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"Malaria masih menjadi masalah kesehatan masyarakat dan merupakan penyakit endemis di daerah tropis termasuk Indonesia. Semakin banyaknya strain Plasmodium yang resisten terhadap obat antimalaria membutuhkan penemuan obat baru yang lebih poten untuk mengatasi permasalahan ini. Delonix regia mengandung zat kimia alkaloid dan terpenoid yang memiliki potensi sebagai antiplasmodium. Tujuan penelitian ini adalah untuk membuktikan bahwa ekstrak kulit buah dan daun Delonix regia mampu menurunkan densitas Plasmodium berghei. Kelompok perlakuan mendapatkan ekstrak kulit buah dan daun yang diberikan dengan tiga dosis, yaitu 2,8 mg/20g mencit, 8,4 mg/20g mencit, dan 14 mg/20g mencit selama tiga hari berturut-turut dimulai tujuh hari setelah inokulasi parasit pada Mencit Swiss-webster. Pemeriksaan parasitemia dilakukan pada hari ke-0 sebelum perlakuan dan hari ke-3 setelah perlakuan dengan cara dibuat sediaan apusan darah tipis yang diwarnai dengan Giemsa. Hasil analisis statistik menunjukkan pada dosis ekstrak kulit buah Delonix regia dosis 2,8 mg/20g mencit dan dosis 8,4 mg/20g mencit menunjukkan perbedaan jumlah parasit yang signifikan terhadap jumlah parasit kelompok kontrol negatif, sedangkan pada ekstrak kulit buah Delonix regia dosis 14 mg/20g mencit menunjukkan bahwa tidak ada perbedaan yang signifikan terhadap kelompok kontrol negatif. Hasil analisis statistik pada ekstrak daun Delonix regia dosis 2,8 mg/20g mencit, 8,4 mg/20g mencit dan 14 mg/20g mencit menunjukkan tidak ada perbedaan yang signifikan terhadap kelompok kontrol negatif. Berdasarkan hasil penelitian tersebut dapat disimpulkan bahwa pemberian ekstrak kulit buah Delonix regia dosis 2,8 mg/20g mencit paling baik dalam menurunkan densitas Plasmodium berghei.

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Malaria remains a public health problem and endemic in tropical country, including Indonesia. Increasing number of strains of drug-resistant Plasmodium malaria needs to find a new, more potent drugs to overcome this problem. Delonix regia contains alkaloid and terpenoid chemicals that have potential as antiplasmodium. The purpose of this study is to prove that the rind and leaf extracts of Delonix regia can reduce the density of Plasmodium berghei in Swiss-webster mice. The treatment group get rind and leaf extracts given in three doses, ie 2,8 mg/20g mice, 8,4 mg/20g mice, and 14 mg/20g mice for three consecutive days starting seven days after inoculation of parasites. Parasitemia examination performed on H0 before and day 3 after treatment made by blood smear preparations stained with Giemsa thin.

The results of the statistical analysis showed a dose Delonix regia rind extract dose 2,8 mg/20g mice and 8,4 mg/20g mice showed a significant difference in the number of parasites on the number of parasites negative control group, while in the rind extracts Delonix regia dose 14 mg/20g mice showed no significant difference to the negative control group. The results of statistical analysis on Delonix regia leaf extracts dose 2,8 mg/20g mice, 8,4 mg/20g mice and 14 mg/20g mice no significant difference to the negative control group. Based on these results it can be concluded that administration of Delonix regia rind extract at a dose of 2,8 mg/20g mice body weight is the best dose which can reduce the density of Plasmodium."

"Paduan aluminium seperti 2024 aluminium alloy banyak digunakan pada industri pesawat sebagai bahan penguat struktur dan lapisan sayap pesawat. Tetapi paduan aluminium tersebut rentan terhadap korosi pada aging state tertentu, sehingga aluminium perlu diplating. Nikel merupakan salah satu logam yang sering digunakan sebagai material pelapis karena memiliki sifat ketahanan korosi yang baik, kekerasan dan juga dapat meningkatkan tampilan dari logam yang dilapisi. Dalam penelitian ini, dilakukan proses pelapisan Nikel pada lempeng Aluminium melalui metode electroplating dengan variasi rapat arus sebesar 3 mA/cm2, 10 mA/cm2, dan 25 mA/cm2. Karakterisasi XRD dan SEM dilakukan untuk melihat struktur kristal dan mikrostruktur lapisan nikel. Uji kekerasan dilakukan dengan metode Vickers. Uji sifat korosi dilakukan dengan metode LSV (Linear Sweep Voltamettry). Pola difraksi sinar-X menunjukkan peningkatan intensitas bidang (111) dan bidang (002) seiring meningkatnya rapat arus, sedangkan intensitas bidang (022) mengalami penurunan. Pengolahan data LSV menunjukkan sampel dengan arus 25 mA cm-2 memiliki daya tahan korosi yang paling baik yaitu sebesar 0,157 mm/tahun, tetapi memiliki tingkat kekerasan yang paling rendah sebesar 416,6 VH. Perubahan rapat arus ditemukan dapat mempengaruhi struktur kristal, morfologi permukaan dan sifat elektrokimia lapisan nikel yang terdeposisi.

