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All Journal VALENSI Teknotan: Jurnal Industri Teknologi Pertanian Jurnal Natur Indonesia Jurnal Sains Materi Indonesia Jurnal Penelitian Hasil Hutan Bulletin of Chemical Reaction Engineering & Catalysis Dharmakarya : Jurnal Aplikasi Ipteks Untuk Masyarakat The Journal of Pure and Applied Chemistry Research Journal of Mathematical and Fundamental Sciences Jurnal Keramik dan Gelas Indonesia Al-Kimia Chimica et Natura Acta ALCHEMY Jurnal Penelitian Kimia Indonesian Mining Journal Indonesian Journal of Chemistry Jurnal Kartika Kimia Jambura Journal of Chemistry Molekul: Jurnal Ilmiah Kimia Jurnal Penyuluhan Perikanan dan Kelautan Al-Khidmat : Jurnal Ilmiah Pengabdian Kepada Masyarakat Jurnal Penelitian Hasil Hutan Jurnal Keramik dan Gelas Indonesia Asean Journal of Science and Engineering (AJSE) Jurnal Ilmiah Berkala: Sains dan Terapan Kimia Makara Journal of Science Jurnal Kimia dan Rekayasa Jurnal Material dan Energi Indonesia Jurnal Teknologi Lingkungan Bulletin of Chemical Reaction Engineering & Catalysis Indonesian Mining Journal al Kimiya : Jurnal Ilmu Kimia dan Terapan ETHOS: Jurnal Penelitian dan Pengabdian kepada Masyarakat
Atiek Rostika Noviyanti
Departemen Kimia, FMIPA, Universitas Padjadjaran
Religion Agriculture, Biological Sciences & Forestry Arts Humanities Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Medicine & Pharmacology Physics Public Health Social Sciences Other

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Thermomechanical Analysis of Various Solid-oxide-fuel-cell Components Using Simple Analog Micrometer Measurements Malik, Yoga Trianzar; Noviyanti, Atiek Rostika; Lestari, Putri Rizka
Makara Journal of Science Vol. 24, No. 1
Publisher : UI Scholars Hub

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The solid oxide fuel cell (SOFC) is a device that can convert the energy stored in gaseous chemicals such as hydrogen into electricity. Because SOFCs are operated at high temperatures, their structures must be stable and durable. The thermomechanical compatibility of SOFC components is the main issue, as negligence in regard to material compatibility leads to cell destruction. In this study, we investigated the thermal expansion coefficient (TEC) of SOFC components, which characterizes their thermomechanical properties. We measured the TEC value of various electrolyte and electrode materials [La9.33Si4O26 (LSO), Ce0.9Gd0.1O1.92 (CGO), La0.8Sr0.2Ga0.8Mg0.2O2.55 (LSGM), LSO-CGO, LSO-LSGM, and La0.7Ca0.3MnO3 (LCM)] using an analog micrometer at temperatures between 298 K and 1073 K. The obtained TEC values matched well with the theoretical references, with errors between 1.80% and 8.00% for LSO, CGO, LSGM, and LCM. The TEC of composite SOFC materials, LSO-LSGM and LSO-CGO, were 10.29 × 10−6 K−1 and 10.10 × 10−6 K−1, respectively. Given the slight difference in their TEC values, these electrolytes would thermomechanically match an LCM cathode.
KARAKTERISTIK PRODUK DARI ESTERIFIKASI DENGAN BANTUAN GELOMBANG ULTRASONIK TERHADAP MINYAK BIJI KAPUK TEROZONASI Haryono Haryono; Engela Evy Ernawati; Atiek Rostika Noviyanti
Jurnal Penelitian Hasil Hutan Vol 40, No 3 (2022): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.2022.40.3.144-154

