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Capillary in Biological News

Capillary mats labor-saving, economical alternative to hand watering

... into the containers on top. One advantage of capillary mats is that plants of different size and water ... spend as much time watering plants. The downside: capillary mats can be an expensive system to set up and ... research team from the University of Arizona used capillary mats and overhead sprinkler irrigation in a ...

GEN reports on growing reliance on microfluidics technology

... druggable enzymes. It combines the advantages of capillary electrophoresis with microfluidics technology for ... filter separates cells from plasma. Next a capillary directs the sample into a chamber that contains ... of the array, the sample next flows down a capillary path and interacts with an antibody array. The ...

Normalizing tumor vessels to improve cancer therapy

... and too little to another. In addition, the capillary endothelial cells lining the inner surface of ... by Ingber and colleagues have shown that a capillary cell's sensitivity to soluble angiogenic factors ... are malformed, Ghosh wondered whether tumor capillary cells have lost the normal cells' ability to ...

MIT works toward engineered blood vessels

... a surface that can serve as a template to grow capillary tubes aligned in a specific direction. The ... grown on a flat surface, which form a network of capillary tubes extending in random directions, cells grown ... of it, he said. The next step is to implant capillary tubes grown in the lab into tissues of living ...

Jet-propelled imaging for an ultrafast light source

... of a meter or less. In their nozzle, liquid flows through a narrow capillary inside the tube through which the gas flows; the liquid issues from the capillary some distance from the opening in the outer tube, so the gas surrounds it, ...

Where optics meets medicine

... in the retina. A series of photographs is taken to document the capillary network and reveal defects or changes. If vessels are damaged or abnormal, ... alignment," Burns says. Presentation FWW6, "Constructing Human Retinal capillary Maps from Adaptive Optics SLO Imaging," Wednesday, Oct. 22, 5:15 p.m., ...

New oral angiogenesis inhibitor offers potential nontoxic therapy for a wide range of cancers

... for a small number of specific cancers. In contrast, Lodamin prevented capillary growth in response to every angiogenic stimulus tested. Moreover, in mouse ... -- the cells changed their shape by rounding, a behavior that inhibits capillary cell growth. Ingber cultured the fungus, disregarding lab policy, which ...

MIT solves gravity-defying bird beak mystery

... per second. The efficiency of the process, which the authors dub the capillary ratchet, depends on the beak shape: Long, narrow beaks are best suited to ... degrees can change the drop speed by a factor of 10, Quere said. The capillary ratchet also depends critically on the beak's wettability--a measure of a ...

Findings a step toward making new optical materials

... out of the trough, the particles are pushed into the template holes by capillary force, the same phenomenon that causes water to rise to a higher level in ... so that water can draw the particles into the holes in the template using capillary force, Won said. Researchers found that it was essential to control ...

Cells get sprayed

... in mass spectrometry. In this process, the tip of an extremely fine steel capillary is put under a high voltage. A highly charged drop of water exits the capillary and is atomized into many micro- or nanoscopic droplets. These charged ...

Alternative methods proposed to detect pesticides and antibiotics in water and natural food

... Analysis (FIA) and High Performance Liquid Chromatography (HPCL), or capillary Electrophoresis (CE) with UV/Vis detection using an online preconcentration technique in the capillary itself, or detection via Mass Spectometry (MS). MS can also unequivocally ...

American Chemical Society's Weekly PressPac -- Sept. 12, 2007

... an instrument, about the size of a briefcase, based on a modified form of capillary electrophoresis, a mainstay technology for separating components in a ... Explosive Devices by Analysis of Postblast Residues Using Portable capillary Electrophoresis Instrumentation and Indirect Photometric Detection with a ...

Laughing hyenas, wailing levees, the sound of cheese and blaring bagpipes

... substances such as soil, a granular material with tiny constituent particles that interact amongst themselves. When water is also present in soil, capillary (suction) forces are at work too. Sound waves can be sent into soil to measure properties such as porosity, temperature, and water content. This kind ...

