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All Journal International Journal of Evaluation and Research in Education (IJERE) Reaktor Abdimas Jurnal Inovasi Pendidikan Kimia Jurnal Bahan Alam Terbarukan Jurnal Penelitian Pendidikan Lembaran Ilmu Kependidikan Rekayasa: Jurnal Penerapan Teknologi dan Pembelajaran Sainteknol : Jurnal Sains dan Teknologi Bulletin of Chemical Reaction Engineering & Catalysis Jurnal Kimia Riset J-PEK (JURNAL PEMBELAJARAN KIMIA) Chemistry in Education Indonesian Journal of Chemical Science Indonesian Journal of Physics and Nuclear Applications Indonesian Journal of Chemistry Biosaintifika: Journal of Biology & Biology Education Jurnal Pascapanen dan Bioteknologi Kelautan dan Perikanan Journal of Innovative Science Education International Journal of Active Learning Jurnal Biomedika Journal of English Language and Education Jurnal Ilmiah Ilmu Terapan Universitas Jambi Prosiding Seminar Nasional Pascasarjana Proceeding of International Conference on Science, Education, and Technology Journal of Innovative and Creativity Bulletin of Chemical Reaction Engineering & Catalysis Indonesian Journal of Chemical Science J-CEKI Indonesian Journal of Mathematics and Natural Sciences

Nanik Wijayati

Unknown Affiliation

Author-ID : 417776

Agriculture, Biological Sciences & Forestry Arts Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Education Energy Engineering Environmental Science Health Professions Immunology & microbiology Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Medicine & Pharmacology Physics Public Health Social Sciences Other

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Transformasi Setil Alkohol Menjadi Dimer Setil Alkohol dan Setil Asetat Susan Primadevi; Nanik Wijayati; Ersanghono Kusuma
Biomedika Vol 8 No 1 (2015): Jurnal Biomedika
Publisher : Fakultas Ilmu Kesehatan Universitas Setia Budi Surakarta

Setil alkohol merupakan alkohol rantai panjang (C16) yang berasal dari senyawa turunan minyak sawit. Penelitian ini bertujuan untuk melakukan transformasi setil alkohol menjadi dimer setil alkohol dan setil asetat untuk meningkatkan nilai ekonomis dari setil alkohol. Reaksi dengan asam fosfat ini dilakukan dengan mengaduk campuran dari setil alkohol dalam THF eterate, asam fosfat, dan CTAB selama 90 menit pada suhu 180oC dengan perbandingan mmol setil alkohol dan asam fosfat 1:8. Hasil reaksi kemudian diekstraksi dengan eter. Lapisan organik ditambah Na2 CO3 sampai netral kemudian dicuci dengan akuades. Sisa air dihilangkan dengan penambahan Na2 SO4 anhidrat, sedangkan sisa pelarut dihilangkan dengan gas N2 . Reaksi dengan anhidrida asam asetat dilakukan dengan mengaduk campuran setil alkohol dalam THF eterate, anhidrida asam asetat dan H2 SO4 serta hasilnya dimurnikan melalui penambahan NaHCO3 sampai basa, kemudian dinetralkan dengan air. Hasil reaksi dianalisis menggunakan spektrofotometer FTIR, GC dan GC-MS. Hasil analisis menunjukkan bahwa hasil reaksi setil alkohol menggunakan asam fosfat adalah dimer dari setil alkohol dengan kelimpahan relatif 17,36% dan hasil reaksi setil alkohol dengan anhidrida asam asetat adalah setil asetat dengan kelimpahan relatif 36, 80%.

Catalytic Activity of Zr4+/ZA on The Isomerization Reaction of α-Pinene and It’s Reusability Test Nico Aditya Wijaya; Nanik Wijayati; Edy Cahyono
Indonesian Journal of Physics and Nuclear Applications Vol 1 No 3 (2016)
Publisher : Fakultas Sains dan Matematika Universitas Kristen Satya Wacana

