• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 64
  • 55
  • 6
  • 3
  • 2
  • 2
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • Tagged with
  • 183
  • 34
  • 21
  • 20
  • 17
  • 16
  • 14
  • 14
  • 14
  • 13
  • 13
  • 12
  • 12
  • 11
  • 10
  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

An axenic culture of Opalina obtrigonoidea (Metcalf)

Oñate, Elba Mercedes Sandin, 1937- January 1964 (has links)
No description available.
2

Protozoan sequence in infusions and the relationship between the hydrogen-ion concentration and the number of species present

TSANG, Hing Wan 01 June 1935 (has links)
No description available.
3

Selection of food in Stentor caeruleus (Ehr.) ...

Schaeffer, Asa A. January 1909 (has links)
Thesis (Ph. D.)--Johns Hopkins University. / Biography. Published also as vol. VIII, no. 1 of The Journal of experimental zoölogy. Bibliography: p. 132.
4

The interactive effects of temperature and food concentration on growth responses of aquatic protists, with particular reference to the heterotrophic dinoflagellate Oxyrrhis marina

Kimmance, Susan Ann January 2001 (has links)
No description available.
5

Influence of the diet of Blattidae on some of their intestinal Protozoa ...

Armer, Joseph Marie, January 1944 (has links)
Thesis (Ph. D.)--Catholic University of America, 1944. / "Reprinted from the Journal of parasitology, June, 1944, vol. 30, no. 3." Bibliography: p. 142.
6

Growth of protozoa and isolation of their cytochromes C

Barker, Carla Kay, January 1968 (has links)
Thesis (M.S.)--University of Wisconsin--Madison, 1968. / eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.
7

Distribution and model studies on foraminifera living in Buttonwood Sound, Florida

Lynts, George Willard, January 1964 (has links)
Thesis (Ph. D.)--University of Wisconsin--Madison, 1964. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 94-97).
8

The effect of strontium chloride and ammonium chloride on the oxygen and carbon dioxide exchange of Paramecium caudatum

Hoover, Kenneth Bert. January 1941 (has links)
LD2668 .T4 1941 H62 / Master of Science
9

The effect of desiccated thyroid on the reproduction of Paramecium caudatum ;The effect of desiccated thyroid on the respiration of Paramecium caudatum

Moore, Robert Foster. January 1952 (has links)
Call number: LD2668 .T4 1952 M62 / Master of Science
10

The ecology of benthic ciliated protozoa

Finlay, Bland James January 1977 (has links)
This study deals with the ecology of ciliated protozoa in the benthos of a small (10 hectares), eutrophic loch (OS ref. 808 966). Regular sampling of the benthos and overlying water at three markedly different sites over a two-year period was complemented with laboratory experiments on individual ciliate species. In part 1 of the thesis, variation in the complete ciliate population (temporal and vertical distribution of numbers and biomass) is analysed by single and multiple regression on the other factors recorded (including redox potential, sulphide ion activity, pH, oxygen flux, nematodes, bacteria, chlorophyll a and phaeophytin, sediment density and organic carbon, temperature, daylength and various aspects of water chemistry). Seasonal cycles were recorded for ciliate number, biomass and pattern and extent of depth penetration. The most prominent seasonal characteristic was the accumulation of ciliates at the sediment surface during the summer (up to 83000 cm-2, > 99% being in the top 1 cm of sediment). This has been explained in terms of the summer increase in benthic productivity increasing the available food sources for ciliates at the sediment surface, and upwards migration of the redox potential discontinuity forcing the ciliate population into the oxidised microzone. In the second part, the distribution and abundance of individual species has been described. Species such as Cyclidium glaucoma and Aspidisca costata occurred on almost every sampling occasion. Large species such as Loxodes striatus, Spirostomum teres and Frontonia leucas were more frequent and abundant during the summer. Species with known or suspected tolerance of anoxia and reducing conditions, such as Caenomorpha spp., Mylestoma uncinatum and Epalxella spp., were more common in the sub-surface sediment. Although 91 species were identified during the whole sampling programme, the maximum number distinguished on any one occasion was 25. Computer-assisted association analyses identified groups of similar species and similar occasions. Species-groups composed predominantly of large ciliates were defined for each of the three sites. Occasions were sorted into seasonal groups, the species-groups composed of large ciliates accounting for most of the coincidence with the summer and autumn occasion-groups. The factors controlling seasonal variation are discussed. Part 3 is concerned with the energetics of the complete ciliate population and its constituent size classes. While estimates of production were high, (345 149 and 40 J cm-2 year-1 at the three sites) respiratory energy losses were relatively low (18, 11 and 4 J cm-2 year-1 at the three sites with ciliates accounting for a maximum of 3.5% of total benthic respiration). Seasonal variation was detected in population net production efficiencies (range 63 - 98%), the lower values being more common in the winter, The energetic efficiencies of the ciliate population are considered with reference to data in the literature for higher organisms. The contribution made by ciliates to energy flow through the benthos is discussed.

Page generated in 0.0205 seconds