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The Lead

New 3-D printing algorithms speed production, reduce waste

October 22, 2014 7:51 am | by Emil Venere, Purdue Univ. | News | Comments

New software algorithms have been shown to significantly reduce the time and material needed to produce objects with 3-D printers. Because the printers create objects layer-by-layer from the bottom up, this poses a challenge when printing overhanging or protruding features like a figure's outstretched arms. They must be formed using supporting structures—which are later removed—adding time and material to the process.

Study: Odors, chemicals above health standards caused by “green building” plumbing

October 20, 2014 11:27 am | by Emil Venere, Purdue Univ. | News | Comments

Several types of plastic pipes in eco-friendly green buildings in the U.S. have been found to...

Ultrasound reveals secrets of deadly abdominal aortic aneurysms

October 16, 2014 7:56 am | by Emil Venere, Purdue Univ. | News | Comments

Researchers are exploring the usefulness of ultrasound imaging to study...

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Force-sensing microrobots to probe cells

October 14, 2014 7:56 am | by Emil Venere, Purdue Univ. | News | Comments

Inexpensive microrobots capable of probing and manipulating individual cells and tissue for biological research and medical applications are closer to reality with the design of a system that senses the minute forces exerted by a robot's tiny probe. Microrobots small enough to interact with cells already exist. However, there is no easy, inexpensive way to measure the small forces applied to cells by the robots, until now.

Electrically conductive plastics promising for batteries, solar cells

October 9, 2014 10:46 am | by Emil Venere, Purdue Univ. | News | Comments

An emerging class of electrically conductive plastics called "radical polymers” may bring low-cost, transparent solar cells, flexible and lightweight batteries, and ultrathin antistatic coatings for consumer electronics and aircraft. Researchers have established the solid-state electrical properties of one such polymer, called PTMA, which is about 10 times more electrically conductive than common semiconducting polymers.

Online resource provides free tools, simulations for composite materials

October 3, 2014 11:59 am | News | Comments

Individuals in industrial associations, educational institutions and government organizations who are interested in composites, or materials made from constituent materials with different physical or chemical properties, now have free, 24/7 access to simulation tools through an online community with offices in the Purdue Research Park.

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Fat molecules influence form, function of key photosynthesis protein

September 30, 2014 7:48 am | by Elizabeth K. Gardner, Purdue Univ. | News | Comments

A mysterious space within a protein critical to photosynthesis is filled with fat molecules that influence both the protein’s architecture and electrical properties, according to two recent studies. Researchers studied the atomic structure of, and electrical interactions within, the cytochrome bf complex, a protein complex central to the transport of electrons within membranes of a plant cell, a critical step in photosynthesis.

Researchers uncover structure of enzyme that makes plant cellulose

September 25, 2014 8:06 am | by Natalie van Hoose, Purdue Univ. | News | Comments

Purdue Univ. researchers have discovered the structure of the enzyme that makes cellulose, a finding that could lead to easier ways of breaking down plant materials to make biofuels and other products and materials. The research also provides the most detailed glimpse to date of the complicated process by which cellulose is produced.

Robotic fabric could bring “active clothing”, wearable robots

September 23, 2014 2:20 pm | by Emil Venere, Purdue Univ. | News | Comments

Researchers are developing a robotic fabric that moves and contracts and is embedded with sensors, an approach that could lead to "active clothing" or a new class of "soft" robots. The robotic fabric, developed at Purdue Univ.,  is a cotton material containing sensors made of a flexible polymer and threadlike strands of a shape-memory alloy that return to a coiled shape when heated, causing the fabric to move.

Startup scales up graphene production, develops biosensors and supercapacitors

September 19, 2014 10:59 am | Videos | Comments

Glenn Johnson, CEO of BlueVine Graphene Industries Inc., said many of the methodologies being utilized to produce graphene today are not easily scalable and require numerous post-processing steps to use it in functional applications. He said his company has developed a way to scale graphene production using a roll-to-roll chemical vapor deposition process.

