Science – Page 6 – artdiamondblog.com

Iceland Project Turns 95% of Carbon Dioxide into Calcite Rock

(p. A6) For years, scientists and others concerned about climate change have been talking about the need for carbon capture and sequestration.
. . .
Among the concerns about sequestration is that carbon dioxide in gaseous or liquid form that is pumped underground might escape back to the atmosphere. So storage sites would have to be monitored, potentially for decades or centuries.
But scientists at Lamont-Doherty Earth Observatory at Columbia University and other institutions have come up with a different way to store CO2 that might eliminate that problem. Their approach involves dissolving the gas with water and pumping the resulting mixture — soda water, essentially — down into certain kinds of rocks, where the CO2 reacts with the rock to form a mineral called calcite. By turning the gas into stone, scientists can lock it away permanently.
One key to the approach is to find the right kind of rocks. Volcanic rocks called basalts are excellent for this process, because they are rich in calcium, magnesium and iron, which react with CO2.
Iceland is practically all basalt, so for several years the researchers and an Icelandic utility have been testing the technology on the island. The project, called CarbFix, uses carbon dioxide that bubbles up naturally with the hot magma that powers a geothermal electrical generating plant 15 miles east of the capital, Reykjavik.
. . .
Early signs were encouraging: . . .
. . .
The scientists found that about 95 percent of the carbon dioxide was converted into calcite. And even more important, they wrote, the conversion happened relatively quickly — in less than two years.
“It’s beyond all our expectations,” said Edda Aradottir, who manages the project for the utility, Reykjavik Energy.
. . .
. . . the researchers say that there is enough porous basaltic rock around, including in the ocean floors and along the margins of continents.

For the full story, see:
HENRY FOUNTAIN. “Project in Iceland for Storing Carbon Shows Promise.” The New York Times (Fri., June 10, 2016): A6.
(Note: ellipses added.)
(Note: the online version of the story has the date JUNE 9, 2016, and has the title “Iceland Carbon Dioxide Storage Project Locks Away Gas, and Fast.”)

The research mentioned above was detailed in an academic paper in Science:
Matter, Juerg M., Martin Stute, Sandra Ó Snæbjörnsdottir, Eric H. Oelkers, Sigurdur R. Gislason, Edda S. Aradottir, Bergur Sigfusson, Ingvi Gunnarsson, Holmfridur Sigurdardottir, Einar Gunnlaugsson, Gudni Axelsson, Helgi A. Alfredsson, Domenik Wolff-Boenisch, Kiflom Mesfin, Diana Fernandez de la Reguera Taya, Jennifer Hall, Knud Dideriksen, and Wallace S. Broecker. “Rapid Carbon Mineralization for Permanent Disposal of Anthropogenic Carbon Dioxide Emissions.” Science 352, no. 6291 (June 10, 2016): 1312-14.

New Technology Reveals Huge Helium Supplies

(p. A8) Helium’s role in superconductivity and other applications has grown so much that there have been occasional shortages. The gas forms in nature through radioactive decay of uranium and thorium, but exceedingly slowly; in practical terms, all the helium we will ever have already exists. And because it does not react with anything and is light, it can easily escape to the atmosphere.
. . .
But now scientists have figured out a way to explore specifically for helium. Using their techniques, they say, they have found a significant reserve of the gas in Tanzania that could help ease concerns about supplies.
. . .
Working with scientists from the University of Oxford and a small Norwegian start-up company called Helium One, the researchers prospected in a part of Tanzania where studies from the 1960s suggested helium might be seeping from the ground. The area is within the East African Rift, a region where one of Earth’s tectonic plates is splitting. The rifting has created many volcanoes.
Dr. Gluyas said the gas discovered in Tanzania may be as much as 10 percent helium, a huge proportion compared with most other sources. The researchers say the reservoir might contain as much as 54 billion cubic feet of the gas, or more than twice the amount currently in the Federal Helium Reserve, near Amarillo, Tex., which supplies about 40 percent of the helium used in the United States and is being drawn down.
The next step would be for Helium One or one of the major helium suppliers around the world to exploit the find.

For the full story, see:
HENRY FOUNTAIN. “A New Way to Search Out Elusive Helium.” The New York Times (Weds., JUNE 29, 2016): A8.
(Note: ellipsis added.)
(Note: the online version of the story has the date JUNE 28, 2016, and has the title “Scientists Devise New Way to Find an Elusive Element: Helium.”)

