Search results
Results from the WOW.Com Content Network
Historically a cesium chloride (CsCl) solution was often used, but more commonly used density gradients are sucrose or Percoll.This application requires a solution with high density and yet relatively low viscosity, and CsCl suits it because of its high solubility in water, high density owing to the large mass of Cs, as well as low viscosity and high stability of CsCl solutions.
Computer-supported collaborative learning (CSCL) is a pedagogical approach wherein learning takes place via social interaction using a computer or through the Internet. This kind of learning is characterized by the sharing and construction of knowledge among participants using technology as their primary means of communication or as a common resource. [1]
Centrifugation is the first step in most fractionations. Through low-speed centrifugation, cell debris may be removed, leaving a supernatant preserving the contents of the cell. Repeated centrifugation at progressively higher speeds will fractionate homogenates of cells into their components.
The caesium chloride structure adopts a primitive cubic lattice with a two-atom basis, where both atoms have eightfold coordination. The chloride atoms lie upon the lattice points at the corners of the cube, while the caesium atoms lie in the holes in the center of the cubes; an alternative and exactly equivalent 'setting' has the caesium ions at the corners and the chloride ion in the center.
The simulator can be used by fast jet pilots to practice G-straining under the supervision of medical personnel. [5] The system contains a flight simulator that allows the pilot to "fly" and apply the G-forces as they would in a real aircraft. This is aided by its ability to simulate pitch and roll.
Various technologies may provide information that may be used for assessment purposes. For example, email, computer conferencing systems, bulletin boards, and hypermedia can be used as media for communication between group members in CSCL classrooms. [5] (p. 13). This technology can be used to keep a record of the students' interactions.
CSCL can refer to: Caesium chloride (CsCl), a chemical compound. Computer Supported Collaborative Learning , a research topic on supporting collaborative learning with the assistance of computer artifacts.
An ultracentrifuge is a centrifuge optimized for spinning a rotor at very high speeds, capable of generating acceleration as high as 1 000 000 g (approx. 9 800 km/s²). [1] There are two kinds of ultracentrifuges, the preparative and the analytical ultracentrifuge.