Optimal response of the sperm of Allomyces from the highly male strain M16 to the chemotactic agent, sirenin, was shown to occur when the sperm suspension contained 2 mm piparazine-N', N-bis[2-ethane sulfonic acid] buffer, 3 mm CaCl(2), and chelated trace elements. For the male strain M3, the CaCl(2) needed was 3.5 mm with the other two components the same as for M16. The inclusion in the sperm...

  Various recent studies in both human and laboratory animals have indicated an influential role of glucose and phosphate in embryonic development of different strains and species in various media. So this study was initiated to investigate the effects of different concentrations of glucose (G0=0, Gl=0.2, G2=5.5 mM) in the absence (P0) and presence (P1=0.39 mM) of inorganic phosphate, designate...

background: caffeine increases the camp production that stimulates spermatozoa movement. caffeine is also used for induction of in vitro acrosome reaction in mammalian spermatozoa, an important step in achieving fertilization. objective: the aim of this study was to assess the effect of caffeine on sperm's motility, vitality and laboratory fertilization rates in mouse in two t6 and m16 media. m...

Little is known about how genetic variation affects the capacity for exercise to change body composition. We examined the extent to which voluntary exercise alters body composition in several lines of selectively bred mice compared to controls. Lines studied included high runner (HR) (selected for high wheel running), M16 (selected for rapid weight gain), Institute of Cancer Research (ICR) (ran...

We present high-resolution spectroscopy and images of a photodissociation region (PDR) in M16 obtained during commissioning of the near-infrared spectrometer (NIRSPEC) on the Keck II telescope. PDRs play a significant role in regulating star formation, and M16 offers the opportunity to examine the physical processes of a PDR in detail. We simultaneously observe both the molecular and ionized ph...