Krill fishery
Krill fishery is the profitable fishery of krill, small shrimp-like marine animals that live in the oceans world-wide. Estimates for how much krill there is vary wildly, depending on the methodology used. They range from 125–725 million tones of biomass globally. The total global harvest of krill from all fisheries amounts to 150 – 200,000 tones annually, mainly Antarctic krill (Euphausia superb) and North Pacific krill (E. Pacifica).
Krill are rich in protein (40% or more of dry weight) and lipids (about 20% in E. superb). Their exoskeleton amounts to some 2% of dry weight of chitin. They also contain traces of a wide array of hydrolytic enzymes such as proteases, carbohydrates, nucleases and phospholipids, which are intense in the digestive gland in the cephalothoraxes of the krill.
Monday, September 24, 2007
Monday, September 17, 2007
Pollen
Pollen is a fine to coarse powder consisting of micro gametophytes (pollen grains), which create the male gametes (sperm cells) of seed plants. The pollen grains with its hard coat protect the sperm cells throughout the process of their movement between the stamens of the flower to the pistil of the next flower.
Pollen is a fine to coarse powder consisting of micro gametophytes (pollen grains), which create the male gametes (sperm cells) of seed plants. The pollen grains with its hard coat protect the sperm cells throughout the process of their movement between the stamens of the flower to the pistil of the next flower.
Monday, September 10, 2007
Earth's atmosphere
Earth's atmosphere is a layer of gases surrounding the planet Earth and retain by the Earth's gravity. It contains roughly (by molar content/volume) 78% nitrogen, 20.95% oxygen, 0.93% argon, 0.038% carbon dioxide; trace amounts of other gases, and a changeable amount (average around 1%) of water vapor. This mixture of gases is usually known as air. The atmosphere protects life on Earth by captivating ultraviolet solar radiation and reducing temperature extremes between day and night.
There is no exact border between the atmosphere and outer space, it slowly becomes thinner and fades into liberty. Three quarters of the atmosphere's mass is within 11 km of the terrestrial surface. In the United States, people who travel above a height of 80.5 km (50 statute miles) are selected astronauts. An altitude of 120 km (400,000 ft) marks the boundary where atmospheric property becomes obvious during re-entry. The Kármán line, at 100 km (328,000 ft), is also often regarded as the boundary between atmosphere and outer space.
Earth's atmosphere is a layer of gases surrounding the planet Earth and retain by the Earth's gravity. It contains roughly (by molar content/volume) 78% nitrogen, 20.95% oxygen, 0.93% argon, 0.038% carbon dioxide; trace amounts of other gases, and a changeable amount (average around 1%) of water vapor. This mixture of gases is usually known as air. The atmosphere protects life on Earth by captivating ultraviolet solar radiation and reducing temperature extremes between day and night.
There is no exact border between the atmosphere and outer space, it slowly becomes thinner and fades into liberty. Three quarters of the atmosphere's mass is within 11 km of the terrestrial surface. In the United States, people who travel above a height of 80.5 km (50 statute miles) are selected astronauts. An altitude of 120 km (400,000 ft) marks the boundary where atmospheric property becomes obvious during re-entry. The Kármán line, at 100 km (328,000 ft), is also often regarded as the boundary between atmosphere and outer space.
Tuesday, September 04, 2007
Dance
Dance means in Old French dancier, perhaps from Frankish generally refers to human movement also used as a form of expression or presented in a social, spiritual or performance setting.
Dance also is used to explain methods of non-verbal communication (see body language) between humans or animals (bee dance, mating dance), motion in inanimate objects (the leaves danced in the wind), and certain musical forms or genres.
Choreography is the art of making dances, and the human being who does this is called a choreographer.
Definitions of what constitutes dance are dependent on social, cultural, visual, artistic and moral constraints and variety from functional movement (such as folk dance) to codified, virtuoso techniques such as ballet. Dance disciplines live in sports such as gymnastics, figure skating, and synchronized swimming and martial arts kata are often compare to dance.
Dance means in Old French dancier, perhaps from Frankish generally refers to human movement also used as a form of expression or presented in a social, spiritual or performance setting.
Dance also is used to explain methods of non-verbal communication (see body language) between humans or animals (bee dance, mating dance), motion in inanimate objects (the leaves danced in the wind), and certain musical forms or genres.
Choreography is the art of making dances, and the human being who does this is called a choreographer.
Definitions of what constitutes dance are dependent on social, cultural, visual, artistic and moral constraints and variety from functional movement (such as folk dance) to codified, virtuoso techniques such as ballet. Dance disciplines live in sports such as gymnastics, figure skating, and synchronized swimming and martial arts kata are often compare to dance.
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