The effect of pro-ecological procedures and insect foraging on the total content of phenol compounds in winter wheat

In laboratory conditions, the effect of pro-ecological procedures (application of effective microorganisms and Asahi SL biostimulator) and foraging by insects [cereal leaf beetle (Oulema melanopa L.) and bird cherry-oat aphid (Rhopalosiphum padi (L.)] on the total content of phenolic compounds in winter wheat, was studied. Correlations between the total content of phenolic compounds (determined by the Folin-Ciocalteau colorimetric method) expressed as the amount of pyrogallol in wheat plants: undamaged, damaged by O. melanopa, damaged by R. padi, the length of feeding scar left by cereal leaf beetle and the number of pricks made by actively feeding insects of bird cherry-oat aphid were analysed. The wheat was treated by EM inoculant and a biostimulator. The mode of application of the preparations used had a significant effect on level the total phenolic compounds in the undamaged wheat and the wheat exposed to foraging by the above-mentioned insects. The plants not exposed to insects foraging contained greater amounts of phenolic compounds than those exposed to the insects. The correlation between the total content of phenols in the wheat damaged by the insects in the ‘no-choice’ conditions, proved insignificant

Very high grass pollen in the air of selected Polish cities in 2011 : prelimary report

Praca przedstawia wstępną analizę przebiegu sezonu pylenia traw w wybranych punktach pomiarowych w Polsce w 2011 roku. Badania prowadzono metodą objętościową przy wykorzystaniu aparatów firmy Burkard i Lanzoni. W 2011 roku zaobserwowano zwiększone nasilenie objawów chorobowych u osób z nadwrażliwością na alergeny pyłku traw. Sezon pylenia traw w 2011 roku charakteryzował się długimi ciągami dni z wysokim i bardzo wysokim stężeniem ich pyłku, co przełożyło się na większe nasilenie objawów chorobowych u osób uczulonych na alergeny pyłku traw.The paper presents preliminary analysis of grass pollen season of 2011 in selected measuring sites in Poland. The season was characterised by very intensive allergy symptoms in patients suffering from grass pollen allergens. Many days with high and very high pollen counts very noted

Mechanical thrombectomy in acute stroke – Five years of experience in Poland

Objectives Mechanical thrombectomy (MT) is not reimbursed by the Polish public health system. We present a description of 5 years of experience with MT in acute stroke in Comprehensive Stroke Centers (CSCs) in Poland. Methods and results We retrospectively analyzed the results of a structured questionnaire from 23 out of 25 identified CSCs and 22 data sets that include 61 clinical, radiological and outcome measures. Results Most of the CSCs (74%) were founded at University Hospitals and most (65.2%) work round the clock. In 78.3% of them, the working teams are composed of neurologists and neuro-radiologists. All CSCs perform CT and angio-CT before MT. In total 586 patients were subjected to MT and data from 531 of them were analyzed. Mean time laps from stroke onset to groin puncture was 250±99min. 90.3% of the studied patients had MT within 6h from stroke onset; 59.3% of them were treated with IV rt-PA prior to MT; 15.1% had IA rt-PA during MT and 4.7% – emergent stenting of a large vessel. M1 of MCA was occluded in 47.8% of cases. The Solitaire device was used in 53% of cases. Successful recanalization (TICI2b–TICI3) was achieved in 64.6% of cases and 53.4% of patients did not experience hemorrhagic transformation. Clinical improvement on discharge was noticed in 53.7% of cases, futile recanalization – in 30.7%, mRS of 0–2 – in 31.4% and mRS of 6 in 22% of cases. Conclusion Our results can help harmonize standards for MT in Poland according to international guidelines

Robust estimation of bacterial cell count from optical density

Optical density (OD) is widely used to estimate the density of cells in liquid culture, but cannot be compared between instruments without a standardized calibration protocol and is challenging to relate to actual cell count. We address this with an interlaboratory study comparing three simple, low-cost, and highly accessible OD calibration protocols across 244 laboratories, applied to eight strains of constitutive GFP-expressing E. coli. Based on our results, we recommend calibrating OD to estimated cell count using serial dilution of silica microspheres, which produces highly precise calibration (95.5% of residuals <1.2-fold), is easily assessed for quality control, also assesses instrument effective linear range, and can be combined with fluorescence calibration to obtain units of Molecules of Equivalent Fluorescein (MEFL) per cell, allowing direct comparison and data fusion with flow cytometry measurements: in our study, fluorescence per cell measurements showed only a 1.07-fold mean difference between plate reader and flow cytometry data

Electromagnetic imaging of axisymmetric scatterers.

Radar cross-section is a key element of low-observability. In order to reduce the cross-section of a particular platform, it may be necessary to determine the induced source distribution on the platform which produces the scattered electromagnetic radiation. Determining the distribution may be possible using a probe to measure fields on or near the outer surface of the object. However, the act of measuring may indeed influence the currents being measured. An alternate method is to back-propagate measurements made at distances beyond the realm of strong influence on the parameters of interest to construct visualizations of the local on-surface radiation contributions. This has been demonstrated for the case of cylindrical geometry. The theory is extended in this thesis to axisymmetric bodies for the special case of rotationally symmetric fieldshttp://archive.org/details/electromagnetici00wawrMajor, United States Marine CorpsApproved for public release; distribution is unlimited

Research of vibration asymmetry of fluidic oscillator with vortex chambers

The paper presents an analysis of the test results of a new type of fluidic oscillator. The oscillator design is based on the internal feedback in the form of two vortex chambers. The results were transformed into a dimensionless form. Then, the effect of deliberately introduced asymmetry into one of two input channels of the feedback chambers on the device oscillation asymmetry was examined