Tag: "timing" at biology news
Changes in chromosomal constitution of preimplantation embryos suggest caution in genetic screening
...s they occurred during preimplantation period. The timing
is significant because embryos used in IVF are normally transferred at between 3 and 5 days old, says Ms Frumkin. We found that embryos which were abnormal on day 3 demonstrated a high rate of mosaicism However, on day 5 some of them had undergone ...
Research finds that circadian rhythms dominate all life functions
...pression is affected by circadian rhythms, and the timing
of the rhythms from each group of genes that are s...cycle over a period of about 24 hours and regulate timing
for most physiological functions and behaviors such as sleeping, eating and activity.As a checks-and...
Genomatix expands operations in North America
...n understanding eukaryote gene regulation. And the timing
is perfect for capitalizing on the explosion of genomic data becoming available for analysis. We expect to grow our business here dramatically over the next 3 years and look forward to working closely with the Munich parent company to achieve our goa...
Call of the child
...the current study, Liu and Schreiner show that the timing
and strength of the auditory cortical responses to these communicative sounds differ between these two groups of female mice: neurons in mother mice respond more quickly and robustly. The authors further establish that this difference in neural re...
Caribbean frogs started with a single, ancient voyage on a raft from South America
...lding trees of relationships among the species and timing
the divergences of the species with molecular-clock methods. "Molecular clocks work by counting the number of DNA-sequence mutations separating two species and then dividing that number by the rate of change, which is established with the help of fo...
Research team identifies new Alzheimer's gene
...d decision regarding the most appropriate type and timing
of treatment, said Dr. Chris Heward, President of Kronos Science Laboratory. Until recently, researchers lacked the technology to examine the genetic components of a disease at such a high-level of detail. By utilizing the Affymetrix 500K Arrays, t...
News tips from the Journal of Neuroscience
...culus (IC) and primary auditory cortex (AI) encode timing
and location features of auditory stimuli. The lat...in anesthetized animals in which the precise spike timing
is preserved or even improved between the IC and AI. But Ter-Mikaelian et al. report rather differen...
Duetting birds with rhythm present a greater threat
...s, or irregular tempos. Yet the influence of those timing
differences on the level of threat perceived by members of the birds listening audiences remained uncertain. Hall and study collaborator Robert Magrath of Australian National University, Canberra, tested the function of duet precision by broadcasti...
Jet lag: It's all about chemical reactions in cells
Circadian clocks regulate the timing
of biological functions in almost all higher organ... zones knows the jet lag that can result when this timing
is disrupted. Now, new research by Cornell and Dartmouth researchers explains the biological mechani...
U of MN will lead national research study on causes of bone cancer in children
...een bone growth genes and osteosarcoma because the timing
and extent of adolescent bone growth are mostly genetic. "We also will study how well the cells repair DNA damage naturally, and if the genes are impacted by diet, physical activity, family health history, and other lifestyle-related habits." A DNA s...
2007 Joint Assembly in Acapulco -- press conference schedule
...ver the Laurentide Ice Sheet 12,900 years ago. The timing
coincides with a great die-off of mammoths and other North American megafauna and the onset of a period of cooling in Northern Europe and elswhere known as the Younger Dryas Event. Speakers will discuss numerous lines of evidence contributing to the ...
Iowa State scientists demonstrate first use of nanotechnology to enter plant cells
...ls. This unique feature provides total control for timing
the delivery The teams first attempt to use the porous silica nanoparticle to deliver DNA through the rigid wall of the plant cell was unsuccessful. The technology had worked more readily in animals cells because they dont have walls. The nanopart...
Soy estrogens and breast cancer: Researcher offers overview
...) "The resolution of this paradox may lie in the timing
of estrogen administration," Helferich said. Exposure to genistein, an estrogen, before puberty causes mammary gland differentiation. "A differentiated cell undergoes less proliferation and therefore is less likely to progress through the cancer proc...
Urbanization favors sedentary males
...igratory disposition had an impact on the seasonal timing
of reproduction. Partecke and Gwinner found that the birds exhibited migratory traits - fat buildup and more nocturnal activity, during periods in the spring and fall. While they found little difference between forest and urban females, urban males...
New understanding of schizophrenia could lead to new treatment approaches
...rom white-matter defects may also help explain the timing
of its emergence, Corfas notes. Recent evidence suggests that myelination of the prefrontal cortex (a brain area that has been implicated in schizophrenia) occurs not only during infancy and toddlerhood, but also during late adolescence or early adul...
'Junk' DNA now looks like powerful regulator, Stanford researcher finds
...roposed in 1956 that they could help determine the timing
for when nearby genes turn on and off....
Biologists prove critical step in membrane fusion
... fully fuse there is the potential to control the timing
of drug delivery....
AGU Journal Highlights -- April 16, 2007
...ntury. Further, the authors noted that the bloom's timing
and magnitude, as well as species shifts associate...but propagate equatorward below this boundary. The timing
between shifting from the meridional propagation of the pair of warm-stratospheric/cold-tropospheric...
New study sheds light on long-term effects of logging after wildfire
...e likelihood of a severe reburn is affected by the timing
not just the amount of fuel accumulation after fire. The study examines fuel accumulation with and without logging after a large wildfire in the Blue Mountains of northeast Oregon. Three treatments were examined: commercial logging that removed ...
Mouse model advances understanding of synovial sarcoma
... by Cell Press, provides new information about the timing
and environment required for initiation and progre...c technique allowed the researchers to control the timing
of fusion protein expression so as to examine what happens when the protein is expressed at differen...
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