Transport and noise properties of Si nanowire channels with different lengths before and after gamma radiation treatment

2013 ◽  
Author(s):  
Jing Li ◽  
Svetlana Vitusevich ◽  
Mykhailo Petrychuk ◽  
Sergii Pud ◽  
Viktor Sydoruk ◽  
...  
Keyword(s):  
Gamma Radiation ◽  
Radiation Treatment ◽  
Si Nanowire ◽  
Before And After

Single-trap kinetic in Si nanowire FETs: effect of gamma radiation treatment

MRS Advances ◽  
2016 ◽  
Vol 1 (56) ◽  
pp. 3755-3760 ◽  
Author(s):  
I. Zadorozhnyi ◽  
J. Li ◽  
S. Pud ◽  
M. Petrychuk ◽  
S. Vitusevich
Keyword(s):  
Gamma Radiation ◽  
Transport Properties ◽  
Radiation Treatment ◽  
Coupling Effect ◽  
Si Nanowire ◽  
Noise Spectroscopy ◽  
Device Structures ◽  
Small Doses ◽  
Effect Transistor

ABSTRACTHere we report on the effect of gamma radiation treatment on transport properties and single-trap kinetics in Si nanowire (NW) field effect transistor (FET) structures. We used noise spectroscopy as a powerful method for advanced physical characterization of nanoscale devices. Our results demonstrate that transport properties of NW FETs can be changed using small doses of gamma radiation treatment. We reveal an enhancement of the gate coupling effect, which is explained as a result of the reorganization of the native defect structure after treatment. The radiation treatment approach allows the single-trap dynamic to be changed, which opens up prospects for a number of fundamental studies and applications of Si NW FET device structures, including biosensors.

Evaluation of Fungal Burden and Aflatoxin Presence in Packed Medicinal Plants Treated by Gamma Radiation

2010 ◽  
Vol 73 (5) ◽  
pp. 932-937 ◽  
Author(s):  
SIMONE AQUINO ◽  
EDLAYNE GONÇALEZ ◽  
MARIA HELENA ROSSI ◽  
JULIANA HELLMEISTER de CAMPOS NOGUEIRA ◽  
TATIANA ALVES dos REIS ◽  
...  
Keyword(s):  
Medicinal Plants ◽  
Gamma Radiation ◽  
Gamma Ray ◽  
Radiation Treatment ◽  
Fungal Burden ◽  
Toxigenic Fungi ◽  
Cassia Angustifolia ◽  
Long Term Storage ◽  
Before And After ◽  
Open Air Markets

This study was developed to evaluate the fungal burden, toxigenic molds, and mycotoxin contamination and to verify the effects of gamma radiation in four kinds of medicinal plants stored before and after 30 days of irradiation treatment. Eighty samples of medicinal plants (Peumus boldus, Camellia sinensis, Maytenus ilicifolia, and Cassia angustifolia) purchased from drugstores, wholesale, and open-air markets in São Paulo city, Brazil, were analyzed. The samples were treated using a 60Co gamma ray source (Gammacell) with doses of 5 and 10 kGy. Nonirradiated samples were used as controls of fungal isolates. For enumeration of fungi on medicinal plants, serial dilutions of the samples were plated in duplicate onto dichloran 18% glycerol agar. The control samples revealed a high burden of molds, including toxigenic fungi. The process of gamma radiation was effective in reducing the number of CFU per gram in all irradiated samples of medicinal plants after 30 days of storage, using a dose of 10 kGy and maintaining samples in a protective package. No aflatoxins were detected. Gamma radiation treatment can be used as an effective method for preventing fungal deterioration of medicinal plants subject to long-term storage.

scholarly journals EFFECT OF MINDFULNESS INTERVENTION ON THE INTENSITY OF PAIN IN NASOPHARINGEAL CANCER PATIENTS UNDERGOING RADIATION TREATMENT

2018 ◽  
Vol 4 (2) ◽  
pp. 195-201
Author(s):  
Anna Jumatul Laely ◽  
Awal Prasetyo ◽  
Chandra Bagus Ropyanto
Keyword(s):  
Cancer Patients ◽  
Radiation Treatment ◽  
Nasopharyngeal Cancer ◽  
Psychological Trauma ◽  
Control Group ◽  
Intensity Level ◽  
Control Group Design ◽  
Mindfulness Intervention ◽  
Significant Difference ◽  
Before And After

