scholarly journals Evaluation of radioprotective effect of chickpea (Cicer arietinum) in the survival of Lasioderma serricorne (Fabricius, 1792) (Coleoptera, Anobìidae) irradiated with 60Co

2019 ◽  
Author(s):  
Adilson C. Barros ◽  
Kayo Okazaki ◽  
Valter Arthur
Keyword(s):  
Gamma Rays ◽  
First Generation ◽  
Biological Effects ◽  
Control Diet ◽  
Whole Grains ◽  
Lasioderma Serricorne ◽  
Protective Properties ◽  
Summary Statement ◽  
Set Up ◽  
Radioprotective Properties

ABSTRACTWe investigated the presence of natural radioprotectors in food using a new technical modality that utilizes the insect Lasioderma serricorne as a radiosensitivity bioindicator to check radioprotection properties in minimally processed chickpeas. The insects were obtained from the entomological biotherium of the Laboratory of Radiobiology and Environment of CENA-USP. They were fed with an experimental diet and just when the first generation hatched completely, the experiments were conducted. The randomly chosen control diet, consisted of three parts of wheat germ, one part of brewer’s yeast, and a slice of French bread toasted in an oven previously set up for humidity control. The diet of chickpeas consists only of whole grains crushed in a mechanical grinder to obtain flour. The result was significant for the survival of insects (p<0.0001) reared on a diet of chickpeas compared to those reared on control diet irradiated with gamma rays from 60Co in the range of 5.0 to 1500 Gy. We presented statistical evidence that the chickpea diet has radioprotective properties in the insect for gamma rays.SUMMARY STATEMENTThe study is important because it shows that chickpea has protective properties against ionizing radiation, how to act against its biological effects and minimize them.

scholarly journals Detection capability of Migdal effect for argon and xenon nuclei with position sensitive gaseous detectors

2020 ◽  
Author(s):  
Kiseki D Nakamura ◽  
Kentaro Miuchi ◽  
Shingo Kazama ◽  
Yutaro Shoji ◽  
Masahiro Ibe ◽  
...  
Keyword(s):  
Gamma Rays ◽  
Experimental Approach ◽  
Isotope Separation ◽  
Mass Region ◽  
Background Rate ◽  
Argon Gas ◽  
Low Mass ◽  
Position Sensitive ◽  
Set Up ◽  
Direct Dark Matter

Abstract Migdal effect is attracting interests because of the potential to enhance the sensitivities of direct dark matter searches to the low mass region. In spite of its great importance, the Migdal effect has not been experimentally observed yet. A realistic experimental approach towards the first observation of the Migdal effect in the neutron scattering was studied with Monte Carlo simulations. In this study, potential background rate was studied together with the event rate of the Migdal effect by a neutron source. It was found that a table-top sized ~ (30cm)3 position-sensitive gaseous detector filled with argon or xenon target gas can detect characteristic signatures of the Migdal effect with sufficient rates (O(102 ~ 103) events/day). A simulation result of a simple experimental set-up showed two significant background sources, namely the intrinsic neutrons and the neutron induced gamma-rays. It is found that the intrinsic neutron background rate for the argon gas is acceptable level and some future study for the reduction of the gamma-rays from the laboratory would make the observation of the Migdal effect possible. The background for the xenon gas, on the other hand, is found to be much more serious than for the argon gas. Future works on the isotope separation as well as the reduction of the gamma-rays from the detector and laboratory will be needed before the Migdal effect observation for xenon gas case.

scholarly journals The Anime Connection. Early Euro-Japanese Co-Productions and the Animesque: Form, Rhythm, Design

Arts ◽  
2018 ◽  
Vol 7 (4) ◽  
pp. 59
Author(s):  
José Iglesias
Keyword(s):  
Facial Expressions ◽  
First Generation ◽  
Visual Language ◽  
Character Design ◽  
Set Up ◽  
First Contact ◽  
European Markets

After European audiences had first contact with anime in the late 1970s, animated co-productions between domestic producers and Japanese studios emerged in the early 1980s, playing a lead role in standardizing anime aesthetics and hence contributing to the broader development of anime in Spain and other major European markets. These pioneering co-productions fostered the arrival of Japanese studios to the European broadcasting scene. However, its real impact on the popularization of anime is subject to debate. Appealing to a European audience, these series lacked some of the most recognizable features associated with anime as a larger medium. Nonetheless, in some of these animated productions there was an underlying animesque flair in the shape of conventionalized elements, character design, facial expressions, rhythm, camera action and tropes. Neither entirely domestic nor fully Japanese, these hybrid productions set up a ‘bridge’ between European and American animated visual language and anime mainstream features, thereby shaping the collective idea of what anime is for the first generation of viewers in Spain and Europe.

