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Tag: "cavities" at biology news

Navigable nanotransport

...together, they form an empty sphere with many tiny cavities on its surface. These "pockets" can be filled with certain nitrogen-containing biomolecules, such as spermine, in a very stable fashion. The Korean researchers coupled spermine to the vitamin folic acid and packed these hybrid molecules into the c...

Protein found to shield pancreatic cancer cells from self-destruction

...agy in the cancer cells, which became riddled with cavities called vacuoles. When autophagy occurs, a double membrane forms around a cell organ, or organelle. This autophagosome then merges with a digestive organelle called a lysosome and everything inside is consumed, leaving the vacuole and a residue of ...

Chimpanzees found to use tools to hunt mammalian prey

...btain lesser bushbabies (Galago senegalensis) from cavities in hollow branches or tree trunks. Bushbabies are nocturnal prosimians that retire to such hidden cavities during the day. Although there was only one successful attempt in 22 recorded instances of the ch...

Scientists re-grow dental enamel from cultured cells

...scaffolds were then transferred into the abdominal cavities of rats, where conditions were favorable for the cells in the scaffolds to interact and develop. When removed after 4 weeks, the remnants of the scaffolds were found to contain enamel-like tissue. The key finding of this study was that even after the...

Encouraging results in pancreatic cancer research

...inistered over a two-week period in the peritoneal cavities of mice containing simultaneously transplanted tumors, PNC-28 caused complete destruction of these tumors. When delivered concurrently with tumor implantation, PNC-28 completely blocked tumor growth during the two-week period of administration and...

Hopkins scientists link immune response to 'ghost' parasites and severely congested sinuses

... "The epithelial cells lining the nasal and sinus cavities play an important role as first responders of the immune system," he says. "But when they are distracted fighting non-existent parasites, they cannot deal well with the very real microbes continuously coming into the nose." This, Lane notes, may...

Two-faced protein can stop metastasis or promote it, researchers say

...-like layer covering the inside of organs and body cavities and the outside skin of humans. "E-cadherin holds a human's cells and tissues together," Anastasiadis says. The other cadherins featured in this study belong to a group that collectively is called "mesenchymal" cadherins, which provide a looser bond...

Targeted virus compels cancer cells to eat themselves

...rus in the cell nucleus and autophagic vacuoles -- cavities with residual digested material. The cells showed no sign of having been killed by apoptosis -- a much better known process of programmed cell death. A normal biological defense mechanism that systematically kills defective cells, apoptosis is supp...

Report focuses on the role good microbes play in future medicine

...teria to prevent the growth of bacteria that cause cavities and gum disease. Probiotics also help prevent disease by interacting with and strengthening the immune system. "Exposure to commensal organisms is necessary for the appropriate development of both the innate and acquired immune systems. Once est...

Snakes' virtual glasses, leopard spots and all-optical transistors

... on terrorized passengers and crew thanks to small cavities near their snouts known as pit organs. The organs are sensitive to the infrared radiation emitted by warm prey such as rats, rabbits, and Samuel L. Jackson. An optical analysis of pit organs suggests that snakes shouldn't be able to use the organ to ...

New egg freezing technique offers hope to hundreds of women

...ome eggs showed the development of vacuoles (small cavities that sometimes contain water, food or metabolic waste) in their cytoplasm. When TEM was used, more differences became apparent. These included: changes to the linkages between mitochondria (microscopic respiratory structures in the cytoplasm) and i...

Bones hold the key to blood renewal

...icine. Bones are really two systems in one. The cavities inside bones are filled with spongy bone marrow, in which stem cells divide and their daughter cells differentiate into all kinds of blood cells, including large numbers of immune cells for the body's defense. The hematopoietic (literally, blood-crea...

New MRI technique shows emphysema in asymptomatic smokers

...he size of the air sacs (or "airspaces") increase, cavities form in the lung tissue, hindering oxygen delivery. According to the American Lung Association, over 3 million people in the United States have been diagnosed with emphysema, and millions more are in the early stages of the disease before signs and s...

Study reveals classic symbiotic relationship between ants, bacteria

... house the bacteria in specialized, highly adapted cavities and nourish them with glandular secretions-an indication that the ants, bacteria, fungus and parasites have likely been evolving together for tens of millions of years. "Every ant species [that we have examined] has different, highly modified struct...

'Banana-jawed' fossil mammal linked to rare sound-producing skill

... built models of dinosaur sound-producing skeletal cavities that have enabled scientists to reconstruct the possible sounds made by them. Now, DeBlieux would like to do the same for the fossil hyrax. "It would be really neat," he said, "to model their jaws so we could hear the sound these curious creatures a...

Pillows - a hot bed of fungal spores

...ould be problematic. It can also get into the lung cavities created by tuberculosis which affects a third of the world's population, causing general ill-health and bleeding in the lung, as well as causing a range of plant and animal diseases. Dr Geoffrey Scott, Chairman of the Fungal Research Trust which fu...

Give thanks for the cranberry, say dental researchers

... making it difficult for the bacteria that causes cavities to cling to tooth surfaces. Stickiness is everythi...e microbe Streptococcus mutans, which creates most cavities by eating sugars and then excreting acids that cause dental decay. "Scientists believe that one of ...

Researchers find Amchitka seafood safe for now

...to the sea of any nuclear material that leaves the cavities created by the nuclear test shots will travel more...y known technology to address the radioactive shot cavities themselves; hence future surveillance is needed and the study serves to provide baseline data for th...

U-M scientists discover identifying markers for primitive blood-forming stem cells

...alled osteoblasts, which line the inside of hollow cavities in bone that contain bone marrow. Using SLAM markers, we discovered hematopoietic stem cells also congregate in the sinusoidal endothelium ?porous cells lining the inside of blood vessels that carry oxygen throughout bone marrow and the spleen. "The...

Hidden sponges determine coral reef's nutrient cycle

... more than 60 percent of the cavities. Further the cavities were found to have a surface area eight times greater than that of the coral reef, as seen from above by divers. Filterers And according to Scheffers a larger living surface also means a larger filtering surface. Sponges filter the water. They ta...

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