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Digitale Medien

Isolation and characterisation of a strain of Pseudomonas putida that can express a periplasmic nitrate reductase (1995)

Carter, J. P. ; Richardson, David J. ; Spiro, S.

Springer

Archives of microbiology 163 (1995), S. 159-166

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ISSN: 1432-072X

Schlagwort(e): Keywords Denitrification ; Pseudomonas putida ; Nitrate reductase ; Periplasm ; Aerobic nitrate respiration

Quelle: Springer Online Journal Archives 1860-2000

Thema: Biologie

Notizen: Abstract A strain of Pseudomonas putida that can express a nitrate reductase that is located in the periplasmic compartment was isolated from freshwater. The enzyme was active in vivo during arginine fermentation and at the onset of oxygen limitation in batch cultures. The activity of the enzyme increased the yield of bacteria following fermentative growth under anoxic conditions with arginine, but nitrate reduction did not support growth on non-fermentable carbon substrates under anoxic conditions. Cells expressing the periplasmic nitrate reductase were capable of reducing nitrate in the presence of oxygen. Nitrate reduction under oxic conditions was clearly coupled to a respiratory electron transport chain because: (1) the process was sensitive to the respiratory inhibitors rotenone and 2-n-heptyl-4-hydroxyquinoline N-oxide, and (2) membrane-bound and periplasmic cytochromes were involved. This is the first report of the presence of a periplasmic nitrate reductase in a member of the γ proteobacteria.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00305348

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Digitale Medien

Hemocytes and granular cell fragments of Tipula paludosa larvae (1987)

Carter, J. B. ; Green, E. I.

New York, NY : Wiley-Blackwell

Journal of Morphology 191 (1987), S. 289-294

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ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Notizen: Five morphological categories of hemocyte (prohemocyte, ameboid plasmatocyte, spindle-shaped plasmatocyte, oenocytoid, and granular cell) were observed by light and electron microscopy of hemolymph from Tipula paludosa larvae. In addition, vast numbers of membrane-bounded granule-containing fragments were present, and were also found in the larval hemolymph of four other Tipula spp. The fragments appear to be derived from the granular cells, which readily fragment. Granules in the granular cells and the fragments appear to have similar substructure. Melanization and coagulation of the hemolymph occur rapidly on exposure to air; the granular cell fragments may be concerned with one or both of these processes.

Zusätzliches Material: 16 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1051910308

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Digitale Medien

The juxtaglomerular apparatus in fetal and newborn mice (1967)

Kaylor, C. T. ; Carter, J. M.

New York, NY [u.a.] : Wiley-Blackwell

The @Anatomical Record 159 (1967), S. 171-177

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ISSN: 0003-276X

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Medizin

Notizen: Kidneys of timed fetal and newborn mice of the C57BL stock were sectioned and stained with a modified Bowie technique. The juxtaglomerular cells, indentifiable by their granularity and position, were recognized rather late in fetal life - three or four days before birth. By the eighth day postpartum, the granular cells of the JGA had reached a peak of differentiation and closely resembled the adult JGA in their number, size, granularity, and position. The mesangial cell was often but not always granulated. The granular cell indices (G.C.I.) of fetal, newborn, and adult mice are compared. The high G.C.I. in fetal kidneys in our studies should account for the high renin titre found by others in fetal kidney extracts.

Zusätzliches Material: 1 Tab.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/ar.1091590206

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