Abstract

Minyak biji kapuk merupakan minyak non-pangan, sehingga sangat menguntungkan sebagai bahan baku pembuatan biodiesel. Namun minyak biji kapuk didominasi oleh asam lemak rantai panjang dan tak jenuh. Jenis asam lemak tersebut cenderung akan mengurangi kualitas biodiesel yang dihasilkan, yaitu rendahnya bilangan setana dan dapat memicu reaksi polimerisasi selama pembakaran. Ozonasi dapat diterapkan untuk memperpendek rantai karbon dan jumlah ikatan rangkap pada asam lemak dari minyak biji kapuk. Penelitian ini bertujuan untuk mempelajari pengaruh waktu ozonasi pada tahap penyiapan minyak biji kapuk terhadap karakteristik produk dari tahap esterifikasi dengan bantuan ultrasonikasi. Waktu ozonasi divariasikan selama 60, 90, dan 120 menit. Esterifikasi dilakukan selama 30 menit pada suhu 60°C dengan bantuan gelombang ultrasonik pada frekuensi 35 kHz. Hasil penelitian menunjukkan bahwa semakin lama waktu ozonasi dihasilkan minyak biji kapuk dengan bilangan asam semakin meningkat. Peningkatan bilangan asam dari minyak biji kapuk tersebut dan diverifikasi dengan komposisi asam lemak dari hasil analisis dengan Khromatografi Gas-Spektroskopi Massa, menunjukkan bahwa struktur asam lemak pada minyak biji kapuk menjadi lebih sederhana. Esterifikasi selama 30 menit terhadap minyak biji kapuk yang telah diozonasi menghasilkan fase minyak dengan bilangan asam 10,6 mg KOH/g, bilangan penyabunan 112 mg KOH/g, dan densitas 903 kg/m3.
Effect of Sensitive pH on Hydroxyapatite Properties Synthesized from Chicken Eggshell Ferli Septi Irwansyah; Azhari Yusuf; Diana Rakhmawaty Eddy; Risdiana Risdiana; Atiek Rostika Noviyanti
Indonesian Journal of Chemistry Vol 22, No 5 (2022)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.72959

Abstract

The hydrothermal method has effectively synthesized hydroxyapatite (HA). This study aimed to analyze the effect of pH on the properties (purity, crystallinity, and size) of HA crystals. HA synthesis of chicken eggshells was carried out using the hydrothermal method at temperatures of 230 °C with pH 9 and 9.34. The characteristics of HA are determined by XRF, XRD, FTIR, and TEM. The composition of the most significant compound obtained from the results of XRF analysis is CaO (97.5%). The XRD analysis showed that the purity of HA with pH 9.00 and 9.34 obtained was 97.8 and 96.6%, with the crystallinity of 56.46 and 56.96%. It was also obtained that the size of crystal HA was 21.8 and 15.7 nm for samples synthesized at pH 9.00 and 9.34. The results showed that the purity and size of HA were affected by differences in the pH synthesis and were relatively the same for its crystallinity which directly affects the value lattice parameter. The properties of HA produced by the hydrothermal method have met the criteria for biomedical applications.
KARAKTERISTIK PRODUK DARI ESTERIFIKASI DENGAN BANTUAN GELOMBANG ULTRASONIK TERHADAP MINYAK BIJI KAPUK TEROZONASI Haryono Haryono; Engela Evy Ernawati; Atiek Rostika Noviyanti
Jurnal Penelitian Hasil Hutan Vol 40, No 3 (2022): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.2022.40.3.144-154