Boosting global corn yields depends on improving nutrient balance

September 18, 2014 7:40 am | by Natalie van Hoose, Purdue Univ. | News | Comments

Ensuring that corn absorbs the right balance of nitrogen, phosphorus and potassium is crucial to increasing global yields, a Purdue and Kansas State Univ. study finds. A review of data from more than 150 studies from the U.S. and other regions showed that high yields were linked to production systems in which corn plants took up key nutrients at specific ratios.

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Findings suggest how swimming cells form biofilms on surfaces

September 12, 2014 7:59 am | by Emil Venere, Purdue Univ. | News | Comments

New research findings point toward future approaches to fighting bacterial biofilms that foul everything from implantable medical devices to industrial pipes and boat propellers. Bacteria secrete a mucus-like “extracellular polymeric substance” that forms biofilms, allowing bacterial colonies to thrive on surfaces.

Findings suggest how swimming cells form biofilms on surfaces

September 11, 2014 1:07 pm | by Emil Venere, Purdue Univ. | News | Comments

Bacteria secrete a mucus-like “extracellular polymeric substance” that forms biofilms, allowing bacterial colonies to thrive on surfaces. Costs associated with biofilms affecting medical devices and industrial equipment amount to billions of dollars annually. New research reveals specifics about interactions that induce bacteria to swim close to surfaces and attach to biofilms. This may point to future approaches for fighting biofilms.

Fingerprinting cell metabolism points toward study of obesity, diabetes

September 9, 2014 7:38 am | by Emil Venere, Purdue Univ. | News | Comments

Researchers have shown how to use a new imaging platform to map lipid metabolism in living cells, discovering specifically where cholesterol is stored and pointing toward further studies in obesity, diabetes and longevity. The imaging approach makes it possible to not only quantify the storage of cholesterol, but also the "desaturation" and oxidation of lipids, which may reduce the ability of cells to use insulin.

Robots unlikely to take big bites out of employment, expert says

September 2, 2014 11:59 am | by Steve Talley, Purdue Univ. | News | Comments

Advances in artificial intelligence and robotics mean that machines will soon be able to do many of the tasks of today's workers. But David Hummels, a professor of economics at Purdue Univ., says humans still have a unique advantage that machines may never be able to emulate: our ability to respond to other humans.

New analytical technology reveals nanomechanical surface traits

August 27, 2014 5:03 pm | by Emil Venere, Purdue Univ. | News | Comments

Researchers have discussed the merits of surface-stress influence on mechanical properties for decades. Now, a new research platform, called nanomechanical Raman spectroscopy and developed at Purdue Univ., uses a laser to measure the "nanomechanical" properties of tiny structures undergoing stress and heating.

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Vision problems for older adults can dim life expectancy

August 26, 2014 11:28 am | by Amy Patterson Neubert, Purdue Univ. | News | Comments

Older adults losing vision as they age are more likely to face an increased mortality risk, according to new research from Purdue Univ. The researchers analyzed data from the Salisbury Eye Evaluation study that tracked the vision health of 2,520 older adults, ages 65 to 84. The research was funded by the National Eye Institute.

Shale oil dividend could pay for smaller carbon footprint

August 19, 2014 8:16 am | by Natalie van Hoose, Purdue Univ. | News | Comments

Unanticipated economic benefits from the shale oil and gas boom could help offset the costs of substantially reducing the U.S.'s carbon footprint, Purdue Univ. agricultural economists say. Wally Tyner and Farzad Taheripour estimate that shale technologies annually provide an extra $302 billion to the U.S. economy relative to 2007, a yearly "dividend" that could continue for at least the next two decades, Tyner said.

Lunar-landing rocket research hits milestone with “hot-fire” test

August 13, 2014 8:00 am | by Emil Venere, Purdue Univ. | News | Comments

A Purdue Univ. student team has designed, built and tested a critical part of a new a rocket engine as part of a NASA project to develop spacecraft technologies needed to land on the moon, Mars and other cosmic venues. The students are making a central part of the new engine—called the thrust chamber or combustor—as part of NASA's Project Morpheus.

