Search Results - (Author, Cooperation:E. E. Davis)

2012-01-28

American Association for the Advancement of Science (AAAS)

0036-8075

1095-9203

Biology

Chemistry and Pharmacology

Computer Science

Medicine

Natural Sciences in General

Physics

Amino Acid Sequence ; Animals ; Cell Line ; Cerebellar Diseases/*genetics/metabolism/pathology ; Cilia/metabolism/*ultrastructure ; Conserved Sequence ; DNA, Intergenic ; *Evolution, Molecular ; Eye Abnormalities/*genetics/metabolism/pathology ; Gene Expression Profiling ; *Gene Expression Regulation ; Genetic Heterogeneity ; *Genetic Loci ; Humans ; Kidney Diseases, Cystic/*genetics/metabolism/pathology ; Membrane Proteins/chemistry/*genetics/metabolism ; Molecular Sequence Data ; Multigene Family ; Mutation ; Mutation, Missense ; Phenotype ; Protein Transport ; *Regulatory Sequences, Nucleic Acid ; Retina/abnormalities/metabolism/pathology ; Transport Vesicles/metabolism/ultrastructure

2015-07-01

Nature Publishing Group (NPG)

0028-0836

1476-4687

Biology

Chemistry and Pharmacology

Medicine

Natural Sciences in General

Physics

Adaptor Proteins, Signal Transducing/genetics ; Alleles ; Animals ; Disease/*genetics ; Evolution, Molecular ; Genome, Human/genetics ; *Genomics ; Humans ; Immediate-Early Proteins/genetics ; Microcephaly/genetics ; Mutation, Missense/*genetics ; Phenotype ; Proteins/genetics ; Sequence Alignment ; Suppression, Genetic/*genetics ; Tumor Suppressor Proteins/genetics

book

2006

Erfahrungswissen ; Schulleitung ; Führungskompetenz

English

Literaturangaben

book

2010

Schule ; Schulleitung ; Finanzierung ; USA

English

Literaturangaben

1365-246X

Blackwell Publishing Journal Backfiles 1879-2005

Geosciences

Multipenetration heat flow measurements have been made at four sites in deep basins of the west-central Pacific Ocean: the West Mariana Basin, Central Mariana Basin, Nauru Basin and Central Pacific Basin. The final heat flows are, respectively, 46.6 /pm 0.5, 49.4 /pm 0.2, 44.2 /pm 0.9 and 49.5 /pm 1.1 mW m-2. Each site was surveyed by single-channel seismic reflection profiling, and provided a gravity core. The instrument measured thermal conductivity in situ over the entire depth intervals used for determination of the gradients, and the reduction scheme iterated conductivity and heat-capacity changes into the fitting procedure, both of entry frictional decays and of conductivity heat pulse decays. The absolute accuracy of the instrument should approach 2 per cent and the first site would make a good intercalibration standard for heat flow measurement. The heat flow variation between the sites is real, and there is also a significant variation in the isostatically reduced depths of the sites. There is no age progression of either depth or heat flow, and, when five other good multidata points are included, the relationship between depth and heat flow conforms to that expected from simple cooling models only in an average sense for the whole group. The most plausible explanation for the variations is that heat flow and thermal elevation are dependent on different levels of deep lithosphere reheating at different times between 70 and 120 Myr ago. It is suggested that additional topographic variation is caused by the different accumulations of sediment and lava flows at each site, and to errors in the isostatically reduced depths due to incomplete knowledge of the stratigraphy down to the crust-mantle interface. These explanations of the topographic variation could be tested by seismic refraction measurements.

Electronic Resource

1573-0581

Heat flow ; hydrogeology ; instrumentation

Springer Online Journal Archives 1860-2000

Geosciences

Physics

Abstract A new probe has been constructed for making temperature measurements 1.1 m ahead of the bit in Ocean Drilling Program (ODP) boreholes. Temperatures are recorded at positions 1 and 11 cm above the tip of the probe. The combination of the dual temperature records and accelerometer data provides valuable information about disturbances that may affect the quality of measurements. Long battery life, and memory access via an external communications port, allow service-free operation for the full duration of typical drilling legs. Temperature resolution varies over the 110 K measurement range, from nominally 1 mK from -5 to 20 °C, to about 10 mK at 105 °C. The small (8 mm) diameter of the probe tip allows rapid thermal equilibration after penetration. The shallow (2.5°), continuous taper of the lower part of the probe serves to reduce the tendency of the formation to be cracked when the tool is pushed into the formation. It is sufficiently robust, however, to survive penetration into highly consolidated sediment and occasional contact with igneous rock. The tool was used for a total of 44 bottom-hole temperature measurements between 38 and 573 meters below seafloor (mbsf) during Leg 168, as well as for several logging runs in open holes. We anticipate adding a port in the tip to permit measurement of formation fluid pressure, and to enhance the utility of the tool for logging temperature profiles in open holes.

Electronic Resource

1573-0581

Springer Online Journal Archives 1860-2000

Geosciences

Physics

Abstract The design and use of a marine heat probe with capability for measuring thermal conductivity insitu with high accuracy, and providing digital acoustic transmission of data to the ship, is described. The instrument employs the ‘violin bow’ strength member and parallel sensor string configuration suggested by C. R. B. Lister. Several hundred measurements have been made in the deep ocean on multipenetration or ‘pogostick’ profiles using a 3 m probe and in deep inlets of western Canada using a 7 m probe. The insitu thermal conductivity technique using a calibrated heat pulse has been studied in detail through laboratory calibration of the probe in materials of known conductivity, through numerical models, and through comparison of insitu measurements with needle probe measurements on sediment cores taken from the same sites. The insitu technique permits a conductivity accuracy of better than ±5% with a recording time of 7 minutes following 7 minutes in the bottom to establish the geothermal gradient. The pulse heating is also more energy efficient than the conventional continuous heating technique.

Electronic Resource

1573-0832

Springer Online Journal Archives 1860-2000

Biology

Medicine

Abstract More than 300 reference strains representing 60 species and varieties ofFusarium cultures named according to different taxonomic systems are currently maintained at the American Type Culture Collection (ATCC). They have been preserved by freeze-drying and by freezing and subsequent storage in liquid nitrogen (−196°C) to insure their viability without contamination, variation, mutation, or deterioration. The materials and procedures used at the ATCC for the acquisition, accessioning, cataloguing, preservation and distribution are described. Longevity storage data for the strains available for distribution are presented and discussed.

Electronic Resource

1476-4687

Nature Archives 1869 - 2009

Biology

Chemistry and Pharmacology

Medicine

Natural Sciences in General

Physics

[Auszug] Hydrothermal circulation within the sea floor, through lithosphere older than one million years (Myr), is responsible for 30% of the energy released from plate cooling, and for 70% of the global heat flow anomaly (the difference between observed thermal output and that predicted by conductive ...

Electronic Resource

1420-9071

Springer Online Journal Archives 1860-2000

Biology

Medicine

Résumé Deux corrections sont faites dans la classification des chémorécépteurs antennaires de la femelle du moustiqueAedes aegypti. Le sensillum «A4» est classi comme sensillum basiconicum (A3), et l'«A3» deLacher 11, etDavis etRebert 10 comme sensillum trichodeum (type A2). Les résultats électrophysiologiques antérieurs ne sont pas contestés.

Electronic Resource