Abstract

Minyak biji kapuk merupakan minyak non-pangan, sehingga sangat menguntungkan sebagai bahan baku pembuatan biodiesel. Namun minyak biji kapuk didominasi oleh asam lemak rantai panjang dan tak jenuh. Jenis asam lemak tersebut cenderung akan mengurangi kualitas biodiesel yang dihasilkan, yaitu rendahnya bilangan setana dan dapat memicu reaksi polimerisasi selama pembakaran. Ozonasi dapat diterapkan untuk memperpendek rantai karbon dan jumlah ikatan rangkap pada asam lemak dari minyak biji kapuk. Penelitian ini bertujuan untuk mempelajari pengaruh waktu ozonasi pada tahap penyiapan minyak biji kapuk terhadap karakteristik produk dari tahap esterifikasi dengan bantuan ultrasonikasi. Waktu ozonasi divariasikan selama 60, 90, dan 120 menit. Esterifikasi dilakukan selama 30 menit pada suhu 60°C dengan bantuan gelombang ultrasonik pada frekuensi 35 kHz. Hasil penelitian menunjukkan bahwa semakin lama waktu ozonasi dihasilkan minyak biji kapuk dengan bilangan asam semakin meningkat. Peningkatan bilangan asam dari minyak biji kapuk tersebut dan diverifikasi dengan komposisi asam lemak dari hasil analisis dengan Khromatografi Gas-Spektroskopi Massa, menunjukkan bahwa struktur asam lemak pada minyak biji kapuk menjadi lebih sederhana. Esterifikasi selama 30 menit terhadap minyak biji kapuk yang telah diozonasi menghasilkan fase minyak dengan bilangan asam 10,6 mg KOH/g, bilangan penyabunan 112 mg KOH/g, dan densitas 903 kg/m3.
ELEKTROLIT APATIT LANTANUN SILIKAT BERBAHAN DASAR SILIKA SEKAM PADI ATIEK ROSTIKA NOVIYANTI; YATI B YULIYATI; DIANA RAKHMAWATY; S SOLIHUDIN; ROEKMIATI TJOKRONEGORO
Jurnal Material dan Energi Indonesia Vol 6, No 02 (2016)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (374.3 KB) | DOI: 10.24198/jmei.v6i02.10952

Abstract

Silika komersil merupakan salah satu bahan yang digunakan untuk preparasi elektrolit padatan apatit lantanum silikat selama ini. Sekam padi mengandung silika (SiO2) dengan jumlah yang tinggi yaitu 87-98%.  Penelitian ini bertujuan menyintesis apatit lantanum silikat dengan sumber silikon dari silika sekam padi. Untuk mengetahui pengaruh penggunaan silikon dari sumber yang berbeda struktur dan morfologi kedua lantanum silikat apatit dikarakterisasi dengan XRD dan SEM.  Morfologi apatit lantanum silikat menggunakan silikat komersial nampak lebih kompak dengan densitas lebih tinggi. Struktur dihaluskan dengan menggunakan metode Le bail dari rietica kedua elektrolit apatit memiliki struktur dengan grup ruang P 63/m.
Sintesis, Karakterisasi, dan Uji Adsorpsi Komposit Silika/Karbon dari Limbah Sekam Padi sebagai Adsorben Tembaga (II): Synthesis, Characterization, and Adsorption Test of Silica/Carbon Composites from Rice Husk Waste as Copper (II) Adsorbent Haryono; Atiek Rostika Noviyanti; Engela Evy Ernawati
Jurnal Teknologi Lingkungan Vol. 24 No. 1 (2023)
Publisher : BRIN Publishing (Penerbit BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/jtl.2023.241

