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Kamis, 10 Februari 2011

Darkness In Depth Ocean






Prof. Durga Rao is a world renowned expert in the field of Marine Geology and was a professor at King Abdul Aziz University in Jeddah. He was asked to comment on the following verse:

“Or (the Unbelievers’ state) is like the depths of darkness in a vast deep ocean, overwhelmed with ...
billow topped by billow, topped by (dark) clouds:
depths of darkness, one above another:if a man stretches out his hand, he can hardly see it! For any to whom Allah giveth not light, there is no light!” [Al-Qur’an Nur 24:40]

Prof. Rao said that scientists have only now been able to confirm, with the help of modern equipment, that there is darkness in the depths of the ocean. Humans are unable to dive unaided underwater for more than 20 to 30 metres, and cannot survive in the deep oceanic regions at a depth of more than 200 metres. This verse does not refer to all seas because not every sea can be described as having accumulated darkness layered one over another. It refers especially to a deep sea or deep ocean, as the Qur’an says, “darkness in a vast deep ocean”. This layered darkness in a deep ocean is the result of two causes:

1. A light ray is composed of seven colours seen in the rainbow. These seven colours are Violet, Indigo, Blue, Green, Yellow, Orange and Red (VIBGYOR). The light ray undergoes refraction when it hits water. The upper 10 to 15 metres of water absorb the red colour. Therefore, if a diver is 25 metres under water and gets wounded, he would not be able to see the red colour of his blood, because the red colour does not reach this depth. Similarly, orange rays are absorbed at 30 to 50 metres, yellow at 50 to 100 metres, green at 100 to 200 metres, and finally, blue beyond 200 metres and violet and indigo above 200 metres. Due to successive disappearance of colour, one layer after another, the ocean progressively becomes darker, i.e. darkness takes place in layers of light. Below a depth of 1000 meters there is complete darkness.1

2. The sun’s rays are absorbed by clouds which in turn scatter light rays thus causing a layer of darkness under the clouds. This is the first layer of darkness. When light rays reach the surface of the ocean they are reflected by the wave surface giving it a shiny appearance. Therefore, it is the waves which reflect light and cause darkness. The unreflected light penetrates into the depths of the ocean. Thus, the ocean has two parts. The surface characterized by light and warmth and the depth characterized by darkness. The surface is further separated from the deep part of the ocean by waves.
The internal waves cover the deep waters of seas and oceans because the deep waters have a higher density than the waters above them.
The darkness begins below the internal waves. Even the fish in the depths of the ocean cannot see; their only source of light is from their own bodies.

The Qur’an describes this aptly:

“Darkness in a vast deep ocean overwhelmed with waves topped by waves”.

In other words, above these waves there are more types of waves, i.e. those found on the surface of the ocean. The Qur’anic verse continues, “topped by (dark) clouds; depths of darkness, one above another.”
These clouds as explained are barriers one over the other that further cause darkness by absorption of colours at different levels.
Prof. Durga Rao concluded by saying,--“1400 years ago a normal human being could not explain this phenomenon in so much detail. Thus the information must have come from a supernatural source”.

“It is He Who has Created man from water:
then has He established relationships of lineage and marriage: for thy Lord has power (over all things).”[Al-Qur’an Furkan 25:54]

Was it possible 14 centuries ago for any human being to guess that every living being was made from water? Moreover would such a guess be conceivable by a human being in the deserts of Arabia where there has always been scarcity of water?

1 Oceans, Elder and Pernetta, p. 27.
1 The reference for this statment is the video tape titled ‘This is the Truth’.



-Science Islam-

Jumat, 21 Januari 2011

River Water Turned Bright Green In Canada

   

      Goldstream River in the 'failing life' Canada as a name that means 'golden stream' when the water was strangely turned into a bright green or neon green. Langford town across the river in British Columbia, looks like the end result of a radioactive disaster. Later known, causes changes in river water was initially mysterious result of the use of an organic compound used as a dye to test the water system. However, local officials questioned the incident. Because, at that time there was no test conducted. Tyson is the Elder (24) and his friends down the river to memoto bald eagles or Bald Eagles at the sight of bright green water of the river on December 29, 2010. "From a distance I could see was the bright green color," he said, as published Daily Mail, 12 January 2011. "Seeing something very unexpected bright and a little scary, especially because this area is a popular tourist destination." In season cold, he adds, bald eagles are known to nest in the vicinity of the river, Tyson and his colleagues worried about changing the color of river water animal life threatening. News neon green river spread rapidly after Tyson uploading his pictures on Twitter. 

