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  • Phys.org - artificial blood vessels
    highway of blood vessels that twists and turns inside our bodies delivering essential nutrients and disposing of hazardous waste to keep our organs working properly has been a conundrum for scientists trying May 31 2014 in Biochemistry 0 1 Graphene coated heart valves could sidestep harmful drugs Every year thousands of people are fitted with artificial heart valves to replace their own malfunctioning valve Many of these patients however have to remain on drugs that stop blood clotting on these artificial valves Feb 18 2014 in Materials Science 0 1 From molecules to gallons Scaling up fuels created by artificial photosynthesis Phys org Artificial photosynthesis is a dream technology that mimics a natural leaf converting water and carbon dioxide into fuels with sunlight But before this technology can take flight scientists will have to solve Apr 24 2013 in Engineering 0 1 Microscale medical sensors inserted under skin can be powered wirelessly by external handheld receiver Implantable electronic devices potentially offer a rapid and accurate way for doctors to monitor patients with particular medical conditions Yet powering such devices remains a fundamental challenge batteries are bulky Mar 27 2013 in Engineering 0 0 Bacteria make the artificial blood vessels of the future The cellulose produced by bacteria could be used for artificial blood vessels in the future as it carries a lower risk of blood clots than the synthetic materials currently used for bypass operations reveals a thesis from Dec 22 2009 in Medical research 0 0 Bioengineered materials promote the growth of functional vasculature new study shows Regenerative medicine therapies often require the growth of functional stable blood vessels at the site of an injury Using synthetic polymers called hydrogels researchers at the Georgia Institute of Technology have been Dec 21 2009 in Medical research 0 1 Subscribe to

    Original URL path: http://phys.org/tags/artificial+blood+vessels/ (2016-02-13)
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  • Phys.org - mammalian cells
    such as yeast when genetic material becomes damaged the affected DNA strands increase their motion waving about inside Nov 05 2015 in Cell Microbiology 81 16 Why some genes are highly expressed The DNA in our cells is folded into millions of small packets like beads on a string allowing our two meter linear DNA genomes to fit into a nucleus of only about 0 01 mm in diameter However these molecular beads called Nov 05 2015 in Cell Microbiology 27 1 New protein nanoparticles allow scientists to track cells and interactions within them MIT engineers have designed magnetic protein nanoparticles that can be used to track cells or to monitor interactions within cells The particles described today in Nature Communications are an enhanced version of a naturally Nov 02 2015 in Bio Medicine 50 0 Molecular characteristics of mammalian melanopsins for non visual photoreception Researchers at Institute for Molecular Sciences reported that a mammalian photoreceptive protein melanopsin spontaneously releases the chromophore retinal The property would be important to regulate non visual photoreception Oct 08 2015 in Biochemistry 12 0 A barrier against brain stem cell aging Neural stem cells generate new neurons throughout life in the mammalian brain However with advancing age the potential for regeneration in the brain dramatically declines Scientists of the University of Zurich now identified Sep 17 2015 in Cell Microbiology 69 1 Yeast study yields insights into cell division cycle Studies using yeast genetics have provided new fundamental insights into the cell division cycle researchers at the University of Michigan Life Sciences Institute report Sep 01 2015 in Cell Microbiology 12 0 Cells cling and spiral like vines in first 3 D tissue scaffold for plants Miniscule artificial scaffolding units made from nano fibre polymers and built to house plant cells have enabled scientists

    Original URL path: http://phys.org/tags/mammalian+cells/ (2016-02-13)
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  • Phys.org - blood vessels
    longer roam the Earth scientists use modern animals to understand how their ancient ancestors reproduced walked and even how they regulated their body temperature While researchers continue to debate Jan 13 2016 in Plants Animals 7 0 Polymer puts new medical solutions within reach Researchers particularly those in the medical field have been searching for a way to combine the properties of liquid crystallinity with those of hydrogels Jan 11 2016 in Polymers 8 0 Tracing paths through a bottleneck Automatic tracing of filamentary structures in medical images could improve drug screening and clinical diagnosis and might also be useful for image analysis in other fields Software to perform this complex task has been Dec 17 2015 in Computer Sciences 8 0 Shining a light on chicken embryo health can reduce costs prevent spread of disease Checking on bird embryos might just have gotten easier A research team from Daegu Gyeongbuk Institute of Science and Technology DGIST South Korea have demonstrated a new way of monitoring the blood flow of bird embryos Dec 15 2015 in Optics Photonics 9 0 Researchers use 3 D printing to build human physiology outside the body The cardiovascular system is a complex web of tens of thousands of miles of arteries capillaries and veins branching throughout the body like tributaries of a great river And now researchers at Lawrence Livermore National Dec 03 2015 in Engineering 214 0 Why are the endangered dolphins of Hong Kong pink Take a trip around Lantau island in Hong Kong and you might see something surprising a pod of pink dolphins Technically they re known as Chinese or Hong Kong white dolphins and are a variety of the Indo Pacific humpbacked Dec 02 2015 in Ecology 53 0 1 2 3 4 5 6 7 8 Next Blood

