Development of plastic scintillation detector (PSD) systems for dosimetry has been evolving for two decades now. The subject area has been a topic of a keen research interest that has generated lot of publications lately. PSD systems are being introduced in the market place. Numerous PSD systems for External Beam Radiation Therapy and Brachytherapy have been proposed, most times differentiating from the original systems by slight changes in one or more components, such as the photodetector. However, few major technological and engineering innovations have enabled this new technology to be embraced by the community which helped launching these systems for commercialization (Standard Imaging, Radiadyne, etc.). Scintillation materials (plastic, scintillating fibers and liquid) have many properties that make them ideal for dosimetry including water equivalence and energy independence for MV photons, linearity with dose, dose rate independence, high spatial resolution and nanosecond fast response time.
The Tri-Carb 4910TR liquid scintillation counter provides the popular standard features needed for research applications and the versatility to expand for environmental analysis with the optional ultralow-level and alpha/beta discrimination features.. The Tri-Carb 4910TR liquid scintillation counter provides high performance and flexibility for multi-application and multi-user laboratories detecting radioactivity in life science research, environmental monitoring and/or health physics assays. Optional Packages are available for High Sensitivity Counting of low activity samples and Alpha Beta Separation for unknown or mixed samples.. Exclusive Standard Features. ...
SPA Scintillation beads are microspheres containing scintillant which emit light in the blue region of the visible spectrum. As a result, these beads are ideally suited to use with photomultiplier tube (PMT) counters such as the MicroBeta2 or TopCount.. Two types of core SPA Scintillation bead are available - yttrium silicate (YSi) and Polyvinyltoluene (PVT). PVT beads are plastic, larger in size, and stay in suspension longer than the crystalline YSi beads.. Scintillation proximity assay (SPA) is a homogeneous and versatile technology for the rapid and sensitive assay of a wide range of biological processes, including applications using enzyme and receptor targets, radioimmunoassays, and molecular interactions. When 3H, 14C, 33P, and 125I radioisotopes decay, they release β-particles (or Auger electrons, in the case of 125I). The distance these particles travel through an aqueous solution is dependent on the energy of the particle. If a radioactive molecule is held in close enough proximity to ...
SPA Scintillation beads are microspheres containing scintillant which emit light in the blue region of the visible spectrum. As a result, these beads are ideally suited to use with photomultiplier tube (PMT) counters such as the MicroBeta2 or TopCount.. Two types of core SPA Scintillation bead are available - yttrium silicate (YSi) and Polyvinyltoluene (PVT). PVT beads are plastic, larger in size, and stay in suspension longer than the crystalline YSi beads.. Scintillation proximity assay (SPA) is a homogeneous and versatile technology for the rapid and sensitive assay of a wide range of biological processes, including applications using enzyme and receptor targets, radioimmunoassays, and molecular interactions. When 3H, 14C, 33P, and 125I radioisotopes decay, they release β-particles (or Auger electrons, in the case of 125I). The distance these particles travel through an aqueous solution is dependent on the energy of the particle. If a radioactive molecule is held in close enough proximity to ...
SPA Scintillation beads are microspheres containing scintillant which emit light in the blue region of the visible spectrum. As a result, these beads are ideally suited to use with photomultiplier tube (PMT) counters such as the MicroBeta2 or TopCount.. Two types of core SPA Scintillation bead are available - yttrium silicate (YSi) and Polyvinyltoluene (PVT). PVT beads are plastic, larger in size, and stay in suspension longer than the crystalline YSi beads.. Scintillation proximity assay (SPA) is a homogeneous and versatile technology for the rapid and sensitive assay of a wide range of biological processes, including applications using enzyme and receptor targets, radioimmunoassays, and molecular interactions. When 3H, 14C, 33P, and 125I radioisotopes decay, they release β-particles (or Auger electrons, in the case of 125I). The distance these particles travel through an aqueous solution is dependent on the energy of the particle. If a radioactive molecule is held in close enough proximity to ...
