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Comment by Dr. Krishna Kumari Challa on June 3, 2018 at 11:53am

Comment by Dr. Krishna Kumari Challa on June 2, 2018 at 6:56am

Comment by Dr. Krishna Kumari Challa on June 1, 2018 at 6:39am

Cars can turn coffins even if you park them in shade during high temperatures. 

Don’t count on a shady parking spot to save a child left in the back seat on a hot day.

A new analysis of temperatures inside parked cars reveals that a toddler in a sunbathed vehicle would reach lethal body temperatures faster than one left in the shade. But even in a shaded car, a child could die from overheating within a few hours, researchers report online May 23 in Temperature.

Researchers tracked temps inside three cars — a sedan, economy car and minivan — that were parked in the sun, and another three parked in the shade. Each car started at the outdoor air temperature or 29.4° Celsius, whichever was cooler. On days hotter than 38° C (about 100° Fahrenheit), it took an hour for the average ambient temperature inside the shaded vehicles to reach 38.3° C. For cars in the sun, the inside temperature hit a scorching 46.7° C in an hour, with surfaces such as steering wheels, dashboards and seat covers getting even hotter.

The researchers then simulated how the body temperature of a 2-year-old would increase under those conditions. On average, a toddler’s body would reach the potentially lethal temperature of 40° C (104° F) after about 1.4 hours in the sun and about 2.4 hours in the shade. It happened faster in some cars than others — a child left in a sunbaked sedan could die from overheating in just an hour. 

J.K. Vanos et al. Evaluating the impact of solar radiation on pediatric heat balance .... Temperature. Published online May 23, 2018. doi: 10.1080/23328940.2018.1468205.

Comment by Dr. Krishna Kumari Challa on May 16, 2018 at 8:36am

Edible water walls - eco-friendly replacement for plastic water bottles.

These biodegradable water balls are composed of algae (sea weed) and are edible materials. The preparation of edible water balls is very easy, and can be prepared at home. The preparation involves mixing of sodium alginate and calcium lactate with drinking water. This forms a gelatinous membrane structure and retains the drinking water in the middle of a gelatinous structure. Sodium alginate (NaAlg) coagulates when exposed to calcium chloride (CaCl2) and forms calcium alginate (CaAlg2 ) and sodium chloride (NaCl), according to the following reaction Eq.(1). The prepared calcium alginate ball with water is considered as a refreshing edible water drink and does not require a separate vessel like a bottle or a cup to hold water.

Currently, the edible water container is not available commercially, although the developers are working to bring it to market. The prototypes have been tested in several markets and certain limitations are associated to reach the market. Majorly, thin membrane is not strong enough to withstand shipping and handling on a large scale. This product is named “Ooho” the edible bottle. Drinking water from inside a soft edible membrane made from natural seaweed extract is considered as a sustainable product in the long run.

Comment by Dr. Krishna Kumari Challa on May 12, 2018 at 6:35am

Einstein proved wrong!

Physicists announced on Wednesday (9th May, 2018) the results of their unique global experiment that appear to contradict a key worldview embraced by Albert Einstein, a universe independent of human observations in which nothing can travel faster than light.

The experiment, relying on over 100,000 participants with smartphones and other Internet-linked devices, put to test and detected strong violations of Einstein's principle of "local realism," as expected from quantum physics, the laws that govern the subatomic realm.

In the test, scientists generated pairs of "entangled" atoms and photons that were sent to different locations where their properties were measured. The participants contributed to the process of how these particles were measured in 12 laboratories around the world.

If the results of the measurements on the particles agree, scientists say, the implications would be that the measurement of one particle instantly affects the other particle, irrespective of their distance, thus appearing to violate Einstein's speed-of-light barrier.

The other way to explain the results would be to assume that the properties of the particles did not exist at all until the scientists actually measured them - a bizarre idea that challenges common-sensical notions of reality.

