The structure and working principle of the devices for melting point measurement by means of thin film comparative method of cryoscopy were introduced.
Nonnatural amino acid 3-(4-thiazolyl)-D,L-alanine hydrochloride and its four intermediates were synthesized, their structures were detenmined by IR,NMR,elementary analysis and melting point.
The paper is made by the dividable composite fibers(DCF) and ES fibers, the proportioning of the two kinds of fibers effects the absorption and tensile strength of the paper distinctly.
Rapid growth of “mother dendrites” in a given location of a melt at just below the liquidus temperature, that growth being the result of rapid heat extraction from the melt, or from recalescence.