نتایج جستجو برای: centrifuge experiments

تعداد نتایج: 491468  

Journal: :Journal of clinical microbiology 1978
G L Dorn K Smith

A single-tube blood culture device designed for centrifugation in a tabletop centrifuge is described. Reconstruction experiments using 21 different organisms and human donor blood indicate that excellent recovery can be obtained by centrifugation for 30 min at 3,000 X g.

Journal: :Minerals 2021

Decanter centrifuges are frequently used for thickening, dewatering, classification, or degritting in the mining industry and various other sectors. Their use an industrial process chain requires a sufficiently accurate prediction of product machine behaviour. For this purpose, experiments on smaller pilot-scale carried out scale-up decanter centrifuge, which is usually major challenge. Predict...

Journal: :The New phytologist 2015
Uwe G Hacke Martin D Venturas Evan D MacKinnon Anna L Jacobsen John S Sperry R Brandon Pratt

The standard centrifuge method has been frequently used to measure vulnerability to xylem cavitation. This method has recently been questioned. It was hypothesized that open vessels lead to exponential vulnerability curves, which were thought to be indicative of measurement artifact. We tested this hypothesis in stems of olive (Olea europea) because its long vessels were recently claimed to pro...

Journal: :CoRR 2017
Ravi Teja Nallapu Saumil Shah Erik Asphaug Jekan Thangavelautham

Exploration of asteroids and small-bodies can provide valuable insight into the origins of the solar system, into the origins of Earth and the origins of the building blocks of life. However, the low-gravity and unknown surface conditions of asteroids presents a daunting challenge for surface exploration, manipulation and for resource processing. This has resulted in the loss of several landers...

2009
Abraham J Fetterman Nathaniel J Fisch

A method for driving rotation and a countercurrent flow in a fully ionized plasma centrifuge is described. The rotation is produced by radiofrequency waves near the cyclotron resonance. The wave energy is transferred into potential energy in a manner similar to the α channeling effect. The countercurrent flow may also be driven by radiofrequency waves. By driving both the rotation and the flow ...

Journal: :Bioinformatics 2005
Florence Armand Philipp Bucher C. Victor Jongeneel Edward E. Farmer

UNLABELLED Centrifuge is a user-friendly system to simultaneously access Arabidopsis gene annotations and intra- and inter-organism sequence comparison data. The tool allows rapid retrieval of user-selected data for each annotated Arabidopsis gene providing, in any combination, data on the following features: predicted protein properties such as mass, pI, cellular location and transmembrane dom...

Journal: :Journal of bacteriology 1956
O B WEEKS S M BECK

The removal of bacterial populations from large volumes of liquid culture media may be accomplished readily using a centrifuge, but the usual efficient continuous-feed type of centrifuge is often large and expensive. In this laboratory, during the past 2 years, bacterial cells have been removed from liquid culture with considerable success, using a small, inexpensive, continuously fed centrifug...

2012
Pradipta Chakrabortty Radu Popescu

Soil liquefaction is a major cause of seismic damage in cohessionless soil during earthquakes. From past numerical and experimental research it has been observed that more excess pore water pressure (EPWP) is generated during earthquakes in a heterogeneous soil deposit than in the corresponding homogeneous soil with relative density equal to the average relative density of the heterogeneous soi...

2012
W. F. Morales J. Laue A. Zweidler S. M. Springman

Structural analysis of new devices to be used in centrifuge facilities can be a challenging task. Initial calculations, based on simple basic static principles, are usually used. However, as devices placed in a geotechnical centrifuge are often complex structures, advanced analysis methods to assess their performance under enhanced acceleration fields are desirable. This paper presents the anal...

Journal: :Plant biology 2013
M F Tobin R B Pratt A L Jacobsen M E De Guzman

Vulnerability to cavitation curves describe the decrease in xylem hydraulic conductivity as xylem pressure declines. Several techniques for constructing vulnerability curves use centrifugal force to induce negative xylem pressure in stem or root segments. Centrifuge vulnerability curves constructed for long-vesselled species have been hypothesised to overestimate xylem vulnerability to cavitati...

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