Tag Archives: Europe

A Bug’s (Sex) Life: Diving Beetles Offer Clues About Sexual Selection

By Guest PostFebruary 6, 2012Nature, Sciencearizona desert, co evolution, dawn higginson, diving beetles, dytiscidae, epifluorescence image, Europe, evolution, evolutionary relationship, female, fertilization, great diving beetle, hygrotus sayi, invertebrate, kari segraves, kelly miller, larva, male, mammal, mollusk, reproductive organ, scott pitnick, sexual evolution, sexual selection, sexual trait, speciation, sperm evolution, sperm storage, spermatheca, syracuse university, thermonectus marmoratus, university of arizona

*Studies of diving beetles suggest sperm evolution may be driven by changes in female reproductive organs, challenging the paradigm of post-mating sexual selection being driven mostly by competition among sperm.*

Studying female reproductive tracts and sperm in diving beetles (Dytiscidae), researchers from the University of Arizona and Syracuse University have obtained a glimpse into a bizarre and amazing world of sperm that can take on a variety of forms – including joining together into conglomerates that navigate the twisted mazes of the female reproductive tract.

Analyses of the evolutionary relationships among diving beetles reveal that sperm form appears to follow function dictated by female reproductive organs. (more…)

Vision Improves Modestly in Patients after Human Embryonic Stem Cells Transplants

By Guest PostJanuary 24, 2012Health, Scienceblind patients, central visual rescue, clinical trials, Europe, eye diseases, eyes, human embryonic stem cells, immunosuppression therapy, lancet, macular degeneration, photoreceptor, retinal cells, retinal pigment epithelial, rpe, stargardts macular dystrophy, stem cells, steven schwartz, therapeutic use, transplantation, united states, vision

Researchers at UCLA’s Jules Stein Eye Institute and colleagues who successfully transplanted specialized retinal cells derived from human embryonic stem cells into the eyes of two legally blind patients report that the transplants appear safe and that both patients have experienced modest improvement in their vision.

The preliminary findings, published online Jan. 23 in the journal The Lancet, represent a milestone in the therapeutic use of stem cells and may pave the way for a new therapy to treat eye diseases, the researchers said. Because this is the first time physicians have applied the power of regenerative medicine to eye disease, the clinical trials are being watched closely by scientists, stem-cell therapy advocates and the public. (more…)

Nearly 50 Percent of Internet Users in Europe Visit Newspaper Sites

By Guest PostJanuary 19, 2012Technologybild, Comscore, daily mail, Europe, european markets, europeans, Facebook, german newspaper, Google, groupon, guardian, hürriyet, internet usage, kingfisher, linkedIn, milliyet, network, newspaper sites, russian internet audience, turkish newspaper, vkontakte

*comScore Releases Overview of European Internet Usage for November 2011*

LONDON, UK, 19 January 2012 – comScore, Inc., a leader in measuring the digital world, today released an overview of Internet usage in Europe, showing that 379.4 million Europeans went online in November 2011 for an average of 27.8 hours per person. This release highlights Internet usage in 49 European markets aggregated into the European region and provides individual reporting on 18 markets. Amongst its findings, the study also showed that 47.8 percent of Europeans visit Newspaper sites, with a notable percentage of visits to the top 5 Newspaper sites preceded by a visit to Facebook.

Nearly 1 in 2 Europeans Visit Newspaper Sites
In November 2011, 181.5 million unique people in Europe visited Newspaper sites, an increase of 9 percent from the previous year. The Daily Mail continued to attract the largest audience at 20.1 million unique visitors, followed by the Guardian at 15.7 million unique visitors. Turkish newspapers Hürriyet and Milliyet and German newspaper Bild rounded out the top five Newspaper properties, with each attracting approximately 10 million unique visitors. (more…)

Upper Atmosphere Facilitates Changes That Let Mercury Enter Food Chain

By Guest PostJanuary 5, 2012Environmentaquatic ecosystems, atmosphere, bacteria, bangor, broomfield, chemical reactor, climate conditions, coal burning in asia, daniel jaffe, ecosystem impacts, Europe, food chain, humans, lower stratosphere, maine, mercury, mercury contaminated fish, mercury emissions, metallic element, methyl mercury, North America, oxidation, oxidized mercury, research aircraft, seth lyman, southwest united states, university of washington bothell, upper atmosphere, upper troposphere, vapor

Humans pump thousands of tons of vapor from the metallic element mercury into the atmosphere each year, and it can remain suspended for long periods before being changed into a form that is easily removed from the atmosphere.

