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Bilir O.,Recep Tayyip Erdogan University
The American journal of emergency medicine | Year: 2013

Bee stings are commonly encountered worldwide. Various manifestations after a bee sting have been described. Local reactions are common. Unusually, manifestations such as vomiting, diarrhea, dyspnea, generalized edema, acute renal failure, hypotension, and collapse may occur. Rarely, vasculitis, serum sickness, neuritis, and encephalitis have been described, which generally develop days to weeks after a sting. We report a case of a 35-year-old man who developed neurologic deficit 6 hours after a bee sting, which was confirmed to be left parietooccipital infarction on magnetic resonance imaging scan. We report this case due to its rarity. Source


In this study, 20-year-old residential buildings which have reinforcement bar corrosion in their basement columns were investigated in Rize, Turkey. The reason for the occurrence of high steel corrosion in only some certain parts of the reinforcement of the columns in the basements was examined. The effect of concrete capillarity on chloride transport and reinforcement corrosion was analyzed. During the study process, the compressive strength, unit weight, sorption and absorption values of the concrete from core specimens taken from three buildings were measured and a loss in the diameters of corroded bars was detected. The chloride content of concrete columns and of the water entering the basements was calculated. It was identified that sea sand was used in the concrete of these buildings, and the buildings were affected by the water entering into the basements. It was expected that water with low chloride content entering the basements would decrease the amount of chloride content in the concrete with diffusion. However, it was observed that the amount of chloride content actually decreased at the parts of concrete which had direct contact with the low chloride content water while it increased at the capillary region. In fact, nearly three times more chloride than the chloride content used during the production of concrete was accumulated in some parts of the capillary region. The chloride accumulated in the capillary region of concrete when the slope of tangent (dh/dt) of capillary function (h(t)=k √t), decreases below 0.08 × 10 -6. A correlation technique was proposed to predict the narrow region where chloride is accumulated in concrete. If the narrow width of chloride accumulation and reinforcement corrosion of the construction elements is known in advance, precautions can be taken against reinforcement corrosion by decreasing the amount of chloride content in this part of the concrete. © 2011 Elsevier Ltd. All rights reserved. Source


This study investigated the effects of black locust (Robinia pseudoacacia L.) plantations on surface soil properties in eroded sand loam (SL) soils. Two land use types were selected in the semi-humid region of Artvin, Turkey: a black locust plantation area (BLP) and an adjacenn1n-managed site (NMS) (control site). The study used a randomized complete block design with four replications in both experimental sites. Four disturbed and four undisturbed soil samples were randomly collected at a soil depth of 0-10 and 10-20cm in each site. When compared to Non-Managed (NMS) Site, the soil bulk density (Db) decreased from 1.35 to 1.25gcm -3, permanent wilting point (PWP) decreased from 11.50 to 9.20 (% vol.), soil penetration resistance (SPR) decreased from 1.55 to 1.20MPa; while total porosity (St) increased from 43.28 to 47.92 (%), soil organic matter (SOM) increased from 0.88 to 1.95 (%), P 2O 5 increased from 8.50 to 12.77ppm, Ca increased from 18.07 to 21.90 (me/100gr) at 0 to 10cm soil depth in black locust plantation (BLP) site. Total porosity (St), field capacity (FC), plant available water (PAW), saturated hydraulic conductivity (Ksat), soil organic matter (%), soil organic carbon (%), total nitrogen (T-N), P 2O 5, Ca, Mg, and K were found to be significantly greater at the BLP site when compared to the control site; while bulk density (Db), permanent wilting point (PWP), soil penetration resistance (SPR) were found to be significantly lower at a soil depth of 0 to 10cm. Mean St, plant available water (PAW), saturated hydraulic conductivity (Ksat), soil organic matter (SOM), soil organic carbon (SOC), total nitrogen, P 2O 5 and Ca were found to decrease significantly; while clay, Db and SPR were found to increase significantly with soil depth at both the NMS and BLP sites. The highest carbon sequestration was measured at a soil depth of 0-10cm in the BLP site. The black locust plantation (BLP) had a positive impact on surface soil properties and carbon sequestration in eroded lower hillslopes in the semi-humid region of Coruh Drainage Basin (CDB) in Turkey. The planting of black locust might be useful in soil reclamation projects in this type of eroded sites in semi-humid regions. © 2011 Elsevier B.V. Source


Karasu S.,Recep Tayyip Erdogan University
Energy | Year: 2010

Most of the developed countries in the world use Daylight Saving Time (DST) as an energy conservation method. This study focuses on the effects of DST on electrical lighting in the buildings in Turkey. Turkey might adjust its daylight saving time to decrease energy consumption. For this purpose, five scenarios are considered and compared to status quo. The scenario with a 30-minute forward shift to single DST from April to October, stands out as the best solution to conserve electricity across the entire country. The results of the study show that maximum saving is obtained in this scenario by at least 0.7% on the consumption of lighting electricity. © 2010 Elsevier Ltd. Source


The objective of this study was to evaluate insecticide resistance related to acetylcholinesterase (AChE) sensitivity and annual changes in An. maculipennis from six different populations. Larvae and adult samples of An. maculipennis were collected from six different localities (Birecik, Beysehir, Cankiri, Avariz, Tatarkoy, Derekoy) in Turkey. Insecticide susceptibility against malathion and propoxur was determined. AChE and insensitive AChE levels were measured individually. All Anopheles maculipennis population mortality rates were placed in the suspected resistance category for malathion and propoxur in 2007. While Thrace region populations (Avariz, Tatarkoy, Derekoy) were placed in the surveillance category in 2008, the Birecik, Beysehir, and Cankiri populations were identified in the resistance category. According to the biochemical assay, AChE inhibition rates were high in 2007 and decreased in 2008, except in Derekoy. Our results revealed that insecticide resistance against malathion and propoxur increased from 2007 to 2008. Biochemical assay results showed that the AChE insensitivity for 2 test years and insensitive AChE frequency had increased annually. Our results also showed that extensive usage of organophosphate and carbamate for pest control in agriculture is a key factor for malathion and propoxur resistance in all tested populations rather than direct usage of mosquito control. Source

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