abstract in this study, p critical level for corn plant (zea mays l.) was determined using pbc in 25 combined soils samples from different fields of east azerbaijan province. to calculate the pbc, current soil p test methods such olsen,colwel, soltanpur and schowab, kelna2 and iron impregnated strips as a quantity factor (q) and the methods of soluble p measurements such as distilled water, cal...

Anne Marijn van der Graaf, Nina D. Paauw, Tsjitske J. Toering, Martin Feelisch, Marijke M. Faas, 3 Thomas R. Sutton, Magdalena Minnion, Joop. D. Lefrandt, Sicco A. Scherjon, Arie Franx, Gerjan 4 Navis, A. Titia Lely 5 1 Department of Pathology and Medical Biology, Division of Medical Biology, University of Groningen, University Medical 6 Center Groningen, the Netherlands; 2 Department of Obstet...

IT was claimed by Davy as early as 1862 that the haemoglobin in the blood of the earthworm has a respiratory function, but subsequent studies have given conflicting results. In the more recent investigations advantage has been taken of the fact that haemoglobin has a greater affinity for carbon monoxide than for oxygen; the oxygen consumption of normal worms is compared with that of worms whose...

1. Patandin S, Dagnelie PC, Mulder PGH, Op de Coul E, van der Veen JE, Weisgias-Kuperus N, Sauer PJJ. Dietary exposure to polychlorinated biphenyls and dioxins from infancy until adulthood: a comparison between breast-feeding, toddler and long-term exposure. Environ Health Perspect 107:45-51 (1999). 2. Duarte-Davidson R, Jones KC. Polychlorinated biphenyls (PCBs) in the UK population: estimated...

In this study, the relationship among four species of Polygonum (including P. hyrcanicum (three samples), P. persicaria, P. avicular, and P. hydropiper) was investigated by GC profiling. Furthermore, the major compounds of the ethylic ether extract of P. hyrcanicum were identified by GC/MS as: α-bisabolol (17.5%), cedrol (15.9%), sesquisabinene hydra...