Either way, the results contradict Einstein's worldview. The findings were published in the journal Nature on Wednesday.

In the new test, conducted for 12 hours on November 30, 2016, Morgan and his colleagues recruited over 100,000 participants who produced a large supply or random number sequences through a browser-based game called the "Big Bell Quest."

The players were challenged to create unpredictable strings of zeroes and ones that were supplied to the scientists conducting measurements in the 12 labs. The measurements' results "strongly disagree" with Einstein's worldview and once again corroborate violations of local realism.

Physicists from Argentina, Australia, Austria, Brazil, Chile, China, France, Germany, Italy, Spain, Sweden, Switzerland, and the US were part of the experimental consortium. Each of the 12 laboratories designed different experiments to test local realism in different ways.

In this experiment,  different people located at faraway places made random choices and fed them to a network connecting the experimental arrangements. "The choice of each human being ensures randomness, which was not possible earlier with instrumental detectors."

Comment by Dr. Krishna Kumari Challa on May 5, 2018 at 9:04am

Comment by Dr. Krishna Kumari Challa on May 2, 2018 at 5:55am

Thousands boycott new Nature journal about machine learning

More than two thousand researchers have signed a petitionto boycott a new Nature journal over the fact it will be available only by subscription.

Free and open access to knowledge is important in all fields. It is particularly important for students and faculty whose universities cannot afford the subscription fees for closed-access journals or cannot afford to pay (as authors) for their papers to be open access. Open access speeds up scientific progress by enabling anyone anywhere on earth to read the latest research and make their own contributions.

Source: Retraction Watch

We, the people associated with Sci-Art Lab, completely support this initiative. People in the developing countries cannot afford papers behind paywalls. Scientific Knowledge should be provided free of cost and should have open access. 

Comment by Dr. Krishna Kumari Challa on April 20, 2018 at 8:41am

Plants repair their Sun -damaged DNA: If the ultraviolet radiation from the sun damages human DNA to cause health problems, does UV radiation also damage plant DNA? The answer is yes, but because plants can’t come in from the sun or slather on sunblock, they have a super robust DNA repair kit.

Research finds that this powerful DNA repair system in plants closely resembles a repair system found in humans and other animals.

The study, which appears in Nature Communications, is the first repair map of an entire multicellular organism. It revealed that the “nucleotide excision repair” system works much more efficiently in the active genes of plants as compared to humans. And this efficiency depends on the day/night cycle.

Excision repair,  is now widely viewed as the major mechanism of DNA repair—including repair of UV damage—in living organisms. 

The researchers performed XR-seq scans on cells from UV-exposed plants—Arabidopsis thaliana, the “lab rat” of plant research also known as thale cress or mouse-ear cress. The resulting repair maps revealed that excision repair in Arabidopsis works faster on genes that are active. Genes when active are transcribed into strands of RNA that may then be translated into proteins, the main machinery of cells. Prior studies from the Sancar lab showed that excision repair works more efficiently for actively transcribed genes in animals and bacteria. The phenomenon, called transcription-coupled repair, is thought to have evolved as a way to direct DNA repair where it is most acutely needed.

The researchers performed XR-seq on UV-exposed Arabidopsis over 24-hour periods to discover that the efficiency of transcription-coupled repair also varies according to the “circadian” day/night cycle for 10 to 30 percent of Arabidopsis‘s genes. This reflects the normal daily variations of transcription activity in these genes.

https://www.nature.com/articles/s41467-018-03922-5

Comment by Dr. Krishna Kumari Challa on April 20, 2018 at 6:58am

Plants repair their Sun -damaged DNA: If the ultraviolet radiation from the sun damages human DNA to cause health problems, does UV radiation also damage plant DNA? The answer is yes, but because plants can’t come in from the sun or slather on sunblock, they have a super robust DNA repair kit.

Research finds that this powerful DNA repair system in plants closely resembles a repair system found in humans and other animals.