    Original URL path: http://phys.org/tags/blood+vessels/ (2016-02-13)
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  • Phys.org - blood cells
    coatings differentially alter cell proliferation and attachment in vitro and in vivo A group of researchers led by Dr James Dunn out of the University of California Los Angeles UCLA are pleased to announce publication of their research in an upcoming issue of the journal Technology The report part of Feb 02 2016 in Materials Science 9 0 Block copolymer hydrogels as multifunctional effective cryoprotecting agents for red blood cells Freezing of medical tissue and cells usually requires the addition of cryopreservatives although the added compounds can have undesired effects in subsequent applications In the journal Angewandte Chemie British scientists Jan 29 2016 in Materials Science 30 0 Study offers new insights into Group A Streptococcus One bacterial pathogen is responsible for a range of diseases from pharyngitis and impetigo to more severe diagnoses such as toxic shock syndrome and necrotizing fasciitis flesh eating disease a serious bacterial skin Jan 28 2016 in Cell Microbiology 9 0 Germs humans and numbers New estimate revises our microbiome numbers downwards How many microbes inhabit our body on a regular basis For the last few decades the most commonly accepted estimate in the scientific world puts that number at around ten times as many bacterial as human cells In research Jan 28 2016 in Cell Microbiology 9 0 Adjusting production processes in real time Industry 4 0 requires comprehensive data collection in order to control highly automated process sequences in complex production environments One example is the cultivation of living cells But digitalizing and networking Jan 28 2016 in Engineering 16 0 Clarifying the mechanism for making blood cells In 1917 Florence Sabin the first female member of the US National Academy of Sciences discovered hemangioblasts the common precursor cells for blood cells and blood vessel endothelia Her discovery faced a great deal

    Original URL path: http://phys.org/tags/blood+cells/ (2016-02-13)
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  • Phys.org - white blood cells
    being the first human to walk on Mars for today s youngsters such ambitions could really materialise as humankind steps closer to the next cosmic frontier Nov 23 2015 in Space Exploration 10 0 Nanoparticle delivery maximizes drug defense against bioterrorism agent Scientists from the California NanoSystems Institute at UCLA have developed a nanoparticle delivery system for the antibiotic moxifloxacin that vastly improves the drug s effectiveness against pneumonic tularemia a type Nov 06 2015 in Bio Medicine 65 0 Sound waves levitate cells to detect stiffness changes that could signal disease Utah Valley University physicists are literally applying rocket science to the field of medical diagnostics With a few key changes the researchers used a noninvasive ultrasonic technique originally developed to detect microscopic Nov 04 2015 in General Physics 69 0 Factor found to balance medically useful stem cell qualities A key protein controls stem cell properties that could make them more useful in regenerative medicine according to a study led by Mount Sinai researchers and published online today in the journal Cell Stem Cell Oct 29 2015 in Cell Microbiology 57 0 Blocking differentiation is enough to give cells stemness Though immune therapy and regenerative medicine are promising areas of research for future medical therapies they are limited today by the difficulty of creating stem cells and scientists around the world are searching Oct 22 2015 in Cell Microbiology 16 0 1 2 3 4 5 6 7 8 Next White blood cell White blood cells WBCs or leukocytes also spelled leucocytes are cells of the immune system defending the body against both infectious disease and foreign materials Five different and diverse types of leukocytes exist but they are all produced and derived from a multipotent cell in the bone marrow known as a hematopoietic stem cell Leukocytes

    Original URL path: http://phys.org/tags/white+blood+cells/ (2016-02-13)
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  • Phys.org - hematopoietic stem cells
    infections and inflammation can deplete May 21 2013 in Cell Microbiology 0 0 Regulating hematopoietic differentiation Blood cells originate from a small pool of hematopoietic stem cells HSCs through a complex process of differentiation steps that are tightly regulated at the transcriptional level Dissecting the mechanisms underlying this Oct 05 2012 in Cell Microbiology 0 0 The Yin and Yang of stem cell quiescence and proliferation Not all adult stem cells are created equal Some are busy regenerating worn out or damaged tissues while their quieter brethren serve as a strategic back up crew that only steps in when demand shoots up Now researchers Jul 19 2012 in Cell Microbiology 0 0 Researchers parse the origins of hematopoietic stem cells Researchers at the University of California San Diego School of Medicine have identified a gene and a novel signaling pathway both critical for making the first hematopoietic stem cells HSCs in developing vertebrate embryos Jun 08 2011 in Cell Microbiology 0 0 Researchers develop platform to monitor hematopoietic stem cells A Canadian research team has developed an automated microfluidic cell culture platform to monitor the growth survival and responses of hundreds of hematopoietic stem cells HSCs at the single cell level May 22 2011 in Cell Microbiology 0 0 Prostate cancer spreads to bones by overtaking the home of blood stem cells Like bad neighbors who decide to go wreck another community prostate and breast cancer usually recur in the bone according to a new University of Michigan study Mar 23 2011 in Cancer 0 0 1 2 3 4 Next Hematopoietic stem cell Hematopoietic stem cells HSCs are multipotent stem cells that give rise to all the blood cell types including myeloid monocytes and macrophages neutrophils basophils eosinophils erythrocytes megakaryocytes platelets dendritic cells and lymphoid lineages T cells B