Abstract

Copper ion as one of the pollutants in industrial wastewater can be treated by the adsorption method. One type of adsorbent can be prepared from rice husk. Rice husk as agricultural waste contains carbon and silica which can act as metal adsorbents. The purpose of this study was to synthesize and characterize silica/carbon composites, as well as test their adsorption as adsorbent on copper (II) ion adsorption by determining the optimum composition of silica/carbon, adsorption capacity, and model of isotherm adsorption. The research method consisted of gasification of rice husks, extraction of silica from rice husk charcoal with potassium carbonate as solvent, manufacture of silica/carbon composites, and adsorption tests. The results showed that the mass ratio of silica to carbon of 2:1 was the optimum composition in the synthesis of silica/carbon composites as adsorbent for the adsorption of copper (II) ion. The silica/carbon composite adsorbent in this composition had the highest adsorption capacity for copper (II) ion and surface area is 75.88 mg/g and 233.45 m2/g, respectively. The optimum adsorption time was obtained for 40 minutes and the model of adsorption isotherm in the form of Freundlich adsorption with R2 = 0.9582.   Abstrak Ion tembaga sebagai salah satu polutan dalam air limbah industri dapat ditangani dengan metode adsorpsi. Salah satu jenis adsorben dapat disiapkan dari sekam padi. Sekam padi sebagai limbah pertanian mengandung karbon dan silika yang dapat berperan sebagai adsorben logam. Tujuan dari penelitian ini adalah melakukan sintesis dan karakterisasi komposit silika/karbon, serta uji adsorpsinya sebagai adsorben pada adsorpsi ion tembaga (II) melalui penentuan komposisi optimum dari silika/karbon, kapasitas adsorpsi, dan model adsorpsi isoterm. Metode penelitian terdiri dari gasifikasi sekam padi, ekstraksi silika dari arang sekam padi dengan pelarut kalium karbonat, pembuatan komposit silika/karbon, dan uji adsorpsi. Hasil penelitian menunjukkan bahwa rasio massa silika terhadap karbon sebesar 2:1 merupakan komposisi optimum pada sintesis komposit silika/karbon sebagai adsorben untuk adsorpsi ion tembaga (II). Adsorben komposit silika/karbon pada komposisi tersebut memiliki kapasitas adsorpsi terhadap ion tembaga (II) dan luas permukaan paling tinggi yaitu berturut-turut sebesar 75,88 mg/g dan 233,45 m2/g. Waktu optimum adsorpsi diperoleh selama 40 menit dan dengan model adsorpsi isoterm berupa adsorpsi Freundlich dengan nilai R2 = 0,9582.
Degradation of Ciprofloxacin by Titanium Dioxide (TiO2) Nanoparticles: Optimization of Conditions, Toxicity, and Degradation Pathway Mohammad Rofik Usman; Azmi Prasasti; Sovia Islamiah; Alfian Nur Firdaus; Ayu Wanda Marita; Syamsiyatul Fajriyah; Atiek Rostika Noviyanti; Diana Rakhmawaty Eddy
Bulletin of Chemical Reaction Engineering & Catalysis 2021: BCREC Volume 16 Issue 4 Year 2021 (December 2021)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.16.4.11355.752-762

Abstract

The popular use of ciprofloxacin is often irrational, so it causes environmental pollution such as resistance. The solution to overcome environmental pollution due to ciprofloxacin is degradation by using TiO2 nanoparticles. TiO2 nanoparticles performance is influenced by environment such as light source, pH solvent, duration of lighting and TiO2 nanoparticles mass. The residual levels determination of ciprofloxacin was carried out by using a UV-Vis spectrophotometer. Toxicity test of ciprofloxacin degradation products with TiO2 nanoparticles used Escherichia coli bacteria. Liquid Chromatography Mass Spectrometry (LCMS) was used to determine the type of ciprofloxacin degradation product with TiO2 nanoparticles. The optimum condition for the ciprofloxacin degradation with TiO2 nanoparticles is lighting for 5 hours by using a white mercury UV lamp and 50 mg TiO2 nanoparticles with pH solvent of 5.5. The toxicity of ciprofloxacin degradation product with TiO2 nanoparticles was low. The smallest degradation product identified with m/z was p-fluoraniline (m/z 111). Copyright © 2021 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0). 
SYNTHESIS AND CHARACTERIZATION OF GAMMA ALUMINA AND ITS ADSORPTION CAPABILITY TEST FOR POMALAA MAGNESIUM LATERITE, SOUTHEAST SULAWESI Titin Siti Fatimah; Atiek Rostika Noviyanti; Juliandri Juliandri; Solihudin Solihudin
Indonesian Mining Journal Vol 22 No 1 (2019): INDONESIAN MINING JOURNAL, Vol. 22 No. 1, April 2019
Publisher : Balai Besar Pengujian Mineral dan Batubara tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30556/imj.Vol22.No1.2019.977

