The nature of the obscuring material in active galactic nuclei is still uncertain. Although some sources, such as Cygnus A, show evidence for a geometrically thick “torus” as originally suggested, recent work on the radiation-driven warping instability discovered by Pringle suggests that obscuration by thin, warped disks may play a crucial role in AGN.

A careful analysis of the gravitational geon solution found by Brill and Hartle is made. The gravitational wave expansion they used is shown to be consistent and to result in a gauge invariant wave equation. It also results in a gauge invariant effective stress-energy tensor for the gravitational waves provided that a generalized definition of a gauge transformation is used. To leading order th...

Ehab Mohamed Rabei Metwali 1, 2*, Michael Paul Fuller 3, Salah Mohamed Hassan Gowayed 1, 2, Omar Abdel-Hakeim Almaghrabi 1 and Yahia Yosef Mosleh 1, 4 1 Biological Science Department, Faculty of Science, North Jeddah, King Abdul Aziz University, P. O. Box number 11508, Jeddah 21463, Saudi Arabia. 2 Botany Department, Faculty of Agriculture, Suez Canal University, Ismailia 41522, Egypt. 3 Depart...

BACKGROUND Understanding different patterns of fish consumption is an important component for risk assessment of contaminants in fish. A few studies on food consumption had been conducted in Malaysia, but none of them focused specifically on fish consumption. The objectives of this study were to document the meal pattern among three major ethnics in Malaysia with respect to fish/seafood consump...

Waqar Ashraf Department of Natural Sciences, Prince Mohammad Bin Fahad University, Al Khobar 31952, Kingdom of Saudi Arabia ([email protected]) & Atiq Mian Center for Environment & Water, King Fahad University of Petroleum & Minerals, Dhahran 31261, Kingdom of Saudi Arabia Abstract: The levels of total petroleum hydrocarbons (TPH) and lipid contents have been reported for eight commercially im...

Mahseers (Cyprinidae) is one of the most important freshwater fish in Southeast Asia. This being a consumption fish, ornamental and sport fishing. can grow up to more than 30 kg. Therefore, this species called The King River. paper reviewed some aspects interesting fish. A total 54 papers have been where come from our Ichthyos Research Group, Universitas Syiah Kuala. There are 50 mahseer throug...

Mass mortality events are ephemeral phenomena in marine ecosystems resulting from anthropogenically enhanced and natural processes. A fish kill in King Harbor, Redondo Beach, California, USA, in March 2011 killed ~1.54 × 105 kg of fish and garnered international attention as a marine system out of balance. Here, we present data collected prior to, during, and following the event that describe t...

Results of the assessment by-catch in specialized fishery target crab species are presented. The studies covered three fishing areas: off Western Kamchatka (Kamchatka-Kuril and West sub- zones) southeastern coast (Petropavlovsk-Komandorskaya subzone). In addition to object, catches included both non-target crabs representatives other groups animals: fish invertebrates. several genera, most comm...

A procedure for stabilization/solidification of loose waste from the manufacture of Ni and Cd electrodes, which represents a nonutilizable and noncombustible hazardous waste, has been worked out. The procedure comprises solidifying the waste by means of an anionic slow-setting aqueous-asphalt emulsion with subsequent formation of an asphalt coating on the surface of solidified waste by spraying...