The cosmic ray elemental abundances of 30Zn, 31Ga, 32Ge, and 34Se provide important tests of the model of the OB-association origin of galactic cosmic rays that has resulted from previous ACE measurements of the neon and iron isotopes and which appears to be confirmed by elemental abundances of Zn, Ga, Ge, and Se measured by the balloon-borne Trans-Iron Galactic Element Recorder (TIGER). These ...

The microstructure and mechanical properties of materials saturate to steady states after severe plastic deformation (SPD). Despite the well-known effect temperature on steady-state microstructure, there is no general agreement significance strain rate applicability Zener-Hollomon parameter in this regard. In study, several pure metals (aluminum, copper, titanium, iron) a Cu–30Zn (wt%) brass al...

This work deals with atmospheric corrosion to assess the degrading effects of air pollutants on ferrous and non-ferrous metals and alloys, which are mostly used as engineering materials. An exposure study was conducted in the Tuticorin port area located on the east coast of South India, in the Gulf of Mannar with Sri Lanka to the southeast. Common engineering materials, namely mild steel, galva...

secondary clarifiers with large areas are widely applied in wastewater treatment plants. a pilot study was conducted to examine the possibility of applying one and two-stage inclined tube settlers instead of conventional secondary clarifiers. tube diameter in the first stage of the two-stage settler was wide as the conventional ones, but in the second stage, it was narrow to improve the efficie...

abstract background: the children with middle ear effusion need repeated re-tympanostomies. adenoidectomy is an effective surgical intervention in the management of chronic otitis media with effusion in conjunction with in-sertion of tympanostomy tubes (tts). to find out whether tts in different positions decrease the rate of re-tympanostomies study was done. methods: the present study retrospe...

background:   objective: the aim of this study was to evaluate the expression of enos in the fts of women with tep.   materials and methods: in this case-control study, a total number of 30fts samples were obtained from three groups including: 10 fts of women that bearing an ep, 10 fts from the non-pregnant women at luteal phase of the menstrual cycle, and 10 fts of healthy pregnant women (n=10...