ABSTRACT
The newly established Ionizing Radiation Metrology Laboratory of the National Metrology Institute (FTMC) in Lithuania organized four comparisons in the field of low-level radioactivity measurements in water. For gamma-ray emitters, the activity concentration in the samples was in the range 1-25Bq/kg, while for tritium it was around 2Bq/g. The assigned values of all comparisons were traceable to the primary standards of the Czech Metrology Institute (CMI).
ABSTRACT
The quality control procedures used for two HPGe detectors (a well-type and a GAMMA-X coaxial) are described. Since 2001, check sources containing (137)Cs have been measured weekly for 7200s each, and the gamma-ray spectrometry system background was determined once per month for an acquisition time of 100,000 s. The laboratory participated in the international comparisons at environmental radioactivity level organized by the IAEA, Risø National Laboratory and NPL.
ABSTRACT
UNLABELLED: The aim--to study the dynamics content of VEGF-A, VEGF-R1, EGF and EGF-R1 in liver and spleen tissues from rats at different stages of liver metastases. MATERIALS AND METHODS: We have designed a model of liver metastases in male rats. The content of growth factors was examined by ELISA at 1, 2 and 5 weeks of carcinogenesis in tissue of liver and tumors of spleen. RESULTS: The content of growth factors increased in liver tissue at different stages of metastasis. The concentration of VEGF-A increased gradually from the 1st to 5th week carcinogenesis. The concentration of VEGF-R1 increased after 2 weeks and decreased slightly after 5 weeks of carcinogenesis. The level of all components of EGF/EGF-R1 increased after 2 weeks of carcinogenesis. CONCLUSION: The following pathogenetic aspects of liver metastasis were defined: change in levels of VEGF-A/VEGF-R1 indicating the progressive development of the process of neoangiogenesis, and increased levels of EGF/EGF-R1 responsible for metastasis processes.
Subject(s)
Intercellular Signaling Peptides and Proteins/metabolism , Liver Neoplasms, Experimental/secondary , Liver/blood supply , Neovascularization, Pathologic/metabolism , Splenic Neoplasms/pathology , Animals , Cell Line, Tumor , Epidermal Growth Factor/metabolism , ErbB Receptors/metabolism , Liver/metabolism , Liver/pathology , Liver Neoplasms, Experimental/blood supply , Liver Neoplasms, Experimental/metabolism , Male , Neoplasm Transplantation , Rats , Receptors, Vascular Endothelial Growth Factor/metabolism , Spleen/blood supply , Spleen/metabolism , Spleen/pathology , Splenic Neoplasms/blood supply , Vascular Endothelial Growth Factor A/metabolismABSTRACT
Two aerosol sampling stations in Lithuania were simultaneously used for assessing consequences of the accident at the Fukushima Dai-ichi nuclear power plant. The maximum activity concentrations of (129 m)Te, (131)I, (134)Cs and (137)Cs were 0.59 ± 0.06, 3.5 ± 0.3, 0.90 ± 0.08, 0.90 ± 0.07 mBq m(-3) at station #1 in Vilnius, and 0.29 ± 0.03, 1.0 ± 0.1, 0.41 ± 0.04, 0.41 ± 0.0 4 mBq m(-3) at station #2 in northeastern part of Lithuania, respectively.
Subject(s)
Air Pollutants, Radioactive/analysis , Fukushima Nuclear Accident , Radiation Monitoring/instrumentation , Radioactive Fallout/analysis , Radioisotopes/analysis , Spectrometry, Gamma/instrumentation , Ultrafiltration/instrumentation , Aerosols/chemistry , Aerosols/isolation & purification , Japan , Lithuania , Oceans and Seas , Radiation Monitoring/methods , Spectrometry, Gamma/methodsSubject(s)
Abdominal Muscles , Appendicitis/diagnosis , Thermography/methods , Acute Disease , Adolescent , Adult , Aged , Appendicitis/pathology , Diagnostic Errors , Female , Humans , Male , Middle AgedABSTRACT
The method of Lowry as modified by Peterson (who had changed concentrations of reagents and added a new reagent, sodium dodecyl sulfate) has been tested. It has been shown that the modified method can be applied for rapid measurement of protein in the suspension of bacterial cells. The effect of the following compounds on the protein estimation by the modified method in bovine serum albumin has been studied: potassium chloride, potassium phosphate, sucrose, EDTA, tris, ammonium acetate, Triton X-100, tyrosine, phenol, glycerol, 2-mercaptoethanol.
