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Melatonin is a hormone, released primarily by the pineal gland, that regulates the sleep–wake cycle. 3D ball-and-stick model, white background

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

Close-up shot of a petri dish for checking an antibiotic in the laboratory.

Microcrystalline wax with chemical formula on white laboratory table.

$Model of DNA Base Pair adenine (A) and thymine (T)\n\nFind more molecules in the Lightbox [url=http://www.istockphoto.com/search/lightbox/7500191][i] 'World of Molecules'[/i][/url], or contact me on customized design/rendering of any molecules in 3D (see some examples below). \n\n[img]http://www.drugmodel.com/360/superglassy900.jpg[/img] \n[img]http://www.drugmodel.com/360/capsule900.jpg[/img] \n[img]http://www.drugmodel.com/360/glassy900.jpg[/img] \n[img]http://www.drugmodel.com/360/heart900.jpg[/img] \n[img]http://www.drugmodel.com/360/viruskiller900.jpg[/img] \n[img]http://www.drugmodel.com/360/mesh900.jpg[/img] \n[img]http://www.drugmodel.com/360/cartoon900.jpg[/img] \n[img]http://www.drugmodel.com/360/photo900.jpg[/img] \n[img]http://www.drugmodel.com/360/ovoid900.jpg[/img] \n[img]http://www.drugmodel.com/360/swirlcone900.jpg[/img] \n[img]http://www.drugmodel.com/360/super900.jpg[/img] \n[img]http://www.drugmodel.com/360/glowing900.jpg[/img]$

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

Glutathione (GSH) is an antioxidant in plants, animals, fungi, and some bacteria and archaea. White background

$Streptococcus pneumoniae causes acute bacterial infections. Streptococcus pneumonia can be\ndifferentiated from other alpha-hemolytic streptococci\nbased on its susceptibility to optochin ( the disk is visible on the pic).$

Molecular structure of Acetylcysteine(also known as N-acetylcysteine or NAC). C5H9NO3S. Chemical structure model: Ball and Stick + Balls + Space-Filling. 3D illustration.

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

Nicotinamide adenine dinucleotide or NAD is a coenzyme found in all living cells. It is a dinucleotide, because it consists of two nucleotides joined through their phosphate groups. 3d illustration

The petri dish and liquid is used to work with human cells. Laboratory work in the clinic for artificial fertilization of a female egg.

Prednisone is a glucocorticoid medication mostly used to suppress the immune system and decrease inflammation in conditions such as asthma, COPD, and rheumatologic diseases.

Molecular model of Adenosine triphosphate, or Adenosine-5'-triphosphate (ATP)

Flavin adenine dinucleotide, FAD molecule. Essential redox-active coenzyme involved in energy production and metabolism. Molecular model. 3D rendering. Illustration

$Organic Carnauba Wax in Chemical Watch Glass with molecular structure place next to beaker and \nPlatycerium stemaria fern. Chemical ingredient used in cosmetic industry.$

Rendered Remdesivir molecule in 3D, an experimental drug from Gilead, used to cure the first case of 2019-nCoV in the United States (for a patient at Seattle, Washington). The model showed accurate atom connection and stereochemistry, which was professionally checked. Color symbols - light blue=carbon, red=oxygen, blue=nitrogen, white=hydrogen, green=phosphorus

Prostaglandin D2 or PGD2 is a prostaglandin that binds to the receptor PTGDR as well as CRTH2. 3d illustration

Clotrimazole is an antifungal medication. It is used to treat vaginal yeast infections, oral thrush, diaper rash, tinea versicolor, and types of ringworm including athlete's foot and jock itch.

Acetyl-CoA, acetyl coenzyme A molecule. Key coenzyme in fatty acid biosynthesis, Krebs cycle, citric acid cycle. Molecular model. 3D rendering. Illustration

Chloroquini phosphas, chloroquine medicine substance. Drug introduced as treatment for coronavirus (SARS-CoV-2). Active in COVID-19 supportive therapy. Chemical formula written next to white pills.

Free Images: "bestof:NGPBenzylExample.gif en Non-neighbouring group participation example for chemical glycosylation reactions Own Pktrisacch 2009-04-13 Check categories 2009 June"

Sunset seen from Arctic View in Finmark - Norway.jpg

Standing Paddleboarders and Rowers in Upper Newport Bay (Newport Beach, California).jpg

Chernabura island Shumagin island group.jpg

People in small discussion group meeting.jpg

Group of people enjoying a canoe tour.jpg

Group of girl scouts enjoys birdwatching.jpg

Happy group of children playing race.jpg

Group of people look through binoculars.jpg

People working in small group in office.jpg

Chiswell island group gulf of Alaska.jpg

Group of children watching as snow falls.jpg

Group of teens practice their archery skills.jpg

This is an example of a logging method known as clear cuttin.jpg

Man shows a group of teens a strip of wood.jpg

Group of blow flies congregating on a sign post.jpg

Group of adults and children enjoy recreational fishing.jpg

Older person shows how a watershed works to a group of school children.jpg

People seated at table participating in group discussion during meeting.jpg

Group of walrus animals crammed side by side.jpg

Group of environmental education science teachers take the tour by canoe on lake.jpg

Rathong glacier from Dzongri La (pass) 1.jpg

High Level Bridge Edmonton Alberta Canada 01 A.jpg

Gfp-iowa-bellevue-state-park-steps-on-the-hiking-trail.jpg

Gfp-florida-biscayne-national-park-island-from-the-shore.jpg

Gfp-canada-ontario-scenery-at-thousand-islands-bridge.jpg