21,040 research outputs found
Replication Data for: Tanycytes from a bird’s eye view: gene expression profiling of the tanycytic region under different seasonal states in the Svalbard ptarmigan
No full textTanycytes around the third ventricle and the adjacent mediobasal hypothalamus are crucial components to trigger photoperiodic responses in breeding and metabolism. In mammals, tanycytes are known to regulate hypothalamic thyroid hormone conversion, a process which is linked to seasonal reproduction. They are further involved in retinoic acid signalling, neurogenesis, and nutritional gatekeeping, all of which have been linked to the photoperiodic regulation of metabolism. The region is neuroanatomically conserved between mammals and birds but, apart from the hypothalamic thyroid hormone conversion, little is known about the functional roles of tanycytes in birds. We, hence, aimed to give a comprehensive characterisation of gene expressions in avian tanycytes and surrounding cells under different photoperiodic reproductive and metabolic states.
For this purpose, we used the Svalbard ptarmigan (Lagopus muta hyperborea), a high-Arctic bird species which shows pronounced seasonal rhythms in breeding and body mass. We applied a simple photoperiodic extension protocol to short-day adapted birds to trigger a long-day response which is marked by initiation of breeding and loss in body mass. After several weeks under a long photoperiod, the innate development of photorefractoriness led to a reversal to the short-day phenotype marked by the termination of breeding and gain in body mass. We sampled birds at different seasonal states and used laser-capturing and RNAseq to correlate the seasonal phenotype with the gene expressions in tanycytes and the surrounding area.
The here contained dataset includes behavioural data, gene expression data (raw and cpm) and results from statistical analyses and GO enrichment analyses. Furthermore the EdgeR RNA seq script is attached
Report on Meteorological Research March 1, 1935 (m-1)
No full textThe object of the report was to elucidate in detail the various features of the research program in meteorology being carried on at the Daniel Guggenheim Airship Institute in Akron, Ohio. Mr. L. J. Fangman, of the U.S. Weather Bureau, was collaborating with the author in carrying out work such as a study of autographic records of the various meteorological elements during frontal passages with a view to the possible prediction of the intensity of the accompanying disturbance as it may affect the operation of aircraft and a study of atmospheric gustiness with a view to finding the dependence between frequency end amplitude of velocity fluctuations and the vertical temperature and velocity gradients
Replication Data for: The reindeer circadian clock is rhythmic and temperature-compensated but shows evidence of weak coupling between the secondary and core molecular clock loops
No full textThe purpose of the publication was to investigate the molecular circadian clock in an Arctic context by contrasting reindeer with mouse fibroblast cell cultures. Cell cultures were transduced with promoter luciferase reporters for the clock genes Bmal1 and Per2. The data acquired from the promoter reporter measurements were to some extent confirmed by mRNA abundance measurements done by qPCR.
The data set published here contains the promoter reporter data, measured as bioluminescence in a PMT (photon multiplier tube) and qPCR data
Replication Data for: Body temperature and activity rhythms under different photoperiods in Svalbard ptarmigan (Lagopus muta hyperborea)
No full textThe following data was used to generate figures and analysis of the manuscript: "Body temperature and activity rhythms under different photoperiods in Svalbard ptarmigan (Lagopus muta hyperborea)". This includes data of core body temperature (measured with iButtons in degrees Celsius/ hour), raw activity data (measured in counts/ minute) and the R-script for the mixed model analysis for the amplitudes between groups. In addition we provide an overview over the experimental animals
Replication Data for: Evidence for circadian-based photoperiodic timekeeping in the Svalbard ptarmigan, the northernmost resident bird.
No full textThe following data was used to generate the figures of the manuscript: "Adaptive value of circadian rhythms in High Arctic Svalbard ptarmigan". This includes data from in situ hybridisation (measured in optical density), raw activity data (measured in counts per minute), body mass, food intake and plasma testosterone levels. In addition we provide an overview over the experimental animals, the statistical analysis and the riboprobe sequences used for the in situ hybridisation
(Fourth) Report on Meteorological Activities at the DGAI (8-1-36)(Weather Bureau Copy)
No full textThis report is on the investigations of frontal phenomena at the Daniel Guggenheim Airship Institute in Akron, Ohio from January 1, 1935 through August 1, 1936. The investigation was carried out with the cooperation of the U.S. Bureau of Aeronautics, the U.S. Weather Bureau, the California Institute of Technology, and the Guggenheim Airship Institute. Mr. R.C. Robinson of the Weather Bureau cooperated with the author in carrying out the investigation. The object of the investigation was to determine the intensity of the atmospheric disturbances (i.e. rapidity of wind shift and gustiness) accompanying the passage of cold fronts, along with a study of the characteristics of the air masses involved and other features which might affect the intensity of the disturbance. The report treated thirty cold fronts which passed the station during 1935 to 1936
Archives and Images as Repositories of Time, Language, and Forms from the Past: A Conversation with Daniel Eisenberg
No full textsj-csv-1-jbr-10.1177_07487304231190156 – for Ambient Temperature Effects on the Spring and Autumn Somatic Growth Trajectory Show Plasticity in the Photoneuroendocrine Response Pathway in the Tundra Vole
No full textsj-csv-1-jbr-10.1177_07487304231190156 for Ambient Temperature Effects on the Spring and Autumn Somatic Growth Trajectory Show Plasticity in the Photoneuroendocrine Response Pathway in the Tundra Vole by Mattis Jayme van Dalum, Laura van Rosmalen, Daniel Appenroth, Fernando Cazarez Marquez, Renzo T. M. Roodenrijs, Lauren de Wit, Roelof A. Hut and David G. Hazlerigg in Journal of Biological Rhythms</p
sj-docx-2-jbr-10.1177_07487304231190156 – Supplemental material for Ambient Temperature Effects on the Spring and Autumn Somatic Growth Trajectory Show Plasticity in the Photoneuroendocrine Response Pathway in the Tundra Vole
No full textSupplemental material, sj-docx-2-jbr-10.1177_07487304231190156 for Ambient Temperature Effects on the Spring and Autumn Somatic Growth Trajectory Show Plasticity in the Photoneuroendocrine Response Pathway in the Tundra Vole by Mattis Jayme van Dalum, Laura van Rosmalen, Daniel Appenroth, Fernando Cazarez Marquez, Renzo T. M. Roodenrijs, Lauren de Wit, Roelof A. Hut and David G. Hazlerigg in Journal of Biological Rhythms</p
Daniel Akech
No full textabstract: Daniel was a little boy when the war came to his village. He witnessed people being shot and running for shelter. There was no food or water so he drank urine and ate tree leaves.
“Lost Boys Found” is an ongoing, interdisciplinary project that is collecting, recording and archiving the oral histories of the Lost Boys/Girls of Sudan. The collection is a work-in-progress, seeking to record the oral history of as many Lost Boys/Girls as are willing, and will be used in a future book.Age: 24Region: Upper NileThis picture and bio was donated to the "Lost Boys Found" oral history project from The Arizona Lost Boys Cente
- …
