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A ball and stick model of Dopamine. It is a neurotransmitter affecting behaviour, sleep, learning, perception of pain, mood and motivation.

Science background with molecule or atom

Folic acid, folate molecule. It is known as vitamin B9. Molecular model. 3D rendering. Illustration

Chemical formula of Cortisol

Proliferating cell nuclear antigen (PCNA) is a DNA clamp that acts as a processivity factor for DNA polymerase δ in eukaryotic cells and is essential for replication. PCNA is a homotrimer and achieves its processivity by encircling the DNA, where it acts as a scaffold to recruit proteins involved in DNA replication, DNA repair, chromatin remodeling and epigenetics. 3D cartoon and Gaussian surface models, chain instance color scheme, based on PDB 3wgw, white background.

DNA A-T Pair

Copper(II) sulfate with molecular structure. Chemical ingredient used in medical and public health issues.

Two road signs in Portugal, one for Lisbon and one for Portugal, both via I.C. 23.

3d rendering of benzene molecules conjugated gold (Au) nanoparticles (NPs) on the black background

Directional Sign on Santorini in South Aegean Islands, Greece

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

3d Rendering Molecular Structure,Ozone,Hydrogen and oxygen

Chemical formula of Progesterone

Triacetin, glycerin triacetate molecule. It is triglyceride, triester of glycerol, food additive with E number E1518. Molecular model. 3D rendering. 3D illustration

Walking, and cycling route to Canvey Island

3D cartoon and Gaussian surface models, PDB 1ni4, white background.

Road direction sign against Berlin communications tower

Squalane is a hydrocarbon derived by hydrogenation of squalene. 3d illustration

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.

Built-up area signs of Nieuwerkerk at Ver Hitland hamlet in the Netherlands

Inside protein molecule

Hyaluronan, hyaluronic acid, HA, hyaluronate molecule, short fragment. Molecular model. 3D rendering. Illustration

Riverside houses on sunny days

3D cartoon and Gaussian surface models, PDB 3hg3, white background

Road sign on Austrian highway.

Yohimbine(quebrachine), is an indole alkaloid. C21H26N2O3. Chemical structure model: Ball and Stick + Balls + Space-Filling. 3D illustration.

The Eiffel Tower is a popular sight for tourists in Paris

Misoprostol is a medication used to start labor, cause an abortion, prevent and treat stomach ulcers, and treat postpartum bleeding due to poor contraction of the uterus. 3d illustration

Water pollution, truck tires on river bank

Free Images: "bestof:Stilbene cis structure.svg InvalidSVG 21 Structure of cis-stilbene stilbene-cis Z stilbene Author Su-no-G Source Own work Date 10 Mar 2007 Made with ChemDraw"

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