http://www.physorg.com/ en-us Physorg.com internet news portal provides the latest news on science including: Physics, Nanotechnology, Life Sciences, Space Science, Earth Science, Environment, Health and Medicine. (PhysOrg.com) -- A research team led by Nancy Speck, PhD, Professor of Cell and Developmental Biology at the University of Pennsylvania School of Medicine, has identified the location and developmental timeline in which a majority of bone marrow stem cells form in the mouse embryo. The findings, appearing online this week in the journal Nature, highlight critical steps in the origin of hematopoietic (or blood) stem cells (HSCs), says senior author Speck, who is also an Investigator with the Abramson Family Cancer Research Institute at Penn. http://www.physorg.com/news150731605.html Biology Fri, 09 Jan 2009 13:53:25 EST news150731605 Adolescents who misbehave at school are more likely to have difficulties throughout their adult lives, finds a 40-year study of British citizens published on bmj.com today. These difficulties cover all areas of life, from mental health to domestic and personal relationships to economic deprivation. http://www.physorg.com/news150695355.html Medicine & Health Fri, 09 Jan 2009 03:49:15 EST news150695355 Researchers at Oregon Health & Science University's School of Dentistry have discovered a novel function of the peptide known as Nerve Growth Factor (NGF) in the development of the trigeminal nerve. The trigeminal nerve provides the signaling pathway for periodontal pain, dental surgical pain, and pain associated with temporomandibular disorder, trigeminal neuralgia, migraine, and other neuropathic and inflammatory conditions. http://www.physorg.com/news150644959.html Medicine & Health Thu, 08 Jan 2009 13:49:19 EST news150644959 Scientists at the Stanford University School of Medicine and at UC-San Francisco have succeeded in isolating stem cells from human testes. The cells bear a striking resemblance to embryonic stem cells - they can differentiate into each of the three main types of tissues of the body - but the researchers caution against viewing them as one and the same. http://www.physorg.com/news150397024.html Biology Mon, 05 Jan 2009 16:57:04 EST news150397024 Digitalis-based drugs like digoxin have been used for centuries to treat patients with irregular heart rhythms and heart failure and are still in use today. In the Dec. 16 issue of the Proceedings of the National Academy of Sciences, researchers at the Johns Hopkins University School of Medicine now report that this same class of drugs may hold new promise as a treatment for cancer. This finding emerged through a search for existing drugs that might slow or stop cancer progression. http://www.physorg.com/news150389159.html Medicine & Health Mon, 05 Jan 2009 14:45:59 EST news150389159 Teach students some facts, and they learn for one exam at a time. Teach students to think and they learn how to learn for the rest of their lives. Ambitious work from European and Israeli researchers is making it easier to help students learn to think for themselves. This is exciting stuff for teachers. http://www.physorg.com/news150388262.html Technology Mon, 05 Jan 2009 14:31:02 EST news150388262 Few things are as tiresome as house hunting and moving. Unfortunately, metastatic cancer cells have the relocation process down pat. Tripping nimbly from one abode to another, these migrating cancer cells often prove far more deadly than the original tumor. Although little has been known about how these rogue cells choose where to put down roots, researchers at the Stanford University School of Medicine have now learned just how nefarious they are. http://www.physorg.com/news150383375.html Medicine & Health Mon, 05 Jan 2009 13:09:35 EST news150383375 Neurologists have observed for decades that Lewy bodies, clumps of aggregated proteins inside cells, appear in the brains of patients with Parkinson's disease and other neurodegenerative diseases. http://www.physorg.com/news150091261.html Medicine & Health Fri, 02 Jan 2009 04:01:01 EST news150091261 Despite recent widespread media attention given to studies that have indicated one-third of American children have a weight problem, a new study shows just one-third of children who are overweight or obese actually receive that diagnosis by a pediatrician. The study, led by researchers at The MetroHealth System and Case Western Reserve University School of Medicine in Cleveland, also stresses that this failure to diagnose appears to mostly impact children who may most greatly benefit from early intervention. The study is published in the January issue of the journal Pediatrics. http://www.physorg.com/news149774891.html Medicine & Health Mon, 29 Dec 2008 12:08:11 EST news149774891 (PhysOrg.com) -- At the end of July 2008, major news agencies reported an outbreak of jalapeño-related salmonella that sickened more than 1,000 people in Mexico and the United States. It was the biggest outbreak of its kind in decades. http://www.physorg.com/news149346537.html Medicine & Health Wed, 24 Dec 2008 13:08:57 EST news149346537 Researchers at the University of Southern California (USC) have, for the first time in history, derived authentic embryonic stem (ES) cells from rats. This breakthrough finding will enable scientists to create far more effective animal models for the study of a range of human diseases. http://www.physorg.com/news149343895.html Biology Wed, 24 Dec 2008 12:24:55 EST news149343895 (PhysOrg.com) -- Increased government support for families has coincided with a rise in births among women who left school at 16 compared to those who stayed in education after the age of 18. http://www.physorg.com/news149182094.html Other Sciences Mon, 22 Dec 2008 15:28:14 EST news149182094 A study in the Dec. 15 issue of the Journal of Clinical Sleep Medicine shows that after a one-hour delay of school start times, teens increased their average nightly hours of sleep and decreased their "catch-up sleep" on the weekends, and they were involved in fewer auto accidents. http://www.physorg.com/news148543709.html Medicine & Health Mon, 15 Dec 2008 06:08:29 EST news148543709 Medical students frequently suffer from depression, especially during their internship years. New research published in the open access journal BMC Medical Education reveals the extent of the problem and features a detailed analysis of the symptoms and sufferers. http://www.physorg.com/news147698110.html Medicine & Health Fri, 05 Dec 2008 11:15:10 EST news147698110 A new study has found that a school-based asthma education program conducted in the Oakland, California school district was shown to reduce symptoms and increase the number of days that children who suffered from asthma were able to go to school. The study will be published this month in the Journal of School Health. http://www.physorg.com/news147532685.html Medicine & Health Wed, 03 Dec 2008 13:18:05 EST news147532685 Days when schoolchildren walked to neighbourhood schools are long gone. A new study by a team of researchers led by Paul Lewis, a professor of Urban Planning at the Université de Montréal, shows that only 30 percent of children attending elementary school reach school on foot or by bicycle. http://www.physorg.com/news147530900.html Medicine & Health Wed, 03 Dec 2008 12:48:20 EST news147530900 Attending a high quality pre-school followed by an academically effective primary school gives a significant boost to children's development. These are the findings of a new study which shows that a stimulating early years home-learning environment also provides a sound foundation on which these experiences build. http://www.physorg.com/news147359760.html Other Sciences Mon, 01 Dec 2008 13:16:00 EST news147359760 No less than one quarter of second-generation immigrants in the Netherlands drops out of school. This is the most alarming result of a recent survey conducted among the second generation of Turkish and Moroccan descent in the two largest Dutch cities - Amsterdam and Rotterdam. However, this is only one side to the story as the survey report also shows that other second generation immigrants are doing extremely well, with a third continuing to higher education. How can these immense discrepancies in educational performance among second generation immigrants be explained? http://www.physorg.com/news146320895.html Other Sciences Wed, 19 Nov 2008 12:41:35 EST news146320895 A new Web site designed to emphasize smoking prevention for young girls has been launched through Children's Hospital at Dartmouth (CHaD) and Dartmouth Medical School (DMS). The safe, online patient education site was created by Dartmouth pediatrician Henry Bernstein to help prevent smoking in young girls 8-11 years old). http://www.physorg.com/news145818109.html Medicine & Health Thu, 13 Nov 2008 17:01:49 EST news145818109 A study released by researchers at the Columbia Center for Children's Environmental Health (CCCEH) at Columbia University's Mailman School of Public Health shows that developing antibodies to cockroach and mouse proteins is associated with a greater risk for wheeze, hay fever, and eczema in preschool urban children as young as three years of age. The study, published in the November 2008 issue of the Journal of Allergy and Clinical Immunology, is the first to focus on the links between antibody responses to cockroach and mouse proteins and respiratory and allergic symptoms in