Sustaining K-12 Professional Development in Geology: Recurrent Participation in RockCamp

Researchers surveyed repeat attendees in a geology professional development program known as RockCamp in order to determine the reasons for their sustained involvement in this program. This article describes their findings, which suggest that the teachers' sustained involvement in the RockCamp Program is stimulated by situated learning experiences stressing a compare, contrast, connect, and construct pedagogy within a supportive learning community. Most teachers cited such reasons as efficacy, fun, right time of life, and support, as well as content, friendship, and methodology as reasons for their continued participation in the program. Educational levels: Graduate or professional

Preparation and Characterization of Osmium Complexes For Use in Luminescent Metal Organic Frameworks

Metal-organic frameworks (MOFs) consist of metal ion centers complexed with organic linkers to form an extended three-dimensional, porous structure. These materials have broad applications in separation, small molecule storage, catalysis, and, increasingly, in analytical sensing. In particular, luminescence-based sensing should be possible by preparation of luminescent metal-organic frameworks (LMOFs) whose photophysical properties vary upon changing host-guest interactions. In the current work, LMOFs are prepared from zinc(II) ions and luminescent transition metal complexes: [Os(bpy)2(dcbpy)]Cl2, [Os(phen)2(dcphen)]Cl2, and [Os(CO)2Cl2(dcbpy)]. Systematic alterations were made to the ligands of the luminescent transition metal complexes in order to discern the impact on the photoluminescence of the complexes and the LMOFs. The excitation and emission spectra are reported for the transition metal complex in solution and solid state and compared to those obtained for the LMOF. Insights gained will be applied in the development of sensors for analyte-specific sensors of environmental or clinical interest

Münchner Theatergeschichte 1600 bis 2000

Tagungsbericht: Münchner Theatergeschichte 1600 bis 2000 Veranstalter: Kulturreferat der Landeshauptstadt München; Institut für Theaterwissenschaft; Institut für Bayerische Geschichte an der Ludwig-Maximilians-Universität München Datum, Ort: 12.05.2000-14.05.2000, Münche

Biosynthesis of prostaglandins

Highly purified cyclooxygenase from sheep vesicular glands is stimulated by the presence of protoporphyrin IX compounds. This stimulation may be due to the conversion of an apoenzyme to the holoenzyme, and full activity is achieved when half of the enzyme subunits (70,000 daltons) bind heme. Also, one‐half of the subunits appear to contain non‐heme iron. The apparent molecular weight of the holoenzyme is approximately 300,000 daltons and is compatible with a complex of four 70,000 dalton subunits. Thus, we suggest that heme and non‐heme iron may be attached to different 70,000 daltons subunits that make up an A2B2‐type of peptide chain arrangement.Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/141216/1/lipd0591.pd