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10/21/2022

Mars - Valles Marineris⁠

Animation of a flight over Mars, passing over the extensive Valles Marineris canyon system. This is an extensive system stretching some 4000 kilometers and reaching 200 kilometers wide and seven kilometers deep. ⁠

© Mark Garlick / Science Source ⁠

ScienceSource.com image ID: SS1413448⁠

Click on the link in our bio for this clips and for more science and medical content.⁠

Capsaicin Receptor... why peppers feel "hot"The capsaicin receptor is a protein that, in humans, is encoded by the TRPV1...
10/13/2022

Capsaicin Receptor... why peppers feel "hot"

The capsaicin receptor is a protein that, in humans, is encoded by the TRPV1 gene. The function of TRPV1 is detection and regulation of body temperature. In addition, TRPV1 provides a sensation of scalding heat and pain. TRPV1 is an element of the mammalian somatosensory system. It is a nonselective cation channel that may be activated by a variety physical and chemical stimuli. The best-known activators of TRPV1 are: temperature greater than 43 °C (109 °F); acidic conditions; capsaicin (the irritating compound in hot chili peppers); and allyl isothiocyanate, the pungent compound in mustard and wasabi. The activation of TRPV1 leads to a painful, burning sensation.

© Juan Gaertner / Science Source

ScienceSource.com image ID: SS1417074

Click on the following link for this image and for more science and medical content (including video!).⁠

https://www.sciencesource.com/archive/Image/The-capsaicin-receptor-TRPV1-with-4-ligand-analogons-bound-SS1417074.html

Muscle tissue, microscopic viewClick on the following link for this image and for more science and medical content (incl...
10/12/2022

Muscle tissue, microscopic view

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https://www.sciencesource.com/archive/Image/Muscle-Tissue--SEM-SS1393902.html

Scanning electron microscope image of muscle tissue. The large packets are individual, crosswise sectioned muscle cells. The myofibrils create a rhythmic structure. The muscle cells are surrounded by connective tissue (white-blue) which also contains capillary vessels (yellow) with some red blood cells (light red).

Magnification 3000x (when 15cm wide).

© Eye of Science / Science Source

ScienceSource.com image ID: SS1393902

Streptococcus BacteriaStreptococcus bacteria are an example of cocci (round bacteria) that form chains. There are curren...
10/03/2022

Streptococcus Bacteria

Streptococcus bacteria are an example of cocci (round bacteria) that form chains. There are currently over 50 species of Streptococcus, which are classified based on their haemolytic properties. While some species cause disease in humans, many streptococcal species are non-pathogenic and form part of the human microbiota of the mouth, skin, intestine, and upper respiratory tract.
Magnification: 25,000x at 15 cm wide

© Nano Creative / Science Source

ScienceSource.com image ID: SS21434554

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https://www.sciencesource.com/archive/Image/Streptococcus-Bacteria--SEM-SS21434554.html

Retina and Eye LayersImage 1: Retina layers. From bottom to top: rods and cones, outer nuclear, outer plexiform, inner n...
09/30/2022

Retina and Eye Layers

Image 1: Retina layers. From bottom to top: rods and cones, outer nuclear, outer plexiform, inner nuclear, inner plexiform, ganglion cell, and nerve fiber layers.
© Jose Luis Calvo/Science Source
ScienceSource.com image ID: SS1251561

Image 2: Light micrograph showing, from top to bottom, the conjunctiva, a mucosa layer composed of non-keratinized, stratified squamous epithelium and subepithelial connective tissue stroma (lamina propria) with blood vessels and cross-sectioned striated muscle fibers (oculomotor muscle insertion), the sclera that appears as a pink layer with many collagen fibers, the pigmented choroid and the retina.
© Jose Luis Calvo / Science Source
ScienceSource.com image ID: SS1251555

Click on the following link for wall art, cell phone cases and other products based on this image and many other science images.⁠

https://prints.sciencesource.com/art/calvo+eye?searchType=keywordsartistname

Volvox - Colonial AlgaeVolvox is a colonial chlorophyte green algae found in freshwater ponds and lakes. It consists of ...
09/28/2022

Volvox - Colonial Algae

Volvox is a colonial chlorophyte green algae found in freshwater ponds and lakes. It consists of a hollow ball of several thousand cells, each with a chloroplast and a pair of flagella. It reproduces asexually by budding off daughter colonies which rotate in the interior until they escape.

