
Lidský nos dokáže rozlišit až bilion vůní, přičemž nejcitlivější je na geosmin – specifickou a osvěžující vůni deště a mokré hlíny.
Geosmin je organická sloučenina produkovaná půdními bakteriemi. Člověk ho zachytí v extrémně nízké koncentraci pouhých 5 ppt (částic na bilion), což evolučně pomáhalo vyhledávat vodu. // Při výuce používáme transdisciplinární STEAM přístup
Novinky ze světa vědy
Sledujte s námi, jak moderní věda překonává fantazii a mění realitu.
Bioinženýrství
Science Daily: Bioengineering | 2026-11-06
Scientists discover a plastic-eating “Pac-Man” enzyme with a surprising secret
Scientists have discovered a remarkable “Pac-Man enzyme” that helps bacteria devour certain types of plastic and may offer new hope in the fight against plastic pollution. Researchers found that several biodegradable plastics completely broke down in soil within about a year, while conventional plastic remained largely unchanged.| More info
Scientists discover why a 100-year-old mushroom disease won't go away
Scientists have uncovered a surprising secret behind a mushroom disease that has frustrated growers for more than a century: It involves more than 17 species of harmful bacteria, not just one. The discovery could explain why treatments have struggled to stop the disease and open the door to more effective, eco-friendly solutions.| More info
The “glue” holding your cells together has a surprising second job
Scientists have discovered that E-cadherin, a protein best known as the “glue” holding cells and tissues together, has a surprising second job: helping epithelial cells swallow nearby dead cells. Using live zebrafish and mouse embryos, researchers found that cells can dramatically reshape their lower surfaces to engulf cellular debris while keeping their upper surfaces stable, allowing protective barriers to remain sealed.| More info
Scientists find evidence for two origins of life on Earth
Scientists probing life’s deepest origins have uncovered evidence that the first free-living cells may have emerged not once, but twice. The findings suggest a striking possibility: life may share one ancient genetic code, yet have undergone two separate transitions into free-living existence.| More info
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
Chemie
Chemistryworld.com | 2026-11-06
Dozens of unknown MXenes found buried in materials databases
Discovery led to simpler, faster synthesis of these 2D inorganic materials and synthesis of novel MXenes with unusual properties such as magnetism and semiconductivity| More info
Click-style reaction builds imine bonds in water
Zinc complex helps subvert bond’s low hydrolytic stability by pre-organising the starting materials and stabilising the product| More info
Baker lab tackles tough challenge of designing new proteases
Designer enzymes found to be able to slice up proteins implicated in Alzheimer’s and could have other medical uses| More info
Structural determination skipped altogether as algorithm links NMR spectra to chemical reactivity
Approach holds promise for determination of molecular properties by making use of large datasets| More info
Nanotechnologie
Nanotechnology research news from Nanowerk | 2026-11-06
38 science gifts that surprise, from glowing plankton to meteorites
Nanowerk's expanded gift guide features 38 unusual science gifts, from glowing plankton and ferrofluid to real meteorites and scientific curiosities.| More info
Atom-scale model reveals key chemistry behind silicon carbide crystal growth
Simulations reveal how temperature changes the vapor chemistry of silicon carbide, offering a way to optimize crystal growth for power electronics while reducing costly trial-and-error experiments.| More info
AI-assisted design could enable larger, more capable optical metasurfaces
A new review explores how artificial intelligence, advanced simulations, and inverse design could enable larger optical metasurfaces for next-generation lenses, holography, and imaging systems.| More info
Nanomaterial-based flexible films achieve over 100 dB electromagnetic shielding
Flexible films combining conductive nanomaterials achieve electromagnetic shielding above 100 decibels, demonstrating a scalable approach to protecting sensitive electronics from electromagnetic interference.| More info
Physicists create first tunable three-component Hubbard system
A quantum gas microscope reveals Mott insulating behavior and competing magnetic correlations in the first three-component Hubbard system with tunable interactions, advancing quantum simulations of complex materials.| More info
Dnešek v historii
7. 11. 1888
Narodil se Čandrasekhara Venkata Raman, objevitel Ramanova jevu, držitel Nobelovy ceny za fyziku z roku 1930.
Ramanův rozptyl světla slouží v Ramanově spektroskopii jako nedestruktivní metoda k chemické identifikaci molekulárních struktur.