Abstract

Based on variations in calcination temperature, gamma alumina has successfully been made using a simple sol-gel method for Pomalaa magnesium-laterite adsorption from the South East of Sulawesi. The laterite leached by sulfuric acid was then precipitated by ammonia, to make the magnesium was separated from its main impurities (Si, Fe and Al). Temperature variations at 500, 650, 800 and 950 °C in gamma alumina making formed the gamma alumina phase while the alpha alumina phase was formed at 1100 °C. The higher calcination temperature the lower the specific surface area respectively from 196.385, 156.239, 105.725, 96.134 and 15.396 (m2/g). This results in decreasing the magnesium of the laterite 9.04, 8.70, 8.09, 6.39 and 0.29 (mg/L) respectively. The 800 °C-calcination gamma alumina has the highest volume of the pore, namely 0.3265 mL/g and the radius of 61.76 Å. The gamma alumina isotherm curve is type IV. The SEM-EDS test shows an aggregation spherical shape. Gamma alumina was detected to adsorb Mg laterite. The X-ray mapping of SEM-EDS test shows even distribution between gamma alumina, magnesium and nickel. The highest adsorption is retained by GA-800/3 sample, namely 81.31 %.
How to Read and Determine the Specific Surface Area of Inorganic Materials using the Brunauer-Emmett-Teller (BET) Method Irwansyah, Ferli Septi; Amal, Alfi Ikhlasul; Diyanthi, Erlinda Widyasmara; Hadisantoso, Eko Prabowo; Noviyanti, Atiek Rostika; Eddy, Diana Rakhmawaty; Risdiana, Risdiana
ASEAN Journal of Science and Engineering Vol 4, No 1 (2024): AJSE: March 2024
Publisher : Universitas Pendidikan Indonesia (UPI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17509/ajse.v4i1.60748

Abstract

The specific surface area of inorganic materials is a crucial parameter that influences their performance in various applications. The Brunauer-Emmett-Teller (BET) method is widely used for accurately determining the surface area of porous materials. This study presents a comprehensive guide to determining the specific surface area of inorganic materials using the BET method. The paper outlines the theoretical background of the BET method, the experimental procedures involved, and the data analysis techniques. Additionally, we discuss the limitations and potential sources of errors in the BET method. The proposed guide aims to provide researchers and practitioners with a systematic approach to accurately measure the specific surface area of inorganic materials, enabling informed decision-making and enhancing material design and optimization processes.
Hydroxyapatite as Delivery and Carrier Material: Systematic Literature Review with Bibliometric Analysis Noviyanti, Atiek Rostika; Adzkia, Qurratu Aini Alya; Novella, Indrika; Kurnia, Irwan; Suryana, S.; Ma'Amor, Azman Bin; Irwansyah, Ferli Septi
ASEAN Journal of Science and Engineering Vol 4, No 2 (2024): AJSE: September 2024
Publisher : Universitas Pendidikan Indonesia (UPI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17509/ajse.v4i2.70223

