335 research outputs found
Control of Sawtoothed Grain Beetles (Coleoptera: Silvanidae) in Stored Oats by Using an Entomopathogenic Fungus in Conjunction with Seed Resistance
We tested the hypothesis that the entomopathogenic fungus Beauveria bassiana would be more efficacious on oat cultivars that prolonged the immature developmental period of sawtoothed grain beetle, Oryzaephilus surinamensis (L.), a storage pest. However, percentage of reduction in progeny production was similar on whole \u27Don\u27 and \u27Paul\u27 oats treated with fungus, even though immature developmental time was longer on whole \u27Don\u27 than on \u27Paul\u27 oats. In our initial test at 10 mg of conidia per kilogram of oats, the number of beetle progeny produced was reduced by 38-67% in whole oats, and there was no effect of the fungus on insects developing on cracked oats. Therefore, we conducted two dose-response studies that showed that adding 150 mg of conidia per kilogram to cracked or whole \u27Paul\u27 oats resulted in a 70 and 98% reduction, respectively, in number of progeny produced. No further reduction was obtained by adding 200 mg of conidia per kilogram of cracked or whole \u27Paul\u27 oats. Presence of the fungus did not affect developmental time in any of our tests. A previous study showed that cleaned oats should limit insect population growth to allow long-term storage of oats without insect damage. However, the current study shows that if the oats are not cleaned, and not cleaning oats is the normal storage practice, then B. bassiana could be used to help control sawtoothed grain beetles
U.S. GLOBEC Georges Bank long-term moored program : part 1 - mooring configuration
As part of the U.S. GLOBEC Northwest Atlantic/Georges Bank program, moorings were deployed on Georges
Bank as part of the broad-scale survey component to help measure the temporal variability of both physical
and biological characteristics on the Bank. The array consisted of a primary mooring site on the Southern
Flank which was maintained for the full 5-year duration of the field program, plus secondary moorings, with
fewer sensors and of shorter duration, in the well-mixed water on the Crest and in the cod/haddock
spawning region on the Northeast Peak. Temperature and conductivity (salinity) were measured at 5-m
intervals, ADCP velocity profiles were obtained with 1-m vertical resolution, and bio-optical packages
(measuring fluorescence, optical transmission and photosynthetically active radiation) were deployed at
10-m and 40-m depths. Bottom pressure was measured at the Southern Flank site. The buoy design, sensors
and mooring configuration is presented and discussed below, and the data obtained is presented and
discussed in an accompanying reports “U.S. GLOBEC Georges Bank Long-Term Moored Program: Part 2 –
Yearly Data Summary and Report,” and “U.S. GLOBEC Georges Bank Long-Term Moored Program: Part 3 –
Data Summary.”Funding was provided by the National Science Foundation under grant numbers
OCE-93-13670, OCE-96-32348, OCE98-06379, OCE-98-06445 and OCE-02-27679
WHOI Hawaii Ocean Timeseries Station (WHOTS) : WHOTS-3 mooring turnaround cruise report
The Woods Hole Oceanographic Institution (WHOI) Hawaii Ocean Timeseries (HOT) Site (WHOTS), 100 km north of Oahu, Hawaii,
is intended to provide long-term, high-quality air-sea fluxes as a coordinated part of the HOT program and contribute to the goals of
observing heat, fresh water, and chemical fluxes at a site representative of the oligotrophic North Pacific Ocean. The approach is to
maintain a surface mooring outfitted for meteorological and oceanographic measurements at a site near 22.75N 158W by successive
mooring turnarounds. These observations will be used to investigate air-sea interaction processes related to climate variability.
The first WHOTS mooring (WHOTS-1) was deployed in August 2004. WHOTS-1 was recovered and WHOTS-2 deployed in July 2005.