SPA Scintillation beads are microspheres containing scintillant which emit light in the blue region of the visible spectrum. As a result, these beads are ideally suited to use with photomultiplier tube (PMT) counters such as the MicroBeta2 or TopCount.. Two types of core SPA Scintillation bead are available - yttrium silicate (YSi) and Polyvinyltoluene (PVT). PVT beads are plastic, larger in size, and stay in suspension longer than the crystalline YSi beads.. Scintillation proximity assay (SPA) is a homogeneous and versatile technology for the rapid and sensitive assay of a wide range of biological processes, including applications using enzyme and receptor targets, radioimmunoassays, and molecular interactions. When 3H, 14C, 33P, and 125I radioisotopes decay, they release β-particles (or Auger electrons, in the case of 125I). The distance these particles travel through an aqueous solution is dependent on the energy of the particle. If a radioactive molecule is held in close enough proximity to ...
SPA Imaging beads are microspheres containing scintillant which emit light in the red region of the visible spectrum. As a result, these beads are ideally suited to use with a CCD imager, such as PerkinElmerlj Viewlux™ CCD Imager.. Two types of core SPA Imaging bead are available - yttrium oxide (YOx) and Polystyrene (PS). A number of biological coatings also exist for each core bead type to enable receptor binding, enzyme, molecular interaction and radioimmunoassays to be investigated.. Scintillation proximity assay (SPA) is a homogeneous and versatile technology for the rapid and sensitive assay of a wide range of biological processes, including applications using enzyme and receptor targets, radioimmunoassays, and molecular interactions. When 3H, 14C, 33P, and 125I radioisotopes decay, they release β-particles (or Auger electrons, in the case of 125I). The distance these particles travel through an aqueous solution is dependent on the energy of the particle. If a radioactive molecule is ...
SPA Imaging beads are microspheres containing scintillant which emit light in the red region of the visible spectrum. As a result, these beads are ideally suited to use with a CCD imager, such as PerkinElmerlj Viewlux™ CCD Imager.. Two types of core SPA Imaging bead are available - yttrium oxide (YOx) and Polystyrene (PS). A number of biological coatings also exist for each core bead type to enable receptor binding, enzyme, molecular interaction and radioimmunoassays to be investigated.. Scintillation proximity assay (SPA) is a homogeneous and versatile technology for the rapid and sensitive assay of a wide range of biological processes, including applications using enzyme and receptor targets, radioimmunoassays, and molecular interactions. When 3H, 14C, 33P, and 125I radioisotopes decay, they release β-particles (or Auger electrons, in the case of 125I). The distance these particles travel through an aqueous solution is dependent on the energy of the particle. If a radioactive molecule is ...
Levocabastine is an antiallergic drug acting as a histamine H1-receptor antagonist. In allergic conjunctivitis (AC), it may also antagonize up-regulation of the intercellular adhesion molecule-1 (ICAM-1) expressed on epithelial conjunctival cells. However, little is known about its effects on eosinophils, important effector cells in AC. The adhesion molecule integrin alpha(4)beta(1) is expressed in eosinophils; it interacts with the vascular cell adhesion molecule-1 (VCAM-1) and fibronectin (FN) in vascular endothelial cells and contributes to eosinophil activation and infiltration in AC. This study provides evidence that in a scintillation proximity assay levocabastine (IC(50) 406 microM), but not the first-generation antihistamine chlorpheniramine, displaced (125)I-FN binding to human integrin alpha(4)beta(1) and, in flow cytometry analysis, levocabastine antagonized the binding of a primary antibody to integrin alpha(4) expressed on the Jurkat cell surface. Levocabastine, but not ...
div class=citation vocab=http://schema.org/,,i class=fa fa-external-link-square fa-fw,,/i, Data from ,span resource=http://link.libraries.ou.edu/portal/A-scintillation-counter-for-measurement-of-I131/gO1eaNur4-s/ typeof=Book http://bibfra.me/vocab/lite/Item,,span property=name http://bibfra.me/vocab/lite/label,,a href=http://link.libraries.ou.edu/portal/A-scintillation-counter-for-measurement-of-I131/gO1eaNur4-s/,A scintillation counter for measurement of I131 uptake in the thyroid gland, by William J. MacIntyre, (electronic resource),/a,,/span, - ,span property=potentialAction typeOf=OrganizeAction,,span property=agent typeof=LibrarySystem http://library.link/vocab/LibrarySystem resource=http://link.libraries.ou.edu/,,span property=name http://bibfra.me/vocab/lite/label,,a property=url href=http://link.libraries.ou.edu/,University of Oklahoma Libraries,/a,,/span,,/span,,/span,,/span,,/div ...
