نتایج جستجو برای: element deposits

تعداد نتایج: 231488  

Journal: :زمین شناسی اقتصادی 0
مصطفی دهقانی احمدآباد سید حسین مجتهدزاده علیرضا یاراحمدی بافقی

determining the promising area for ore deposits is one of the most important steps of prospecting in regional scales. there are many different methods for identifying these areas including geochemical and geophysical methods, remote sensing and sophisticated statistical methods. based on the theory of spatial relations between the dispersion pattern of ore deposits and metallogenic provinces, m...

Journal: :بینا 0
حمید نوروزی h norouzi shahid beheshti university of medical sciences, tehran, iranتهران- خیابان شهید مدنی- بیمارستان امام حسین- بخش چشم حسین محمدربیع h mohammad rabei shahid beheshti university of medical sciences, tehran, iranتهران- خیابان شهید مدنی- بیمارستان امام حسین- بخش چشم علی لشگری a lashgari shahid beheshti university of medical sciences, tehran, iranتهران- خیابان شهید مدنی- بیمارستان امام حسین- بخش چشم

purpose: to report a case of anterior segment eye deposits in a patient on long-term chlorpromazine therapy. case report: a 34 years old man had been on chlorpromazine therapy for 5 years with a total dose of 1,100 gram. since one year ago, he presented with gradual onset of decreased visual acuity in both eyes. slit-lamp examination revealed multiple fine yellow-brown deposits on the corneal e...

Requisite programs soil conservation and sediment control is requires identification of areas prone to erosion and today used fingerprinting method around the world to determine the contribution of sediments transported. In this study, in order to gain optimized share of the estimated sediment resources, used of tracking feature and finally presented the map susceptibility to erosion in the Fas...

Journal: :The Science of the total environment 2013
Joseph R Graney Matthew S Landis

A technique that couples lead (Pb) isotopes and multi-element concentrations with meteorological analysis was used to assess source contributions to precipitation samples at the Bondville, Illinois USA National Trends Network (NTN) site. Precipitation samples collected over a 16month period (July 1994-October 1995) at Bondville were parsed into six unique meteorological flow regimes using a min...

2001
Bart Makaske

Anastomosing rivers constitute an important category of multi-channel rivers on alluvial plains. Most often they seem to Ž . form under relatively low-energetic conditions near a local base level. It appears to be impossible to define anastomosing rivers unambiguously on the basis of channel planform only. Therefore, the following definition, which couples floodplain geomorphology and channel p...

محمدتراب, فرهاد ,

The iron-apatite deposits of the Bafq mining district contain elevated REE content and occur together with vast alterations in country-rock which were formed due to widespread hydrothermal processes in Early Cambrian. Apatite and rare earth element geochemistry as well as radioactive isotope studies of Sm-Nd show that apatite formation might be due to hydrothermal activities and remobilization ...

Journal: :The Journal of Cell Biology 1971
Phyllis M. Novikoff Alex B. Novikoff Nelson Quintana Jean-Jacques Hauw

New insights into the ultrastructure and phosphatase localizations of Golgi apparatus and GERL, and into the probable origin of lysosomes in the neurons of fetal dorsal root ganglia and the small neurons of adult ganglia have come from studying thick (0.5-1.0 micro) as well as thin (up to 500 A) sections by conventional electron microscopy. Tilting the thick specimens, by a goniometer stage, ha...

Journal: :Science 1943
J J Wolford

Rising economic value of a large number of metals as a result of their importance for new technologies and industrial development has renewed worldwide interest for mineral exploration and detailed studies of ore deposits. The Dill’s (2010) “chessboard” classification of mineral deposits is the most recent attempt to provide an exhaustive overview of all mineral deposits known to date. However,...

Journal: :The Annals of occupational hygiene 2010
A Boulet D Rousset E Kauffer

This article describes a device intended to produce replicas on filters by liquid deposition of anion or metal solutions. Schematically, the filters are housed in cassettes labelled automatically by means of a code. An automatic arm takes each cassette, reads the code, and deposits the amount of element required. Weighing before and after deposition allows the amount deposited to be accurately ...

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