such a young age group. http://www.physorg.com/news145814327.html Medicine & Health Thu, 13 Nov 2008 15:58:47 EST news145814327 Two clones of highly antibiotic-resistant organism strains, which previously had only been identified in the United States, are now causing serious sickness and death in several Colombian cities including the capital Bogotá, say researchers at The University of Texas Medical School at Houston. The study, done in collaboration with Universidad El Bosque in Bogotá, is presented in a research letter published in the Nov. 13 issue of the New England Journal of Medicine. http://www.physorg.com/news145729040.html Medicine & Health Wed, 12 Nov 2008 16:17:20 EST news145729040 Children of immigrants who enter school with low math and reading skills have a better chance of catching up with their peers if they attend a school with high-performing students, well-supported teachers and services to families of English as a second language (ESL) children, according to a new study. http://www.physorg.com/news145513981.html Medicine & Health Mon, 10 Nov 2008 04:33:01 EST news145513981 With childhood obesity increasing, school administrators and public health officials are reducing availability of sugar-sweetened beverages (SSB) in schools. In a study published in the November/December 2008 issue of the Journal of Nutrition Education and Behavior, researchers found that reduction or elimination of SSB from school menus has little effect on total consumption by adolescents. http://www.physorg.com/news145513814.html Medicine & Health Mon, 10 Nov 2008 04:30:14 EST news145513814 Elementary school students will eat more whole grains when healthier bread products are gradually introduced into their school lunches, a new University of Minnesota study shows. http://www.physorg.com/news145280372.html Medicine & Health Fri, 07 Nov 2008 11:39:32 EST news145280372 A study initiated by researchers at Columbia University Mailman School of Public Health and the Leiden University Medical Center in the Netherlands suggests that prenatal exposure to famine can lead to epigenetic changes that may affect a person's health into midlife. The findings show a trickle-down effect from pregnant women to the DNA of their unborn children and the timeframe over which such early damage can operate. While previous studies have suggested that adult disease risk may be associated with adverse environmental conditions early in development, these data are the first to show that early-life environmental conditions can cause epigenetic changes in humans that persist throughout life. The full study findings are published online in the Proceedings of the National Academy of Science. http://www.physorg.com/news144598464.html Medicine & Health Thu, 30 Oct 2008 15:14:24 EST news144598464 Researchers at The University of Texas Medical School at Houston say the use of aggressive phototherapy reduces the odds that tiny premature infants will develop neurodevelopmental impairment such as cerebral palsy, blindness, deafness or physical or mental challenges. The study, titled "Aggressive Versus Conservative Phototherapy for Infants with Extremely Low Birth Weight," is published in the Oct. 30, 2008 issue of the New England Journal of Medicine. http://www.physorg.com/news144518911.html Medicine & Health Wed, 29 Oct 2008 17:08:31 EST news144518911 Researchers have discovered a mechanism for the rapid growth seen in infantile hemangioma, the most common childhood tumor. http://www.physorg.com/news143643578.html Medicine & Health Sun, 19 Oct 2008 13:59:38 EST news143643578 In many countries, school vouchers have come to be a controversial policy which allows parents to pay for the education of their children at a school of their choice, rather than the public school to which they are assigned. A new study in the journal Governance shows how the success of governments in introducing vouchers is highly correlated with these countries' different political institutions and traditions. http://www.physorg.com/news143297674.html Other Sciences Wed, 15 Oct 2008 13:54:34 EST news143297674 Girls who don't share a common language may have more difficulty adjusting socially than boys, according to surprising new Michigan State University research looking at language acquisition among young children. http://www.physorg.com/news142517566.html Other Sciences Mon, 06 Oct 2008 13:12:46 EST news142517566 In most cities, the corner store, with its chips, soda and candy, is ubiquitous. Convenient for the neighborhood residents, but also researchers are discovering, a major snack source for school age children. http://www.physorg.com/news142340562.html Medicine & Health Sat, 04 Oct 2008 12:02:42 EST news142340562