Tag: "microscope" at biology news

ORNL Microscope "Sees" Bumps That Reveal Partial DNA Structure

...et on a computer screen when using an atomic force microscope (AFM) to image a serpentine strand of DNA. And wh...he Health Sciences Research Division. The AFM is a microscope capable of atomic resolution that produces athree-dimensional image by tracing the surface of a mate...

Moving DNA Molecules With Magnetic Tweezers

...s device to move molecules back and forth beneatha microscope in one dimension. He plans to add more magnets and ajoystick to recreate the three-dimensional movement. A DNA molecule, by itself, is not magnetic. Wirtz overcomes thishurdle with iron oxide beads, each no larger than one-hundredthof a micron in d...

The CIA Would Like To Know What Scientists Are Seeing Over The Rainbow

... identify and sort out human chromosomes under the microscope not only by their size but also by their characteristic staining patterns. As staining techniques evolved, scientists used them to link chromosome changes to disease: Missing bands indicated a deletion of genetic material, as in some inherited dis...

Laser Microscope At Cornell Images Serotonin In Live Cells

...a millionth of a second), which are focused by the microscope so that there is a high probability that three photons arrive at the same time (in about 10-16 seconds) at the same molecule near the focus. Molecules such as serotonin and tryptophan, which can normally be excited only with deep ultraviolet (~250nm...

Gene For Last Major Form Of Batten Disease Discovered

...hich appears greenish-yellow when viewed through a microscope inultraviolet light. Defects in lysosomal function have been linked to many other disorders,including Tay-Sachs disease. "The identification of this protein in humansprovides a new avenue for investigators to explore that may lead to a betterunderst...

Mystery Of Vital Cell Protein Solved After 30 Years

...n patterns and images weregenerated on an electron microscope equipped with a special "cold stage" thatreduced d...ise"than a conventional electron microscope. This microscope is also equipped toallow the tilting of samples at various angles so images can be obtained fromdiff...

Microsurgery Made More Accurate With Virtual Measuring Tool

...e scales typically encountered under the operating microscope during surgical procedures. I. Introduction Mini...rgical field is obtained by combining an operating microscope head (Zeiss Inc.) with an add- on stereo-video apparatus (Bristlecone Inc.), which consists of two s...

Jellyfish Help To Make Sugar Smarter

... on plant cells containing it and watch through a microscope equipped with a special filter to see if they glow. This takes about 10 seconds, compared with other methods that can take a couple of days and involve very expensive equipment. "The gfp gene is strictly a scientific tool. You wouldn't include ...

Study Of Sulfides In Bacteria Casts Doubts On Evidence Of Life In Martian Meteorite ALH84001

...mally foundwith them. Using transmission electron microscope observations, the team, which includes ASU Geology andChemistry/Biochemistry faculty members Mihaly Posfai and Peter R. Buseck, Iowa State Universitymicrobiologist Dennis A. Bazylinski, and California Polytechnic physicist Richard B. Frankel, found c...

The Shape Of Life: How Does The Computer "Know" When It Sees It?

...g. Examiningthese "small" samples of Mars rocks by microscope would be like scouringa desert on foot in search of an occasional dry bone. Making the task more challenging, many things that are not life forms appearlifelike, while many true life formsappear to be non-life. Buying or creating a single computer to...

Taking The "Ouch" Out Of Needles: Arrays Of "Microneedles" Offer New Technique For Drug Delivery

...pe image showing the microneedles, (3) an electron microscope image ofthe microneedles to which color has been added. WRITER: John Toon...

The Touch Of Phytophthora

...tive cell death. This can be observed under the microscope as a rapid and sudden collapse of the cell contents around the intracellular fungal structure. Furthermore, the plant cell releases toxic compounds that possibly kill both the plant cell and the fungus. However, in the parsley/P. infestan...

Jurassic Beetle: CSIRO Entomologist Discovers Living Fossil

...white spiny beetle glittering in the light of his microscope was a living fossil, whose ancestral roots go back almost 200 million years. "The peculiar look of the animal caught my eye straight away. The unique combination of spines, scales and lack of wings. At first I was puzzled, then I realised it w...

NIEHS And U.C. Davis Researchers Find Protein That May Be Key To Non-Hormonal Family Planning And Treatment Of Infertility

...Goulding sits in a darkened roombefore a binocular microscope and a television monitor showing the highlymagnified view through the microscope. She manipulates a blastula-stage mouseembryo, a hollow ball of about sixty four cells, with a needle a fraction of thewidth of a hair, and injects cells lacking a spec...

Montana State University Scientist Contributes To Latest Dinosaur Discovery

...womicroscopes. One is a powerful scanning electron microscope in the university'sImage and Chemical Analysis Laboratory, which funded her project. Jackson saw a bumpy surface, straight pores and distinctive shell "units" reaching from the inside to the outside of the shell. She could alsosee horizont...

LSU Ag Center Program Focuses On Helping Animals Reproduce; Graduates Assist Humans, As Well

... With this approach, a tiny pipetteis used under a microscope to inject a sperm into an egg, or oocyte. One of Godke's Ph.D. students, Richard Cochran, worked for two yearsperfecting a way to do ICSI in horses. He had his first success this past Julywith the birth of a foal. The birth was a milestone b...

Researchers Find Fas Ligand Is Important In Blinding Disease

...form of macular degeneration. Theylooked under the microscope at specimens taken from human subjects and foundthat the RPE cells were positive for FasL and that the cells on the surface ofthe growing blood vessels were positive for Fas. To learn more about the importance of Fas and FasL in the retina,F...

Artificial Gels Could Speed DNA Sequencing

...n be identified. They mount the chips between two microscope slides, glue small reservoirs to each end to hold ...rops of a water-DNA mixture, place the slides on a microscope stage and apply an electric field, then watch and measure what happens, tagging DNA molecules with f...

USGS Finds That Mysterious Arkansas Bald Eagle Disease Has Spread To Ducks In Eastern States

...ncoordinated or paralyzed." Thomasused an electron microscope to determine that the spaces are caused byseparation of the myelin layers that surround nerve fibers. Using the sametechniques, Dr. John Fisher, a SCWDS pathologist, confirmed the lesion in aNorth Carolina mallard and ringnecked duck, and a Strom Th...

'Bugscope' Gives Internet Users Anywhere Chance To Study Insects

...ages of the bugs under study. A scanning electron microscope uses sophisticated technology to examine thethree-dimensional structure of surfaces ingreat detail. Students can see bug parts that are undetectable to the naked eye.Bugscope can serve as a jumping-off point formany in-class projects, such as a thoro...

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