3,444 research outputs found
Effect of Phytosanitary Irradiation on the Quality of Two Varieties of Pummelos (\u3cem\u3eCitrus maxima\u3c/em\u3e (Burm.) Merr.)
Phytosanitary treatments prevent the introduction of pests such as fruit flies into pest free zones, and are often required for international trade. Irradiation is increasingly being considered as an alternative to cold and chemical phytosanitary treatments, such as methyl bromide. In this study, the effect of low dose gamma irradiation on the post-harvest quality of two varieties of pummelos (Citrus maxima (Burm.) Merr.), an emerging crop of interest in the US was evaluated. Two varieties of pummelos grown in California were irradiated at the phytosanitary target dose of 150 Gy and a higher dose of 1000 Gy to exaggerate and hence confirm the effects of treatment. The fruit was stored at 12 °C for 3 weeks and at 20 °C for the 4th week to reflect three weeks of sea shipment at the ideal temperature for storage of pummelos and an additional week of retail under ambient conditions. Neither irradiation nor storage affected juice content, organic acids, sugars, peel or pulp color and consumer sensory preference, although numerous volatiles increased in concentration as a result of irradiation treatment. Irradiation caused an immediate reduction in whole fruit and pulp firmness in ‘Chandler’ but not ‘Sarawak’ pummelos at both 150 Gy and 1000 Gy. The quality of irradiated pummelos stored at refrigerated temperature for 3 weeks was similar to untreated pummelos, however, physical handling and exposure to higher temperature resulted in increased peel pitting of irradiated fruit compared to non-treated fruit. The results suggest that irradiation could serve as a potential phytosanitary treatment for Chandler and Sarawak pummelos, provided that the fruit is subjected to minimal handling and not temperature abused
Physical Properties and Ionic Concentration of the Bovine Cervical Mucus at the Moment of Inseminating: Spontaneous Estrous and Induced Estrous
Objective of the investigation was to characterize biochemically the cervical mucus collected prior to the artificialinsemination of Holstein heifers comparing spontaneous oestrus with induced oestrus. The concentration of sodiumand potassium was determined through flame photometry, chlorine ions by Schoenfeld reaction, magnesium andcalcium was determined through colorimetry in micro plates. pH (reactive tape) and degree of crystallization (opticalmicroscope) were also evaluated. Natural estrous was detected by observing the behavior of the heifers twice a dayand by observing the characteristics of the vulva. In order to induce oestrous, an intra vaginal device was placedwith 1 gm of progesterone and 2 mg of estradiol benzoate were injected (Day 0). On day 8 the device waswithdrawn and 0-150 mg of D-Cloprostenol and 1 mg of Estradiol Cypionate were provided. 56 hours afterwithdrawal, the device was inseminated and at 60 days of pregnancy determined. The cervical mucus of heifers withspontaneous oestrus showed lower content of sodium and potassium, higher magnesium and chlorine, and biggerproportion of sodium/potassium from that obtained by induce oestrus. When comparing the pregnant with the emptyheifers, it was discovered that at the moment of insemination, the pH value and the degree of crystallization ofpregnant heifers was significantly lower, same as the concentrations of potassium and magnesium. Sodium washigher in this group. Pregnancy was always related to high ionic level generating an osmotic force that draws waterto the cervical mucus, characteristic fundamental in transport of sperms.Fil: Bernardi, S. F.. Universidad Nacional de Rosario. Facultad de Ciencias Veterinarias; ArgentinaFil: Savia, Caren Luciana. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Saavedra 15. Centro Argentino de Información Científica y Tecnológica; Argentina. Universidad Nacional de Rosario. Facultad de Ciencias Veterinarias; Argentina. Universidad Nacional de Rosario. Secretaria de Ciencia y Técnica. Centro Binacional de Investigación en Criobiología Clínica y Aplicada; ArgentinaFil: de Paz, L. J.. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Saavedra 15. Centro Argentino de Información Científica y Tecnológica; Argentina. Universidad Nacional de Rosario. Facultad de Humanidades y Artes. Secretaria de Ciencia y Técnica. Centro Binacional (Argentina- Italia) de Investigaciones en Criobiología Clínica y Aplicada; ArgentinaFil: Rodriguez, J. Universidad Nacional de Rosario. Facultad de Ciencias Veterinarias; Argentina. Universidad Nacional de Rosario. Secretaria de Ciencia y Técnica. Centro Binacional de Investigación en Criobiología Clínica y Aplicada; ArgentinaFil: Marini, Pablo Roberto. Universidad Nacional de Rosario. Facultad de Ciencias Veterinarias; Argentin
