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Keyword: chemistry

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  • New Technique to Search for Life, Whether or not it’s Similar to Earth Life

    06/06/2021 5:13:47 PM PDT · by LibWhacker · 10 replies
    Universe Today ^ | 6/6/2021 | Matt Williams
    In 1960, the first survey dedicated to the Search for Extraterrestrial Intelligence (SETI) was mounted at the Green Bank Observatory in West Virginia. This was Project Ozma, which was the brainchild of famed astronomer and SETI pioneer Frank Drake (for whom the Drake Equation is named). Since then, the collective efforts to find evidence of life beyond Earth have coalesced to create a new field of study known as astrobiology. The search for extraterrestrial life has been the subject of renewed interest thanks to the thousands of exoplanets that have been discovered in recent years. Unfortunately, our efforts are still...
  • New study discovers ancient meteoritic impact over Antarctica 430,000 years ago

    03/31/2021 11:43:27 AM PDT · by Red Badger · 17 replies
    https://phys.org ^ | MARCH 31, 2021 | by University of Kent
    A research team of international space scientists, led by Dr. Matthias van Ginneken from the University of Kent's School of Physical Sciences, has found new evidence of a low-altitude meteoritic touchdown event reaching the Antarctic ice sheet 430,000 years ago. Extra-terrestrial particles (condensation spherules) recovered on the summit of Walnumfjellet (WN) within the Sør Rondane Mountains, Queen Maud Land, East Antarctica, indicate an unusual touchdown event where a jet of melted and vaporized meteoritic material resulting from the atmospheric entry of an asteroid at least 100 m in size reached the surface at high velocity. This type of explosion caused...
  • Use of Antimony trifluoride in Swarts reaction!

    03/16/2021 2:37:08 AM PDT · by jackplanck · 20 replies
    Hey guys, I am currently studying organic chemistry specifically swarts reaction. I just wanted to know why do we use only Antinomy trifluoride or swarts reagent in the swarts reaction. I tried searching but couldn't find a good explanation. It is not even mentioned in most of the articles like the article I have linked. It would help me a lot if someone can help me out
  • Artificial Intelligence Solves Schrödinger’s Equation, a Fundamental Problem in Quantum Chemistry

    01/02/2021 8:54:00 PM PST · by BenLurkin · 79 replies
    SciTechDaily ^ | January 2, 2021 | Freie Universität Berlin
    Central to both quantum chemistry and the Schrödinger equation is the wave function – a mathematical object that completely specifies the behavior of the electrons in a molecule. The wave function is a high-dimensional entity, and it is therefore extremely difficult to capture all the nuances that encode how the individual electrons affect each other. Many methods of quantum chemistry in fact give up on expressing the wave function altogether, instead attempting only to determine the energy of a given molecule. This however requires approximations to be made, limiting the prediction quality of such methods. Other methods represent the wave...
  • The True Origins of Gold in Our Universe May Have Just Changed, Again

    09/16/2020 2:19:00 PM PDT · by MtnClimber · 70 replies
    Science Alert ^ | 15 Sep, 2020 | MICHELLE STARR
    When humanity finally detected the collision between two neutron stars in 2017, we confirmed a long-held theory - in the energetic fires of these incredible explosions, elements heavier than iron are forged. And so, we thought we had an answer to the question of how these elements - including gold - propagated throughout the Universe. But a new analysis has revealed a problem. According to new galactic chemical evolution models, neutron star collisions don't even come close to producing the abundances of heavy elements found in the Milky Way galaxy today. "Neutron star mergers did not produce enough heavy elements...
  • There’s too much gold in the universe. No one knows where it came from

    10/01/2020 9:43:14 PM PDT · by BenLurkin · 62 replies
    Live Science ^ | 01 October 2020 | Rafi Letzter
    Gold is an element, which means you can't make it through ordinary chemical reactions — though alchemists tried for centuries. To make the sparkly metal, you have to bind 79 protons and 118 neutrons together to form a single atomic nucleus. That's an intense nuclear fusion reaction. But such intense fusion doesn't happen frequently enough, at least not nearby, to make the giant trove of gold we find on Earth and elsewhere in the solar system. And a new study has found the most commonly-theorized origin of gold — collisions between neutron stars — can't explain gold's abundance either. So...
  • U.S. puts Iowa meth kingpin to death in 3rd federal execution this week

