Municipal green waste as substrate for the microbial production of platform chemicals

In Germany alone, more than 5·10$^6$ tons of municipal green waste is produced each year. So far, this material is not used in an economically worthwhile way. In this work, grass clippings and tree pruning as examples of municipal green waste were utilized as feedstock for the microbial production of platform chemicals. A pretreatment procedure depending on the moisture and lignin content of the biomass was developed. The suitability of grass press juice and enzymatic hydrolysate of lignocellulosic biomass pretreated with an organosolv process as fermentation medium or medium supplement for the cultivation of Saccharomyces cerevisiae, Lactobacillus delbrueckii subsp. lactis, Ustilago maydis, and Clostridium acetobutylicum was demonstrated. Product concentrations of 9.4 g$_{ethanol}$ L$^{−1}$, 16.9 g$_{lactic}$ acid L$^{−1}$, 20.0 g$_{itaconic acid}$ L$^{−1}$, and 15.5 g$_{solvents}$ L$^{−1}$ were achieved in the different processes. Yields were in the same range as or higher than those of reference processes grown in established standard media. By reducing the waste arising in cities and using municipal green waste as feedstock to produce platform chemicals, this work contributes to the UN sustainability goals and supports the transition toward a circular bioeconomy

Discovery of palladium, antimony, tellurium, iodine, and xenon isotopes

Currently, thirty-eight palladium, thirty-eight antimony, thirty-nine tellurium, thirty-eight iodine, and forty xenon isotopes have been observed and the discovery of these isotopes is discussed here. For each isotope a brief synopsis of the first refereed publication, including the production and identification method, is presented.Comment: to be published in At. Data Nucl. Data Table

Principles of direct-current machines

xvii, 363 p. ; 22 cm

The development of a thermally activated, continuously sensitive cloud chamber, and its use in nuclear physics research

Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 1937.Vita.Includes bibliographical references (leaves 146-150).by Alexander Suss Langsdorf, Jr.Ph.D

Principles of direct-current machines

xvii+363hlm.;21c

Theory of alternating-current machinery

xix+666hlm.;21c

Theory of Alternating Current Machinery

21 cm; 666 ha

Principles of Direct - Current Machines

23 cm; 363 ha

Principles of direct current machines,

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