A herb is sometimes used on its own or sometimes as part of a formula that contains several herbs. The latter, termed polypharmacy, employs a teamwork effect that is appropriate when the power of a single herb needs to be supplemented. Very often the formula consists of one main herb with others acting as support. The support team can be made up of one or two herbs, or even ten or twelve. The main herb may, for example, be required to soothe impaired tissue, while the others assist in nourishment, help eliminate toxins, assist in nerve or blood supply, or…
Author: Alexander
Brand Creation Brand Extension The same concept discussed above concerning film applies to TV, but less frequently or less overtly. While it is easy to list a series of books translated into movies, the same task is more complicated on TV. The trend is vital for classic kids’ comics and properties (e.g., Spiderman, Batman, X-men), but far fewer adult series are spawned from books and other media. Economically, it is not apparent why this is the case; TV could similarly benefit from a big launch bolstered by high pre-awareness of the subject. Therefore, the reason seems to lie more in…
From the vast literature available now on porous silicon, few trends are noticed as follows. The morphology, optical and structural properties of porous silicon depend upon (1) Substrate type (n or p), (2) Doping level (low or high), (3) Concentration of HF in the electrolyte, (4) Current density used to etch silicon, (5) Effect of light, and (6) Duration of etching (Box 11.4). Box 11.4: Porous Material Materials become porous when some solid portion is removed from them leaving voids in them. The volume of the original material does not alter. Therefore density of a porous material is lower than…
CdS (or other sulphide nanoparticles) nanoparticles can be synthesized using DNA. We have seen in Chap. 4 that organic molecules can cap the surfaces of nanoparticles growing in solutions. Similarly one can use DNA to bind with surface of growing nanoparticles. For example double stranded Salmon Sperm DNA can be sheared to an average size of 500 bp. DNA Details: Cadmium acetate can be added to desired medium like water, dimethylformamide, ethanol, propanol etc. and reaction is carried out in a glass flask with facility to purge the solution and flow with an inert gas like nitrogen. Addition of DNA…
You’ve seen that different distributions can be characterized by their shape. For example, a distribution may be skewed positively or negatively or may be symmetric about its midpoint. These visual judgments we make of a distribution’s shape also can be quantifi ed with a statistic. One of these is the skewness statistic. Skewness is a measure of the lack of symmetry in the distribution of the data values. A positive skewness value indicates a distribution with values clustered toward the lower range of values with a long tail extending toward the upper values’ range. A negative skewness indicates just the…