Results of the Austrian-Ceylonese hydrobiological mission 1970 of the 1st Zoological Institute of the University of Vienna (Austria) and the Department of Zoology of the Vidyalankara University of Ceylon, Kelaniya. Pt. 10. Freshwater triclads (Turbellaria, Tricladida) from Ceylon

The collection of Triclads from the Austrian-Ceylonese hydrobiological mission originates from 23 streams in the mountains of the south of Sri Lanka. All collected animals are of the Dugesia gonocephala (Dug.) type. Unfortunately the determinable mature animals were very rare in the samples but it seems certain that all the Triclads, found by the mission, belong to Dugesia nannophallus, described by Ball in 1970 after two individuals from Dunhinda, Badulla (Prov. Uva, Sri Lanka)

FREEZING AND SHELF LIFE OF SWEET POTATO AND CITRON BARS

FREEZING AND SHELF LIFE OF SWEET POTATO AND CITRON BAR

CANNING AND QUALITY EVALUATION OF SWEET POTATO DESSERT

CANNING AND QUALITY EVALUATION OF SWEET POTATO DESSER

Productos congelados de pollo

From 1987 to 1990 Puerto Rico imported an average of 148 million pounds of chicken per year. Even though local poultry production has been steadily increasing, there is still need to replace imports with locally elaborated products. To provide alternatives that can be used to diversify and increase local poultry production, we developed convenience frozen products: fricassee, patties, nuggets, rolls, uncooked and precooked breaded breast fillets and baked chicken in cream sauce. The sensory parameters measured included appearance, flavor, texture and overall acceptability. All samples were evaluated for up to 6-month frozen storage. Results indicated that all products developed were highly rated by the taste panel. This finding suggests that there is a market potential for the developed products. A quality shelf-life of at least 6 months should prove adequate to provide enough room for successful marketing. Since these products were formulated as prime quality foods, ingredient substitution or omission to lower production cost could be considered by whoever produces these products commercially if such cost reduction is desired.De 1987 a 1990 Puerto Rico importó un promedio de 148 millones de libras de pollo por año. Aunque la producción local de pollos ha estado aumentando constantemente, se hace necesario substituir importaciones con productos elaborados localmente. A manera de proveer alternativas que puedan utilizarse para diversifiar y expandir la producción local de pollos, se desarrollaron varios productos congelados. Éstos incluyeron fricasé, hamburguesas ("patties"), "nuggets", pastelón enrollado, filetes de pechuga empanados crudos y precocidos y pollo asado en salsa cremosa. Los resultados obtenidos indicaron que todos los productos desarrollados fueron considerados del gusto del panel de catadores, los parámetros sensoriales evaluados incluyeron apariencia, sabor, textura y aceptabilidad general. Todas las muestras se evaluaron por hasta 6 meses de almacenaje congelado. Estos resultados señalan el buen potencial de mercadeo de estos productos. Una durabilidad en almacenaje de por lo menos 6 meses sin que se pierda calidad debe ser adecuada para proveer suficiente tiempo para un buen mercadeo. Debido a que estos productos fueron formulados como alimentos de alta calidad, quien los vaya a producir comercialmente podría considerar substituir u omitir ingredientes a manera de reducir los costos de producción según las exigencias del mercado

Spectroscopic confirmation of UV-bright white dwarfs from the Sandage Two-Color Survey of the Galactic Plane

We present spectroscopic observations confirming the identification of hot white dwarfs among UV-bright sources from the Sandage Two-color Survey of the Galactic plane and listed in the Lanning (Lan) catalog of such sources. A subsample of 213 UV bright Lan sources have been identified as candidate white dwarfs based on the detection of a significant proper motion. Spectroscopic observations of 46 candidates with the KPNO 2.1m telescope confirm 30 sources to be hydrogen white dwarfs with subtypes in the DA1-DA6 range, and with one of the stars (Lan 161) having an unresolved M dwarf as a companion. Five more sources are confirmed to be helium white dwarfs, with subtypes from DB3 to DB6. One source (Lan 364) is identified as a DZ 3 white dwarf, with strong lines of calcium. Three more stars are found to have featureless spectra (to within detection limits), and are thus classified as DC white dwarfs. In addition, three sources are found to be hot subdwarfs: Lan 20 and Lan 480 are classified as sdOB, and Lan 432 is classified sdB. The remaining four objects are found to be field F star interlopers. Physical parameters of the DA and DB white dwarfs are derived from model fits.Comment: To appear in the Astronomical Journa

Spatial representativeness of an air quality monitoring station. Application to NO2 in urban areas

International audienceThe present study aims at setting up a geostatistical methodology that could be implemented in an operational context to assess the spatial representativeness of a measurement station. In the proposed definition, a point is considered as belonging to the area of representativeness of a station if its concentration differs from the station measurement by less than a given threshold. Additional criteria related to distance or environmental characteristics may also be introduced. Concentrations are first estimated at each point of the domain applying kriging techniques to passive sampling data obtained from measurement surveys. The standard deviation of the estimation error is then used, making a hypothesis on the error distribution, to select the points, at a fixed risk, where the difference of concentration with respect to the station is below the threshold. The methodology is then applied to NO2 experimental datasets for different French cities

Co-incorporation of biodegradable wastes with crop residues to reduce nitrate pollution of groundwater and decrease waste disposal to landfill

Return of high nitrogen (N) content crop residues to soil, particularly in autumn, can result in environmental pollution resulting from gaseous and leaching losses of N. The EU Landfill Directive will require significant reductions in the amounts of biodegradable materials going to landfill. A field experiment was set up to examine the potential of using biodegradable waste materials to manipulate losses of N from high N crop residues in the soil. Leafy residues of sugar beet were co-incorporated into soil with materials of varying C:N ratios, including molasses, compactor waste, paper waste, green waste compost and cereal straw. The amendment materials were each incorporated to provide approximately 3.7 t C per hectare. The most effective material for reducing nitrous oxide (N2O) production and leaching loss of NO3− was compactor waste, which is the final product from the recycling of cardboard. Adding molasses increased N2O and NO3− leaching losses. Six months following incorporation of residues, the double rate application of compactor waste decreased soil mineral N by 36 kg N per hectare, and the molasses increased soil mineral N by 47 kg N per hectare. Compactor waste reduced spring barley grain yield by 73% in the first of years following incorporation, with smaller losses at the second harvest. At the first harvest, molasses and paper waste increased yields of spring barley by 20 and 10% compared with sugar beet residues alone, and the enhanced yield persisted to the second harvest. The amounts of soil mineral N in the spring and subsequent yields of a first cereal crop were significantly correlated to the lignin and cellulose contents of the amendment materials. Yield was reduced by 0.3–0.4 t/ha for every 100 mg/g increase in cellulose or lignin content. In a second year, cereal yield was still reduced and related to the cellulose content of the amendment materials but with one quarter of the effect. Additional fertilizer applied to this second crop did not relieve this effect. Although amendment materials were promising as tools to reduce N losses, further work is needed to reduce the negative effects on subsequent crops which was not removed by applying 60 kg/ha of fertilizer N

YIELD AND ACCEPTABILITY OF EIGHT FRESH MARKET TOMATO CULTIVARS

YIELD AND ACCEPTABILITY OF EIGHT FRESH MARKET TOMATO CULTIVAR

TRICLADES TERRICOLES, TRICLADES PALUDICOLES, NEMERTIEN communiques par Ie Musee ZooIogique de Buitenzorg

ABSTRACT NOT AVAILABL