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https://www.sciencesource.com/asset-management?FR_=1&W=1440&H=672#/DamView&VBID=2OPVHKRTMR07L

Image 1) Light micrograph of Volvox tertius, swimming. Zygospores.
Zeiss Tessovar x10. Darkground. Illumiitran flash. HFW = 3.5mm
© M. I. Walker / Science Source
ScienceSource.com image ID: SS1123835

Image 2) Volvox tertius, living. Rheinberg Illumination. Horizontal Field Width = 125 micrometers.
© M. I. Walker / Science Source
ScienceSource.com image ID: SS2449081

Malaria ParasiteCheck out the following link for an article at  that used this malaria image.  The article reports on re...
09/22/2022

Malaria Parasite

Check out the following link for an article at that used this malaria image. The article reports on research into using actual mosquitos to deliver live Plasmodium parasites that do not get people sick. The parasites have been genetically modified with to help create an immune response without infecting the recipient.

https://www.npr.org/sections/goatsandsoda/2022/09/21/1112727841/a-box-of-200-mosquitoes-did-the-vaccinating-in-this-malaria-trial-thats-not-a-jo

Image caption: Freeze-fractured transmission electron micrograph (TEM) of a section through a red blood cell infected with malarial parasites (Plasmodium sp.). The blood cell appears pear-shaped. Single-celled malaria parasites are in the swollen part of the blood cell (green).

© Dr. Tony Brain/Science Source

ScienceSource.com image ID: SS2100645

09/16/2022

Copper Reacts with Silver nitrate.

Copper is immersed into a 0.2M solution of silver nitrate (AgNO3).

Since copper is more reactive than silver, a single-displacement reaction occurs: Cu + AgNO3 -> Ag + Cu(NO3)2.

Formation of silver metal (Ag) is clearly visible.

As reaction progresses, the solution becomes slightly bluish due to Cu2+ ions.

Time-lapse Video:

Penny - 45 minutes
Straight wire - 36 minutes
Spiral wire - 24 minutes
Wire in beaker - 40 minutes

© Turtle Rock Scientific / Science Source

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https://www.sciencesource.com/CS.aspx?VP3=DamView&VBID=2OPVHKRJCT2WV

ScienceSource.com image ID's: SS1411807, SS1411818, SS1411829, and SS1411840

Stinging NettleClick on the following link for wall art, mugs, cell phone cases, and other products based on this image ...
09/15/2022

Stinging Nettle

Click on the following link for wall art, mugs, cell phone cases, and other products based on this image and many more science photos.⁠

https://prints.sciencesource.com/featured/switch.html?catalogid=SS1410097

Scanning electron micrograph of the stem from a stinging nettle (Urtica dioica). The large stinging hairs are hollow tubes which act like tiny glass needles. The bulb at the base of each hair contains the stinging liquid (including formic acid, histamine and acetylcholine). The tips of the glassy hairs are easily broken when brushed, which easily pierces the skin to deliver the sting. The plant and roots have been used historically in alternative medicine to treat a variety of conditions, possibly by decreasing inflammation and increasing urine output.

Width of image is 3 mm.

© Ted Kinsman / Science Source

ScienceSource.com image ID: SS1410097

Cilium Cross SectionCross-section through a cilium in human nasal epithelium.  Characteristic 9+2 microtubular elements ...
09/13/2022

Cilium Cross Section

Cross-section through a cilium in human nasal epithelium. Characteristic 9+2 microtubular elements and two dynein arms attached to each doublet element are evident. This level of ultrastructural organization is common to many eukaryotic cilia and flagella across the phylogenetic spectrum.