Majerus Did Not Need a Randomized Trial to Know that Aspirin Prevents Heart Attacks

(p. A21) Philip W. Majerus, a biochemist who was credited as being the first to theorize that taking small doses of aspirin regularly can prevent heart attacks and strokes in vulnerable patients, died last Wednesday [June 8, 2016] at his home in St. Louis. . . .
. . .
Even before his findings were confirmed in a study by other researchers a decade later, Dr. Majerus was taking aspirin daily.
“I was already convinced that aspirin prevented heart attacks,” he recalled in the journal Advances in Biological Regulation in 2014. “I was unwilling to be randomized into a trial where I might end up with the placebo. I refused to participate.”
Dr. Majerus recommended that “all adults should take an aspirin daily unless they are among the few percent of the population that cannot tolerate the drug.” The cardiovascular benefit of aspirin was fully achieved by 50 to 75 milligrams daily, he said, and “there is no evidence that branded aspirin, which is much more expensive, is in any way superior to the generic version.”
Later studies found that for people in their 50s who are vulnerable to heart disease, taking daily doses of aspirin reduces the risk of heart disease.
. . .
Investigating how aspirin inhibited clotting, Dr. Majerus concluded that the medicine modified an enzyme that leads to the formation of a platelet-made molecule that constricts blood vessels and aggregates platelets. The pills’ effect lasts for the platelets’ life span, typically about two weeks.
“Phil Majerus, more than any other individual, has produced the most original body of work on biochemistry of platelets as it relates to thrombosis,” Prof. Joseph L. Goldstein, a Nobel laureate at the University of Texas Southwestern Medical Center in Dallas, said when the Bristol-Myers Squibb Award was announced.

For the full obituary, see:
SAM ROBERTS. “Dr. Philip Majerus, Who Recognized Heart Benefits of Aspirin, Is Dead at 79.” The New York Times (Weds., JUNE 15, 2016): A23.
(Note: ellipses, and bracketed date, added.)
(Note: the online version of the obituary has the date JUNE 14, 2016, and has the title “Dr. Philip Majerus, Who Discerned Aspirin’s Heart Benefits, Dies at 79.”)

Details of a Case of Gene Transfer Between Species

(p. A7) . . . in recent years, scientists have pinpointed many instances of horizontal gene transfer–genes being ferried from one species into an entirely unrelated species that happens to live in the same environment.
For example, a gene from a species of bacteria has been discovered in the genome of the coffee berry borer beetle, where it enables the beetle to feed exclusively on coffee beans. It is through horizontal gene transfer that bacteria typically develop antibiotic resistance.
A few months ago, a team of U.K. researchers concluded that the “jumping gene” method enabled humans to acquire more than 145 foreign genes from bacteria, viruses and fungi over the course of our evolution.
The big mystery is: How does this happen? In the latest study, researchers suggest a possible route whereby the genes of parasitic wasps jump into the genomes of butterflies and moths.

For the full story, see:
GAUTAM NAIK. “Scientists Find How Genes Jump Species.” The Wall Street Journal (Fri., Sept. 18, 2015): A7.
(Note: ellipsis added.)
(Note: the online version of the story has the date Sept. 17, 2016, and has the title “Scientists Learn How Genes Can Jump Between Species.”)

The academic paper reporting the possible details of a process of horizontal gene transfer, is:
Gasmi, Laila, Helene Boulain, Jeremy Gauthier, Aurelie Hua-Van, Karine Musset, Agata K. Jakubowska, Jean-Marc Aury, Anne-Nathalie Volkoff, Elisabeth Huguet, Salvador Herrero, and Jean-Michel Drezen. “Recurrent Domestication by Lepidoptera of Genes from Their Parasites Mediated by Bracoviruses.” PLoS Genetics 11, no. 9 (Sept. 17, 2015): e1005470.

If Rapamycin Works in Humans as in Mice, We Gain 20 Years in Good Health

“Dr. Matt Kaeberlein, a biology of aging researcher, with his dog Dobby in North Bend, Wash. He helped fund a drug study using his own money.” Source of caption: p. A12 of print version of the NYT article quoted and cited below. Source of photo: online version of the NYT article quoted and cited below.

