1,386 research outputs found
Cerromojonite, CuPbBiSe3, from El Dragón (Bolivia): A New Member of the Bournonite Group
Parasites of the Spotted Sucker, Minytrema melanops (Cypriniformes: Catostomidae) from Arkansas and Oklahoma
During October 2015, March and April 2016 and again between March and April 2017, 15 Spotted Sucker (Minytrema melanops) were collected from sites in the Ouachita (n = 5), Red (n = 1), and St. Francis (n = 5) river drainages, Arkansas, and the Arkansas River drainage, Oklahoma (n = 4), and examined for protozoan and metazoan parasites. Found were Calyptospora sp., Myxobolus sp., Pseudomurraytrema alabarrum, Biacetabulum banghami, Penarchigetes oklensis, and Acanthocephalus sp. New host and distributional records are documented for these parasites
Redescription of Eimeria macyi (Apicomplexa: Eimeriidae) from the Eastern Pipistrelle, Pipistrellus subflavus (Mammalia: Chiroptera), From Arkansas
A decade of monitoring Atlantic cod Gadus morhua spawning aggregations in Massachusetts Bay using passive acoustics
© The Author(s), 2020. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Caiger, P. E., Dean, M. J., DeAngelis, A. I., Hatch, L. T., Rice, A. N., Stanley, J. A., Tholke, C., Zemeckis, D. R., & Van Parijs, S. M. A decade of monitoring Atlantic cod Gadus morhua spawning aggregations in Massachusetts Bay using passive acoustics. Marine Ecology Progress Series, 635, (2020): 89-103, doi:10.3354/meps13219.Atlantic cod Gadus morhua populations in the northeast USA have failed to recover since major declines in the 1970s and 1990s. To rebuild these stocks, managers need reliable information on spawning dynamics in order to design and implement control measures; discovering cost-effective and non-invasive monitoring techniques is also favorable. Atlantic cod form dense, site-fidelic spawning aggregations during which they vocalize, permitting acoustic detection of their presence at such times. The objective of this study was to detect spawning activity of Atlantic cod using multiple fixed-station passive acoustic recorders to sample across Massachusetts Bay during the winter spawning period. A generalized linear modeling approach was used to investigate spatio-temporal trends of cod vocalizing over 10 consecutive winter spawning seasons (2007-2016), the longest such timeline of any passive acoustic monitoring of a fish species. The vocal activity of Atlantic cod was associated with diel, lunar, and seasonal cycles, with a higher probability of occurrence at night, during the full moon, and near the end of November. Following 2009 and 2010, there was a general decline in acoustic activity. Furthermore, the northwest corner of Stellwagen Bank was identified as an important spawning location. This project demonstrated the utility of passive acoustic monitoring in determining the presence of an acoustically active fish species, and provides valuable data for informing the management of this commercially, culturally, and ecologically important species.Thanks to Eli Bonnell, Genevieve Davis, Julianne Bonell, Samara Haver, and Eric Matzen for assistance in MARU deployments, Dana Gerlach and Heather Heenehan for help in passive acoustic data analysis, and the NEFSC passive acoustics group for useful discussions. Funding for 2007â2012 passive acoustic surveys was provided by Excelerate Energy and Neptune LNG to
Cornell University. Fieldwork for 2013â2015 was funded through the 2013â2014 NOAA Saltonstall-Kennedy grant program (Award No. NA14NMF4270027), and jointly funded by The Nature Conservancy, Massachusetts Division of Marine Fisheries, and the Cabot Family Charitable Foundation. Funding for 2016 SoundTrap data was provided by NOAAâs Ocean Acoustics Program (4 Sanctuaries Project)
ArsenotuÄekite, Ni 18 Sb 3 AsS 16 , a new mineral from the Tsangli chromitites, Othrys ophiolite, Greece
AbstractArsenotuÄekite, Ni18Sb3AsS16, is a new mineral discovered in the abandoned chromium mine of Tsangli, located in the eastern portion of the Othrys ophiolite complex, central Greece. Tsangli is one of the largest chromite deposit at which chromite was mined since 1870. The Tsangli chromitite occurs as lenticular and irregular bodies. The studied chromitites are hosted in a strongly serpentinized mantle peridotite. ArsenotuÄekite forms anhedral to subhedral grains that vary in size between 5 ÎŒm up to 100 ÎŒm, and occurs as single phase grains or is associated with pentlandite, breithauptite, gersdorffite and chlorite. It is brittle and has a metallic luster. In plane-polarized light, it is creamy-yellow, the bireflectance is barely perceptible and the pleochroism is weak. In crossed polarized reflected light, the anisotropic rotation tints vary from pale blue to brown. Internal reflections were not observed. Reflectance values of arsenotuÄekite in air (Ro, ReâČ in %) are: 41.8â46.4 at 470 nm, 47.2â50.6 at 546 nm, 49.4â52.3 at 589 nm, and 51.3â53.2 at 650 nm. The empirical formula of arsenotuÄekite, based on 38 atoms per formula unit, and according to the structural results, is (Ni16.19Co1.01Fe0.83)ÎŁ18.03Sb3(As0.67Sb0.32)ÎŁ0.99S15.98. The mass density is 6.477 g·cmâ3. The simplified chemical formula is (Ni,Co,Fe)18Sb3(As,Sb)S16. The mineral is tetragonal and belongs to space group I4/mmm, with aâ=â9.7856(3) Ă