The second type of radiation detector we will discuss is called the scintillation detector. Scintillations are minute flashes of light which are produced by certain materials when they absorb radiation. These materials are variously called fluorescent materials, fluors, scintillators or phosphors.. If we had a radioactive source and a scintillator in the lab we could darken the room, move the scintillator close to the source and see the scintillations. These small flashes of light might be green or blue or some other colour depending on the scintillator. We could also count the number of flashes produced to gain an estimate of the radioactivity of the source, that is the more flashes of light seen the more radiation present.. The scintillation detector was possibly the first radiation detector discovered. You might have heard the story of the discovery of X-rays by Wilhelm Roentgen in 1895. He was working one evening in his laboratory in Wurzburg, Germany with a device which fired a beam of ...
0039] Hence, devices useful for dosimetry of a broad range of complex radiotherapy modalities, such as intensity-modulated proton therapy ("IMPT") for proton therapy, using liquid scintillator detectors are provided herein. The systems presented herein may be useful for patient-specific quality assurance ("QA"), providing fast, accurate, and high-resolution dosimetry. These systems may provide real-time dosimetric information in both 2D planes and 3D volumes for radiation beams of either photons or protons. The radiation beam is interacting with the LS material to produce visible light. This light may be acquired in realtime with one or more high-sensitivity/high-speed CCD cameras. (As used herein, "processing in near realtime" or "realtime" generally refer to processing data without intentional delay, given the limitations of the system and the time required to accurately measure the data.) Processing these images in near realtime allow the characterization of the radiation beams. (As used ...
It was the purpose of this experiment to examine the difference in the density determinations and, since the Geiger tube threshold is much lower, to calibrate the liquid scintillator so that it is capable to determining the absolute particle density with greater accuracy.
We have studied the calibration of PMTs in scintillation detectors, inducing single electron response on the PMT from primary scintillation produced by x-ray interaction. The results agree with those obtained by the commonly used single electron response (SER) method, which uses LED light pulses to induce the PMT SER. The use of the primary scintillation for PMT calibration will be convenient in situations where the PMT is already in situ, when it becomes difficult or even impossible to apply the SER method, e.g. in commercial sealed scintillator/PMT devices. Furthermore, we have experimentally investigated the possibility of fitting the high-charge tail of the PMT SER pulse-height distribution to an exponential function, inferring the PMT gain from the inverse of the exponent. The results of the exponential fit method agree with those obtained by the SER method for pulse-height distributions resulting from an average number of around 1.0 photoelectrons reaching the first dynode per ...
FlashPlate® is a white polystyrene microplate, designed for high-volume, homogeneous radiometric assays, based upon the principle of scintillation proximity. The interior of each well is permanently coated with a thin layer of polystyrene-based scintillant which provides a platform for non-separation assays using a variety of isotopes (e.g.,3H, 125I, 14C and 33P) without the addition of liquid scintillation cocktail. FlashPlate is available in both 96-well and 384-well formats.. ...
A radiation detector, in particular a gamma camera, is constructed and operated in such a fashion that only a predetermined number of light sensors (such as PMTs) adjoining each other in a cluster are used to generate a signal with amplitude and event position information. The camera may also use an array of individual scintillation elements (crystals) in place of a single crystal, with certain advantages obtained thereby. According to another aspect of the invention, there is a reflector sheet that defines an array of apertures through which scintillation light can pass from the scintillation crystal to a plurality of light sensors optically coupled to an optical window in an array corresponding to the array of apertures in the reflector.
