A method for the determination of methoxyl and ethoxyl groups in organic compounds, in which the substance is heated with hydriodic acid; the iodoalkane thus formed is passed into an ethanolic solution of silver I nitrate, and the resulting silver I iodide weighed.
A steel-gray mineral, essentially sulphide of lead and antimony, PbSb2S4, occurring as columnar hex
Literally, a time-giver that synchronizes various rhythmic behaviours with external events.
The second stage of meiotic prophase, intervening between leptotene and pachytene, in which the chromatin threads approximate in pairs and become looped. See fig. at meiosis. zym-,
The variations in intensity in the electron beam of a cathode-ray tube which form the display or picture on a sweep or raster.
A bilaterally symmetrical flower or corolla which can only be divided into two halves by one vertical plane. Also irregular. Cf actinomorphic. Zygomycetes,
1 Residual time delay which has to be compensated in determining readings of range. 2 Error of any instrument when indicating zero, either by pointer, angle, or display,
A motile, usually naked, asexual ie not a gamete reproductive cell found in some algae and fungi, swimming by means of one to several flagella.
A faint illumination of the sky, lenticular in form and elongated in the direction of the ecliptic on either side of the Sun, fading away at about 90
The study of animal distribution,