Production of turpentine oil from pine resin until December 2014th was reported to reaching 17.150 tones with the wide of pine forest is 876.992,66 acres. The main component of turpentine oil is α-pinena which isomer products have high value for industrial raw materials. Effects concentration of impregnation and reusability test a best catalyst on α-pinene isomerization reaction using catalysts Zr4+/natural zeolite in which modificated with different Zr4+ concentration were analyzed. Characterization of catalyst included X-ray Fluoroscent for detection of Zr concentration in natural zeolites, Surface Area Analyzer for determine catalyst porosity using BET method, and determination of acidity using vapor ammonia and pyridine base adsorption gravimetric method. Isomerization process used a batch reactor with variation in the concentrations of Zr4+ impregnations 10, 15, and 20 w/w as well as reusability test used best catalyst. The highest conversion of α-pinene used Zr4+/ZA 10% catalyst was 3,89% so as Zr4+/ZA 10% catalyst is best catalyst than other catalysts whereas highest conversion of α-pinene used Zr4+/ZA 10% regeneration catalyst was 4,26%. The product is produced from isomerization reaction of α-pinene used Zr4+/ZA all variations catalysts was camphene and limonene.

PRODUKSI ANTIBIOTIKA OLEH Bacillus subtilis M10 DALAM MEDIA UREA-SORBITOL Supartono Supartono; Nanik Wijayati; Lina Herlina; Enny Ratnaningsih
Reaktor Volume 13, Nomor 3, Juni 2011
Publisher : Dept. of Chemical Engineering, Diponegoro University

PRODUCTION OF ANTIBIOTICS BY Bacillus subtilis M10 IN UREA-SORBITOL MEDIUM. Infection diseases still become the main health problems that suffered by people in Indonesia. Besides, there were many pathogen bacteria found to be resistant to the some antibiotics. Therefore, the efforts to get a new antibiotic require to be done continuously. A new local strain of Bacillus subtilis BAC4 has been known producing an antibiotic that inhibit Serratia marcescens ATCC 27117 growth. To make efficient the local strain, mutation on Bacillus subtilis BAC4 was done by using acridine orange and a mutant cell of Bacillus subtilis M10 that overproduction for producing antibiotic was obtained. Nevertheless, the production kinetics of antibiotic by this mutant has not been reported. The objective of this research was to study the production kinetics of antibiotic by Bacillus subtilis M10 mutant. The production of antibiotic was conducted using batch fermentation and antibiotic assay was performed with agar absorption method using Serratia marcescens ATCC 27117 as bacteria assay. Research result provided that Bacillus subtilis M10 mutant with overproduction of antibiotic produced an antibiotic since 8th hour’s fermentation and optimum of it production was at 14th hours after inoculation. Penyakit infeksi masih menjadi masalah yang utama diderita oleh masyarakat Indonesia. Di samping itu, banyak bakteri patogen yang ditemukan resisten terhadap beberapa antibiotika. Oleh karena itu, upaya-upaya untuk mendapatkan antibiotika baru perlu dilakukan secara terus-menerus. Suatu galur lokal baru Bacillus subtilis BAC4 teridentifikasi memproduksi senyawa antibiotika yang menghambat pertumbuhan Serratia marcescens ATCC27117. Untuk memberdayakan galur tersebut, terhadap Bacillus subtilis BAC4 dilakukan mutasi dengan larutan akridin oranye dan diperoleh mutan Bacillus subtilis M10 yang memproduksi antibiotika berlebihan. Namun, kinetika produksi antibiotika oleh Bacillus subtilis M10 belum pernah dilaporkan. Penelitian ini bertujuan untuk mempelajari kinetika produksi antibiotika oleh mutan Bacillus subtilis M10. Bacillus subtilis M10 difermentasikan ke dalam media urea-sorbitol dan diamati kemampuan produksi antibiotikanya menggunakan Serratia marcescens ATCC 2711 sebagai bakteri uji. Hasil penelitian menunjukkan bahwa mutan Bacillus subtilis M10 memproduksi antibiotika sejak jam ke 8, dan produksi optimumnya terjadi pada jam ke 14 setelah inokulasi.

