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Gleiche Hypothese, gleiche Daten – variable Ergebnisse?

By Guest PostSeptember 8, 2020Scienceannabel loosecat vermeer, behavioral finance expert, claus lamm, corona krise, gehirnaktivitaet, lei zhang, neuroimaging daten

Metastudie zeigt, wie Wissenschaft sich selbst kritisch hinterfragen und kontrollieren kann

Kritische Selbstreflexion im Wissenschaftsbetrieb ist unabdingbar – die derzeitige Corona-Krise bestätigt dies eindrücklich. In einem Experiment haben rund 200 internationale Forscher*innen unabhängig voneinander denselben Datensatz über Gehirnaktivität während einer Magnetresonanztomographie analysiert. Ziel war es abzuschätzen, wie variabel die Ergebnisse der bildgebenden Hirnforschung sein können. Zudem sollte überprüft werden, inwiefern sowohl die beteiligten als auch an den Auswertungen unbeteiligte Wissenschafter*innen die Ergebnisse vorhersagen konnten. (more…)

‘The blob’ of abnormal conditions boosted Western U.S. ozone levels

By Guest PostMay 21, 2017Environmentdan jaffe, lei zhang, measurement of ozone, mount bachelor, the blob, us ozone levels

An unusually warm patch of seawater off the West Coast in late 2014 and 2015, nicknamed “the blob,” was part of an offshore pattern that had cascading effects up and down the coast. Its sphere of influence was centered on the marine environment but extended to weather on land. (more…)

China’s chance to reinvent itself environmentally

By Guest PostJuly 22, 2013Environmentair pollution, cancer, China, chinese cities, environmental problem, environmental protection law, environmental well being, epl, gross domestic product, guizhen he, heart disease, jianguo jack liu, lei zhang, life expectancy, michigan state university, natural system, Netherlands, population, problem, rates of stroke, renmin university, wageningen university, yonglong lu

China’s 34-year-old Environmental Protection Law was created when it made sense for legislators in a developing country to trade environmental well-being for a boost to the gross domestic product.

Today, China wrestles with pollution that is leaving its citizens gasping for clean air, worried about water quality and concerned for the safety of the food grown there. In the current issue of Science, a team of researchers, including a Michigan State University sustainability expert, offers guidelines for revising the EPL to protect both humans and nature. (more…)

Under the Electron Microscope – A 3-D Image of an Individual Protein

By Guest PostJanuary 25, 2012Science3d image, apoa 1, apolipoprotein a 1, atomic scale resolution, bad cholesterol, berkeley lab, cryo electron microscope, cryoem, electron microscopic image, energy filter, fuzzy, gang ren, german manufacturers, good cholesterol, grapheme, hdl, heart disease, human metabolism, igg antibody, individual particle electron tomography, ipet, kilodaltons, lattice of carbon, lei zhang, libra 120, lilliputian scale, liquid nitrogen, measure of atoms, model, molecular foundry, molecule, nanometer, Nanotechnology, nuclear magnetic resonance, one atom, particle, protein, protein model, pulses of energy, racing bicycle, risk factor, single protein, xray diffraction, zeiss libra 120 cryo tem microscope

*The high resolution of Lawrence Berkeley National Laboratory’s Gang Ren*

When Gang Ren whirls the controls of his cryo-electron microscope, he compares it to fine-tuning the gearshift and brakes of a racing bicycle. But this machine at the U.S. Department of Energy (DOE)’s Lawrence Berkeley National Laboratory (Berkeley Lab) is a bit more complex. It costs nearly $1.5 million, operates at the frigid temperature of liquid nitrogen, and it is allowing scientists to see what no one has seen before.

At the Molecular Foundry, Berkeley Lab’s acclaimed nanotechnology research center, Ren has pushed his Zeiss Libra 120 Cryo-Tem microscope to resolutions never envisioned by its German manufacturers, producing detailed snapshots of individual molecules. Today, he and his colleague Lei Zhang are reporting the first 3-D images of an individual protein ever obtained with enough clarity to determine its structure. (more…)

Tag Archives: lei zhang

Gleiche Hypothese, gleiche Daten – variable Ergebnisse?

‘The blob’ of abnormal conditions boosted Western U.S. ozone levels

China’s chance to reinvent itself environmentally

Under the Electron Microscope – A 3-D Image of an Individual Protein