Cell signaling pathway linked to obesity, Type 2 diabetes

August 8, 2014 7:55 am | by Natalie van Hoose, Purdue Univ. | News | Comments

A Purdue Univ. study shows that Notch signaling, a key biological pathway tied to development and cell communication, also plays an important role in the onset of obesity and Type 2 diabetes, a discovery that offers new targets for treatment. The research team found that blocking Notch signaling in the fat tissue of mice caused white fat cells to transform into a "leaner" type of fat known as beige fat.

Boosting neural pathway from gut to brain could play part in weight control

July 31, 2014 7:40 am | by Amy Patterson Neubert, Purdue Univ. | News | Comments

A Purdue Univ. study found an increase in sensory nerve fibers that send signals from the gut to the brain reduces the time spent eating a meal, which could help regulate body weight. The researchers studied a mouse model with a targeted knockout of the brain-derived neurotrophic factor gene that decreases levels of this nerve growth factor in the gastrointestinal tract.

Discovery is key to metal wear in sliding parts

July 24, 2014 9:24 am | by Emil Venere, Purdue Univ. | News | Comments

Researchers have discovered a previously unknown mechanism for wear in metals: a swirling, fluid-like microscopic behavior in a solid piece of metal sliding over another. The findings could be used to improve the durability of metal parts in numerous applications.

Spinach could lead to alternative energy more powerful than Popeye

July 23, 2014 4:07 pm | by Elizabeth K. Gardner, Purdue Univ. | News | Comments

Spinach gave Popeye super strength, but it also holds the promise of a different power for a group of scientists: the ability to convert sunlight into a clean, efficient alternative fuel. Purdue Univ. physicists are part of an international group using spinach to study the proteins involved in photosynthesis, the process by which plants convert the sun’s energy into carbohydrates used to power cellular processes.

New bridge design improves quake resistance, speeds construction

July 1, 2014 3:24 pm | by Emil Venere, Purdue Univ. | News | Comments

Researchers have developed a new design for the framework of columns and beams that support bridges, called "bents," to improve performance for better resistance to earthquakes, less damage and faster on-site construction. The faster construction is achieved by pre-fabricating the columns and beams off-site and shipping them to the site, where they are erected and connected quickly.

Discovery Park center awarded grant to advance energy economy

June 23, 2014 7:47 am | by Phillip Fiorini, Purdue Univ. | News | Comments

A research center at Purdue Univ.'s Discovery Park has been awarded a $12 million, four-year grant as part of a $100 million U.S. Dept. of Energy initiative to accelerate scientific breakthroughs needed to build the 21st century energy economy. The Purdue-led C3Bio will use the additional funding to advance methods for converting plant lignocellulosic biomass to biofuels and other bio-based products.

New manufacturing methods needed for “soft” machines, robots

June 19, 2014 7:52 am | by Emil Venere, Purdue Univ. | News | Comments

Researchers have developed a technique that might be used to produce "soft machines" made of elastic materials and liquid metals for potential applications in robotics, medical devices and consumer electronics. Such an elastic technology could make possible robots that have sensory skin and stretchable garments that people might wear to interact with computers or for therapeutic purposes.

Few, if any, big impact craters remain to be discovered on Earth

June 18, 2014 8:02 am | by Elizabeth K. Gardner, Purdue Univ. | News | Comments

It’s likely that most of the large impact craters on Earth have already been discovered and that others have been erased, according to a new calculation by a pair of Purdue Univ. graduate students. Although it's known that natural processes erase craters fairly quickly from the Earth's surface, this model was the first to quantify how many craters have likely been erased.

Smartphone adapted to measure person’s gait, reduce falls

June 17, 2014 8:01 am | by Emil Venere, Purdue Univ. | News | Comments

Researchers have shown how to modify a smartphone so that it can be used to measure a person's walking gait to prevent falls in people with compromised balance, such as the elderly or those with Parkinson's disease. The innovation, being commercialized as SmartGait, is designed as a tool to aid health care officials in assessing a person's risk of falling and identifying ways to avoid injury.

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