Lifeboat Foundation: Safeguarding Humanity
Toggle light / dark theme

Blog – Page 2

Get the latest international news and world events from around the world.

Log in for authorized contributors

Amorphous passivation strategy creates efficient, durable and flexible perovskite solar cells

Solar cells, devices that convert sunlight into electricity, are helping to reduce greenhouse gas emissions worldwide, promoting a shift toward renewable energy sources. Most solar cells used today are based on silicon, yet researchers have recently been exploring the potential of other photovoltaic materials, particularly perovskites.

Perovskites are a class of photovoltaic materials with strong light absorption. In practical devices, perovskite thin films are typically polycrystalline, meaning they consist of many small crystalline grains. As perovskites absorb sunlight so efficiently, a film thinner than ~1 μm can capture most of the incident solar radiation, whereas conventional crystalline silicon usually requires hundreds of micrometers of active material.

This combination of strong absorption and ultrathin active layers makes perovskite thin-film solar cells particularly well suited for lightweight, flexible, high-efficiency photovoltaic devices. Despite these many advantages, perovskites still face inherent challenges, such as achieving true mechanical flexibility, operational stability, and maintaining high efficiency at large areas simultaneously.

First carbon-enhanced metal-poor stars discovered in Milky Way’s companion

Using the Baryons Oscillation Spectroscopic Survey (BOSS) spectrograph, astronomers have discovered five new carbon-enhanced metal-poor stars in the Large Magellanic Cloud (LMC). This is the first time such stars have been identified in this galaxy. The discovery was reported in a paper published January 15 on the arXiv pre-print server.

Metal-poor stars are rare objects, as only a few thousand stars with iron abundances [Fe/H] below-2.0 have been discovered to date. Expanding the still-short list of metal-poor stars is of high importance for astronomers, as such objects have the potential to improve our knowledge of the chemical evolution of the universe.

Observations show that a significant fraction of these stars exhibit a large overabundance of carbon; therefore, they are known as carbon-enhanced metal-poor (CEMP) stars.

Transcranial magnetic stimulation can target a deep brain region without surgery or medication

Neuroscientists at University of Iowa Health Care have demonstrated for the first time that noninvasive brain stimulation can alter the activity of a critical deep brain region involved in emotion and memory. Moreover, the study shows that personalizing the stimulation site using a patient’s unique brain connectivity pathway can increase the neuromodulation effect.

The study, published recently in Nature Communications, used innovative, concurrent brain stimulation and recording techniques in people to provide direct human evidence that noninvasive transcranial magnetic stimulation (TMS) can reliably engage and modulate activity in the hippocampus.

The hippocampus is a deep brain region that plays a critical role in multiple brain functions, such as memory and emotion. Problems with hippocampal function have been implicated in several neurological and neuropsychiatric conditions, including Alzheimer’s disease, depression, anxiety, and post-traumatic stress disorder (PTSD).

Oatk: a de novo assembly tool for complex plant organelle genomes

Plant organelle genomes, particularly large mitochondrial genomes with complex repeats, present significant challenges for assembly. The advent of long-read sequencing enables the assembly of complete genomes, but problems of resolving alternative structures remain. Here we introduce a novel tool that employs a syncmer-based assembler for rapid assembly graph construction, integrates a profile-HMM database for robust organelle identification, and leverages a new search method to find the best supported path through the assembly graph. We describe high-quality organelle assemblies for 195 plant species, demonstrating improvements over other methods, and providing multiple insights into structural complexity, heteroplasmy, and DNA exchange between organelles.

Association of White Matter Hyperintensities, Regional Brain Glucose Metabolism, and Cognitive Impairment in Aβ-Negative Patients

This study examined whether periventricular white matter hyperintensities relate to region-specific cortical hypometabolism and metabolism mediates domain-specific cognition in Aβ-negative individuals.

Letters to the Editor.

The Letters section represents an opportunity for ongoing author debate and post-publication peer review. View our submission guidelines for Letters to the Editor before submitting your comment.

View the Letters for this article.

Expert in Anti-Aging Dr. Ronald Klatz Discusses Chronic Disease — Redefining Medicine

Today’s episode on Redefining Medicine features Ronald Klatz, MD, DO. As Founder and President of the American Academy of Anti-Aging Medicine, and leading authority in the field of anti-aging, Dr. Klatz has helped pioneer the exploration of new therapies and treatments for the prevention of chronic disease, and other disorders associated with aging. Dr. Klatz has also been instrumental in founding the National Academy of Sports Medicine, and continues to provide oversight for continuing medical education programs, activities, and publications. #antiaging #regenerativemedicine #wellness #sportsmedicine #Innovation #wellness #functionalmedicine

Cytomegalovirus Drives the Development of Cytotoxic CD4+ T Cells in Patients With Multiple Sclerosis

Background and ObjectivesChronic immune activation is a hallmark of latent viral infections and autoimmune disorders, profoundly shaping immune cell phenotypes, including CD4+ cytotoxic T lymphocytes (CD4 CTL). The mechanisms underlying CD4 CTL…

Ghostly particles: Dark radiation may have masqueraded as neutrinos

New research suggests that neutrinos in the early universe may have transformed into a previously unknown form of radiation. A study from Washington University in St. Louis offers a new way to explain certain puzzling observations about how the universe evolved.

Bhupal Dev and his colleagues report the results in a paper published in Physical Review Letters. Dev is an associate professor of physics in Arts & Sciences and a fellow of the McDonnell Center for the Space Sciences, both at WashU.

Neutrinos are among the most abundant particles in the universe. Often described as ghostlike because they interact so weakly with matter, neutrinos play an important role in shaping how cosmic structures form and evolve.

Reprogramming ‘gatekeeper’ immune cell may boost cancer immunotherapy

St. Jude Children’s Research Hospital scientists have discovered how tumors disable immune “gatekeeper” cells that alert the rest of the immune system to the presence of cancer—and how restoring their energy production can improve immunotherapy. Dendritic cells activate the cytotoxic immune cells that destroy cancer. The researchers found that tumors reduce dendritic cell function by decreasing their mitochondrial fitness, thus preventing formation of the anticancer immune response.

The results, published in Science, also show that boosting mitochondrial function in dendritic cells enhances antitumor immune activity and strengthens the efficacy of existing immunotherapies.

Dendritic cells alert and activate tumor-killing immune cells as a critical part of anticancer immune response. However, within the nutrient-sparse tumor microenvironment (the complex mixture of chemicals, cells and other factors near cancer cells), dendritic cells progressively lose their energy-producing mitochondrial activity. That loss drives dendritic cell dysfunction and weakens the body’s immune defenses against cancer.

/* */