scholarly journals Improving the performance of 241Am-Be for PGNAA applications using a proper shielding for neutron source and the NaI detector

2010 ◽  
Vol 25 (3) ◽  
pp. 205-211 ◽  
Author(s):  
Hamed Panjeh ◽  
Hashem Hakimabad ◽  
Lalle Motavalli
Keyword(s):  
Gamma Rays ◽  
Energy Region ◽  
Gamma Ray ◽  
Region Of Interest ◽  
High Rate ◽  
Prompt Gamma ◽  
Peak Resolution ◽  
Set Up ◽  
Gamma Ray Detector

The gamma ray spectrum resolution from a 241Am-Be source-based prompt gamma ray activation analysis set-up has been observed to increase in the energy region of interest with enclosing the NaI detector in a proper neutron and gamma ray shield. We have investigated the tact that the peak resolution of prompt gamma rays in the region of interest from the set-up depends on the source activity to the great extent, size and kind of the detector and the geometry of the detector shield. In order to see the role of a detector shield, five kinds of the detector shield were used and finally the proper kind was introduced. Since the detector shield has an important contribution in the reduction of the undesirable and high rate gamma rays coming to the gamma ray detector, a good design of a proper shield enables the elimination of the unwanted events, such as a pulse pile-up. By improving the shielding design, discrete and distinguishable photoelectric peaks in the energy region of interest have been observed in the spectrum of prompt gamma rays.

scholarly journals GTEM Cell Experimental Set up for In Vitro Dosimetry

2007 ◽  
Vol 3 (1) ◽  
pp. 34
Author(s):  
Giovanna Calò ◽  
Francesco Lattarulo ◽  
Vincenzo Petruzzelli
Keyword(s):  
Mobile Phones ◽  
Specific Absorption Rate ◽  
Biological Effects ◽  
Impedance Matching ◽  
Time Domain Reflectometry ◽  
Environmental Requirements ◽  
Set Up ◽  
Gtem Cell ◽  
In Vitro Dosimetry

A GTEM cell, suitable for assessing possible biological effects induced on cell samples by electromagnetic fields at the typical frequencies of GSM mobile phones, has been designed and set up. Basic environmental requirements for in-vitro biological experiments, involving a GTEM cell, have been assessed by controlling the electromagnetic field distribution and survival conditions. The GTEM cell has been characterized by Standing Wave Ratio (SWR) and Time Domain Reflectometry (TDR) measurements. The impedance matching at the terminal load section has been optimized by considering different hybridload configurations. Moreover, optimal exposure conditions forthe biological sample have been experimentally evaluated by paying special attention to the E-field scenario inside the GTEM cell at 900 MHz and 1800 MHz frequencies. At last, an experimental evaluation of the Specific Absorption Rate (SAR) is reported.

The Burke Synthesis of ( + )-Didemniserinolipid B

2011 ◽  
Author(s):  
Douglass Taber
Keyword(s):  
First Generation ◽  
Secondary Alcohol ◽  
Unsaturated Ester ◽  
Unsaturated Ketone ◽  
Grubbs Catalyst ◽  
University Of Wisconsin ◽  
Set Up ◽  
Open Face ◽  
Vinyl Group ◽  
The University

The sulfate ( + )-didemniserinolipid B 3, isolated from the tunicate Didemnum sp, has an intriguing spiroether core. A key step in the synthesis of 3 reported (Organic Lett. 2007, 9, 5357) by Steven D. Burke of the University of Wisconsin was the selective ring-closing metathesis of 1 to 2. The diol 6 that was used to prepare the ketal 1 was readily prepared from the inexpensive D-mannitol 4. Many other applications can be envisioned for the enantiomerically-pure diol 6 and for the monoacetate and bis acetate that are precursors to it. To set up the metathesis, the β, γ-unsaturated ketone 10 was needed. To this end, the keto phosphonate derived from the addition of the phosphonate anion 8 to the lactone 7 was condensed with phenyl acetaldehyde 9. The derived enone 10 was a 5:1 mixture of β, γ- and α, β-regioisomers. The diol 6 is C2 -symmetrical, but formation of the ketal 1 dissolved the symmetry, with one terminal vinyl group directed toward the styrene double bond, and the other directed away from it. On exposure to the first generation Grubbs catalyst, ring formation proceeded efficiently, to give 2. Williamson coupling with the serine-derived alcohol 11 then gave 12. To establish the secondary alcohol of 13 and so of 3, the more electron rich alkene of 12 was selectively epoxidized, from the more open face. Diaxial opening with hydride then gave 13. With 13 in hand, another challenge of selectivity emerged. The plan had been to attach the ester-bearing sidechain to 13 using alkene metathesis, then hydrogenate. As the side-chain of 3 contained an additional alkene, this had to be present in masked form. To this end, the α-phenylselenyl ester 14 was prepared. Alkene metathesis with 13 proceeded smoothly, this time using the second generation Grubbs catalyst. The unwanted alkene was then removed by reduction with diimide, and the selenide was oxidized to deliver the α, β-unsaturated ester.

