The varying success of known chromat’ographic procedures for the separation and identification of microquantities of estrogens (1, 2) has led to the development of paper partit!ion chromatographic techniques which are reported here. These t’echniques permit rapid separation, identification, and quantitative estimation of free est.rogens in biological materials. The solvent systems of o-dichloro...

Privilege separation is a fundamental security concept that has been used in designing many secure systems. A number of recent works propose redesigning web browsers with greater privilege separation for better security. In practice, however, privilege-separated designs require a fine balance between security benefits and other competing concerns, such as performance. In fact, performance overh...

Separation of alkyl sulfate ethoxymers is investigated on various high-performance liquid chromatography (HPLC) stationary phases: Acclaim C18 Surfactant, Surfactant C8, and Hypercarb. For a fixed alkyl chain length, ethoxymers are eluted in the order of increasing number of ethoxylated units on Acclaim C18 Surfactant, whereas a reversed elution order is observed on Surfactant C8 and Hypercarb....

c d i d t s p T l b c bstract. This paper proposes a method of six-color separation sing additional colorants and a quantitative granularity metric to educe the color difference and graininess. In conventional six-color eparation, the use of light magenta and light cyan is generally an ffective way of reducing the visibility of dots in bilevel printing deices, i.e., light magenta and light cyan...

In the course of experiments on the enzymatic transformation of steroids we were confronted with the problem of determining quantitatively small amounts of progesterone and pregnenolone (A6-pregnene-3@-ol-20-one). While progesterone can be easily estimated by its absorption maximum at 240 rnp, no spectrophotometric method has been known thus far for the determination of steroids with a ketone g...

The rise of multi-drug resistance has decreased the effectiveness of antibiotics, which has led to increased mortality rates associated with symptomatic bacteremia, or bacterial sepsis. To combat decreasing antibiotic effectiveness, extracorporeal bacterial separation approaches have been proposed to capture and separate bacteria from blood. However, bacteremia is dynamic and involves host-path...