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Lottie Peppers

Watch Information Flow between Neighboring Cells [Video and Animation] - Scientific Ame... - 0 views

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    In their May 2015 Scientific American article "Cellular Small Talk," Dale W. Laird, Paul D. Lampe and Ross G. Johnson report on recent discoveries showing that the disruption of cellular structures called gap junctions can cause various diseases.
Lottie Peppers

15 Answers to Creationist Nonsense - Scientific American - 0 views

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    The following list rebuts some of the most common "scientific" arguments raised against evolution. It also directs readers to further sources for information and explains why creation science has no place in the classroom.
Lottie Peppers

Cancer Immunotherapy: The Cutting Edge Gets Sharper - Scientific American - 0 views

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    Artificially boosting the body's immune response against cancer is the most exciting advance in the treatment of tumors in the past couple of years. But as the jam-packed sessions at a recent scientific conference in New York City made clear, a lot of questions remain to be answered before anyone can declare victory in the war on cancer. Among them: What is the best way to kick the immune system into action? Will immunotherapy work for all sorts of people with all kinds of cancer or just for a lucky few? Is there a way to make the treatments less dangerous or expensive?
Lottie Peppers

How Elephants Stay Cancer-Free - Scientific American - 0 views

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    Elephants have evolved extra copies of a gene that fights tumour cells, according to two independent studies, offering an explanation for why the animals so rarely develop cancer.
Lottie Peppers

A Simpler Origin for Life - Scientific American - 0 views

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    article summarizing key findings
Lottie Peppers

The Red Hot Debate about Transmissible Alzheimer's - Scientific American - 0 views

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    For Collinge, this led to a worrying conclusion: that the plaques might have been transmitted, alongside the prions, in the injections of growth hormone-the first evidence that Alzheimer's could be transmitted from one person to another. If true, that could have far-reaching implications: the possibility that 'seeds' of the amyloid-β protein involved in Alzheimer's could be transferred during other procedures in which fluid or tissues from one person are introduced into another, such as blood transfusions, organ transplants and other common medical procedures.
Lottie Peppers

How China Is Rewriting the Book on Human Origins - Scientific American - 0 views

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    The tale is further muddled by Chinese fossils analysed over the past four decades, which cast doubt over the linear progression from African H. erectus to modern humans. They show that, between roughly 900,000 and 125,000 years ago, east Asia was teeming with hominins endowed with features that would place them somewhere between H. erectus and H. sapiens, says Wu (see'Ancient human sites'). "Those fossils are a big mystery," says Ciochon. "They clearly represent more advanced species than H. erectus, but nobody knows what they are because they don't seem to fit into any categories we know."
Lottie Peppers

A Possible Cure for "Bubble Boy" Disease Will Cost $665,000--Per Dose - Scientific Amer... - 0 views

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    GlaxoSmithKline has developed what looks like a cure for a rare and deadly disease, and it's going to cost $665,000 for a single dose. That sky-high price tag-more than twice the average price of a house-is likely to stir what's already a long-simmering debate in health care: How much should curative therapies cost, and how should society pay for them?
Lottie Peppers

Drug Resistance May Push Millions into Poverty - Scientific American - 0 views

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    ROME (Thomson Reuters Foundation) - If drug-resistant infections in people and animals are allowed to spread unchecked, some 28 million people will fall into poverty by 2050, and a century of progress in health will be reversed, the World Bank said on Monday. By 2050, annual global GDP would fall by at least 1.1 percent, although the loss could be as much as 3.8 percent - the equivalent of the 2008 financial crisis - the Bank said in a report released ahead of a high-level meeting on the issue at the United Nations in New York this week.
Lottie Peppers

3 Human Chimeras That Already Exist - Scientific American - 0 views

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    The news that researchers want to create human-animal chimeras has generated controversy recently, and may conjure up ideas about Frankenstein-ish experiments. But chimeras aren't always man-made-and there are a number of examples of human chimeras that already exist. A chimera is essentially a single organism that's made up of cells from two or more "individuals"-that is, it contains two sets of DNA, with the code to make two separate organisms.
Lottie Peppers

