Occasionally I will come across articles that refer to back-crossing mice of one strain onto the background other another strain (e.g., C57Bl6). They do not explicitly state the purpose for doing s…
What is biodiversity? Definition and explanation: The term biodiversity describes as part of biodiversity the totality of all animal and plant species as well as all microorganisms and fungi that inhabit a certain area. Depending on whether some species dominate in the region in question and others are rare or all the species living there are about the same number, species diversity is considered to be smaller or larger.
Information and Definition: "Only act on the maxim that you want at the same time to become a universal law." - Immanuel Kant Altruismus (from the Latin age = the other) refers to selfless behavior, in which by using personal resources a service is provided, without requiring or to expect a return for it.
Discovery, structure and function The neurotransmitter acetylcholine (ACh) is considered the most important neurotransmitter due to its elementary control function of vegetative processes in vertebrates. In 1921, acetylcholine, the first neurotransmitter ever, was discovered by pharmacologist Otto Loewi in experiments with frog hearts.
Species genesis through geographical isolation Allopatric speciation is considered one of the main reasons for the emergence of new species and requires a geographical isolation of at least two subpopulations. Reasons for this kind of geographical separation can be, for example: Continental drift Mountain formation Climate change (eg.
Characteristics Name: Pineapple Latin name: Pineapple comosus Number of Species: 8 species Family: Bromeliaceae Production area: along the equator; Tropics Distribution: Caribbean Harvest: all year Growth: max. 50cm Age: perennial herb Calories: 100g = approx. 220kcal Fruit color: yellow Weight: 1 - 4.5kg Size: 10 - 50cm Contained vitamins: Vitamin A, B1, B2, C, E Minerals contained: calcium, potassium, phosphorus, Iron Taste: sweet Interesting about pineapples The tropical genus Pineapple, which belongs to the family of bromeliads, contains eight species.
Atomic mass, symbol and atomic number Argon is a naturally occurring element with the elementary symbol Ar and the atomic number 18. In the periodic table it stands with an atomic mass of 39,948 u in the 8th main group. The chemical element discovered by William Ramsay in 1895 is not radioactive and is in a gaseous state at room temperature.
Character Name: Akita Alternative Names: Akita-inu Original Origin: Japan FCI Group: Tip and canine of the Urtyp Size (): up to 70cm Height (): up to 65cm Weight (): up to 50kg Weight (): up to 40kg Life expectancy: 8 - 14 years Nutrition: carnivore Sexual maturity: Litter size: 7 - 9 Coat color: sesame-colored on the back, white on the belly Skin type: dense upper coat, soft undercoat Coat length: short to medium-long Character / character: self-confident, calm, focused, intelligent Attitude: Needs a lot of run-off Akita - Introductory Information The Akita is considered one of the most popular dog breeds and important national good in its native Japan, as it is closely interwoven with the country's culture.
Characteristics: Name: Alabaster Other names: / Mineral class: hydrous sulfates without foreign anions Chemical formula: CaSO 4 · 2 H 2 O Chemical elements: calcium, sulfur, oxygen, hydrogen Similar minerals: gypsum Color: white, yellow, pink, brown, gray gloss: glass gloss, pearlescent crystal structure: monoclinic mass density: 2.2 magnetism: non-magnetic Mohs hardness: 1 - 2 stroke color: white transparency: transparent to translucent use: handicraft general to the alabaster: Alabaster describes a natural stone, which as variety of the gypsum to the Calcium sulphates heard.
Table: Comparison of electron, neutron and proton electron neutron proton symbol e - np + charge negative neutral positive element charge -1 0 +1 mass 0.00054 u 1.00866 u 1.00727 u quarks / 2 down, 1 up 1 down, 2 Up Place in the atom Atomic shell Atomic nucleus Atomic nucleus Antiparticle Positron Antineutron Antiproton
Living thing or no living thing? The vast majority of biologists and scientists believe that viruses are not living things. On the one hand, because a virus does not have its own metabolism. On the other hand, because it can not multiply without a foreign host cell. For viruses 'infiltrate' into other host cells and reprogram them so that only their own virus DNA is read and replicated, instead of the actual DNA of the cell.
