Improving yield mapping accuracy using remote sensing

The objective of this work was to investigate the use of remotely sensed vegetation indices to improve the quality of yield maps. The method was applied to the yield data of twelve cornfields from the Data Intensive Farm Management project. The results revealed the need to time shift the yield values up to three seconds to better match the sensor readings with the geographic coordinates. The residuals of the yield prediction model were used to identify points with unlikely yield values for that location, as an alternative to traditional approaches using local spatial statistics, without any assumption of spatial dependence or stationarity. The temporal and spatial distribution of the standardized coefficients for each experimental unit highlighted the presence of trends in the data. At least five out of the twelve fields presented trends that could have been induced by data collection.Ope

Preliminary chemico-biological studies on Ru(III) compounds with S-methyl pyrrolidine/dimethyl dithiocarbamate

[RuCl(3)center dot nH(2)O] and Na(trans-[RuCl(4)(DMSO)(2)])D were reacted with 1-pyrrolidinedithiocarbamate (PDT). its S-rnethyl ester (PDTM), and N,N-dimethylcarbamodithioic acid methyl ester (DMDTM) in water or methanol in order to obtain the corresponding Ru(III) derivatives. Once isolated and purified, the complexes were characterized by means of elemental analysis, conductivity measurements, FT-IR and (1)H NMR spectroscopy, ion electrospray mass spectrometry (ESI-MS), and thermal analyses. The crystal structure of mer-[Ru(DMDTM)(DMSO)Cl(3)] has been also determined by X-ray crystallography. In vitro cytotoxic activity of all the synthesized complexes was eventually evaluated on some selected human tumor cell lines

NTPDase activity of lymphocytes in contact dermatitis before and after treatment with nanostructured dexamethasone

Foi estudada a hidrólise de nucleotídeos da adenina pela NTPDase em linfócitos de ratos Wistar com dermatite induzida por sulfato de níquel, antes e após tratamento com dexametasona livre e nanoestruturada. Os dois tipos de tratamento também foram avaliados por análise histopatológica e morfométrica. A atividade enzimática média do grupo com dermatite de contato foi significativamente maior em relação ao grupo controle (P<0,001). A hidrólise do ATP e do ADP nos grupos tratado com dexametasona livre e nanoestruturada foi significativamente maior em relação ao grupo controle (P < 0,001). Não se observou aumento estatisticamente significativo na hidrólise de ADP e ATP, entre os grupos tratados com dexametasona nanoestruturada ou livre. Houve um maior grau de atrofia da pele no grupo tratado com dexametasona nanoestruturada sugerindo ter este, efeito imunossupressor maior. O aumento na atividade da NTPDase, provavelmente ocorreu por mecanismos compensatórios, devido a inibição da proliferação dos linfócitos pela dexametasona, indicando alteração pela resposta imune.The hydrolysis of adenine nucleotides by NTPDase was studied in lymphocytes of Wistar rats with experimental nickel-sulphate induced dermatitis, before and after treatment with free and nanostructured dexamethasone. Both treatments were also evaluated by histopathological and morphometric analysis. The mean enzymatic activity of the contact dermatitis group was significantly greater compared to the control group (P < 0.001). ATP and ADP hydrolysis were significantly greater in the free and nanostructured treatment groups when compared to the control group (P < 0.001). ADP and ATP hydrolysis were not statistically significant different between the two treatment groups. The group treated with nanostructured dexamethasone showed greater skin atrophy, suggesting that this treatment has a greater immunosuppressant effect. The increase in NTPDase activity probably occurred through compensatory mechanisms, due to inhibition of lymphocyte proliferation by dexmethasone, indicating an alteration in the immune response.Colegio de Farmacéuticos de la Provincia de Buenos Aire