• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 79
  • 12
  • 9
  • 5
  • 5
  • 5
  • 5
  • 5
  • 5
  • 4
  • 3
  • 2
  • 1
  • 1
  • 1
  • Tagged with
  • 138
  • 26
  • 24
  • 18
  • 17
  • 17
  • 16
  • 10
  • 9
  • 8
  • 8
  • 8
  • 8
  • 7
  • 7
  • 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.
21

Jehličnany ve výuce přírodopisu a biologie / Conifers in the education of the biology

Podroužková, Vanda January 2011 (has links)
3 Abstract This thesis covers conifers (Pinopsida) and their use in teaching natural science in primary schools and biology in secondary schools. The aim is to analyze the problems of conifers (Pinopsida) at FEP (Framework Education Programme) for basic education and in selected textbooks, to determine the level of teaching conifers (Pinopsida) in primary schools and secondary schools in the Benešov region and propose a project with the theme of conifers (Pinopsida) for primary and secondary schools, with partial verification in the classroom. The theoretical part is concerned with conifers (Pinopsida) from a biological point of view. Characterize a group of conifers (Pinopsida), it's representatives in the Czech Republic and also deal with the ecology of conifers (Pinopsida). In the research part, using text and tables I mention results of analysis of FEP for basic education and analysis of textbooks. Later in the form of tables and graphs I mention the results of research on teaching conifers (Pinopsida) in primary and secondary schools in the Benešov region. Research was conducted using the questionnaire. Finally, I present the proposed project: The scent of resin partially verified in primary school. This work is intended for all who are interested in the conifers (Pinopsida) from the didactic point of view.
22

Continental and regional distribution and abundance patterns of boreal cardueline finches : influences of conifer seed availability /

Wren, L. Sarah, January 2001 (has links)
Thesis (M.Sc.)--Memorial University of Newfoundland, 2001. / Includes bibliographical references.
23

Juvenile wood formation in relation to crown size in Corsican pine

Amarasekera, Hiran S. January 1990 (has links)
No description available.
24

Peridermium pini (Pers.) Lév.-Axenic culture and infection of pine callus tissue cultures and young seedlings

Pei, Ming Hao January 1989 (has links)
Axenic cultures of Peridermium pini have been established on modified Shenk &'38 Hilderbrandt's and Harvey &'38 Grasham's media from naturally infected cortex tissues and aeciospore-infected calluses of P. sylvestris and from aeciospores collected from NE Scotland and East Anglia. The cultures occasionally produced immature smooth-surfaced, binucleate spores. Actively growing cultures infected P. sylvestris calluses but not seedlings or trees. In the experiment of fungal nutrition, (NH4)2SO4 appeared essential, sucrose, D-glucose, raffinose and D-sorbitol supported good growth while D-xylose, cellobinose and L-arabinose did not. Opt. medium pH proved to be 5.0-6.0. Axenic cultures were also obtained from 30-40&'37 of single sporelings of some East Anglia spore sources but not from NE Scotland sporelings. When inoculated at a high density, however, all spore sources from both East Anglia and NE Scotland readily formed colonies. Colonies from East Anglia spores mostly appeared smooth at the surface and distinct around margin while those from NE Scotland sources had fluffy surface and irregularly extended periphery. Rapidly expanding hyphal layers developed from both of the colony forms 3 months after inoculation. Callus tissue cultures of P. sylvestris, P. nigra var. maritima and P. mugo vars mughus, rostrata and pumilio were infected by inoculation with aeciospores from NE Scotland. Infections were characterized by formation of aerial hyphae on the callus surface and intercellular hyphae and typical haustoria in the callus tissue. Hyphae from some of the infected calluses penetrated the medium. Seedlings of the pines as above were infected at their cotyledon stage by inoculation with NE Scotland spores. Infections resulted in swelling, death of the seedlings and formation of spermogonia after a year and aecia after two years. Infections of young seedlings of 7 seed sources of P. sylvestris and the UK were examined 6 weeks after inoculation. Discolouration and necrosis of cotyledons were not always related to stem infection.
25

The influence of soil compaction on early conifer growth in the southern Washington Cascades /

Robbins, Richard William. January 1983 (has links)
Thesis (M.S.)--Oregon State University, 1984. / Typescript (photocopy). Includes bibliographical references (leaves 84-91). Also available on the World Wide Web.
26

Optical properties of phytoelements in conifers

Harron, John. January 2000 (has links)
Thesis (M. Sc.)--York University, 2000. Graduate Programme in Earth and Space Science. / Typescript. Includes bibliographical references (leaves 155-159). Also available on the Internet. MODE OF ACCESS via web browser by entering the following URL: http://wwwlib.umi.com/cr/yorku/fullcit?pMQ67753.
27

The relationship between growth of Picea Glauca (Moench) Voss, Picea Mariana (Mill.) B.S.P. and summer temperatures in sub-arctic Canada.

Mortenson, Erik. January 1965 (has links)
The present investigation is a study of the relationship between growth of Picea glauca. (Moench) Voss, Picea mariana (Mill.) B.S.P. and climatic influences. Special emphasis has been placed on a study of the relationship between summer temperatures and yearly and daily growth of the terminal shoot. The investigation was carried out at Knob Lake (also called Schefferville) in the center of the Labrador Peninsula during the summers of 1958 and 1959. [...]
28

The effects of afforestation on the degreee of podzolisation in Glentress Forest, Scotland

Cuthbert, Katherine Margaret January 1989 (has links)
No description available.
29

Relationships of tree growth to nitrogen and water availability in a sheep-tree-pasture system in Douglas County, Oregon : field case study and shadehouse simulation /

DeMeo, Thomas. January 1987 (has links)
Thesis (M.S.)--Oregon State University, 1988. / Typescript (photocopy). Includes bibliographical references (leaves 87-94). Also available on the World Wide Web.
30

The importance of maintenance respiration by living cells in the sapwood of subalpine conifers /

Ryan, Michael G. January 1988 (has links)
Thesis (Ph. D.)--Oregon State University, 1989. / Typescript (photocopy). Includes bibliographical references. Also available on the World Wide Web.

Page generated in 0.0503 seconds