Potato notes     

Alonzo G. Allen  Seymour Bridge  Thos McKeary  Nelson S. Pratt. 《American Journal of Potato Research》1923,1(1):5-5

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High frequency ventilation of the lungs: A Review     

Christopher J. Seymour 《Veterinary anaesthesia and analgesia》1986,14(1):169-176

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An adverse reaction to intravenously administered marbofloxacin in a dog during general anaesthesia          下载免费PDF全文

Thaleia‐Rengina Stathopoulou  Christopher J Seymour 《Veterinary anaesthesia and analgesia》2015,42(3):341-342

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Blood oxygen transport and hemoglobin function in three tropical fish species from northern Australian freshwater billabongs     

R.M.G. Wells  J. Baldwin  R.S. Seymour  R.E. Weber 《Fish physiology and biochemistry》1997,16(3):247-258

The oxygen binding properties of whole blood and hemoglobin were studied in three phylogenetically distant tropical teleosts inhabiting freshwater billabongs that exhibit marked seasonal oxygen stratification. The water breathing saratoga (Scleropages jardinii, Family Osteoglossidae), derived from an ancient divergence of the stem line leading to all other extant teleosts, has a low blood oxygen carrying capacity, Bohr and Root effect, and a high blood oxygen affinity. Erythrocytes contain a single major hemoglobin component, and equimolar concentrations of ATP and GTP. The tarpon (Megalops cyprinoides, Family Megalopidae), a facultative air-breather, has the highest blood oxygen carrying capacity and Bohr effect, and a low blood oxygen affinity and Root effect. Erythrocytes contain a single major hemoglobin and ATP as a putative regulator of hemoglobin oxygen affinity. Barramundi (Lates calcarifer, Family Centropomidae), is an obligate water-breather with intermediate blood oxygen binding properties, and the smallest Root effect. Erythrocytes contain at least 7 hemoglobins, and equimolar concentrations of ATP and GTP. Functional properties of these three blood oxygen transport systems are considered in terms of the respiratory environment and demand for oxygen. Our interpretation supports the hypothesis that the process of speciation can lead to divergence in physiological mechanisms, irrespective of past or present selection pressures.  相似文献   

Lethal Effect of X-Rays on Marine Microplankton Organisms     

Bonham K  Seymour AH  Donaldson LR  Welander AD 《Science (New York, N.Y.)》1947,106(2750):245-246

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Termite mounds mitigate against 50 years of herbivore-induced reduction of functional diversity of savanna woody plants     

Grant S. Joseph  Milton Makumbe  Colleen L. Seymour  Graeme S. Cumming  Zacheus Mahlangu  David H. M. Cumming 《Landscape Ecology》2015,30(10):2161-2174

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When fear is near: threat imminence elicits prefrontal-periaqueductal gray shifts in humans     

Mobbs D  Petrovic P  Marchant JL  Hassabis D  Weiskopf N  Seymour B  Dolan RJ  Frith CD 《Science (New York, N.Y.)》2007,317(5841):1079-1083

Humans, like other animals, alter their behavior depending on whether a threat is close or distant. We investigated spatial imminence of threat by developing an active avoidance paradigm in which volunteers were pursued through a maze by a virtual predator endowed with an ability to chase, capture, and inflict pain. Using functional magnetic resonance imaging, we found that as the virtual predator grew closer, brain activity shifted from the ventromedial prefrontal cortex to the periaqueductal gray. This shift showed maximal expression when a high degree of pain was anticipated. Moreover, imminence-driven periaqueductal gray activity correlated with increased subjective degree of dread and decreased confidence of escape. Our findings cast light on the neural dynamics of threat anticipation and have implications for the neurobiology of human anxiety-related disorders.  相似文献   

Plasma observations near jupiter: initial results from voyager 1     

Bridge HS  Belcher JW  Lazarus AJ  Sullivan JD  McNutt RL  Bagenal F  Scudder JD  Sittler EC  Siscoe GL  Vasyliunas VM  Goertz CK  Yeates CM 《Science (New York, N.Y.)》1979,204(4396):987-991

Extensive measurements of low-energy positive ions and electrons were made throughout the Jupiter encounter of Voyager 1. The bow shock and magneto-pause were crossed several times at distances consistent with variations in the upstream solar wind pressure measured on Voyager 2. During the inbound pass, the number density increased by six orders of magnitude between the innermost magnetopause crossing at approximately 47 Jupiter radii and near closest approach at approximately 5 Jupiter radii; the plasma flow during this period was predominately in the direction of corotation. Marked increases in number density were observed twice per planetary rotation, near the magnetic equator. Jupiterward of the Io plasma torus, a cold, corotating plasma was observed and the energylcharge spectra show well-resolved, heavy-ion peaks at mass-to-charge ratios A/Z* = 8, 16, 32, and 64.  相似文献   

Plasma observations near jupiter: initial results from voyager 2     

Bridge HS  Belcher JW  Lazarus AJ  Sullivan JD  Bagenal F  McNutt RL  Ogilvie KW  Scudder JD  Sittler EC  Vasyliunas VM  Goertz CK 《Science (New York, N.Y.)》1979,206(4421):972-976

The first of at least nine bow shock crossings observed on the inbound pass of Voyager 2 occurred at 98.8 Jupiter radii (R(J)) with final entry into the magnetosphere at 62 R(J). On both the inbound and outbound passes the plasma showed a tendency to move in the direction of corotation, as was observed on the inbound pass of Voyager 1. Positive ion densities and electron intensities observed by Voyager 2 are comparable within a factor of 2 to those seen by Voyager 1 at the same radial distance from Jupiter; the composition of the magnetospheric plasma is again dominated by heavy ions with a ratio of mass density relative to hydrogen of about 100/1. A series of dropouts of plasma intensity near Ganymede may be related to a complex interaction between Ganymede and the magnetospheric plasma. From the planetary spin modulation of the intensity of plasma electrons it is inferred that the plasma sheet is centered at the dipole magnetic equator out to a distance of 40 to 50 R(J) and deviates from it toward the rotational equator at larger distances. The longitudinal excursion of the plasma sheet lags behind the rotating dipole by a phase angle that increases with increasing radial distance.  相似文献   

Observations at venus encounter by the plasma science experiment on mariner 10     

Bridge HS  Lazarus AJ  Scudder JD  Ogilvie KW  Hartle RE  Asbridge JR  Bame SJ  Feldman WC  Siscoe GL 《Science (New York, N.Y.)》1974,183(4131):1293-1296

Preliminary results from the rearward-looking electrostatic analyzer of the plasma science experiment during the Mariner 10 encounter with Venus are described. They show that the solar-wind interaction with the planet probably involves a bow shock rather than an extended exosphere, but that this is not a thin boundary at the point where it was crossed by Mariner 10. An observed reduction in the flux of electrons with energies greater than 100 electron volts is interpreted as evidence for somne direct interaction with the exosphere. Unusual intermittent features observed downstream of the planet indicate the presence of a comet-like tail hundreds of scale lengths in length.  相似文献