Two mechanisms exist for the transport of small-molecular weight material and small molecules.Primary active transportmoves ions across a membrane and creates a difference in charge across that membrane, which is directly dependent on ATP.Secondary active transportdescribes the movement of material that ...
Active transport requires no energy and the molecules move with the concentration gradient from low concentration to a high concentration. True False Passive transport requires no energy and the molecules move with the concentration gradient from high concentration to low concentrati...
The water flux is a result of the diffusion of water molecules across the membrane, with two important factors affecting the velocity of this transport: the magnitude of driving force and the selectivity of FO membrane on water molecules. As the driving force for water separation is quantified ...
Relatively short half-lived isotopes such as 18F (t1/2 = 109.8 min) and 64Cu (t1/2 = 12.7 h) are frequently used as radioactive tracers to label siRNA molecules or drug delivery systems for PET imaging. In one recent study, core/shell-structured hollow gold nanospheres (HAuNS) were ...
Nanoscale transport through nanopores and live-cell membranes plays a vital role in both key biological processes as well as biosensing and DNA sequencing. Active translocation of DNA through these nanopores usually needs enzyme assistance. Here we present a nanopore derived from truncated helicase E1 ...
The 8CB molecules are radially oriented in concentric rings and the boundary shear stress experienced by the active filaments is much lower along than perpendicular to the rings. Hence, bundles preferentially move along circular trajectories, centred on the focal conics (Fig. 2b, c). The minimum...
The digestion of ___ takes place in the stomach by the actions of enzymes operating at low pH. This digestion continues in the small intestine and the large molecules are broken down into ___. a. proteins/amino acids b. carbohydrates/mono...
Chapter 8. Radioactive isotopes and Their Applications Introduction Production of Radioisotopes Some Commonly Used Radio
Ionizing radiation is a form of electromagnetic radiation that is carried by any of several types of particles and rays given off by radioactive material and nuclear reactions. When ionizing radiation impacts a molecule, it knocks electrons off the molecules, thus creating ions. Non-ionizing radiati...
[HTAB] for full-homeotropic alignment was increased to the cell gap until it was too large to support the transfer of the surface alignment to the LC molecules, due to the weak anchoring nature of HTAB. We also showed the phase-change characteristic of the LC mixture related to [HTAB]...