A new status for Penstemon cyananthus Hook. ssp. subglaber Pennell (Scrophulariaceae)

Penstemon cyanathus Hook. ssp. subglaber Pennell, a plant found frequently in northwestern Utah, southeastern Idaho, and southeastern Wyoming, is elevated to species status. A new name, Penstemon holmgrenii Clark is proposed because P. subglaber is preoccupied.     

First record of pygmy rabbits ( Brachylagus idahoensis ) in Wyoming

Pygmy rabbits are reported for the first time in southwestern Wyoming. The range for this species is thus extended 240 km and 145 km from the nearest records in Idaho and Utah, respectively.     

Notes on Viscainopelmatus davewerneri (Orthoptera: Gryllacrididae; Stenopelmatinae) from the Viscaino Desert, Baja California Sur, Mexico

A male nymph in stadium 3 of Viscainopelmatus davewerneri Tinkham is reported and illustrated. The specimen was taken near Laguna Scammon, Baja California Sur, Mexico.     

Geographical review of the historical and current status of Ospreys ( Pandion haliaetus ) in Utah

A small numbers of Ospreys ( Pandion haliaetus ) are known to have nested historically in Utah. A precise baseline figure is unavailable, but the 19th-century Osprey population in Utah probably consisted of at least 15 breeding pairs scattered in 4 geographic regions. Human persecution is believed to have caused the abandonment of nesting territories along the Wasatch Front and in the western Uinta Mountains by 1900 and 1960, respectively. Osprey populations in the southern plateaus and Green River areas, however, began increasing in the late 1970s. Several recent nesting attempts and numerous summer sightings at nontraditional and abandoned historical sites in Utah suggest the Osprey is also expanding its range in Utah. High productivity for local pairs and long-range dispersal from more northerly Osprey populations are discussed as sources for the current surge in Utah's Osprey population, which now consists of approximately 35 breeding pairs.     

绿色化学——化学工业走向可持续发展和具有竞争力的有效途径

绿色化学是化学工业走向可持续发展和具有竞争性的有效途径,并日益为政府、工业界及公众接受为社会、经济及环境发展的必要目标.本文对绿色化学的概念、进展及实践作了评介.     

天文大气折射与映射函数的数值模拟

为了研究天文大气折射与中性大气折射延迟之间的内在联系,利用天文大气折射表的表列数据对大气折射延迟的映射函数进行了数值模拟.计算结果表明,用天文大气折射测定值模拟映射函数是可行的;同时也表明,映射函数的形式是次要的,随着连分式项数的增加可以提高模拟的精度.该结论对于改善大气折射数据处理的归算精度,降低仪器的观测截止角,和提高仪器的使用效应具有一定的参考价值和指导意义.     

Failure of SV40-transformed lizard cells to induce tumors in autogeneic or allogeneic hosts

Summary Lizard cells from the tails of geckos were readily morphologically and antigenically transformed in vitro by SV40 virus. Neither autografts of these cells nor allografts of SV40 transformed gecko embryo cells produced tumors in animals under observation from 1 to 3 years.