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Gamma Ray - Europe PMC

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Last Updated: 03 September 2022

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Enhancing the electrical properties of graphite nanoflake through gamma-ray irradiation.

To validate the predicted results of materials as well as engineering material properties in a controlled manner, understanding changes in material properties as a result of external stimulus is vital. We investigate a change in the c-axis electrical characteristics of graphite nanoflakes induced by gamma-ray irradiation's conductive probe microscopy here. The c-axis electrical conductance increase in GnFs with gamma-ray irradiation may be attributed to a decrease in interlayer spacing, but the reason may also play a role.

Source link: https://europepmc.org/article/MED/36050363


Hadronic Interaction Model Dependence in Cosmic Gamma-ray Flux Estimation Using an Extensive Air Shower Array with a Muon Detector

Tests using high-energy gamma rays using air showers have notably progressed by the Tibet AS HAWC, and LHAASO experiments. This experiment calculates the gamma-ray flux from real data's difference between the number of on-source and off-source events by real numbers, using Monte Carlo simulations, which in turn depends on the hadronic interaction schemes. For the first time, we quantitatively assessed model dependence on hadronic interaction models using ALPAQUITA, ALPACA's prototype project. In the typical gamma-ray flux estimation by ALPAQUITA, we estimate the model dependence on hadronic interactions as less than 3. 6 percent; this is negligible compared to other uncertainties such as energy scale uncertainty in the energy range from 6 to 300 TeV, which is dominated by Monte Carlo estimates.

Source link: https://europepmc.org/article/PPR/PPR537339


Gamma ray-induced tissue responses and improved secondary metabolites accumulation in Catharanthus roseus.

The present study examined the effect of gamma ray irradiation on callus biomass production and the yield of vincristine and vinblastine of in vitro grown tissue of Catharanthus roseus. Callus biomass growth was the highest in 20 Gy exposed tissues in 20 Gy exposed tissues, but it was less in 100 Gy treatments. The gamma-irradiated embryogenic tissue differentiated into embryos, but embryogenesis % and somatic embryo number per culture decreased with increasing doses. Protein deposition in embryonic tissue at the beginning stages of embryogenesis was reduced by 80% by increased 80 Gy gamma dose, which resulted in a 43 percent decrease in protein accumulation at the start stages of embryogenesis. Soluble sugar level also decreased gradually in 80 Gy treated tissues, relative to control, as the amount was less than in control. Using high-pressure thin layer chromatography, the quantification of vinblastine and vincristine in gamma ray elicitated tissues was achieved. Compared to control, the maximum yield of vinblastine at 40 Gy irradiation dose was 13. 75 percent, with a 12% increase in yield. Similarly, the most abundant vincristine was observed at a low gamma irradiation dose in leaf tissues. According to the present research, the synthesis of vinblastine and vincristine was growth- and development-specific, with the lower 20-40 Gy gamma levels being more effective in enriching alkaloids, although higher doses decreased yield. After gamma ray therapy, vinegar, vincristine yield was estimated in vitro grown tissues and leaves of embryo regenerated Catharanthus roseus in infant tissues and leaves.

Source link: https://europepmc.org/article/MED/35962802


Comparative analysis of gamma ray spectrometers applied to Irati Formation, Paraná basin, São Paulo State, Brazil.

S00e3o Paulo, Brazil, This paper discusses the use of gamma ray spectrometry in the analysis of rock samples from the Irati Formation, Paranu00e1 sedimentary basin. These rock samples were colleted at Partecal Quarry, which is located in Rio Claro, which have been of concern for the oil and gas industry, and have been analyzed by gamma ray analysis. The results revealed several factors that influence the gamma ray analysis of uranium, thorium, and potassium, including the testing of variance, which turned out to be of great importance for determining the mean concentration values of eU, eTh, and potassium, including the determination of variance, which was found to be of great importance for determining the differences in the mean concentration values of eU, ethorium, and potassium, including the determination of variance, shape and geometry, t ray nium, based on the gamma ray analysis of gamma ray measurements t, gamma tho ma thorium, e determining the variation of the gamma thorium, torium, a thorium, a tho t calculating the difference in the tho thorium, tho hema thorium, eto te to,.

Source link: https://europepmc.org/article/MED/35970115


Safety of terminally gamma-ray-sterilized screws coated with fibroblast growth factor 2-calcium phosphate composite layers in non-human primates.

Because of the biological activity of FGF-2, screws coated with fibroblast growth factor 2 -calcium phosphate composite layers exhibit enhanced soft tissue and bone growth and angiogenesis. In addition, the mitogenic activity of the FGF-2 within the composite layers remains unchanged after gamma-ray sterilization, which may increase the storage stability prior to clinical use. However, these screws' in vivo safety as spinal implants remain uncertain. Two cynomolgus monkeys exceeding 12 weeks were implanted into the vertebral bodies of two cynomolgus monkeys exceeding 12 weeks, coated with FGF-2-CP composite layers and exposed to either gamma-ray sterilization at 25 kGy or aseptic storage. No significant differences were observed between the two groups in bone and fibrous tissue apposition rates and rate of bone formation in the intraosseous zone. According to our results, FGF-2-CP composite layer-coated screws subjected to terminal gamma-ray sterilization are as safe as those made in aseptic processing.

Source link: https://europepmc.org/article/MED/35941264


Sterility of Cydia pomonella by X ray irradiation as an alternative to gamma radiation for the sterile insect technique.

Achieving the limitations set by environmentally friendly area-wide integrated pest management strategies, such as mating disruption and attract-kill, which are impossible to eradicate in a high-density pest population, as well as insecticide resistance, could be able to overcome the challenges faced by environmentally friendly area-wide integrated pest control strategies such as mating disruption and attract-kill, which are impossible to eliminate in a high-density pest population, as well as the establishment of insecticide resistance, could be We investigated the possibility of X-ray irradiation on a laboratory strain of C. pomonella fecundity and fertility, using a recently established irradiator, to determine the possibility of X-rays as a replacement for Cobalt 60 and the increased role of this strategy in codling moth control. Although exposure to a radiation dose of 366 Gy resulted in a dramatic decrease in male moth mating competitiveness, our radiation biology findings indicate that this latest generation of X-ray irradiator has potential uses in SIT programs for future codling moth control.

Source link: https://europepmc.org/article/MED/35938224


Gamma-Ray-Induced Structural Transformation of GQDs towards the Improvement of Their Optical Properties, Monitoring of Selected Toxic Compounds, and Photo-Induced Effects on Bacterial Strains.

In the presence of the different ethylenediamine amounts, the different ethylenediamine levels were irradiated, and the highest percentage of N was detected in the presence of 10 g. N-doped GQDs exhibited a lot of blue photoluminescence. As a PL investigation for the detection of insecticide Carbofuran and herbicide Amitrole, Modified GQDs were investigated. Amitrole was first detected by GQDs in a turn-off/turn-on technique using Pd ions as a quenching agent for the first time. Pd ions were quenched in PL of GQDs, as a result of Amitrole's removal, PL was recovered linearly with Amitrole concentrations, with Amitrole concentrations. Modified GQDs can be used as a cost-effective new material for Carbofuran and Amitrole detection, according to these results. When bacterial cells were exposed to different GQD concentrations and light of 470 nm wavelengths, the harmful effects were not observed.

Source link: https://europepmc.org/article/MED/35957147

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions