Tag Archives: university of california

Undocumented, Young Immigrants Face Obstacles, Uncertain Futures

By Guest PostMay 12, 2012Politicsamerican youth, citizenship, dream act, ford foundation, immigration status, irvine, latino youth, leo chavez, nightmare, orange county, roberto gonzales, undocumented, united states, university of california, university of chicago, young adults

Undocumented Latino youth who migrate to the United States face futures clouded by limited rights and the constant fear of deportation, according to a new report from the University of Chicago and the University of California, Irvine.

Many don’t fully realize the constraints of their status until they become older teenagers and young adults, the report finds.

“Rites of passage common to American youth — getting a driver’s license, traveling, working and applying to college — are either denied, unattainable or dangerous to pursue for undocumented immigrants,” said Leo Chavez, professor of anthropology at University of California, Irvine. “It’s at this point that many undocumented Latino youth realize society sees them as discardable, as easily castaway. Yet, rather than merely give up, many become involved in campaigns to change the law.” (more…)

Molecular Spectroscopy Tracks Living Mammalian Cells in Real Time as They Differentiate

By Guest PostMay 2, 2012Scienceals, alzheimer's disease, amino acid residues, apoptosis, bacteria, berkeley lab, carbohydrates, cell change, cell death, children, diabetes, fibroblasts, fluorescent dyes, fourier transform infrared, ftir, function, hans bechtel, hoi ying, hyperspectromicroscopy, ir, kevin loutherback, liang chen, lipids, macular degeneration, michael martin, mitochondrial diseases, pc12, phosphorylation, phosphorylation process, power plant, protein, rafael gomez sjoberg, retina, san diego, serine, spectromicroscopy, threonine, tyrosine, ultraviolet, university of california, zhao hao

Berkeley Lab scientists demonstrate the promise of synchrotron infrared spectroscopy of living cells for medical applications

Knowing how a living cell works means knowing how the chemistry inside the cell changes as the functions of the cell change. Protein phosphorylation, for example, controls everything from cell proliferation to differentiation to metabolism to signaling, and even programmed cell death (apoptosis), in cells from bacteria to humans. It’s a chemical process that has long been intensively studied, not least in hopes of treating or eliminating a wide range of diseases. But until now the close-up view – watching phosphorylation work at the molecular level as individual cells change over time – has been impossible without damaging the cells or interfering with the very processes that are being examined.

“To look into phosphorylation, researchers have labeled specific phosphorylated proteins with antibodies that carry fluorescent dyes,” says Hoi-Ying Holman of the U.S. Department of Energy’s Lawrence Berkeley National Laboratory (Berkeley Lab). “That gives you a great image, but you have to know exactly what to label before you can even begin.” (more…)

Golden Potential for Gold Thin Films

By Guest PostApril 29, 2012Science1d chain, 2d nanoparticle, 2d sheet, berkeley lab, block, catalysis, co polymer, DNA, gold nanoparticle, joseph kao, microdomain, microtechnology, nanometer, nanoparticle, peter bai, peter ercius, plasmonic metamaterial, plasmonic technology, polymer scientist, polymer supramolecule, scalable nanomanufacturing, semiconductor nanocrystal, solvent evaporation, supramolecular nanocomposites, thin film, three dimensional array, ting xu, uc, university of california, vivian chuang, zhang jiang

Berkeley Lab Researchers Direct the Self-Assembly of Gold Nanoparticles into Device-Ready Thin films

Scientists with the Lawrence Berkeley National Laboratory (Berkeley Lab) and the University of California (UC) Berkeley have directed the first self-assembly of nanoparticles into device-ready materials. Through a relatively easy and inexpensive technique based on blending nanoparticles with block co-polymer supramolecules, the researchers produced multiple-layers of thin films from highly ordered one-, two- and three-dimensional arrays of gold nanoparticles. Thin films such as these have potential applications for a wide range of fields, including computer memory storage, energy harvesting, energy storage, remote-sensing, catalysis, light management and the emerging new field of plasmonics.

“We’ve demonstrated a simple yet versatile supramolecular approach to control the 3-D spatial organization of nanoparticles with single particle precision over macroscopic distances in thin films,” says polymer scientist Ting Xu, who led this research. “While the thin gold films we made were wafer-sized, the technique can easily produce much larger films, and it can be used on nanoparticles of many other materials besides gold.” (more…)

Guidelines for Prostate Screening Widely Ignored, Study Finds

By Guest PostApril 25, 2012Healthberkshire hathaway, blood test, cancer specific mortality, ceo, controversial decision, data, dezheng huo, diagnosis, jim hu, john easton, los angeles, michael drazer, nhis, prostate cancer, prostate specific antigen, psa, psa screening, recommendation, sandip prasad, scott eggener, treatment, university of california, university of chicago, warren buffett

2008 recommendations from federal task force had no impact

New research confirms that the controversial decision by Warren Buffett – the 81-year-old CEO of Berkshire Hathaway – to undergo a blood test screening for prostate cancer despite his age is hardly unusual. Despite recommendations in 2008 from the United States Preventive Services Task Force against testing for prostate cancer in men aged 75 years or older, almost half of men in that age group continue to get screening tests.

