New York: A new type of fibre material developed by engineers for a handheld scanner can detect small traces of alkane fuel vapour, a valuable advancement. This could be an early-warning signal for leaks in an oil pipeline, an airliner, or for locating a terrorist’s explosive.
Alkane fuel is a key ingredient in combustible material such as gasoline, airplane fuel, oil — even a homemade bomb.
Currently, there are no small, portable chemical sensors to detect alkane fuel vapour because it is not chemically reactive. The conventional way to detect the odourless and colourless vapor is with a large oven-sized instrument in a lab.
“It’s not mobile and very heavy,” said one of the researchers Ling Zang, a professor at the University of Utah in the US.
“There’s no way it can be used in the field. Imagine trying to detect the leak from a gas valve or on the pipelines. You ought to have something portable,” Zang noted.
So Zang’s team developed a type of fibre composite that involves two nanofibres transferring electrons from one to the other.
“These are two materials that interact well together by having electrons transferring from one to another,” Ben Bunes, post-doctoral fellow at University of Utah, said.
“When an alkane is present, it sticks in between the two materials, blocking the electron transfer between the two nanofibers,” Bunes explained.
That kind of interaction would then signal the detector that the alkane vapor is present, the researchers said.
The discovery was published online in the journal ACS Sensors.
Vaporsens, a University of Utah spin-off company, has designed a prototype of the handheld detector with an array of 16 sensor materials that will be able to identify a broad range of chemicals including explosives.
This new composite material will be incorporated into the sensor array to include the detection of alkanes.
Vaporsens plans to introduce the device on the market in about a year and a half, Zang, who is also the company’s chief science officer, said. (IANS)
We always adore the ancient Egyptians for their flawless and vibrant beauty. Did you know that Oil is the real reason behind their beauty? Yes, that’s true! They applied Moringa oil. They considered Moringa oil as the best face oil. The thought of applying oil on your face may irk you to a great extent, but the benefits which oil gives you, cannot be given by cosmetic in this world. From preventing wrinkles to shrinking the enlarged face pores, they offer you a great deal. If you have dry skin, then oil acts as your skin’s antibiotic.
Five best face oils which can give you a flawless skin:
1. Jojoba Oil
The Unique feature of Jojoba oil is its similarity to our skin structure.It gets completely dissolved in the skin; balances out sebum production and prevents acne. It is comprised of important minerals and nutrients and functions as an element of all-day moisture to the skin. It is the best face oil for skin types- sensitive, dry and aged.
2. Castor Oil
There can be nothing as good as Castor Oil to deal with skin breakouts. Its antibacterial and anti-inflammatory properties eliminate the acne-causing bacteria, which helps in the reduction of skin breakouts; thus, making it a great deal for skin types prone to breakouts. It consists of Vitamin E, proteins, minerals and unsaturated fatty acids. It can heal the scars of skin. It is the best face oil for skin types which struggle with acne and sunburns.
3. Tamanu Oil
Tamanu oil is being used in medicines since ages. It has the capability of healing wounds and regenerating skin cells by fighting bacteria. The oil contains a lipid, calophyllolide, which is highly anti-inflammatory. It is beneficial for broken skin and the skin damaged from acne.
Hemp Seed Oil reduces facial pores and eliminates. Its anti-inflammatory properties induce elasticity in the skin. It comprises of 80% fatty acids and has the ideal ratio of omega-6 to omega-3 EFA (Essential Fatty Acids). Hemp seed oil is the best face oil.
5. Rosehip oil
Rosehip oil the best face oil for skin types- dry and oily. It penetrates to the deepest layers of the skin and regenerates cells. It is highly rich in vitamin C, Omega-6 and Omega-3 fatty acids, which help in curing scars. It also reduces the appearance of wrinkles and brightens the skin.
–by Megha Acharya of NewsGram. Megha can be reached at Twitter @ImMeghaacharya.
Old Mosul has been completely shattered in the battle to recapture the city from Islamic State militants
About 900,000 people have been displaced by the battle for Mosul, and many neighborhoods have been completely destroyed by war
Areas around the village are slowly being re-populated, but many places are entirely without services like trash collection, electricity, and running water
Mosul, September 5, 2017 : “All you can hear at night is the sound of broken doors flapping in the wind,” says Abd Elaam, a 50-year-old furniture maker. “Even soldiers stay indoors after dark.”
