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Diana Ciuhandu Christine Degel Johanna Schreiber und G. Ciuhandu 《Fresenius' Journal of Analytical Chemistry》1978,292(1):48
Ohne Zusammenfassung
Separation and determination of 1-Aminoanthraquinone- and 1-Amino-4-bromoanthraquinone-2-sulphonic acid by paper chromatography相似文献
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Günther Hehl 《Fresenius' Journal of Analytical Chemistry》1973,266(4):268-272
Summary A suitable paper-chromatographic method for the serial determination of carbohydrates in plants is described. For the analysis of these substances conditioned both fresh and freeze-dried or better air-dried samples of plant material can be used. However in contrast to the meaning of many authors it is not recommendable to use fresh or freeze dried plant samples, because more than half of the sucrose fraction is splitted into glucose and fructose. A discussion of the difficulties involved in the preparation and conservation of the plant matter as well as in the determination of carbohydrates is left out of account. In this respect, reference is made to the literature indicated.
Bestimmung von Kohlenhydraten in Pflanzen
Zusammenfassung Zur Kohlenhydratbestimmung in Pflanzen wird ein für Serienbestimmungen geeignetes papier-chromatographisches Verfahren beschrieben. Im Gegensatz zu anderen Autoren werden luftgetrocknete Proben empfohlen, da bei frischen oder gefriergetrockneten Pflanzen über die Hälfte der Saccharose in Glucose und Fructose gespalten ist. Die Methodik wird eingehend beschrieben, bezüglich der Schwierigkeiten und Probleme der Probenvorbereitung und der Analyse wird auf andere Veröffentlichungen verwiesen.相似文献
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Kha Tram Pushpinder Kanda Bruno J. Salena Shuangyan Huan Yingfu Li 《Angewandte Chemie (Weinheim an der Bergstrasse, Germany)》2014,126(47):13013-13016
Microbial pathogens pose serious threats to public health and safety, and results in millions of illnesses and deaths as well as huge economic losses annually. Laborious and expensive pathogen tests often represent a significant hindrance to implementing effective front‐line preventative care, particularly in resource‐limited regions. Thus, there is a significant need to develop low‐cost and easy‐to‐use methods for pathogen detection. Herein, we present a simple and inexpensive litmus test for bacterial detection. The method takes advantage of a bacteria‐specific RNA‐cleaving DNAzyme probe as the molecular recognition element and the ability of urease to hydrolyze urea and elevate the pH value of the test solution. By coupling urease to the DNAzyme on magnetic beads, the detection of bacteria is translated into a pH increase, which can be readily detected using a litmus dye or pH paper. The simplicity, low cost, and broad adaptability make this litmus test attractive for field applications, particularly in the developing world. 相似文献