Studies on the Manganese Cycle

The first studies on the manganese cycle in impoundments were concerned with the manganese concentrations in and removal from bottom waters of deep impoundments. But as work progressed, the emphasis was more on the investigation of the mechanism by which manganese is dissolved in impounded waters

Solubility of Manganese and Iron in Impoundment Waters

The purpose of this paper is to show the rate of solubility of certain elements (manganese and iron) in impoundment waters. The rate at which manganese and iron becomes soluble is important in determining if there is a change in the solubility of these elements in impoundment water and free running water. The solubility of an element under impoundment waters represents a cycle. The mud on the bottom of impoundment waters contain the elements that are insoluble. At a certain stage the element becomes soluble, and it is released from the mud. The soluble element is much lighter than the insoluble one, and it therefore rises toward the surface. When it nears the top, there is a reaction; the particles become insoluble. They are heavier than the water particles and fall back down, settling in the mud to start the cycle over again. In impoundment waters, there is a higher degree of soluble particles near the bottom than the top

The variable toxicity of silver ions in cell culture media

The elevated interest in silver ions (Ag+) as a broad spectrum antimicrobial for use on medical devices has increased the number and importance of in vitro biocompatibility testing, however little consideration is given to the culture environment in which the assessments are performed. The current investigation assessed the viability of mouse fibroblasts (L929) exposed to different concentrations of Ag+ in both Dulbecco's modified Eagle's medium (DMEM) and minimal essential medium Eagle, alpha modification (αMEM). We identified a significant increase in the EC50 of L929 cells exposed to Ag+ in αMEM compared to DMEM, which was matched by a corresponding decrease in Ag+ availability in αMEM at concentrations ≤400 μM, as detected by inductively coupled plasma mass spectrometry (ICP-MS). The reduced availability was not observed for Ag+ > 400 μM, the concentration above which caused in vitro cytotoxicity in L929 cells in αMEM; while linear quantification of Ag+ was observed in DMEM. Equilibration of the chloride and glucose components between media did not affect cytotoxicity on primary test cells; mesenchymal stromal cells (MSCs). Overall, our results present evidence of the importance of culture conditions on the in vitro evaluation of silver, with DMEM providing a reliable basal media in which to conduct assessments

Prevalencia y evaluación de la carga parasitaria de cerdos criados en los distritos de el Mantaro y San Lorenzo, provincia de Jauja,departamento de Junín

Las parasitosis que afectan a los cerdos se caracterizan por ocasionar pérdidas económicas a los productores. Los parásitos reducen el índice de conversión alimenticia y disminuyen la productividad de la crianza de porcinos. El objetivo del presente estudio fue determinar que parásitos tenían prevalencias mayores al 5% y calcular la carga parasitaria de los mismos en los distritos de El Mantaro y San Lorenzo. Se recolectaron 257 muestras de heces de cerdo durante los meses de junio a agosto del 2013. Las muestras fueron evaluadas mediante los métodos de flotación, sedimentación y McMaster modificado. Se obtuvo una prevalencia total de 22.57% para Ascaris summ, 73.15% para HTS, 18.68% para Trichuris suis, 41.25% para Metastrongylus spp. y 12.06% para Fasciola hepatica. La carga promedio hallada fue de 2.62 hpg para Ascaris summ, 100.04 hpg para HTS, 1.33 hpg para Trichuris suis, 6.07 hpg para Metastrongylus spp. y 0.68 hpg para F. hepatica. Palabras claves: Porcinos, HTS, Fasciola hepatica, Ascaris summ, Metastrongylus spp., Trichuris suis, Valle del Mantaro.--- Parasitic diseases of pigs are characterized by producing economic losses to producers. Parasites reduce feed conversion ratio and decrease productivity of pigs. The aim of this study was to determine which parasites have prevalence rates higher than 5% and calculate the parasitic load of each of the parasites in the districts of the Mantaro and San Lorenzo. Two hundred and fifty seven fecal samples of pig feces were collected during the months of June to August 2013. The samples were evaluated using the following methods: flotation, sedimentation and modified McMaster. Pevalence of Ascaris suum was 22.57 %, 73.15 % for HTS, 18.68 % for Trichuris suis, 41.25 % for Metastrongylus spp and 12.06 % for Fasciola hepatica . The average load was found 2.62 for Ascaris summ EPG, EPG for HTS 100.04, 1.33 for Trichuris suis EPG, EPG for Metastrongylus spp. 6.07 and 0.68 epg for F. hepatica. Keywords: Swine, HTS, Fasciola hepatica, Ascaris summ, Metastrongylus spp., Trichuris suis, Mantaro Valley.Tesi

Maximizing the greenhouse gas reductions from biomass: The role of life cycle assessment