Background: Physical responses that occur in patients with nasopharyngeal cancer are the emergence of pain due to the effects of treatment. The problem of pain in these patients at the stage of treatment remains critical to solve because it can cause comorbidity, psychological trauma and mortality. Mindfulness intervention is considered useful in transforming consciousness into the stage of acceptance.Objective: This study aims to determine the effect of mindfulness intervention on the intensity of pain in nasopharyngeal cancer patients undergoing radiation treatment.Methods: This was a quasy-experimental study with pretest posttest control group design. Thirty patients were selected using consecutive sampling, which divided into experiment and control group. Visual Analogue Scale (VAS) was used to measure pain. Each respondent received mindfulness intervention for 6 sessions, divided into 3 meetings. Paired t-test was used for data analysis.Results: The results showed a significant reduction of pain from 4.12 (moderate pain) to 3.06 (mild pain) in the experiment group. There was a significant difference in pain level before and after mindfulness intervention (p= 0.001).Conclusion: Mindfulness is effective in reducing pain intensity level in nasopharyngeal cancer patients undergoing radiation therapy.

scholarly journals Gamma radiation treatment activates glucomoringin synthesis in Moringa oleifera

2017 ◽  
Vol 27 (5) ◽  
pp. 569-575 ◽  
Author(s):  
Tsifhiwa Ramabulana ◽  
Risimati D. Mavunda ◽  
Paul A. Steenkamp ◽  
Lizelle A. Piater ◽  
Ian A. Dubery ◽  
...  
Keyword(s):  
Gamma Radiation ◽  
Moringa Oleifera ◽  
Radiation Treatment

scholarly journals Effect of Gamma Radiation on Characteristic of bipolar junction Transistors (BJTs )

2021 ◽  
pp. 1-9
Author(s):  
Abdenabi Ali Elamin ◽  
Waell H Alawad
Keyword(s):  
Gamma Radiation ◽  
Power Supplies ◽  
Strong Increase ◽  
Bipolar Junction Transistors ◽  
Bipolar Junction Transistor ◽  
Before And After ◽  
Junction Transistor ◽  
The Individual ◽  
Silicon Transistor ◽  
Different Doses

This paper describes the effects of 60Cogamma radiation hardness of characteristic and parameters of Bipolar Junction Transistors in order to analyze the performance changes of the individual devices used in nuclear field. Bipolar Junction Transistor (BJT) of the type (BC-301) (npn) silicon, Transistor was irradiated by gamma radiation using 60Cosource at different doses (1, 2, 3, 4, and 5) KGy. The characteristics and parameter of Bipolar Junction Transistor was studied before and after irradiated by using Transistor Characteristics Apparatus with regulated power supplies. Obtained result showed that, the saturation voltage VCE(sat) of Bipolar Junction Transistor decreased because of the gain degradation of the transistor and increased silicon resistivity, Another parameter of a bipolar junction transistor affected by ionizing radiation is a collector-base leakage current, a strong increase of the current is caused by the build-up charge near the junction.

RADT-23. RECURRENT OLIGODENDROGLIOMAS AFTER FIRST CHEMO-RADIATION THERAPY RESPONDED REMARKABLY TO RE-RADIATION

2021 ◽  
Vol 23 (Supplement_6) ◽  
pp. vi46-vi46
Author(s):  
Fumi Higuchi ◽  
Takeo Uzuka ◽  
Keisuke Ueki
Keyword(s):  
Radiation Therapy ◽  
Primary Tumor ◽  
Radiation Treatment ◽  
Karnofsky Performance Status ◽  
Performance Status ◽  
Lateral Side ◽  
Who Grade ◽  
Recurrent Tumors ◽  
Conventional Radiation ◽  
Before And After

Abstract Oligodendrogliomas with 1p/19q-codeletion are relatively slow progressive tumors that show good response to chemo-radiation therapy after resection. The median survival is about 15 years regardless of WHO grade, although recurrences are mostly inevitable and there is no standard treatment for recurrence. We experienced 5 oligodendroglioma cases who underwent re-radiation for recurrent tumors after chemo-radiation treatment. We retrospectively investigated those for response to re-radiation, the duration from first radiation to second radiation, and Karnofsky Performance Status (KPS) before and after the re-radiation. Patients were all male; the median radiation dose for primary tumor was 60Gy (54-60Gy), the median age at first radiation was 46 years (35-59), the median duration from the first radiation to re-radiation was 65 months (range 18-116 months), and the median follow-up period after re-radiation was 15 months (1-39 months). In all 5 cases, tumors showed good response to re-radiation. In 3 of the 5 cases, tumor recurred in corpus callosum and/or lateral side of cerebral hemisphere or basal ganglia contiguous with primary tumor sites and were radiated by IMRT (50Gy/25fr) . In 2 cases, tumors recurred around the fourth ventricle and posterior fossa and underwent conventional radiation (54Gy/30fr and 30Gy/10fr). In 2 of the 5 cases, the tumors re-recurred 24 months later after re-radiation, but the KPS were maintained until re-recurrence. For oligodendrogliomas, re-radiation therapy appears to be very effective to recurrent tumors after first chemo-radiation. Although evaluation for longer-term side effects is to be examined, re-radiation appears to be a good option for recurrent oligodendrogliomas after first chemo-radiation therapy.

