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Symbolic illustration of infectious viruses under the microscope, for example influenza viruses, smallpox, measles or similar. Medical research and investigation of diseases and healthcare concept.

In vitro bacterial culture

The plant roots under the microscope

Photomicrograph of Paramecium caudatum. Consists of only one cell. Live specimen. Wet mount, 40X objective, transmitted brightfield illumination.

The nematode Steinernema feltiae under the microscope, the species used as a biopesticide to infect fungus gnats in agriculture and gardening.

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Aspergillus fumigatus is one of the most common Aspergillus species to cause disease in individuals with an immunodeficiency. This pathogen primarily causes invasive infection in the lung.

A colony of a common fungus seen at high magnification on white background

In vitro bacterial culture

False color image of diatom under the microscope

plant Zea Stem C.S. under light mircoscope with white background

Several clusters of human Human Embryonic Kidney 293 cells in culture. These cells are a standard cell line used in biotechnology applications, for example to produce proteins. This view is as it appears through an inverted biological phase contrast microscope with 200x magnification.

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Sea life Nudibranch eggs underwater

Photomicrograph of one celled amoeba. Live specimen. Wet mount, 40X objective, transmitted brightfield illumination.

Microscopic photo of a thin section of calcareous tufa of Holocene age.

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Close up of a Petri dish with blue specimens in it

Microscopic image showing oxalate crystals from urine sediment, most common cause of kidney stones

Squash preparation of stained onion root tip cells showing various stages of mitosis. Differential interference contrast optics on a Leica microscope, Image taken with the X40 objective lens. Depth of focus is extremely shallow (just a few microns). Differential interference contrast results in an optical slice horizontally through the specimen providing maximum possible resolution at this magnification and good contrast. Chromatic abberation is inevitable in light microscopy, but has been kept to a minimum in this image.

Abstract micrograph with polarization of a bract from a Protea flower, showing the midrib vascular tissue (orange), like magma in a leaf, at 40x.

In vitro bacterial culture

Algae, a unicellular organism, diatoms

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Petri dish at lab

Retina of diabetic - diabetic retinophaty

3D rendering of microscopic particles and bubbles

Free Images: "bestof:Scintillating scotoma.gif scintillating scotoma experienced by the author in June 2011 It is to be looked on at the center of the image The aura was shaped like"

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US_Navy_110603-N-HW158-025_Rear_Adm._Mathias_W._Winter_and_Culinary_Specialist_2nd_Class_Richard_Coggins_bow_their_heads_for_a_moment_of_silence_du.jpg

US_Navy_110606-N-AD372-109_Master_Chief_Petty_Officer_of_the_Navy_(MCPON)_Rick_D._West_inspects_students_attending_the_Navy_Medicine_Training_Cente.jpg

US_Navy_110621-N-HW977-079_Capt._Jay_Kadowaki,_right,_signs_a_Memorandum_of_Understanding_with_U.S._Coast_Guard_establishing_first-ever_partnership.jpg

US_Navy_110623-N-RM525-068_Jorge_Sanchez_akes_a_look_around_the_flight_deck_during_a_tour_aboard_USNS_Comfort_(T-AH_20).jpg

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