Charles W. Merideth

Charles W. Merideth is shown at an event in the Atrium Building at City Tech. Charles W. Merideth was the sixth president of the City Tech. He was formerly installed on October 19, 1990. Before coming to City Tech, Merideth had a long career in science and higher education. Under Merideth, the College expanded the number of baccalaureate programs offered by the College.

Charles W. Merideth in Atrium Building

Charles W. Merideth is pictured with three others in the Atrium Building at City Tech. Charles W. Merideth was the sixth president of the City Tech. He was formerly installed on October 19, 1990. Before coming to City Tech, Merideth had a long career in science and higher education. Under Merideth, the College expanded the number of baccalaureate programs offered by the College.

Charles W. Merideth at City Tech event

Charles W. Merideth is shown looking at pictures in a group at an event in the Atrium Building at City Tech. Charles W. Merideth was the sixth president of the City Tech. He was formerly installed on October 19, 1990. Before coming to City Tech, Merideth had a long career in science and higher education. Under Merideth, the College expanded the number of baccalaureate programs offered by the College.

Charles W. Merideth at a Multi-Cultural Week Event

Charles W. Merideth is pictured at the "Asia at a Glance"exhibit. The exhibit was a part of the May 1991 Multi-Cultural Week at City Tech. Charles W. Merideth was the sixth president of the City Tech. He was formerly installed on October 19, 1990. Before coming to City Tech, Merideth had a long career in science and higher education. Under Merideth, the College expanded the number of baccalaureate programs offered by the College.

Charles W. Merideth at Commencement Ceremony

Charles W. Merideth, sixth president of City Tech, is shown at one of the College's commencement ceremonies. The date of the ceremony is unkown. Charles W. Merideth was the sixth president of the City Tech. He was formerly installed on October 19, 1990. Before coming to City Tech, Merideth had a long career in science and higher education. Under Merideth, the College expanded the number of baccalaureate programs offered by the College.

Charles W. Merideth at Commencement Ceremony

Charles W. Merideth is shown in graduation regalia at a commencement ceremony for the New York City Technical College. The date of the ceremony is unknown. Charles W. Merideth was the sixth president of the City Tech. He was formerly installed on October 19, 1990. Before coming to City Tech, Merideth had a long career in science and higher education. Under Merideth, the College expanded the number of baccalaureate programs offered by the College.

Charles W. Merideth

Portrait of Charles W. Merideth, president 1990-1996. Charles W. Merideth was the sixth president of the City Tech. He was formerly installed on October 19, 1990. Before coming to City Tech, Merideth had a long career in science and higher education. Under Merideth, the College expanded the number of baccalaureate programs offered by the College.

Invertebrate D2 type dopamine receptor exhibits age-based plasticity of expression in the mushroom bodies of the honeybee brain

We have isolated a cDNA clone from the honeybee brain encoding a dopamine receptor, AmDop2, which is positively coupled to adenylyl cyclase. The transmembrane domains of this receptor are 88% identical to the orthologous Drosophila D2 dopamine receptor, DmDop2, though phylogenetic analysis and sequence homology both indicate that invertebrate and vertebrate D2 receptors are quite distinct. In situ hybridization to mRNA in whole-mount preparations of honeybee brains reveals gene expression in the mushroom bodies, a primary site of associative learning. Furthermore, two anatomically distinct cell types in the mushroom bodies exhibit differential regulation of AmDop2 expression. In all nonreproductive females (worker caste) and reproductive males (drones) the receptor gene is strongly and constitutively expressed in all mushroom body interneurons with small cell bodies. In contrast, the large cell-bodied interneurons exhibit dramatic plasticity of AmDop2 gene expression. In newly emerged worker bees (cell-cleaning specialists) and newly emerged drones, no AmDop2 transcript is observed in the large interneurons whereas this transcript is abundant in these cells in the oldest worker bees (resource foragers) and older drones. Differentiation of the mushroom body interneurons into two distinct classes (i.e., plastic or nonplastic with respect to AmDop2 gene expression) indicates that this receptor contributes to the differential regulation of distinct neural circuits. Moreover, the plasticity of expression observed in the large cells implicates this receptor in the behavioral maturation of the bee.

Total and individual carotenoid profiles in Solanum phureja of cultivated potatoes: I. Concentrations and relationships as determined by spectrophotometry and HPLC

Total and individual carotenoid concentrations were determined by spectro photometry and HPLC, in raw tubers of a sample of 23 accessions of Solanum phureja potatoes taken at random from the world germplasm collection following its stratification on tuber flesh color. Lutein, zeaxanthin, violaxanthin, antheraxanthin and beta-carotene were detected in all accessions and three distinct patterns of carotenoid accumulation were evidenced by cluster analysis. Accessions in group 1 showed the highest concentrations of total carotenoids (1258-1840 mu g 100 g(-1) FW) comprised largely of zeaxanthin (658-1290 mu g 100 g(-1) FW) with very low or no presence of beta-carotene (below 5.4 mu g 100 g(-1) FW). Accessions in group 2 presented moderate total carotenoid concentrations with violaxanthin, antheraxanthin, lutein and zeaxanthin as the major carotenoids. Accessions in group 3 showed low concentrations of total carotenoids (97-262 mu g 100 g(-1) FW) and very low or no zeaxanthin, with lutein and violaxanthin as the predominant carotenoids and relatively high concentrations of beta-carotene(up to 27 mu g 100 g(-1) FW). Five accessions with significant concentrations of zeaxanthin were identified with the accession 703566 showing the highest concentration (1290 p g 100 g(-1) FW). This value is to our knowledge higher than any value previously reported for potatoes, including those achieved through genetic modification. For the 23 S. phureja accessions, total carotenoid concentration was positively and significantly correlated with antheraxanthin and zeaxanthin concentrations, and negatively and significantly correlated with beta-carotene concentration. (C) 2008 Elsevier B.V. All rights reserved.