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Calcidiol molecule, also called calcifediol, major circulating metabolite of vitamin D3 produced in liver, 3D illustration

Close up view of a scientist's hand holding a food sample with tweezers

Science background with molecule or atom

Rhododendron

Green plant leaf and cosmetic gel drops in petri dishes isolated on white background. Natural eco beauty, herbal cosmetic laboratory research and vegan organic skin care concept.

Photomicrograph of filamentous blue-green algae, Oscillatoria species. Each band along the stand is one cell. This filament is very short probably having recently parted from a longer one. Filaments are typically many times longer. This algae is mobile, it moves and twists through the water. San Francisco Bay, California, USA. Live specimen. Wet mount, 40X objective, transmitted brightfield illumination. Note - motion blur of live specimen, very shallow depth of field, chromatic aberration and uneven focus are inherent in light microscopy.

Antibiotic resistance testing. Selective focus show the inhibition zone of Ofloxacin (OXF) antibiotic on microbial colony.

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

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

Liver Fluke Section under light microscope with white background

Molecular model of insulin hormone, 3D illustration. It is produced by pancreas and takes part in glucose and lipid metabolism

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

Dihydrotestosterone or androstanolone or stanolone is an endogenous androgen sex steroid and hormone. 3D illustration on white

3D rendered microscopic molecular model

Organic white cosmetics cream, foam and essential oil in petri dish

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

Close-up detail of multiple plates of petri dishes containing cultures of Methicillin-Resistant Staphylococcus Aureus (MRSA). Healthcare and infectious diseases concept.

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

All drugs are resistance in sensitivity test.

Rotten food

Freshwater aquatic zooplankton and algae under microscope view

Photomicrograph of two rotifers. Rapidly rotating cilia at top of heads, internal organs visible. Live specimen. Wet mount, 10X objective, transmitted brightfield illumination.

centropyxis aculeata (amoeboid organism) under the microscope - optical microscope x400 magnification

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

Chlorella is a genus of single-cell green algae belonging to the division Chlorophyta.

Abstract Crystal background marble shot, nature pattern.

Only one drug Nitrofurantoin is sensitive in sensitivity test.

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.

Olivine, closeup of the gemstone cut out on a white background

In vitro bacterial culture

Free Images: "bestof:Basebutyllithium.png Basebuty llithium Own Quantockgoblin chemical Persistent carbenes"

Liftoff_of_a_Titan_IVB/Centaur_carrying_the_Cassini_orbiter_and_its_attached_Huygens_probe.jpg

Pauline_Clyburn,_rehabilitation_client_at_Manning,_Clarendon..._(3109745797).jpg

(Portrait_of_Cozy_Cole,_New_York,_N.Y.(?),_ca._Sept._1946)_(LOC)_(4843123519).jpg

(Portrait_of_Walter_Hendl,_Tony_Aless,_Billy_Bauer,_Chubby_Jackson,_Don_Lamond,_Woody_Herman,_and_Flip_Phillips,_Carnegie_Hall(?),_New_York,_N.Y.(?),_ca._Apr._1946)_(LOC)_(4843746780).jpg

Graham_Wallas_(right),_K.B._Smellie_(left),_1925.jpg

Wanzlick's Equilibrium General Formulae V.1.svg

NHC formation is.svg

NHC mesomerie is.svg

NHC is.svg

Schlenk flasks.svg

NHC singulett vs triplett is.svg

Graham condenser.svg

Methylene Angel V.1.svg

Tributyltin hydride.svg

Pyruvic acid.svg

1,3-butadiene.svg

(Cyanomethylene)alkylphosphorane.svg

2 methylnaphthalene.svg

Adamantane acsv.svg

Osaterone skeletal.svg

3 hydroxypicolinic acid.svg

Biochanine A.svg

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