      Tyson said, then, spread along 400 meters of green color for about 3 hours. Not only take pictures, he and his colleagues also record and upload it to YouTube. This video is instantly skyrocketed and viewed more than 550 thousand people. Conversely, the head of the fire department Langford, suspects Bob Beckett, the color green on the river that work prankster. "It's like a trick, we will investigate this case," he said. Is the green dye harmful? Vancouver health officials said fluorescein substance, which is also used as a tracer in medical procedures, although not poisonous, can cause allergic reactions. "It does not have high toxicity, but can cause a  allergy Reaction ".said medical officer, Murray Fyfe. So far not reported the death of fish or other animals in mass due to the turn the river green. According to the newspaper, News Montreal, in just one hour, the color of the river returned to normal.




His name is Tyson"








Senin, 25 Oktober 2010

Freak Squid Fossil

 The Squid called Logili Pealii,,From Biologist,, Araan Money's

ok now i'm description this post.....be careful



In a hangar-like research building at the Woods Hole Oceanographic Institution (WHOI), biologist T. Aran Mooney is exploring virtually uncharted waters: Can squid hear? Is their hearing sensitive enough to hear approaching predators? How do squid and other marine species rely on sound to interact, migrate, and communicate? Will the burgeoning cacophony of sound in the ocean disrupt marine life's behavior and threaten their survival?
"The sound in the ocean is increasing…commercial shipping, oil and gas exploration…those make a lot of noise," Mooney says. "And you don't know how that is going to affect the animal unless you know what it hears."
Mooney, a postdoctoral scholar at WHOI, has undertaken seminal investigations into the hearing of this seminal creature in the marine food web. His study is published Oct. 15, in the Journal of Experimental Biology.
"Almost every type of marine organism feeds somehow off the squid," says Mooney. Not just fish, but also many birds, seals, sea lions, and dolphins and toothed whales depend heavily on squid. Whales, according to Mooney, consume some 320 metric tons of squid a year; people eat another 280 metric tons annually.
Mooney says it may be the squid's role as a predator's entrée that holds the key to understanding the importance of hearing among squid and other ocean creatures. This is because predator avoidance is a key pressure for evolving hearing capabilities. If you can hear your predators approaching, you have a better chance of avoiding them. Eventually, he said, a better understanding of how squid hear may shed light on human hearing as well.
Despite their importance in the marine food web, little is known about how well squid hear and whether they rely on hearing to navigate, sense danger, and communicate with each other. Until recently, it wasn't clear that they even hear at all.
It is known now, through the work of Mooney and others, that the squid hearing system has some similarities and some differences compared to human hearing. Squid have a pair of organs called statocysts, balance mechanisms at the base of the brain that contain a tiny grain of calcium, which maintains its position as the animal maneuvers in the water. These serve a function similar to human ear canals.
Each statocyst is a hollow, fluid-filled sac lined with hair cells, like human cochlea. On the outside of the sac, the hair cells are connected to nerves, which lead to the brain. "It's kind of like an inside-out tennis ball," Mooney said, "hairy on the inside, smooth on the outside."
The calcium grain, called a statolith, enables the squid to sense its position in the water, based on which hair cells it's in contact with at a given moment. Normally it rests near the front of the sac, touching some of the hair cells.
When a squid moves quickly -- as it does when it flees an approaching predator -- the heavy calcium stone lags behind slightly before catching up to the hair cells. "Kind of like your stomach on a roller coaster," Mooney said. "The hair cells are very sensitive and can detect the calcium statolith lagging behind, then catching up."
Structurally, the statocyst "is analogous to our auditory system," said Mooney, who began his hearing research while working on his Ph.D. at the University of Hawaii. The statocyst, he thinks, "is on its way to becoming an ear" like the more familiar ears of vertebrates.
But to what extent does it function as an ear? "One of the obvious questions is, 'Can this acceleration-sensing 'ear' to also detect sounds?' Then, if they can hear sounds 'Do squid hear their predators coming?' " Mooney asked.
