The Isro will roll-out a rival to Google Earth, the hugely popular online satellite imagery service, by the end of the month.
The project, dubbed Bhuvan , will allow users to zoom into areas as small as 10 metres wide, compared to the 200 metre wide zoom limit on Google Earth.
Bhuvan will use a network of satellites to create a high-resolution, bird’s-eye view of India – and later, possibly, the rest of the world – that will be accessible at no cost online and will compete with Google Earth. If a pilot version passes muster, Bhuvan will be fully operational by the spring. There are also plans to incorporate a global positioning system (GPS) into the online tool.
G Madhavan Nair, the Isro chairman, said: “This will not be a mere browser, but the mechanism for providing satellite images and thematic maps for developmental planning.”
Alex Burmaster, of Nielsen, the web analysts, said: “The amount of time that people spend online is reaching a plateau and websites are battling furiously for attention. Anything that relates to where a person is, saves a user time, and makes the web more relevant — especially geographically — is big news.”
Spread the word: related/readit
posted in Science News |
5. Endoplasmic Reticulum
The term “endo” refers to within the cytoplasm and a reticulum is a network.
ER produce protein and lipid components of most of the cell’s organelles. It form a interconnected irregular network of tubules, vesicles and sacs.
They may serve specialized functions in the cell including protein synthesis, sequestration of calcium, production of steroids, storage and production of glycogen, and insertion of membrane proteins. ER functions as a packaging system. ER works closely with the Golgi apparatus, ribososmes, RNA, mRNA, and tRNA.
ER is of two kinds:
Rough Endoplasmic reticulum and Smooth Endoplasmic reticulum
Rough endoplasmic reticulum gets its name from the presence of ribosomes on its surface for protein synthesis.They are very important in the synthesis and packaging of proteins. The newly synthesized proteins are sequestered in sacs, called cisternae store the complex molecules. As the ribosome builds the amino acid chain, the chain is pushed into the ER. When the protein is complete, the rough ER pinches off a vesicle. That vesicle, a small membrane bubble, can move to the cell membrane or the Golgi apparatus. When the protein is complete, the rough ER pinches off a vesicle. That vesicle, a small membrane bubble, can move to the cell membrane or the Golgi apparatus.
Smooth ER acts as a storage organelle in the cell. It creates and store steroids and ions. It consists of tubules and vesicles that branch forming a network. Because of the lack of Ribosomes it does not involved in protein synthesis. The SER is involved in cholesterol metabolism, membrane synthesis, detoxification,Ca++ storage along with other cellular processes.
It functions in diverse metabolic processes, including the synthesis of lipids, carbohydrate metabolism, and the detoxification of drugs and other poisons. Enzymes in the smooth ER are important to the synthesis of fats, phospolipids, steroids, and other lipids. The enzymes detoxify drugs and other poisons, especially in the liver cells. This makes it easier to flush the toxic out of the body.
Spread the word: related/readit
Continue…..!
posted in Zoology |
“INDIA With Tricolour on the MOON”
After US, former Soviet Union, Japan and the European Space Agency, India becomes the fifth member of this club who send a spacecraft to moon. Chandrayaan-1 nudges closer to moon, orbiting over its polar regions at 200 km periselene (nearest point from moon) and 7,500 km aposelene (farthest point from moon).
The tricolour was painted on all sides of the 29 kg Moon Impact Probe (MIP) which was attached to the top portion of the main lunar orbiter, Chandrayaan.
Chandrayaan-1 spacecraft successfully hit the lunar surface on November 14th at 20:31 hrs. Hosting of tricolor on the moon on Pandit Jawaharlal Nehru’s Birthday made it more remarkable.
Spread the word: related/readit
posted in Science News, Science World |
INDIA With Tricolour on the MOON
G Madhavan Nair an ISRO Chairman said, “India’s second lunar mission, Chandrayaan-II, will be launched by 2012. We will have a lander that will drop a small robot on the moon, which will pick samples, analyse data and send the data back. Already the project has been formulated for Chandrayaan-II,” he told reporters on the sidelines of a seminar here.
The Indian Space Research Organisation said, the Moon Impact Probe (MIP) on board Chandrayaan-1 is fixed to be released at 8.03 pm or 8.04 pm tonight. It’s expected to hit the lunar surface at around 8.31 pm,” ISRO spokesperson S Satish said.
As a forerunner, yesterday, MIP was detached from the main craft readying it for the final launch towards the moon’s surface.
Only weeks after the blast-off of India’s first unmanned moon mission, the country’s space agency plans to launch its own equivalent of Google Earth, the virtual globe programme, using its satellite network to create a high resolution web-based mapping system. The service, initially covering only India, will be offered at no cost to web users.
Spread the word: related/readit
posted in Science News, Space |
Organelle is a specialized subunit within a cell. It performs specific function. Cells are surrounded by a plasma membrane, which is made of a bilayer of phospholipids. Organelles are identified by microscope.
Cell Organelle and their functions are as:
1. Nucleolus:
The prominent structure in the nucleus is the nucleolus also called nucleole. This is a non-membrane bound structure. The nucleolus produces ribosomes, which move out of the nucleus and take positions on the rough endoplasmic reticulum where they are critical in protein synthesis.
2. Nucleus:
The nucleus is the most importent membrane-enclosed organelle in eukaryotic cells. It communicates with the surrounding cytosol via numerous nuclear pores. It contains most of the cell’s genetic material, organized as multiple long linear DNA responsible for providing the cell with its unique characteristics. The DNA is similar in every cell of the body, but depending on the specific cell type, some genes may be turned on or off - that’s why a liver cell is different from a muscle cell, and a muscle cell is different from a fat cell. When a cell is dividing, the DNA and surrounding protein condenses into chromosomes that are easily seen by microscopy.
3. Ribosomes:
Ribosomes are packets of RNA and protein that found in a cell and play a crucial role in both prokaryotic and eukaryotic cells. Protein synthesis occur here.
The ribosome functions in the expression of the genetic code from nucleic acid into protein, in a process called translation. Each ribosome comprises two parts, 65% ribosomal RNA and 35% ribosomal proteins. Messenger RNA from the cell nucleus is moved systematically along the ribosome where transfer RNA adds individual amino acid molecules to the lengthening protein chain.
4. Vesicle:
Also called Secretory Vesicle. Vesicle is a relatively small, intracellular, membrane-enclosed sac that stores or transports substances. Cell secretions - e.g. hormones, neurotransmitters - are packaged in secretory vesicles at the Golgi apparatus. The secretory vesicles are then transported to the cell surface for release. The vesicle is separated from the cytosol by at least one lipid bilayer.
If there is only one lipid bilayer, they are called unilamellar vesicles; otherwise they are called multilamellar.
Continue……..!
Spread the word: related/readit
posted in Zoology |
Stumble It!
Del.icio.us
