Encyclopedia
Monkeypox lesions on a penis. Permission was given to use the photograph for education.
Wikimedia Commons, Graham Beards
01 Mar 2024
When caffeine crystals are magnified 900x under a microscope, they exhibit a striking, needle-like structure with sharp, elongated edges. The crystals appear as slender, interwoven shards or rods that often form intricate patterns, resembling a crystalline forest or a delicate mesh. Depending on the lighting, the crystals can appear transparent or display a shimmering, reflective quality. The geometric precision of the crystals reflects the orderly arrangement of caffeine molecules within the solid state. These microscopic details highlight the purity and characteristic morphology of caffeine, providing insight into its chemical structure and crystallization properties.
09 Aug 2024
Influenza A virus (IAV) is a negative-stranded RNA virus belonging to the Orthomyxoviridae family. The IAV genome is divided into eight segments that encode 11 viral proteins in total (HA, NA, M1, M2, NP, NS1, NS2, PA, PB1, PB2, and PB1-F2). The viral envelope of IAV contains the transmembrane proteins HA, NA, and M2 [1].
Wikimedia Commons, Hi Eun Jung and Heung Kyu Lee
18 Feb 2024
Learn about heart disease, the leading cause of death worldwide. Our infographic provides an overview of risk factors, symptoms, and medication tips to help you stay informed and heart-healthy.
24 Jul 2024
Micrograph of the Marburg virus.
Wikimedia Commons, The University of Texas Medical Branch at Galveston
08 Apr 2024
The wonderful cross-section of carpet fibers, especially the beautiful heart-shaped.
03 Sep 2023
This figure graphically represents the antibiotic Era timeline, focusing on classic strain improvement (CSI) programs for high-yield (HY) antibiotic manufacturers [1].
19 Dec 2023
Porcupines are unique and fascinating creatures with a range of adaptations that help them survive in various environments. Their iconic quills and solitary nature make them one of the most interesting rodents in the animal kingdom.
24 Jul 2024
Highly magnified filaments with heterocysts in an artificial pond at the Field Centre.
Malcolm Storey, BioImages, the virtual fieldguide, UK
05 Aug 2024
Rotavirus, a type of reovirus, is the major worldwide cause of severe childhood diarrhea.
Wikimedia Commons, National Institutes of Health
24 Jan 2024
Rotavirus, a type of reovirus, is the major worldwide cause of severe childhood diarrhea.
Wikimedia Commons, NIAID
25 Jan 2024
Colorized transmission electron micrograph of negatively stained SW31 (swine strain) influenza virus particles.
NIAID, Wikimedia Commons
24 Jan 2024
Ginkgo is native to China. In the picture, the leaves of ginkgo trees turn yellow in autumn.
31 Aug 2023
Schemes of activated air electrodes, used in electrochemical devices: (a) conventional electrode (electronic conductor with localization of the triple-phase boundary (TPB) at the electrode/electrolyte interface); (b) nanosized electrode; (c) composite electrode; (d) nanocomposite electrode; (e) electrode with extanded TPB (mixed ionic-electronic conductor (MIEC)); (f) intermediate active layer (g) infiltrated electrode; (h) nanoparticle exfoliatied electrode [1] .
31 Aug 2023
This is a manual way for analysis the oxydes after boiling at 1000°C.
25 May 2023
It is the only large plant in the palm tree cocos, producing the fruit of the coconut tree.
31 Aug 2023
Oxidative stress is a complex physiological condition characterized by an imbalance between the production of reactive oxygen species (ROS) and the body's ability to detoxify them or repair the resulting damage. This imbalance can have far-reaching consequences on various organ systems, including the liver, pancreas, cardiovascular system, and joints.
04 Sep 2023
An electron micrograph of the Hepatitis A virus (HAV), an RNA virus that can survive up to a month at room temperature. This virus enters an organism by ingestion of water and food contaminated by human feces, and reaches the liver through the bloodstream. HAV infection is endemic in third world countries, and is prevalent in the Far East.
Wikimedia Commons, Centers for Disease Control and Prevention, Betty Partin
24 Jan 2024
These nocturnal explorers are not just cute and curious—they're highly intelligent problem-solvers with a rich history and fascinating behaviors. Whether they're scaling trees, "washing" their food, or navigating urban jungles, raccoons captivate us with their adaptability and charm.
24 Jul 2024
Genomic organization and expression, and key domains of four nidoviruses. The coding regions are partitioned into ORF1a (yellow), ORF1b (violet) and the 3′ORFs (blue), which also differ in expression mechanism as indicated on top. Black squares, ribosomal frameshifting sites. Within ORFs (white rectangles), colored patterns highlight domains identified in: all nidoviruses [TM2, TM3, 3CLpro, RdRp, and Zn-cluster binding domain fused with HEL1 (ZmHEL1) [114] - light and dark blue], large nidoviruses (ExoN, OMT - orange), certain clades (NMT, NendoU - red; ronivirus-specific domain (RsD) - light green; arterivirus-specific domain (AsD) - dark green). Genomic organizations are shown for Beluga whale coronavirus SW1 (corona), gill-associated virus (roni), Nam Dinh virus (mesoni), and porcine respiratory and reproductive syndrome virus North American type (arteri).
Chris Lauber, Jelle J. Goeman, Maria del Carmen Parquet, Phan Thi Nga, Eric J. Snijder, Kouichi Morita, and Alexander E. Gorbalenya
24 Jan 2024