To find out if squid have true, functioning "ears," Mooney tests whether the nerves coming from the statocysts send impulses in response to sound. He anesthetizes a squid and attaches an electrode just under the skin near the nerves that extend from the statocysts. He attaches another sensor into the squid's back to get baseline measurements of electrical signals, because that part of the body should not respond to sounds.
He then lowers the squid into a shallow, 3-foot-wide tank. Also in the tank is a speaker that can emit a broad range of sound frequencies -- pure tones repeated about 1,000 times for each frequency. He then records the 1,000 responses to each. Averaging those 1,000 responses reduces the natural, random electrical noise in the body yielding the electrical signals, in millivolts, that occur along the nerves after each tone. This hearing test method is similar to those used to checking hearing in human infants.
His preliminary findings indicate that nerve responses showed the squid "actually do hear," he said. "But they only hear up to a certain frequency, about 500 Hz, which is pretty typical of a lot of fish that don't hear very well." Humans hear from about 20-20,000 Hz. Squid also do not detect the very high frequency sounds of dolphin echolocation clicks.
That may help explain why squid are such a prolific food source: They may not always hear well enough to get out of the way of approaching predators. But when Mooney and his post-doc advisor [name?] put the squid in a CT scanner, they found that squid may avoid predators in another way: they are almost the same density as water. That is, when squid were scanned in water, the CT could not image the squid body, illustrating that squid are nearly transparent to sound. This would likely make them very difficult for echolocating predators to detect. So, perhaps, squid could not take the evolutionary leap to adapt ears to detect very high frequencies, but being close in density to water is advantageous for several reasons, including avoiding predators.
Still, its auditory mechanisms have been good enough to make squid successful in an evolutionary sense. What, then, is the main purpose of the squid's hearing system?
Mooney said his work falls under the heading of "sensory biology," the study of how animals use their sensory systems to figure out the world around them. After the initial tests to see how sensitive squid are to sounds and their frequency range, he next studies will be to try to determine how important those abilities are to the animal. Do squid rely on sound to interact, migrate, communicate?
In one set of experiments Mooney will move the speakers to different positions and measure the nerves' response to see if they sense the location of that speaker.
"It's been suggested that a primary evolutionary drive behind hearing is to locate where the sound source is," he said. "If your mother is calling to you, you have to know where your mother is. If there's a predator coming you'd better darn well know where that predator is coming from so that you can get out of the way."
Another question Mooney wants to pursue is how much -- if at all, squid are affected by sounds of human origin in the ocean. Loud sounds, whether a sudden explosion or continuous ship traffic, might cause squid to migrate unnaturally just to escape the racket.
Mooney also thinks squid statocysts can tell scientists a lot about how ears originated and evolved.
"Humans, fish, and lots of animals use hair cells to detect sound and movement. Their hair cell structures are similar to squid, but also quite different," said Mooney. "There is probably a basic structure which evolved millions of years ago, but vertebrates and invertebrates have taken quite different evolutionary paths since.
"By learning more about squid hearing and squid hair cells, we might learn what is important in human hearing and human hair cells, or other animals for that matter," he said. "Down the road, squid ears and hair cells might be models for examining human hearing. But that's just speculative right now. We need to learn more about the basic functioning of squid ears first."
Paul Nachtigall, a biologist at the University of Hawaii who advised Mooney on his doctoral research on hearing and echolocation in whales and dolphins, said Mooney's research on squid hearing mechanisms and the ecological uses of hearing in squid are "groundbreaking."
"Aran was launched out of here with great success," said Nachtigall, "and his rocket appears to have reached stage two prior to reaching a stellar orbit."
Mooney's work with squid is funded by The Grass Foundation and a WHOI Independent study award from the Andrew W. Mellon Fund for Innovative Research.