Definition of scintillation camera in the Legal Dictionary - by Free online English dictionary and encyclopedia. What is scintillation camera? Meaning of scintillation camera as a legal term. What does scintillation camera mean in law?
Tritium is usually measured by using a liquid scintillation counter. However, liquid scintillator used for measurement will become radioactive waste fluid. To solve this issue, we have developed a method of measuring tritium samples with plasma-treated plastic scintillator (PS)sheets (Plasma method). The radioactive sample is held between 2 PS sheets and the whole is enclosed in a a low-potassium glass vial. With the Plasma method of 2-min plasma treatment, we have obtained measurement efficiency of 48 ± 2 % for 2 min measurement of tritium except for tritiated water. The plasma treatment makes the PS surface rough and hydrophilic which contributes to improve the contact between tritium and PS. On the other hand, it needed almost 6 hours to obtain constant measurement efficiency. The reason was that the dry-up handling in the vial needed longer time to vaporize H{sub 2}O molecules than in the air. We tried putting silica gel beads into vials to remove H{sub 2}O molecules from PS sheet surface ...
Instruments. The HTS facility houses state-of-the-art liquid handlers and multi-mode plate readers that can be integrated into screening systems for automated HTS applications. The suite of plate readers contains instruments with varying sensitivities for all common modalities including absorbance, fluorescence, time-resolved fluorescence, fluorescence polarization and luminescence. Additionally, we offer label-free, alpha screen, scintillation proximity and high-content screening technologies. Liquid handling capabilities allow for volume transfers ranging from 2.5 nanoliters to liters, in various combinations of fixed and random plate arrays. Readers and liquid handlers are available for walk-up use, as well as automated screening. Furthermore, the facility staffs a full-time engineer to ensure the instrumentation meets or exceeds industry specifications for operation. Data Analysis and Storage. The informatics and statistical capabilities of the HTS facility include data storage, archival and ...
Scintillation fluids based on toluene or xylene will no longer be available except by special order. Principal investigators who are authorized to use radioactive materials or are applying for such use may petition the Executive Committee for a scintillation fluid exception. Petitions must be submitted in writing and clearly state why the use of a scintillation counting fluid with a flash point , 140o F is required for their scintillation counting needs ...
Read user reviews, compare products and contact manufacturers of Scintillation products, including particle counters, scintillation counters and radiometers on SelectScience.
Radioactivity Analysis. Blood and plasma samples (0.1 ml), urine samples (0.2 g), and cage rinses (0.5 g) were added to Ultima Gold XR scintillation cocktail. Feces were homogenized in water, and samples (0.2 g) were combusted using a Packard model 307 Sample Oxidizer (PerkinElmer Life and Analytical Sciences). Cage wipes were extracted in water using gentle shaking, and samples (0.5 g) were added to the scintillation fluid. The pooled mouse carcasses (3/sample) were cut into pieces and digested using 1 N NaOH, and samples (0.5 g) were weighed and decolorized using 30% H2O2. Ultima Gold XR scintillation cocktail was added, and the samples were counted after sitting overnight at room temperature. Each rat brain was homogenized using a probe-type homogenizer at a 1:1 ratio (w/w) with a solution of 36 μM tranylcypromine, an MAO inhibitor, before samples were combusted. All samplers were analyzed by LSC using Packard model 2900TR liquid scintillation counters.. Bioanalytical Analysis for Bicifadine ...
Dimitriadis, Alexis, Silvestre Patallob, I, Billas, I, Duane, S, Nisbet, Andrew and Clark, CH (2017) Characterisation of a plastic scintillation detector to be used in a multicentre stereotactic radiosurgery dosimetry audit ...
International Scholarly Research Notices is a peer-reviewed, Open Access journal covering a wide range of subjects in science, technology, and medicine. The journals Editorial Board as well as its Table of Contents are divided into 108 subject areas that are covered within the journals scope.
