Portal Home
Thumbnail Icon Science Keywords > BIOSPHERE



Refine by Category
 
Refine by Full Text

 

27 Titles Match Your Query
Showing 1 through 27 of 27
1. Antarctic Marine Metabolites: New Polyhydroxylated Steroidal Glycosides from the Starfish Odontaster validus [20-82_02_INACH]
Two new asterosaponins, validosides A and B, were isolated from the butanolic extract of the starfish Odontaster validus and their structures established as (24S)-24-O-[2,4-di-O-methyl-B-xylopyranosyl-(1-2)-a-arabinofuranosyl]-5a-chol-e ...


2. Cetacean records in Patagonian Channels, Drake Passage, Bransfield and Gerlache straits [08-93_01]
In the summers of 1994/95, 1995/96, 1996/97 and 1997/98, researchers visited the waters of Patagonian Channels, Drake Passage, Bransfield Strait and de Gerlache Strait looking for cetaceans. The observations ...


3. Harvesting of pinniped faeces for studies of diets, Cape Shirreff, Livingston Island, Antarctica [018-82_11]
The data consist in samples of male and female Antarctic fur seal faeces, collected for studying their diet. During the season 1998/99 the harvesting of Weddell seals' faeces were added.


4. Indirect measurement of the duration of female Antarctic fur seal feeding trips and attention to pups on Livingston Island, Antarctica [018-82_09]
The data consist of the duration of the feeding trips by female Antarctic fur seal, as well as of its land permanence, measured indirectly according to the presence or absence of the female next to ...


5. Lipid content in leaves of Deschampsia antarctica from maritime Antartica [148-92_02]
Deschampsia antarctica plants were collected in Robert Island, Antarctica, and frozen in liquid nitrogen. Polar lipids and the composition of fatty acids in phospholipids and galactolipids were analysed ...


6. Metabolic studies in Deschampsia antarctica [012-98_03]
Studies related to the content of non-structural sweeten in Desachampsia antarctica, have been made since 1992. It has been found that the plant accumulates high levels of saccharose and fructose. ...


7. Monitoring of beached solid residues on the coast of Cape Shirreff, Livington Island [018-94_01]
This data set contains information related to the collection of waste at the coast of Cape Shirreff, Livingston Island. The material collected corresponds only to the wastes generated off-shore as ...


8. Monitoring of environmental parameters [018-93_01]
The data set contains information on the main meteorological and micro-climatic variables of the Cape Shirreff area in Livingston Island. Three stations were installed in Daniel Beach, Paso Ancho ...


9. Observations of marine mammals during navigation to and from Cape Shirreff and of cetaceans in front of Cape Shirreff waters. [018-82_10]
The data consist of marine mammals (cetaceans and pinipeds) registries obtained during sightings during navigation to and from Cape Shirreff. Data also consist of observations of cetaceans in Cape ...


10. Periodic censuses of fur seal in focal beaches in Cape Shirreff, Livingston Island, Antarctica [018-82_02]
Periodic censuses (daily, every second day and every two days) of fur seal in focal beaches in cape Shirreff, Livingston Island, Antarctica in three beaches (Daniel, Copihue and LoberĂ­a, respectively), ...


11. Population Description of Deschampsia in Robert Island [012-98_02]
Data set consists of a statistical analysis (census count) of Deschampsia antarctica population on Robert Island in the South Shetland Islands.


12. Preliminary data on the accumulation of usnic acid related to ozono depletion in two lichens [003-94_01]
The absorbing properties of UV radiation of lichen phenols agree with their photoprotector capacity determined by in vivo and in vitro methods. The photostability that characterizes these compounds ...


13. Quantitative variations of phenolic compounds related to thallus age in Umbilicaria antarctica in Antarctica [110-88_02]
Densitometric analysis (HPTLC) was used to determine the concentrations of phenolic metabolites in thalli of different ages in Umbilicaria antarctica Frey et Lamb. Usnic acid and atranorin concentrations ...


14. Registry of the growth of the Antarctic fur seal pups, Arctocephalus gazella, in Cape Shirreff, Livingston Island, Antarctica [018-82_04]
The data show the weighing of pups following the standard method of CCAMLR (Commission for the Conservation of Antarctic Marine Living Resources) C2, version B. 50 males and 50 females are weight ...


