Microchemical Reactions

The Survival of Leptospira (spirochæta) Icterohæmorrhagiæ in Nature; Observations concerning Microchemical Reactions and Intermediary Hosts

1. Leptospira icterohaemorrhagiae is unable to grow in the urine, either with or without the addition of suitable culture ingredients, the acidity of the urine being detrimental to the growth. It survives less than 24 hours, unless the urine is neutralized or slightly alkalized, when the period of survival is somewhat longer. If suitable nutrient ingredients are added to the neutralized or slig...

Microchemical Color Reactions as an Aid to the Identification and Classification of Brain Tumors.

fraction of the corresponding mean frequency. For the different individuals the amount of deviation is about the same. The critical termal increment, ,u, is in this case 12,200 calories. This agrees quantitatively with the increment for a number of other activities among arthropods' in which "nerve center" activity may be presumed to be the determining phenomenon. Our purpose now, however, is n...

Microchemical identification of amidone.

Microchemical analytical techniques of potential clinical interest.

Microchemical techniques with the capability of single-cell analysis will become increasingly important in clinical laboratory practice. One of the current moves underway in this direction is determination of enzyme activities of cells by microscale spectrophotometry and spectrophotofluorometry for prenatal diagnosis of inherited enzyme deficiencies. Three less-common microanalytical techniques...

Microchemical identification of gamma-hydroxybutyrate (GHB)

A new microcrystal test for the detection of gamma-hydroxybutyrate (GHB) is described. The silver/copper reagent consists of an aqueous solution of 0.1 g of cupric nitrate and 0.1 g of silver nitrate in 10.0 mL water. While some crystals form upon evaporation of the reagent, the test forms distinctive crystals for GHB and does not form crystals with some commonly encountered controlled substanc...