Liquid scintillation counting (LS Counting) is a laboratory-based technique that uses a Liquid Scintillation Counter (LSC) to count the radioactive emissions from a liquid sample. It is often used in the biological sciences to measure the uptake of radioactive isotopes into biological materials. The different forms of an element are called isotopes.. For instance, the nucleus of the element phosphorus has 15 protons but it may contain differing numbers of neutrons. If it has 13 neutrons it is called 28P (15 + 13 = 28) and if it has 19 neutrons it is called 34P. In fact phosphorus exists as 7 different isotopes:. 28P, 29P, 30P, 31P,32P, 33P, 34P. 31P is the most abundant form and is stable whereas the other isotopes may be unstable and emit radioactivity. In the case of 32P, a beta particle is emitted.. LSC is a method of counting radioactive emissions from a limited range of radionuclides. The common isotopes used include:. ...
Typically, a PET-scanner consists of a detector ring with 60 cm diameter and 20 cm length inside which the patient is positioned. For brain studies the patient bed is positioned in such a way that the entire brain is within the field of view. To investigate the entire patient the bed is moved step-by-step. The detector consists of scintillation detectors with scintillation crystals coupled to photomultipliers. The radiation, which is emitted from the patient after the injection of a weak radioactively labelled substance (radiotracer), causes light pulses within the scintillation crystals. This light is converted to electrical signals by the photomultiplier. A detector is linked to opposing detectors by a coincidence logic: if the radiation hits two opposing detectors within a time interval of, e.g. 6 ns, it is assumed that the radiation comes from a radiotracer molecule located on the line connecting the two detectors. During the PET study, which can last from a few minutes up to two or three ...
Scintillography is mainly used in scintillation cameras in experimental physics. For example, huge neutrino detection underground tanks filled with tetrachloroethylene are surrounded by arrays of photo detectors in order to capture the extremely rare event of a collision between the fluids atoms and a neutrino. Another extensive use of scintillography is in medical imaging techniques which use gamma ray detectors called gamma cameras. Detectors coated with materials which scintillate when subjected to gamma rays are scanned with optical photon detectors and scintillation counters. The subjects are injected with special radionuclides which irradiate in the gamma range inside the region of interest, such as the heart or the brain. A special type of gamma camera is the SPECT (Single Photon Emission Computed Tomography). Another medical scintillography technique, the Positron-emission tomography (PET), which uses the scintillations provoked by electron-positron annihilation phenomena. ...
BioAssay record AID 629721 submitted by ChEMBL: Displacement of [3H]-8-OH-DPAT from 5-HT1A receptor in rat hippocampus by liquid scintillation counting.
The indoor 222Rn radionuclide was directly absorbed in typical 20 ml glass scintillation vials by passing −3 dm3of ambient air through 16 ml of water-immiscible non-volataile scintillation cocktail...
A method was devised to measure gray and white matter cerebral blood flow simultaneously in multiple regions of the brain using 133Xenon and a multiple-crystal scintillation camera. Following magnification cerebral arteriography, 133Xe was injected into the internal carotid artery and the washout of tracer was monitored with a scintillation camera which consists of 294 individually collimated NaI (TI) crystals. These data, obtained from each crystal overlying the brain, were processed by a weighted least-squares nonlinear regression technique. The blood flow rates of the rapid and slow compartments were calculated by the Kety-Schmidt formula along with 95% confidence limits for each measurement.. In four patients, local increases or decreases in regional cerebral flow were correlated with areas of pathology. In one patient with a cerebral arteriovenous malformation, regions of local shunting of tracer were identified. Application of a three-compartment analysis to these curves permitted ...
