Proceedings available for conference on sex and gene expression
...pics, including: Sex differences that shape the earliest events in mammalian embryologic development. The impact of gonadal hormones, both during fetal development and later in life, on cognitive functions. Maternally inherited mitochondrial DNA and paternally inherited Y chromosome DNA as tools for stu...Roll call: Study shows how bacteria signal a quorum
...ia evade detection by the immune system during the earliest stages of infection, he said. Although they knew the bacterial genes and proteins responsible for making and receiving the signal, Bassler and others could not identify the AI2 molecule itself. "They tried every trick in the book, basically everythin...Stem cell study provides new clues to origin of Down syndrome
MADISON - Using stem cells as a window to the earliest developmental processes in the human brain, scient...mbridge, and others has begun to shed light on the earliest genetic events in humans that give rise to a serious cognitive disability. It has long been known th...Stool test for colon cancer reported by Kimmel Cancer Center at Johns Hopkins
...rkers, it is exquisitely specific and found in the earliest and curable stages of tumor formation. If this test identifies mutations of the APC gene, it means there is extremely likely to be a cancer or premalignant growth," he says. In addition, this test is painless and risk-free. Vogelstein and Kinzler ar......erstanding of the biochemistry and genetics of the earliest stages of embryonic development, the UCSD team's discovery is likely to spur scientists to search for other proteins in the cell with dual roles. "The idea that the general cellular machinery can play a direct role in specialized processes in develo...Scientists prove mature adult cells can be cloned
...ient. This makes sense because ES cells are at the earliest developmental stage and have the potential to become all the cells that make up an organism. But researchers didnt know if cloning could set the clock back for mature adult cells, such as skin or mammary cells, which are committed to a specific funct...Origins of 'modern' behavior might be linked to population pressures
...h modern humans--including a shift in diet and the earliest evidence of personal ornaments like beads--may be linked to an increase in human population density between 40 and 50 thousand years ago, Mary C. Stiner and Steven L. Kuhn reported today at the American Association for the Advancement of Science (AAA...Is the evidence for human 'replacement' really clear?
...ymbolism is an emergent property found in even the earliest hominids, and that it is uncorrelated with a particular human species or subspecies. Clark notes that many archaeologists and paleoanthropologists dont seem to recognize that the lack of a strong record of a behavior does not mean that it was abse...UCLA scientists, colleagues substantiate biological origin of earliest fossils
...es have substantiated the biological origin of the earliest known cellular fossils, which are 3.5 billion years old. The research is published in the March 7 issue of the journal Nature. Schopf and a team of scientists at the University of Alabama, Birmingham have devised a new technique using a unique laser-...New dinosaur related to Triceratops
...blishes that this split occurred no later than the earliest part of the Cretaceous Period about 130 million years ago," Dr. Makovicky says. "Also, it indicates that ceratopsians acquired some of their distinctive features earlier and more rapidly than was previously recognized. "In addition, Liaoceratops dem...UCLA to host free symposium April 5 on extinctions in Earths history
...Schopf is one of the worlds leading experts on the earliest life on Earth. He has edited eight volumes including two prize-winning monographs on early evolution, and is the author of "Cradle of Life." Scott Wing, research curator, National Museum of Natural History, Washington, D.C. A biologist, Wing is prim...Scientists trace recently found genes to the evolution of big brains
...erosis to mental retardation to brain tumors. The earliest fruits of the work may include more accurate diagnosis of certain brain tumors, say the researchers. We reason that some of the genes required to develop a normal, functioning brain may contribute to cancer of the brain if their expression is perturb...Orgin of mysterious subterranean gases identified, says University of Toronto researcher
...hat may have played a part in the formation of the earliest life on the planet has been found by a University of Toronto geochemist. Until now, it has been assumed that any evidence of the abiogenic, or non-life-based, reactions that created the first simple hydrocarbons on the early Earth had been erased by ...Argonne chemist wins national award for studies of plant energy
...al Laboratory in Illinois. Her work focuses on the earliest steps of photosynthesis, the process that converts light into chemical energy to drive the growth, repair and reproduction of plants. The first reaction to take place is a separation of electrical charge, she said. Light is absorbed, the energy exci...April GEOLOGY and GSA TODAY media highlights
...Wisconsin 53706, USA. Pages 351-354. The time of earliest Earth was a period of mystery. There are no rocks known to have formed during the first 500 m.y. after the formation of the solar system and Earth. Only a few tiny isolated crystals of the mineral zircon have been dated to come from this period. It h...Scientists push back primate origins from 65 million to 85 million years ago
...w statistical approach fills in fossil record The earliest unequivocal primate fossils date from 55 Mya. Most...th of time between the oldest known fossil and the earliest common ancestor of a given group. It also estimates the likely number of extinct fossil species in t...Findings give insight into how colon cells transform into precancerous polyps
...ey signaling pathway appears to be critical to the earliest transformation of normal colon cells into growths called polyps that may advance to colon tumors, Vanderbilt-Ingram Cancer Center scientists have reported. The findings suggest that, someday, doctors might use drugs that interrupt this...Obesity may exacerbate a heart disorder in African American females
...umference (cm). QT interval was measured from the earliest onset of the QRS complex to the end of the T wave in lead II. Measurements from five consecutive beats were averaged. Blood pressure was measured twice; blood was drawn (10 ml) and sent to a local laboratory for analyses. An interviewer administ...UT Southwestern, M.D. Anderson researchers identify lung-cancer tumor suppressor genes
...the discovery of this chromosomal 3p region is the earliest genetic change detected in the process of lung can... development is novel, said Dr. Roth. This is the earliest genetic change yet identified in lung cancer, a change that can take place in normal-looking lung ti...Origin of bipedalism seems most closely tied to environmental changes
... the wrist joint, in particular, suggests that the earliest humans evolved bipedalism from an ancestor adapted...f the available evidence for the argument that the earliest human biped evolved from ancestors that both knuckle-walked and climbed trees, rather than from ance...