Articles tagged with Diffusion
Researchers from Lehigh University have developed an imaging technique that allows them to directly observe light-emitting excitons as they diffuse in a new material called rubrene. This breakthrough is crucial for plastic solar cell technology, where exciton diffusion is a major challenge.
A new framework for rendering subsurface scattering on surfaces represented by points is introduced, providing a significant improvement in transparency and realism for translucent materials. The method uses two additional computation passes to simulate the light diffusion phenomenon inside multilayered materials.
Using large-scale computer simulations, researchers at Georgia Tech have identified hydrodynamic interactions as a dominant factor in intracellular diffusion, accounting for much of the reduction in molecular movement. This finding has significant implications for understanding disease states and developing therapeutic drugs.
Physicists at Rutgers University have discovered new properties in a material that could result in efficient and inexpensive plastic solar cells. The discovery reveals that energy-carrying particles generated by packets of light can travel much farther in organic semiconductors, increasing the practicality of solar-generated electricity.
Researchers at Michigan State University found that protein diffusion is slower than previously thought, which could lead to new therapeutic strategies for diseases such as Alzheimer's, ALS, and cystic fibrosis. The discovery provides a fundamental understanding of the pre-folded state of proteins.
A new guideline recommends using diffusion MRI scans instead of CT scans for diagnosing acute ischemic stroke within 12 hours. MRI scans are found to be more accurate in detecting stroke damage and identifying severity, leading to faster diagnosis and treatment.
Research in particle diffusion reveals that periodic constrictions slow down drift and diffusion under weak driving forces. In contrast, strong driving forces induce intermittent transitions between compartments, increasing the diffusion coefficient.
Scientists have developed a revised model to better understand the transport of fluid constituents, which has important roles in biology, physics, and chemistry. The new model contradicts widely accepted models and provides an improved analysis of combined advection and diffusion.
Researchers measured protein mobility in retinal rod photoreceptors and found delayed axial diffusion in each compartment compared to aqueous solution. This study sheds light on selective barriers imposed by sensory cilia.
Archaeological evidence supports the idea that maize was adopted by Southwestern hunter-gatherers through group-to-group transmission. The researchers' scenario proposes an early (7,000 B.C.) north-to-south movement of Proto-Uto-Aztecan hunter-gatherers, followed by division into northern and southern Uto-Aztecan-speaking groups.
Two studies suggest the nuclear envelope's permeability barrier reopens briefly after mitosis, allowing large proteins to enter the nucleus by passive diffusion. This dynamic process has important implications for cellular compartmentalization and genetic material regulation.
Researchers at the University of Illinois have found that Brownian motion does not always follow a Gaussian curve, as previously thought. The study reveals extreme displacements that were not predicted by Einstein's statistical molecular theory, suggesting new design possibilities and potential corrections to textbooks.
A new study published in Neurology has found that prenatal methamphetamine use is associated with abnormal brain development in children. The research used MRI scans to compare the brains of 29 children exposed to meth in utero with 37 unexposed children, revealing differences in white matter structure and maturation.
A new study published in Neurology found that prenatal meth exposure is associated with abnormal white matter structure and maturation in the developing brain. This can lead to delays in developmental milestones, increased stress and lethargy, and poorer quality of movement in infants.
Engineers at NIST have developed a method to slow down penetration of chloride and sulfate ions into concrete, reducing maintenance costs and catastrophic failures. The new technology could save billions of dollars and many lives by extending the service life of concrete.
Researchers used DTI to estimate chronic effects of optic nerve inflammation three months in advance. DTI showed a correlation between damage and lower scores on visual health tests, indicating potential predictive information for MS flare-ups.
A new study has identified several specific white matter regions and deep gray matter areas of the brain sensitive to prenatal alcohol exposure in children with Fetal Alcohol Spectrum Disorder (FASD). Diffusion tensor imaging (DTI) was used to map brain structure, revealing widespread diffusion abnormalities beyond the corpus callosum.
