Your Source of Information: Science

Showing posts with label Science. Show all posts

Friday, July 29, 2022

Earth and Heavens, some timeline, and ALLAH's power over everything

In this video (spoken: Urdu, written: English), Usman Zafar Paracha discusses something about the creation of universe, some points about timelines in the creation, and ALLAH has power over everything. Hope, you will like and share it.

Subscribe to the channel of Official SayPeople by going to the link: https://www.youtube.com/c/officialsaypeople?sub_confirmation=1

Support the work on Patreon: https://www.patreon.com/uzparacha . It could be of significant help and inspiration to move forward and create more content, especially useful and productive content.

Usman Zafar Paracha also likes writing. The app “Quotes by Usman Zafar Paracha” contains the quotations of Usman Zafar Paracha, and it can be downloaded here: https://play.google.com/store/apps/details?id=com.saypeople.usmanquotes

Join Usman Zafar Paracha on Facebook: https://www.facebook.com/usmanzparacha/

On Instagram: https://www.instagram.com/uzparacha

On Twitter: https://twitter.com/UZParacha

On LinkedIn: https://www.linkedin.com/in/usmanzafarparacha/

Sunday, September 26, 2021

Podon ki kuch khasoosiyaat (Urdu)

The word “podoon” means “plants”, “kuch” means “some”, and "khasusiyaat" means "characteristics". So, this title means "some characteristics of plants". This video (in Urdu) relates to some interesting characteristics of plants. Hope, you will like and share it.

Subscribe to the channel of Official SayPeople by going to the link: https://www.youtube.com/c/officialsaypeople?sub_confirmation=1

Support the work on Patreon: https://www.patreon.com/uzparacha . It could be of significant help and inspiration to move forward and create more content, especially useful and productive content.

Join Usman Zafar Paracha on Facebook: https://www.facebook.com/usmanzparacha/

On Instagram: https://www.instagram.com/uzparacha

On Twitter: https://twitter.com/UZParacha

On LinkedIn: https://www.linkedin.com/in/usmanzafarparacha/

Tuesday, December 17, 2013

Antibacterial soap is not that effective as said

U.S. Government has noted after about four decades of study and debates on Monday that chemicals in many antibacterial soaps and cleaning products — used daily in homes, schools and elsewhere — may not work against bacteria and may result in health risks by making humans resistant to antibiotics.

From FDA’s site,

In fact, there currently is no evidence that over-the-counter (OTC) antibacterial soap products are any more effective at preventing illness than washing with plain soap and water, says Colleen Rogers, Ph.D., a lead microbiologist at FDA.

The Food and Drug Administration (FDA) has proposed new rules for the manufacturers of such soaps to prove that they work better than other normal soaps and water or they have to reformulate products.

From FDA’s site,

The agency issued a proposed rule on Dec. 16, 2013 that would require manufacturers to provide more substantial data to demonstrate the safety and effectiveness of antibacterial soaps. The proposed rule covers only those consumer antibacterial soaps and body washes that are used with water. It does not apply to hand sanitizers, hand wipes or antibacterial soaps that are used in health care settings such as hospitals.

Experts are of opinion that many of such products would soon disappear from store shelves.

Monday, December 16, 2013

Pregnant women are not confused about the spaces around them

Main Point:

Scientists have found that pregnant women can equally judge the space around them as other people such passing through the doorways.

Published in:

Attention, Perception, & Psychophysics

Study Further:

In the present study, researchers worked with 11 women during their course of pregnancies and found that the changing body shapes don’t affect the spatial judgments. This good judgment is attributed to a process called as perceptual-motor recalibration that helps people to adjust themselves according to the changing body shapes and sizes.

The possibilities to perform certain actions are shown by the balance between the body and environment, and are known as “affordances”. Affordances usually occur in the person’s life and change, when the body changes relative to the environment.

“Pregnant women accurately perceived the space needed to accommodate their growing bodies,” wrote Franchak, who stated that changes to the body must be considered with respect to a task and an environment, and what is possible to perform or not.

“The experience of weight gain or weight loss likely operates similarly to pregnancy— experience might be necessary to facilitate recalibration to changes in body size and compression, in other words, how much the body can be 'squeezed' to fit through a specific opening,” added Adolph.

“These findings indicate that experience facilitates perceptual–motor recalibration for certain types of actions,” Researchers wrote.