SINTESIS ESTER-C SEBAGAI SENYAWA ANTIOKSIDAN MENGGUNAKAN BIOKATALIS ENZIM LIPASE/ZEOLIT ALAM Nanik Wijayati; Siti Anisa Rohmah; Supartono Supartono
Jurnal Kimia Riset Vol. 1 No. 1 (2016): Juni
Publisher : Universitas Airlangga

AbstrakImobilisasi enzim lipase merupakan metode yang digunakan untuk meningkatan daya tahan enzim terhadap perubahan lingkungan dan penggunaan secara berulang. Penelitian mengenai imobilisasi enzim lipase dari jamur tiram putih (Pleurotus ostreatus) telah dilakukan dengan metode entrapment (penjebakan, penjeratan) menggunakan zeolit alam teraktivasi dan larutan gel NaF. Waktu pengadukan optimum yang diperoleh dalam imobilisasi enzim lipase ialah selama 3 jam dengan nilai aktivitas lipase sebesar 4,24 U/mL dan enzim loading sebesar 63,07%. Enzim lipase terimobilisasi yang diperoleh diaplikasikan dalam uji stabilitas berulang pada sintesis ester-C. Hasil sintesis dianalisis menggunakan instrument FT-IR dan HPLC. Kata kunci: enzim, lipase, imobilisasi, ester-C AbstractImmobilized lipase enzyme is the method used to improve the durability of enzymes to changes in the environment and use repeatedly. Research on the lipase enzyme immobilization of white oyster mushroom (Pleurotus ostreatus) has been done by the entrapment method using activated natural zeolites and NaF gel solution. The optimum stirring time obtained in immobilized lipase is for 3 hours with a value of lipase activity of 4.24 U/mL and enzyme loading of 63.07%. Immobilized lipase enzyme obtained in the stability tests repeatedly applied to the synthesis of ester-C. Synthesis results were analyzed using FT-IR instrument and HPLC. Keywords: enzymes, lipase, immobilization, ester-C

ANALISIS KEMAMPUAN KOGNITIF DAN BERPIKIR KREATIF SISWA MELALUI PEMBELAJARAN BERBASIS PROYEK BERPENDEKATAN STEM Woro Sumarni; Nanik Wijayati; Sri Supanti
J-PEK (Jurnal Pembelajaran Kimia) Vol 4, No 1 (2019): J-PEK (JURNAL PEMBELAJARAN KIMIA)
Publisher : Universitas Negeri Malang

Penelitian ini bertujuan menganalisis kemampuan kognitif dan berpikir kreatif siswa melalui penerapan pembelajaran berbasis proyek berpendekatan STEM. Penelitian ini merupakan studi kasus dengan desain One-Shot Case Study. Subyek penelitian adalah siswa kelas XI IPA SMA Negeri di Semarang sebanyak 36 siswa. Pengumpulan data menggunakan instrumen tes yang telah divalidasi oleh ahli. Hasil analisis menunjukkan bahwa kemampuan kognitif siswa mencapai kriteria baik, dengan ketercapaian tertinggi pada indikator pemahaman konsep dan kemampuan berpikir kreatif siswa mencapai kriteria baik dengan ketercapaian tertinggi pada indikator kemampuan memandang informasi dari sudut pandang yang berbeda.

Synthesis of SrO.SiO2 Catalyst and Its Application in the Transesterification Reactions of Soybean Oil Nuni Widiarti; Lisa Amalia Suryana; Nanik Wijayati; Endah Fitriani Rahayu; Harjito Harjito; Samuel Budi Wardhana; Didik Prasetyoko; Suprapto Suprapto
Bulletin of Chemical Reaction Engineering & Catalysis 2017: BCREC Volume 12 Issue 2 Year 2017 (August 2017)
Publisher : Department of Chemical Engineering - Diponegoro University

The synthesis and characterization of SrO.SiO2 were carried out. The rice hull ash was utilized as a source for SiO2. The SrO.SiO2 was prepared by sol-gel technique, and the ratios of SrO:SiO2 were varied as 0:1, 1:0, 3:2, 2:4, and 2:7. The sol-gel was calcined at 800 oC for 4 hours. The result was characterized using XRD and FTIR. The diffraction pattern shows that the diffraction angle was shifted, and the intensity of the main peaks was increased. This research indicated that the crystallinity of SrO was improved at the higher SiO content. Further, a new peak was observed in the IR spectra at a wavenumber of 900 cm-1 indicating the appearance of new functional groups of the SrO.SiO2. The catalytic activity of SrO.SiO2 on transesterification reaction was optimized. The optimum condition was obtained at SrO.SiO2 of 2:7, reaction time of 30 minutes, reaction temperature of 65 oC, the amount of catalyst of 1 % w/v of reactants, and the biodiesel yield of 96.66 %.