This report documents recovery of the WHOTS-2 mooring and deployment of the third mooring (WHOTS-3) at the same site. Both
moorings used Surlyn foam buoys as the surface element and were outfitted with two Air-Sea Interaction Meteorology (ASIMET)
systems. Each system measures, records, and transmits via Argos satellite, the surface meteorological variables necessary to compute
air-sea fluxes of heat, moisture, and momentum. WHOTS-2 was equipped with one Iridium data transmitter, and WHOTS-3 had two
Iridium data transmitters. In cooperation with R. Lukas of the University of Hawaii, the upper 155 m of the morrings were outfitted with
oceanographic sensors for the measurement of temperature, conductivity, and velocity.
The WHOTS mooring turnaround was done on the Scripps Institution of Oceanography ship Revelle, Cruise AMAT-07, by the Upper
Ocean Processes Group of the Woods Hole Oceanographic Institution and Roger Lukas’group at the University of Hawaii. The cruise took
place between 22 and 29 June 2006. Operations on site were initiated with an intercomparison of shipboard meteorological observations
with the WHOTS-2 buoy. Dr. Frank Bradley, CSIRO, Australia, assisted with these comparisons. This was followed by recovery of the
WHOTS-2 mooring on 24 June. A number of recovered instruments were calibrated by attaching them to the rosette frame of the CTD.
Shallow CTD profiles were taken every two hours for 12 hours on the 25th of June. A fish trap was deployed on June 25th by John Yeh, a
University of Hawaii graduate student. The WHOTS-3 mooring was deployed on 26 June at approximately 22°46'N, 157°54'W in 4703 m
of water. A ship-buoy intercomparison period and series of shallow CTDs followed along with a second deployment of the fishtrap.
A NOAA Teacher-At-Sea, Diana Griffiths, and a NOAA Hollings Scholar, Terry Smith, participated in the cruise. This report describes
the mooring operations, some of the pre-cruise buoy preparations and CTD casts taken during the cruise, the fish trap deployments, and
the experiences of the Teacher-at-Sea and Hollings Scholar.Funding was provided by the National Oceanic and Atmospheric Administration under grant No. NA17RJ1223
for the Cooperative Institute for Climate and Ocean Research (CICOR)
Iatrogenic Spinal Cord Injury Resulting From Cervical Spine Surgery.
STUDY DESIGN: Retrospective cohort study of prospectively collected data.
OBJECTIVE: To examine the incidence of iatrogenic spinal cord injury following elective cervical spine surgery.
METHODS: A retrospective multicenter case series study involving 21 high-volume surgical centers from the AOSpine North America Clinical Research Network was conducted. Medical records for 17 625 patients who received cervical spine surgery (levels from C2 to C7) between January 1, 2005, and December 31, 2011, were reviewed to identify occurrence of iatrogenic spinal cord injury.
RESULTS: In total, 3 cases of iatrogenic spinal cord injury following cervical spine surgery were identified. Institutional incidence rates ranged from 0.0% to 0.24%. Of the 3 patients with quadriplegia, one underwent anterior-only surgery with 2-level cervical corpectomy, one underwent anterior surgery with corpectomy in addition to posterior surgery, and one underwent posterior decompression and fusion surgery alone. One patient had complete neurologic recovery, one partially recovered, and one did not recover motor function.
CONCLUSION: Iatrogenic spinal cord injury following cervical spine surgery is a rare and devastating adverse event. No standard protocol exists that can guarantee prevention of this complication, and there is a lack of consensus regarding evaluation and treatment when it does occur. Emergent imaging with magnetic resonance imaging or computed tomography myelography to evaluate for compressive etiology or malpositioned instrumentation and avoidance of hypotension should be performed in cases of intraoperative and postoperative spinal cord injury
Epidural Hematoma Following Cervical Spine Surgery.
STUDY DESIGN: A multicentered retrospective case series.
OBJECTIVE: To determine the incidence and circumstances surrounding the development of a symptomatic postoperative epidural hematoma in the cervical spine.
METHODS: Patients who underwent cervical spine surgery between January 1, 2005, and December 31, 2011, at 23 institutions were reviewed, and all patients who developed an epidural hematoma were identified.
