
Rostliny při fotosyntéze dosahují neuvěřitelné 99% efektivity přenosu zachycené energie z fotonů bez jakýchkoliv ztrát.
Dopadající foton využívá jev zvaný kvantová koherence. Energie se v buňce nepohybuje po jedné dráze, ale díky superpozici putuje po všech možných trasách současně, čímž okamžitě najde tu nejrychlejší. // Při výuce používáme transdisciplinární STEAM přístup
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Bioinženýrství
Science Daily: Bioengineering | 2026-07-25
Scientists just found what keeps plant cells from growing out of control
Before seedlings can photosynthesize, they depend on fatty acids—and on peroxisomes to process them. Researchers discovered that the protein PEX11 not only helps these structures divide but also controls their size during early growth. When key genes were altered, peroxisomes grew abnormally large, suggesting internal vesicles normally keep them in balance. Remarkably, a yeast version of the protein fixed the problem, pointing to a deeply conserved mechanism across species.| More info
A donut-shaped protein breaks apart to start bacterial cell division
Researchers have revealed how bacteria precisely control the genes that trigger cell division. The study shows that the MraZ protein, which normally forms a donut-shaped structure, must bend and partially break apart to bind key DNA sequences that activate division genes. Using cryo-electron microscopy, scientists captured this interaction in remarkable detail. The mechanism appears to be widespread across bacteria, offering a new window into how microbes regulate growth.| More info
Light-guided evolution creates proteins that can switch, sense, and compute
Researchers have created a method called optovolution that uses light to guide the evolution of proteins with dynamic behaviors. By engineering yeast cells so their survival depended on proteins switching states at the right time, scientists could rapidly select the best-performing variants. The technique produced new light-sensitive proteins that respond to different colors and improved optogenetic systems. It even evolved a protein that behaves like a tiny logic gate, activating genes only when two signals are present.| More info
The 4x rule: Why some people’s DNA is more unstable than others
A large genetic study shows that many people carry DNA sequences that slowly expand as they get older. Common genetic variants can dramatically alter how fast this expansion happens, sometimes multiplying the pace by four. Researchers also identified specific DNA expansions linked to severe kidney and liver disease. The findings suggest that age-related DNA instability is far more common than previously realized.| More info
Sunflowers may be the future of "vegan meat"
A collaboration between Brazilian and German researchers has led to a sunflower-based meat substitute that’s high in protein and minerals. The new ingredient, made from refined sunflower flour, delivers excellent nutritional value and a mild flavor. Tests showed strong texture and healthy fat content, suggesting great potential for use in the growing plant-based food sector.| More info
Chemie
Chemistryworld.com | 2026-07-25
Chemists reveal just how much angle – and proximity – matters for molecules to react when they collide
Discovery could one day allow chemists to create more efficient reactions that require less energy| More info
Chemical analysis of limpet shells reveals mechanism behind deep-sea migrations
Concentrations of barium, manganese and oxygen isotopes in shell layers provide evidence of where limpets live at different life stages| More info
Photoredox catalyst introduces two nucleophiles across a carbon–carbon bond at once
Reaction also challenges the idea that C–X bonds can only undergo one-site transformations| More info
Chemical treatment slashes emissions of making hydrogen from plastic waste
Process can produce hydrogen from polyethylene and polypropylene more cleanly than from natural gas| More info
Nanotechnologie
Nanotechnology research news from Nanowerk | 2026-07-25
Ultrathin aluminum-air batteries power skin-mounted electronics
A hygroscopic lithium chloride hydrogel absorbs atmospheric moisture while suppressing aluminum corrosion, enabling ultrathin aluminum air batteries that remain stable under deformation and power skin sensors.| More info
Algorithm-designed photonic circuits beyond human intuition
Researchers used an inverse-design algorithm to create silicon nitride photonic components that are 500 times smaller than conventional designs. The research could pave the way for higher-performance quantum photonic circuits and other devices.| More info
When quantum computers freeze: How even minor, yet frequent, disruptions can cause quantum computing to fail
As adiabatic quantum computers scale, environmental disturbances may trigger the quantum Zeno effect, slowing calculations or nearly freezing them.| More info
Zinc oxide defect could enable scalable spin qubits with high-fidelity readout
Quantum simulations identify a zinc oxide defect with bright light emission, long spin coherence and single-shot readout potential for scalable quantum devices.| More info
Quantum dots reveal hidden light waves on metal surfaces
New imaging technique visualizes and measures plasmonic waves in device structures designed for practical uses.| More info
Dnešek v historii
25.07.1931
Narodil se Peter Armbruster, německý jaderný fyzik, spoluobjevitel řady supertěžkých transuranových prvků v GSI Darmstadt.
Podílel se na úspěšné umělé syntéze prvků bohris (107), hassium (108), meitnerium (109), darmstadtium (110), roentgenium (111) a kopernicium (112) pomocí urychlovače těžkých iontů.