Algae study

Kinetic Studies of H9O7 Decay. In the presence of all the types of algae studied, the decomposition of hydrogen peroxide was first-order with respect to peroxide. As the typical results in Figure 2 Illustrate, the catalysis was heterogeneous catalysts released by the algae into bulk solution were not involved. 

There are a number of reasons why the human red cell data are less tractable than those for plant cells. In the first place, the cells in question come from a species which is almost certainly more highly evolved than the primitive algae studied by Collander the membranes of the human red cell contain numerous specialised transport systems. The data on specialised systems should be set apart from the remaining data if the interaction between solute structure and simple diffusion properties of the membrane is to be investigated. Excellent evidence exists that the uptake of glycerol into human red cells occurs by a specialised system [1,14] which... 

Dichlobenil, another benzonitrile herbicide, had no effect on any of the algae studied by Cullimore (1975) except Hormidium barlowi and H. flaccidum. These were 50% inhibited by one to two ppm of the herbicide. 

The product quaUty considerations for nonphotosynthetic microorganisms are similar to those for algae. Tables 6 and 7 present composition and amino acid analyses, respectively, for selected bacteria, yeasts, molds, and higher fungi produced on a large pilot-plant or commercial scale. Table 8 summarizes results of proteia quaUty and digestibiUty studies. 

The effect of pyrogaHol on algae has also been studied (27). Acute toxicity data include oral LD q (rat) = 789 mg/kg, intraperitoneal LD3Q (mouse) = 400 mg/kg, and oral LD q (rabbit) = 1600 mg/kg (28). 

A month-long study of the effects of ultraviolet radiation (UV) on phytoplankton and ice-algae collected from Arthur Harbor, Anvers Island, Antarctica, was carried out during November-December 1987. The parameters studied included primary production rates, photosynthetic... 

Monomethyltirf. Acute toxicity studies were identified for monomethyltin for algae, invertebrates, and fish. Chronic NOECs were available for algae and invertebrates. A chronic NOEC of 0.007 mg/1 for monomethyltin chloride in Scenedesmus subspica-tus was the lowest reported result. Since there were no long-term test results available for fish, it was necessary to apply an uncertainty factor of 50 to the critical study. 

Dioctyltirv. Acute toxicity studies were identified for dioctyltin for invertebrates and fish. Chronic NOECs were available for algae and invertebrates. 

Morton International, Inc. (1996a) Acute toxicity of monomethyl-tin trichloride to the marine alga, Skeletonema costatum. Study conducted by T.R. Wllbury Laboratories, Inc., Marblehead, MA,... 

Ward TJ, Kowalski PL, Boeri RL (1995a) Acute toxicity of the water accommodated fraction (WAF) of aikyitin MA to the freshwater alga, Selenastrum capricornutum. Marblehead, MA, T.R. Wilbury Laboratories, Inc. (Study No. 865-MO). 

---