The in vitro study demonstrates wirelessly controlled modulation of neural activity using magnetoelectric nanoparticles (MENPs), synchronized to magnetic field application with a sub-25-msec temporal ...response. Herein, MENPs are sub-30-nm CoFe2O4@BaTiO3 core-shell nanostructures. MENPs were added to E18 rat hippocampal cell cultures (0.5 μg of MENPs per 100,000 neurons) tagged with fluorescent Ca2+ sensitive indicator cal520. MENPs were shown to wirelessly induce calcium transients which were synchronized with application of 1200-Oe bipolar 25-msec magnetic pulses at a rate of 20 pulses/sec. The observed calcium transients were similar, in shape and magnitude, to those generated through the control electric field stimulation with a 50-μA current, and they were inhibited by the sodium channel blocker tetrodotoxin. The observed MENP-based magnetic excitation of neural activity is in agreement with the non-linear M − H hysteresis loop of the MENPs, wherein the MENPs’ coercivity value sets the threshold for the externally applied magnetic field.
•A study through a reduced in vitro model (on E18 rat hippocampal cell cultures) for the first time demonstrates how 30-nm MENPs can be used to wirelessly induce neural activity via application of magnetic fields, with a sub-25-msec temporal response.•The property of the nanoparticles such as the magnetic coercivity is used as a wireless switch to activate action potential in selected regions.•The validity of MENPs-based neural firing approach is confirmed through different positive and negative control measurements.•The importance of having MENPs adequately dispersed to ensure the desired wireless neural firing control operation is being demonstrated.
The purpose of this study is to find out the comparison of peer teaching and individual training practice methods to improve the ability of forehand topspin table tennis in Student Activity Unit ...Table Tennis. This study is based on a finding during practice; a coach often has difficulty in coaching athletes who are new to table tennis. Athletes are not fond of the basic blows that should be mastered; one of the blows that has to be mastered is a forehand topspin blow. In the Student Activity Unit Table Tennis exercises are usually done using multyball exercises. The trainer only gives a large number of ball reflections without a movement evaluation so that the exercises are not effective and only result tiredness and unsuitable movements of forehand topspin biomechanics. The population in this study is all members of Student Activity Unit Table Tennis with the number of 20 people, 10 people in the peer teaching experimental group and 10 others in the individual training experimental group. This research method used is pre-experiment method with pretest-posttest design of static group. Data are obtained by skill test with the test instrument forehand topspin. Based on the data analysis using the application SPSS 17 for windows, both experimental groups show significant improvement and the peer teaching experimental class more significantly increase the forehand topspin ability by an average of 0.521 with medium criteria.
This research background is based on observations in the field, both at the time of training and only some work that is still lacking from the technique in the connection between all the accuracy and ...distance carried out by the students. The research was conducted to find out the effect of double leg cone hop plyometric exercise on long pass accuracy in soccer, student soccer school BASIS FC U-15. Double leg cone hop plyometric exercise is a form of exercise to maximize the muscle strength of the legs of an individual who does it. This research uses an experimental method with one-group pre-test and post-test design. This research population is student soccer school BASIS FC U-15. Where in experiments using paired sample t-test, the value of P value (sig.2 tailed) is 0,000. Therefore 0,000 < α = 0,05 so H0 rejected and H1 accepted. So there is a significant influence given to double leg cone hop plyometric exercise to the long pass accuracy in soccer. The SSB students who initially when did long pass accuracy in soccer not reach on target and did not accurate, with given the double leg cone hop plyometric exercises students were able to reduce these errors.
In this study discusses the role of google form applications on the internet in determining the amount of energy released by the body during physical activity. It can be calculated in various ways, ...one of the kinds is by filling out the IPAQ (International Physical Activity Questionnaire) on the google form application. This study aims to determine the amount of energy expenditure when doing physical activity for Physical Education students with uses descriptive research methods. The sample were students of Physical Education department with total 84 students with determination of the sample in this study is by purposive sampling technique. The results of using the google form application on the internet to measure energy expenditure during physical activity can provide a percentage presentation and effectively can help measuring things of the overall intensity categories found in physical activity.