2022 Proposed base case model for eastern Atlantic and Mediterranean bluefin tuna assessment using stock synthesis.
This document presents the proposed base case for the assessment of Eastern Atlantic and Mediterranean population of bluefin tuna using Stock Synthesis in 2022. The model runs from 1950 to 2020 and was fitted to length composition data, conditional age-at-length (otolith and spines–length-age pairs), 16 fishing fleets and 11 indices of abundance. Growth is modeled by a Richards function with Linf fixed at 271 cm, K fixed at 0.23387, and the shape parameter is estimated by the model. A Beverton-Holt stock recruitment relationship was estimated in the model with the steepness and sigmaR fixed at 0.9 and 0.6, respectively. R0 is freely estimated. Although the diagnostics indicate an acceptable stability of the model, there are important conflicts between the catch information, length composition and index data. The model fits to length compositions were not good, but the model followed most of the indices fairly fine. The model results showed that the SSB decreased since 1950 until 1970s, remaining relatively stable at low values during the 1980-2009 period, and showing a sharp and steady increased since 2010. Model diagnostics indicated that the different source of data provides contradicting information about the stock, resulting in biases in the results
Evidence of Sea Level Rise At the Peruvian Coast (1942-2019)
The present work aims to analyze the variability of the sea level of the Peruvian coast with time series over a long observation period (Seventy-eight years, from 1942 to 2019). Data came from the Talara, Callao and Matarani tide gauge stations located at the north, center and south of the coast. Variations of sea level as well as air and seawater surface temperature were analyzed. Among the different scenarios studied, a sea level rise of 6.79, 4.21 and 5.16 mm/year for Talara, Callao and Matarani, respectively was found during the 1979–1997 nodal cycle. However, these results decreased significantly during the next cycle (1998–2016) until values of 1.53, 2.16 and 1.0 mm/year for Talara, Callao and Matarani, respectively. Thus, it has been demonstrated that sea level rise are highly dependent on the time interval chosen. Moreover, large interannual changes of up to 200 mm/year are observed, due to recurring phenomena, such as “El Niño”. On the other hand, the trends obtained are slightly lower than those shown by the IPCC up until 2006 but significantly higher values have been observed. Finally, the results presented herein show the necessity of a local study of the sea level variability at the coastal areas
Data and initial model set-up for the 2022 stock synthesis stock assessment of the eastern Atlantic and Mediterranean bluefin tuna.
This paper describes the data used for Stock Synthesis assessment for the Eastern Atlantic and Mediterranean bluefin tuna. The initial model configuration, fleet definitions, selectivity modeling and main parameterization are also outlined. The model runs from 1950 to 2020 and is fit to length composition data and pair age-length data treated as conditional age-at-length
Autologous stromal vascular fraction therapy for rheumatoid arthritis: rationale and clinical safety
Advancements in rheumatoid arthritis (RA) treatment protocols and introduction of targeted biological therapies have markedly improved patient outcomes, despite this, up to 50% of patients still fail to achieve a significant clinical response. In veterinary medicine, stem cell therapy in the form of autologous stromal vascular fraction (SVF) is an accepted therapeutic modality for degenerative conditions with 80% improvement and no serious treatment associated adverse events reported. Clinical translation of SVF therapy relies on confirmation of veterinary findings in targeted patient populations. Here we describe the rationale and preclinical data supporting the use of autologous SVF in treatment of RA, as well as provide 1, 3, 6, and 13 month safety outcomes in 13 RA patients treated with this approach
Synthesis of Hierarchical Dorsal Spine Ag
Silver sulfide hierarchical structures with unique dorsal spine morphology were successfully synthesized on mechanically deformed silver substrates by simple solid-vapor reactions. It has been found that it is possible to change the structures morphology by changing the reagent gas composition. The carbon monoxide (CO) presence in a reactive sulfur atmosphere was found to be the key for growing the dorsal spine structures. In all cases, the Ag2S structures grew on the edge of the silver substrates where high plastic deformation occurred
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