The Acid Catalyzed Reaction of α-Pinene Over Y-Zeolite Nanik Wijayati; Harno Dwi Pranowo; Jumina Jumina; Triyono Triyono
Indonesian Journal of Chemistry Vol 13, No 1 (2013)
Publisher : Universitas Gadjah Mada

The hydration of α-pinene has been studied in the presence of Y-zeolite (Si/Al = 2.89) as a solid acid catalyst. The reaction was performed in batch reactor in isopropyl alcohol at various temperature and reaction time with magnetic stirrer. The acid catalyst hydration reaction of a-pinene yields a complex mixture of monoterpenes, alcohols and hydrocarbons. The selectivity of α-terpineol (the monocyclic alcohol) as main product was 59.20% with a conversion of 83.83% and the non alcoholic as the isomerization co-product as 30% after 60 min at 65 °C. The conversion and selectivity to α-terpineol increase significantly with in increase in temperature and reaction times.

SYNTHESIS OF TERPINEOL FROM α-PINENE CATALYZED BY TCA/Y-ZEOLITE Nanik Wijayati; Harno Dwi Pranowo; Jumina Jumina; Triyono Triyono
Indonesian Journal of Chemistry Vol 11, No 3 (2011)
Publisher : Universitas Gadjah Mada

The hydration of a-pinene has been studied in the presence of TCA/Y-Zeolite catalyse. The catalyst was prepared by impregnating trichloroacetic acid (TCA) on support of Y-Zeolite. The TCA/Y-Zeolite catalyst converted a-pinene into hydrocarbons, while the TCA/Y-Zeolite catalyst was active and selective for producing alcohols, with a conversion of 66% and showed 55% selectivity for α-terpineol at 10 min. The reaction taken place in a solid-liquid mode and most of the α-terpineol is extracted out by the organic phase during the course of the reaction. TCA/Y-Zeolite was found as good catalyst for hydration of α-pinene to produce α-terpineol.

MUTATION ON Bacillus subtilis BAC4 USING ACRIDINE ORANGE AS AN EFFORT FOR INCREASING ANTIBIOTIC PRODUCTION Supartono Supartono; Nanik Wijayati; Lina Herlina; Enny Ratnaningsih
Indonesian Journal of Chemistry Vol 8, No 2 (2008)
Publisher : Universitas Gadjah Mada

The efforts to get a new antibiotic require to be done continuously, because infection diseases still become the main health problems in Indonesia. A new local strain of Bacillus subtilis BAC4 has been known producing an antibiotic that inhibites Serratia marcescens ATCC 27117 growth. Nevertheless, the optimum conditions have not been studied seriously. The objective of this research was to conduct mutation on B. subtilis BAC4 in order to obtain a mutant cell that overproduct in producing antibiotic. The mutation process was performed by using acridine orange of 1 g.L-1 randomly at various volumes. The production of antibiotic was conducted using batch fermentation and antibiotic assay was performed with agar absorption method using S. marcescens ATCC 27117 as bacteria assay. Research result provided a B. subtilis M10 mutant with overproduction of antibiotic. Characterization of B. subtilis M10 mutant showed that the mutant cell has size of (0.5-1.0) µm x (1.85-2.5) µm; spore has the form of ellipse with thick wavy wall, positive reaction for catalase, and forming acid from glucose and xylose.

PENINGKATAN POTENSI DIRI MAHASISWA MELALUI KULIAH KEWIRAUSAHAAN Susilogati, Sri; Wijayati, Nanik; Rengga, Dyah Pita
Lembaran Ilmu Kependidikan Vol 37, No 1 (2008)
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/lik.v37i1.517

Students do not have much experience of entrepreneurship in the meantime. Itindicates their weakness of practical application toward community problem. Specificpurpose of this activity is to enhance studentâ€™s self-potency through entrepreneurshipsubject in order to be a successful entrepreneur. The teaching methods of this subjectare lecturing, product-making, presentation, direct visit, and written test. Theentrepreneurship subject focuses on problem-solving of small industry. Givingcomprehension and a little experience will help to form their sincerity to start andmanage a business. Statistically, there is a significant difference in entrepreneurialspirit between the initial condition and final condition, either on the basis of selfassessment or peer assessment. Based on the result gained from this activity, it can beconcluded that studentâ€™s self-potency can be enhanced through entrepreneurshipsubject. It is suggested to students of Semarang State University to keep on doingbusiness development to be a successful entrepreneur.Kata Kunci:Pengembangan, potensi, wirausaha