    Original URL path: http://phys.org/tags/hematopoietic+stem+cells/ (2016-02-13)
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  • Phys.org - mechanical properties
    new way to use atomic force microscopy to rapidly measure the mechanical properties of cells at the nanometer scale an advance that could pave the way for better understanding immune disorders Dec 17 2015 in Nanophysics 105 0 Research sheds light on sensor material behavior in harsh environments Surface characterization is important for determining how materials interact with their environment Researchers rely on their understanding of how surfaces behave in order to improve the performance of materials being incorporated Dec 15 2015 in Nanophysics 5 0 Researchers develop flexo electric nanomaterial Researchers at the University of Twente s MESA research institute together with researchers from several other knowledge institutions have developed a flexo electric nanomaterial The material has built in mechanical Nov 17 2015 in Nanophysics 89 0 New technique using existing technologies allows unprecedented views of cells and other soft materials Tufts researchers have pioneered a new way to study the properties of cells at unprecedented resolutions and speed allowing them to examine more precisely for example the differences between cancer cells and healthy ones Nov 06 2015 in Nanophysics 68 0 Researchers develop novel 3 D printing method for creating patient specific medical devices We ve all seen pictures of premature babies in neonatal care units tiny beings some weighing just a bit over a pound with plastic tubes snaking through their nose or mouth or disappearing into veins or other parts of Oct 27 2015 in Materials Science 51 0 Haze particles cause abrasive damage on frequently used industrial alloys Rapid economic growth and urbanization in developing countries are accompanied by serious particulate air pollution i e haze The haze has raised worldwide concerns regarding its impacts on visibility human health and Oct 14 2015 in Environment 16 0 1 2 3 4 5 6 7 8 Next DNA structure DNA structure shows a variety of forms both double stranded and single stranded The mechanical properties of DNA which are directly related to its structure are a significant problem for cells Every process which binds or reads DNA is able to use or modify the mechanical properties of DNA for purposes of recognition packaging and modification The extreme length a chromosome may contain a 10 cm long DNA strand relative rigidity and helical structure of DNA has led to the evolution of histones and of enzymes such as topoisomerases and helicases to manage a cell s DNA The properties of DNA are closely related to its molecular structure and sequence particularly the weakness of the hydrogen bonds and electronic interactions that hold strands of DNA together compared to the strength of the bonds within each strand Experimental techniques which can directly measure the mechanical properties of DNA are relatively new and high resolution visualization in solution is often difficult Nevertheless scientists have uncovered large amount of data on the mechanical properties of this polymer and the implications of DNA s mechanical properties on cellular processes is a topic of active current research It is important to note

    Original URL path: http://phys.org/tags/mechanical+properties/ (2016-02-13)
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  • A turning point in the physics of blood
    credible to medical practitioners That is especially challenging for a researcher who deals in computer simulations because a simulation simply can t factor in every single variable without requiring a prohibitive amount of computing resources However Graham says that capturing the physical nuances of blood vessels shape size and relative stiffness has tremendous value even given the myriad other forces at work in the human body We d like to be able to convince practitioners that you don t have to worry about all the details to capture the fundamental understanding of what s going on Graham says It s extremely challenging to incorporate all the phenomena that might be important into a simulation You have to make your case convincingly if you want somebody to apply this research that you ve kept the important parts Both researchers point out that sickle cell anemia has long been understood as both a mechanical and a biological problem The defective red blood cells the disease causes are not only misshapen but also stiffer than healthy red blood cells meaning they block blood flow Yet on a more detailed mechanical level Graham and Lam say it may even be that sickle cells literally poke and irritate the inner walls of blood vessels If so that would make sickle cell anemia not just a blood disorder but a disorder of the entire circulatory system Their combined research strengths now create an opportunity to test that hypothesis Biologists and hematologists have known for decades that these cells can get stuck but what is less understood is that the blood vessel walls in the entire patient are really inflamed and we don t really know why Lam says The researchers say a better understanding of blood flow mechanics also could help to make blood transfusions safer Transfusions can sometimes set off heart attacks or lung damage and the medical community isn t entirely sure why Lam wants to find out if certain cells in stored donated blood have mechanical properties that put patients at greater risk Though his collaboration with Lam is still in an early stage both researchers see the possibility of opening a new frontier in blood research This would be a whole new category of things we could be looking at and that s why it s so exciting Lam says Suddenly we have applications where the mechanics can be just as important Explore further Computer model predicts red blood cell flow Journal reference Physical Review Letters Provided by University of Wisconsin Madison 53 shares feedback to editors Tweet Favorites Email Print PDF Featured Last comments Popular Detection of gravitational waves would open new window on universe Feb 10 2016 58 Gravitational waves detected 100 years after Einstein s prediction Feb 11 2016 144 Physicists create first photonic Maxwell s demon 15 hours ago 3 GPS tracking down to the centimeter Feb 11 2016 10 A metal that behaves like water Feb 11 2016 2 more Phys org on facebook Relevant PhysicsForums posts

    Original URL path: http://phys.org/news/2015-05-physics-blood.html (2016-02-13)
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