New research shows that the upper troposphere and lower stratosphere work to transform elemental mercury into oxidized mercury, which can easily be deposited into aquatic ecosystems and ultimately enter the food chain. (more…)

Andrew Artenstein: Essential Enzymes Key to Disease, Maybe Treatments

By Guest PostJanuary 2, 2012Healthalzheimer, andrew artenstein, anthrax, athlerosclerosis, bacteria and viruses, biodefense, body, cancer, chemical reactions, david orenstein, disease, ebola, enzymes, essential proteins, Europe, flu, iaips, infectious diseases, inter alpha inhibitor proteins, measles, microscopic level, molecules, natural human proteins, outbreak of h1n1, pathways, pcs, proprotein convertases, proteins, sars, steven opal, therapies, viruses

*Proprotein convertases are enzymes that activate many essential proteins, but they are also implicated in many processes that cause disease. In a research review in the New England Journal of Medicine, Andrew Artenstein and Steven Opal argue that proprotein convertases are potentially rich targets for developing therapies.*

Most people have never heard of proprotein convertases, but the enzymes activate many proteins that are essential for life. Unfortunately, their fundamental role puts them in the middle of many processes that cause disease – not just cancer or athlerosclerosis, but both of those and Alzheimer’s and anthrax and the flu and an amazing variety of other maladies.

In a research review article appearing Dec. 29 in the New England Journal of Medicine, Andrew Artenstein, physician-in-chief in the Department of Medicine at Memorial Hospital, and Steven Opal, chief of infectious diseases at Memorial Hospital, argue that proprotein convertases (PCs) are potentially rich targets for developing therapies. Artenstein, who with Opal is on the faculty of the Warren Alpert School of Medicine, explained PCs to David Orenstein. (more…)

Abandoned Mines Hold Potential to Capture Wind Energy

By Guest PostDecember 19, 2011Environmentabandoned open pit mines, al rudeck, don fosnacht, electricity demand, energy providers, Europe, great river energy, iron range, minnesota, minnesota power, power supply, pump water, pumped hydro storage, pumped hydro storage process, renewable energy sources, renewable energy technology, reservoirs, rick lancaster, university of minnesota, wind, wind energy

MINNEAPOLIS / ST. PAUL — Minnesota’s Iron Range is pocked with ponds – abandoned open pit mines – that could help energy providers more efficiently use intermittent renewable energy sources, such as wind, to meet state renewable energy mandates. A study released Friday by the University of Minnesota Duluth’s Natural Resources Research Institute shows that the water-laden pits have the potential to store wind energy using a process developed in Europe in the late 1800s.

The pumped-hydro storage process would use excess late-night wind energy to pump water uphill from the pits to a higher-elevation holding pond. Then, when electricity demand goes up during the day, the process reverses the flow and captures the energy in hydro turbines. For every 100 megawatts used to pump the water upward, the plant generates nearly 80 megawatts through the turbines. (more…)

UK Mums Are Keen Online Shoppers

By Guest PostDecember 9, 2011TechnologyComscore, demographic analysis, ea online, Europe, european markets, females, flowers, france, Germany, gifts, Google, household, internet usage in europe, italy, online, top online destination, turkey, uk mothers, united kingdom, vimeo

*comScore Releases Overview of European Internet Usage for October 2011*

LONDON, UK, 9 December 2011 – comScore, Inc., a leader in measuring the digital world, today released an overview of internet usage in Europe, showing 376.6 million unique visitors went online in October 2011 for an average of 27.8 hours per person. This study highlights internet usage in 49 European markets aggregated into the European region and provides individual reporting on 18 markets. The study also analysed the online behaviour of mothers, defined as females age 25 and older with children in the household, showing their heavy propensity to visit retail sites. (more…)

Fast Times in Physics

By Guest PostNovember 29, 2011Scienceatomic clocks, beams of neutrinos, c, Chicago, einstein, equation, Europe, faster than light, fermilab, Japan, marvin marshak, minos, neutrinos, northern minnesota, opera, physicists, scientific world, soudan underground laboratory, speed of light, subatomic particles, time, university of minnesota, vacuum, vibrations of cesium atoms

A U physicist will help determine if neutrinos can outrace light

Back in 2007, a physics experiment clocked elusive subatomic particles called neutrinos going faster than light.

That wasn’t supposed to happen. If the speed of light in a vacuum—denoted “c” by physicists—isn’t the universal speed limit, it would mean that Einstein put the wrong number in his famous E=mc² equation.

University of Minnesota physicist Marvin Marshak was part of the experiment, called MINOS. It clocked beams of neutrinos shot from Fermilab, a national physics lab near Chicago, to a detector 457 miles away in the Soudan Underground Laboratory in northern Minnesota. (more…)