New "Bionic" Leaf Is Roughly 10 Times More Efficient Than Natural Photosynthesis - Scie... - 0 views

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    Chemist Daniel Nocera of Harvard University and his team joined forces with synthetic biologist Pamela Silver of Harvard Medical School and her team to craft a kind of living battery, which they call a bionic leaf for its melding of biology and technology. The device uses solar electricity from a photovoltaic panel to power the chemistry that splits water into oxygen and hydrogen.
Lottie Peppers

Deadly Bacteria Spread across Oceans as Water Temperatures Rise - Scientific American - 0 views

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    Deadly bacteria are spreading through the oceans as waters warm up, and are increasing infection risks, according to a new study. Multiple species of rod-shaped Vibrio bacteria live in the world's oceans, and their populations rise and fall based on many different variables, changing the likelihood of making people sick.
Lottie Peppers

Neandertal DNA Affects Modern Ethnic Difference in Immune Response - Scientific American - 0 views

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    DNA acquired from breeding with Neanderthals may explain why people of European descent respond differently to infection than those of African descent, two studies suggest. The findings might also offer insight into why people of African descent are more prone to autoimmune diseases caused by an overactive immune system.
Lottie Peppers

Superbug Explosion Triggers U.N. General Assembly Meeting - Scientific American - 0 views

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    The threat of antibiotic resistance has become so dire that the United Nations General Assembly is holding a meeting to discuss it this month in New York City. Although WHO has been sounding the alarm on antibiotic resistance for years, this month's high-level U.N. meeting represents only the fourth time in the international body's history that its General Assembly-a global deliberative body that primarily grapples with issues like war and economics-has held a meeting to tackle a health topic.
Lottie Peppers

How Diversity Makes Us Smarter - Scientific American - 0 views

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    In their words, they found that, on average, "female representation in top management leads to an increase of $42 million in firm value." They also measured the firms' "innovation intensity" through the ratio of research and development expenses to assets. They found that companies that prioritized innovation saw greater financial gains when women were part of the top leadership ranks. Racial diversity can deliver the same kinds of benefits. In a study conducted in 2003, Orlando Richard, a professor of management at the University of Texas at Dallas, and his colleagues surveyed executives at 177 national banks in the U.S., then put together a database comparing financial performance, racial diversity and the emphasis the bank presidents put on innovation. For innovation-focused banks, increases in racial diversity were clearly related to enhanced financial performance.
Lottie Peppers

Butterflies in the Stomach - National Center for Case Study Teaching in Science - 0 views

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    Why is the North American population of monarch butterflies declining? In 1999, a study published in the journal Nature suggested that a variety of genetically modified corn was killing these iconic butterflies. While it was later shown that the conditions in this study did not mirror those in the field, the results garnered a lot of media attention and many people today still believe that monarchs are being killed by GMOs. This case familiarizes students with the plight of the monarchs, encourages them to think about how to test the hypothesis that a toxin is responsible for their decline, and takes a critical look at several studies that investigated the role of Bt corn in the life cycle of monarchs. This interrupted case takes 60-90 min to complete, requires little to no science background, and can be used to explore the ecology and wildlife management of monarchs; risk assessment, toxicity, and exposure; experimental design, the scientific method, hypothesis, and critical thinking; or the relationship between science, the media and the public.
Lottie Peppers

Flower Power: Genetic Modification Could Amply Boost Plants' Carbon-Capture and Bioener... - 0 views

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    Human activities currently add about nine gigatons of carbon to the atmosphere yearly. Photosynthetic organisms on land and in the ocean absorb about five of those gigatons through the natural uptake of CO2, leaving to humans the task of dealing with the rest. But no matter how much carbon there is, capturing it and preventing it from reentering the atmosphere is an immense engineering challenge; even today's best technology is orders of magnitude less effective than photosynthesis at trapping atmospheric carbon.
Lottie Peppers

"Super Bananas" Enter U.S. Market Trials - Scientific American - 0 views

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     In 2005, with the backing of the Bill & Melinda Gates Foundation, Dale began experimenting with ways to add beta-carotene, a nutrient the human body uses to produce vitamin A, to the East African Highland cooking banana, a staple in the Ugandan diet.
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