Science / Tides and Currents / P1: Rate of change (as of January 1, 1900) in mean longitude of solar perigee. P1 = 0.000,001,96° per solar hour.

P1-Derived Artificial Chromosome (PAC)

Science / Genetics / P1-Derived Artificial Chromosome (PAC): One type of vector used to clone dna fragments (100- to 300-kb insert size: average, 150 kb) in escherichia coli cells. Based on bacteriophage (a virus) p1 genome. MORE


Science / Spiders / Metatarsus: (p1. metatarsi: adj. metatarsal) The sixth segment of the leg, counting from the body. MORE


Science / Tides and Currents / K1: Lunisolar diurnal constituent. This constituent, with O1, expresses the effect of the Moon's declination. They account for diurnal inequality and, at extremes, diurnal tides. With P1, it expresses the MORE


Science / Tides and Currents / T2: Larger solar elliptic constituent. See R2. Speed = 2T – h + p1 = 29.958,933,3° per solar hour. MORE

Boron (B)

Science / Periodic Table of Elements / Boron (B): Atomic number: 5, Atomic mass: 10.81 g.mol -1, Electronegativity: 2.0, Density: 2.3 g.cm-3 at 20°C, Melting point: 2076 °C, Boiling point: 3927 °C, Vanderwaals radius: 0.098 nm, Ionic radius: 0.027 MORE


Science / Tides and Currents / R2: Smaller solar elliptic constituent. This constituent, with T2, modulates the amplitude and frequency of S2 for the effect of variation in the Earth's orbital speed due to its elliptical orbit. Speed = MORE