Sökning: "lichens"

Visar resultat 1 - 5 av 23 avhandlingar innehållade ordet lichens.

  1. 1. Anatomy and taxonomy of cetrarioid lichens

    Detta är en avhandling från Systematic Botany

    Författare :Arne Thell; Lunds universitet.; Lund University.; [1996]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; chemotaxonomy. Physiology of nonvascular plants; taxonomi; phytogeography; morphology; taxonomy; Systematic botany; taxonomy; pycnoconidia; ascus structures; anatomy; Systematisk botanik; cetrarioid lichens; Ascomycotina; Parmeliaceae; morfologi; kemotaxonomi. Växters fysiologi inte kärlväxter .;

    Sammanfattning : The anatomy of the cetrarioid lichens (Parmeliaceae) has been studied, and the taxonomy revised. Special attention has been paid to reproductive structures, in particular the asci and pycnoconidia. Two types of asci are recognized. The Cetraria type is narrowly clavate, bears an amyloid ring structure in the tholus, and has a small axial body. LÄS MER

  3. 2. Chemical studies on lichens

    Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis

    Författare :Johan Santesson; Uppsala universitet.; [1969]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : .... LÄS MER

  4. 3. The Nostoc Symbiont of Lichens : Diversity, Specificity and Cellular Modifications

    Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis

    Författare :Per Paulsrud; Uppsala universitet.; [2001]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Developmental biology; Utvecklingsbiologi; Physiological Botany; fysiologisk botanik;

    Sammanfattning : Cyanobacteria belonging to the genus Nostoc have the capacity to form symbiotic associations with a wide range of organisms. Diversity, specificity and cellular modifications of the symbiosis between Nostoc and fungi in the formation of lichens were investigated in this thesis. LÄS MER

  5. 4. Natural products from Bolivian plants

    Detta är en avhandling från Department of Organic Chemistry

    Författare :José Vila; Lunds universitet.; Lund University.; [2006]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Organic chemistry; Organisk kemi; lichens; Secondary metabolites; Bolivian plants;

    Sammanfattning : Bolivia has the most varied ecology in South America - the Amazonas rainforests, the dry forests of the Chaco, the mist forests, the punas and high Andean vegetation. Some general studies have been carried out on useful plants; traditional medicine has been practiced in parts of region for thousands of years, recognized and accepted for treatment of various diseases. LÄS MER

  7. 5. Biological growth on mineral façades

    Detta är en avhandling från Div of Building Materials LTH, Lund university

    Författare :Sanne Johansson; Lunds universitet.; Lund University.; [2006]
    Nyckelord :TEKNIKVETENSKAP; TECHNOLOGY; mortar; moisture transport; mosses; biodeterioration; lichens; moulds; mineral facades; building physics; thin rendering on thermal insulation; heat transfer; biological growth; algae; heat capacity;

    Sammanfattning : During the last years there has been reported considerable and rapid contamination on newly built rendered façades in Sweden due to biological growth. The problem is believed to occur mostly on façades of render applied on thermal insulation, but apart from this it is difficult to find clear relationships indication which façades might be infected. LÄS MER