From Gas Sensors to Detection of Etanol Vapour to Sensor of Bacteria Detection

Introduction. Metal oxide semiconductor sensors have many advantages. But their working temperature is still high and their sensitivities are frequently low. In the current work, I present the results from investigation of sensing ability of new kind of potentiometric solid state gas sensor.Aim. The main goal of this work is investigation of the temperature dependence in the flow of air and in ethanol vapour mixture of the investigated junction structures. Also, we investigated at fixed temperature the dependence of the thermoelectric force from the ethanol vapour concentration at possible low operation temperature. For the structure, which shows the lowest operation temperature to ethanol vapour, we investigate the ability to detect Pseudomonas putida suspension.Materials and methods. In this work, the sensitivity to ethanol vapour and Pseudomonas putida suspension were investigated by measuring the thermoelectric force (the voltage) appearing of the structures by standart voltmeters.Results. Two experimental installations for sensors have been developed. The first one is for detection of ethanol vapour by ZnO/ZnO:Cu, ZnO/ZnO:CuO, ZnO/ZnO:Fe junction structures. The second installation was for Pseudomonas putida suspension detection in gas phase by ZnO/ZnO:Fe junction structure. We discovered that ZnO/ZnO:Fe structure, has the lowest operation temperature of 200 °C to ethanol vapour. For this structure, the potential difference has a negative value and decreases with increasing the amount of the pulverized bacteria.Conclusion. We discovered that ZnO/ZnO:Fe structure, has the lowest operation temperature of 200 °C. This operation temperature is a bit higher than operation temperature of at which some very novel sensing structures shows the maximum sensitivity.Introduction. Metal oxide semiconductor sensors have many advantages. But their working temperature is still high and their sensitivities are frequently low. In the current work, I present the results from investigation of sensing ability of new kind of potentiometric solid state gas sensor.Aim. The main goal of this work is investigation of the temperature dependence in the flow of air and in ethanol vapour mixture of the investigated junction structures. Also, we investigated at fixed temperature the dependence of the thermoelectric force from the ethanol vapour concentration at possible low operation temperature. For the structure, which shows the lowest operation temperature to ethanol vapour, we investigate the ability to detect Pseudomonas putida suspension.Materials and methods. In this work, the sensitivity to ethanol vapour and Pseudomonas putida suspension were investigated by measuring the thermoelectric force (the voltage) appearing of the structures by standart voltmeters.Results. Two experimental installations for sensors have been developed. The first one is for detection of ethanol vapour by ZnO/ZnO:Cu, ZnO/ZnO:CuO, ZnO/ZnO:Fe junction structures. The second installation was for Pseudomonas putida suspension detection in gas phase by ZnO/ZnO:Fe junction structure. We discovered that ZnO/ZnO:Fe structure, has the lowest operation temperature of 200 °C to ethanol vapour. For this structure, the potential difference has a negative value and decreases with increasing the amount of the pulverized bacteria.Conclusion. We discovered that ZnO/ZnO:Fe structure, has the lowest operation temperature of 200 °C. This operation temperature is a bit higher than operation temperature of at which some very novel sensing structures shows the maximum sensitivity

STUDY OF THE ROLE OF STAPHYLOCOCCUS EPIDERMIDIS IN HUMAN PATHOLOGY. THIRD REPORT: CLINIC-ETIOLOGICAL INVESTIGATION OF SEPTICAEMIAE

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STUDY ON MINIMUM INHIBITING CONCENTRATION OF ANTIBIOTICS TOWARDS STAPHYLOCOCCUS EPIDERMIDIS STRAINS ISOLATED FROM CLINICAL MATERIALS

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From Gas Sensors to Detection of Etanol Vapour to Sensor of Bacteria Detection

Introduction. Metal oxide semiconductor sensors have many advantages. But their working temperature is still high and their sensitivities are frequently low. In the current work, I present the results from investigation of sensing ability of new kind of potentiometric solid state gas sensor.Aim. The main goal of this work is investigation of the temperature dependence in the flow of air and in ethanol vapour mixture of the investigated junction structures. Also, we investigated at fixed temperature the dependence of the thermoelectric force from the ethanol vapour concentration at possible low operation temperature. For the structure, which shows the lowest operation temperature to ethanol vapour, we investigate the ability to detect Pseudomonas putida suspension.Materials and methods. In this work, the sensitivity to ethanol vapour and Pseudomonas putida suspension were investigated by measuring the thermoelectric force (the voltage) appearing of the structures by standart voltmeters.Results. Two experimental installations for sensors have been developed. The first one is for detection of ethanol vapour by ZnO/ZnO:Cu, ZnO/ZnO:CuO, ZnO/ZnO:Fe junction structures. The second installation was for Pseudomonas putida suspension detection in gas phase by ZnO/ZnO:Fe junction structure. We discovered that ZnO/ZnO:Fe structure, has the lowest operation temperature of 200 °C to ethanol vapour. For this structure, the potential difference has a negative value and decreases with increasing the amount of the pulverized bacteria.Conclusion. We discovered that ZnO/ZnO:Fe structure, has the lowest operation temperature of 200 °C. This operation temperature is a bit higher than operation temperature of at which some very novel sensing structures shows the maximum sensitivity

Publisher: Institute for Animal Husbandry, Belgrade-Zemun UDC 639.112 RABBIT PRODUCTION IN BULGARIA**

