公开(公告)号：US06462546B1

公开(公告)日：2002-10-08

申请号：US09700929

申请日：2000-11-21

申请人： Dieter Schmalbein ,  JinJie Jiang ,  Arthur H. Heiss ,  Ralph T. Weber ,  Andreas Kamlowski

发明人： Dieter Schmalbein ,  JinJie Jiang ,  Arthur H. Heiss ,  Ralph T. Weber ,  Andreas Kamlowski

IPC分类号： G01V300

CPC分类号： G01R33/307 ,  G01R33/60

摘要： A method and an apparatus for investigating the imperishability of n liquid foodstuffs using electron spin resonance (ESR) exposes samples of the foodstuffs to an elevated temperature for an extended time-period. At predetermined intervals during the period, the intensity of an ESR signal of each sample is measured and plotted vs. time in a diagram for that sample. The time of a superproportional increase in intensity is detected for each foodstuff. The number n of different foodstuffs is determined by dividing the predetermined interval by the measurement time. The n samples are investigated simultaneously by sequentially cycling the n samples through a common sample vessel. Each time, the intensity of the ESR signal of the sample is measured and then plotted in a diagram unique to that foodstuff. The sequence of foodstuffs are cycled through the sample vessel until a predetermined number m of measuring points per foodstuff has been attained.

摘要翻译： 使用电子自旋共振（ESR）研究n种液体食品不均匀性的方法和装置将食品样品暴露于升高的温度下延长时间。 在该期间的预定间隔，测量每个样品的ESR信号的强度，并对该样品的图中的时间作图。 每种食品都会检测到强度超比例增加的时间。 通过将预定间隔除以测量时间来确定不同食物的数量n。 通过将n个样品顺序循环通过普通的样品容器来同时研究n个样品。 每次测量样品的ESR信号的强度，然后绘制在该食品独特的图中。 食物的顺序循环通过样品容器，直到达到每个食物预定数量的测量点。

公开(公告)号：US08610434B2

公开(公告)日：2013-12-17

申请号：US13188270

申请日：2011-07-21

申请人： Arthur H. Heiss ,  Ajay Khatri

发明人： Arthur H. Heiss ,  Ajay Khatri

IPC分类号： G01V3/00

CPC分类号： F25B9/02 ,  F25B25/00 ,  G01N24/10 ,  G01R33/31 ,  G01R33/38 ,  G01R33/3806 ,  G01R33/60

摘要： In an electron paramagnetic resonance spectrometer, a closed cycle cryocooler is used to cool gaseous helium, which is then circulated around a sample to cool the sample by direct convection. Since the sample is not mechanically connected to the refrigerator, no vibrations are transmitted from the refrigerator to the sample and the sample can be quickly removed and replaced. The cooled helium can be passed through a Joule-Thomson expansion device before circulating the cooled helium around the sample to further cool the helium. In addition, a vacuum pump can be connected to the helium outlet after circulating the cooled helium around the sample to increase the pressure differential across the Joule-Thomson expansion device and further cool the helium. In order to raise the temperature of the cooled helium, a heater can be placed about the cooled helium line upstream from the sample.

摘要翻译： 在电子顺磁共振光谱仪中，使用封闭循环的低温冷却器来冷却气态氦气，然后将其循环在样品周围，通过直接对流冷却样品。 由于样品没有机械地连接到冰箱，所以没有振动从冰箱传输到样品，并且可以快速地取出和更换样品。 冷却的氦气可以通过焦耳 - 汤姆逊膨胀装置，然后将冷却的氦气循环到样品周围，以进一步冷却氦气。 此外，在将冷却的氦气循环到样品周围之后，真空泵可以连接到氦出口，以增加焦耳 - 汤姆森膨胀装置的压差，并进一步冷却氦气。 为了提高冷氦的温度，可以在样品上游的冷却氦管线周围放置加热器。