Coercive force of double layer ferromagnetic materials

Peculiarities of the coercive force (CF) measuring of inhomogeneous ferromagnetic materials, in particular layered ones, are considered. The concept of effective CF of layered ferromagnetic materials is introduced. The analysis of the magnetic fluxes distribution in a double layer ferro-magnetic material during its reversal magnetization by an attachable transducer with a U-shaped core made of soft magnetic material is carried out. An analytical expression of the effective CF for such class of materials for the case of the same layers’ thickness and linear approximation of their demagnetization curves is obtained. It was found that the effective CF of a double layer ferromagnetic material is determined not only by the CF of its individual layers, but also by the values of their residual induction. Experimental verification of the obtained results was performed on experimental samples, which were collected from steel 08kp (sample # 1) and steel St3 (sample # 2) plates. Each of the samples was a stack of 6 plates each measuring 87×50×1 mm. With tight compression of the plates and complete elimination of the gaps between them, these samples can be considered as single layer ferromagnetic structures with a thickness of 6 mm. To model a double layer ferromagnetic material with the same layer thickness, sample № 3 was used. Its the upper part consisted of the three steel 08kp plates and the lower part – of the three steel St3 plates. To measure the magnetic parameters of these samples the KRM-Ts-MA type magnetic analyzer was used. The device permit to measure the CF, residual induction and other parameters of the hysteresis loops of ferromagnetic materials in the closed magnetic circuit by attachable type transducers with U-shaped core. The transducer used with the magnetic analyzer during the experiments had poles with an area of 16×32 mm and the distance between the edges of the poles: inner – 32 mm, outer – 64 mm. It is shown that the discrepancy between the calculated value of the effective CF of the double layer ferromagnetic material (sample # 3) from steel 08kp and St3 according to the obtained expression and the measurement results is about 3%. This confirms the adequacy of the proposed model of reversal magnetization of double layer ferromagnetic material and the correctness of analytical calculations.

Time-of-flight fission fragment spectrometer of the MAVR facility

A time-of-flight system was created to register the reaction products and perform correlation measurements on a high-resolution magnetic analyzer (MAVR). The facility is located on the channel of the extracted beam of the U-400 cyclotron at the Laboratory of Nuclear Reactions JINR. The results of measuring the parameters of the time-of-flight spectrometer obtained on the basis of measuring the spontaneous fission fragments velocities of 252Cf are described. In addition, the results of the measurement of fission fragments in the 48Ca+238U reaction are presented. In this case, two time-of-flight arms were used, with the help of it is planned to carry out correlation measurements of induced fission fragments of a complex system. The created system also makes it possible to carry out correlation (three particles) measurements of fission fragments with particles registered in the focal plane of the MAVR magnetic spectrometer. Another purpose of the described system is to register elastically scattered ions, which is used as a monitoring system for the quality and composition of the beam hitting on the target of the MAVR facility.

Research into phosphate mineral composition and waste phosphorite ore

Purpose. Theoretical and experimental studies of chemical and mineral composition and the structure peculiarities of phosphorites from Ukrainian deposits to define the degree of their suitability for other industries. Methods. The ore chemical composition was determined by conventional (wet) analysis using standard certified chemical reagents. The mineral composition was studied on the scanning electron microscope equipped with the attachment for the energy-dispersive electron microprobe analysis (EMPA) with the software for calculating the chemical composition of the studied sample microvolume. The petrographic analysis was carried out by the traditional methods of microscopic section preparation with subsequent identification and description of the minerals. The microscopic study of the original ore samples aimed at their mineral composition determination was conducted on the Nu optical microscope (Germany) both in transmitted and reflected light. The thin and polished sections prepared using the standard technology were used as samples. In the laboratory environment, the phosphorites were subjected to magnetic dressing in magnetic fields with different intensity. The experiments in the weak field were modelled with the help of the magnetic analyzer while the experiments in the strong magnetic field were modelled on the rotor separator. The flotation dressing method was studied on the laboratory mechanical flotation machine. Findings. It was found that phosphate nodules are rounded mineral formations of irregular shape; they consist of sand bound with the yellow-brown phosphate cement. Ore useful substance is a phosphorus-bearing mineral that by the element chemical composition corresponds to fluorocarbon-hydroxyl-apatite with the dominant content of Ca (45.23%), P (15.67%), and B (27.87%). The results of the integrated petrographic study of the phosphorite samples from the ore body of “Peremoha” area are presented. Originality.The study has revealed that phosphorus-containing substance in the phosphorite samples is the mass that cements barren minerals (mainly quartz, glauconite, calcite and plagioclase). Practical implications. According to the phosphate content level, the phosphorites from Malokamyshevatske, Iziumske and Sinichino-Yaremovske deposits can be treated as minerals for ferrophosphorus smelting. Keywords: ferrophosphorus, ore substance, phosphorite, mineral varieties, petrography, apatite

Pemeriksaan Indeks Memori, MMSE (Mini Mental State Examination) dan MoCA-Ina (Montreal Cognitive Assestment Versi Indonesia) Pada Karyawan Universitas Yarsi