, câ=â10.7582(6) Ă
, Vâ=â1030.2(6) Ă
3 and Zâ=â2. The structure is layered (stacking along the c-axis) and is dominated by three different Ni-coordination polyhedral, one octahedral and two cubic. The arsenotuÄekite structure can be considered as a superstructure of tuÄekite resulting from the ordering of Sb and As. The name of the new mineral species indicates the As-dominant of tuÄekite. ArsenotuÄekite occurs as rims partly replacing pentlandite and irregularly developed grains. Furthermore, it is locally associated with chlorite. These observations suggest that it was likely precipitated at relatively low temperatures during: 1) the late hydrothermal stages of the ore-forming process by reaction of Sb- and As-bearing solutions with magmatic sulfides such as pentlandite, or 2) during the serpentinization of the host peridotite. The mineral and its name have been approved by the Commission of New Minerals, Nomenclature, and Classification of the International Mineralogical Association (number 2019â135)
Helminth Parasites of the Golden Topminnow, Fundulus chrysotus (Cyprinidontiformes: Fundulidae) from Desha County, Arkansas
During July 2019, 21 Golden Topminnows (Fundulus chrysotus) were collected from an oxbow lake in McGehee, Desha County, Arkansas, and examined for parasites. Found were 4 taxa of endoparasites, including 3 digeneans (Clinostomum marginatum, Homalometron sp., and Posthodiplostomum minimum) and a nematode (Spiroxys contortus). We document a new host record for S. contortus and the first report of parasites in F. chrysotus from the lower Mississippi River Drainage
Zonisamide (CI-912) and Cognition: Results from Preliminary Study
Nine patients with refractory partial seizures were evaluated in a pilot study of a new anticonvulsant compound, zonisamide (l,2-benzisoxazole-3-methane-sulfonamide; CI-912). Cognitive functioning was evaluated prior to treatment with zonisamide and repeated after 12 and 24 weeks of treatment with zonisamide. At minimum steady-state plasma concentrations >30 jjug/ml, zonisamide appeared to affect specific cognitive functions such as acquisition and consolidation of new information. Previously learned material, such as vocabulary, and psychomotor performance were not affected. Verbal learning was affected, while visual-perceptual learning was unimpaired. These cognitive effects were observed in the absence of the usual clinical signs and symptoms of toxicity. A linear relationship was found between impairment of cognitive abilities and the minimum plasma concentration (r = -0.73; p < 0.05). Findings also suggest the development of tolerance to the adverse cognitive effects. RESUMEN En un estudio piloto realizado para valorar la eficacia de la zonisamida (1,2-Bencisoxazol-melanosulfonamida [CI-912]), un nuevo compuesto anticonvulsive se han evaluado unos 9 pa-cientes con ataques parciales refractarios al tratamiento. Se de-terminĂ la capacidad cognitiva anterior al tratamiento y se re-pitio 12 y 24 semanas despuĂs del tratamiento con zonisamida. Con concentraciones plasmĂticas mĂnimas estables per encima de 30 mcg/ml, la zonisamida afectĂ las funciones cognitives especĂficas tales como la adquisiciĂn y consolidaciĂn de nueva informaciĂn. El material aprendido previamente, tal como el vo-cabulario, y las funciones psicomotoras no se afectaron. El aprendizaje verbal se modificĂ mientras que el aprendizaje visuo-perfectivo no se modificĂ. Estos efectos cognitivos se ob-servaron en ausencia de los habituales signos y sĂntomas clĂnicos de toxicidad. Se encontrĂ una relaciĂn lineal entre la alteraciĂn de las posibilidades cognitivas y la concentraciĂn plasmĂtica mĂnima (r = -0.73, p < 0.05). Estos hallazgos tambiĂn sugieren el desarrollo de una tolerancia a los efectos cognitivos adversos. ZUSAMMENFASSUNG 9 Patienten mit rezidivierenden Partial-AnfĂllen wurden in einer Pilotstudie mit einer neuen antiepileptischen Substanz: Zonisamide untersucht. Die kognitiven Funktionen wurden vor der Behandlung mit Zonisamide geprtĂft und nach 12 und 24 Therapiewochen mit Zonisamide wiederholt. Bei einem Min-destplasmaspiegel von 30 mcg/ml schien Zonisamide spezifische kognitive FĂhigkeiten wie Aufnahme und Speicherung neuer In-formationen zu beeintrĂchtigen. Vorher gelernte Inhalte wie sprachliche und psychomotorische Fertigkeiten wurden nicht beeinfluĂt. Verbales Lernen war ebenfalls betroffen, wĂhrend visuell, perzeptives Lernen nicht verschlechtert war. Diese BeeintrĂchtigung kognitiver Funktionen wurde bei fehlenden klinischen Intoxikationszeichen beobachtet. Eine lineare Bezie-hung zwischen Verschlechterung kognitiver FĂhigkeiten und Mindest-Plasmaspiegel konnte hergestellt werden (r = -0,73; p < 0,05). Allerdings lassen die Ergebnisse auch auf eine GewĂhnung an diese unerwĂnschten Nebenwirkungen schlieĂen.