True crabs (Brachyura) are the most successful group of decapod crustaceans. This success is most likely coupled to their life history, including two specialised larval forms, zoea and megalopa. The group is comparably young, starting to diversify only about 100 million years ago (mya), with a dramatic increase in species richness beginning approximately 50 mya. Early evolution of crabs is stil...

The acronym CRAB summarizes the most typical clinical manifestations of multiple myeloma, these being hypercalcemia, renal failure, anemia, and bone disease. CRAB can be used to distinguish between active, symptomatic multiple myeloma and monoclonal gammopathy of undermined significance or smoldering myeloma. The distinction is relevant not only for classification and diagnosis but also for the...

The level of the heavy metal in green tiger shrimp (Penaeus semisulcatus) and crab (Portunus pelagicus) caught off the Persian Gulf near Bushehr province were investigated. This study was performed to evaluate instrumental neutron activation analysis (INAA) to analyze heavy metal concentration in crab and shrimp whole body tissue. The order of the swimmer crab and shrimp heavy metal concentrati...

The various four-fermion production channels in e + e ? annihilation are discussed and the CC11 process e + e ? ! f u 1 f d 1 f u 2 f d 2 , f6 =e, is studied in detail. The cross section d 2 =ds 1 ds 2 , with s 1 ; s 2 being the invariant masses squared of the two fermion pairs, may be expressed by six generic functions. All but one may be found in the literature. The cross section, including i...

North Carolina’s Blue Crab Fishery As North Carolina’s number one fishery, blue crabs, Callinectes sapidus, are part of an important industry for numerous coastal communities. The fishery supports commercial fishermen, dealers, gear providers and processors throughout the year. Fluctuations in landings have led to concerns over crab populations and the livelihood of the commercial crabbers they...

The land crab Gecarcinus quadratus is an engineering species that controls nutrient cycling in tropical forests. Factors regulating their coastal distribution are not fully understood. We quantified land crab distribution during the dry season at Sirena Field Station in Corcovado National Park, Costa Rica, and found that land crab burrow density decreases with increasing distance from the ocean...

It is prefered to make a larger crossing angle to avoid parasitic collisions between beams in LHC. The transverselongitudinal aspect ratio of the LHC beam is 17 μm/7.5 cm=0.23 × 10−3. Crossing angle larger than the aspect ratio causes geometrical degradation of luminosity. Crab cavity can realizes head-on collision without crossing angle effectively, with the result that it recovers these lumin...

We analyze the Crab pulsar at ten frequencies from 0.43 to 8.8 GHz using data obtained at the Arecibo Observatory and report the spectral dependence of all pulse components and the rate of occurrence of large-amplitude ‘giant’ pulses. Giant pulses occur only in the main-and-interpulse components that are manifest from radio frequencies to gamma-ray energies (known as the ‘P1’ and ‘P2’ component...

Die-offs of cordgrass are pervasive throughout western Atlantic salt marshes, yet understanding of the mechanisms precipitating these events is limited. We tested whether herbivory by the native crab, Sesarma reticulatum, is generating die-offs of cordgrass that are currently occurring on Cape Cod, Massachusetts (U.S.A.), by manipulating crab access to cordgrass transplanted into die-off areas ...

We construct for the first time, the sequences of stable neutron star (NS) models capable of explaining simultaneously, the glitch healing parameters, Q, of both the pulsars, the Crab (Q ≥ 0.7) and the Vela (Q ≤ 0.2), on the basis of starquake mechanism of glitch generation. These models yield an upper bound on surface redshift of NSs, zR ≃ 0.77. If the lower limit of the observational constrai...