15. Registry of the growth of the Antarctic fur seal pups, Arctocephalus gazella, on Daniel Beach, Cape Shirreff, Livingston Island, Antarctica [018-82_05]
The data is related to periodic weighing (between 5 and 10 days) of pups of both sexes throughout the season. The data includes the corporal measures of the puppies (total length and pectoral width), ...


16. Response of Deschampsia to environmental conditions during the Antarctic summer [012-98_04]
The data is derived from a study of the reaction of Deschampsia to environmental conditions during the Antarctic summer and consists of biochemical analyses of leaves, analyses by HPLC of lipids, ...


17. Santiagoside, the first Asterosaponin from an Antarctic Starfish (Neosmilaster georgianus). [20-82_01]
A new asterosaponin, named santiagoside, has been isolated from the Antarctic starfish Neosmilaster georgianus and, its structure elucidated on the basic of extensive spectroscopic experiments and ...


18. Size structure of tussocks of a population of Deschampsia antarctica Desv. in Robert Island, Maritime Antarctica [148-92_01]
The distribution and size structure of tussocks of the population of Deschampsia antarctica Desv. was studied in the Coppermine Peninsula, Robert Island. Different study sites showed predominance ...


19. Spatial distribution of penguin nests in reproductive colonies [040-87_01]
The data set contains information about the ecology of the pygoscelidos penguins (Papua, adelie and antarctic). These data consist of a census of nesting groups, chick weight gain, and chick mortality ...


20. Stratified and Inter-annual analysis of zooplankton of the English Strait, Chile Bay (En Espanol: Analisis de zooplancton estratificado e inter-anual del Estrecho Ingles, Bahia Chile) [154-93_02]
During summer to the beginning of autumn, samples of zooplankton were gathered between water depths 0 and 200 meters weekly from a fixed station in the English Strait, Chile Bay. Samples were collected ...


21. Tagging of fur seal pups, Arctocephalus gazella, in Cape Shirreff, Livingston Island [018-82_06]
The data is related to tagging of fur seal pups of both beach sexes from different beaches on Cape Shirreff, with the purpose of studying the degrees of philopatry, migration and pursuits of the colony ...


22. Temporal variation in usnic acid concentration in Usnea aurantiaco-atra in Antarctica [110-88_01]
In Usnea aurantiaco-atra, growing in the Antarctica, a monthly variation in the usnic acid content, in individual thalli, was studied by means of scanning densitometry (HPTLC). The higher accumulation ...


23. The occurrence of gold in Usnea auratiaco-atra [110-88_03]
In Usnea aurantiaco-atra (Jacq)- Bory, a lichen species collected in the Antarctica, the gold content was determined by the cupellation methods, 317 ppb and 1089 ppb dry weight were found in the lichen ...


24. Total censuses of fur seal Arctocephalus gazella, in the SEIC No. 32 [018-82_01]
There are population data of Antarctic fur seal from reproductive season 1982-83 up the present. The first censuses correspond to counts without separation in etarial category, this separation started ...


25. UV Radiation at Robert Island, South Shetland, Antarctica [003-94_02]
Solar ultraviolet radiation measurements by means of chemical actinometry and spectroradiometric instrumental were carried out at the Risopatron base at Robert Island, Antarctic, during January 1996. ...


26. Weekly censuses of birds and marine mammals, Greenwich Island, Antarctica (En Espanol: Censos semanales de aves y mamiferos marinos, Isla Greenwich, Antartica) [154-93_03]
From January of 1994 and to date, weekly censuses of birds and marine mammals have been taken in the coastal sector of Chile Bay, between the Caleton Iquique and the English Strait located near Greenwich ...


27. Zonation, size, population density and distribution of sexes in Nacella concinna, Chile Bay (Zonacion, estructura de talla, densidad poblacional y proporcion de sexo de Nacella concinna, en Bahia Chile) [154-93_04]
For this study, determination of stature, distribution of the sexes, zonation and relative abundance of the population were determined for the Antarctic limpet Nacella concinna in the intertidal ...


Showing 1 through 27 of 27

Link to NASA website
Responsible NASA Official:   Dr. Stephen Wharton
Webmaster:   Monica Lyles   ·  Contact GCMD User Support for assistance