RESULTS: A total of 16 582 cervical spine surgeries were identified, and 15 patients developed a postoperative epidural hematoma, for a total incidence of 0.090%. Substantial variation between institutions was noted, with 11 sites reporting no epidural hematomas, and 1 site reporting an incidence of 0.76%. All patients initially presented with a neurologic deficit. Nine patients had complete resolution of the neurologic deficit after hematoma evacuation; however 2 of the 3 patients (66%) who had a delay in the diagnosis of the epidural hematoma had residual neurologic deficits compared to only 4 of the 12 patients (33%) who had no delay in the diagnosis or treatment (P = .53). Additionally, the patients who experienced a postoperative epidural hematoma did not experience any significant improvement in health-related quality-of-life metrics as a result of the index procedure at final follow-up evaluation.
CONCLUSION: This is the largest series to date to analyze the incidence of an epidural hematoma following cervical spine surgery, and this study suggest that an epidural hematoma occurs in approximately 1 out of 1000 cervical spine surgeries. Prompt diagnosis and treatment may improve the chance of making a complete neurologic recovery, but patients who develop this complication do not show improvements in the health-related quality-of-life measurements
WHOI Hawaii Ocean Timeseries Station (WHOTS) : WHOTS-4 2007 mooring turnaround cruise report
The Woods Hole Oceanographic Institution (WHOI) Hawaii Ocean Timeseries (HOT)
Site (WHOTS), 100 km north of Oahu, Hawaii, is intended to provide long-term, high-quality
air-sea fluxes as a part of the NOAA Climate Observation Program. The WHOTS mooring also
serves as a coordinated part of the HOT program, contributing to the goals of observing heat,
fresh water and chemical fluxes at a site representative of the oligotrophic North Pacific Ocean.
The approach is to maintain a surface mooring outfitted for meteorological and oceanographic
measurements at a site near 22.75°N, 158°W by successive mooring turnarounds. These
observations will be used to investigate air–sea interaction processes related to climate
variability.
The first three WHOTS moorings (WHOTS-1 through 3) were deployed in August 2004,
July 2005 and June 2006, respectively. This report documents recovery of the WHOTS-3
mooring and deployment of the fourth mooring (WHOTS-4). Both moorings used Surlyn foam
buoys as the surface element and were outfitted with two Air–Sea Interaction Meteorology
(ASIMET) systems. Each ASIMET system measures, records, and transmits via Argos satellite
the surface meteorological variables necessary to compute air–sea fluxes of heat, moisture and
momentum. The upper 155 m of the moorings were outfitted with oceanographic sensors for the
measurement of temperature, conductivity and velocity in a cooperative effort with R. Lukas of
the University of Hawaii. A pCO2 system was installed on the WHOT-3 buoy in a cooperative
effort with Chris Sabine at the Pacific Marine Environmental Laboratory.
The WHOTS mooring turnaround was done on the University of Hawaii research vessel
Kilo Moana, Cruise KM-07-08, by the Upper Ocean Processes Group of the Woods Hole
Oceanographic Institution. The cruise took place between 24 June and 1 July 2007. Operations
began with deployment of the WHOTS-4 mooring on 25 June at approximately 22°40.2′N,
157°57.0′W in 4756 m of water. This was followed by meteorological intercomparisons and
CTDs at the WHOTS-4 and WHOTS-3 sites. The WHOTS-3 mooring was recovered on June
28th followed by CTD operations at the HOT site and shipboard meteorological observations at
several sites to the south of the mooring site. This report describes these cruise operations, as
well as some of the in-port operations and pre-cruise buoy preparations.Funding was provided by the National Oceanic and Atmospheric Administration
under Grant No. NA17RJ1223 for the Cooperative Institute for Climate and Ocean Research (CICOR)
Stratus Ocean Reference Station (20ËšS, 85ËšW), mooring recovery and deployment cruise R/V Revelle cruise dana 03, November 10 - November 26, 2003
The Ocean Reference Station at 20°S, 85°W under the stratus clouds west of northern
Chile and Peru is being maintained to provide ongoing, climate-quality records of surface
meteorology, of air-sea fluxes of heat, freshwater, and momentum, and of upper ocean
temperature, salinity, and velocity variability. The Stratus Ocean Reference Station,
hereafter ORS Stratus, is supported by the National Oceanic and Atmospheric
Administrations (NOAA) Climate Observation Program. It is recovered and redeployed
annually, with cruises that have come in October or November.