(p. A12) But scientists who champion the study of aging’s basic biology — they call it “geroscience” — say their field has received short shrift from the biomedical establishment. And it was not lost on the University of Washington researchers that exposing dog lovers to the idea that aging could be delayed might generate popular support in addition to new data.
“Many of us in the biology of aging field feel like it is underfunded relative to the potential impact on human health this could have,” said Dr. Kaeberlein, who helped pay for the study with funds he received from the university for turning down a competing job offer. “If the average pet owner sees there’s a way to significantly delay aging in their pet, maybe it will begin to impact policy decisions.”
The idea that resources might be better spent trying to delay aging rather than to cure diseases flies in the face of most disease-related philanthropy and the Obama administration’s proposal to spend $1 billion on a “cancer moonshot.” And many scientists say it is still too unproven to merit more investment.
The National Institutes of Health has long been organized around particular diseases, including the National Cancer Institute and the National Institute of Diabetes and Digestive and Kidney Diseases. There is the National Institute on Aging, but about a third of its budget last year was directed exclusively to research on Alzheimer’s disease, and its Division of Aging Biology represents a tiny fraction of the N.I.H.’s $30 billion annual budget. That is, in part, because the field is in its infancy, said the N.I.H. director, Dr. Francis Collins.
. . .
“The squirrels in my neighborhood have a 25-year life span, but they look like rats that live two years,” said Gary Ruvkun, a pioneer in aging biology at Harvard Medical School. “If you look at what nature has selected for and allowed, it suggests that you might be able to get your hands on the various levers that change things.”
. . .
Over 1,500 dog owners applied to participate in the trial of rapamycin, which has its roots in a series of studies in mice, the first of which was published in 2009. Made by a type of soil bacterium, rapamycin has extended the life spans of yeast, flies and worms by about 25 percent.
But in what proved a fortuitous accident, the researchers who set out to test it in mice had trouble formulating it for easy consumption. As a result, the mice were 20 months old — the equivalent of about 60 human years — when the trial began. That the longest-lived mice survived about 12 percent longer than the control groups was the first indication that the drug could be given later in life and still be effective.
Dr. Kaeberlein said he had since achieved similar benefits by giving 20-month-old mice the drug for only three months. (The National Institute on Aging rejected his request for funding to further test that treatment.) Younger mice, given higher doses, have lived about 25 percent longer than those not given the drug, and mice of varying ages and genetic backgrounds have been slower to develop some cancers, kidney disease, obesity and symptoms of Alzheimer’s disease. In one study, their hearts functioned better for longer.
“If you do the extrapolation for people, we’re probably talking a couple of decades, with the expectation that those years are going to be spent in relatively good health,” Dr. Kaeberlein said.
. . .
. . . what dog lovers have long considered the sad fact that their pets age about seven times as fast as they do, Dr. Kaeberlein knew, would be a boon for a study of rapamycin that would have implications for both species. An owner of two dogs himself, he was determined to scrounge up the money for the pilot phase of what he and Dr. Promislow called the Dog Aging Project.
Last month, he reported at a scientific meeting that no significant side effects had been observed in the dogs, even at the highest of three doses. And compared with the hearts of dogs in the control group, the hearts of those taking the drug pumped blood more efficiently at the end. The researchers would like to enroll 450 dogs for a more comprehensive five-year study, but do not yet have the money.
Even if the study provided positive results on all fronts, a human trial would carry risks.
Dr. Kaeberlein, for one, said they would be worth it.
“I would argue we should be willing to tolerate some level of risk if the payoff is 20 to 30 percent increase in healthy longevity,” he said. “If we don’t do anything, we know what the outcome is going to be. You’re going to get sick, and you’re going to die.”

For the full story, see:
AMY HARMON. “CHASING IMMORTALITY; Dogs Test Drug Aimed at Humans’ Biggest Killer: Age.” The New York Times (Tues., MAY 17, 2016): A1 & A12.
(Note: ellipses added.)
(Note: the online version of the story has the date MAY 16, 2016, and has the title “CHASING IMMORTALITY; Dogs Test Drug Aimed at Slowing Aging Process.”)

An academic paper that discusses the wide variability in life span of different species in the order Rodentia (which includes short-lived rats and long-lived squirrels), is:
Gorbunova, Vera, Michael J. Bozzella, and Andrei Seluanov. “Rodents for Comparative Aging Studies: From Mice to Beavers.” Age 30, no. 2-3 (June 25, 2008): 111-19.

