Influence of Room-Temperature Ionic Liquids on the Electrosynthesis of CuBDC Type Metal-Organic Frameworks: Crystallite Size and Productivity

The influence of imidazolium- and ammonium-based room-temperature ionic liquids (RTILs) i.e., [bmim][BF₄], [bmim][DCA], and MTBS, respectively, as electrolytes on the crystallite size and productivity of CuBDC (BDC=1,4-benzenedicarboxylate) type metal-organic frameworks (MOFs) by electrosynthesis method via anodic dissolution was investigated. CuBDC was characterized by Fourier transform infrared spectroscopy (FTIR), powder X-ray diffraction (PXRD), scanning electron microscopy (SEM), thermogravimetric analysis (TGA), and nitrogen physisorption. The crystallite size and productivity of CuBDC using [bmim][BF₄], [bmim][DCA], MTBS as electrolytes were 24.7 nm, 22.1 nm, 20.5 nm, and 236 mg/h, 69 mg/h, 291 mg/h, respectively. Bulkier structure of ammonium-based RTILs resulted CuBDC with a smaller crystallite size and higher productivity compared to imidazolium-based RTILs

HUBUNGAN PENGETAHUAN DAN DUKUNGAN SUAMI TERHADAP MINAT IBU DENGAN PENGGUNAAN AKDR

World Health Organization (WHO) menjelaskan bahwa Keluarga Berencana (KB) adalah sebuah tindakan yang membantu pasangan suami istri untuk menghindari kelahiran yang tidak diinginkan. Dukungan suami sangat dibutuhkan bagi wanita usia subur terutama tentang alat kontrasepsi IUD bagi pasangan usia subur, sehingga PUS memiliki alternative memakai alat kontrasepsi. Kontrasepsi tidak dapat dipakai istri tanpa adanya kerjasama suami dan saling percaya. Penelitian ini bertujuan untuk melihat hubungan pengetahuan dan dukungan suami terhadap minat ibu dengan penggunaan Alat Kontrasepsi Dalam Rahim di Kenagarian Simbungo. Jenis metode penelitian adalah kuantitatif menggunakan desain cross sectional dan dilakukan di Kenagarian Simbungo di bulan Maret 2022. Sampel terdiri dari 50 responden. Pengambilan sampel dengan teknik total sampling. Pengolahan data menggunakan analisis univariat dan analisis bivariate dengan uji statistic chi-square. Hasil pada penelitian ini diperoleh hasil yaitu lebih dari separuh (58,0 %) responden memiliki pengetahuan kurang, 54,0 % responden memiliki dukungan suami yang tidak mendukung dalam pemilihan AKDR, dan 62,0 % responden memiliki minat yang rendah dalam pemilihan AKDR Hasil analisis pengetahuan dan dukungan suami dengan minat ibu dalam pemilihan AKDR didapatkan nilai p value = 0,000 (p<0,05) menunjukkan adanya hubungan yang bermakna. Disimpulkan bahwa, terdapat hubungan yang bermakna antara pengetahuan dan dukungan suami dengan minat ibu dalam pemilihan AKDR. Kepada petugas KB untuk meningkatkan pemberian penyuluhan kepada ibu-ibu agar tetap aktif menggunakan kontrasepsi dan memberikan pemahaman kepada masyarakat akan pentingnya penggunaan kontrasepsi terutama alat kontrasepsi dalam rahim (AKDR)

Rekonstruksi Gambar Sinyal EKG dari Gambar Digital 2 Dimensi Menjadi Grafik Sinyal EKG 1 Dimensi

Intisari--- Elektrokardiografi (EKG) merupakan alat penting yang dapat mencetak hasil kerja jantung manusia dalam bentuk sinyal pada lembaran-lembaran kertas. Hasil printout EKG kemudian digunakan para dokter dalam memperlajari kondisi kesehatan jantung manusia. Kerumitan dalam pembacaan dan efesiensi penyimpanan berkas rekam EKG secara manual menarik perhatian para peneliti untuk melakukan digitalisasi kertas EKG. Diharapkan digitalisasi sinyal ekg dapat membantu mempermudah dokter dan para calon dokter dalam membaca, mengidentifikasi penyakit, dan menyimpan rekam medis pasien penyakit jantung. Penelitian ini dilakukan untuk membuat sebuah sistem perangkat lunak yang dapat melakukan digitalisasi sinyal EKG pada lembar kertas EKG dengan memanfaatkan pengolahan citra sederhana menggunakan aplikasi Matlab. Pengolahan citra sederhana adalah kontras dan brightness, grayscale, dan pengolahan data nilai menjadi grafik sinyal. Secara pengamatan, perangkat lunak yang dibuat dapat menghasilkan output berupa gambar grafik sinyal ekg yang sama persis dengan gambar sinyal pada kertas ekg yang asli.Kata kunci--- Elektrokardiografi (EKG), digitalisasi, pengolahan citra, kontras, brightness, rekonstruksi. Abstract--- Electrocardiography (ECG) is an important tool that can print the human heart’s work  to papers.  ECG paper used to identifing the human heart’s condition. Complexity of conventional ECG readings and storage ECG record are earn the attention of researchers to carry out rocord of ECG signal on the paper to digitalization. ECG signal digitization is expected to help doctor or medical student when reading, identifing heart disease, and storing medical records of heart disease patient. This study will create a software that can digitizing the ECG signal using a simple image processing with Matlab application software. The simple image processing is like contrast and brightness, grayscale, and processing data into a signal graphic. By observation, the system could created a graphic signal of ECG as same as the original signal image in the paper of ECG.Keywords--- Electrocardiograph (ECG), digitization, image processing, contrast, brightness, reconstruction

