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Mikroskopická bakterie Cupriavidus metallidurans dokáže žít ve vysoce toxickém prostředí a vylučovat nugety čistého zlata.
Proces se nazývá biomineralizace. Bakterie absorbuje z půdy toxické tekuté sloučeniny těžkých kovů a pomocí enzymů je uvnitř těla redukuje na netoxické pevné nanočástice 24karátového zlata. // Při výuce používáme transdisciplinární STEAM přístup

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Bioinženýrství

Science Daily: Bioengineering | 2026-07-13
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 | 2026-07-13
First sugar detected in the interstellar medium
Erythrulose – a chiral four-carbon sugar – may have formed from simpler molecules on interstellar dust grains, computational studies suggest| More info

Rethinking ‘dynamic catalysis’ optimisation: chemists may have been doing it the wrong way for years
Researchers should focus on reaction progression rather than time for promising catalytic system| More info

Elusive crystal structure of borylnitrenes finally captured
In situ crystallography reveals a snapshot of a boron-bound nitrene| More info

One-electron bonds may be more common than chemists thought
Researchers identify one-electron behaviour in systems traditionally described as covalent, ionic and dative bonding| More info

‘A materials breakthrough’: membranes to separate crude oil could slash energy costs
Separating crude oil into useful fractions take 1% of the world’s energy. These researchers have a plan to tackle this| More info

Nanotechnologie

Nanotechnology research news from Nanowerk | 2026-07-13
World's first superconducting quantum heat engine offers path to larger quantum computers
A newly-developed superconducting quantum heat engine not only advances our understanding of thermodynamics but also enables technologies needed for high-qubit quantum computers.| More info

Researchers watch chemistry unfold atom by atom
Study suggests a new way to follow electronic and vibrational dynamics in real time.| More info

Nanoporous MOF harvests drinking water from dry air and triples cooling performance
A nanoporous MOF composite harvests drinking water from dry air and delivers up to three times the cooling performance of conventional silica gel.| More info

Batteries lose lithium in the current collector
Atom probe tomography shows lithium accumulates in copper current collectors during cycling, revealing a hidden cause of capacity loss and battery degradation.| More info

Computer-guided electricity rapidly transforms flat nanofilms into 3D shapes on demand
With this technology, computers can manipulate nanostructures within 10 seconds, offering potential applications in cell movement and nanorobot power systems.| More info

Dnešek v historii

14.07.1874

Narodil se André-Louis Debierne, francouzský chemik a objevitel radioaktivního prvku aktinia (1899).

Debierne byl nejbližším spolupracovníkem Marie a Pierre Curieových. Aktinium izoloval ze zbytků jáchymovského smolince, ze kterého Curieovi předtím vyextrahovali polonium a radium.