Chemical Basis of Life Chemistry Atoms – smallest particle of an element Subatomic particles: * Protons * Neutrons * Electrons Molecules – a unit formed by 2 or more atoms joined together Elements Compounds Mass Weight Inorganic Compounds – molecules that do not necessarily contain a carbon Organic Compounds – always contain large amounts of carbon * theses are the molecules composing living things – organisms Biologically important Inorganic Molecules
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scrapings‚ etc. 3. Henry Dutrochet: (1824) France - Proposed that all living things were made of cells 4. Robert Brown: (1831) English - Observed plant and animal cells and named nucleus in both. 5. Matthias Schleiden: (1838) German - Discovered plants composed of cells 6. Theodor Schwann: (1839) German - Discovered animals composed of cells 7. Rudolph Virchow: (1855) German - Determined that cells come from other cells.
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Contributors to Microbiology Pioneers of Microbiology I. Antonie van Leeuwenhoek (Oct. 24‚ 1632- Aug. 30‚ 1723) A. In 1676 Leeuwenhoek saw tiny organisms in water‚ he was the first man to observe and describe bacteria accurately. He discovered microscopic nematodes‚ blood cells and sperm. He also made over 500 microscopes to view specific objects. B. Microbiology is concerned with the study of all forms of life that are too small to be seen with the naked eye. Antonie’s work
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clear pond water and discovered a wondrous world of living creatures. He named the tiny animals "animalcules." It took scientists more than 150 yrs. to fully appreciate the discoveries of Hooke and Leeuwenhoek. In 1838‚ the German botanist Matthias Schleiden concluded that cells compose not only the stems and roots but every part of a plant. A year later‚ the German zoologist Theodor Shwann made the same claim about animals. And in 1858‚ a German physician Rudolph Virchow observed that cells come
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magnification and resolution and allowed visualization of objects less than 1 μm. 1000-1500x magnification Beginning of Cell Theory Robert Brown (botanist) - noticed that every plant cell contained a round structure called it ‘kernel’-nucleus Matthias Schleiden (another botanist) - all plant tissues are composed of cells; embryonic plant always arose from a single cell Theodor Schwann (zoologist) - similar observations in animal cells; recognition of structural similarities btw plants and animals
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Frogs Jump. Once upon a time‚ there was a frog. This frog was named Matthias. He had four legs that were used for getting around. Matthias was green‚ he walked on all four of his feet. He lived in a pond‚ in the enchanted Rainforest in Africa. He lived with his grandparents. Matthias has no siblings and no parents. They got attacked by the evil snakes. The frog population was at risk‚ due to the frequent snake attacks. So‚ Matthias started to build forts‚ for his‚ his grandparents‚ and his populations
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A Low-Power CoAP for Contiki Matthias Kovatsch‚ Simon Duquennoy‚ and Adam Dunkels kovatsch@inf.ethz.ch simonduq@sics.se adam@sics.se Monday‚ 17 Oct 2011 Internet of Things Protocol Stack Layer Application Transport Network Adaption MAC Radio Duty Cycling Physical Matthias Kovatsch – ETH Zürich Protocol CoAP / REST Engine (Erbium) UDP IPv6 / RPL 6LoWPAN CSMA / link-layer bursts ContikiMAC IEEE 802.15.4 A Low-Power CoAP for Contiki 2 ContikiMAC Radio on D Data frame A ACK frame
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multiplying. His discovery was important in disproving the spontaneous generation theory of cells‚ in which cells were created out of nothing. In 1831 a British botanist Robert Brown noticed what he named the cell nucleus‚ which biologist Mathias Schleiden suggested might be important
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Animal rights and animal welfare fall at different points on a continuum that runs from animal liberation at one end to animal exploitation at the other. The animal rights viewpoint can be defined as the belief that humans do not have the right to use animals for their own gainin the laboratory‚ on the farm‚ in entertainment or in the wild. The degree to which humans may benefit from any use of nonhuman animals is irrelevant to determine how animals should be treated. The animal welfare viewpoint
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main character and narrator‚ Jakob‚ was serendipitously physically saved from the way by the Greek scientist Athos Roussos. Over time‚ Jakob grew into a person who could only be defined through true silence‚ which was seen in his relationship with Athos‚ his romantic links‚ and his connection with geographic locations and languages. It is in these ties of Jakob’s life the only language he is fluent in is evident: silence. When Athos first starts taking care of Jakob‚ he notes that “sometimes I can’t
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