Coccolithophore Blooms

This Observation from Dr.Stuart Painter between january-december time

Coccolithophores are key members of the marine phytoplankton community. They are abundant in the sunlit upper layer of the world's oceans, often forming vast blooms that can be seen from space.
"Coccolithophores are a complex group of plankton and in many areas of the World Ocean satellite-based observations provide the only information we have. We often have little direct knowledge of the environmental factors coincident with these blooms," explained Painter.
To understand the environmental factors controlling the development of coccolithophore blooms, Painter and his coauthors joined a cruise led by Dr William Balch of the Bigelow Laboratory (Maine, USA) and measured the salinity, chemistry and nutrient levels of the waters overlying the Patagonian Shelfand the shelf break, where the seafloor dips down to the deep seabed.
They also took measurements at the Brazil/Falklands Confluence to the northeast, where two major currents collide. These are the Brazil Current, which carries warm, saline subtropical waters southwards, and the Falklands Current, which brings cold, fresh and nutrient-rich water up from the sub-Antarctic region.
The continental shelf itself experiences strong tides and inputs from large rivers. And to complicate matters further, low-salinity water also enters the Patagonian Shelf region from the Pacific Ocean through the Magellan Strait in the south.
"The marine environment of the Patagonian Shelf region is well known for its complexity but what has been less clear until now is how this relates to the large blooms of coccolithophores in this region," said Painter.
He and his collaborators identified five distinct water masses, each having different characteristics, such as temperature and nutrient concentration. These water masses also varied in the amount of chlorophyll in their surface waters, indicating different levels of phytoplankton production.
During the research cruise, a large bloom of the globally ubiquitous coccolthophore species Emiliania huxleyiformed in the sub-Antarctic Shelf Water (SSW), north of the Falkland Islands. The bloom extended north along the shelf break and coincided with the distribution of reflective calcite detected from space, which was otherwise diffusely distributed. Calcite is a carbonate mineral and a common constituent of limestone. It also forms the microscopic plates -- 'coccoliths' -- that surround coccolithophores, possibly for protection.
Chemical and nutrient measurements confirmed that conditions within the SSW were especially conducive for coccolithophore bloom formation, with the right cocktail of nutrients and seawater temperature.
However, the distribution of the SSW is strongly influenced by the shelf break front, which is the focus of intense biological production. It can vary from 20 to 200 kilometres in width determining exactly where conditions are right for coccolithophore blooms.
"The complex interaction of large currents and different water masses clearly exerts strong controls over the position of coccolithophore blooms in this region,"said Painter.
The research was carried out 2008, during the period of peak coccolithophore abundance (December), while aboard the America research vessel Roger Revelle. Remote sensing data collected by the Moderate Resolution Imaging Spectroradiometer (MODIS) instrument the Aqua satellite was acquired from NASA.
The researchers were Stuart Painter, Alex Poulton and John Allen of the National Oceanography Centre, Rosalind Pidcock of the University of Southampton's School of Ocean and Earth Science, and William Balch of the Bigelow Laboratory for Ocean Sciences, Maine, USA.
The Coccolithophores of the Patagonian Shelf (COPAS) research cruise was funded by the US National Science Foundation. Further financial support was provided by the US Defence Science and Technology Laboratory and the Natural Environment Research Council.

Jumat, 08 Oktober 2010

Ernest Rutherford Biography

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Ernest Rutherford


Ernest Rutherford was born on August 30, 1871, in Nelson, New Zealand, the fourth child and second son in a family of seven sons and five daughters. His father James Rutherford, a Scottish wheelwright, emigrated to New Zealand with Ernest's grandfather and the whole family in 1842. His mother, née Martha Thompson, was an English schoolteacher, who, with her widowed mother, also went to live there in 1855.

Ernest received his early education in Government schools and at the age of 16 entered Nelson Collegiate School. In 1889 he was awarded a University scholarship and he proceeded to the University of New Zealand, Wellington, where he entered Canterbury College*. He graduated M.A. in 1893 with a double first in Mathematics and Physical Science and he continued with research work at the College for a short time, receiving the B.Sc. degree the following year. That same year, 1894, he was awarded an 1851 Exhibition Science Scholarship, enabling him to go to Trinity College, Cambridge, as a research student at the Cavendish Laboratory under J.J Thompson. In 1897 he was awarded the B.A. Research Degree and the Coutts-Trotter Studentship of Trinity College. An opportunity came when the Macdonald Chair of Physics at McGill University, Montreal, became vacant, and in 1898 he left for Canada to take up the post.

Rutherford returned to England in 1907 to become Langworthy Professor of Physics in the University of Manchester, succeeding Sir Arthur Schuster, and in 1919 he accepted an invitation to succeed Sir Joseph Thomson as Cavendish Professor of Physics at Cambridge. He also became Chairman of the Advisory Council, H.M. Government, Department of Scientific and Industrial Research; Professor of Natural Philosophy, Royal Institution, London; and Director of the Royal Society Mond Laboratory, Cambridge.

Rutherford's first researches, in New Zealand, were concerned with the magnetic properties of iron exposed to high-frequency oscillations, and his thesis was entitled Magnetization of Iron by High-Frequency Discharges. He was one of the first to design highly original experiments with high-frequency, alternating currents. His second paper, Magnetic Viscosity, was published in the Transactions of the New Zealand Institute (1896) and contains a description of a time-apparatus capable of measuring time intervals of a hundred-thousandth of a second.

On his arrival at Cambridge his talents were quickly recognized by Professor Thomson. During his first spell at the Cavendish Laboratory, he invented a detector for electromagnetic waves, an essential feature being an ingenious magnetizing coil containing tiny bundles of magnetized iron wire. He worked jointly with Thomson on the behaviour of the ions observed in gases which had been treated with X-rays, and also, in 1897, on the mobility of ions in relation to the strength of the electric field, and on related topics such as the photoelectric effect. In 1898 he reported the existence of alpha and beta rays in uranium radiation and indicated some of their properties.