Bulgarian board of bird and rabbit meat processin

Level-scheme investigation of S-33

20th International School on Nuclear Physics, Neutron Physics and Applications -- SEP 16-22, 2013 -- Varna, BULGARIAWOS: 000346180900050An angular correlation experiment was carried out for S-33 at Laboratori Nazionali di Legnaro with the gamma-ray detector array GASP. The reaction used was Mg-24(N-14,alpha p)S-33 at a beam energy of 40MeV. An analysis of DCO ratios and triple gamma coincidences was performed. So far, a new level depopulated by 3 gamma -ray transitions has been found and its spin was determined. The work for further extension of the level scheme is in progress.Bulgarian Acad Sci, Inst Nucl Res & Nucl Energy, Bulgarian Nucl Regulatory Agcy, Joint Inst Nucl Res, Bogoliubov Lab Theoret Phys, Bulgarian Minist Educ Youth & SciBulgarian Science Fund [DFNI-E01/2]; Bulgarian Ministry of Education and ScienceThis research has been supported by Bulgarian Science Fund under contract DFNI-E01/2 and by a NUPNET - NEDENSAA project funded by the Bulgarian Ministry of Education and Science

Electromagnetic transition strengths in S-33

20th International School on Nuclear Physics, Neutron Physics and Applications -- SEP 16-22, 2013 -- Varna, BULGARIAWOS: 000346180900049An experiment using the Doppler Shift Attenuation Method was performed for S-33 at Laboratori Nazionali di Legnaro using the multi-detector array GASP. Excited states were populated in the fusion-evaporation reaction Mg-24(N-14, alpha p)(33) S. The data were analyzed using the Differential Decay Curve Method with gates set on the shifted component of a directly feeding transition thus eliminating the problem of the unobserved feeding. Reliable and precise lifetimes were determined and the data derived for the reduced transition probabilities are going to be compared to the predictions of shell model calculations.Bulgarian Acad Sci, Inst Nucl Res & Nucl Energy, Bulgarian Nucl Regulatory Agcy, Joint Inst Nucl Res, Bogoliubov Lab Theoret Phys, Bulgarian Minist Educ Youth & SciBulgarian Science Fund [DFNI-E 01/2]; Bulgarian Ministry of Education and Science.This research has been supported by Bulgarian Science Fund under contract DFNI-E 01/2 and by a NUPNET - NEDENSAA project funded by the Bulgarian Ministry of Education and Science

145Ba^{145}\mathrm{Ba} β−{{\beta}}^{{-}} decay: Excited states and half-lives in neutron-rich 145La^{145}\mathrm{La}

International audienceBackground: Neutron-rich nuclei in the A≈140–160 mass region provide valuable information on nuclear structure such as quadrupole- and octupole-shape coexistence and the evolution of the collectivity. These nuclei have also a nuclear engineering interest because they contribute to the total decay heat after a fission burst. The information concerning La145 is very limited.Purpose: The study of low-spin states in La145 will provide a more detailed level scheme and enable the determination of the half-lives of the excited states.Methods: Low-spin excited states in La145 have been investigated from the Ba145β− decay. The Ba145 nuclei were directly produced by photofission in the ALTO facility or obtained from the β− decay of Cs145 also produced by photofission. Gamma spectroscopy and fast-timing techniques were used.Results: A new level scheme was proposed including 67 excited levels up to about 3 MeV and 164 transitions. Half-lives in the few-nanosecond range were measured for the first excited states. Configurations for levels up to ≈600 keV were discussed.Conclusions: The available information on the low-spin states of La145 has been modified and considerably extended. The analysis of the properties of the first excited states, such as excitation energies, decay modes, log ft values, reduced transition probabilities, and Weisskopf hindrance factors, has enabled the identification of the first members of the bands corresponding to the g7/2, d5/2, and h11/2 proton configurations

Electromagnetic transition strengths in33S

An experiment using the Doppler Shift Attenuation Method was performed for S-33 at Laboratori Nazionali di Legnaro using the multi-detector array GASP. Excited states were populated in the fusion-evaporation reaction Mg-24(N-14, alpha p)(33) S. The data were analyzed using the Differential Decay Curve Method with gates set on the shifted component of a directly feeding transition thus eliminating the problem of the unobserved feeding. Reliable and precise lifetimes were determined and the data derived for the reduced transition probabilities are going to be compared to the predictions of shell model calculations

High-spin states and lifetimes in S-33 and shell-model interpretation in the sd-fp space

WOS: 000407994600003The structure of the S-33 nucleus was investigated in the Mg-24(N-14, alpha p) fusion-evaporation reaction using a 40-MeV N-14 beam. The level scheme was extended up to an excitation energy of 11.7 MeV and spin 19/2+. Lifetimes of the intermediate-and high-spin states have been investigated by the Doppler shift attenuation method. Data were compared with different shell-model calculations where effective interactions involving two main shells, the sd and the fp, are used.Bulgarian Science Fund [DN08/6]; program for support of young scientists, Bulgarian Academy of Sciences [DFNP 48]Authors are thankful to the XTU Tandem staff of Laboratori Nazionali di Legnaro for the good quality delivered beam. This research was supported by Bulgarian Science Fund under Contract No. DN08/6 and by the program for support of young scientists, Bulgarian Academy of Sciences under Contract No. DFNP 48