scholarly journals RESÍDUOS DE 14C-PROCHLORAZ EM MANGAS IRRADIADAS

2001 ◽  
Vol 11 ◽  
Author(s):  
MARIA APARECIDA COSTA ◽  
VALDEMAR LUIZ TORNISIELO ◽  
JULIO MARCOS MELGES WALDER
Keyword(s):  
Gamma Radiation ◽  
Degradation Product ◽  
Radiation Treatment ◽  
Refrigerated Storage ◽  
Post Harvest ◽  
Brazilian Legislation ◽  
Low Levels

O objetivo deste trabalho foi avaliar os níveis residuais de Prochloraz aplicado em mangas, na pré e pós-colheita após o tratamento com radiação. Os frutos foram submetidos à radiação gama na dose de 1,0 kGy visando verificar se a mesma induziu a degradação do fungicida. As mangas tratadas na pós-colheita foram armazenadas por 21 dias a 12 °C. Os resíduos de Prochloraz não apresentaram decréscimo durante o período de carência (21 dias) estabelecido pela Legislação Brasileira de Agrotóxicos. O armazenamento refrigerado (12 °C) e a irradiação gama também não contribuíram para a degradação do fungicida. O Prochloraz ficou retido principalmente na casca (média = 1,64 µg/g), que funcionou como barreira à contaminação da polpa (média = 0,06 µg/g). O produto de degradação, formado nas cascas das mangas tratadas na pós-colheita, foi identificado como sendo o BTS 44596. Os metabólitos, encontrados em níveis baixos, confirmaram a ocorrência de baixa degradação do fungicida em mangas. 14C-PROCHLORAZ RESIDUES IN IRRADIATED MANGOES Abstract The aim of this work was to evaluate the Prochloraz residual levels applied in mangoes, in pre and post-harvest after radiation treatment. The fruits were submitted to gamma radiation with of 1,0 kGy dose, aiming to verify if it induces the fungicide degradation. Treated post-harvest mangoes were stored, at 12 0C during 21 days. Prochloraz residues did not present reduction after safe period (21 days), established by the Brazilian legislation on agrochemicals. The refrigerated storage (12 0C) and the gamma radiation also did not contribute to the degradation of the fungicide. Prochloraz was mainly retained in the peels (mean = 1,64 µg/g) which served as barrier to the pulp (mean = 0,06 µg/g) contamination. The degradation product, formed in peels of post-harvest treated mangoes was the metabolite BTS 44596. The metabolites found in very low levels, confirm that low fungicide degradation occurs in mangoes.

Effect of Gamma Radiation on Dyeing of Cotton Fabric with Reactive Blue 13

2011 ◽  
Vol 15 (3) ◽  
pp. 107-114 ◽  
Author(s):  
Iram Batool ◽  
Ijaz Ahmad Bhatti ◽  
Shahid Adeel ◽  
Muhammad Abbas
Keyword(s):  
Gamma Radiation ◽  
Gamma Irradiation ◽  
Radiation Treatment ◽  
Reactive Dye ◽  
Iso Standard ◽  
Standard Methods ◽  
Colour Strength ◽  
Dyeing Parameters ◽  
Optimized Conditions ◽  
Temperature Time

The effect of gamma radiation on the dyeing of cotton with Reactive Blue 13 dye powder has been investigated. The cotton and dye powder are irradiated to absorb doses of 100, 200, 300, 400 and 500 Gy by using a Co-60 gamma irradiator. Dyeing is performed by using irradiated and un-irradiated cotton with irradiated and un-irradiated dye powder, in order to observe the effect of radiation treatment on the colour strength of the reactive dye on cotton. Different dyeing parameters such as temperature, time and p H are optimized using irradiated cotton and dye powder. The effect of gamma irradiation on the colour strength and Lab values has been observed through optimized conditions of dyeing. The colour strength and Lab values are obtained by spectra flash spectrophotometer (SF650). ISO standard methods are employed to study the effect of gamma radiation on the Colourfastness properties of fabric. It can be demonstrated that gamma irradiation not only improves the colour strength of the dye in irradiated cotton, but also enhances the Colourfastness properties.

Magnetic resonance imaging of spinal cord compression in thalassaemia before and after radiation treatment

1995 ◽  
Vol 50 (7) ◽  
pp. 504-505 ◽  
Author(s):  
A.D. Gouliamos ◽  
G.A. Plataniotis ◽  
E.S. Michalopoulos ◽  
L.J. Vlahos ◽  
C.G. Papavasiliou
Keyword(s):  
Magnetic Resonance Imaging ◽  
Spinal Cord ◽  
Magnetic Resonance ◽  
Spinal Cord Compression ◽  
Radiation Treatment ◽  
Cord Compression ◽  
Resonance Imaging ◽  
Before And After
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