Researchers created a complete map of millions of neural fibers in the human cerebral cortex, identifying a single network core that may be key to understanding higher level thinking. The study provides a comprehensive map of brain connections and describes a non-invasive technique for mapping neural connections at greater resolution.
A recent study found that diffusion-weighted MRI (DWI) can predict moderate to severe chronic liver disease. The technique measured water diffusion in the liver tissue and showed promise as a non-invasive alternative to liver biopsy.
A team of scientists has developed a new method to analyze the development of cortical polarity in cell membranes, which is essential for various cellular processes. They combined experiments with living cells and a mathematical model, showing that polarized regions are defined with near-optimal precision.
A new imaging method measures water diffusion in tumors to detect early response to treatment for advanced prostate cancer. Researchers found that changes in water diffusion could predict tumor response to chemotherapy as early as seven days after treatment began.
The Dutch government excels in knowledge development and diffusion, but struggles to create a reliable market for sustainable energy. This leads to high-risk entrepreneurship and fewer technological successes.
Researchers used diffusion tensor imaging to track water molecule movement in brains of chronic back pain patients and healthy controls. Chronic back pain was associated with more directed diffusion in pain-processing regions, suggesting complex brain organization and hyperactivity.
Dr. George Papanicolaou was chosen for his significant contributions to mathematics and its applications, including imaging in random media and financial mathematics.
The Cluster quartet encountered electron diffusion regions 19 times in one hour, measuring accelerated electrons and gaining invaluable insights into the process of magnetic reconnection. This phenomenon releases energy through electron diffusion regions, which may hold the key to preventing reconnection events in nuclear reactors.
Researchers discovered that molecular motors use one-dimensional diffusion to rapidly target microtubule ends. This strategy allows for efficient and accurate localization of microtubule ends, crucial for chromosome distribution during cell division.
Researchers developed a functional diffusion map that tracks water movement in the brain, predicting tumor response to treatment. This non-invasive method identifies patients who will benefit from second-line therapy and those whose tumors are not responding, allowing for targeted radiation doses.
Researchers developed a functional diffusion map using MRI scans to track water diffusion in the brain, finding that changes predicted tumor response 10 weeks before traditional techniques. This method could spare patients from ineffective treatment and allow doctors to switch to more effective therapies.
A study analyzing 36 white matter plaques in 20 MS patients showed diffusion tensor MRI to be 45% more sensitive than T2-weighted imaging in measuring diseased white matter. This could lead to earlier detection of abnormalities and improved assessment of therapy effectiveness.
Researchers found that smaller bubbles in champagne release more flavor and aroma molecules, creating a better-tasting wine. The study suggests that dissolved salts, carbohydrates, and minerals play a major role in bubble formation.
The Virginia Tech program aims to develop improved wildlife management strategies for chimpanzee populations in east Africa. Researchers will use a multidisciplinary approach, combining data collection with information sharing and education.
The study identifies changes to rate-determining factors at transition points, shedding new light on the nature of non-linear spreading. Researchers used a model to calculate these changes and found them to be crucial for understanding various phenomena such as 'avalanches' in sand piles.
A new study finds that diffusion-weighted MR imaging can detect stroke with high accuracy, outperforming traditional CT scans. The technique is 100% specific and 90% sensitive in identifying patients who have had a stroke.
Researchers used MR imaging to compare Alzheimer's patients' brains with those of children and adults, finding similar water molecule diffusion. The technique may help detect white matter disease earlier in dementia.
Researchers tracked water molecule movement on palladium surface, discovering clusters of two to six molecules exhibiting high mobility when bound together. The formation of hexamers led to stable honeycomb structures, which spread out and interacted with the substrate's lattice.
A study by Scott Saunders and colleagues suggests that heparan sulfate proteoglycans (HSPGs) help regulate morphogen gradients, influencing cell development and differentiation. HSPGs may also play a role in the formation of complex bone structures and organs.
Researchers developed a new mathematical expression that accurately models p-n junction performance, resolving past misconceptions. The theory reveals unexpected results, including the diffusion capacitance vanishing for long diodes.