Chromatography
... Chromatography theory
2.1 Retention
2.2
plate theory
3 Paper chromatography
4 Thin ... There are two theories of chromatography, the
plate and rate theories.
Retention
The ... under absolutely identical conditions.
plate theory
...
Muscle
... pyramidal tract to the spinal cord and from there to the motor end
plate at the muscles. Along the way, feedback loops such as that of the ... disease to Creutzfeldt-Jakob disease .
Diseases of the motor end
plate include myasthenia gravis , a form of muscle weakness due to antibodies ...
Neural plate
... The neural
plate is thick and flat bundle of ectoderm which develops in the embryo into the nervous system . In the development sequence, the neural
plate forms the neural tube which then forms the CNS ( central nervous system ...
Apoptosis
... selective apoptosis, sculpts developing tissues in vertebrates. During vertebrate embryo development, structures called the notochord and the floor
plate secrete a gradient of the signaling molecule Sonic hedgehog (Shh), and it is this gradient that directs cells to form patterns in the embryonic ...
Bone
... body of the bone; region of primary ossification
Epiphysis
the end regions of the bone; regions of secondary ossification
Epiphyseal
plate
the thin sheet of bone marking the fusion of epiphyses to the diaphysis (adults only)
Head
the proximal articular end of the bone
...
Cartilage
... cartilage) is degraded, resulting in limitation of movement and pain.
Achondroplasia : Reduced proliferation of chondrocytes in the epiphyseal
plate of long bones results in a form of dwarfism .
Costochondritis : Inflammation of cartilage in the ribs which causes chest pain
Herniated disk ...
Metaphase
... daughter cells.
One of the cell cycle "checkpoints " occurs during metaphase. Only after all chromosomes have become aligned at the metaphase
plate does the cell enter anaphase . This is accomplished by regulation of the APC, securin, and separase.
Metaphase is preceded by prophase and ...
Microbiology
... colonies from their specific locations on one agar-filled petri dish to analogous locations on several other petri dishes. After replicating a
plate of E. coli , they exposed each of the new plates to a bacteriophage (also called phage). They observed that phage-resistant colonies were present ...
Microscope
... is a microscope that uses only one lens for magnification. Van Leeuwenhoek 's microscopes consisted of a single, small, convex lens mounted on a
plate with a mechanism to hold the material to be examined (the sample or specimen). This use of a single, convex lens to magnify objects for viewing is ...
Mitosis
... are attached to microtubules emanating from each centriole - they line up in the middle of the spindle, forming what is called the metaphase
plate . This does not occur in every organism - in some cases chromosomes move back and forth between the centrioles randomly, only roughly lining up along ...
Neural tube
... of an invagination of the ectoderm following gastrulation . This process is induced by signaling molecules produced in the notochord and basal
plate .
Neural tube defects
Normally the closure of the neural tube occurs around the 30th day after fertilization . However, if something ...
Mitosis
... are attached to microtubules emanating from each centriole - they line up in the middle of the spindle, forming what is called the metaphase
plate . This does not occur in every organism - in some cases chromosomes move back and forth between the centrioles randomly, only roughly lining up along ...
Virus
... Marburg , first discovered in 1967 in Marburg Germany, and ebola . Filovirus are long, worm-like virus particles that, in large groups, resemble a
plate of noodles. Marburg virus has infected humans in 35 documented cases, killing seven. There are four types of ebola: Ebola-Ivory coast, Ebola-Sudan, ...