This study was conducted to determine the slaughter, carcass, and egg quality characteristics of domestic geese reared in Usak, Afyon, and Kutahya provinces of the Aegean region. Ninety-six eggs were ...obtained from 38- to 44-week-old geese from four locations in each province. Slaughter and carcass characteristics were recorded for 48 female and male geese between 28 and 32 weeks old. Heavier eggs were produced in Afyon and Kutahya than in Usak. Shape index, eggshell ratio and thickness, and yolk colour were significantly different between provinces. Birds from Kutahya were lighter at slaughter than those from Usak and Afyon. This difference was also manifest in the weights of hot and cold carcass, blood, neck, wing, leg, breast, and back. The weights of blood, feathers, liver, gizzard, heart and neck varied significantly relative to cold carcass weight between provinces. Male geese were significantly larger than females in all respects except for liver weight. Because females weighed less, the various ratios to cold carcass weight were significantly greater than for males. Interestingly, the relative weight of the breast was significantly greater for males than for females. These differences among provinces might be attributable to environmental factors and genetic differences among the geese themselves. Keywords: Aegean provinces, breeder conditions, carcass traits, egg quality, geese liver
Background: Acute mastoiditis is a suppurative infection of mastoid air cells and is the most common intratemporal complication of otitis media. Aim: This study aimed to evaluate the demographic and ...clinical characteristics and treatment outcomes of children with acute mastoiditis (AM). Patients and Methods: We retrospectively reviewed the medical records of hospitalized pediatric patients aged between 1 month and 18 years with a diagnosis of AM between May 2015 and December 2021. Results: A total of 28 hospitalized children with AM were enrolled in this study, of whom 22 (78.6%) were males and 6 (21.4%) were females with a mean ± standard deviation age of 93.5 ± 53.2 months (range = 6 months-16.1 years). The most common clinical symptoms were postauricular erythema (n = 17, 60.7%), tenderness (n = 16, 57.1%), swelling (n = 14, 50%), fever (n = 14, 50%), and auricular protrusion (n = 7, 25%). Mastoiditis complications occurred in 10 (35.7%) children. The most common extracranial complication was subperiosteal abscess (n = 8, 28.6%). The erythrocyte sedimentation rate (ESR) and the rate of antibiotic use before hospitalization were higher in patients with complicated mastoiditis (P = 0.006 and P = 0.039, respectively). Surgery was performed in 12 (42.9%) patients. Statistically, more surgical interventions were performed in patients who developed complications (P = 0.003). Conclusion: AM continues as an important disease of childhood. Successful results are obtained with systemic antibiotic therapy and additional surgical intervention as necessary. A careful evaluation of patients with a high ESR and those who received antibiotic therapy before hospitalization is appropriate due to the correlation between these factors and the risk of complication development.
Summary
Paraoxonase and arylesterase enzymes are corner stones of antioxidant defence. We aimed to compare azoospermic infertile men and normozoospermic individuals with respect to total antioxidant ...status (TAS), total oxidant status (TOS), oxidative stress index (OSI), paraoxonase and arylesterase levels in the blood and seminal plasma. Two‐hundred consecutive infertility patients and voluntarily participated were included. In the normozoospermic group, TAS, PON, arylesterase values were statistically significantly higher when compared with those in the azoospermic group, while lower TOS and OSI levels were observed in the blood and seminal plasma of azoospermic group. In the semen analyses of normozoospermic group, the correlation between semen volume, sperm concentration, sperm motility and morphology and TAS, TOS, OSI, PON and arylesterase values was examined. A negative correlation was determined between semen volume and OSI. Levels of serum oxidative parameters were higher in the azoospermic group relative to normozoospermic group, but antioxidant parameters were lower than those of the normozoospermic group. Oxidative stress performs an essential role in the aetiology of male infertility by negatively influencing sperm quality and function. Assessment of blood and seminal plasma oxidative profiles might be an important tool to better evaluation of sperm reproductive capacity and functional competence.
It is known now that an increase in tumor temperature decreases the tumor resistance to chemo- and radiation therapies. Hyperthermia treatment of the tumor cells where damage to the healthy cells can ...be avoided is viable by using magnetic nanoparticles with controlled Curie temperatures. Nickel-Chromium (Ni1-x Crx) particles with varying compositions have been investigated as thermoseeds for use in localized self controlled hyperthermia treatment of cancer. A series of Ni1-x Crx alloys, have been prepared to find the specific composition which has Curie temperature around 316-317 K. The samples were cast by arc melting technique, and were annealed at 850 oC for 5 hours in sealed quartz tubes. Magnetic properties of the samples were investigated, including Curie temperature, saturation magnetization and hysterisis using Superconducting Quantum Interference Device (SQUID) and Vibrating Sample Magnetometer (VSM). The Curie temperatures of the alloys were found to decrease almost linearly from 401 K to 289 K as the Cr concentration was increased from x = 4.54 wt% to x = 5.90 wt%. The results showed that Ni1-x Crx alloys might be good candidates for self regulating magnetic hyperthermia applications.
Knowledge of oilseeds plants’ traits and features is fundamental to understanding the natural selection process and improving conservation programs through species selection. As a forest oilseed, ...Ricinodendron heudelotii is the object of growing interest among value chain actors, who are increasingly interested in its intrinsic characteristics. To date, there is a lack of information on plant morphological traits for the selection of the best genotype, especially as far as seed and kernel traits are concerned. The aim of this study was to make a typology and establish the relationship between seed and kernel traits of Ricinodendron heudelotii, depending on provenances represented by wild populations of trees in southern Benin. We sampled the provenances constituted equally and per tree, ten random samples each of fruits, seeds, kernels, and shells were collected for measurement. Hierarchical classification, common component analysis, Pearson’s, and Chi-square association tests were performed for statistical analysis. Substantial variation between seed and kernel traits was observed between and within provenances. High coefficients of variation for the quantitative descriptors (length, width, and mass) of seeds and kernels appear to be the essential traits that discriminate the plant into two morphotypes. Furthermore, seed and kernel characteristics show a significant positive correlation with these discrimination criteria. The upper morphotype contains accessions from three provenances with huge seeds and kernels but few seeds per fruit, while the lower morphotype includes the other provenances with tiny seeds and kernels. The results of the study provided essential information that could be an avenue for improvement with further biochemical and molecular characterization studies.
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