Penelitian ini bertujuan untuk memeriksa indeks memori melalui alat QRMA (Quantum Resonance Magnetic Analyzer) ,pemeriksaan MMSE (Mini Mental State Examination) dan MoCA Ina (Montreal Cognitive Assestment versi Indonesia) terhadap karyawan Universitas YARSI. Hasil penelitian Indeks Memori terhadap 30 karyawan Univerisitas YARSI secara QRMA diperoleh nilai normal (Z score 0,442 – 0, 871) adalah 9 orang (30%) , menurun ringan 17 orang (56,67%) dan menurun sedang-berat 4 orang (13,33%). Selanjutnya hasil analisa MMSE dengan nilai normal (26 sampai 30) adalah 18 orang (60%) dan penurunan ringan 12 (40%) . Adapun analisa secara MoCA Ina dengan nilai normal (26 sampai 30) menunjukkan tingkatan normal 9 orang (30%), menurun ringan 17 orang (56,67%) dan menurun sedang-berat 4 orang (13,33%). Dari ketiga parameter di atas terdapat 7 orang (23,33%) dengan semua pemeriksaan menunjukkan hasil yang normal. Terdapat 11 orang (36,67%) dari ke tiga hasil pemeriksaan menunjukkan penurunan fungsi kognitif dan penurunan indeks memori terutama pada mereka yang berusia di atas 45 tahun. Selanjutnya 10 orang (33,33%) dengan ke dua parameter pemeriksaan yang mengalami penurunan, serta 2 orang (6,67%) dengan satu parameter pemeriksaan mengalami penurunan memori. Berdasarkan kepustakaan, usia berhubungan dengan penurunan fungsi memori/daya ingat. Tapi pada penelitian ini kami menemukan responden usia kurang dari 40 tahun mengalami penurunan kognitif pada ke 3 parameter terutama fungsi atensi dan fungsi visuo spatial. Pemeriksaan MMSE terutama untuk menilai fungsi kognitif secara umum (fungsi atensi, bahasa,memori/daya ingat, visuo spatial dan fungsi eksekutif. Sedangkan MoCA Ina merupakan parameter untuk menilai gangguan fungsi kognitif dengan kekhususan fungsi atensi dan visuo spatial. Dari pemeriksaan Indeks memori secara QRMA, pemeriksaan MMSE dan pemeriksaan MoCA Ina, menunjukkan telah terjadi penurunan indeks memori pada karyawan yang umumnya berusia lebih dari 45 tahun, hal ini di pastikan akibat adanya sel neuron yang mengalami degeneratif akibat pengaruh stres oksidatif sehingga berpengaruh terhadap kualitas kesehatan secara keseluruhan.

Screening Kesehatan Sistem Reproduksi Perempuan Menopause Di Satu Gereja, Di Tangerang

Walaupun menopause adalah hal normal pada perempuan diatas umur 50 tahun, namun dijumpai data kecemasan menghadapi menopause pada perempuan di Tangerang Selatan. Dampaknya perempuan enggan memeriksakan kesehatan sistem reproduksi karena mempunyai persepsi tidak perlu periksa kesehatan jika tidak sakit. Fenomena tersebut juga dijumpai di salah satu gereja di Tangerang dimana setiap minggu diketahui ada perempuan sakit dan dirawat di rumah sakit. Oleh karena itu perlu dilakukan screening kesehatan reproduksi pada perempuan menopause. Metode screening sistem reproduksi perempuan menopause (n=30) untuk mendeteksi peredaran darah jantung - otak, syaraf otak, kepadatan tulang, kadar gula dalam darah, organ reproduksi melalui alat Quantum Resonance Magnetic Analyzer dengan tiga kategori hasil risiko, hati-hati, dan aman. Hasil: diketahui usia ≥ 60 tahun (50%) dengan kategori ‘hati-hati’ diketahui masalah paling dominan yaitu gangguan peredaran darah di jantung - otak (96,67%), sedangkan pada kategori ‘risiko’ gangguan paling dominan yaitu ‘tingginya gula dalam darah (76.67%). Lalu hasil dilaporkan kepada dokter klinik gereja untuk memberikan rujukan ke rumah sakit. Kesimpulan: responden tersebut mempunyai kecenderungan mengalami masalah penurunan fungsi kognisi seperti cepat lupa disertai penyakit degeneratif pada lanjut usia: Diabetes Melitus, Dementia, dan Osteoporosis. Rekomendasi diperlukan literature review tentang dampak menopause terhadap kejadian penyakit degeneratif.