Abstract

Hydroxyapatite (HA), a bioactive calcium phosphate compound, has garnered significant attention in biomedical and pharmaceutical research due to its remarkable properties as a delivery and carrier material. This review aims to comprehensively analyze the extensive research surrounding HA's applications in drug delivery and as a carrier for various therapeutic agents, encompassing various studies from scientific articles focusing on HA-based systems designed for drug delivery, tissue engineering, and other therapeutic applications. The review also investigates the HA synthesis and modification methods for tailored drug release profiles, as well as the interaction between HA and bioactive molecules. Key findings from the review include the versatility of HA as a biocompatible carrier, its ability to facilitate controlled drug release, and its potential to enhance tissue regeneration. The review identifies trends in HA-based delivery systems, highlighting recent advances and emerging research directions, as well as providing valuable insights into the current state of HA-based drug delivery and carrier materials, shedding light on the potential of HA to revolutionize the field of biomedicine. It serves as a valuable resource for researchers, clinicians, and pharmaceutical professionals seeking to harness the capabilities of HA in developing innovative therapeutic strategies.
Co-Authors Adhitya Pratama Adzkia, Qurratu Aini Alya Akrajas Ali Umar Alfian Nur Firdaus Alfian Raymondo Sinurat Amal, Alfi Ikhlasul Anceu Murniati Anni Anggraeni Anni Anggraeni, Anni Arie Hardian Arini Nurisydayanti Gumilar Asman Asman Ayu Wanda Marita Azhari Yusuf Azhari Yusuf Azmi Prasasti Bambang Prijamboedi Basril Simbarta Tarigan Budi Adiperdana Budiman, Yudha Prawira Cecep Kusmana Dani Gustaman Syarif Dayu Kusuma, Hersandy Diana Rakhmawaty Diana Rakhmawaty Diana Rakhmawaty Eddy Diana Rakhmawaty Eddy Diana Rakhmawaty Eddy Diana Rakhmawaty Eddy Diana Rakhmawaty Eddy Diana Rakhmawaty Eddy Diana Rakhmawaty Eddy Diana Rakhmawaty Eddy Diana Rakhmawaty Eddy Dickry Abil Barry Pratama Diding Mandala Putra Dini Janati Diyanthi, Erlinda Widyasmara E Evy Ernawati Eddy, Diana Rakhmawaty Eko Prabowo Hadisantoso, Eko Prabowo Engela Evy Ernawati Engela Evy Ernawati Fajar Firmansyah Ferli Septi Irwansyah Firmansyah, Fajar Gani Abdilah Ghaissani Nur Maulani Gustaman Syarif, Dani Halim, Riyan Hanapratiwi, Reinanda HARYONO Haryono Haryono Haryono Haryono Haryono Haryono Haryono Haryono Haryono Haryono Haryono MT Hemzah, Sabila Aulia Hersandy Dayu Kusuma I Nyoman Marsih Iman Rahayu Irwan Kurnia Irwan Kurnia Ismunandar Ismu Iwan Hastiawan Iwan Hastiawan Iwan Hastiawan Jasmansyah, Jasmansyah Juliandri Juliandri Karya, Teguh Kurnia, Irwan Laelaturrohmah Laelaturrohmah Lestari, Putri Rizka Lubis, Rubianto A. Ma'Amor, Azman Bin Malik, Yoga Trianzar Maryani, Eneng Mastuti Widi Lestari Mastuti Widi Lestari, Mastuti Widi Ma’amor, Azman Mochammad Rizal Mohammad Rofik Usman Muhamad Rozaq Nur Fauzi Muhammad Raihan Gemilang Muhammad Reza Muhammad Rizky Ridwansyah Nafisah, Aulia Zakiyatun Nisrina, Aniqa Novella, Indrika Nur Azizah Ferdiana Nurhayati, Mita Pandu, Rinal Pramudya Sulaeman, Allyn Rahmadona, Nova Reinanda Hanapratiwi Rihan Amila Putri Rinal Pandu Risdiana Risdiana RISDIANA RISDIANA, RISDIANA Rizka Endah Roekmiati Tjokronegoro Roekmiati Tjokronegoro, Roekmiati Rubianto A. Lubis Rukiah Rukiah Rukiah Rukiah Rukiah Rukiah Rukiah Rukiah Rukiah Rukiah Rustaman Rustaman S SOLIHUDIN S Solihudin, S S. Suryana Sahrul Hidayat Sarifah Nurjanah Seli Listiani Solihudin Solihudin Solihudin Solihudin Solihudin Solihudin Solihudin Solihudin Solihudin Solihudin Solihudin Solihudin Solihudin Solihudin Solihudin, Solihudin Solihudin, Solihudin Sovia Islamiah Syamsiyatul Fajriyah TATI NURHAYATI Titin Siti Fatimah Titin Siti Fatimah Wahyu Safriansyah Walim Lili Yashfi, Difa Muhammad Yati B Yuliyati YATI B YULIYATI Yati B Yuliyati Yati B Yuliyati Yati B Yuliyati, Yati B Yati B. Yuliyati Yeni Wahyuni Hartati Yuli Andriani Yusi Deawati