Results 31 to 40 of about 6,189 (215)
Red list and checklist of the stoneworts [PDF]
, 2017 Für Berlin wurden seit dem 18. Jahrhundert 21 Arten limnischer Armleuchteralgen (Characeae) in den Gattungen Chara, Lychnothamnus, Nitella, Nitellopsis und Tolypella nachgewiesen. Davon sind 11 Arten ausgestorben oder verschollen, weitere vier Arten sind
Jahn, Regine +2 more
core +1 more source
STIMULATION BY COLD IN NITELLA [PDF]
Journal of General Physiology, 1935 Sudden local chilling causes action currents to be set up in Nitella and in Chara, an effect which does not follow gradual local chilling. This may be due to a partial solidification of the non-aqueous protoplasmic surfaces which makes them susceptible to rupture by the protoplasmic streaming.
openaire +2 more sources
ON THE ACCUMULATION OF DYE IN NITELLA [PDF]
Journal of General Physiology, 1925 Living cells of Nitella were placed in different concentrations of brilliant cresyl blue solutions at pH 6.9. It was found that the greater the concentration of the external dye solution, the greater was the speed of accumulation of the dye in the cell sap and higher was the concentration of dye found in the sap at equilibrium.
openaire +2 more sources
Italian Volcanic lakes: a diversity hotspot and refuge for European charophytes
Journal of Limnology, 2014 Macrophytes are one of the most important components of primary producers in lacustrine environments. Charophytes represent the most threatened group of macrophytes and are included in many European Red-Lists.
Mattia M. Azzella
doaj +1 more source
EFFECTS OF HEXYLRESORCINOL ON NITELLA [PDF]
Journal of General Physiology, 1940 In some ways the effects of hexylresorcinol on Nitella resemble those of guaiacol but in others they differ. Both substances depress the P.D. reversibly and both decrease the potassium effect. Hexylresorcinol decreases the apparent mobility of Na+ and of K+. Guaiacol increases that of Na+ but not of K+.
openaire +2 more sources
TRANSVERSE ELECTRIC IMPEDANCE OF NITELLA [PDF]
Journal of General Physiology, 1937 Alternating current measurements have been taken on single Nitella cells over a frequency range from 30 to 2,500,000 cycles per second with the current flow perpendicular to the axis of the cell. The measuring cells were so constructed that electrolytes of any desired concentration could be circulated during the course of the measurements.
H J, Curtis, K S, Cole
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Acta Botânica Brasílica, 2006 Temporal and spatial variation of Nitella furcata (Roxburgh ex Bruzelius) C. Agardh emend. R.D. Wood subsp. mucronata (A. Braun) R.D. Wood var. mucronata f. oligospira (A. Braun) R.D. Wood were studied at the Ninféias pond (23°38'18.9"S, 46°37'16.
Norma Catarina Bueno +1 more
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SEM study of compound oospore wall ornamentation of some members of Charales from Yugoslavia, Croatia and Slovenia [PDF]
Archives of Biological Sciences, 2002 The outermost layer of the oospore wall of the members of Chorales shows various ornamentation patterns, formed due to differential deposition of wall material.
Mandal D.K. +2 more
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Temporal dynamics of aquatic communities and implications for pond conservation [PDF]
, 2012 Conservation through the protection of particular habitats is predicated on the assumption that the conservation value of those habitats is stable. We test this assumption for ponds by investigating temporal variation in macroinvertebrate and macrophyte ...
Andrew Hull +39 more
core +1 more source
New records and noteworthy data of plants, algae and fungi in SE Europe and adjacent regions, 22 [PDF]
Comprehensive Plant BiologyThis paper presents new records and noteworthy data on the following taxa in SE Europe and adjacent regions: saprotrophic fungi Coronophora gregaria and Teunomyces cretensis, stoneworts Nitella flexilis and Nitellopsis obtusa, mosses Brachytheciastrum ...
Gordana Tomović +17 more
doaj +1 more source