Microwave-Assisted Synthesis of DUT-52 and Investigation of Its Photoluminescent Properties

A zirconium metal-organic framework (MOF) of DUT-52 (DUT: Dresden University of Technology) was synthesized herein by reacting zirconium tetrachloride (ZrCl4) and 2,6-naphthalenedicarboxylic acid (H2NDC) in DMF under microwave heating at 115 oC for 25 min. This synthetic procedure was more efficient than a solvothermal method, by which a long thermal exposure (24 h) of 100-150 oC was required to produce the same MOF. The MOF has a thermal stability of 560 °C, prior to partial loss of interconnected 2,6-naphthalenedicarboxylate (NDC) linkers at some structure building units (SBU). Crystallinity of this DUT-52 was ca. 77 %, which was the same as one synthesized solvothermally.  Diffuse Reflectance UV-Vis spectra revealed an absorption at λex of 287 nm, which was equivalent to a bandgap energy of 4.32 eV.  Electron excitations of this DUT-52 at 275 and 300 nm gave emission wavelength of 433 nm (a purple region),  indicating a prospective use of DUT-52 as a photoluminescent material. Copyright © 2019 BCREC Group. All rights reserve

Ring-Opening of Oxiranes using Taeniolite-Supported Tris(β-Diketonato)Zirconium

A series of tris(β-diketonato)zirconium(IV) complexes were immobilized into a synthetic clay structure of Taeniolite by an ion-exchange method to generate organic/inorganic hybrid compounds. The hybrid compound served as a good catalyst for ring-opening reactions of methyl, ethyl, and dimethyl oxiranes with various alcohols to generate primary alkoxy alcohols in appreciable selectivity. This method described a technique to immobilize cationic zirconium complexes without losing selectivity

Cobalt-Catalyzed Carbonylative Polymerization of Oxetane

Copolymerization of oxetanes with carbon monoxide (CO) provided polymers consisting of both ester and ether units. Four acetylcobalt complexes, AcCo(CO)3P(p-tolyl)3 (1), AcCo(CO)3P(OPh)3 (2), AcCo(CO)3P(NMe2)3 (3), and AcCo(CO)2dppp (4) were synthesized, characterized, and examined as catalysts. Copolymers were obtained with complexes 1 and 2 while no reaction proceeded with complexes 3 and 4. The higher ester/ether ratio and the lower molecular weight of copolymers obtained with 1 compared to those with 2 were attributed to the electron-donating nature of P(p-tolyl)3.</p

Influence of Room-Temperature Ionic Liquids on the Electrosynthesis of CuBDC Type Metal-Organic Frameworks: Crystallite Size and Productivity

The influence of imidazolium- and ammonium-based room-temperature ionic liquids (RTILs) i.e., [bmim][BF₄], [bmim][DCA], and MTBS, respectively, as electrolytes on the crystallite size and productivity of CuBDC (BDC=1,4-benzenedicarboxylate) type metal-organic frameworks (MOFs) by electrosynthesis method via anodic dissolution was investigated. CuBDC was characterized by Fourier transform infrared spectroscopy (FTIR), powder X-ray diffraction (PXRD), scanning electron microscopy (SEM), thermogravimetric analysis (TGA), and nitrogen physisorption. The crystallite size and productivity of CuBDC using [bmim][BF₄], [bmim][DCA], MTBS as electrolytes were 24.7 nm, 22.1 nm, 20.5 nm, and 236 mg/h, 69 mg/h, 291 mg/h, respectively. Bulkier structure of ammonium-based RTILs resulted CuBDC with a smaller crystallite size and higher productivity compared to imidazolium-based RTILs

Vanadium-Catalyzed Oxidation of Terminal Olefin with Molecular Oxygen: Competing Products between Epoxide and Aldehyde

This work may give an understanding of why epoxide and aldehyde are easily generated in olefin oxidation by molecular oxygen when vanadium phenoxyimine complex was employed as a catalyst. This work would also explain why oxetane and dioxetane were harder to produce, although a radical tautomerism may allow the formation of such products.<br /