scholarly journals Riboflavin: The Health Benefits of a Forgotten Natural Vitamin

2020 ◽  
Vol 21 (3) ◽  
pp. 950 ◽  
Author(s):  
Nittiya Suwannasom ◽  
Ijad Kao ◽  
Axel Pruß ◽  
Radostina Georgieva ◽  
Hans Bäumler
Keyword(s):  
Protective Effect ◽  
Toxic Effect ◽  
Biological Effects ◽  
Health Benefits ◽  
Water Soluble ◽  
Medical Conditions ◽  
Protective Properties ◽  
Anti Cancer ◽  
Anti Oxidant ◽  
B Vitamin

Riboflavin (RF) is a water-soluble member of the B-vitamin family. Sufficient dietary and supplemental RF intake appears to have a protective effect on various medical conditions such as sepsis, ischemia etc., while it also contributes to the reduction in the risk of some forms of cancer in humans. These biological effects of RF have been widely studied for their anti-oxidant, anti-aging, anti-inflammatory, anti-nociceptive and anti-cancer properties. Moreover, the combination of RF and other compounds or drugs can have a wide variety of effects and protective properties, and diminish the toxic effect of drugs in several treatments. Research has been done in order to review the latest findings about the link between RF and different clinical aberrations. Since further studies have been published in this field, it is appropriate to consider a re-evaluation of the importance of RF in terms of its beneficial properties.

The effectiveness of outreach testing for hepatitis C in an immigrant Pakistani population

2011 ◽  
Vol 140 (6) ◽  
pp. 1048-1053 ◽  
Author(s):  
H. JAFFERBHOY ◽  
M. H. MILLER ◽  
P. McINTYRE ◽  
J. F. DILLON
Keyword(s):  
Hepatitis C ◽  
Ethnic Diversity ◽  
First Generation ◽  
Venous Blood ◽  
Hcv Rna ◽  
Chronic Hepatitis B Infection ◽  
Pakistani Population ◽  
Targeted Testing ◽  
Set Up ◽  
The City

SUMMARYIn Scotland, an estimated 1% of the population is infected with hepatitis C virus (HCV). There is ethnic diversity in Scotland, with a large Pakistani sub-population. Our aim was to investigate the prevalence of HCV in an immigrant Pakistani population and effectiveness of an outreach testing intervention. We arranged a series of HCV awareness meetings at the mosques and Pakistani Women's centre in the city of Dundee. Thereafter short-term outreach HCV testing clinics were set up in the same venues. Venous blood samples were obtained and tested for HCV IgG and HbsAg. A short questionnaire was also completed. In total, 177 individuals volunteered for testing, out of an estimated 250 who attended meetings and a total Pakistani population in Dundee of 1723. Of those tested 170 were Scottish Pakistanis (159 first generation, 11 second generation). There were 145 (85·2%) men. The mean age was 45·11 (±s.d. 16·7) years. Seven (4·1%) individuals in the cohort were anti-HCV positive. Five (2·9%) were found to have HCV RNA by PCR. Only one patient had chronic hepatitis B infection. All patients with positive results were seen in the liver clinic for consideration of treatment. We have demonstrated that immigrant Pakistanis retain a higher prevalence of HCV compared to the population of their adopted country. Outreach targeted testing in this group can be achieved using religious and cultural gatherings, with only modest investment in staff time.

Biological Effects of Gamma-Rays

1931 ◽  
Vol 37 (3) ◽  
pp. 330-331
Author(s):  
W. G. Whitman ◽  
M. A. Tuve
Keyword(s):  
Gamma Rays ◽  
Biological Effects
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