Select the radioisotope Calcium Ca-45 Carbon C-14 Chrome Cr-51 Cobalt Co-57 Hydrogen H-3 Iodine I-125 Iodine I-131 Phosphorus P-32 Phosphorus P-33 Sodium Na-22 Sulfur S-35 ALI = Annual Limit of Intake EQ = Exemption Quantity For more information on other radioisotopes go to the Canadian Nuclear Safety Commission (CNSC) website. Ca-45 - Properties and Precautions Radiotoxicity Low to medium Half life 163 days Emission Moderate Energy Beta (0.257 MeV) Range in air 52 cm Critical organs/tissue Bone Precautions Gloves, Lab coat, Aerosol control, Contamination control Shielding 3 mm, plexiglas (lucite shield) Monitor beta-probe, wipes counted by liquid scintillation counter ALI 30 (ingestion) and 9 (inhalation) EQ 1 MBq TOP OF PAGE C-14 - Properties and Precautions Radiotoxicity Low to medium Half life 5730 years Emission Moderate Energy Beta (0.156 MeV) Range in air 24 cm Critical organs/tissue Fatty tissue Precautions Gloves, lab coat, aerosol control, contamination
Receptor Binding Assay. Competitive binding assays were carried out to determine the binding affinities of opioid compounds for μ-, δ-, and κ-opioid receptors. Membrane protein (100 μg/tube) prepared from CHO-μ, -δ, or -κ cells was incubated in 50 mM Tris-HCl buffer (pH 7.4) containing 2 nM [3H]diprenorphine and different concentrations of compounds in a total volume of 0.5 ml for 30 min at 37°C. Nonspecific binding was determined with 50 μM naloxone. The binding was terminated by inserting the assay tubes into ice-cold water, and membrane-bound [3H]diprenorphine was rapidly separated by filtration through GF/C filters. The filters were washed with 5 ml of ice-cold Tris-HCl buffer three times, and filter-bound radioactivity was counted by a liquid scintillation counter.. [35S]GTPγS Binding Assay. [35S]GTPγS binding assay was used as a functional measure of the agonist efficacy and potency of these compounds for the μ-opioid receptor. Membrane protein (100 μg/tube) prepared from ...
BioAssay record AID 646449 submitted by ChEMBL: Displacement of [3H]-LSD from human full length cloned 5HT6 receptor expressed in human HEK293 cells by liquid scintillation counter.
Suitable for liquid scintillation counting, gamma counting and chromatography applications. Choose from a variety of vial, cap and liner materials. Scintillation vial materials include glass, HDPE and PP. Vials are available with caps attached or caps packaged separately.. ...
Beamlines on synchrotrons worldwide need a lot of specific components in order to carry out specialised and state of the art experiments. Scintillators are essential components which make X-rays visible so they can be detected with CCD or CMOS cameras.. The sub-micrometre resolution and high image contrast demanded by todays experiments require scintillator films with thicknesses in the range 1-20 μm as well as providing high optical quality and uniformity. Thin scintillators minimise degradations due to focusing defects, diffraction and spherical aberrations, therefore boosting the image contrast and spatial resolution. But the sophisticated techniques required to grow such crystals and their high specificity means that very thin single crystal film scintillators are not commercially available.. In April 2010, the ESRF established a unique liquid phase epitaxy facility for single crystal film scintillators. Liquid phase epitaxy is a technique whereby scintillating crystal layers are grown on ...
Marketech offers custom fabricated components and semi-finished stock from tungsten, refractory metals, ceramics, sapphire, heat sinks, crystals
Cardiac output was measured by the injection method, using I131-labeled human serum albumin as indicator, and measuring concentration-time curves through the intact skin with a collimated scintillation counter. Although, in principle, any number of blood vessels could be used as the measuring site, it was found that because of recirculation, ... read more suitable curves were obtained only if the counter was directed toward the head or the heart. Cardiac output values calculated from these curves were compared with values found with the classical sampling method. Head, heart, and arterial sampling curves were measured simultaneously with one injection of radioactive indicator. The measurements show that a head curve could be used in measuring cardiac output by the injection method, but it is not very successful because of the rather high standard deviation of the result (25 per cent). A heart curve, however, can successfully replace an arterial sampling curve. The accuracy of heart and arterial ...
UCLA-1. Early Experimental Imaging of the Thyroid Gland Using Iodine 131. IN 1951, the University of California, Los Angeles conducted a series of tests on humans to study the uptake of radioiodine into the thyroid gland. Additional tests were made on patients at the Sawtelle Veterans Hospital. The main purpose of this study was to test a new automatic scanner and recorder.. Initial scans were made using a collimated gamma scintillation counter. This equipment enabled a record to be obtained on which an image of the gland was visible and which the researchers concluded was better than a total activity count for clinical studies of thyroid disease.. The second set of scans was made on a frozen tissue preparation obtained from a terminal patient who had been given 3 millicuries of iodine-131, 14 hours before his death. The measured total activity of the thyroid gland at the time it was scanned was about 50 microcuries.. The results of these tests led to increased use of this equipment for ...
