منابع مشابه
Brickearth and Clay- With-flints from Kent
ABS~CT Particle-size analyses of brickearth and Clay-with-flints from Kent, England, are presented. A calcareous sample of brickearth is comparable to loess. In th~ clay fraction, there is more illite (or glauconite) than kaolin; and there is some chlorite. The clay fraction of the Clay-withflints consists of smectite, illite and quartz and is probably derived directly from the Chalk. Black san...
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Aging is modulated by environmental and physiological changes, involving genetic pathways that are conserved from yeast cells to mammalian organisms. Notably, Insulin/IGF-like signaling (IIS) contributes to the integrity of the cellular proteome and thus defines the aging process and the onset of age-related diseases. The insulin receptor named DAF-2 in C. elegans or INSR in mammals regulates f...
متن کاملMeasurements of Smoke from Chipped and Unchipped Plots
Smoke data were collected from two instrumented plots located on the Francis Marion National Forest in South Carolina during prescribed burns on Feb. 12, 2003. One of the plots had been subjected to mechanical chipping. Particulate matter (PM2.5) data analyzed by gravimetric methods were collected at nine locations on the downwind sides of each plot. In addition, samplers were hung atop 9-m pol...
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Due to uncertainties of future supplies of pine bark (PB) and peatmoss, ground Pinus taeda logs [pine chips (PC)] were compared to ground PB as a potential container substrate for japanese holly (Ilex crenata Thunb. ‘Chesapeake’), azalea (Rhododendron obtusum Planch. ‘Karen’), and marigold (Tagetes erecta Big. ‘Inca Gold’). Plants were potted in 2.8-L plastic containers 8 Apr. 2004 with either ...
متن کاملIncidence of the pitch canker pathogen and associated insects in intact and chipped Monterey pine branches
In a 2-year study of Monterey pine, Pinus radiata D. Don (Pinaceae), infected with pitch canker, caused by Fusarium circinatum Nirenberg and O'Donnell, less than 2% of symptomatic branches with green foliage were colonized by twig beetles in the genus Pityophthorus Eichhoff (Coleoptera: Scolytidae), whereas approximately 50% of branches with yellow and red foliage were colonized. More Pityophth...
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ژورنال
عنوان ژورنال: Nature
سال: 1880
ISSN: 0028-0836,1476-4687
DOI: 10.1038/022319c0