The Abutilon genus from the Malvaceae family is of medicinal importance, and members of this genus are distributed in the tropical and subtropical regions of Asia and other parts of the world. Abutilon pakistanicum Jafri & Ali is mainly found in Pakistan. It Nike Jordan Shoes
has been used by different systems of traditional medicines to treat different diseases. Pakistamide C, a new sphingolipid, has been isolated from the ethyl acetate soluble fraction of the methanolic extract of A. pakistanicum. Different spectroscopic techniques such Air Jordan High Heels Canada as NMR (1H, 13C, COSY, NOESY, Air Jordan Shoes Online
HSQC, HMBC) and Mass spectrometry (EI-MS, and FAB-MS experiments) were used to elucidate the structure of pakistamide C.
We describe the process of depositing graphite-black on thin pyroelectric detector substrates and compare this with previous work on gold-black coating, documented in the literature. Spectrophotometric measurements indicate that graphite-coating reflectance, at normal incidence, varies by less than 5% from 250 to 2500 nm. The electrical characterization, indicates that graphite coating can be used for the radiant-electrical calibration of pyroelectric detectors. Measurements with electrical heating made on graphite resistance, indicate that the permissible absolute power that could measure the pyroelectric detector could measure, is a function of the graphite thickness.