Spectral Characteristics of Greenland Lichens
نویسندگان
چکیده
منابع مشابه
Lichens
What are lichens? The term lichen refers to a symbiotic association between a filamentous fungus, the ‘mycobiont’, and at least one photosynthetic organism, the ‘photobiont’, consisting of a micro alga, a cyanobacterium, or both (Figure 1). Although the symbiotic nature of lichens was first revealed in 1867, the development of a lichen thallus is often so integrated (Figure 1D) that they have b...
متن کاملPolysaccharides from lichens: structural characteristics and biological activity.
Lichens have been used for medicinal purposes throughout the ages, and beneficial claims have to some extent been correlated with their polysaccharide content. Of 13,500 lichen species growing worldwide, less than 100 species have been investigated for polysaccharide content. Lichen polysaccharides are mainly of three different structural types: beta-glucans, alpha-glucans, and galactomannans. ...
متن کاملCharacteristics and dynamics of two major Greenland glacial fjords
The circulation regimes of two major outlet glacial fjords in southeastern Greenland, Sermilik Fjord (SF) and Kangerdlugssuaq Fjord (KF), are investigated using data collected in summer 2009. The two fjords show similar flow patterns, with a time-dependent, vertically sheared flow structure dominating over the background estuarine flow driven by buoyancy input. We show that this time-dependent ...
متن کاملQuantifying spectral characteristics of fricatives
In a search for spectral parameters that can be used to distinguish and to model fricatives, spectral moments, dynamic amplitude, and slope above maximum amplitude were computed for a fricative corpus including sustained fricatives at di erent e ort levels, and fricatives in vowel context. Moments varied signi cantly by frequency range used in computation. M3 appeared to vary the least across f...
متن کاملSpectral characteristics of pitot noise
For experimental studies of transition from laminar to turbulent boundary layer flow it is important to know the ambient noise spectrum in the facility. In supersonic wind tunnels this is often assessed by measuring pitot pressure noise. A discussion of such measurements is given, e. g., by Salyer et al. [1], see also Parziale et al. [2]. The question arises as to whether the noise measured by ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Géographie physique et Quaternaire
سال: 2006
ISSN: 1492-143X,0705-7199
DOI: 10.7202/013737ar