Blood testing, mosquito style

... This means patients would experience little or no pain. The patch could be worn anywhere on the body where it could obtain accurate readings of capillary blood. A sensor in each cell of the e-Mosquito measures sugar levels in the blood. This data can then be sent wirelessly to a remote device such a ...

A missing enzyme conveys major heart protection in pre-clinical work

... reductase) the blood was able to get around the blockage point that normally would cut off blood to the heart because of remarkable capillary growth in these animals. "There were blood vessels everywhere in these mice born without the enzyme," said Jonathan Stamler, M.D., a Duke ...

Symposium to look at genetic basis of exercise

... at thrombospondin, a gene that limits the growth of small blood vessels, known as capillaries, in the muscles. Removing the gene allows greater capillary growth. The more capillaries in the muscle, the more oxygen the muscle will have available during exercise. In one study, Olfert compared ...

New light shed on marine luminescence

... contraction and relaxation. Nitric oxide is also thought to play an important role in the bioluminescence of krill. It is produced in the small capillary vessels that keep the krill's photocytes supplied with oxygen, as well as in special closure muscles, sphincters, that are located at the point where ...

MIT: Safe storage of greenhouse-gas carbon dioxide

... capacity," Szulczewski said. "Other methods suffer from major shortcomings of accuracy, complexity or scale." Juanes studies a phenomenon called capillary trapping, through which CO 2 , liquefied by the pressure of the Earth, is trapped as small blobs in the briny water (picture bubbles of oil in ...

Cardiac cell transplant studies show promise in cardiac tissue repair

... at replenishing damaged cardiovascular tissue," concluded Sartore and his team. "While the two MSCs can contribute roughly at the same extent to capillary formation, AF-MSCs are not able to participate in the formation of arterioles and hence to vascular SMCs (smooth muscle cells)." Sartore noted that ...

Certain anticancer agents could be harmful to patients with heart disease

... be required to maintain blood vessels elsewhere in the body. That means it could also be uniquely important in the brain, which has a very dense capillary network, and that drugs that increase hedgehog signaling could possibly be useful to treat strokes. Lavine, who has just graduated from the ...

OSU technologies funded for development

... vessel wall and the surrounding tissue to study the migration and differentiation of immune cells associated with diabetes. By using human retinal capillary endothelial cells within the tissue model, Fahlenkamp plans to develop a retinal angiogenesis model, which will be used to screen potential diabetic ...

New clues to how proteins dissolve and crystallize

... even so, the preliminary results were promising." With liquid microjet technology, precisely mixed chemicals flow rapidly through a fused silica capillary shaped to a fine tip, a nozzle with an opening only a few micrometers (millionths of a meter) in diameter. The resulting liquid jet travels through a ...

Micro-origami: USC folds up micrometer-scale 'voxels' for drug delivery

... Then the folding had to be accomplished. First the researchers bent the hinges by application of magnetic force to the permalloy. Water pressure and capillary forces generated by submerging the tiny blanks in water, and drying them off did the final folding into shape. The experiments spend considerable ...

Hyperviscous fluids: Better treatment for severe blood loss

... a professor of bioengineering at the Jacobs School of Engineering, reported that the new approach sharply improved the animals functional capillary density, a key measure of healthy blood flow through tissues and organs. Of course, trauma physicians want to get the blood flowing as soon as ...

Needle-size device created to track tumors, radiation dose

... a new technology is needed to tell doctors the exact dosage of radiation received by a tumor," Ziaie said. The prototype is enclosed in a glass capillary small enough to inject into a tumor with a syringe, said Ziaie, who has a dual appointment in Purdue's Weldon School of Biomedical Engineering. ...

Why diving marine mammals resist brain damage from low oxygen

... The conventional wisdom was that they had evolved physiological adaptations that increased the delivery of oxygen to the brain--for example, higher capillary density and blood flow that could be shunted preferentially to the brain. But despite such adaptations, blood oxygen levels still plummet after just ...