The study, which appears in Nature Communications, is the first repair map of an entire multicellular organism. It revealed that the “nucleotide excision repair” system works much more efficiently in the active genes of plants as compared to humans. And this efficiency depends on the day/night cycle.

Excision repair,  is now widely viewed as the major mechanism of DNA repair—including repair of UV damage—in living organisms. 

The researchers performed XR-seq scans on cells from UV-exposed plants—Arabidopsis thaliana, the “lab rat” of plant research also known as thale cress or mouse-ear cress. The resulting repair maps revealed that excision repair in Arabidopsis works faster on genes that are active. Genes when active are transcribed into strands of RNA that may then be translated into proteins, the main machinery of cells. Prior studies from the Sancar lab showed that excision repair works more efficiently for actively transcribed genes in animals and bacteria. The phenomenon, called transcription-coupled repair, is thought to have evolved as a way to direct DNA repair where it is most acutely needed.

The researchers performed XR-seq on UV-exposed Arabidopsis over 24-hour periods to discover that the efficiency of transcription-coupled repair also varies according to the “circadian” day/night cycle for 10 to 30 percent of Arabidopsis‘s genes. This reflects the normal daily variations of transcription activity in these genes.

https://www.nature.com/articles/s41467-018-03922-5

Comment by Dr. Krishna Kumari Challa on April 19, 2018 at 8:25am

Evidence of a planet getting destroyed in our solar system...

An asteroid that slammed into the Sudan desert on Oct. 7, 2008, shot out lots of little space rocks holding a precious secret: diamonds that likely formed billions of years ago inside the embryo of a now-decimated planet.

That lost planet was the size of Mercury or perhaps Mars, researchers now say.

An asteroid that slammed into the Sudan desert on Oct. 7, 2008, shot out lots of little space rocks holding a precious secret: diamonds that likely formed billions of years ago inside the embryo of a now-decimated planet.

That lost planet was the size of Mercury or perhaps Mars, researchers now say.

In the space rocks, which are also called meteorites, researchers found compounds common to diamonds on Earth, such as chromite, phosphate and iron-nickel sulfides. It's the first time these diamond components have been found in an extraterrestrial body, the researchers said in a new study describing the findings.

The finding provides more information on the early days of our solar system about 4.4 billion years ago, when the zone near the sun had several planetary embryos. Many of them coalesced into the planets we see today. Others fell into the sun or were ejected into interstellar space.

The meteorites were formed after an asteroid slammed into Earth's atmosphere — making it technically a meteor — exploding 23 miles (37 kilometers) above the Nubian Desert in Sudan. The explosion from the 13-foot-wide (4 meters) body shot fragments all over the desert below. Researchers picked up 50 of these pieces, which ranged in size from 0.4 to 4 inches (1 to 10 centimeters).

Researchers collected these tiny meteorites into a collection called "Almahata Sitta"; this is the Arabic word for "Station Six," a train station nearby the meteorite fall and between Wadi Halfa and Khartoum. After collecting the tiny meteorites, researchers discovered nano-size diamonds inside them. But at first, the origins of the diamonds eluded researchers.

Nanodiamonds can form from "normal" static pressure inside a large parent body like Earth, but there are other origin theories as well. High-energy collisions between worlds in space can leave such diamonds behind, as can deposition by chemical vapor,according to a statement from the Federal Polytechnic School of Lausanne in Switzerland.

The new study, however, revealed that the diamonds in the meteorite could form only under pressures higher than 20 gigapascals. This is an extremely high form of pressure that humans can generate with certain explosives.

"This level of internal pressure can only be explained if the planetary parent body was a Mercury- to Mars-sized planetary 'embryo,' depending on the layer in which the diamonds were formed," the researchers said 

That planetary embryo would have then been destroyed through violent collisions, the researchers noted.

The research was published online (April 17) in the journal Nature Communications.

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