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► Two manta ray species were reciprocally monophyletic for n DNA RAG1 and paraphyletic for mt DNA ND5.► The estimated divergence time was less than 0.5 Ma with an upper confidence limit of within 1 Ma.This opinion has been upheld by numerous court rulings.Later in his career, Gates pursued a number of philanthropic endeavors.They found that people who had most of their daily exposure to moderately bright light in the morning had a lower body mass index (BMI) than those who had most of their light exposure later in the day.When our body clocks are synchronised with the day we feel less hungry and our bodies use energy more efficiently, says the study author Phyllis Zee, a professor of neurology at Northwestern University, Illinois.

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Two practical considerations regarding MBR technologies are their cost and interchangeability.While obtaining unambiguous information on capital costs is challenging, the technical specifications of the commercial i MBR (immersed membrane bioreactor) membrane module products allow an assessment of both the module footprint, and thus their interchangeability, and the membrane aeration demand, which provides the greatest contribution to the running costs.It is envisaged that there exists a range of optimum values of the i MBR module dimensions that are likely to relate to key design operation and maintenance parameters such as specific aeration demand of the membrane and aeration protocol, gross flux, physical and chemical cleaning protocols, sludge retention time, and pre-treatment.Developing and commercially available membrane bioreactor (MBR) membrane module products can be classified according to the membrane configuration.Products based on flat sheet (FS), hollow fiber (HF), and multitube (MT) configurations are described.