Spring-summer winds from the south move moist air from the Gulf of Mexico to the Great Plains. Rainfall in the growing season sustains prairie grasses that keep large dunes in the Nebraska Sand Hills immobile. Longitudinal dunes built during the Medieval Warm Period (800 to 1000 years before the present) record the last major period of sand mobility. These dunes are oriented NW-SE and are compo...

http://dx.doi.org/10.1016/j.pocean.2014.07.001 0079-6611/Published by Elsevier Ltd. ⇑ Corresponding author at: National Oceanic and Atmospheric Administration, Pacific Marine Environmental Laboratory, 7600 Sand Point Way NE, Seattle, WA 98115, USA. Tel.: +1 206 526 4809. E-mail address: [email protected] (J.T. Mathis). 1 Co-first authors. 2 Present address: Ocean Conservancy, 1300 19th St....

Soil invertebrates such as ants are thought to be important manipulators of soils in temperate and tropical ecosystems. The fungus gardening ant, Trachymyrmex septentrionalis, is an important agent of biomantling, that is, of depositing soil excavated from below onto the surface, and has been suggested as an agent of bioturbation (moving soil below ground) as well. The amount of bioturbation by...

BACKGROUND Mice exposed to sand fly saliva are protected against vector-transmitted Leishmania major. Although protection has been related to IFN-γ producing T cells, the early inflammatory response orchestrating this outcome has not been defined. METHODOLOGY/PRINCIPAL FINDINGS Mice exposed to uninfected P. duboscqi bites and naïve mice were challenged with L. major-infected flies to characte...

The effects of polyamines (putrescine, spermidine and spermine) on glutathione reductase (glutathione: NADP+ oxidoreductase, EC 1.8.1.7; GR) activity of spinach leaves (Spinacia oleracea L. cv. Gladiator) were investigated under in vivo and in vitro conditions. Spinach was grown in sand culture under controlled conditions for 30 d. In in vivo assays 30-day-old plants were sprayed with polyamine...

AbstrakPenelitian ini memfokuskan pada analisis proses fermentasi menggunakan variasi gula dan air dalam menghasilkan CO2 yang bertujuan untuk mengetahui berapa besar CO 2 terbentuk, saat kondisi apa gas CO2 tersebut dapat diperoleh stabil tingkat sebanyak 800 ml 1000 ml. Proses  dianalasis melalui penambahan tiga yaitu : 200 g, 250 g 300 g. Sampel hasil diambil dianalisis dihasilkan . Has...

Unlike green sand, chemically bonded sand cannot be used again and again without reclamation because in this system, the mixed sand gets it`s strength through chemical reaction which is irreversible in nature. Each sand particle is coated with this reacted chemical, which behaves like an inert element after usage once. This inert coating also called “Dead” binder needs to be removed from the us...