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- Electron microscope (5936 bytes)
11: High [[voltage]] electron beams from a [[cathode]] are focused by [[magnet]]ic lense...
14: ...y detecting secondary electrons which are emitted from the surface due to excitation by the primary el...
22: *''Cryofixation'' - freezing a specimen so rapidly, to liquid nitrogen t...
28: ...the surface from an angle and sputtering material from the surface. A subclass of this is Focussed Ion...
36: ...his gives the problem of distinguishing artifacts from material, particularly in [[biology|biological]... - Electron (10516 bytes)
39: ...18(44) [[MeV]]{{inote|http://scienceworld.wolfram.com/physics/ElectronMass.html}}
54: ...rd ''electron'' was coined in 1894 and is derived from the term ''electric'', whose ultimate origin is...
70: ...e vibrations called phonons. When electrons move, free of the nuclei of atoms, and there is a net flow...
74: ...its vicinity, so that the properties one observes from far away are the sum of the bare properties and...
78: ...Note that this is the radius that one could infer from its charge if the physics were only described b...
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- Periodic table (7298 bytes)
- Sally Ride (1826 bytes)
1: ...3]]) and [[Svetlana Savitskaya]] ([[1982]]), both from the former [[Soviet Union]].
5: ...n [[astrophysics]], [[general relativity]], and [[free-electron laser physics]]. She later became the ... - Lise Meitner (3907 bytes)
8: ...]], which is named for [[Pierre Victor Auger]], a French scientist who discovered the effect two years...
10: ...in]], who had the celebrity, to write President [[Franklin D. Roosevelt]] a warning letter, which led ...
12: ...er were awarded the [[Enrico Fermi Award]] with [[Fritz Straßann]]. On a visit to the USA in 1946 she...
17: *Otto Robert Frisch, (ed.) 1959. ''Trends in Atomic Physics: Essa...
25: .../13/3/1 A critical review of Patricia Rife's book from PhysicsWeb] - Actinium (7046 bytes)
110: | <sup>221</sup>[[francium|Fr]]
119: | α || 5.536 || <sup>222</sup>[[francium|Fr]]
125: | α || 5.042 || <sup>223</sup>[[francium|Fr]]
141: ...ho separated it from [[uraninite|pitchblende]]. [[Friedrich Otto Giesel]] independently discovered act...
143: The word actinium comes from the Greek ''aktis, aktinos'', meaning beam or r... - Ant (13019 bytes)
17: ...g food, digging, or defense. Their color can vary from black, brown, red, to even green or blue in som...
21: Ants thrive in various habitats, from rainforests to deserts. They are terrestrial an...
43: ...Image: ants.jpg|400px|right|Fire ants, originally from South America.]]
52: ...ental processes in the insect world. This journey from egg to adult is a complex and meticulously orch...
61: ...time of transformation, where the ant transitions from its larval form to its adult form. - Timeline of invention (28171 bytes)
6: * 2.4 MYA: [[Oldowan|Stone tools]] in [[Africa]]
8: ...YA: Controlled [[fire]] in [[Cradle of Humankind|Africa]]
26: * [[Cloth]] woven from [[flax]] fiber
112: * [[1589]]: [[Stocking frame]]: [[William Lee]]
134: ...quadrant]]: [[Thomas Godfrey (inventor)|Thomas Godfrey]] - Chemistry (12553 bytes)
61: ...ar structure and composition. Similarly, theories from [[classical physics]] can be used to predict ma...
66: ... Physical properties, such as [[density]] and [[refractive index]] tend to fall within values characte...
93: ... intrinsic energy of the molecules themselves, or from an external source which will generally acceler... - History of science (41710 bytes)
6: ...r [[empirical]] [[truth]]. [[Philosophy]] differs from science in that, while both the [[Natural scien...
11: ...fic data is self-evident, value-free, and context-free.
21: ...ccount of the development of (natural) philosophy from ancient times until recent times can be found i...
27: ...rehistoric times, advice and knowledge was passed from generation to generation in an [[oral tradition...
52: ...oration by bringing together people and new ideas from all over the Islamic world. - Timeline of microscope technology (1673 bytes)
15: * [[1953]] - [[Frits Zernike]], professor of [[theoretical physics]... - Carnivorous plant (44834 bytes)
29: ...e leaves are quite clearly evolutionarily derived from a simple
46: rolled-leaf tube, and protects it from rain. Possibly because of this improved
52: pitted with areolae, which are [[chlorophyll]]-free patches through which light can penetrate.
54: ...once inside, tire themselves out trying to escape from these false
63: that project from the base of the operculum over the entrance to ... - Cell (biology) (28190 bytes)
3: ...are composed of one or more cells; all cells come from preexisting cells; all vital functions of an or...
5: The word ''[[cell]]'' comes from the [[Latin]] ''cella'', a small room. The nam...
15: ...ored in organic molecules. This energy is derived from [[metabolic pathway]]s.
23: ...they live alone or in groups. [[Organism]]s vary from single cells (called '''single-celled''' or '''...
34: ... which envelopes the cell, separates its interior from the surroundings, controls what moves in and o... - Microscope (8708 bytes)
16: [[image:Microscope.png|frame|none|Basic microscope main elements]]
29: [[Image:Microscope diagram.png|right|frame|Common optical microscope and its principal pa...
34: ...ns, they utilize light passing through the sample from below and special techniques are usually necess...
36: ...roscope is used, where the light is ''reflected'' from the examined surface. The light is fed th...
39: ...'dissecting microscope''' is designed differently from the diagrams above, and serves a different purp... - Endoplasmic reticulum (5319 bytes)
3: ...are to be secreted or "[[exocytosis|exocytosed]]" from the cell (e.g., digestive [[enzyme]]s).
19: ... a space, the cisternal space (or internal lumen) from the [[cytosol]]. This space is acting as a gate...
21: ...bosomes on the surface of the rough ER insert the freshly produced proteins directly into the ER, whic...
44: Only properly folded proteins are transported from the RER to the [[Golgi complex]].
48: ...ane. Proteins that are transported by the ER and from there throughout the cell are marked with an ad... - Mitochondrion (10103 bytes)
8: [[image:mitochondrion.png|frame|'''Cross-section of a mitochondrion, showing:'...
9: ...e-shaped organelle pictured to the right, ranging from 1 to 4 [[Micrometre|?m]] in length. At the othe...
51: ...heir physical tendency (in the "wrong" direction) from the matrix into the intermembrane space.
53: ...e complex can make [[Adenosine triphosphate|ATP]] from ADP and inorganic phosphate (P<sub>i</sub>). Th...
58: ...ics]] and [[evolutionary biology]] often use data from mitochondrial DNA sequences to draw conclusions... - Myofibril (4430 bytes)
2: ...)|cell]]s. They are bundles of filaments that run from one end of the cell to the other and are attach...
4: ... axis of the myofibril. The thin filaments extend from the dark boundary of a sarcomere into the regio...
7: ...ery dark colored bands called Z-discs or Z-lines (from the German "zwischen" meaning between). These Z...
11: ...isected by a dark central line called the M-line (from the German "mittel" meaning middle). - DNA (29095 bytes)
5: ...gical cell|cell]] organisms, DNA is not separated from the [[cytoplasm]] by a [[nuclear envelope]]. In...
10: ...e-but-impossible-to-read one! It has been assumed from the beginning that this is not necessarily a ve...
14: ...only'' contained scientific data -- that would be frustrating, wouldn't it?
31: ...lit half of the strand plus the bases it collects from the soup will ideally end up as a complete repl...
35: ...or was unknown and only a DNA sample was obtained from the scene (particularly in [[rape]] cases betwe... - Lightning (33113 bytes)
10: ...shared some similarity with lightning. [[Benjamin Franklin]] endeavored to test this theory by using a...
12: ... to a post with a [[silk]] thread. As time passed Franklin noticed the loose fibers on the string stre...
14: ... had conducted similar experiments in [[France]], Franklin had suggested the original high-object-with...
16: ...clothes singed, the engraver knocked out, the doorframe of the room split, and the door itself torn of...
18: Franklin also invented the [[lightning rod]], likely... - Computer (32773 bytes)
3: ...erical]] or [[logic]]al terms. Computers are made from [[digital circuit|components]] that perform sim...
24: ...logue]], [[digital]] and [[electronic]]. However, from the context of the citation, it is obvious thes...
39: *[[Mainframe|Mainframe computer]]
51: ...uter development means new uses for computers are frequently found and current definitions quickly bec...
54: ... purely [[electronic]] computers were constructed from [[thermionic valve]]s (tubes). In the [[1950s]]... - Allergy (18658 bytes)
1: ... known as [[allergen]]s. The word allergy derives from the [[Greek language|Greek]] words ''allos'' me...
4: ...e all [[hypersensitivities]] were thought to stem from the improper action of [[inflammatory]] [[immun...
16: ...allergic to [[house_dust_mite|dust mites]]. Apart from ambient allergens, allergic reactions can be du...
23: ...occur within 30 minutes. This response will range from slight reddening of the skin to full-blown [[hi...
39: ...bilitation is the removal of sources of allergens from the home environment, and avoiding environments... - Capacitor (29664 bytes)
9: [[Image:Dielectric.png|frame|The electrons in the molecules shift toward th...
14: :<math>C = \frac{Q}{V}</math>
32: :<math>i(t) = C \frac{dv(t)}{dt}</math>
34: The [[impedance]] in [[frequency domain]] can be written as
36: :<math>Z = \frac{1}{j \omega C} = - j X_C </math>
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