© J. L. Carson, Ph.D / Science Source

ScienceSource.com image ID: SS1410962 and SS1410963

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https://www.sciencesource.com/CS.aspx?VP3=DamView&VBID=2OPVHKR4XJGKQ

Insect GyroscopesScanning electron micrograph of a haltere. Halteres are a pair of small club-shaped organs on the body ...
09/12/2022

Insect Gyroscopes

Scanning electron micrograph of a haltere. Halteres are a pair of small club-shaped organs on the body of some flying insects (e.g. diptera). Halteres provide information about body rotations during flight. Examples of insects with halteres are houseflies, mosquitoes, gnats, and craneflies. Halteres oscillate rapidly along with the wings and operate like vibrating structure gyroscopes.

© Eye of Science/Science Source

ScienceSource.com image ID: SS1393955

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https://www.sciencesource.com/archive/Image/Haltere--SEM-SS1393955.html

08/29/2022

Gravitational Lensing

Gravitational lensing is the effect in which the image of a distant object is distorted by the gravitational field of an object in front of it. Initially, a distant galaxy is at the top, and the Earth at bottom. Diverging light rays from the galaxy are shown in white. If a massive object is placed in the middle, relativity predicts that the light will be bent towards the mass, in effect focusing it on Earth like a converging lens. Different arrangements produce slightly different effects. A single large mass can produce a ring with a bright central spot or multiple images forming a cross. When the lensing object is a massive cluster of galaxies, images of the more distant galaxy are likely to be smeared into thin irregular arcs.

ScienceSource.com image ID: SS220023

Credit: M. Kornmesser/Lars Lindberg Christensen/ESA/Hubble/ SPL/Science Source

Click on the following link for this clip and for more science and medical content.⁠

https://www.sciencesource.com/archive/Video/Gravitational-lensing-demonstration-SS220023.html

08/29/2022

Gravitational Lensing⁠

Gravitational lensing is the effect in which the image of a distant object is distorted by the gravitational field of an object in front of it. Initially, a distant galaxy is at the top, and the Earth at bottom. Diverging light rays from the galaxy are shown in white. If a massive object is placed in the middle, relativity predicts that the light will be bent towards the mass, in effect focusing it on Earth like a converging lens. Different arrangements produce slightly different effects. A single large mass can produce a ring with a bright central spot or multiple images forming a cross. When the lensing object is a massive cluster of galaxies, images of the more distant galaxy are likely to be smeared into thin irregular arcs.⁠

ScienceSource.com image ID: SS220023⁠

Credit: M. Kornmesser/Lars Lindberg Christensen/ESA/Hubble/ SPL/Science Source⁠

Click on the link in our bio for this clip and for more science and medical content.⁠

Click on the following link for this clip and for more science and medical content.⁠

https://www.sciencesource.com/archive/Video/Gravitational-lensing-demonstration-SS220023.html⁠

Immune checkpoint inhibitors: PD-1, CTLA_4 and PD-1 blocked by therapeutic antibodiesClick on the following link for thi...
08/26/2022

Immune checkpoint inhibitors: PD-1, CTLA_4 and PD-1 blocked by therapeutic antibodies

Click on the following link for this image and for more science and medical content (including video!).⁠

https://www.sciencesource.com/archive/Image/Immune-checkpoint-inhibitors--PD-1--CTLA-4-and-PD-1-blocked-by-therapeutic-antibodies-SS1405325.html

Immune checkpoints are regulators of the immune system. Antibodies block PD-L1 (red) on the surface of a cancer cell and the immune checkpoints PD-1 (blue) and CTLA.-4 (violet) on a T-cell. The activation of PD-1 and CTLA-4 would inhibit T-cells killing tumor cells.