Some “Rescue” Groups “Kidnap and Mutilate” Street Dogs

(p. D1) MONTAGUE, Mass. — Think of all the dogs out there: labradors and poodles and labradoodles; huskies and westies and dogues de Bordeaux; pit bulls and spaniels and lovable mutts that go to doggy day care.
Add them up, all the pet dogs on the planet, and you get about 250 million.
But there are about a billion dogs on Earth, according to some estimates. The other 750 million don’t have flea collars. And they certainly don’t have humans who take them for walks and pick up their feces. They are called village dogs, street dogs and free-breeding dogs, among other things, and they haunt the garbage dumps and neighborhoods of most of the world.
In their new book, “What Is a Dog?,” Raymond and Lorna Coppinger argue that if you really want to understand the nature of dogs, you need to know these other animals. The vast majority are not strays or lost pets, the Coppingers say, but rather superbly adapted scavengers — the closest living things to the dogs that first emerged thousands of years ago.
. . .
(p. D6) In 2001, their book “Dogs: A Startling New Understanding of Canine Origin, Behavior & Evolution” challenged the way scientists thought about the beginnings of dogs.
They argued against the widely held view that one day a hunter-gatherer grabbed a wolf pup from a den and started a breeding program. Instead, they argued, dogs domesticated themselves.
Some wild canines started hanging around humans for their leftovers and gradually evolved into scavengers dependent on humans. Not everyone in canine science shares that view today, but many researchers think it is the most plausible route to domestication.
. . .
Although the Coppingers recognize the social cost of animals that are unvaccinated and running free, they argue that killing the dogs, as some countries do during rabies epidemics, does not help. It’s impossible to kill them all, and because they breed rapidly, the population quickly rebounds.
Nor do the Coppingers have any sympathy for rescue groups that, as Dr. Coppinger puts it, “kidnap and mutilate” street dogs from the Caribbean and elsewhere to bring them to American shelters to live as pets, “where they are made totally dependent and entirely restricted.” This is supposed to benefit the dogs, but Dr. Coppinger argues that they are taken from a rich social environment, with many dogs, to lives of relative isolation.

For the full story, see:
JAMES GORMAN. “Don’t Call them Strays.” The New York Times (Tues., APRIL 19, 2016): D1 & D6.
(Note: the online version of the story has the date APRIL 18, 2016, and has the title “The World Is Full of Dogs Without Collars.”)

The dog books mentioned above, are:
Coppinger, Raymond, and Lorna Coppinger. What Is a Dog? Chicago: University of Chicago Press, 2016.
Coppinger, Raymond, and Lorna Coppinger. Dogs: A Startling New Understanding of Canine Origin, Behavior & Evolution. New York: Scribner, 2001.

Scientific Knowledge Matters More than Myth Because of Its Practical Effectiveness

(p. C6) Stories matter; knowledge matters more.
“When we talk about the big bang or the fabric of space,” . . . [Carlo Rovelli] writes, “what we are doing is not a continuation of the free and fantastic stories that humans have told nightly around campfires for hundreds of thousands of years.” You might tell a great campfire story about an antelope, he comments. Knowing how to track and kill one is more relevant to survival.
“Myths nourish science, and science nourishes myth,” Mr. Rovelli says. “But the value of knowledge remains. If we can find the antelope, we can eat.”

For the full review, see:
DWIGHT GARNER. “Books of The Times; A Vast Cosmos, Made Bite-Size and Delectable.” The New York Times (Weds., MARCH 23, 2016): C1 & C6.
(Note: ellipsis, and bracketed name, added.)
(Note: the online version of the review has the date MARCH 22, 2016, and has the title “Books of The Times; Review: ‘Seven Brief Lessons on Physics’ Is Long on Knowledge.”)

The book under review, is:
Rovelli, Carlo. Seven Brief Lessons on Physics. New York: Riverhead Books, 2016.

