Results 201 to 210 of about 63,748 (260)

The superposition method for the reconstruction of food webs

Methods in Ecology and Evolution, EarlyView.
Abstract Understanding trophic positions is essential for analysing complex food webs. While calculating these positions can be straightforward when feeding relationships and their proportions are known, determining diet coefficients traditionally requires substantial time and effort.
Ettore Barbieri, Naoto F. Ishikawa
wiley   +1 more source

Sperm Head–Tail Coupling Apparatus Diversity and Common Themes Among Species

Andrology, EarlyView.
ABSTRACT Background A stable connection between the sperm head (containing the nucleus and acrosome) and tail (containing the axoneme, mitochondrial sheath, and periaxonemal structures) is critical for fertility. This connection is mediated by a series of nuclear, cytoplasmic, and centriole components that make up the head–tail coupling apparatus (HTCA)
Danielle B. Buglak, Brian J. Galletta, Nasser M. Rusan   +2 more
wiley   +1 more source

Response of Remote Tropical West Pacific Islands to Climate Variability: A Multiproxy Record From T‐Lake, Palau, Spanning the Early Holocene to Present

Archaeometry, EarlyView.
ABSTRACT Lake sediments are natural archives of past environmental dynamics and how these systems have responded to past climate variability. Sediment geochemistry, governed by local geology and climate processes, is unique to each lake‐catchment and geochemical proxies must be validated for each study site.
Jalene Nalbant, Larissa Schneider, Jessica L. Blois, Matthew Wolhowe, Julian P. Sachs, Simon G. Haberle, Geoffrey Clark   +6 more
wiley   +1 more source

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Red algae and their use in papermaking

Bioresource Technology, 2010
Gelidialian red algae, that contain rhizoidal filaments, except the family Gelidiellaceae were processed to make bleached pulps, which can be used as raw materials for papermaking. Red algae consist of rhizoidal filaments, cortical cells usually reddish in color, and medullary cells filled with mucilaginous carbohydrates.
Youn-Woo Lee
exaly   +3 more sources

Are red algae plants?

Botanical Journal of the Linnean Society, 1995
For 200 years prior to the 1938 publication of H. F. Copeland, all authorities (with one exception) classified red algae (Rhodophyta) within Kingdom Plantae or its equivalent. Copeland's reclassification of red algae within Kingdom Protista or Protoctista drew from an alternative tradition, dating to Cohn in 1867, in which red algae were viewed as the ...
Ragan, MA, Gutell, RR
openaire   +4 more sources

Bromophenols from Red Algae

Science, 1967
3,5-Dibromo- p -hydroxybenzyl alcohol is reported as a natural constituent of Odonthalia dentata and Rhodomela confervoides . The amounts isolated, based on the fresh weight of the tissue, were 0.024 and 0.003 percent, respectively.
J S, Craigie, D E, Gruenig
openaire   +2 more sources

Polysaccharides of the red algae

2011
Red algae (Rhodophyta) are known as the source of unique sulfated galactans, such as agar, agarose, and carrageenans. The wide practical uses of these polysaccharides are based on their ability to form strong gels in aqueous solutions. Gelling polysaccharides usually have molecules built up of repeating disaccharide units with a regular distribution of
openaire   +2 more sources

Algae in red

Nature, 1992
Dunaliella: Physiology, Biochemistry and Biotechnology. Edited by M. Avron and A. Ben-Amotz. CRC Press: 1992. Pp. 240. a£109, $149.95.
openaire   +1 more source

Red algae

Current Biology
Borg introduces the red algae - the largest living group of seaweeds.
openaire   +3 more sources

Carotenoids in red algae

Phytochemistry, 1976
Abstract The carotenoid composition of the following 8 species of red algae has been studied quantitatively and qualitatively: Bangia fuscopurpurea, Nemalion helminthoides, Bonnemaisonia hamifera (tetrasporophyte), Gigartina stellata, Rhodymenia palmata, Ceramium rubrum, Polysiphonia brodiaei, and Polysiphonia urceolata.
Terje Bjørnland, Martha Aguilar-Martinez   +1 more
openaire   +1 more source