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HarrisRobertCEOASCobaltBasedAgeSupportingInformationS1.pdf
No full textDating pelagic clay can be a challenge due to its slow sedimentation rate, post-depositional alteration, and lack of biogenic deposition. Co-based dating techniques have the potential to create age models in pelagic clay under the assumption that the flux of non-detrital Co to the seafloor is spatially and temporally constant, resulting in the non-detrital Co concentrations being inversely proportional to sedimentation rate. We apply a Co-based method to the pelagic clay sequences from Sites U1365, U1366, U1369, and U1370 drilled during Integrated Ocean Drilling Program (IODP) Expedition 329 in the South Pacific Gyre. We distinguished non-detrital Co from detrital Co using multivariate statistical partitioning techniques. We found that the non-detrital flux of Co at Site U1370 is approximately twice as high as that at the other sites, implying that the non-detrital Co flux is not regionally constant. This regional variation reflects the heterogeneous distribution of Co in the water column, as is observed in the present day. We present an improved approach to Co-based age modeling throughout the South Pacific Gyre and determine that the Co-based method can effectively date oxygenated pelagic clay deposited in the distal open ocean, but is less reliable for deposition closer to continents. When extending the method to geologically old sediment, it is important to consider the paleolocation of a given site to ensure these conditions are met.Keywords: marine sediments, processes and transport, South Pacific Gyre, cobalt age models, sedimentary geochronology, sedimentary geochemistry, pelagic cla
Oregon State Forester ; Vol. 31, No. 1 (January 1978)
No full textMagazine of the OSU Forestry Alumni Association.Keywords: Forest Engineering, With The Classes, Ted Kulongoski, Forestry Media Center, Resources Recreation Management, Forest Science, Jack Duff, Forest Management, Orin Palmer, Ralph Floberg, Max Rikjen, Forestry Extension, Dick Magruder, T.J. Starker, Forest Products, Peavy Hall Open House, Mike Newton, Max Simpson, Tony Van Vliet, Alumni President, School Personalitie
Recreational fisheries in the USA: economics, management strategies, and ecological threats
Full text linkRecreational fishing has a long history in the USA, developing from the subsistence fisheries of Native Americans together with a partial subsistence fishery of later immigrants. Marine, diadromous, and aquatic taxa are targeted, including both vertebrates and macroinvertebrates. This paper defines recreational fishing, describes the main fishing techniques, identifies target taxa by region, summarizes the socio-economic values of recreational fishing, and discusses management strategies and major ecological threats.Keywords: Outdoor recreation, Angling, Sport fishing, Ecosystem service
Concurrence of the Acarapis Species Complex (Acari: Tarsonemidae) in a Commercial HoneyBee Apiary in the Pacific Northwest
Full text linkAn examination of a commercial honey-bee apiary for the Acarcapis species complex revealed the following: queens were essentially free from Acarapis parasitism: colonies were more frequently
infested with A. dorsaiis and A. woodi than A. externus: individual worker-bee hosts were
rarely parasitized by more than one Acarapis species. Observed sex ratios for all three mite species.
under the conditions of the relatively low infestation rate observed in this study, favored females
over males.Keywords: Honey Bees, Acarapis Species Comple
GaylordAdamFisheriesWildlifeCausesConsequencesTiming_SupplementalMaterial.xls
No full textDirect behavioral observations of multiple free-ranging animals over long periods of time and large geographic areas is
prohibitively difficult. However, recent improvements in technology, such as Global Positioning System (GPS) collars
equipped with motion-sensitive activity monitors, create the potential to remotely monitor animal behavior.
Accelerometer-equipped activity monitors quantify animal motion with different amounts of movement presumably
corresponding to different animal activities. Variations in motion among species and differences in collar design
necessitate calibration for each collar and species of interest. We paired activity monitor data collected using Lotek
GPS_4400 collars worn by captive Rocky Mountain elk Cervus elaphus nelsoni with simultaneously collected behavior
observations. During our initial data screening, we observed many sampling intervals of directly observed behavior
that did not pair to activity monitor data in a logical fashion. For example, intervals containing behaviors associated
with little or no motion sometimes aligned with relatively high activity monitor values. These misalignments, due to
errors associated with collar timekeeping mechanisms, would likely result in inaccurate classification models. We
corrected timing errors by using defined breaks in animal behavior to shift times given by collar output, improving the
average correct classification rate 61.7 percentage points for specific behaviors. Furthermore, timing errors were
significantly reduced by increasing the GPS fix rate, by using a sampling interval divisible by 8 seconds, and by
accurately timing the initial collar activation. Awareness and management of collar timing error will enable users to
obtain the best possible estimates of true behavior when calibrating these collars and interpreting data from free-ranging
animals.Keywords: Behavior tracking, Accelerometers, GPS collars, Timing errors, Elk, Activity monitor
Appendix Video 3.7.avi
No full textAccurate chromosome segregation and cell cleavage are critical to maintaining genomic integrity. Both events involve the spindle apparatus, but the exact mechanics is as puzzling as the contradicting models proposed in the last two centuries. In this dissertation, current prevailing models of chromosome segregation and cell cleavage are tested using a newly-developed Multimode Microsurgery and Imaging System. The system permits remodeling of the spindle structure in testing the current models and proposing new theories.
