poniedziałek, 11 grudnia 2017
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Chemia/Biochemia (847)

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! EN_01178034_0001 SCI
PLGA biomedical device, coloured scanning electron micrograph (SEM). PLGA, or poly(lactic-co-glycolic acid), is a copolymer used in a variety of biomedical devices such as grafts, sutures (stitches), implants, prosthetic devices, and micro and nanoparticles for drug delivery. PLGA is particularly well suited to these uses as a result of its biodegradability and bio-compatibility - It breaks down in the body to produce lactic acid and glycolic acid, both of which occur naturally in the body. One PLGA drug delivery device is currently used for the treatment of prostate cancer.
! EN_01178034_0002 SCI
Antimicrobial wound dressing. Coloured scanning electron micrograph (SEM) of fibres (diagonal) from an Aquacel Ag wound dressing. The fibres of this dressing are made from sodium carboxymethylcellulose (NaCMC) that contain 1.2 percent silver (coloured dots) in an ionic form. In the presence of sodium ions secreted from a wound, the silver ions are released and exert a sustained antimicrobial effect against a wide range of organisms including MRSA (methicillin-resistant ^IStaphylococcus aureus^i). This protects the wound and helps aid healing.
! EN_01178034_0006 SCI
Microsphere filter particles. Scanning electron micrograph (SEM) of cinchonidine-imprinted polymer microspheres. Cinchonidine is a poisonous alkaloid used in organic chemistry. These microscopic spheres have been chemically treated to bind to cinchonidine as a means of removing it from drinking water. Magnification: x2300 when printed 10 centimetres wide.
! EN_01178034_0007 SCI
Microsphere filter particles. Scanning electron micrograph (SEM) of cinchonidine-imprinted polymer microspheres. Cinchonidine is a poisonous alkaloid used in organic chemistry. These microscopic spheres have been chemically treated to bind to cinchonidine as a means of removing it from drinking water. Magnification: x9300 when printed 10 centimetres wide.
! EN_01178034_0008 SCI
Microsphere filter. Scanning electron micrograph (SEM) of chemically imprinted polymer microspheres in a fibre mesh. These microscopic spheres have been chemically treated to bind to certain chemicals as a means of removing them from drinking water. The spheres have been bound to the fibres to form a fibre mat so they can be used as a filter. Magnification: x1,700 when printed 10 centimetres wide.
! EN_01178034_0009 SCI
Facial scrub particles, SEM. Coloured scanning electron micrograph (SEM) of particles found within consumer facial scrub lotion. The large flakes are silica particles and the smaller spheres are tiny polyethylene 'microplastic' beads. The particles measuring only a few micrometres in diameter each act as exfoliating agents that help to remove dead skin cells when applied to the body. Microplastics are too small to be trapped during waste water treatment and eventually end up as in the ocean. It is thought that small marine animals ingest the microplastics and pass the pollutant up the food chain.
! EN_01178034_0010 SCI
PLGA microspheres, coloured scanning electron micrograph (SEM). PLGA, or poly(lactic-co-glycolic acid), is a copolymer used in a variety of biomedical devices such as grafts, sutures (stitches), implants, prosthetic devices, and micro and nanoparticles for drug delivery. PLGA is particularly well suited to these uses as a result of its biodegradability and bio-compatibility - It breaks down in the body to produce lactic acid and glycolic acid, both of which occur naturally in the body. One PLGA drug delivery device is currently used for the treatment of prostate cancer. Magnification: x2350, when printed 10 centimetres wide.
! EN_01178034_0011 SCI
Catalyst nanoparticle. Atom probe tomography (APT) image of a copper-cobalt-manganese catalyst nanoparticle showing its core (left) and outer shell (right). Cobalt atoms are blue, copper atoms are orange and manganese atoms are green. These nanoparticles can efficiently catalyse the production of the long-chain alcohols that are used in industrial chemistry. The outer shell is approximately 2 nanometres thick.
EN_00972257_2377 STO
Illustration of molecules
SPECIAL RATES FOR EDITORIAL AND BOOKS RF RATES FOR OTHER USE
EN_00962647_4073 VAL
molecule
SPECIAL RATES FOR EDITORIAL AND BOOKS RF RATES FOR OTHER USE
EN_00962661_1698 VAL
molecule
SPECIAL RATES FOR EDITORIAL AND BOOKS RF RATES FOR OTHER USE
EN_00957730_3122 PHO
Illustration of beakers.
EN_00957730_3126 PHO
An illustration of a microscope.
EN_00957730_3127 PHO
An illustration of a microscope.
! EN_01178034_0003 SCI
Stain and waterproof cotton. Coloured scanning electron micrograph (SEM) of cotton fibres covered in nanoparticles (grey). The covering of nanoparticles prevents any water or dirt particles from reaching the cotton. Magnification: x8,300 when printed at 10 centimetres wide.
! EN_01178034_0004 SCI
Stain and waterproof cotton. Coloured scanning electron micrograph (SEM) of cotton covered in nanoparticles (blue). The covering of nanoparticles prevents any water or dirt particles from reaching the cotton. Magnification: x16,600 when printed at 10 centimetres wide.
! EN_01178034_0005 SCI
Carbonyl iron powder (CIP), coloured scanning electron micrograph (SEM). This fine spherical powder is produced by the thermal decomposition of iron pentacarbonyl. It has a number of applications, including the production of diamond tools, microwave and radar absorbing materials, magnetic inks and in nutritional supplements. Magnification: 10,000 when printed at 10 centimetres wide.
EN_90286235_0305 PHO
Cutaway view of a helium atom displaying 1s & 2s orbitals.
EN_90286235_0253 PHO
Sarin nerve gas. Computer artwork of a molecule of the nerve gas Sarin (methylphosphoneflouridic, (1- methyl ester), chemical formula (C4. H10. O2.P.F)). The atoms are shown as spheres and are colour- coded: carbon (blue), oxygen (red), hydrogen (white), phosphorus (yellow), fluorine (green). The bonds between them are shown as cylinders. Sarin (also known as GB) is used in chemical weapons. It is deadly and works in minutes. Skin contact or inhalation leads to disruption of the nervous system leading to convulsions, paralysis and death.
EN_90286236_0070 PHO
Protein molecule.

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