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Tag: "microscopes" at biology news

Growing nerve cells in 3-D dramatically affects gene expression

... Hoffman-Kim and her team deployed high-powered microscopes to detect other differences. Cells cultured in 3-D had a rounder, more realistic shape, and their neurites ?spindly projections sprouting from the cell body ?were longer. "The cells in 3-D culture grew faster and looked more like the body's cells,...

Prehistoric mystery organism verified as giant fungus

...ections and made thousands of images taken through microscopes to determine the organism’s identity. Now Boyce, Hotton and their colleagues have produced independent evidence that supports Hueber’s case. The team did so by analyzing two varieties—isotopes—of carbon contained in Prototaxites and the plants tha...

MIT device draws cells close -- but not too close -- together

... device works without the use of tools such as the microscopes or robotic control arms typically required by MEMS devices. Because cells communicate via signals transmitted both through the touching of cell membranes and through soluble molecules that flow between separated cells, biologists need to vary the ...

Researchers image molecular motor structural changes

... up to 400,000 times their original size. Electron microscopes use beams of electrons instead of light to produce images. The images recorded on electron microscope films are two-dimensional, but three-dimensional structures of the proteins can be calculated by computer image processing. Keiko Hirose, Ph.D., a ...

New light microscope sharpens scientists' focus

... of a protein they wish to study. Ordinary optical microscopes can detect these molecules, although Hess describes their appearance under the microscope as "little fuzzy round balls." As Betzig's work in the early nineties had shown, pinpointing the center of these fuzzy balls can identify the location of the la...

Johns hopkins researchers find link between cell's energy use and genome health

... for survival. Further analysis with high-power microscopes revealed that this second enzyme, Asc2p, was residing - unexpectedly -- in the part of the cell housing its genetic material - its chromosomes - rather than in the part of the cell - the mitochondria -- that harvests energy from sugar. But why w...

Sandia work launched on space shuttle shows live cells influence growth of nanostructures

...emerged still viable after examination in electron microscopes and after X-ray exposure in Argonne National Laboratory's Advanced Photon Source, where the accelerating voltage ranges from one to 20 keV, says Brinker. Genetic modification done cheap It is noteworthy that the entrapped cells easily absorb othe...

APS lecturer shows rare video of 'teacher-student' immune cell interactions in live animal

...ut particularly advanced and powerful multi-photon microscopes using infrared beams to image fluorescent cells in...ing the technology to study the immune system. The microscopes produce optical sections through solid organs, similar to a CT-scan. Hundreds, even thousands of the...

Unraveling the viral mechanism

...velopment in addition to the powerful cryoelectron microscopes operated at very low specimen temperature and very high energy that Chiu and others use in their work that looks at different biological nano-machineries at the nanoscale. In fact, Dr. Wen Jiang, previously trained in the BCM Graduate School for Bio...

Sea coral's trick helps scientists tag proteins

...t, the light source of the laser-scanning confocal microscopes that researchers commonly use to peer into living cells can activate the tag, which should make the new tool useful to many scientists, said Sergey Lukyanov, whose lab reports on the Dendra tag in the April 2006 issue of Nature Biotechnology, publish...

New, unique microscope for nanotech

...iology now have access to one of the most advanced microscopes of its type in the world. The new Spectral Imaging Facility, opened this fall, is a combination of an atomic force microscope and a laser scanning confocal microscope, the first commercial machine of its kind. The atomic force microscope was built b...

Similar Stem Cells In Insect And Human Gut

...ticella recoils, France and colleagues used modern microscopes and tools to measure the force and speed of the spring. This is one powerful engine, France reports. The spasmoneme's contraction is measured in nano-newtons of force and centimeters/second of speed in a biological world where the ruler markings are ...

Are U.S. Flu Death Figures More PR Than Science?

...ticella recoils, France and colleagues used modern microscopes and tools to measure the force and speed of the spring. This is one powerful engine, France reports. The spasmoneme's contraction is measured in nano-newtons of force and centimeters/second of speed in a biological world where the ruler markings are ...

Nano springs eternal; Protozoan 'engine' posts nano records

...ticella recoils, France and colleagues used modern microscopes and tools to measure the force and speed of the spring. This is one powerful engine, France reports. The spasmoneme's contraction is measured in nano-newtons of force and centimeters/second of speed in a biological world where the ruler markings are ...

New law for resolution allows unprecedented sharpness in fluorescence microscopy

...en verified it in experiments. Unlike in the light microscopes conceivable so far, in a STED microscope, the relevant focal fluorescence spot can, in principle, be reduced in size to the size of a molecule (2-5 nm). This is due to the fact that the spot size is no longer subject to Abbe's formula, but to a new l...

Decisions, decisions: Male or female?

... Wawersik, the Johns Hopkins team used specialized microscopes at the university's Integrated Imaging Center to look at certain molecules and cell types in fruit fly embryos. Though they already knew that the JAK/STAT pathway was an important means of various types of cell-to-cell communication, they discovered ...

Duke Chemists Isolating Individual Molecules Of Toxic Protein In Alzheimer's, Parkinson's Disease

...in polymers known as amyloid fibrils. Atomic force microscopes use a sharp microscopic tip to image surfaces and detect energy differences by mechanically probing molecular surfaces. In a poster presentation at the American Chemical Society's annual meeting, the researchers will describe the first biophysical a...

DNA Molecules Used To Assemble Nanoparticles

.... A series of experiments using cell sorters, 3-D microscopes and other tools verified that these dendrimers hit their targets, were admitted into the cells and gave off their signaling light. The self-assembled dendrimer clusters were shown to be well formed and functional. "This is the proof-of-concept exper...

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