How much assistance should be provided to students as they learn with educational technology? Providing help allows students to proceed when struggling, yet can depress their motivation to learn independently. Assistance withholding encourages students to learn for themselves, yet can also lead to frustration. The web-based inquiry-learning program, Voyage to Galapagos (VTG), helps students “fo...

Martin Wolf, chief economics commentator at the Financial Times, is a brilliant journalist and an able economist. Why Globalization Works is an excellent example of the author’s capacity for examination and analysis. The book is based on a series of articles on globalization that originally appeared in the FT, and on his Hayek Memorial Lecture to the Institute of Economic Affairs in London. Wol...

Herein, a series of blue-emitting Ir(III) phosphors is reported based on the cyclometalating N-heterocyclic carbenes (NHCs), in which typical benzimidazolylidene entity now replaced by new 7,9-dihydro-8H-purin-8-ylidene unit. The two extra-nitrogen atoms that are successfully fined turn emission to true-blue region. As proof concept, both experimental measurement and theoretical calculation the...

Irradiation of the gametophytes of Pteridium aquilinum with blue light led to a nearly 5-fold increase in the amino acid-incorporating activity of isolated chloroplasts. The blue light effect was not due to increased synthesis of ATP or other energy donors by the chloroplasts but was probably related to an increased production of chlorophyll and photosynthetic enzymes.

entire lesion was fixed in Bouin's fluid. The specimen was sectioned and stained with hematoxylin and eosin, Bodian's silver impregnation, phosphotungstic acid-hematoxylin, Masson's trichrome, PAS2 -Alcian blue, toluidine blue at pH 2 and pH 4, and Gomori's reticulum stain. This lesion is registered as Specimen RTLA 272 in the Registry of Tumors in Lower Animals, Museum of Natural History, Smit...

The plaque size and hemagglutination characteristics of five cloned wild-type strains of polyomavirus were determined. The strains fell into two groups, those with large or small plaques, each with distinctive hemagglutination behavior at different temperatures and pHs. The nucleotide sequence of VP1, the major capsid protein of the virus, was determined for each of the viral strains. The PTA (...

BACKGROUND Non-Newtonian fluids occur in many relevant flow and mixing scenarios at the lab and industrial scale. The addition of acid or basic solutions to a non-Newtonian fluid is not an infrequent operation, particularly in Biotechnology applications where the pH of Non-Newtonian culture broths is usually regulated using this strategy. METHODOLOGY AND FINDINGS We conducted mixing experimen...