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Automotive Engine Cover on White Background
Prostaglandin D2 or PGD2 is a prostaglandin that binds to the receptor PTGDR as well as CRTH2. 3d illustration
Wild carrot or common carrot Daucus carota genus Carrot Daucus of the Umbelliferae family.
A molecular model of the hormone Hydrocortisone or Cortisol.  It has many effects on the human body, but is primarily released from the adrenal gland as a response to stress.  Isolated on white.
In the field a small Spermacoce verticillata bush with flowers
Cylinder on white background
Clover, also called trefoil, are plants of the genus Trifolium, consisting of about 300 species of flowering plants in the legume family Fabaceae originating in Europe.
Zeolite crystals in cavities of Igneous volcanic basalt rock
Sample of biotite Schist, from the shear zone in the Beitbridge Complex in South Africa. Schist is metamorphic rock caused by pressure during medium grade metamorphism.
chinese medicine  semen momordicae, Momordica cochinchinensis on black background
Neohalicholactone is unusual fatty acid metabolites having a cyclopropane ring and a nine-membered lactone. 3d illustration
Automotive Car engine part
Highlight on chemical element Barium in periodic table of elements. 3D rendering
White Elder Flower
closeup of sample of natural mineral from geological collection - raw crystalline Galena (Galenite, lead glance) rock isolated on white background
US currency,  copper Indian Head penny from 1862.
Cylinder block close up
sunstone mineral stone sample macro photography
Tryptophan or Trp is an alpha-amino acid that is used in the biosynthesis of proteins, 3d illustration
Vehicle Part on White Background
The man is repairing the carburetor of the car.
A molecular model of Bisphenol A or BPA.  It is a common building block in the production of many epoxy resins and plastics including polycarbonate plastic. As such it is present in a huge range of food packaging and household products. There are now concerns about its health effects, particularly its effect on children, infants and fetuses.   Isolated on white.
cylinder head, of an internal combustion engine, petrol engine cylinder head being repaired on white isolated background
Sambucus nigra. Common names include elder, elderberry, black elder, European elder, European elderberry and European black elderberry.
Gypsum rose with a crystal on a cut out background, Crystals resembling the shape of a rose
Green quartz crystal isolated on the white background.
Mefloquine is a medication used to prevent or treat malaria.When used for prevention it is taken once a week and should be started one or two weeks before potential exposure. 3d illustration
CNC machine Cutting Tools on White Background
Background from emerald green water saturated with radon. Flooded granite quarry, tree leaves.
Hawthorn
Free Images: "bestof:Alkylboranes oxidation mechanism.PNG Alkylboranes oxidation mechanism Source Myself using ISIS/Draw Date 24 April 2007 2007-04-24 own assumed Apcpca Organic"
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