ASASSN-15lu is a Type Ia Supernova

We report spectroscopic classification of ASASSN-15lu (ATel #7698) in SDSS J132112.88+401556.7 (z=0.035037, via NED) through inspection of an optical spectrum (range 370-680 nm, resolution 0.8 nm), obtained with the 2.3-m Bok telescope (+ Boller & Chivens spectrograph) at Kitt Peak on 2015 June 24.2 UT

ASASSN-15lo is a Post-Maximum Normal Type Ia Supernova

We report spectroscopic classification of ASASSN-15lo (ATel #7673) through inspection of a low-dispersion optical spectrum (range 370-680 nm), obtained with the 2.3-m Bok telescope (+ Boller & Chivens spectrograph) at Kitt Peak on 2015 June 20 U

PSN J11473508+5558147 is a Type Ib Supernova Near Maximum Light

We report spectroscopic classification of PSN J11473508+5558147 through inspection of a low-dispersion optical spectrum (range 370-680 nm), obtained with the 2.3-m Bok telescope (+ Boller & Chivens spectrograph) at Kitt Peak on 2015 June 21 UT

Metabolic precursors of surfactant disaturated-phosphatidylcholine in preterms with respiratory distress

Our objective was to study the metabolic precursors of surfactant disaturated-phosphatidylcholine (DSPC) in preterm infants with respiratory distress syndrome (RDS) on mechanical ventilation. We performed 46 DSPC kinetic studies in 23 preterms on fat-free parenteral nutrition and mechanical ventilation (birth weight = 1167 ± 451 g, gestational age = 28.5 ± 2.0 weeks). Eight infants received a simultaneous intravenous infusion of U13C-glucose and [16,16,16]2H-palmitate, eight infants received U13C-glucose and 2H2O, and seven received U13C-palmitate and 2H2O. Surfactant DSPC kinetics were calculated from the isotopic enrichments of DSPC-palmitate from sequential tracheal aspirates and its metabolic precursors in plasma or urine. DSPC fractional synthesis rate (FSR) was 17 ± 11, 21 ± 16, and 15 ± 6%/day from glucose, palmitate, and body water, respectively (P = 0.36). DSPC-FSR from U13C-glucose and 2H2O were significantly correlated and yielded similar estimates (difference of –0.1 ± 3%) (P = 0.91). The difference in the 15 infants receiving palmitate versus 2H2O or palmitate versus glucose was +6.0 ± 12%/day (P = 0.21). There was a significant correlation between DSPC-FSRs from plasma glucose and plasma FFA. The contribution of glucose versus palmitate to DSPC-FSR was 49 ± 20% versus 51 ± 20%, respectively. Plasma glucose and FFA showed similar contributions to DSPC-FSR in infants with RDS and fat-free parenteral nutrition. FSRs from 2H2O or glucose were highly correlated