A general method has been developed for measuring the stabilization of class I MHC molecules in extracts of the mutant cell lines .174/T2 and RMA-S. 35S-Met-labeled class I molecules which have been stabilized by peptides in vitro are immunoprecipitated with conformation dependent monoclonal antibodies and electrophoresed on polyacrylamide gels. The heavy and light chains are excised from the dried gel and quantified on a flat bed scintillation counter. The stabilizing effect of peptides on class I molecules in vitro correlates well with peptide binding measured by direct methods and can be therefore used to assess peptide binding affinity. We show that a peptide from HIV-1 gag (which has a high affinity for Db) is a CTL epitope restricted through Db, and also use the assay to analyse the effects of amino acid substitution on peptide affinity. In addition, the effect of a given peptide on a class I molecule within a mixture of human class I molecules can be distinguished by immunoprecipitation with the
A scintillation counter permits the use of very low doses of I131-albumin in the recording of radiocardiograms. In the presence of mild heart failure there is a distinct widening of the interval between the humps derived from the right and left heart. Application of the principle of three-compartment serial dilution suggests that this prolongation may be due in large part to reduced cardiac output; however, cardiac dilatation may contribute significantly. Although radiocardiographic tracings represent time concentration curves, wide angle counting over the heart does not permit a reliable direct estimate of cardiac output. The chief source of error lies in the variable contribution of surrounding extracardiac tissue to the total activity which is recorded.. ...
Advertisement No. 16/2016. Last Date of Receipt of Applications : 05.06.2017. The CSIR-lnstitute of Himalayan Bioresource Technology, Palampur (CSIR-IHBT) is one of the National Institute under the Council of Scientific & Industrial Research which is an Autonomous Body. It is located on a 250 acres of land with the backdrop of snow-covered peaks of Dhauladhar Range in salubrious climate. The Institute is engaged in research and technology development programmes for sustainable management of bioresources of the Himalayas. The Institute has successfully carried out mission-oriented projects on tea, temperate floriculture and aromatic plants and is well equipped for Tissue culture and Biotechnology. Facilities include Tea Processing Unit, FRP greenhouses and equipments like GC-MS, FT-IR, Ultrascan, Automated DNA sequencers, Phosphoimager, Q-TOF, XL Laser densitometer, HPLCs, MALDI-TOF.CONFOCAL MICROSCOPY, C02 Extractor, FPLC, HP-TLC, IRGA, NMR, Scintillation counter, computer networking ...
FT-IR, JASCO Circular Dichroism J-815, UV-Vis spectrophotometer, Fluorescence spectrophotometer, Micro-isothermal titration calorimeter, Differential scanning calorimeter, Fluorescent/ luminescent/ UV/ Vis plate reader (Biotek, Synergy 2), High speed and ultra-speed centrifuges Scintillation Counters, FPLC, Thermocyclers, Computer Cluster, PCR, real time, single color PCR, real time, multicolor, DNA sequencers, Electrospray Mass Spectrometry, CHI Scanning Potentiostat, HPLC, Confocal Imagining Microscope, GUAVA Cell Cytometer, Fluorescence microscope, Multimode plate reader, Atomic force microscope, Tissue culture facilities, Phoshorimager, Nanodrop and others. ...
In article ,CntqCs.FtB at umdnj.edu, bawagan at umdnj.edu (Hinayana Bawagan) writes: , , I have ordered the rabbit reticulocyte system from Promega which ,provides luciferase as the positive control. I am wondering which of the ,assays - standard one using luminometer or scintillation counter; or the ,photographic assay - is more convenient. I have not done any in vitro ,translation before so I will appreciate any comments and suggestions. Thank ,you very much. Depends on what youre doing with it. If you have cell lysates which you just want to assay, the LSC is very sensitive, and I find it more useful. If you want to know where abouts its expressed (i.e. in which cells), or run it on a gel youll need the photographic assay, unless you have a really fancy luminometer which reads gels (?!?). I dont use that rabbit reticulocyte system, but I do find that the LCS is quick, easy and very sensitive for detecting expression of luc in cell culture in general. ...
