Tag: "microscope" at biology news

Newly created cancer stem cells could aid breast cancer research

... models that look like real human tumors under the microscope and behave like those seen in many patients. In more than 90 percent of human breast tumors, cancer cells resemble those lining our bodys cavities. A trained pathologist can spot the similarities under a microscope. But the cancer cells previously...

New, more direct pathways from outside the cell-to-cell nuclei discovered

...phagosome behavior he sought by using the confocal microscope to repeatedly obtain views that sliced clear through the cell. Specifically, the team tracked phagosomes carry extracellular material into the cell nuceli by introducing fluorescent latex beads into the area outside of the cell. They then observed ...

A unique arrangement for egg cell division

... spindle assembly over time with a high resolution microscope in live mouse oocytes, Ellenberg and his PhD student Melina Schuh found that the missing centrosomes are replaced by a flexible system of many small microtubule organising centres (MTOCs) in oocytes. Like centrosomes, these MTOCs serve as platforms f...

In limiting life span, study finds booming bacteria innocent

...llion or more per fly. Using a scanning electron microscope to examine the insects outer surfaces, the researchers showed that some of the bacteria were even banding together, forming continuous biofilms. Yet treatments that reduced the number of bacteria had no effect on life span, they found. That discovery...

Where broken DNA is repaired

...ding on the cell type. "What we see through the microscope is not the broken DNA itself but a collection of p...on data from gel electrophoresis "into artificial microscope images of a nucleus damaged by radiation." To do this, says Costes, "I simulated the optical tran...

Synchrotron could help save the Tassie devil

...he synchrotrons infra-red beamline combined with a microscope and spectrometer which detects how different materials absorb and reflect the radiation can be used to determine if the composition of hair differs between diseased animals and healthy ones. The infra-red spectrum tells us about protein and fat s...

Zebrafish: It's not your parents' lab rat

... mothers' bodies -- and can thus been seen under a microscope at every step of their development. "It's a beautiful organism for experiment," Lane said. "It develops in a very regular way, so any abnormality is easy to spot, even for undergraduates with only a few days training."...

American Chemical Society's Weekly PressPac -- July 18, 2007

...g how an abrasive will perform, while the electron microscope has been used to optimize the structure of the tiniest abrasives. With the development of stronger materials, scientists have correspondingly developed stronger abrasives and improved bonding agents to allow for more aggressive sanding. From simple w...

Protein pulling -- Learning how proteins fold by pulling them apart

...f the sample dish. The needle from an atomic force microscope (AFM) was repeatedly dipped into the solution. The tip of the AFM operates much like a phonograph needle. The AFM needle is on the end of a cantilever arm that bobs up and down over the sample. The tip of the AFM needle is just a few atoms wide. Bobb...

Unraveling the physics of DNA's double helix

... the new study, the Duke team used an atomic force microscope (AFM) to capture the "mechanical fingerprint" of the attraction between bases within DNA strands. The bonds within the molecules' sugar and phosphate backbones remained intact and therefore had only a minor influence on the force measurements, Marsza...

New imaging method clarifies nutrient cycle

...f chemical composition, and doubles as an electron microscope to allow researchers to overlay chemical and physical images. It opens up a whole world of studies, Nealson said. You can use this technology to look at things going on inside the cell. This is going to change the way that we do a lot of microbiolo...

CU researchers solve mystery of how DNA strands separate

... the strands in a double helix to the surface of a microscope cover slip. The end of the other strand was attached to a micron-sized plastic bead. They then focused a laser beam on the tiny bead and trapped the bead in place within the beam of light. This setup allowed the researchers to measure the position an...

New method for reading DNA sheds light on basis of cell identity

...lls or blood cells. Looking at a cell through a microscope often cannot tell you what kind of cell it is, or more importantly, what it has the potential to become, said first author Tarjei Mikkelsen, a Broad Institute researcher and a Harvard-MIT Health Sciences and Technology graduate student. But by decodi...

New genetic test developed at Emory advances detection and diagnosis of muscular dystrophy

...gest known gene in humans, on a chip the size of a microscope slide. The test initially detects deletions and duplications, then microarray-based resequencing is used to rapidly identify subtle genetic variations that may cause muscular dystrophy. The EmArray Dystrophin test confirms clinical diagnosis of Duc...

Scientists discover role of enzyme in DNA repair

... They then used a particular laser attached to the microscope to introduce DNA breaks at sites where the polymerase was active. This microscopy approach was developed by NCIs Michael Kruhlak, Ph.D., first author in the report. Using the ProcessDB software developed by Integrative Bioinformatics Inc, Robert Phai...

New tumor markers -- 'Spot the differences'

...he proteins coded by some of the messages. Using a microscope and colour-labelled antibodies, we managed to dye PC cells and to distinguish them from cells of a healthy pancreas or a pancreas with chronic pancreatitis (Fig. B). These results indicate the usefulness of this marker and establish the basis for the...

NIH awards nearly $21 million to fund cutting-edge research equipment

...rmance, intermediate voltage transmission electron microscope to enable 3-D imaging of sections of cells and bio...rmance, intermediate voltage transmission electron microscope will replace an outdated instrument at the NCRR-funded National Microscopy and Imaging Research Reso...

Now playing -- Cell migration LIVE!

...to watch this process inside the ovarian tissue no microscope can do that and worse, the cells stop moving if theyre outside the ovaries. In a years-long effort, Montell and her team figured out just what to feed these cells to keep them alive and doing their thing without their ovarian homes. We were stuck ...

New screening method to help find better biofuel crops

...material. A fiber optic bundle placed between the microscope and the spectrometer allows a direct measure of the chemical makeup at any location on the sample being viewed on the microscope. This method has several advantages over other analytical techniques, Smith explained. First, analysis requires very li...

Crammed with charged DNA, pressure rises inside virus

...ather decadent meal. But it is a 3-D cryoelectron microscope reconstruction of the cross-section of a virus, before and after cramming itself full of its own DNA. The virus, phi29, has a tiny motor that pumps its DNA into the capsidouter shellduring the assembly process. The potential energy of the tightly ...

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(Date:4/22/2014)... to Asia to coordinate with allies and reconfirm ... the Office of Naval Research (ONR) emphasized today ... an example of strong and growing ties between ... region. , The APTEP program, centered in Hawaii ... development of alternative energy technologies. It takes a ...
(Date:4/22/2014)... French . ... the complete genome and subsequent phylogenetic analysis show that ... that is distinct from strains previously identified in the ... also linked the laboratory confirmed cases with the initial ... virus is a lethal, highly contagious virus for which ...
(Date:4/22/2014)... that exposure to environmental enrichment can induce ... learning and memory. Previous studies have demonstrated ... the superficial layer of the cerebral cortex ... and these neurons exhibit very weak properties ... Whether environmental enrichment has an impact on ...
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