نتایج جستجو برای: mesozoic refractory sand

تعداد نتایج: 88414  

Journal: :Annals of the Missouri Botanical Garden 1992

Journal: :iranian journal of child neurology 0
farhad mahvelati-shamsabadi assistant professor of pediatric neurology, pediatric neurology research center, shahid beheshti university of medical sciences, tehran, iran mohammad ghofrani professor of pediatric neurology pediatric neurology research center, shahid beheshti university of medical sciences, tehran, iran mohammad mehdi nasehi assistant professor of pediatric, mazandarn university of medical sciences, sari, iran eznallah azarghashb assistant professor of statistic,shahid beheshti university of medical sciences, tehran, iran

objective neuropsychological impairment is an important co-morbidity of chronic epilepsy. the aim of this study was to determine the state of the cognitive and motor development of patients with refractory epilepsy. materials & methods  we studied 150 consecutive children with epilepsy who were referred to mofid children hospital, a third level public referral university hospital in tehran, ira...

Journal: :iranian journal of child neurology 0
f. ashrafzadeh md professor of pediatric neurology,mashhad university of medical sciences h. rakhshandeh md mashhad university of medical sciences e. mahmodi md professor of pediatric neurology,mashhad university of medical sciences

objective several investigations have demonstrated that rosa damascena has an inhibitory effect on the hypothalamus and on pituitary system reactivity in the rat; it has also been shown that the essential oil of rosa damascena has significant antiepileptic effects on pentylentetrazole (ptz) induced seizures in rats. we aimed at assessing the effects of the essential oil of rosa damascena when u...

2009
Y. Donnadieu Y. Goddéris

In this contribution, we continue our exploration of the factors defining the Mesozoic climatic history. We improve the Earth system model GEOCLIM designed for long term climate and geochemical reconstructions by adding the explicit calculation of the biome dynamics using the LPJ model. The coupled GEOCLIM-LPJ model thus allows the simultaneous calculation of the climate with a 2-D spatial reso...

2017
Masayuki Ikeda Ryuji Tada Kazumi Ozaki

The global silica cycle is an important component of the long-term climate system, yet its controlling factors are largely uncertain due to poorly constrained proxy records. Here we present a ∼70 Myr-long record of early Mesozoic biogenic silica (BSi) flux from radiolarian chert in Japan. Average low-mid-latitude BSi burial flux in the superocean Panthalassa is ∼90% of that of the modern global...

2011
Ahmed Elsheikh Mohamed G. Abdelsalam Kevin Mickus

The recent delineation of a vastly expanded Holocene paleo-lake (the Northern Darfur Megalake which was originally mapped as the West Nubian Paleolake and here will be referred to as WNPL–NDML) in Darfur in northwestern Sudan has renewed hopes for the presence of an appreciable groundwater resource in this hyper-arid region of Eastern Sahara. This paleolake which existed within a closed basin p...

Journal: :Annals and Magazine of Natural History 1884

2008
Yongsheng Liu Shan Gao Peter B. Kelemen Wenliang Xu

We explore Fe/Mn and Nb/Ta ratios of basalts as potential tracers for differentiating melts of recycled mafic crustal lithologies from peridotitic melts. Trace elements and Fe/Mn ratios of the Mesozoic and Cenozoic basalts from East China were analyzed by ICP-MS. Low Nb/Ta ratios (15.4 ± 0.3 (2r, n = 45)), high Nb and Ta contents (60.1 and 4.01 ppm) and high Fe/ Mn ratios (64.7 ± 1.5 (2r, n = 4...

Journal: :Environmental science & technology 2005
Robert G Qualls

Dissolved organic matter leached from decomposing organic matter is important in the leaching of nutrients from the root zone of ecosystems, eluviation of metals, and transport of hydrophobic pollutants. The objective of this study was to compare microbial mineralization rates in intact soil cores of various fractions of water-soluble dissolved organic matter. Uniformly 14C-labeled Populus frem...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید