A solar-powered airplane finished crossing the United States on Saturday, landing in New York City after flying over the Statue of Liberty during its historic bid to circle the globe, the project team said. The spindly, single-seat experimental aircraft, dubbed Solar Impulse 2, arrived at New York's John F. Kennedy International Airport at about 4 a.m. local time after it took off about five hours beforehand at Lehigh Valley International Airport in Pennsylvania, the team reported on the airplane's website. Such a pleasure to land in New York! For the 14th time we celebrate sustainability," said the project's co-founder Andre Borschberg on Twitter after flying over the city and the Statue of Liberty during the 14th leg of the trip around the globe. The Swiss team flying the aircraft in a campaign to build support for clean energy technologies hopes eventually to complete its circumnavigation in Abu Dhabi, where the journey began in March 2015. The solar cr...
Researchers in the US have measured how boa constrictors end the lives of their prey.The work has busted a myth that the snakes choke out their casualties. Analysts took estimations - including circulatory strain and heart movement - from anesthetized rats grasped by the snakes. This demonstrated that the deadly hold confined blood stream seriously enough to remove the blood stream supplying oxygen to its imperative organs. The discoveries are distributed in the Journal of Experimental Biology.
This "circulatory capture", the researchers say, is an a great deal more proficient, quick and clear method for completing off prey than anticipated. As the lead specialist, Prof Scott Boback, from Dickinson College in Pennsylvania, clarified, confining blood stream to the cerebrum would likewise make a rat "go out inside of seconds". The specialists accept that recording amid a choking could uncover valuable insights about how smash wounds cause complex tissue harm in people. Yet, Prof Boback and his group are intrigued principally in the essential inquiry of how and why these snakes advanced their remarkable executing method."The thing I discover entrancing is that the sum total of what snakes have is their mouth to draw in with prey," said Prof Boback. "A constrictor needs to hold a conceivably perilous creature right alongside it.
"What's more, that creature's battling for its life, so it will completely take lumps out the snake on the off chance that it can."
He and his associates understood that, so as to gauge this desperate fight, they would need to record the very purpose of death of the prey. They introduced anesthetized, oblivious lab rats to boa constrictors, and recorded from the rats' supply routes and heart as they were crushed. The researchers additionally took blood tests previously, then after the fact, uncovering how the blood science of a contracted casualty changed. From this, they presumed that the narrowing "close off" blood stream and oxygen supply to the organs.
pulverizes the tissue of the eager for oxygen cerebrum, heart and liver. "In the event that the snake is wrapping around the midsection, it could likewise be constraining breathing, as well," said Dr Boback. "Be that as it may, an unlucky deficiency of blood stream will bring about death more quickly than suffocation.
"So it could be viewed as a substantially more exact and proficient technique for executing." This study is the first to test for this circulatory capture specifically - measuring from the assortment of the snake's prey. Prof Brad Moon, from the University of Louisiana at Lafayette, has mulled over snake developments, including choking, for two decades.
He said the study demonstrated constrictors could "crush prey sufficiently hard" to meddle with blood weights, blood gasses, blood science, and even heart capacity. "It isn't the first test of circulatory capture from choking," Prof Moon told, "yet it is the first direct test that deliberate blood weights and heart activity.
"It demonstrates that choking is more grounded, speedier and more compelling than anticipated." In a past study, the same Dickinson College group found that the snakes had the capacity sense their casualty's pulse, and quit pressing just when it ceased.
Comments
Post a Comment