During the November 2003 cruise of Scripps Institution of Oceanography's R/V Roger
Revelle to the ORS Stratus site, the primary activities where the recovery of the WHOI
surface mooring that had been deployed in October 2002, the deployment of a new WHOI
surface mooring at that site, the in-situ calibration of the buoy meteorological sensors by
comparison with instrumentation put on board by Chris Fairall of the NOAA
Environmental Technology Laboratory (ETL), and observations of the stratus clouds and
lower atmosphere by NOAA ETL and Jason Tomlinson from Texas A&M.
The ORS Stratus buoys are equipped with two Improved Meteorological systems, which
provide surface wind speed and direction, air temperature, relative humidity, barometric
pressure, incoming shortwave radiation, incoming longwave radiation, precipitation rate,
and sea surface temperature. The IMET data are made available in near real time using
satellite telemetry. The mooring line carries instruments to measure ocean salinity,
temperature, and currents. On some deployments, additional instrumentation is attached to
the mooring to measure rainfall and bio-optical variability. The ETL instrumentation used
during the 2003 cruise included a cloud radar, radiosonde balloons, and sensors for mean
and turbulent surface meteorology.
In addition to this work, buoy work was done in support of the Ecuadorian Navy Institute
of Oceanography (INOCAR) and of the Chilean Navy Hydrographic and Oceanographic
Service (SHOA). The surface buoy, oceanographic instrumentation, and upper 500 m of
an INOCAR surface mooring at 2°S, 84°W that had been vandalized were recovered and
transferred to the Ecuadorian Navy vessel B. A. E. Calicuchima. A tsunami warning
mooring was installed at 75°W, 20°S for SHOA. SHOA personnel onboard were trained
during the cruise by staff from the NOAA Pacific Marine Environmental Laboratory
(PMEL) and National Data Buoy Center (NDBC). The cruise hosted two teachers
participating in NOAA's Teacher at Sea Program, Deb Brice from San Marcos, California
and Viviana Zamorano from Arica, Chile.Funding was provided by the National Oceanic and Atmospheric Administration uncer Contract Number NA17RJ1223
Rare Complications of Cervical Spine Surgery: Pseudomeningocoele.
STUDY DESIGN: This study was a retrospective, multicenter cohort study.
OBJECTIVES: Rare complications of cervical spine surgery are inherently difficult to investigate. Pseudomeningocoele (PMC), an abnormal collection of cerebrospinal fluid that communicates with the subarachnoid space, is one such complication. In order to evaluate and better understand the incidence, presentation, treatment, and outcome of PMC following cervical spine surgery, we conducted a multicenter study to pool our collective experience.
METHODS: This study was a retrospective, multicenter cohort study of patients who underwent cervical spine surgery at any level(s) from C2 to C7, inclusive; were over 18 years of age; and experienced a postoperative PMC.
RESULTS: Thirteen patients (0.08%) developed a postoperative PMC, 6 (46.2%) of whom were female. They had an average age of 48.2 years and stayed in hospital a mean of 11.2 days. Three patients were current smokers, 3 previous smokers, 5 had never smoked, and 2 had unknown smoking status. The majority, 10 (76.9%), were associated with posterior surgery, whereas 3 (23.1%) occurred after an anterior procedure. Myelopathy was the most common indication for operations that were complicated by PMC (46%). Seven patients (53%) required a surgical procedure to address the PMC, whereas the remaining 6 were treated conservatively. All PMCs ultimately resolved or were successfully treated with no residual effects.