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/65995/1/j.1528-1157.1987.tb03624.x.pd
Pilot Study of Zonisamide (1,2-Benzisoxazole-3-methanesulfonamide) in Patients with Refractory Partial Seizures
A new anticonvulsant compound, zonisamide (1,2 benzioxazole-methanesulfonamide), was studied in 10 adults with medically refractory partial seizures. Following a single oral dose of 400 mg, peak plasma levels occurred an average of 2.8 h after dosing, and the mean clearance from plasma was 2.34 L/h. Whole blood concentrations were high than plasma concentrations because of red blood cell binding. steady-state plasma concentrations were high than predicted from a linear kinetic model. In most patients, seizure frequency was reduced after zonisamide was substituted for a standard antiepileptic drug. Dose-related reversible side effects in the central nervous and gastrointestinal system were observed. Most patients tolerated doses between 5.2 and 12.5 mg/kg/day. RĂSUMĂ Un nouveau produit anticonvulsivant, le zonisamide (1,2 benziosoxazole-methylsulfonamide) a ĂtĂ administrĂĂ 10 adultes atteints de crises partielles non contrĂlĂes par le traitement mĂdical. AprĂs une dose unique orale de 400 mg, le pic du taux plasmatique survient en moyenne 2 h 1/2 aprĂs l'ingestion, et la clairance plasmatique moyenne est de 2,34 litres par heure. les concentrations sanguines totales sont plus ĂlevĂes que les concentrations plasmatiques, en raison de la liaison aux globules rouges, les concentrations plasmatiques Ă l'Ătat d'equilibre sont plus ĂlevĂes que celles que l'on peut dĂdurie d'un modĂle de cinĂtique linĂaire. Chez la plupart des patients, la frĂquence des crises a ĂtĂrĂduite par la substitution du zonisamide au traitement antiĂpileptique standard. Des effets secondaires doses-dĂpendants et rĂversibles ont ĂtĂ observĂs au niveau du systĂme nerveux central et du tube digestif. La plupart des patients ont tolĂrĂ des doses entre 5,2 et 12,5 mg/kg de poids par jour. RESUMEN En 10 adultos con ataques parciales refractarios a1 tratamiento mĂdico, se ha estudiado la acciĂn de un nuevo compuesto anticonvulsivo, la zonisamida (1,2 benzisoxazol-metanosulfonamida). Tras la ingestiĂn de una sola dosis oral de 400 mg., se alcanzaron los niveles pico en plasma en un promedio de 2.8 horas desputs de la dosis y el aclaramiento medio del plasma fuĂ de 2, 34 litros/hora. Las concentraciones en sangre fueron mĂs altas que las plasmĂticas debido a que la medicaciĂn se ligaba a los hematies. Las concentraciones plasmĂticas estables fueron mĂs altas que las previsibles de un modelo cinĂtico lineal. En la mayorĂa de los pacientes la frecuencia de los ataques se redujo despuĂs de cambiar la medicaciĂn antiepilĂptica standard por la zonisamida. TambiĂn se observaron los efectos colaterales sobre el tracto gastrointestinal y el sistema nervioso central que estaban relacionadas con la dosis y eran reversibles. La mayor parte de los pacientes tolerĂ dosis que oscilaban entre 5.2 y 12.5 mg/kg/dĂa. ZUSAMMENFASSUNG Ein neues Antikonvulsivum, Zonisamid (1,2 Benzisoxazol-Methansulfonamid) wurde bei 10 Envachsenen mit therapieresistenten PartialanfĂllen gesucht. Nach einer oralen Einzeldosis von 400 mg wurden Plasmaspitzenwerte im Durchschnitt nach 2, 8 Stunden erreicht. Die mittlere Clearance aus dem Plasma betrug 2, 34 L/Stunde. Ganzblutkonzentrationen waren hĂher als Plasmakonzentrationen aufgrund der Bindung an die roten BlutkĂrperchen. Die steady-state Plasmakonzentrationen waren hĂher als bei einem linearen kinetischen Modell zu envarten. Bei den meisten Patienten konnte die Anfallsfrequenz nach Substitution eines Standardantiepileptikums durch Zonisamid reduziert werden. Es bestanden dosisabhĂngige, reversible, zentral-nervĂse und gastrointestinale Nebenwirkungen. Die meisten Patienten tolerierten Dosen zwischen 5, 2 und 12, 5 mg/kg/Tag.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/65938/1/j.1528-1157.1985.tb05407.x.pd
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