Experimental measurement of efficiency and transport coherence of a cold atom Brownian motor in optical lattices

The rectification of noise into directed movement or useful energy is utilized by many different systems. The peculiar nature of the energy source and conceptual differences between such Brownian motor systems makes a characterization of the performance far from straightforward. In this work, where the Brownian motor consists of atoms interacting with dissipative optical lattices, we adopt existing theory and present experimental measurements for both the efficiency and the transport coherence. We achieve up to 0.3% for the efficiency and 0.01 for the P\'eclet number

Pyometra in Bitches Induces Elevated Plasma Endotoxin and Prostaglandin F(2α )Metabolite Levels

Endotoxemia in bitches with pyometra can cause severe systemic effects directly or via the release of inflammatory mediators. Plasma endotoxin concentrations were measured in ten bitches suffering from pyometra with moderately to severely deteriorated general condition, and in nine bitches admitted to surgery for non-infectious reasons. Endotoxin samples were taken on five occasions before, during and after surgery. In addition, urine and uterine bacteriology was performed and hematological, blood biochemical parameters, prostaglandin F(2α )metabolite 15-ketodihydro-PGF(2α )(PG-metabolite), progesterone and oestradiol (E(2)-17β) levels were analysed. The results confirm significantly increased plasma levels of endotoxin in bitches with pyometra and support previous reports of endotoxin involvement in the pathogenesis of the disease. Plasma concentrations of PG-metabolite were elevated in pyometra bitches and provide a good indicator of endotoxin release since the concentrations were significantly correlated to the endotoxin levels and many other hematological and chemistry parameters. The γ-globulin serum protein electrophoresis fraction and analysis of PG-metabolite can be valuable in the diagnosis of endotoxin involvement if a reliable, rapid and cost-effective test for PG-metabolite analysis becomes readily available in the future. Treatment inhibiting prostaglandin biosynthesis and related compounds could be beneficial for bitches suffering from pyometra

Fertilization in Broadcast-Spawning Corals of the Flower Garden Banks National Marine Sanctuary

Broadcast spawning is considered to be the dominant reproductive strategy for reef corals, but little is known about two critical postspawning processes, fertilization and early larval development. Instead, most efforts have focused on dispersal and recruitment. Since 1993, we have examined coral fertilization and development at the Flower Garden Banks, which contain two isolated reefs with predictable and dramatic annual mass spawning events in the northwestern Gulf of Mexico. Observations of in vitro fertilization indicate that the hermaphroditic scleractinian species Colpophyllia natans, Diploria strigosa, Monfastraea faveolata, and M. franksi all have high fertilization potentials when outcrossing. However, although D. strigosa can self-fertilize readily, self-fertilization levels within C. natans and the Montastraea species are low. In addition, interspecific crossing attempts among the hermaphroditic species of Montastraea (M. franksi, M. faveolata, and M. annularis) yielded low levels of fertilization. The differences observed in the timing of spawning and the low hybridization success between the Montastraea siblings lend additional support to their recent reclassification as separate species. Spawned egg samples collected immediately upon release from female colonies of the gonochoric species M. cavernosa and Stephanocoenia intersepta produced an unexpected observation—very high levels of fertilization. This suggests internal fertilization prior to egg release, a process that has not heretofore been observed in a broadcast-spawning scleractinian

Timing, Species Participation, and Environmental Factors Influencing Annual Mass Spawning at the Flower Garden Banks (Northwest Gulf of Mexico)

Since 1990, highly predictable and intense annual mass spawning events have been witnessed at the Flower Garden Banks (northwestern Gulf of Mexico), and more recently at several other western Atlantic coral reefs as well. The annual reproductive period at the Flower Gardens coincided with the summer seawater temperature maximum and occurred between the seventh and 10th evenings following a full moon in August or September. Species-specific peaks of activity were centered on the eighth and 10th evenings. Coral spawning at the Flower Gardens began within 1 hr of sunset and continued for roughly 4 hr. On the eighth evening, coral species observed spawning during the first 2.5 hr were Diploria strigosa, Montastraea cavernosa, and M. franksi. Other reef-dwelling invertebrate species were also consistently seen spawning during this time. Montastraea annularis, M. faveolata, and Stephanocoenia intersepta spawned about 1 hr later, following a brief transition period during which little spawning activity was observed. The 10th evening was characterized by the successive spawning of Colpophyllia natans (early evening) and S. intersepta (late evening). Male colonies of the gonochoric species M. cavernosa and S. intersepta typically began spawning up to 30 min before females, although several individuals of M. cavernosa have been observed spawning more than 3 hr before females

Library Services: Impact Analysis Spring 2018 to Fall 2018

Libraries are an essential element of learning on university campuses. The content housed within libraries supports academic exploration and growth. Physically, libraries are designed to provide access to materials and spaces that facilitate learning. This report explored the impact of student library resource use on student persistence to the next term. Students\u27 library resource use was captured with EZ Proxy log-ins and library material check-outs. Students who had a record of using library resources were compared to similar students who did not have a record of library resource use. They were compared using prediction-based propensity score matching. Students who used library resources were matched with non-users based on their persistence prediction and their propensity to participate. Students were 98% similar following matching. Participating and com­parison students were compared using difference-in-difference testing. Those who accessed library resources were significantly more likely to persist at USU than similar students who did not use library resources (DID = 0.017, p \u3c .001). The unstandardized effect size can be estimated through student impact. It is estimated that library resources assisted in retaining 278 (CI: 168 – 387) students each year who were otherwise not expected to persist