    07/17/2020 3:50:53 PM PDT · by BenLurkin · 17 replies
    ktla ^ | 07/17/2020
    While out on bond in his drugs case in July 1993, Honken and his girlfriend Angela Johnson kidnapped Lori Duncan and her two daughters from their Mason City, Iowa, home, then killed and buried them in a wooded area nearby. Ten-year-old Kandi and 6-year-old Amber were still in their swimsuits on the hot summer day when they were shot execution-style in the back of the head. Their primary target that day was Lori Duncan’s then-boyfriend, Greg Nicholson, who also lived at the home and was also killed. He and Lori Duncan were bound and gagged and shot multiple times. Honken...
  • Harvard professor charged with hiding China ties

    01/28/2020 12:21:40 PM PST · by Renkluaf · 11 replies
    AP News ^ | 1/28/20 | ALANNA DURKIN RICHER
    BOSTON (AP) — A Harvard University professor has been c harged with lying about his ties to a Chinese-run recruitment program and concealing payments he received from the Chinese government for research, federal officials said Tuesday. Charles Lieber, chair of the department of chemistry and chemical biology, is accused of hiding his involvement in China’s Thousand Talents Plan, a program designed to recruit people with access to and knowledge of foreign technology and intellectual property.
  • Scientists capture the first footage of ATOMS bonding and breaking in real time at a scale half-a-million-times smaller than the width of a human hair

    01/21/2020 2:00:14 PM PST · by C19fan · 37 replies
    UK Daily Mail ^ | January 21, 2020 | Jonathan Chadwick
    Scientists have captured the first ever footage of atoms bonding at a scale around half a million times smaller than the width of a human hair. Using advanced microscopy methods, the team of UK and German researchers captured the breaking of a chemical bond between two rhenium atoms. The video shows the two atoms to the left of the footage, between 0.1 and 0.3 nanometres, appearing as black blobs as they bond and break. Atoms are ‘the building blocks of the world’ and the matter around us is made up of layers and layers of atoms – unless they’re a...
  • Radioactive Scare in North London

    09/07/2006 9:59:28 AM PDT · by gopwinsin04 · 61 replies · 1,958+ views
    A Channel News (Canada) ^ | 9.6.06 | Julie Simpson
    The search continued today for a missing London woman after a strange series of events which led to the stunning discovery of radioactive materials iher north end home last night. ( Sept 5th ). Police have been scouring the city's north end and have even brought in a helicopter to help in the search for 68 year old Annette Serdarevich who suffers from dementia. The area around 1643 Kathryn Ave. was shut down for most of the night as the hazardous materials unit responded to a level three emergency - the most serious type. During a search of the premises,...
  • The Statement of Chemistry on the Origin of Life

    11/26/2017 6:49:57 AM PST · by Kaslin · 183 replies
    American Thinker.com ^ | September 26, 2017 | James Clinton
    In his August 1954, Scientific American article, "The Origin of Life," Nobel Prize winning Harvard Biologist George Wald stated, "One only has to contemplate the magnitude of this task to concede that the spontaneous generation of a living organism is impossible. Yet here we are as a result, I believe, of spontaneous generation." What is "the magnitude of this task" that reasonably renders a natural origin of life "impossible?" Dr. Wald states, "In the vast majority of processes in which we are interested the point of equilibrium lies far over toward the side of dissolution. That is to say, spontaneous...
  • Oklahoma councilwoman: Rename street honoring ex-KKK member

    03/26/2017 9:31:09 PM PDT · by Olog-hai · 15 replies
    Associated Press ^ | Mar 26, 2017 1:07 PM EDT
    A city councilwoman is asking homeowners in an Oklahoma college town to rename a street honoring a prominent former university professor and Ku Klux Klan member. Norman Councilwoman Breea Clark has posted an online petition asking residents to help change the name of DeBarr Avenue. If at least three-fourths of Norman homeowners agree, the city — home to the University of Oklahoma — would be among several cities nationwide renaming monuments and streets named after prominent KKK members. […] The block-long street honors Edwin DeBarr, one of the university’s first professors and founder of its chemistry department. DeBarr became a...
  • 'Tennessine' acknowledges state institutions' roles in element's discovery

    12/02/2016 4:39:37 AM PST · by bert · 20 replies
    Oak Ridge National Laboratory ^ | November 30, 2016 | Bill Cabbage
    The recently discovered element 117 has been officially named "tennessine" in recognition of Tennessee’s contributions to its discovery, including the efforts of the Department of Energy's Oak Ridge National Laboratory and its Tennessee collaborators at Vanderbilt University and the University of Tennessee. "The presence of tennessine on the Periodic Table is an affirmation of our state's standing in the international scientific community, including the facilities ORNL provides to that community as well as the knowledge and expertise of the laboratory's scientists and technicians," ORNL Director Thom Mason said.
  • ACADEMIC ABSURDITY OF THE WEEK: FEMINIST CHEMISTRY?

