On-site and in situ remediation technologies applicable to petroleum hydrocarbon contaminated sites in the Antarctic and Arctic

Danielle Camenzuli,

Benjamin L. Freidman

Published: Sept. 7, 2015

Petroleum hydrocarbon contaminated sites, associated with the contemporary and legacy effects of human activities, remain a serious environmental problem in the Antarctic and Arctic. The management of contaminated sites in these regions is often confounded by the logistical, environmental, legislative and financial challenges associated with operating in polar environments. In response to the need for efficient and safe methods for managing contaminated sites, several technologies have been adapted for on-site or in situ application in these regions. This article reviews six technologies which are currently being adapted or developed for the remediation of petroleum hydrocarbon contaminated sites in the Antarctic …

Hop-on, hop-off: the first record of the alien species crescent-marked lily aphid (Neomyzus circumflexus) (Insecta, Hemiptera, Aphididae) in Greenland

Karina Wieczorek,

Dominik Chłond

Published: May 8, 2020

We report for the first time the presence of the globally distributed and extremely polyphagous pest species—the crescent-marked lily aphid (or mottled arum aphid) (Neomyzus circumflexus L.) (Insecta, Hemiptera, Aphididae)—in Greenland. This species, of alien origin, was found on the ornamental plant Salix arbuscula L., imported from Denmark and sold in the main supermarket of Nuuk, the capital of Greenland. As this species is not the preferred host plant of N. circumflexus, the possibility must be considered that the aphids were not imported along with S. arbuscula from the mainland but were transferred from other imported ornamental plants sold in …

Об учебных пособиях при изучении истории России

Брикнер Александр Густавович

Published: Jan. 1, 1876

Успех преподавания каждой науки значительно обусловливается степенью развития метода, общепринятых и оказавшихся целесообразными практических приемов; чем более развиты метод и приемы преподавания любой науки, тем легче могут быть пополняемы пробелы в отношении к пособиям, учебникам по данному предмету; с другой стороны,—чем богаче и лучше устроен прибор преподавания (Lehrapparat) какой-либо науки, тем легче и тем успешнее профессора при университетском преподавании решают сложную и трудную - задачу сообщения своим слушателям главного содержания науки и существенных правил для занятий ею.