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

Bacterial multidrug efflux pumps (E-CmeB) expel antibiotics from inside the bacterium (bottom): ciprofloxacin (yellow), chloramphenicol (violet), ampicillin (red).

Stone structures connected by a light wave that changes their color, 3d render.

Diatoms, algae under microscopic view, phytoplankton, fossils, silica, golden yellow algae

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.

Tryptophan or Trp is an alpha-amino acid that is used in the biosynthesis of proteins, 3d illustration

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.

$What micro plastic is made of - Chemical ingredients.\nClose up of microplastic on finger concept of water pollution and global warming$

From left to right: the NMDA and AMPA receptors transport calcium cations into neurons after being activated by the neurotransmitter glutamate and the GABA receptor (right) transport chloride anions after the activation by gamma aminobutyrate. PDB entries: 6wht, 3kg2, 6d6u

$The three-dimensional structure of proteins is represented in a variety of conformations. This image is based on the ribbon structure of a protein. It is suitable for biology notebooks and book covers.\nThis image has not been created by AI.$

Proctological exam and rectal examination concept with a closeup on the hands of a proctologist getting ready for DRE by lubricating his latex gloves with petroleum jelly

Voting in a UK Election for Members of Parliament or Representatives in Local Elections. Coloured Rosettes for the principal UK political parties: Red for Labour, Blue for Conservative, Yellow for Liberal Democrats, Green for the Green Party.

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

Different types in cell development glass dishes on desk. Group of Petri dishes with different culture media and micro organisms grown.

Science background with molecule or atom

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

Photomicrograph of rotifer, probably Rotaria rotatoria. Rapidly rotating cilia at top of head, internal organs visible. Green circles are algae. Live specimen. Original image at 40X, wet mount, transmitted brightfield illumination. Indistinct image due to motion blur of live specimen and very shallow depth of field of brightfield illumination.

The glucagon like peptide-1 receptor (GLPr) is a G proteincoupled receptor (GPCR) that mediates the action of GLP-1, a peptide hormone. The activated receptor has a strong effect on the management of type 2 diabetes mellitus and obesity, including glucose homeostasis and regulation of gastric motility and food intake.

San Marcos, USA - July 5, 2011: QuickBooks box on graphs and pen. Quickbooks is an accounting software program created by INTUIT corporation. It is the most popular accounting software program for small business with over 90% market share.

Eco friendly products. Sanitary napkin and cotton plant flower. The girl shows a cotton sanitary pad against the background of her panties. Concept of plastic-free products for women menstruation.

Vaginal gynecological speculum for cytology

Isolated minoxidil chemical molecule structure in the white background 3d rendering

Liver Fluke Section under light microscope with white background

Neohalicholactone is unusual fatty acid metabolites having a cyclopropane ring and a nine-membered lactone. 3d illustration

Endosomes - 3d rendered image of Endosomes are membrane-bound organelles. They are parts of endocytic membrane transport pathway. Endomembrane system in cells. Bilayer Lipid Membrane. Abstract medical illustration. Microscopic view. Microbiologic research concept.

$The angiotensin converting enzyme 2 (ACE2, blue) in complex with the amino acid transporter BOAT 1 (violet). ACE2 is involved in control of blood pressure and is the target for the SARS-CoV-2 virus to infect human cells..\$

Free Images: "bestof:HomolyticcleavageofPMMA.gif en Homolytic Cleavage of PMMA polymer own Chem540f09grp11 2009-11-21 Organic reactions"

$Wenker Synthesis.svg$

Grignard degradation mechanism V3-Seite001.svg

Fukuyama indole synthesis Ü1-Seite001.svg

Fukuyama indole synthesis Ü3-Seite001.svg

Gomberg-Bachmann-Reaktion Ü2-Seite001.svg

Gomberg Bachmann reaction mechn-Seite001.svg

Suzuki cross-coupling mechan-Seite001.svg

Haller-Bauer reaction mechanism V2-Seite001.svg

Eglinton reaction mechanism V6-Seite001.svg

Grundmann aldehyd synthesis V3-Seite001.svg

Fukuyama indole synthesis mech-Seite002.svg

Fukuyama indole synthesis mech-Seite003.svg

Fukuyama indole synthesis mech-Seite001.svg

Gomberg Bachmann reaction mechn-Seite002.svg

Weiss reaction mechanism, Michael addition-Seite001.svg

Fukuyama indole synthesis mech2-Seite001.svg

Fukuyama indole synthesis mech1 V1-Seite001.svg

Alcohols - 8 (mesylation-halogenation).svg

Emulsion polymerization mechanisms-fr.svg

Intermolecular Grignard’s alkene addition.svg

Reaction of Propan-1-ol and Copper(II) oxide to Propionaldehyde.svg

Star shaped polymers from anionic polymerization - combined.png