Global Warming Is Producing More Pleasant Weather in United States

(p. 9) CHRISTMAS in New York was lovely this year — especially for those who prefer to spend the day working on their tans. It was the city’s warmest ever, with temperatures peaking at 66 degrees.
Record-breaking temperatures are occurring with alarming frequency in the United States, but Americans are reacting with a collective shrug. In a poll taken in January, after the country’s warmest December on record, the Pew Research Center found that climate change ranked close to last on a list of the public’s policy priorities. Why?
In a paper published on Wednesday [April 20, 2016] in the journal Nature, we provide one possible explanation: For a vast majority of Americans, the weather is simply becoming more pleasant. Over the past four decades, winter temperatures have risen substantially throughout the United States, but summers have not become markedly more uncomfortable.
Of course, people’s preferences about weather vary widely. Some want a snowfall every winter, while others would rather wear sandals year-round. So we sought to develop a measure of the average American’s weather preferences. To do this, we made use of research by economists who study local population growth in the United States. They have found that Americans have been moving to places with warm winters and cool, less humid summers. We made the inference (not true in every case, but reasonable to assume in general) that Americans prefer such conditions.
Then we evaluated the changes in weather conditions that Americans have experienced over the past four decades (i.e., roughly since climate change emerged as an issue in the public sphere). Climatologists customarily report weather changes averaged over the land surface — an approach that counts changes in sparse Montana just as heavily as shifts in populous California. But because we were interested in the typical American’s exposure to weather, we took a different tack, calculating changes over time on a county-by-county basis, weighted by population.
Our findings are striking: 80 percent of Americans now find themselves living in counties where the weather is more pleasant than it was four decades ago.

For the full commentary, see:
PATRICK J. EGAN and MEGAN MULLIN. “Gray Matter; Global Warming Feels Quite Pleasant.” The New York Times (Sun., APRIL 24, 2016): 9.
(Note: bracketed date added.)
(Note: the online version of the commentary has the date APRIL 21, 2016.)

The Nature article mentioned above, is:
Egan, Patrick J., and Megan Mullin. “Recent Improvement and Projected Worsening of Weather in the United States.” Nature 532, no. 7599 (April 21, 2016): 357-60.

Many Empirical Research Results Are False

(p. B7) Research on 100 studies in psychology found in 2015 that more than 60% couldn’t be replicated. Similar results have been found in medicine and economics. Campbell Harvey, a professor at Duke University and president of the American Finance Association, estimates that at least half of all “discoveries” in investment research, and financial products based on them, are false.
. . .
Brian Nosek, a psychology professor at the University of Virginia and executive director of the Center for Open Science, a nonprofit seeking to improve research practices, has spent much of the last decade analyzing why so many studies don’t stand up over time.
Because researchers have an incentive to come up with results that are “positive and clean and novel,” he says, they often test a plethora of ideas, throwing out those that don’t appear to work and pursuing those that confirm their own hunches.
If the researchers test enough possibilities, they may find positive results by chance alone — and may fool themselves into believing that luck didn’t determine the outcomes.

For the full commentary, see:
JASON ZWEIG. “Chasing Hot Returns in ‘Smart-Beta’ Can Be Dumb.” The Wall Street Journal (Sat., Feb 13, 2016): B1 & B7.
(Note: ellipsis added.)
(Note: the online version of the commentary has the date Feb 12, 2016, and has the title “Chasing Hot Returns in ‘Smart-Beta’ Funds Can Be a Dumb Idea.”)

Indian Government Scientists Fight Global Warming by Reducing Cow Belches

(p. A10) Let no one say that India isn’t doing its bit to fight global climate change: Government scientists are working hard to reduce carbon emissions by making cows less flatulent.
Consider the numbers: India is home to more than 280 million cows, and 200 million more ruminant animals like sheep, goats, yaks and buffalo. According to an analysis of satellite data from the country’s space program, all those digestive tracts send 13 million tons of methane into the atmosphere every year — and pound for pound, methane traps 25 times as much heat as carbon dioxide does.
. . .
Scientists at the Cow Research Institute in Mathura, around 100 miles south of New Delhi, are tinkering with cattle feed, seeking a formula that will create less gas for the cows to belch out. (That is how most of it is released, by the way; scientists say much less comes from farting.)
But a team of researchers in the southern state of Kerala is working on a long-term answer.
. . .
. . . dwarf animals, which are about one-quarter the weight of crossbred cows, produce only one-seventh as much manure and one-tenth as much methane.

For the full story, see:
ELLEN BARRY. “What in the World; Cows: India’s Reply to Global Warming.” The New York Times (Thurs., MAY 5, 2016): A10.
(Note: ellipses added.)
(Note: the online version of the story has the date MAY 3, 2016, and has the title “What in the World; India’s Answer to Global Warming; Cows That Belch Less.”)