For the first time the entire sequence of the mating behaviour of Antarctic krill (Euphausia superba) in the wild is captured on underwater video. This footage also provides evidence that mating can take place near the seafloor at depths of 400– 700 m. This observation challenges the generally accepted concept of the pelagic lifestyle of krill. The mating behaviour observed most closely resembl...

A variety of living organisms has been found recently that are biochemically able to precipitate the ferromagnetic mineral magnetite (Fe3O4). Originally discovered in the radular teeth of a primitive marine mollusc (Lowenstam, 1962), magnetite has since been reported in bacteria (Frankel, Blakemore & Wolfe, 1979), arthropods (Gould, Kirschvink & Deffeyes, 1978), and vertebrates (Walcott, Gould ...

Difluoromethylornithine (DFMO) is a potent, irreversible inhibitor of ornithine decarboxylase, the ratelimiting enzyme in the synthesis of polyamines that promote cellular proliferation. DFMO has been tested as a potential cancer therapeutic and chemopreventive agent in clinical trials. Reversible hearing loss is a recognized toxicity of DFMO that usually occurs at doses above 2 g/m/d, and gene...

Rodents are subjected to a significant environmental pressure as prey for a large number of carnivore predators. Ultrasonic vocalization is one of the defensive adaptations which minimize the chances of being detected by a predator. Two mechanisms of ultrasound production in the larynx are discussed, with a whistle mechanism being the most probable one. Physical features of ultrasounds, such as...

Accurate measurements of regional to global scale vegetation dynamics (phenology) are required to improve models and understanding of inter-annual variability in terrestrial ecosystem carbon exchange and climate–biosphere interactions. Since the mid-1980s, satellite data have been used to study these processes. In this paper, a new methodology to monitor global vegetation phenology from time se...

Coverage of soft tissue defects of the sole has been one of the major challenges of reconstructive surgery. The sole is a specialized structure, with thick skin and septae in the subcutaneous tissues which make it especially resistant to damage from shear forces and high pressures typical of the sole. Replacement by non-sole skin such as by dorsalis pedis, reverse sural and free flaps will be m...

This chapter discusses the development of a short range acoustic communication channel model and its properties for the design and evaluation of MAC (Medium Access Control) and routing protocols, to support network enabled Autonomous Underwater Vehicles (AUV). The growth of underwater operations has required data communication between various heterogeneous underwater and surface based communica...

Subjects pronounced either the syllable ‘BA’ or ‘GA’ while observing motor acts of hand grasp directed to objects of two sizes (experiment 1). Kinematics of lip aperture and amplitude spectrum of voice were influenced by the observation of the different grasp kinematics depending on the size of the target objects. Specifically, both lip aperture and voice peak amplitude were greater when the ob...

in this study the dissolved air flotation (daf) system in oil refinery was investigated for the treatment of refinery wastewater. in order to investigate sytem a labratory scale rig was built. the aim is to remove some of the wastewater pollutant materials and data modeling of cod test.the effect of several parameters on flotation efficiency namely, saturator pressure, and coagulant dose, on co...

aim: we conducted this study to investigate the role of ramadan fasting on oxidative stress. materials and method: 23 people (16 male, 7 female) aged between 25 and 65 years were recruited in this study. 10cc venous blood samples were taken after 8- to 10- hours fasting on 2 different times: a week before ramadan and at the end of ramadan (day 27). portions of the serum samples were used immedi...