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THC (tetrahydrocannabinol) crystals. Tetrahydrocannabinol, also known as THC, is the main psychoactive drug (plant alkaloid) found in the hemp (marijuana) plant, Cannabis sativa. Its pharmacological actions are the result of its binding to specific cannabinoid receptors located in the brain and throughout the body. Effects include relaxation, euphoria, altered space-time perception, enhancement of visual, auditory, and olfactory senses, disorientation, and appetite stimulation. A number of studies indicate medical benefits for cancer and AIDS patients by increasing appetite and decreasing nausea, blocking the spread of some cancer-causing Herpes simplex viruses. It has been shown to assist some glaucoma patients by reducing pressure within the eye, and is used, in the form of cannabis by a number of multiple sclerosis patients for relieving spasm. Other studies indicate a variety of negative effects associated with constant, long-term use, including memory loss, depression and loss of motivation. Synthetic THC, also known under the substance name dronabinol, is available as a prescription drug (e.g. Marinol) in several countries including the USA, The Netherlands, and Germany.
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• Scientific Image Library – over 4,400 light microscopy and electron microscopy images of Algae, Arachnids, Bacteria, Crystals, Fungi, Insects, Invertebrates, Medical, Miscellaneous, Plants, Protozoa, Vertebrates, and Viruses. Biological, medical and general sciences images are available for licensed, rights-managed, non-exclusive use.
• Contact us if you can't find an image. Our archives contain thousands of black & white micrographs (colorizations available).
• Assignment Photography – Contact us for custom scientific imaging of samples and products. Dennis Kunkel Ph.D has over 35 years of microscopy expertise in biological and medical sciences.
Dennis Kunkel Microscopy, Inc. is a scientific stock photography agency (science stock photography, science stock photographs / pictures) featuring biology, medical and biomedical microscopy photos / pictures taken with light microscopes (LM) and electron microscopes (transmission electron microscope - TEM; scanning electron microscope - SEM). Microscopy photographs (science images, electron microscope images, photomicrographs, microscopy photos, microscope photos, microscopic pictures) are available for use in editorial and commercial formats. Image categories include Algae, Arachnids, Bacteria, Crystals, Fungi, Insects, Invertebrates, Medical, Miscellaneous, Plants, Protozoa, Vertebrates and Viruses.
Copyright © 2013 Dennis Kunkel Microscopy, Inc. and other copyright holders. All rights reserved, protected under U.S. Copyright. No images or graphics on this site may be used without written permission of their respective owners. For licensing, contact Dennis Kunkel (scientific stock photography, science images, science stock photography, electron microscopy images, biomedical microscopy photos, microscopic pictures, microscope photos).