In 2005, before the recommendations were released, 43 percent of men age 75 and above elected to take the prostate-specific antigen (PSA) test. In August 2008, the Task Force stated it “recommends against the service,” arguing “there is moderate or high certainty the service has no net benefit or that the harms outweigh the benefits.” (more…)

First Atomic-Scale Real-Time Movies of Platinum Nanocrystal Growth in Liquids

By Guest PostApril 23, 2012Sciencealex zettl, alivisatos zettl collaboration, anisotropic particle, atomic scale, berkeley lab, crystallographic direction, daniel hellebusch, DNA, electron beam, electron microscope, gold tem mesh, grapheme, graphene liquid cells, growth, growth trajectory, jeong yong lee, jong min yuk, jungwon park, kwanpyo kim, liquid, lynn yarris, membrane, metal, michael crommie, movie, nanocrystal, nanometer scale, nanoparticle growth, ncem, paul alivisatos, peter ercius, platinum nanocrystal, protein, real-time, solution, subnanometer resolution, tem grid, transmission electron microscope, university of california

Berkeley Scientists Create Graphene Liquid Cells for Electron Microscopy Studies of Nanocrystal Formation

They won’t be coming soon to a multiplex near you, but movies showing the growth of platinum nanocrystals at the atomic-scale in real-time have blockbuster potential. A team of scientists with the Lawrence Berkeley National Laboratory (Berkeley Lab) and the University of California (UC) Berkeley has developed a technique for encapsulating liquids of nanocrystals between layers of graphene so that chemical reactions in the liquids can be imaged with an electron microscope. With this technique, movies can be made that provide unprecedented direct observations of physical, chemical and biological phenomena that take place in liquids on the nanometer scale. (more…)

Scientists Trace Evolutionary History of What Mammals Eat

By Guest PostApril 17, 2012Nature, Scienceanimal ecology, antelope, bats, big cats, carnivory, cows, darwin, davis, deer, duke university, environmental biology, evolutionary race, evolutionary time, extinct, feeding habit, george gilchrist, herbivory, louise roth, macroevolutionary diversification, mammal, meat, national science foundation, omnivore, plant eater, primates, rabbits, rodents, samantha hopkins, samantha price, ungulates, university of california, university of oregon

*Feeding habits haven’t always been what they are today*

The feeding habits of mammals haven’t always been what they are today, particularly for omnivores.

Some groups of mammals almost exclusively eat meat–take lions and tigers and other big cats as examples.

Other mammals such as deer, cows and antelope are predominantly plant-eaters, living on a diet of leaves, shoots, fruits and bark. (more…)

Fukushima Lesson: Prepare for Unanticipated Nuclear Accidents

By Guest PostMarch 12, 2012Environmentalexandra navrotsky, davis, decontamination, earthquake, edward h kraus, electricity, Environment, fission, fukushima, fukushima daiichi, fukushima reactor, human health, hydrogen gas, Japan, japanese government, knowledge, magnitude, nuclear fuels, nuclear power plant, nuclear waste, peter burns, radiation, radioactive fallout, rehabilitation, rodney ewing, seawater, tepco, tsunami, university of california, university of michigan, university of notre dame, uranium dioxide, zirconium alloy

ANN ARBOR, Mich.— A year after the crisis at Japan’s Fukushima Daiichi nuclear power plant, scientists and engineers remain largely in the dark when it comes to fundamental knowledge about how nuclear fuels behave under extreme conditions, according to a University of Michigan nuclear waste expert and his colleagues.

In a review article in this week’s edition of the journal Science, U-M’s Rodney Ewing and two colleagues call for an ambitious, long-term national research program to study how nuclear fuels behave under the extreme conditions present during core-melt events like those that occurred at Fukushima following the March 11, 2011, magnitude 9.0 earthquake and tsunami. (more…)

Responding to the Radiation Threat

By Guest PostMarch 7, 2012Environment, Scienceactinides, actinium, berkeley lab, biomimetic approach, cancerous, cold war, curium, dahlia an, decontamination, dirty bomb, dtpa, eleanor blakely, event, fukushima daiichi, glenn seaborg, health threats, hopo, hydroxypyridonate ligands, iron, japanese official, kathleen bjornstad, ken raymond, lawrencium, mass contamination, models, multidentate hydroxypyridonate ligands, natural chelators, new york times, nobel laureate, nuclear power plant, nuclear reactor accident, patricia durbin, periodic table, plutonium, radiation exposure, radioactive chemical elements, radioactivity, rebecca abergel, terrorist attack, tokyo metropolitan area, triple meltdown, university of california, uranium

*Berkeley Lab Researchers Developing Promising Treatment for Safely Decontaminating Humans Exposed to Radioactive Actinides*

The New York Times recently reported that in the darkest moments of the triple meltdown last year of the Fukushima Daiichi nuclear power plant, Japanese officials considered the evacuation of the nearly 36 million residents of the Tokyo metropolitan area. The consideration of so drastic an action reflects the harsh fact that in the aftermath of a major radiation exposure event, such as a nuclear reactor accident or a “dirty bomb” terrorist attack, treatments for mass contamination are antiquated and very limited. The only chemical agent now available for decontamination – a compound known as DTPA – is a Cold War relic that must be administered intravenously and only partially removes some of the deadly actinides – the radioactive chemical elements spanning from actinium to lawrencium on the periodic table – that pose the greatest health threats. (more…)