    08/15/2016 12:30:53 PM PDT · by C19fan · 30 replies
    Hot Air ^ | August 15, 2016 | Steven Hayward
    Did you know there is an International Journal for Philosophy of Chemistry? Neither did I, but of course it exists, for there really is no crazy identity politics “intersection” that doesn’t have its own journal read by dozens. The IJPC recently offered up a two-part article on “Gender in the Substance of Chemistry,” by Agnes Kovacs, who you will be unsurprised to learn is a professor of gender studies at Central European University in Hungary. Part 1 considers “the ideal gas,” which will certainly prompt a number of obvious suggestions from our regular commenters:
  • How is Ammonium chloride different that mixing ammonia and chlorine?

    08/13/2016 10:53:00 AM PDT · by rey · 33 replies
    I know never to mix cleaners and to certainly never mix ammonia and chlorine but many cleaners contain ammonium chloride. Is this not essentially ammonia and chlorine? If not, how does it differ? If it is similar, what is done to it so it doesn't kill the user? I am obviously not a chemist and have merely an nodding acquaintance with the periodic table, so I would ask that your explanations be simplified as much as possible, as Einstein said, "As simple as possible but no simpler." Thanks
  • Science Saturday: A Little Hydrogen Bonding

    03/19/2016 7:40:20 AM PDT · by NOBO2012 · 7 replies
    Michelle Obama's Mirror ^ | 3-19-2016 | MOTUS
    I see that a new type of hydrogen bond has been discovered.  Series HHNo, not a Wall Street instrument, some kind of new-fangled chemistry discovery: An entirely new class of hydrogen bond that forms between a boron–hydrogen group and the aromatic, π-electron system of a benzene ring has been discovered. – Chemistry World I can’t even pretend to know what that means. Maybe Janice the Elder can help us out.So what’s up in the world of science anyway? First we had to deal with the detection of gravitational waves a few weeks ago and now…new hydrogen bonds! I’m confused by all these...
  • When Will We Reach the End of the Periodic Table?

    02/02/2016 4:29:12 PM PST · by MtnClimber · 78 replies
    Smithsonian ^ | 19 Jan, 2016 | Devin Powell
    Chemistry teachers recently had to update their classroom decor, with the announcement that scientists have confirmed the discovery of four new elements on the periodic table. The as-yet unnamed elements 113, 115, 117 and 118 filled in the remaining gaps at the bottom of the famous chart-a roadmap of matter's building blocks that has successfully guided chemists for nearly a century and a half. The official confirmation, granted by the International Union of Pure and Applied Chemistry (IUPAC), was years in the making, as these superheavy elements are highly unstable and tough to create. But scientists had strong reason to...
  • Chemistry Set

    12/18/2015 10:08:29 AM PST · by rey · 59 replies
    Where can you get a REAL chemistry set like we did in the 60s and earlier?
  • Chemistry Friends Lanthanum chloride hydrate

    08/07/2015 10:07:11 AM PDT · by rey · 15 replies
    I have a water feature I care for at work. This feature has an algae problem. I have put in ridiculous quantities of chlorine and acid with little effect. I believe the problem is due to a compost in the landscaping that is blowing into the feature. I think the compost is high in phosphate and is causing the resistant algae. The chemical store recommends a product that has lanthanum chloride hydrate. I need to know if this is harmful to animals as the owner's dog drinks and goes into this feature. Also, the feature drains into a cow pasture....
  • Breakthrough Molecular 3D Printer Can Print Billions of Possible Compounds

    03/14/2015 9:58:12 PM PDT · by 2ndDivisionVet · 21 replies
    3D Print ^ | March 13, 2015 | Brian Krassenstein
    What will 3D printers ultimately evolve into? No one has a functioning crystal ball in front of them I assume, but a good guess would be a machine which can practically build anything its user desire, all on the molecular, and eventually atomic levels. Sure we are likely multiple decades away from widespread molecular manufacturing, but a group of chemists led by medical doctor Martin D. Burke at the University of Illinois may have already taken a major step in that direction. Burke, who joined the Department of Chemistry at the university in 2005, heads up Burke Laboratories where he...