Elevated nitric oxide in blood is key to high altitude function for Tibetans

... Research Center at the Cleveland Clinic. The combined increase in NO and blood flow levels resulted in double the amount of oxygen delivered to the capillary beds in the Tibetans arms. The researchers hypothesize that Tibetans have a genetic mutation that allows high NO production. Genetic studies and ...

New test could help consumers avoid surprise headaches from chocolate, wine

... Having a quick testing kit could ultimately save lives in these individuals, Mathies suggests. The new technique, called portable microchip capillary electrophoresis, involves labeling the sample with a fluorescent dye, separating the components by applying an electric field on a special microchip, ...

Study finds blocking angiogenesis signaling from inside cell may lead to serious health problems

... and form an interface between circulating blood and the vessel wall. Endothelial cells line the circulatory system from the heart to the smallest capillary and reduce friction of the flow of blood. Iruela-Arispe and her team didnt expect to see much of an effect because the amount of VEGF made inside ...

Plant genes identified that can form basis for crops better adapted to environmental conditions

... the genes that are essential for the formation of capillary roots. For the first time, they are unraveling ... growth and development. The mystery of capillary root formation Root systems absorb nutrients ... growth and further development. The formation of capillary roots is vital to the root system and determines ...

NHGRI expands effort to revolutionize sequencing technologies

... to Sanger sequencing and a highly parallel, capillary electrophoresis separation system. Greg ... "$100,000 Genome Using Integrated Microfluidic capillary Electrophoresis" This group will work to ... and PCR as compared to that attainable using capillary electrophoresis systems. To do so, it will ...

MIT designs portable 'lab on a chip'

... and scales poorly with miniaturization. The second approach is capillary electro-osmosis, where flow is driven by an electric field across the ... said. Instead of placing electrodes at each end of the channel, as in capillary electro-osmosis, the voltage can be lowered substantially with alternating ...

Potential heart benefit found in stem cells

... cells." Effect of Stem Cells on Left Ventricle Wall Thickness and capillary Density in Pigs Following Myocardial Infarction (Abstract 829-3) Stem ... and the same difference was seen in the border zones (11.2 vs. 8.6 mm). capillary density in the border zones of the ADSC group was also significantly ...

New mitochondrial DNA gene chip may be early cancer diagnosis tool

... of the EDRN. The lab found that full mitochondrial genome sequencing using capillary electrophoresis detected mtDNA changes associated with early cancer. In ongoing work, NIST is comparing capillary electrophoresis methods with a newly developed DNA sequencing chip. The ...

Life detection instrument passes key test on road to Mars

... unambiguously find signs of life. The experiment uses state-of-the-art capillary electrophoresis arrays, novel micro-valve systems and portable instrument ... as is likely to be the case on Mars, the microfluidic channels in the capillary disks don't get clogged as readily as they do when used to test samples in ...

Open microfluidic and nanofluidic systems

... Such a theory has now been developed. This theory addresses the strong capillary forces between substrate material and liquid and takes the ‘freedomâ€TM ... wettability. This constraint is a direct consequence of the strong capillary forces that dominate in the micro- and nanoregime and can be formulated in ...

Now, self-healing materials can mimic human skin, healing again and again

... the coating until it encounters one of the fluid-filled “capillaries” at the interface of the coating and substrate. Healing agent moves from the capillary into the crack, where it interacts with catalyst particles. If the crack reopens under additional stress, the healing cycle is repeated. ...

Cancer-killing invention also harvests stem cells

... in hospitals today. This shunt would reside on the exterior of the arm or be implanted beneath the skin. Some of the blood flow would bypass the capillary bed and instead go into the shunt, which could remain implanted for many weeks, continually removing and killing cancer cells. King's first targets ...

Interaction between lymph and liver cells may affect immune response

... microscopy. LSECs are highly specialized endothelial cells that line the walls of hepatic sinusoid cells (gossamer-like structures that form the rich capillary network of the liver) and are perforated by fenestrations, or openings. The researchers hypothesized that the fenestrations could provide a portal ...
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