The mechanics of chromosome segregation is a process coupled to the shortening of kinetochore microtubules (kMTs). Which end shortens and whether the shortening provides poleward forces remain unsolved, since depolymerization may occur at the plus ends by ‘Pac-Man’ activities of a kinetochore and/or the minus ends by Poleward Flux of microtubules (Traction Fibers). Alternatively, the shortening may be secondary to the force-generating Spindle Matrix and/or the non-kMTs. I differentiated these models in grasshopper spermatocytes by revealing dynamics of laser-severed kMTs both in and outside the context of the spindle. I found that the kMTs dynamically maintain their length by poleward flux, polymerizing at the plus ends while depolymerizing at the minus ends without net shortening. Poleward forces are generated when net-shortening of the kMTs occurs at the spindle poles, ‘reeling in’ the attached chromosomes.
The mechanics of cleavage furrow induction is a process mediated by spindle microtubules and associated proteins, arguably via Polar Relaxation or Equatorial Stimulation mechanisms. By manipulating distribution of actin filaments in silkworm spermatocytes, I show that ‘relaxation’ can be induced at any region of the cell cortex by any microtubules mechanically brought nearby. The relaxation causes exclusion of cortical actin filaments, which depends on microtubule dynamics but not RhoA activity. ‘Stimulation’ can also be induced at any region of the cell cortex by the plus ends of central spindle microtubules brought nearby. The stimulation occurs as rapid de novo assembly of actin patches at the microtubule overlap and their lateral transport to the cortex, both of which depend on RhoA activity but not microtubule dynamics. I conclude that polar relaxation and equatorial stimulation coexist in cytokinesis, providing cell cleavage with ‘double insurance.
Health status of glucose-6-phosphate dehydrogenase (G6PD) deficient and other newborns in Sarawak, Malaysia
Full text linkIntroduction: To study the health status of 200 G6PD enzyme-deficient Sarawak newborns, we compared their birth records to those of non-deficients in terms of low birth weight (LBW). To characterize ethnic groups, we analysed newborns in terms of LBW and G6PD population frequency.
Methods: For this retrospective study, health records for the year 2006 were obtained from the Sarawak General Hospital. Enzyme deficiency was determined by the fluorescent spot test.
Results: In a sample of 1248 newborns, 12.3% had low birth weight (LBW). The enzyme-deficient newborns were comparable to non-deficients in terms of LBW. Ethnic groups differed in their population frequency of the genetic deficiency. Genetic-deficiency data on Chinese and Melanau in Sarawak are reported here for the first time. In contrast to the usual studies on adults, G6PD studies on newborns reveal the deficiency transmission rate and provide a baseline fto guage the future health status of deficient children.
Conclusion: While deficient newborns showed no relative excess of LBW, the deficiency persists in populations in Sarawak, despite the known vulnerability to hemolytic anaemia caused by oxidizing agents. This persistence accords with the persistence of malaria in Sarawak, to which G6PD deficiency is known to provide some resistance.Keywords: Sarawak, health, newborns, G6PD, genetic
REASEARCH PAPER-1.pdf
No full textThis paper will focus on the relationship between institutional internalization and organic solidarity. Being that there is a wide verity of different institutions, this writing will focus primarily on only religion, politics, and education. The internalization of the individual from each of these institutions greatly effects their beliefs, desires, and action, which as a result branches out into society from a mechanical solidarity operation into a more organic solidarity operation. Organic solidarity will depend on individuals in their respected association, to internalize their specific role. A control variable was used in this research to detect any spurious relationships that may change the final data and to avoid a type I or II error. The controlled variables used were five different categorizes of religious affiliation. Without the controlled variable the significance of the relationship between Institutional Internalization and Organic Solidarity was only .179. With the five controlled variables applied there was no significance found. With an additional Regression Analysis calculated there was minimal significance found with specific variables.Keywords: Solidarity, Organic, Institutio