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Tag: "probe" at biology news

How plants avoid feeling the burn

...ping a new insulating coat of polyethylene for the probe tip of a Scanning Tunneling Microscope (STM), which is used to measure the electron flow across single molecules. Also, the chemical ends of the carotenoids had to be modified so they could chemically stick to the STM probe's gold tipped electrodes. ...

Study reveals how ADHD drugs work in brain

... prescribed in humans. Then, using a type of brain probe - a process known as microdialysis - the UW-Madison team measured concentrations of dopamine and norepinephrine in the three different brain areas, both in the presence and absence of low-dose ADHD stimulants. Under the influence of ADHD drugs, dopa...

Is the brain wired for faces?

...ecause we are now going to apply this technique to probe the neural bases of face perception deficits in autism," Riesenhuber said. Because humans are so talented in recognizing faces, many in the scientific community have argued that the brain has developed unique mechanisms for understanding and disting...

Berkeley researchers lay groundwork for cell version of DNA chip

...ded DNA on the surface of a chip and using it as a probe to identify genetic matches is a well-established technology, this is the first time that single-stranded DNA has been attached to the surface of a biological cell. Chandra and his co-authors accomplished this feat through the adaptation of a techni...

Rewind, please: Nature paper shows that cell division is reversible

...b can work toward developing innovative methods to probe and better understand the complex process of cell division." Gorbsky heads the Molecular, Cell and Developmental Biology Research Program at OMRF and holds both an M.A. and a Ph.D. in biology from Princeton University. He is also adjunct professor ...

Intensive statin therapy may partially reverse plaque build-up in arteries

...und (IVUS), a technique in which a tiny ultrasound probe is inserted into the coronary arteries to measure plaque. The study showed that regression occurred for all three pre-specified IVUS measures of disease burden. The mean baseline LDL cholesterol of 130.4 mg/dL dropped to 60.8 mg/dL in the study pati...

UCLA scientists uncover mechanism of response to targeted therapy

...evels of HIF, would take in a standard PET imaging probe at high levels. If that proved true, the PET scan ...rs after treatment with CCI-779, intake of the PET probe levels dropped in the cancer cells, meaning HIF levels were falling and the drug was working. "If w...

Study suggests that publicly available genome data may contain small but significant errors

...orrection. Comparing data from their inferred probe maps to the available sequence assembly, the new method provides insights into the difficulties of establishing a canonical and accurate sequence or physical map, and suggests ways that the two types of data can be combined to render increased confid...

Unique equine cataract surgery offered on routine basis

...ne. The teams remove the lens using an ultrasound probe and administered an injection of intravitreal steroids to control postoperative inflammation of the eye. Professor Knottenbelt said: "This new surgery shows how effectively the latest human cataract surgical techniques can translate successfully ...

Detection of DNA on nanotubes offers new sensing, sequencing technologies

...ces through hybridization with a complementary DNA probe has many potential applications in medicine, microbiology and environmental science," said Esther Jeng, a graduate student at Illinois and the paper's lead author. "For example, this system could be used in genomic screening to detect sequences that ...

Rochester scientists develop fast-working biosensor

...oli in the sample being tested. The binding of the probe and the bacteria alters the surface of the chip. A digital camera image of the chip captures the changes for analysis and confirmation of detection. Traditional methods of detection of bacteria can take days. "This takes as much time as it takes for...

Clawed frog helps Fanconi anemia research make leaps

...g the BB-sized, black-and-white, bead-like eggs to probe orchestration of the DNA replication process, something not as easily done in mammalian cells. Since a Xenopus egg isn't fertilized until after it is laid outside the body of the female frog, it's in a relative state of suspension until it is ferti...

Cellular scale drug delivery from the inside out

...e's no limit to the depth of tissue we are able to probe ?think of an MRI." Beyond the possibilities for intercellular drug delivery, the nanospheres may provide the key to studying what takes place within a cell. Currently, scientists have difficulty introducing chemicals or genes into cells without eith...

Rare Tibetan antelope listed as endangered

...n monitor the heart with a 2D ultrasound endoscope probe down the throat, a method that requires general anesthesia. "If physicians instead used the laparoscopic ultrasonography imager, they could monitor function for hours through a tiny incision -?possibly without anesthesia," Smith said. "That would be...

3D ultrasound device poised to advance minimally invasive surgery

...n monitor the heart with a 2D ultrasound endoscope probe down the throat, a method that requires general anesthesia. "If physicians instead used the laparoscopic ultrasonography imager, they could monitor function for hours through a tiny incision -?possibly without anesthesia," Smith said. "That would be...

New nanosensor uses quantum dots to detect DNA

...es seek out and bind to the target DNA. Each DNA probe also has an important partner. Attached to one is ...ws when it receives energy. Attached to the second probe is a molecule called biotin. Biotin sticks to yet another molecule called streptavidin, which coats ...

T-rays: New imaging technology spotlighted by American Chemical Society

...he said. "In the future we will use this method to probe photosynthetic and bacterial reaction centers, and perhaps DNA." ...

ASU researchers 'wire' DNA to identify mutations

...electrode tip, a small current, or bias is used to probe the internal electronic states of DNA. By measuring the conductance, the team was able to understand the sequence information in the DNA and whether there was a mismatch in comparison to a normal DNA sequence. What they found was that just a single...

New, unique microscope for nanotech

... the atomic force microscope can also be used as a probe to nudge cells, or place atoms or molecules into new, microscopic patterns. The project includes 24 UC Davis faculty from the departments of Chemistry and of Physics; the colleges of Engineering, Agricultural and Environmental Sciences, and Biologic...

New technique helps researchers determine amino-acid charge

...atch-clamp technique, the researchers were able to probe the electrostatic properties of the inner lining of the ion-channel's pore, and, from there, they inferred the rotational angle of the pore-lining alpha-helices in the open state. In this case, researchers focused on the muscle nicotinic acetylcholi...

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