In Montreal, there were ample opportunities for research at McGill, and his work on radioactive bodies, particularly on the emission of alpha rays, was continued in the Macdonald Laboratory. With R.B. Owens he studied the "emanation" of thorium and discovered a new noble gas, an isotope of radon, which was later to be known as thoron. Frederick Soddy arrived at McGill in 1900 from Oxford, and he collaborated with Rutherford in creating the "disintegration theory" of radioactivity which regards radioactive phenomena as atomic - not molecular - processes. The theory was supported by a large amount of experimental evidence, a number of new radioactive substances were discovered and their position in the series of transformations was fixed. Otto Hahn, who later discovered atomic fission, worked under Rutherford at the Montreal Laboratory in 1905-06.

At Manchester, Rutherford continued his research on the properties of the radium emanation and of the alpha rays and, in conjunction with H. Geiger, a method of detecting a single alpha particle and counting the number emitted from radium was devised. In 1910, his investigations into the scattering of alpha rays and the nature of the inner structure of the atom which caused such scattering led to the postulation of his concept of the "nucleus", his greatest contribution to physics. According to him practically the whole mass of the atom and at the same time all positive charge of the atom is concentrated in a minute space at the centre. In 1912 Niels Bohr joined him at Manchester and he adapted Rutherford's nuclear structure to Max Plank's quantum theory and so obtained a theory of atomic structure which, with later improvements, mainly as a result of Heisenberg's concepts, remains valid to this day. In 1913, together with H. G. Moseley, he used cathode rays to bombard atoms of various elements and showed that the inner structures correspond with a group of lines which characterize the elements. Each element could then be assigned an atomic number and, more important, the properties of each element could be defined by this number. In 1919, during his last year at Manchester, he discovered that the nuclei of certain light elements, such as nitrogen, could be "disintegrated" by the impact of energetic alpha particles coming from some radioactive source, and that during this process fast protons were emitted. Blackett later proved, with the cloud chamber, that the nitrogen in this process was actually transformed into an oxygen isotope, so that Rutherford was the first to deliberately transmute one element into another.G. De Hevesy was also one of Rutherford's collaborators at Manchester.

An inspiring leader of the Cavendish Laboratory, he steered numerous future Nobel Prize winners towards their great achievements: Chadwick Blackett, Cockcroft and Walton, while other laureates worked with him at the Cavendish for shorter or longer periods: G.P Thompson, Appleton, Powell, and Asto. C.D. Ellis, his co-author in 1919 and 1930, pointed out "that the majority of the experiments at the Cavendish were really started by Rutherford's direct or indirect suggestion". He remained active and working to the very end of his life.

Rutherford published several books: Radioactivity (1904); Radioactive Transformations (1906), being his Silliman Lectures at Yale University; Radiation from Radioactive Substances, with James Chadwick and C.D. Ellis (1919, 1930) - a thoroughly documented book which serves as a chronological list of his many papers to learned societies, etc.; The Electrical Structure of Matter (1926); The Artificial Transmutation of the Elements (1933); The Newer Alchemy (1937).

Rutherford was knighted in 1914; he was appointed to the Order of Merit in 1925, and in 1931 he was created First Baron Rutherford of Nelson, New Zealand, and Cambridge. He was elected Fellow of the Royal Society in 1903 and was its President from 1925 to 1930. Amongst his many honours, he was awarded the Rumford Medal (1905) and the Copley Medal (1922) of the Royal Society, the Bressa Prize (1910) of the Turin Academy of Science, the Albert Medal (1928) of the Royal Society of Arts, the Faraday Medal (1930) of the Institution of Electrical Engineers, the D.Sc. degree of the University of New Zealand, and honorary doctorates from the Universities of Pennsylvania, Wisconsin, McGill, Birmingham, Edinburgh, Melbourne, Yale, Glasgow, Giessen, Copenhagen, Cambridge, Dublin, Durham, Oxford, Liverpool, Toronto, Bristol, Cape Town, London and Leeds.

Rutherford married Mary Newton, only daughter of Arthur and Mary de Renzy Newton, in 1900. Their only child, Eileen, married the physicist R.H. Fowler. Rutherford's chief recreations were golf and motoring.

He died in Cambridge on October 19, 1937. His ashes were buried in the nave of Westminster Abbey, just west of Sir Isaac Newton's tomb and by that of Lord Kelvin.
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