Related Article on SayPeople.com - Minimum time of Pregnancy (http://goo.gl/ESekJW)

Sources:

Life’s not a squeeze for pregnant women - AlphaGalileo (http://goo.gl/6DKWSH)

Gut estimates: Pregnant women adapt to changing possibilities for squeezing through doorways - Attention, Perception, & Psychophysics (http://goo.gl/43Ti06)

New method is relatively easy and efficient to produce hydrogen from water / Related Research Suggestions

Main Point:

Scientists have found a quick method of generating hydrogen from water using a catalyst in the presence of sunlight.

Published in:

Nature Nanotechnology

Study Further:

In the present study, scientists used cobalt oxide nanoparticles to break water molecules into hydrogen and oxygen.

According to Jiming Bao, lead author of the paper and an assistant professor in the Department of Electrical and Computer Engineering at UH, this is the first experiment to use cobalt oxide and the first to use neutral water under visible light at high energy conversion efficiency.

Nanoparticles for the present study were prepared in two ways, i.e. femtosecond laser ablation and through mechanical ball milling, and nanoparticles prepared through both ways worked well. Moreover, different sources of light were used including laser, white light simulating solar spectrum and natural sunlight.

The experiment worked equally well in the presence of sunlight and nanoparticles, hydrogen and oxygen were separated almost immediately from water. However, one of the problems in this process is the reduced lifespan of cobalt oxide nanoparticles that became deactivated after about an hour of reaction.

Research Suggestions:

Although the results were commendable in this study but the conversion rate is still too low with a solar-to-hydrogen efficiency rate of about 5% that it cannot be used commercially at this time. According to Bao, better efficiency rate would be nearly 10%, i.e. 10% of solar energy would result in hydrogen chemical energy. You can work to improve the efficiency of this process.

Among the other research suggestions are reducing the cost of the process and increased the lifespan of cobalt oxide nanoparticles.

Sources:

Researchers split water into hydrogen, oxygen using light, nanoparticles - EurekAlert (http://goo.gl/2Wg8hw)

Efficient solar water-splitting using a nanocrystalline CoO photocatalyst - Nature Nanotechnology (http://goo.gl/OmtVBu)

Tuesday, July 9, 2013

Huge amount of cold molecules and dust in the remnant of Supernova 1987A

(This article has been cross-posted from SayPeople.com)

Hubble Space Telescope image of supernova 1987A. The keyhole-like shape at the center is the remnant of supernova explosion 1987A. This remnant is still expanding. It is believed that the surrounding ring was formed before the explosion. // ESA/NASA/P. Challis and R. Kirshner

Main Point:

Astronomers have found a huge amount of cold molecules and dust grains in the supernova remnant - Supernova 1987A that surprised them.

Study Further:

Supernova 1987A was reported after an explosion of a massive star in the year 1987. That star was found in the nearby galaxy, the Large Magellanic Cloud located about 170,000 light-years away. According to astronomers, the supernova released about thousand million times more energy than the energy emitted by the Sun in one year.

Recently, astronomers used the Herschel Space Observatory and Atacama Large Millimeter/Submillimeter Array (ALMA) to study the supernova remnant and found huge amount of cold molecules and dust.

"The powerful explosion we saw in 1987 scattered elements made by the star into space in the form of a very hot plasma,” Mikako Matsuura from University College London, said in a statement. “The gas has now cooled down to temperatures between –250° to –170° Celsius [–420° to –275° Fahrenheit]. That's surprisingly cold, comparable to the icy surface of Pluto at the edge of our solar system. The gas has formed molecules and some have even condensed into solid grains of dust. The supernova has now become a super freezer!"

According to the observations, dust and solid material produced by the supernova was about 250,000 times the mass of Earth, or three-quarters of the mass of the Sun.

"We were surprised by the amount of dust and molecular gas in the reservoir created by the Supernova 1987A,” said Matsuura. “The ALMA and Herschel observations show that the reservoir contains carbon monoxide molecules equaling one-tenth the mass of the Sun. Herschel shows that the dust mass was even larger — about half the solar mass!"

"We don't get many opportunities to study supernovae. These events are very rare and the majority was found in very distant galaxies,” said Matsuura. “Even with relatively close ones, like 1987A, it's difficult. Although they are very bright at the time of the explosion, the light from the supernovae fades very quickly making it very difficult to observe them a few years after the explosion. Carl Sagan once said that: 'We are all made of star-stuff.' These results will help us understand how that material reached us!"