© Juan Gaertner / Science Source

ScienceSource.com image ID: SS1405325

Scale insectsScale insects (superfamily Coccoidea) have shield-like exoskeletons (strong and rigid outer skeleton). Scal...
08/24/2022

Scale insects

Scale insects (superfamily Coccoidea) have shield-like exoskeletons (strong and rigid outer skeleton). Scale insects are plant parasites that feed on sap from the host plant. They secrete a waxy coating on their exoskeleton to protect themselves from pesticides and predators.

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https://www.sciencesource.com/Share/af4omg38dl1crf73o7r2s6onefp2jy02

Image 1: Scanning electron micrograph (SEM) of a female scale insect showing its shield-like exoskeleton and antennae (lower left)

Image 2: Scanning electron micrograph (SEM) of scale insects on a leaf.

Image 3: Scanning electron micrograph (SEM) of a scale insect on a leaf.

© Steve Gschmeissner / Science Source

ScienceSource.com image IDs: SS127501, SS2270499, and SS2764533

Amniotic SacScanning electron micrograph showing a freeze fracture of a human fetal membrane or amniotic sac in which th...
08/18/2022

Amniotic Sac

Scanning electron micrograph showing a freeze fracture of a human fetal membrane or amniotic sac in which the embryo develops. The upper (pink) part, the epithelium of the amnion looks towards the embryo. The compact layer is shown in brown here, followed by the fibroblast layer (yellow). The spongy layer is shown in grey, followed from the cellular and reticular layers (greenish). The layer on bottom containing a lot of cells is the trophoblast layer. Magnification 1000x (when 15cm wide)

© Eye of Science / Science Source

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https://www.sciencesource.com/archive/Image/Amniotic-Sac--SEM-SS1393966.html

Sepsis (blood cells and bacteria)Check out the article at Scientific American with our image."Algorithm That Detects Sep...
08/08/2022

Sepsis (blood cells and bacteria)

Check out the article at Scientific American with our image.

"Algorithm That Detects Sepsis Cut Deaths by Nearly 20 Percent"
By Sophie Bushwick on August 1, 2022

https://www.scientificamerican.com/article/algorithm-that-detects-sepsis-cut-deaths-by-nearly-20-percent/

Scanning electron micrograph (SEM). Bacteria amongst the red blood cells from the circulatory system.

When a strain of harmful bacteria gets into the bloodstream, the resulting infection is called bacterial sepsis, or bacteraemia (commonly known as blood poisoning). Multiplication of the harmful bacteria in the blood stream can cause death. When there is a high amount of toxins produced by bacteria in the blood, a septic shock may occur. Septic shock is a highly dangerous condition in which body tissues are damaged. This kind of infection can be serious, but it can usually be successfully treated with antibiotics, if caught early.

Magnification: 5000x when printed at 10 cm wide.

© Steve Gschmeissner / Science Source

ScienceSource.com image ID: SS21258002

TelomeresComputer artwork of an X and a Y chromosome. The end regions mark out the telomeres. Telomeres consist of short...
08/05/2022

Telomeres

Computer artwork of an X and a Y chromosome. The end regions mark out the telomeres. Telomeres consist of short repeated sequences of DNA and proteins, and are looped. The loop structure prevents the end of the chromosome being eroded by enzymes present in the cell nucleus and prevents enzymes from joining two chromosomes together. Telomeres play an important role in cellular aging. As cells replicate and age the telomere steadily shrinks. When the telomere reaches a certain length the cell stops dividing and dies.

© Nathan Devery / Science Source

ScienceSource.com image ID: SS2480329

Click on the following link for more science and medical content (images and video!).⁠

https://www.sciencesource.com/archive/Image/X-Y-Chromosome-Telomeres-SS2480329.html

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Es una página con información muy Interesante. Gracias por compartirlo
Une amibe vampire?
Vampyrella lateritia est une amibe appartenant au groupe des Rhizopodes et à l'ordre des Vampyrellida. Au stade trophozoite, elle peut se déplacer et percer la paroi des algues dont elle se nourrit de l'intérieur, tel un vampire végétarien!
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