On May 21, 1946,[11] physicist Louis Slotin and seven other Los Alamos personnel were in a Los Alamos laboratory conducting another experiment to verify the closeness of the core to criticality by the positioning of neutron reflectors. Slotin, who was leaving Los Alamos, was showing the technique to Alvin C. Graves, who would use it in a final test before the Operation Crossroads nuclear tests scheduled a month later at Bikini Atoll. It required the operator to place two half-spheres of beryllium (a neutron reflector) around the core to be tested and manually lower the top reflector over the core using a thumb hole on the top. As the reflectors were manually moved closer and farther away from each other, scintillation counters measured the relative activity from the core. The experimenter needed to maintain a slight separation between the reflector halves in order to stay below criticality. The standard protocol was to use shims between the halves, as allowing them to close completely could ...
... Abstract ...The TopCount Microplate Scintillation and Luminescence Counter has bee... Introduction ...Cerenkov radiation occurs when charged particles traveling at or great...,Cerenkov,Counting,Performance,on,the,TopCountTM,Microplate,Scintillation,and,Luminescence,Counter,biological,advanced biology technology,biology laboratory technology,biology device technology,latest biology technology
Measurement of Radioactivity. Total radioactivity in liquid samples [plasma, urine and bile (BDC rats only)] from all species was determined by liquid scintillation counting using a Tri-Carb 2500A liquid scintillation spectrometer (Canberra Packard, Groningen, The Netherlands). Samples were made up to 1 ml with distilled water, if necessary, and prepared for radioanalysis by the addition of Ultima Gold scintillation cocktail. Solid samples (feces) were homogenized, lyophilized, homogenized again, and combusted using the Canberra Packard System 387 (Oxidizer Tri-Carb 307 and Robot System 80). The formed 14CO2 was trapped in Carbo-Sorb and topped up with scintillation cocktail (Permafluor E+) before radioanalysis.. Metabolite Profiling. Metabolite patterns in plasma, urine, and feces from all species and in bile from BDC rats were determined using high-performance liquid chromatography (HPLC) with on-line radioactivity detection (Ramona 5; Raytest GmbH, Straubenhardt, Germany) or off-line ...
We have been studying scintillation properties of He/Xe, such as luminescence spectra, time profile and scintillation yield. Furthermore we have been measu
This work describes a new pile-up consideration for the very high count rate spectra which are possible to acquire with silicon drift detector (SDD) technology. Pile-up effects are the major and still remaining challenge with the use of SDD for EDS in scanning electron microscopes (SEM) with ultra thin windows for soft X-ray detection. The ability to increase the count rates up to a factor of 100 compared with conventional Si(Li) detectors, comes with the problem that the pile-up recognition (pile-up rejection) in pulse processors is not able to improve by the same order of magnitude, just only with a factor of about 3. Therefore, it is common that spectra will show significant pile-up effects if count rates of more than 10000 counts per second (10 kcps) are used. These false counts affect both automatic qualitative analysis and quantitative evaluation of the spectra. The new idea is to use additional inputs for pile-up calculation to shift the applicability towards very high count rates of up ...
The present invention provides a detector for a CT system. The detector includes a scintillator with built-in gain for receiving and converting high frequency electromagnetic energy to light. Each scintillator is formed of a scintillating material and an optically stimulated material. The components may be intermixed with one another to form a single composite structure or formed into layers to form a single layered structure. The scintillator may be incorporated into the detector array of any CT system including medical diagnostic systems and package/baggage inspection systems.
This report examines the Glass Scintillator market standing and opportunity of global plus major regions, from plans of manufacturers, regions, product types and end industries; this report investigates the best manufacturers in global and major regions and splits the Glass Scintillator market by product type and applications/end industries. The Global Glass Scintillator market is considered…