LXXI.—Cryptopine and protopine. Section X

X-Ray Data Booklet Section 4.5 X-RAY DETECTORS

A wide variety of x-ray detectors is available, some counting single photons, some providing only measurements of count rate or total flux, others measuring the energy, position, and/or incidence time of each x-ray. Table 4-2 provides typical values for useful energy range, energy resolution, dead time per event, and maximum count rate capability for common x-ray detectors. For special applicat...

Section] Section] Section] Section] Section] Section] Section] Section] Section] 0

Qualitative and quantitative determination of protopine in Fumaria spp. by TLC-densitometry method

Article info: Received: 25 October 2012 Accepted: 21 December 2012 ABSTRACT A rapid and accurate TLC-densitometry method for qualitative and quantitative determination of protopine has been developed. The best separation was achieved using a mobile phase chloroform – ethyl acetate – methanol – ammonium hydroxide (80:80:40:0.05, v/v/v/v). The results obtained by this method (CV% 3.4) corresponde...

Section] Section] Section] Section] Section] Section] Section] Section] Section] Section] 0 Estimating Performance Measures in Stochastic Cyclic Schedules

This paper reviews a cyclic scheduling model of repetitive manufacturing environments consisting of exible machines and multi-stage jobs. We explicitly model two system performance measures, throughput and ow time, while incorporating variability arising from uncertainty in operation processing times. We present an iterative approximation scheme to estimate the two moment behavior of our perfor...

Section] Section] Section] Section] Section] Section] Section] Section] Section] 0 Some Convexity and Sensitivity Properties of the (r, T) Inventory Control Policy for Stochastic Demand

We show that long-run average cost function for the (R, T) policy with normally distributed demand has a structure similar to that of the corresponding (Q, r) model so that many of the useful properties of the latter model are applicable. In particular, (i) the optimal cost is relatively insensitive to the choice of the reorder interval, T, provided a near-optimal R corresponding to the chosen ...