How does seaweed grow? Detailed answer

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How does seaweed grow? Detailed answer

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How does seaweed grow?

If you had an aquarium at home, you probably noticed that a greenish coating appeared on its surface, as if from nowhere. This is algae. And when you bathed in some ponds and lakes, some plants stuck to your feet. It's also algae. There are thousands of types of algae, and they grow all over the world: in swamps, ponds, lakes, rivers, and even oceans. Their sizes are different: from the smallest porous microorganisms to dense strong marine plants, reaching 30 meters in length.

Algae are one of the most primitive forms of plant life. Some of them consist of one independent cell. Others are connected in long chains, others form a whole network of cells. Some separate and form new colonies.

Algae contain chlorophyll, which helps them absorb sunlight and produce their own nutrients. In this, algae differ from fungi, their related plants.

The most widespread are green algae, which we observe in a quiet pond in the form of a greenish coating on the surface of the water. In addition to chlorophyll, some giant algae and kelp (brown algae) contain a yellowish-brown pigment. The stems of some brown algae are so strong and durable that they are used to make ropes and ropes from them, iodine is obtained from part of the algae.

Red algae - very beautiful marine plants, delicate in shape, have a different red color. There are so many of them that sea water acquires a reddish hue, as, for example, in the Red Sea.

Diatoms have tiny scales. After the death of the algae, these scales sink to the seabed, forming deposits up to several meters thick.

Author: Likum A.

Random interesting fact from the Great Encyclopedia:

How did lullabies and rhymes save the inhabitants of Simelue Island from the tsunami?

Up to 2004 people were killed or missing in the 300 Indian Ocean earthquake and subsequent tsunami. However, on the Indonesian island of Simelue, which was closest to the epicenter, only seven out of 000 people became victims. The wave came to the island 80 minutes after the tremors, but by that time almost all the inhabitants had climbed up the hill in an organized manner. This was made possible thanks to the folklore - lullabies, rhymes, stories - that arose after a similar tsunami in 000, which claimed the lives of more than half of the islanders. From generation to generation, residents in various forms passed on to children a simple instruction: if the earth shakes, after which the water subsides, you need to drop everything and run up.

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The capacity of hard drives will dramatically increase 01.04.2012

Seagate was able to increase the data density in the hard drive by 55% - up to 1 Tbps per square inch. It is expected that the new technology within the next 10 years will make it possible to create hard drives with a capacity of up to 60 TB. Seagate Technology, the world's largest magnetic storage maker, has announced that it has achieved a data density of 1 Tbit (1 trillion bits) per square inch of hard drive platter. Seagate claims to be the first in the market to reach this milestone and reports that the 1 trillion bits that the company's new technology can record per 1 square inch is significantly more than the stars in our galaxy, the number of which ranges from 200 to 400 billion .

It was possible to increase the density of data recording due to the transition to a new generation technology called thermally assisted magnetic recording (HAMR), Seagate said. This technology opens up new perspectives in the traditional hard drive market. The company claims that on its basis over the next 10 years it will be possible to create hard drives with a capacity of up to 60 TB. The current-generation technology used in today's hard drives, called Perpendicular Magnetic Recording (PMR), will reach the 1TB per square inch limit within the next few years, after which it will no longer be developed, Seagate stressed.

PMR technology, in turn, has replaced the longitudinal recording technology that has been used since the inception of the personal magnetic storage market in 1956. Today, PRM offers a recording density of 620 Gbps per square inch. Thus, already now HAMR technology offers a 55% increase in density. The company said that the new technology solves the problem of data distortion, which occurs in current generation technology due to the fact that the cell size becomes too small.

The capacity of modern hard drives with a recording density of 620 Gb per square inch is 3 TB in the case of a 3,5-inch form factor and 750 GB in the case of a 2,5-inch one. HAMR technology already at the initial stage will make it possible to create hard drives with a capacity of 6 and 2 TB, respectively. The maximum theoretical density when using HAMR is 5-20 Tbps per square inch. This is equivalent to a 3,5-30TB 60" HDD and a 2,5-10TB 20" HDD.

"The development of social networks, search technologies, cloud computing, the growth of multimedia content and other areas force us to look for new ways to increase capacity," commented Mark Re, Seagate's senior vice president of engineering. "Innovations such as HAMR, will play a key role in the further development of the information industry."

Note that the magnetic storage market is going through hard times. It was hit by floods in Thailand last year, which led to a shortage of hard drives and reduced shipments of personal computers to the global market. In addition, manufacturers are under increasing competitive pressure from flash memory. In August 2011, major vendors formed an alliance to shape the future of the hard drive industry.

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