Reference Terms
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Electron microscope
The electron microscope is a type of microscope that uses electrons to create an image of the target. It has much higher magnification or resolving power than a normal light microscope.
Although modern electron microscopes can magnify objects up to two million times, they are still based upon Ruska's prototype and his correlation between wavelength and resolution. The electron microscope is an integral part of many laboratories. Researchers use it to examine biological materials (such as microorganisms and cells), a variety of large molecules, medical biopsy samples, metals and crystalline structures, and the characteristics of various surfaces.
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Health & Medicine News
October 18, 2025
Oct. 18, 2025 — Weight-loss surgery dramatically outperformed GLP-1 medications in improving longevity and reducing heart, kidney, and eye complications for people with obesity and diabetes. Over 10 years, patients lost far more weight and required fewer ...
Oct. 18, 2025 — A long-term Australian study found that calcium supplements do not raise dementia risk in older women, countering previous fears. The research followed more than 1,400 participants for nearly 15 years and revealed no harmful cognitive effects. ...
Oct. 18, 2025 — EMBL researchers created SDR-seq, a next-generation tool that decodes both DNA and RNA from the same cell. It finally opens access to non-coding regions, where most disease-associated genetic variants lie. By revealing how these variants affect gene ...
Oct. 18, 2025 — Semaglutide, tirzepatide, and other GLP-1 drugs appear to slow alcohol absorption and blunt its intoxicating effects, according to new research. The study found participants on these medications felt less drunk despite consuming the same amount of ...
Oct. 17, 2025 — Salk Institute scientists discovered that bile acids in the liver can weaken immune cell function, making immunotherapy less effective against liver cancer. They pinpointed specific bile acids that suppress T cells and found that supplementing with ...
Oct. 16, 2025 — Scientists have found a way to transform hard-to-treat tumors into targets for the immune system. Using two protein stimulators, they activated strong T-cell and B-cell responses and built immune structures inside tumors that improved survival and ...
Oct. 16, 2025 — Long before humans built cities or wrote words, our ancestors may have faced a hidden threat that shaped who we became. Scientists studying ancient teeth found that early humans, great apes, and even Neanderthals were exposed to lead millions of ...
Oct. 16, 2025 — Johns Hopkins scientists uncovered microscopic “nanotube” channels that neurons use to transfer toxic molecules. While this process clears waste, it can also spread harmful proteins like amyloid-beta. Alzheimer’s-model mice showed more ...
Oct. 15, 2025 — Scientists discovered that lean pork builds muscle more effectively post-workout than high-fat pork, even with identical protein levels. Using advanced tracking techniques, they found that fat content blunted the body’s muscle-building response. ...
Oct. 15, 2025 — Korean researchers found that low-dose radiation therapy eased knee pain and improved movement in people with mild to moderate osteoarthritis. The treatment, far weaker than cancer radiation, showed real benefits beyond placebo. With no side effects ...
Oct. 15, 2025 — Scientists discovered that specific nutrients in nematodes' diets activate stress defenses that keep their cells healthier over time. These RNAs prevent toxic protein buildup, promoting longevity and vitality. The worms fed with balanced diets lived ...
Oct. 15, 2025 — A new human liver organoid microarray developed by Cincinnati Children’s and Roche recreates immune-driven liver injury in the lab. Built from patient-derived stem cells and immune cells, it accurately models how genetics influence drug reactions. ...
Latest Headlines
updated 12:56 pm ET
Oct. 18, 2025 — Stanford scientists have solved a long-standing challenge in growing brain organoids by using a simple food additive to keep them from sticking ...
Oct. 16, 2025 — Researchers discovered a new field of ancient tektites in South Australia, revealing a long-forgotten asteroid impact. These 11-million-year-old glass fragments differ chemically and geographically ...
Oct. 14, 2025 — Endurance exercise may train the immune system as much as the muscles. Older adults with decades of running or cycling had immune cells that functioned better and aged more slowly. Their inflammation ...
Oct. 14, 2025 — Researchers have synthesized enhanced vitamin K analogues that outperform natural vitamin K in promoting neuron growth. The new compounds, which combine vitamin K with retinoic acid, activate the ...
Oct. 14, 2025 — Researchers at USC have created the first method to noninvasively measure microscopic blood vessel pulses in the human brain. Using advanced 7T MRI, they found these tiny pulsations grow stronger ...
Oct. 14, 2025 — Scientists at UC Irvine have found a way to potentially reverse age-related vision loss by targeting the ELOVL2 “aging gene” and restoring vital fatty acids in the retina. Their experiments in ...
Oct. 14, 2025 — Groundbreaking Harvard research is exposing hidden energy failures inside brain cells that may drive major psychiatric conditions. By studying reprogrammed neurons, scientists are revealing how ...
Oct. 13, 2025 — Scientists at Mass General Brigham have created HPV-DeepSeek, a blood test that can detect HPV-linked head and neck cancers nearly a decade before diagnosis. By finding viral DNA in the bloodstream, ...
Oct. 13, 2025 — A team at Massachusetts General Hospital uncovered that an immune defense protein, Resistin-like molecule gamma, attacks heart cells after a heart attack—literally punching holes in them. This ...
Oct. 13, 2025 — Finasteride, a common hair-loss drug, has long been tied to depression and suicide, but regulators ignored the warnings. Prof. Mayer Brezis’s review exposes global data showing psychiatric harm and ...