Is. 6. - P. 552-558. - Cited References: 21 . - ISSN 0006-2979
РУБ Biochemistry & Molecular Biology
Рубрики:
AMINO-ACID SEQUENCE
   NUCLEOTIDE-SEQUENCE

   REACTIVE SULFHYDRYL

   PHOTOBACTERIUM-LEIOGNATHI

   VIBRIO-HARVEYI

   BIOLUMINESCENCE

   SUBUNIT

   REGION

   GENE

Кл.слова (ненормированные):
LUCIFERASE -- N-ETHYLMALEIMIDE
Аннотация: The kinetics of inactivation of luciferases from four species of luminescent bacteria by the thiol reagent N-ethylmaleimide were investigated The dependencies of inactivation on ionic strength differed among the enzymes. Increasing the molarity of the buffer increased the rate of inactivation of all luciferases except that of Vibrio harveyi. Modification of Photobacterium phosphoreum luciferase decreased the maximal intensity of bioluminescence, whereas modification of Photobacterium leiognathi and Vibrio fischeri luciferases in high ionic strength buffers decreased the maximal intensity of bioluminescence and changed the luminescence decay rate constant. High ionic strength apparently alters the conformational states of the luciferases.

WOS : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
SANDALOVA, T.P.; TYULKOVA, N.A.

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2.


   
    Degradation of P(3HB) and P(3HB-co-3HV) in biological media / E. I. Shishatskaya [et al.] // Journal of Biomaterials Science, Polymer Edition. - 2005. - Vol. 16, Is. 5. - P643-657, DOI 10.1163/1568562053783678 . - ISSN 0920-5063
Кл.слова (ненормированные):
Degradation rate -- Fiber properties -- Morphology -- Poly(hydroxybutyrate-co-hydroxyvalerate) (P(3HB-co-3HV)) -- Polyhydroxyalkanoates(PHAs) -- Polyhydroxybutyrate (P(3HB)) -- Copolymers -- Degradation -- Differential scanning calorimetry -- Enzymes -- Morphology -- Scanning electron microscopy -- Tensile strength -- Tissue -- Transmission electron microscopy -- Degradation rate -- Fiber properties -- Polyhydroxyalkanoates (PHAs) -- Polyhydroxybutyrate (P(3HB)) -- Biopolymers -- buffer -- copolymer -- poly(3 hydroxybutyric acid) -- polyhydroxybutyrate hydroxyvalerate copolymer -- unclassified drug -- animal experiment -- animal model -- animal tissue -- article -- biodegradation -- controlled study -- crystal structure -- fiber -- giant cell -- in vitro study -- in vivo study -- macrophage -- morphology -- nonhuman -- pH -- priority journal -- rat -- structure analysis -- tensile strength -- tissue water -- weight reduction -- Animals -- Biodegradation, Environmental -- Buffers -- Humans -- Hydrogen-Ion Concentration -- Hydroxybutyrates -- Macrophages -- Microscopy, Electron, Scanning -- Microscopy, Electron, Transmission -- Muscle, Skeletal -- Polyesters -- Rats -- Rats, Wistar
Аннотация: The biodegradability of oriented fibers made of polyhydroxybutyrate (P(3HB)) and its co-polymer with ?-hydroxyvalerate (P(3HB-co-3HV)) was investigated in buffer solutions and in biological media in vitro and in vivo. The fibers of both polymer types demonstrated resistance to hydrolytic degradation in buffer solutions at 38В°C and pH from 4.5 to 7.0 (for up to 180 days). It has been found that the biodegradation of the fibers in vitro in blood and serum and in vivo is accompanied by weight losses and minor changes in the microstructure with no significant losses in the tensile strength over a long time (up to 180 days). The biodegradation rate of the less crystalline co-polymer P(3HB-co-3HV) fibers was 1.4-2.0-times higher than that of the homopolymer P(3HB). It has also been shown that the degradation of the fibers in vivo is influenced both by tissue fluid enzymes and cells (macrophages and foreign-body giant cells). The fibers were eroded on the surface only with no gross defects and no dramatic effects on their mechanical performance. В© VSP 2005.

Scopus
Держатели документа:
Institute of Biophysics of Siberian Branch of Russian Academy of Sciences, Akademgorodok, Krasnoyarsk 600326, Russian Federation
Department of Cardiac Surgery, University of Glasgow, Royal Infirmary, 10 Alexandra Parade, Glasgow G3, United Kingdom : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Shishatskaya, E.I.; Volova, T.G.; Gordeev, S.A.; Puzyr, A.P.

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