eight sites were sampled during seven rain events to quantify and identify the sources ofpolycyclic aromatic hydrocarbons in urban runoff in the city of tijuana, mexico. the total σ16 pahsconcentration rangedfrom 1113 to 4866 μg/lin the sampled sites and thetotal suspended solid concentrations ranged from 7725 to 4413 μg/l. the high concentrations of total suspended solids were probably the res...

background: we sought to assess right ventricular (rv) systolic and diastolic functions via tissue doppler imaging (tdi) in order to discriminate right-to-left (bidirectional) from left-to-right intracardiac shunts. methods: a tissue doppler velocity study via doppler echocardiography was performed in 20 patients with left-to-right shunt (without evidence of significant pulmonary hypertension) ...

objectives: this study aimed to assess the diagnostic value of conventional and digital radiography for detection of cavitated and non-cavitated proximal caries. materials and methods: fifty extracted human premolars and molars were mounted in a silicone block. charge-coupled device (ccd) and photostimulable phosphor plate (psp) receptors and intra-oral films were exposed with 60 and 70 kvp wit...

introduction radiation protection is an important safety issue for radiographers and patients. the aim of this study was to assess the observance of radiation protection regulations in radiology departments of kermanshah university of medical sciences, kermanshah, iran. materials and methods in total, 48 radiographers and 8 radiography rooms were evaluated in three hospitals of kermanshah, iran...

1. department of pathology, burdwan medical college, burdwan, west bengal, india 2. department of pathology, bankura sammilani medical college, bankura, west bengal, india                   corresponding author: nirmalya chakrabarti, md; tel: (+91) 9477882332 email: [email protected] received: 06 july 2014 accepted: 03 feb. 2015 iran j cancer prev. 2015; 2:129-33.     abstract among...

This study considers the contribution of two ego functions--intelligence and defense mechanisms--to ego developmental level. Two independent assessments of ego level were related to IQ and defense mechanism use in a sample of 89 young adults. Whereas IQ and defense were themselves found to be unrelated, both variables predicted ego level: The relation with IQ was linear, whereas the relation wi...

Although the concept of the defense mechanism was rejected from academic psychology for a number of years, recent empirical studies show renewed interest in defenses. Cognitive psychologists have confirmed the existence of unconscious psychological processes, a requisite for defenses. Developmental, personality, and social psychologists have all found evidence for defense mechanisms that explic...

Recent surge in the development of superhydrophobic/superoleophobic surfaces has been motivated by surfaces like fish scales that have hierarchical structures, which are believed to promote water or oil repellency. In this work, we show that the under-water oil repellency of fish scales is entirely due to the mucus layer formation as part of its defense mechanism, which produces unprecedented c...

The paper deals with the problems of safe solutions railway traffic control systems, using example modern protection systems applied at level crossings. need for reliable, and devices has forced manufacturers in industry to use high quality microprocessors their structures. Devices used safety intersections railroads roadways one shall be absolutely operational reliable. Such are automatic cros...