The four types of market structure - Download as a PDF or view online for free
Learn more about macronutrients and micronutrients, the two primary classifications of nutrients found in food and beverages.
Diatoms and architecture
Lau's hedgehog cactus seed collected in Mexico, 1.4 mm long. The rather smooth surface allows easy passage through the gut.
Gallery of contemporary art.
pollen
Allergic diseases such as allergic rhinitis (AR), allergic asthma (AAS), atopic dermatitis (AD), food allergy (FA), and eczema are systemic diseases caused by an impaired immune system. Accompanied by high recurrence rates, the steadily rising incidence rates of these diseases are attracting increasing attention. The pathogenesis of allergic diseases is complex and involves many factors, including maternal-fetal environment, living environment, genetics, epigenetics, and the body’s immune status. The pathogenesis of allergic diseases exhibits a marked heterogeneity, with phenotype and endotype defining visible features and associated molecular mechanisms, respectively. With the rapid development of immunology, molecular biology, and biotechnology, many new biological drugs have been designed for the treatment of allergic diseases, including anti-immunoglobulin E (IgE), anti-interleukin (IL)-5, and anti-thymic stromal lymphopoietin (TSLP)/IL-4, to control symptoms. For doctors and scientists, it is becoming more and more important to understand the influencing factors, pathogenesis, and treatment progress of allergic diseases. This review aimed to assess the epidemiology, pathogenesis, and therapeutic interventions of allergic diseases, including AR, AAS, AD, and FA. We hope to help doctors and scientists understand allergic diseases systematically.
Shape - Water
I bought a potted calla lily plant, so I will probably be posting photos of it over the next several days.
Explore Fernan Federici's 803 photos on Flickr!
Microphotography - hollow stem
View the winning entries from the 2014 Photomicrography Competition
Completed in 2013 in Portland, United States. Images by Lara Swimmer. Steep Slope The Tower House is perched on a small shelf along steep topography downhill from NW Cornell Road. It touches the ground lightly and is...
A Nauplius by Jacek Mysłowski
An ambitious project to create an accurate computer model of the brain has reached an impressive milestone. Scientists in Switzerland working with IBM researchers have shown that their computer simulation of the neocortical column, arguably the most complex part of a mammal’s brain, appears to behave like its biological counterpart. By demonstrating that their simulation…
Self-taught photographer John Hallmén is a master of insect photography, using focus stacking to create detailed insect portraits and images of these creatures in their natural environment. We interview the Swedish photographer about his technique and inspiration.
View the winning entries from the 2009 Photomicrography Competition