Biomass can deliver significant greenhouse gas reductions in electricity, heat and transport fuel supply. However, our biomass resource is limited and should be used to deliver the most strategic and significant impacts. The relative greenhouse gas reduction merits of different bioenergy systems (for electricity, heat, chemical and biochar production) were examined on a common, scientific basis using consistent life cycle assessment methodology, scope of system and assumptions. The results show that bioenergy delivers substantial and cost-effective greenhouse gas reductions. Large scale electricity systems deliver the largest absolute reductions in greenhouse gases per unit of energy generated, while medium scale wood chip district heating boilers result in the highest level of greenhouse gas reductions per unit of harvested biomass. However, ammonia and biochar systems deliver the most cost effective carbon reductions, while biochar systems potentially deliver the highest greenhouse gas reductions per unit area of land. The system that achieves the largest reduction in greenhouse gases per unit of energy does not also deliver the highest greenhouse gas reduction per unit of biomass. So policy mechanisms that incentivize the reductions in the carbon intensity of energy may not result in the best use of the available resource. Life cycle assessment (LCA) is a flexible tool that can be used to answer a wide variety of different policy-relevant, LCA “questions”, but it is essential that care is taken to formulate the actual question being asked and adapt the LCA methodology to suit the context and objective

Campus Vol III N 3

Olwin, Lynn. The Vacuum. Prose. 2. Gilbert, Ralph and Terry Thurn. Backstage With Home of The Brave . Prose. 4. Marshall, Jim. Boy Meets Laundromat . Prose. 6. Cooperrider, Tom. From One Room . Prose. 7. Thurn, Terry. Evaluation of a Blind Date . Picture. 8. Wishard, Rod. The Case Presented . Prose. 10. Horyn, Gene. Tug of War With Time Clocks . Prose. 11. Gould, James and Jack Matthews. Cigarettes and Coke and Wild, Wild Coeds . Prose. 13

METS2 Discussion Group 3

Discussion Grou

Gender-specific 30-day outcomes after carotid endarterectomy and carotid artery stenting in the Society for Vascular Surgery Vascular Registry

ObjectiveAlthough the optimal treatment of carotid stenosis remains unclear, available data suggest that women have higher risk of adverse events after carotid revascularization. We used data from the Society for Vascular Surgery Vascular Registry to determine the effect of gender on outcomes after carotid endarterectomy (CEA) and carotid artery stenting (CAS).MethodsThere were 9865 patients (40.6% women) who underwent CEA (n = 6492) and CAS (n = 3373). The primary end point was a composite of death, stroke, and myocardial infarction at 30 days.ResultsThere was no difference in age and ethnicity between genders, but men were more likely to be symptomatic (41.6% vs 38.6%; P < .003). There was a higher prevalence of hypertension and chronic obstructive pulmonary disease in women, whereas men had a higher prevalence of coronary artery disease, history of myocardial infarction, and smoking history. For disease etiology in CAS, restenosis was more common in women (28.7% vs 19.7%; P < .0001), and radiation was higher in men (6.2% vs 2.6%; P < .0001). Comparing by gender, there were no statistically significant differences in the primary end point for CEA (women, 4.07%; men, 4.06%) or CAS (women, 6.69%; men, 6.80%). There remains no difference after stratification by symptomatology and multivariate risk adjustment.ConclusionsIn this large, real-world analysis, women and men demonstrated similar results after CEA or CAS. These data suggest that, contrary to previous reports, women do not have a higher risk of adverse events after carotid revascularization

Prospectus, March 25, 1976

CHAMPIONSHIPS BECKON P/C WINNING SPEAKERS; CBS\u27 Edwards Commencement speaker: Schorr to speak here Mar. 29; Pre-registration set for Apr. 19-30; PC news in brief: Bicentennial Week Activities, Craft Festival Day, On-Going Activities; Letters to the Editor: Peoples\u27 Forum; PC Board of Trustees Election set April 10; Vets Elect; Smith: \u27Parkland has spoken\u27; Bunnies revolutionize Stu-Go; Parkland Observes 10th Anniversary; Fiddler, Singer perform; Exhibits, spinning to be shown; Craft festival Apr. 3 at P/C; Micro Tech comes to the rescue: Clock to tick again July 4; Commager campus appearance highlight of Bicentennial week; Talents of older people on exhibit; Student Government Calendar of Events; 2-day Health Fair on campus; Debaters take third; Recycle contest; Thanks; Skylines: Stellar Origin of Life; LRC reports on latest requests: no, yes, no....; Hands; Bookstore Bulletins; Country Bouquet; Audio-Visual Dept. offers study materials; Judge speaks April 6; April 1 Meeting; Award Letter; Under hypnosis, \u27Bear\u27 bares all; Classifieds; Cobra\u27s Corner: Jim Reed, \u27Class A\u27 Coach for 5 seasons; Cobra\u27s .500 after 8 games; Emmet Fairfield wins Bouncing Bob\u27s Bonanza; Bouncing Bob\u27s Basketball Bonanza; \u2724 oz.\u27 win IM Basketball; IM Softball starts; Rooms provide needed P.E. space; 1st home game April 5th: Womens\u27 softball beginshttps://spark.parkland.edu/prospectus_1976/1019/thumbnail.jp