Cardiac troponin I levels in canine pyometra

BACKGROUND: Myocardial injury may contribute to unexpected deaths due to pyometra. To detect myocardial damage, measurement of cardiac troponin I (cTnI) is currently the most sensitive and specific method. The aims of the present study were to evaluate presence of myocardial damage in canine pyometra by analysis of cTnI, to explore whether myocardial injury was associated with systemic inflammatory response syndrome (SIRS) and to evaluate whether other clinical or laboratory parameters were associated with cTnI increase. METHODS: Preoperative plasma levels of cTnI were investigated in 58 female dogs with pyometra and 9 controls. The value of physical examination findings, haematological, serum biochemical and pro-inflammatory (CRP and TNF-α) parameters as possible predictors of increased cTnI levels was also evaluated. RESULTS: Seven dogs with pyometra (12%) and one control dog (11%) had increased levels of cTnI. In the pyometra group, the levels ranged between 0.3–0.9 μg l(-1 )and in the control dog the level was 0.3 μg l(-1). The cTnI levels did not differ significantly between the two groups. No cardiac abnormalities were evident on preoperative physical examinations. Four of the pyometra patients died within two weeks of surgery, of which two were examined post mortem. In one of these cases (later diagnosed with myocarditis and disseminated bacterial infection) the cTnI levels increased from 0.9 μg l(-1 )preoperatively to 180 μg l(-1 )the following day when also heart arrhythmia was also detected. The other patient had cTnI levels of 0.7 μg l(-1 )with no detectable heart pathology post mortem. CTnI increase was not associated with presence of SIRS. There was a trend for the association of cTnI increase with increased mortality. No preoperative physical examination findings and few but unspecific laboratory parameters were associated with increased cTnI levels. CONCLUSION: Increased cTnI levels were observed in 12% of the dogs with pyometra. The proportions of dogs with cTnI increase did not differ significantly in the pyometra group compared with the control group. CTnI increase was not associated with presence of SIRS. A trend for association of cTnI increase and mortality was observed. Preoperative physical examination findings and included laboratory parameters were poor predictors of increased cTnI levels

Blood lactate levels in 31 female dogs with pyometra

<p>Abstract</p> <p>Background</p> <p>Canine pyometra is a life-threatening disease common in countries where spaying of dogs is not routinely performed. The disease is associated with endotoxemia, sepsis, systemic inflammatory response syndrome (SIRS) and a 3–4% mortality rate. Blood lactate analysis is clinically valuable in predicting prognosis and survival, evaluating tissue perfusion and treatment response in human and veterinary critical care settings. The aims of the present study were to investigate 1) the blood lactate levels of female dogs with pyometra by a hand-held analyser and 2) if these levels are related with the clinical status or other biochemical or hematological disorders.</p> <p>Methods</p> <p>In total 31 female dogs with pyometra admitted for surgical ovariohysterectomy and 16 healthy female control dogs were included in the present study. A complete physical examination including SIRS-status determination was performed. Blood samples for lactate concentrations, hematological and biochemical parameters, acid-base and blood gas analysis and other laboratory parameters were collected and subsequently analysed. The diagnosis pyometra was verified with histopathological examination of the uterus and ovaries. Increased hospitalisation length and presence of SIRS were used as indicators of outcome.</p> <p>Results</p> <p>In the pyometra group the median blood lactate level was 1,6 mmol l^-1(range <0.8–2.7 mmol l^-1). In the control group the median lactate level was 1,2 mmol l^-1(range <0.8–2.1 mmol l^-1). Of the 31 bitches 19 (61%) fulfilled 2 or more criteria for SIRS at inclusion, 10 bitches (32%) fulfilled 3 of the SIRS criteria whereas none accomplished more than 3 criteria. Lactate levels did not differ significantly between the pyometra and control group, or between the SIRS positive and SIRS negative dogs with pyometra. Increased lactate concentration (>2.5 mmol l^-1) was demonstrated in one female dog with pyometra (3%), and was not associated with longer hospitalisation or presence of SIRS. Lactate measurement was not indicative of peritonitis. None of the bitches died during or within two months of the hospital stay. The measurements of temperature, heart rate, respiratory rate, percentage bandforms of neutrophilic granulocytes, α₂-globulins, creatinin, pvCO₂, TCO₂and base excess showed significant differences between the SIRS positive and the SIRS negative pyometra cases.</p> <p>Conclusion</p> <p>Increased blood lactate concentrations were demonstrated in 3% (1/31), and SIRS was present in 61% (19/31) of the female dogs with pyometra. Preoperative lactate levels were not related with presence of SIRS or prolonged hospitalisation. Lactate measurement was not indicative of peritonitis. The value of a single and repeated lactate analysis in more severely affected cases remains to be determined.</p

Systematic Analysis of Double-Ionization Dynamics Based on Four-Body Dalitz Plots

We report on an experimental and theoretical systematic study of double ionization of helium by ion impact in terms of four-particle Dalitz plots. Several collision systems covering abroad range of perturbation parameters η (projectile charge to speed ratio) were investigated. With increasing η we observe a systematic trend from features, characteristic to correlated double-ionization mechanisms, to signatures of higher-order processes not requiring electron-electron correlations [the mechanism called two-step-two projectile-electron interaction (TS-2)]. The data for the largest η can qualitatively be amazingly well described by a simple model only including the TS-2 mechanism