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Gravitational waves from coalescing neutron stars encode information about nuclear matter at extreme densities, inaccessible by laboratory experiments. The late inspiral is influenced by the presence of tides, which depend on the neutron star equation of state. Neutron star mergers are expected to often produce rapidly rotating remnant neutron stars that emit gravitational waves. These will provide clues to the extremely hot post-merger environment. This signature of nuclear matter in gravitational waves contains most information in the 2–4 kHz frequency band, which is outside of the most sensitive band of current detectors. We present the design concept and science case for a Neutron Star Extreme Matter Observatory (NEMO): a gravitational-wave interferometer optimised to study nuclear physics with merging neutron stars. The concept uses high-circulating laser power, quantum squeezing, and a detector topology specifically designed to achieve the high-frequency sensitivity necessary to probe nuclear matter using gravitational waves. Above 1 kHz, the proposed strain sensitivity is comparable to full third-generation detectors at a fraction of the cost. Such sensitivity changes expected event rates for detection of post-merger remnants from approximately one per few decades with two A+ detectors to a few per year and potentially allow for the first gravitational-wave observations of supernovae, isolated neutron stars, and other exotica.
An experiment was conducted to evaluate the erythrocyte glutamate-oxaloacetate transaminase activity coefficient (EGOT-Ac) as a biochemical indicator of vitamin B-6 status and to document clinical effects of a B-6 deficiency in mature swine. A 12% crude protein diet, formulated with cornstarch and an isolated soy protein, was analyzed to contain .24 ppm B-6. Sixty-one gilts, initially averaging 111 kg, were individually fed 1.9 kg daily of a diet providing .45, 1.8, or 90 mg B-6/d (treatments (Trt) 1, 2 and 3, respectively). In addition, another group of gilts was fed 90 mg B-6 for the initial 57 d then switched to the diet providing .45 mg B-6 for the remainder of the experiment (Trt 4). On d 0, 57 and 121 animals from each Trt were killed and samples of the semitendinosus (ST) and semimembranosus (SM) were collected. Following a 24-h chill, the entire SM and ST were dissected from the carcass and weighed Blood was sampled on d 0 and monthly thereafter. The EGOTAc was determined by measuring the glutamate-oxaloacetate transaminase (GOT) activity in isolated, hemolized erythrocytes with and without pyridoxal phosphate added to the reaction mixture.
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