Deserts: Can they be the potential suppliers of bioavailable iron?

GEOPHYSICAL RESERCH LETTERS VOL. 29, NO. 11に収録されている原

Laparoscopically Treated Giant Gastric Bezoar Complicated with Large Ulcer in Young Patient

Gastric bezoars are rare but well known intraluminal formations in the gastrointestinal system. Reports for gastric bezoar treatment include dissolution, endoscopic retrieval and surgery (open and laparoscopic). We are presenting a case of 32 years old male patient presented with giant gastric bezoar complicated with large ulcer. The patient was operated laparoscopically with success. Laparoscopic surgery is safe alternative to open surgery for giant gastric bezoars treatment

The role of atmospheric deposition in the biogeochemistry of the Mediterranean Sea

Estimates of atmospheric inputs to the Mediterranean (MED) and some coastal areas are reviewed, and uncertainities in these estimates considered. Both the magnitude and the mineralogical composition of atmospheric dust inputs indicate that eolian deposition is an important (50%) or prevailing (>80%) contribution to sediments in the offshore waters of the entire Mediterranean (MED) basin. Model data for trace metals and nutrients indicate that the atmosphere delivers more than half the lead and nitrogen, one-third of total phosphorus, and 10% of the zinc entering the entire basin. Measured data in sub-basins, such as the north-western MED and northern Adriatic indicate an even greater proportion of atmospheric versus riverine inputs. When dissolved fluxes are compared (the form most likely to impinge on surface water biogeochemical cycles), the atmosphere is found to be 5 to 50 times more important than rivers for dissolved Zn and 15 to 30 times more important for Pb fluxes. Neglecting co-limitation by other nutrients, new production supported by atmospheric nitrogen deposition ranges from 2-4 g C m-2 yr-1, whereas atmospheric phosphorus deposition appears to support less than 1 g C m-2 yr-1. In spite of the apparently small contribution of atmospheric deposition to overall production in the basin it has been suggested that certain episodes of phytoplankton blooms are triggered by atmospheric deposition of N, P or Fe. Future studies are needed to clarify the extent and causal links between these episodic blooms and atmospheric/oceanographic forcing functions. A scientific program aimed at elucidating the possible biogeochemical effects of Saharan outbreaks in the MED through direct sampling of the ocean and atmosphere before and after such events is therefore highly recommended

Organic Farming by Using Different Desert Soiles; Could it be an Alternative to Fertilizers?

Abstract It is shown that Saharan soil has the potential of producing bioavailable iron when illuminated with visible light and also it contains some essential macronutrient and micronutrient elements. In this study, these properties of the desert soil were tested on the certified wheat cultivars (Triticum aestivum L. var. gonen 98) using Hewitt nutrient solution, illuminated and non-illuminated soil solutions from Sahran desert and Ankara city and Zabol. Deionized water was used as a control solution. Wheat cultivar, displayed comparable results when grown in illuminated Saharan dust solutions and Hewitt solution. Results showed that dust from Saharan desert could act as a source of natural fertilizer under specific conditions and could be utilized in "true" organic farming