Wanted: Name: Bauxite Other names: / Mineral class: Chemical formula: approximate Al 2 O 3 · H 2 O Chemical elements: aluminum, oxygen, hydrogen Similar minerals: laterite Color: brown-red Luster: / Crystal structure:? Bulk density:? Magnetism: non-magnetic Mohs hardness: approx.
Character Title: Beagle Alternate Names: / Origin: United Kingdom FCI Group: Running Dogs, Swallowing Dogs and Allied Breeds Size (): up to 40cm in height (): up to 40cm in weight (): up to 18kg in weight (): up to 18kg in life expectancy : 10 - 16 years Nutrition: Carnivore Sexual maturity: Litter size: 7 - 9 Coat color: white, brown and black Coat type: dense Coat length: very short Character / Essence: outgoing, active, curious Posture: requires a lot of exercise Beagle - Introductory Information The Beagle is from Great Britain, where this dogged and eager dog was used in large packs to hunt bunnies.
Characteristics Name: Bernese Mountain Dog Alternative Names: Dürrbächler Original Origin: Switzerland FCI Group: Pinscher and Schnauzer Size (): up to 70cm Height (): up to 65cm Weight (): 40 - 50kg Weight (): 35 - 45kg Life expectancy: 5 - 8 years Nutrition: Carnivore Sexual maturity: Litter size: 6 - 9 Coat color: predominantly black Fur type: soft Coat length: medium character / loyal, loyal, peaceful, patient Posture: needs plenty of exercise and human affection Bernese Mountain Dog - introduction information As its name implies betrays, comes the Bernese mountain dog from the Bernese Oberland, where he already in the 19.
Atomic mass, symbol and atomic number Beryllium is a naturally occurring element with the element symbol Be and the ordinal number 4. In the periodic table it stands with an atomic mass of 9,012 u in the 2nd main group. The chemical element discovered by Louis-Nicolas Vauquelin in 1798 is not radioactive and is in a solid state at room temperature.
Atomic mass, symbol and atomic number Bismuth is a naturally occurring element with the element symbol Bi and the atomic number 83. In the periodic table it stands with an atomic mass of 208,980 u in the 5th main group. The chemical element discovered by Claude Geoffroy in 1753 is not radioactive and is in a solid state of aggregation at room temperature.
Characteristics Name: Blue Iron Hat Latin name: Aconitum napellus Other names: poison, wolf, wolf poison, goat's death Plant family: HahnenfuЯgewchsse Number of species: approx. 350 species Origin: Central Europe Original distribution: Siberia Plant location: sunny, leaves: alternate, lenght , dark green fruits:?
Atomic mass, symbol and atomic number Bromine is a naturally occurring element with the element symbol Br and the ordinal number 35. In the periodic table it stands with an atomic mass of 79.904 u in the 7th main group. The chemical element discovered by Antoine Balard in 1826 is not radioactive and is in a liquid state at room temperature.
Atomic mass, symbol and atomic number Cesium is a naturally occurring element with the element symbol Cs and atomic number 55. In the periodic table it stands with an atomic mass of 132.90 u in the 1st main group. The chemical element discovered by Robert Bunsen in 1861 is not radioactive and is in a solid state of aggregation at room temperature.
Wanted: Name: Pumice Other Names: Pumice, Schaumstein, Pumex, Pumice Mineral class:? Chemical formula: approximately SiO 2 + Fe + Al + C + Na + Mg + Ca Chemical elements: silicon, oxygen, iron, aluminum, carbon, sodium, magnesium, calcium Similar minerals: obsidian Color: white, yellow, gray, black, Brown Gloss: Matt Crystal Structure: / Bulk Density:?
Wanted: Name: Cinnabarit Other Names: Mercurial, Mercury, Cinnabar Mineral: Sulfides Chemical Formula: HgS Chemicals: Mercury, Sulfur Related Minerals: Cuprite, Proustite, Ruby Sulfur Color: vermillion Shiny: Diamond Shining Possible Crystal Structure: Trigonal Mass Density: 8.2 Magnetism : Diamagnetism Mohs hardness: 2,5 Stroke color: red Transparency: translucent to opaque Use: industrial General information about cinnabarite: The cinnabar or cinnabar describes a common mineral, which is counted among the sulfides and sulfosalts.