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Archive for the ‘chemistry’ category: Page 16

Sep 3, 2024

Chemists find new pharmaceutically active substances from billions of newly combined molecules

Posted by in categories: biotech/medical, chemistry

Nowadays, there’s lots of buzz about spectacular new medical treatments, such as personalized cancer therapy with modified immune cells or antibodies. Such treatments, however, are very complex and expensive and so find only limited application. Most medical therapies are still based on small chemical compounds that can be produced in large quantities and thus at low cost.

Sep 3, 2024

Quantum-dot-enabled infrared hyperspectral imaging with single-pixel detection

Posted by in categories: chemistry, food, information science, military, quantum physics

Widely utilized across various industries such as chemistry, agriculture, and military, this technology relies on strategies like dispersive optics and narrow-band light filters.

However, limitations exist in these approaches. Additionally, the fabrication of large-scale InGaAs detector arrays poses challenges, necessitating the development of new experimental methods and algorithms to advance infrared hyperspectral imaging technology in terms of miniaturization and cost-effectiveness.

In a paper published in Light Science & Applications, a team led by Professor Baoqing Sun and Yuan Gao from Shandong University introduce a novel method for encoding near-infrared spectral and spatial data.

Sep 2, 2024

Near‐Infrared Light Activated Formulation for the Spatially Controlled Release of CRISPR‐Cas9 Ribonucleoprotein for Brain Gene Editing

Posted by in categories: bioengineering, biotech/medical, chemistry, nanotechnology, neuroscience

A nanoparticle formulation, using oligonucleotide chemistry, able to release a gene editing system with single cell resolution after near infrared laser activation. The full potential of the formulation was demonstrated in the brain after intracerebral and intranasal administrations. The spot of the laser defined the region of gene editing.

Sep 2, 2024

On the way to optical logic gates: Study demonstrates the basics for purely optical processing of information

Posted by in categories: chemistry, physics

In a collaboration between scientists from Physics and Chemistry at the University of Bayreuth and Physical Chemistry at the University of Melbourne, it has now been possible to realize optically switchable photonic units that enable precise addressing of individual units. This will make it possible to reliably store and read binary information optically.

Sep 1, 2024

Scientists make breakthrough discovery with the power to permanently change plastic pollution: ‘Transforming … pollutants into valuable, reusable chemicals’

Posted by in categories: chemistry, computing, sustainability

Scientists at the University of Texas used a breakthrough laser recycling technique to turn plastic into computer components.

Sep 1, 2024

Mitochondria Dump DNA in The Brain, Potentially Cutting Years Off Our Lives

Posted by in categories: biotech/medical, chemistry, neuroscience, nuclear energy

Scraps of DNA discarded by our neurons’ power units are being absorbed into our nuclear genome far more frequently than assumed, potentially putting our brains at greater risk of developing life-threatening conditions.

An investigation by a team of researchers led by Columbia University in the US has found individuals with higher numbers of nuclear mitochondrial insertions – or NUMTs (pronounced new-mites) – in their brain cells are more likely to die earlier than those with fewer DNA transfers.

Continue reading “Mitochondria Dump DNA in The Brain, Potentially Cutting Years Off Our Lives” »

Aug 31, 2024

Diagnosing traumatic brain injury with a handheld device

Posted by in categories: chemistry, nanotechnology, neuroscience

The retina and optic nerve share most of the brain’s biochemical properties – this way, they provide a ‘window’ into the biochemistry of the brain.

To address this lack of technological means for the early detection of TBI, Pola Goldberg Oppenheimer, a Professor in Micro-Engineering and Bio-Nanotechnology at the University of Birmingham, UK, has developed a groundbreaking laser-based, eye-safe device (EyeD) technology. This technology can detect molecular changes that reflect brain damage by scanning the back of the eye with a handheld device.

Aug 30, 2024

Electrochemical meta-C–H sulfonylation of pyridines with nucleophilic sulfinates

Posted by in category: chemistry

Direct meta-selective C–H functionalization of pyridines is of paramount importance, but such reactions remain limited and highly challenging. Here, the authors report an electrochemical methodology in which nucleophilic sulfinates allow meta-sulfonylation of pyridines through a redox-neutral dearomatization-rearomatization strategy.

Aug 30, 2024

Newly-discovered Star could provide New Insights into the Evolution of Stars

Posted by in categories: chemistry, evolution, space

A new study published in The Astrophysical Journal, led by Assistant Professor of Astronomy Rana Ezzeddine and UF alumnus Jeremy Kowkabany, with collaborators, reports the discovery of a star that challenges astronomers’ understanding of star evolution and formation of chemical elements, and could suggest a new stage in their growth cycle.

It is widely accepted that as stars burn, they lose lighter elements like lithium in exchange for heavier elements like carbon and oxygen, but an analysis of this new star revealed that not only was its lithium content high for its age, but was higher than the normal level for any star at any age.

This star, named J0524-0336 based on its coordinates in space, was discovered recently by Ezzeddine as part of a different study that used surveying to look for older stars in the Milky Way. It is an evolved star, meaning that it is in the later stages of its “life” and is beginning to grow unstable. That also means that it is much larger and brighter than most other stars of its type, estimated to be about 30 times the size of the sun.

Aug 30, 2024

Quantum Alchemy: Scientists Fuse Light and Sugar To Create New States of Matter

Posted by in categories: chemistry, quantum physics

Researchers have developed a technique to trap light within an organic material, forming a hybrid quantum state that gives rise to novel physical and chemical properties.

An international team of researchers led by the University of Ottawa has gone back to the kitchen cupboard to create a recipe that combines organic material and light to create quantum states.

Professor Jean-Michel Ménard, leader of the Ultrafast Terahertz Spectroscopy group at the Faculty of Science, coordinated with Dr. Claudiu Genes at the Max Planck Institute for the Science of Light (Germany), and with Iridian Spectral Technologies (Ottawa) to design a device which can efficiently modify properties of materials using the quantum superposition with light.

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