
SOURCE::::::::: http://www.glasbergen.com
Natarajan

One of the Vanguard satellites is checked out at Cape Canaveral, Florida in 1958. Vanguard 1, the world’s first solar-powered satellite, launched on St. Patrick’s Day (March 17) 1958. It was designed to test the launch capabilities of a three-stage launch vehicle and the effects of the environment on a satellite and its systems in Earth orbit. Vanguard 1 was the second U.S. satellite in orbit, following Explorer 1, and remains the oldest artificial object orbiting Earth to this day. Vanguard began as a program at the Naval Research Laboratory in Washington and transferred over to NASA (along with many of its personnel) after the agency was founded by the National Aeronautics and Space Act of 1958.
Image Credit: NASA
SOURCE::::: http://www.nasa.gov
Natarajan
Traditional tropical grass, Darbha, has been identified as an eco-friendly food preservative.

Darbha (Desmotachya bipinnata) is a tropical grass considered a sacred material in Vedic scriptures and is said to purify the offerings during such rituals.
This finding was evolved in a research study undertaken jointly by the Centre for Nanotechnology and Advanced Biomaterials (CeNTAB) and the Centre for Advanced Research in Indian System of Medicine (CARISM) of the SASTRA University, Thanjavur, under the supervision of Dr. P. Meera and Dr. P. Brindha respectively.

Darbha (Desmotachya bipinnata) is a tropical grass considered a sacred material in Vedic scriptures and is said to purify the offerings during such rituals.
At the time of eclipse, people place that grass in food items that could ferment and once the eclipse ends the grass is removed.
A systematic research was conducted by the SASTRA University researchers, in which cow’s curd was chosen as a food item that could ferment easily.
Five other tropical grass species, including lemon grass, Bermuda grass, and bamboo were chosen for comparison based on different levels of antibiotic properties and hydro phobicity.
Electron microscopy of different grasses revealed stunning nano-patterns and hierarchical nano or micro structures in darbha grass while they were absent in other grasses.
On studying the effect of various grasses on the microbial community of the curd, darbha grass alone was found to attract enormous number of bacteria into the hierarchical surface features.
These are the bacteria responsible for fermentation of cow’s curd.
During eclipse, the wavelength and intensity of light radiations available on the earth’s surface is altered. Especially, the blue and ultraviolet radiations, which are known for their natural disinfecting property, are not available in sufficient quantities during eclipse.
This leads to uncontrolled growth of micro-organisms in food products during eclipse and the food products are not suitable for consumption. Darbha was thus used as a natural disinfectant on specific occasions, say researchers at SASTRA University.
Further, the scientists say that darbha could be used as a natural food preservative in place of harmful chemical preservatives and the artificial surfaces mimicking the hierarchical nano patterns on the surface of darbha grass could find applications in health care where sterile conditions were required.
This entire research was funded by the SASTRA University’s Research Fund.
Keywords: SASTRA University research, darbha research, darbha grass, organic preservative, traditional tropical grass, Vedic systems
SOURCE::::::::::L.Renganathan in www.the hindu.com
Natarajan
It’s the type of encounter that can send panic through a herd, but this fearless impala refused to turn and run after a crocodile popped out of the water in front of it.
At one point the predator’s snout was just inches from the impala’s nose, but the bold gazelle didn’t back down as it casually sipped from a watering hole.
Tourist Graham Hewer snapped the jaw-dropping scene as he visited Kruger National Park
in South Africa.

Photographer Graham Hewer captured the jaw-dropping encounter during a visit to Kruger National Park in South Africa
The 29-year-old said the imapala simply walked away from the crocodile without giving it a second thought.
The crocodile was close enough to attack the impala, but its would-be prey remained calm and seemed oblivious to the fact that it was at death’s door.
Graham’s series of photos show a herd sipping from the lake as they keep a watchful eye on a group of much larger crocodiles nearby.

The bold impala survived the strange meeting, which photographer Graham Hewer puts down to the crocodile not feeling hungry.
His snaps then show the lone impala drinking from the watering hole, moments before its encounter with the crocodile.
The final photo shows the crocodile alone, with its razor-sharp teeth visible inside its gaping mouth.
Graham, a self-taught photographer from the South African capital of Pretoria, revealed he watched on in suspense, expecting the crocodile to kill the impala almost instantly.

After getting its fill from the lake the impala simply walked away from the crocodile without giving it a second thought
But bizarrely it survived the strange meeting – which he puts down to the croc not feeling hungry.
He said: ‘I got the camera ready just in time as the impala made their way towards the water.
‘One got close to a crocodile laying in the shallow water so I was expecting a straight kill.

Graham Hewer’s photos show a herd sipping from the lake as they keep a watchful eye on a group of large crocodiles
‘But the impala and the crocodile just had a face-to-face meeting.
‘All the people who have seen this image are amazed to hear the impala survived this face-off.
’That’s what fascinates me about photographing animals – its unpredictable, you never know what they will do.’
SOURCE:::::::::www.dailymail.co.uk
Natarajan