The CORRELATION OF BLOOD SUGAR LEVELS WITH THE ELASTICITY OF CORONARY ARTERIES

Coronary arteries are blood vessels that carry oxygen and nutrients to the heart muscle. These vessels can experience constriction due to the accumulation of plaque which causes atherosclerosis. Atherosclerosis is characterized by reduced coronary artery elasticity. Blood glucose levels are one of the factors that cause atherosclerosis. The aims of this study was to determine whether there was a correlation of blood sugar levels with the elasticity of coronary arteries. This study is an analytical study with cross sectional design. The population in this study were all patients who visited the Gipateda Tulungagung treatment clinic that was more than 30 years old and female. Through accidental sampling technique, 30 respondents were obtained. The study was conducted from March 1, 2016 to May 1, 2016. Data was collected using a quantum resonance magnetic analyzer (QMRA) to determine the value of blood sugar levels and the value of elasticity of coronary arteries. The data obtained were analyzed statistically by bivariate linear regression tests to determine whether there was a significant correlation of blood sugar levels with the elasticity of coronary arteries. The results showed that the p value is 0.000 < 0.05, which means that there was a significant correlation between blood sugar levels and the elasticity of the coronary arteries. High blood glucose levels can damage the vascular endothelium and also increasing platelet agegrat, so that can resulting atherosclerosis. Every individual should be able to control blood sugar levels with a healthy lifestyle and early detection regularly to prevent the decrease of coronary arteries elasticity because that can lead to coronary heart disease (CHD).

The CORRELATION OF BLOOD SUGAR LEVELS WITH THE ELASTICITY OF CORONARY ARTERIES

Coronary arteries are blood vessels that carry oxygen and nutrients to the heart muscle. These vessels can experience constriction due to the accumulation of plaque which causes atherosclerosis. Atherosclerosis is characterized by reduced coronary artery elasticity. Blood glucose levels are one of the factors that cause atherosclerosis. The aims of this study was to determine whether there was a correlation of blood sugar levels with the elasticity of coronary arteries. This study is an analytical study with cross sectional design. The population in this study were all patients who visited the Gipateda Tulungagung treatment clinic that was more than 30 years old and female. Through accidental sampling technique, 30 respondents were obtained. The study was conducted from March 1, 2016 to May 1, 2016. Data was collected using a quantum resonance magnetic analyzer (QMRA) to determine the value of blood sugar levels and the value of elasticity of coronary arteries. The data obtained were analyzed statistically by bivariate linear regression tests to determine whether there was a significant correlation of blood sugar levels with the elasticity of coronary arteries. The results showed that the p value is 0.000 < 0.05, which means that there was a significant correlation between blood sugar levels and the elasticity of the coronary arteries. High blood glucose levels can damage the vascular endothelium and also increasing platelet agegrat, so that can resulting atherosclerosis. Every individual should be able to control blood sugar levels with a healthy lifestyle and early detection regularly to prevent the decrease of coronary arteries elasticity because that can lead to coronary heart disease (CHD).

Detection of polysaccharides in Ganoderma lucidum extracts

Introduction: Ganoderma lucidum is one of the most worldwide known medicinal mushrooms. However, this species of mexican mushroom has notable differences compared to its similar one since it has not been studied enough so it is important to determine its characteristics once it has been cultivated and its extracts have obtained in a standardized form.Method: The polysaccharides of the extracts of Ganoderma lucidum strain CP-145 were measured by the quantum magnetic resonance analyzer MARSIII of Bruce Copen (MARSIII), a proposed technique to estimate values of compounds in the agricultural area, these results were compared with two standardized techniques: Fehling method of sugar reducers and Gas Chromatography - Mass spectrometry (GC-MS), the extracts to be measured were obtained from the traditional culture of basidiocarps (control) and extract of basidiocarps added with acetylsalicylic acid (ASA).Results: The results for the MARSIII quantum magnetic analyzer were 4.967 ± 1.016 and 8.110 ± 1.416% in control extract and extract added respectively, by the Fehling´s method 8.784 ± 2.019% and 41.326 ± 1.430% in control extract and extract added respectively, for CG- MS 7.050 ± 1.527 and 18.456 ± 2.937% in control extract and extract added respectively. Discussion and Conclusion: Significant differences were found on the Fehling´s techniques and on the GC-MS for both extracts, but not in the MARSIII analyzer detection, which indicates that it is not an adequate method to detect variations in the concentrations of polysaccharides in this type of extracts.

The Effect of Music towards the Reducing of Stress Levels in Young People

These quasi-experiment research aims to identify any effect of music activities as media to reduce stress hassle on the subject which attend in the choir group. The musical repertoire which was used was the pop genre which technically did not have much complexities and the lyric straightforward to understand. Hassle stress is a stressor that involves minor everyday events such as traffic jam, activities of queuing, forgetfulness in putting the things, or turmoil. Manipulation or treatment treated to the subject as a member of the choir is totally N=10. The treatment was the singing rehearsal. The tools for collecting data were a questioner of self-report which contained questions and QRMA (Quantum Resonance Magnetic Analyzer) measurement which also focused on group discussion. The result shows that there is an effect of musical activities as media for reducing the stress hassle and promoting the previous research results. Some analysis shows that there should be an experiment with a different musical repertoire because a difference genre needs a different skill and there should be a necessity to measure a physical condition more accurately by QRMA to all participants.