Elaam is currently one of the very few civilians living in Old Mosul, an ancient neighborhood shattered by the battle to recapture the city from Islamic State militants. Like many families that survived IS rule, he says, his resources are completely exhausted by the war and he has nowhere else to go.
Other families trickle in by day, looking to repair their broken homes or recover the bodies of their dead loved ones. But even during daylight hours, the neighborhood is dangerous, riddled with bombs and an unknown number of militants hiding out in the vast network of tunnels under the tightly-packed buildings and piles of rubble. The level of destruction has been compared to World War II Dresden.
“A IS militant came out of one those houses two weeks ago,” Elaam says, gesturing towards another dusty, broken street. “He blew himself up near two families. They were all injured and the bomber was cut in half.”
The militant’s body, like other fallen IS fighters in Old Mosul, was shoved under the rubble to reduce the smell of rot in the 45 degree-plus weather. When Iraq declared victory over IS in early July, the bodies of dead militants lay scattered in buildings and on the streets of nearly every block. Authorities searched through giant piles of concrete, once homes, for the remains of civilian families. But, they said, the only government department responsible for the IS bodies was garbage collection.
Old Mosul is far from re-establishing city services like trash pickup. There is no running water, electricity or businesses open. Yet other families are following Elaam’s lead, and plan to return to their homes as soon as possible.
“In a few days I will move back and bring my family,” says Ghanem Younis, 72, resting on a beige plastic chair in a sliver of shade. “If they provide electricity and water, everyone would come back.”
Younger men and children squat around Ghanem, recalling the isolation of the final months of the battle that began late last year. “We couldn’t go more than 50 meters from our front doors,” says Sufian, a 27-year-old unemployed construction worker. “We spent our time sitting right here with Uncle Ghanem.”
But it is not sentiment driving some families home despite the dangers, adds Elaam, as more neighbors join the conversation.
“People cannot stay with friends and relatives forever,” he says. Camps for those displaced are also crowded. “No one has anywhere else to go,” he adds.
A few blocks away, outside the checkpoints that cut off the Old City, the Zanjelli neighborhood is slowly being repopulated.
Construction workers build a market to replace one destroyed in airstrikes, while the owners of what was once a shoe store paint the shelves, hoping to re-open in the coming weeks. The wreckage from a few of the destroyed homes has been cleared away, and the bodies of many of the dead are now buried in graveyards.
In less than five minutes of conversation, at least three people tell us about family members, including toddlers, killed in airstrikes in the last months of battle.
“There was an IS sniper firing from next to my house and the airstrike hit us,” says Youseff Hussain, 35. “Fifteen members of my family were killed.”
Rebuilding the neighborhood, adds Hussain, is made doubly frustrating by the fact that it was Iraq’s allies, including the United States, who destroyed many of their homes as they battled IS from the air.
Many locals say the sacrifice of property and lives may have been necessary to prevent the city, then under siege, from total starvation. But after bearing the brunt of the war with IS, largely considered a global threat, residents say they thought the international community or the government would help them rebuild.
The only aid families here get right now, Zanjelli residents say, is Iraqi military rations, as soldiers share their food.
“There is nothing they can do to pay us back for what we have lost,” says Hussain. “But shouldn’t we at least get refunded for our property?” (VOA)
Large number of live bombs and munitions continue to be found in Germany even 70 years after the end of World War II
Bomb experts successfully defused a 1.4 ton British bomb in Germany
Largest evacuation carried out in Germany since the end of World War II
Frankfurt, September 4, 2017 : German bomb experts successfully defused a massive World War II bomb in the financial capital of Frankfurt on Sunday after nearly 65,000 people were evacuated to safety.
The 1.4 ton British bomb was found at a construction site last week.
Police on Sunday cordoned off a 1.5 kilometer radius around the bomb, leading to the largest evacuation in Germany since the end of World War II.
Helicopters with heat seeking devices scoured the area before the bomb experts began their work.
Among the evacuees were more than 100 patients from two hospitals, including people in intensive-care.
Experts had warned that if the bomb exploded, it would be powerful enough to flatten a whole street.
More than 2,000 tons of live bombs and munitions are discovered each year in Germany, more than 70 years after the end of the war. British and American warplanes pummeled the country with 1.5 million tons of bombs that killed 600,000 people.
German officials estimate that 15 percent of the bombs failed to explode. (VOA)