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Aluminium alloys such as 2024 aluminium alloys are widely used in aircraft industry as structural sthrength and skin for wings. However, those alloys are susceptible to corrosion at certain aging state, hence plating is necessary. Nickel is one of metal that widely used as coating material due to their high corrosion resistance property, hardness and enhancing the metal’s surfaces. In the current study, Nickel was successfully deposited on the Aluminium surface by electroplating method with various current density which are 3 mA/cm2, 10 mA/cm2, and 25 mA/cm2. XRD and SEM was performed to see the crystal structure and microstructure of the plated nickel coating. Hardness test was performed using Vikers method. The corrosion property was tested by LSV (Linear Sweep Voltamettry) method. The XRD patterns show increasing intentisy of (111) and (002) plane along the increase of current density, while the (022) intensity decreasing. The LSV shows that the sample with 25 mA cm-2 current density has the highest corrosion resistance with value of 0.157 mm/year, but it has the lowest hardness value at 416.6 VH. It was found that the variation of current density can affect crystal structure, surface morphology and electrochemical property of the deposited nickel coating."

"This book deals with the application of density matrix theory to atomic and molecular physics. The aim is to precisely characterize sates by a vector and to construct general formulas and proofs of general theorems. The basic concepts and quantum mechanical fundamentals (reduced density matrices, entanglement, quantum correlations) are discussed in a comprehensive way. The discussion leads up to applications like coherence and orientation effects in atoms and molecules, decoherence and relaxation processes. This third edition has been updated and extended throughout and contains a completely new chapter exploring nonseparability and entanglement in two-particle spin-1/2 systems. The text discusses recent studies in atomic and molecular reactions. A new chapter explores nonseparability and entanglement in two-particle spin-1/2 systems."

"Air-photos can be used for aiding various investigations. It is due to the special characteristics of air-photos themselves and their high relevancy to various field of study. So far air-photos are mostly used for studying physical problems. The following paper is to introduce the use of air-photos in the framework of studying urban population density. By employing air-photos as auxiliary tools of analysis, urban population density can be more clearly presented and can be divided into three types. The first type is commonly used in urban study, while the second and the third type are rarely presented. Based on the survey carried can give clearer and representative picture about the study area. Consequently, the second and the third concept of population density are really recommended in any urban study."

"ABSTRAKHasil eksperimen pada feromagnetis TiO2 yang didopinging dengan beberapa elemen tanah jarang menjadi topik yang diminati sebagai bahan semikonduktor feromagnetis diatas suhu kamar. TiO2 mengalami perubahan sifat material dari nonmagnetis menjadi magnetis akibat adanya formasi vakansi Ti yang diinduksikan penambahan atom Ta. Mekanisme terjadinya sifat feromagnetis diduga akibat interaksi Ruderman-Kittel-Kasuya-Yosida RKKY . Dalam penelitian ini, kami melakukan studi teoritis untuk memprediksi suhu Curie feromagnetis dari sistem berdasarkan kesimpulan-kesimpulan dari studi-studi sebelum ini. Kami menggunakan algoritma metode Dynamical Mean Field Theory DMFT yang mengambil hasil perhitungan Density Functional Theory DFT untuk memberikan nilai-nilai parameter fisis yang sesuai dengan keadaan material sebenarnya. Hasil penelitian ini menunjukkan bahwa TiO2:Ta memiliki bentuk semikonduktor tipe-n dan besar TC dari TiO2:Ta berkisar antara 480 - 596 K.

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ABSTRACTRecent experimental reports on ferromagnetism in TiO2 doped with certain rare earth elements have renewed interest in the search of optimal room temperature ferromagnetic semiconductors. TiO2 undergoes a change in its properties from nonmagnetic to magnetic which is attributed to formation of Ti vacancies induced by the addition of Ta atoms. The mechanism leading to ferromagnetic is believed to be governed by Ruderman Kittel Kasuya Yosida RKKY . Here we conduct a theoretical study to calculate and predict the ferromagnetic Curie temperature of the system based on conclusions of previous studies. We use Dynamical Mean Field Theory DMFT algorithm which employs result of Density Functional Theory DFT calculation to provide the proper physical parameters. Our results show that TiO2 Ta has a n type semiconductor and has TC value ranges from 480 to 596 K."

"Prevalence rate kusta di Kecamatan Talango tergolong tinggi (10,99 per 10000 penduduk tahun 2012). Penelitian ini bertujuan untuk menganalisis hubungan antara kepadatan hunian dengan kejadian kusta di Puskesmas Kecamatan Talango 2014. Desain penelitian yang digunakan adalah kasus kontrol. Hasil penelitian menunjukkan bahwa ada hubungan antara kepadatan hunian dengan kejadian penyakit kusta (p=0,000, OR=7,87). Variebel lain yang bermakna secara statistik adalah riwayat kontak serumah, lantai rumah, ventilasi. Sedangkan variabel pendidikan, pekerjaan, penghasilan, sarana air bersih, personal hygiene, dan dinding rumah tidak memiliki hubungan yang signifikan terhadap kejadian kusta. Setelah dianalisis lebih lanjut, ada hubungan kepadatan hunian dengan kejadian kusta setelah dikontrol konfounding (pendidikan, lantai rumah, dinding rumah, ventilasi) di Kecamatan Talango 2014.

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Prevalence rate of leprosy in the Talango Subdistrict is high (10.99 per 10,000 population in 2012). This study aimed to analyze the relation between residential density and leprosy occurrence in Talango Subdistrict 2014. Study design used is case control. The results showed that there is a relationship between dwelling density and the occurrence of leprosy (p Value =0.000, OR=7.87). Another variebel that statistically significant is the history of household contact, the floor of house, and ventilation. While the variable of education, occupation, social economy, clean water resource, personal hygiene, and the walls of the house do not have a significant relationship to the occurrence of leprosy. Upon further analysis, there is relation of dwelling density with the occurence of leprosy after controlled by confounder factors (namely: education, floor of house, wall of house, and ventilation) in District Talango 2014."