Thursday, July 27, 2006

Gerbera

Gerbera L., is a genus of ornamental plants from the sunflower family. It was named in honour of the German naturalist Traugott Gerber, a friend of Carolus Linnaeus. It has approximately 30 species in the wild; extend to South America, Africa, Madagascar, and tropical Asia. The first scientific description of a Gerbera was made by J.D. Hooker in Curtis Botanical Magazine in 1889 when he described Gerbera jamesonii, a South African species also known as Transvaal daisy or Barberton Daisy.

Gerbera species bear a large capitulum’s with striking, 2-lipped ray florets in yellow, orange, white, pink or red colors. The capitulum’s, which has the look of a single flower, is actually composed of hundreds of individual flowers. The morphology of the flowers varies depending on their position in the capitula. Gerbera is very popular and widely used as a decorative garden plant or as cut flowers. The domesticated cultivars are mostly a result of a cross between Gerbera jamesonii and another South African species Gerbera viridifolia.

Friday, July 14, 2006

Routing table

Routing tables are used in computer networks to direct forwarding by matching destination addresses to the network paths used to reach them. The construction of routing tables is the primary goal of routing protocols.In the simplest model, hop-by-hop routing, each routing table lists, for all reachable destinations, the address of the next device along the path to that destination; the next hop. Assuming that the routing tables are consistent, the simple algorithm of relaying packets to their destination's next hop thus suffices to deliver data anywhere in a network. In practice, hop-by-hop routing is being increasingly abandoned in favor of layered architectures such as MPLS, where a single routing table entry can effectively select the next several hops, resulting in reduced table lookups and improved performance.

The need to record routes to large numbers of devices using limited storage space represents a major challenge in routing table construction. Perhaps the fundamental assumptions of routing is that similar addresses are located near each other in the network, allowing groups of destination addresses to be matched by single routing table entries. The exact nature of how this grouping is done has changed over time and still represents an active area of networking research. In the Internet, the currently dominant address grouping technology is a bitwise prefix matching scheme called Classless Inter-Domain Routing.

Wednesday, July 05, 2006

Bacillus

Bacillus is a genus of rod-shaped, Gram-positive bacteria and a member of the division Firmicutes. Bacillus species are either obligate or facultative aerobes, and test positive for the enzyme catalase.Ubiquitous in nature, Bacillus includes both free-living and pathogenic species. Under stressful environmental conditions, the cells produce oval endospores that can stay dormant for extended periods. These characteristics originally defined the genus, but not all such species are closely related, and many have been moved to other genera.

An easy way to isolate Bacillus is by placing non-sterile soil in a test tube with water, shaking, placing in melted mannitol salts agar, and incubating at room temperature for at least a day. Colonies are usually large, spreading and irregularly-shaped. Under the microscope, the Bacillus appear as rods, and a substantial portion usually contain an oval endospore at one end, making it bulge.

Tuesday, July 04, 2006

Personal pronouns

Personal pronouns are pronouns that refer to objects of a sentence, usually,people or animals. They are often used as substitutes for proper or common nouns.In English, it is usual to use personal pronouns when the context is already understood, or could easily be understood by reading the sentences that follow. For example, one does not normally use the word "he" to refer to somebody if the person reading or hearing the sentence does not know to whom you are referring.

In addition, personal pronouns must correspond to the correct gender and number of people or objects being described. Using the word "it" in English to refer to a person, for example, is usually considered extremely derogatory. It is generally not accepted to use a singular version of a pronoun for a plural noun, and vice versa.

Sunday, July 02, 2006

Using agent

When they first begin looking for a home, many buyers ask "can't we do this on our own? Do we really need to use a Real Estate Agent?" The answer is yes, you can do it on your own. There is no law that prevents you, as an individual, from buying property without professional Real Estate assistance. You can search for homes, arrange showings, and even negotiate on your own (although, in some localities, the actual contract for purchase will need to be drawn up by an Attorney). The real question may be "do we want to do it on our own?"There is a misconception among many first time home buyers that by using a Real Estate Agent, they will be subject to paying a commission. In virtually all situations, this is not the case. The commission for the sale of a home is paid for by the seller, not the buyer. If you went to your local appliance store and bought a new refrigerator, you wouldn't expect to pay a commission to the salesperson. The same applies when you buy a house--it is the seller of the item (in this case a house) that is responsible for paying to have it sold.