CONCLUSIONS: PMC is a rare complication of cervical surgery with an incidence of less than 0.1%. They prolong hospital stay. PMCs occurred more frequently in association with posterior approaches. Approximately half of PMCs required surgery and all ultimately resolved without residual neurologic or other long-term effects
Epidemiology and Outcomes of Vertebral Artery Injury in 16 582 Cervical Spine Surgery Patients: An AOSpine North America Multicenter Study.
STUDY DESIGN: A multicenter retrospective case series was compiled involving 21 medical institutions. Inclusion criteria included patients who underwent cervical spine surgery between 2005 and 2011 and who sustained a vertebral artery injury (VAI).
OBJECTIVE: To report the frequency, risk factors, outcomes, and management goals of VAI in patients who have undergone cervical spine surgery.
METHODS: Patients were evaluated on the basis of condition-specific functional status using the Neck Disability Index (NDI), modified Japanese Orthopaedic Association (mJOA) score, the Nurick scale, and the 36-Item Short-Form Health Survey (SF-36).
RESULTS: VAIs were identified in a total of 14 of 16 582 patients screened (8.4 per 10 000). The mean age of patients with VAI was 59 years (±10) with a female predominance (78.6%). Patient diagnoses included myelopathy, radiculopathy, cervical instability, and metastatic disease. VAI was associated with substantial blood loss (770 mL), although only 3 cases required transfusion. Of the 14 cases, 7 occurred with an anterior-only approach, 3 cases with posterior-only approach, and 4 during circumferential approach. Fifty percent of cases of VAI with available preoperative imaging revealed anomalous vessel anatomy during postoperative review. Average length of hospital stay was 10 days (±8). Notably, 13 of the 14 (92.86%) cases resolved without residual deficits. Compared to preoperative baseline NDI, Nurick, mJOA, and SF-36 scores for these patients, there were no observed changes after surgery (P = .20-.94).
CONCLUSIONS: Vertebral artery injuries are potentially catastrophic complications that can be sustained from anterior or posterior cervical spine approaches. The data from this study suggest that with proper steps to ensure hemostasis, patients recover function at a high rate and do not exhibit residual deficits
Stratus Ocean Reference Station (20˚S, 85˚W), mooring recovery and deployment cruise R/V Ronald H. Brown cruise 05-05, September 26, 2005–October 21, 2005
The Ocean Reference Station at 20°S, 85°W under the stratus clouds west of northern Chile is being maintained to provide
ongoing, climate-quality records of surface meteorology, of air-sea fluxes of heat, freshwater, and momentum, and of upper ocean
temperature, salinity, and velocity variability. The Stratus Ocean Reference Station (ORS Stratus) is supported by the National
Oceanic and Atmospheric Administration’s (NOAA) Climate Observation Program. It is recovered and redeployed annually, with
cruises that have come between October and December. During the October 2005 cruise of NOAA’s R/V Ronald H. Brown to the
ORS Stratus site, the primary activities were recovery of the WHOI surface mooring that had been deployed in December 2004,
deployment of a new WHOI surface mooring at that site, in-situ calibration of the buoy meteorological sensors by comparison
with instrumentation put on board by staff of the NOAA Environmental Technology Laboratory (ETL), and observations of the
stratus clouds and lower atmosphere by NOAA ETL. The ORS Stratus buoys are equipped with two Improved Meteorological
(IMET) systems, which provide surface wind speed and direction, air temperature, relative humidity, barometric pressure,
incoming shortwave radiation, incoming longwave radiation, precipitation rate, and sea surface temperature. The IMET data are
made available in near real time using satellite telemetry. The mooring line carries instruments to measure ocean salinity,
temperature, and currents. The ETL instrumentation used during the 2005 cruise included cloud radar, radiosonde ballons, and
sensors for mean and turbulent surface meteorology. In addition, two technicians from the University of Concepcion collected
water samples for chemical analysis. Finally, the cruise hosted a teacher participating in NOAA’s Teacher at Sea Program.Funding was provided by the National Oceanic and Atmospheric Administration
under Grant No. NA17RJ1223 and the Cooperative Institute for Climate and Ocean Research (CICOR)
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