Co-Authors - Jumaeri -, Solikhah A.A. Ketut Agung Cahyawan W Adi Suryanto Afifaturrochmah, Lutfi Agnes Juniarti Chastelyna, Agnes Juniarti Agung Tri Prasetya Agus Yuwono Ali Djamhuri Aluintany, Vitasha Geushiria Amalina, Nur Dina Anggriani, Frida Anggy Rinela Sulistya Rini, Anggy Rinela Sulistya Anita Harum Sari Antonius Tri Widodo Arief Rohman Arina Marissa, Arina Arofah, Barorotul Ulfah Aryono Adhi, Aryono Asbanu, Yoseanno Widi Anugrah Carnawi, Carnawi Christina Astutiningsih Christina Astutiningsih Didik Prasetyoko Drastisianti, Apriliana Dyah Rini Indriyanti Edy Cahyono Eko Budi Susatyo Ella Kusumastuti, Ella Ellianawati, Ellianawati Endang Susilaningsih Enny Ratnaningsih Enny Ratnaningsih Erika Wijayanti Ersanghono K. Ersanghono K., Ersanghono Ersanghono Kusuma Ersanghono Kusumo, Ersanghono F Widhi Mahatmanti Fanny Firman Syah, Fanny Firman Fathur Rokhman Fera Gustri Ariani, Fera Gustri Firstyarikha Habibah, Firstyarikha G, Agnesya Putri Harjito - Harjito Harjito Harjono Harjono Harmanto Harmanto Harno Dwi Pranowo Harno Dwi Pranowo Heri yanto Hertiana, Dita Setya Hertiana, Dita Setya Husna Amalana, Husna Hutasoit, Parpulungan Hutasoit, Parpulungan Iffani, Shinta Zulfa Ika Kusumawati Jayawarsa, A.A. Ketut Jumina Jumina Jumina Jumina Kasmadi Imam Supardi Kasmui -, Kasmui Kharomah, Kharomah Khofifah, Nur Kristianingsih, Desiagi Dwi Kurniasari, Laviona Tiara Kurniawati, Erlinda Eka Kusoro Siadi Kusoro Siadi Laily Isni Farikhati Langgeng Setyo Wibowo Lestari, Etika Ayu Lestari, Hartatik Sri Lestari, Nanda Ayu Lina Herlina Lina Herlina Lisa Amalia Suryana M. Agus Prayitno, M. Agus Machmudah - Margareta Dian Purnamasari, Margareta Dian Marsudi Marsudi Mar’attus Solihah Masturi Masturi Melykhatun, Rizka Ayu Mohammad Agus Prayitno Mohammad Agus Prayitno Mohammad Agus Prayitno Muhammad Afif Muharom, Sidik Muharom, Sidik Murbangun Nuswowati Nasution, Annio Indah Lestari Nico Aditya Wijaya Nindya Ayu Lestari, Nindya Ayu Ningrum, Puji Nugroho, Imam Husnan Nuni Widiarti Nur Faizah Nur Hidayah Nur Kusuma Dewi Nurul Arifin Oktaviana, Sella Pangestika, Ria Rahayu Pratiwi, Khana Fitri Pratono, Ardiyana Prayitno, Mohammad Agus Purwodiningsih, Ristia Putra, Rizki Suhendar Putri, Syarafina Dirinda Rachmadiyono, Dwi Rahayu, Endah Fitriani Ratna Kumala Dewi Resti, Ade Ria Rahayu Pangestika, Ria Rahayu Ria Wulansarie, Ria Riva Ismawati, Riva Riva lsmawati, Riva RobiÃ¢Â€Â™ah Adawiyah, RobiÃ¢Â€Â™ah rohayati rohayati Rohmawati, Baiti Romawati, Carolina Romawati, Carolina Rosiyanah, Siti Ruliyanti, Tria S Mursiti Sabil, Muhammad Asnawi Salva Mutiara, Denisa Samuel Budi Wardana Kusuma, Samuel Budi Wardana Samuel Budi Wardhana Samuel Budi Wardhana Kusuma Saptorini - Saptorini Saptorini, Saptorini Septiyaningsih, Tri Shakin Ervita Oktaviyani Sigit Priatmoko Siti Anisa Rohmah Siti Handayani Siti Sundari Miswadi Solikhah Solikhah Sri Haryani Sri Haryani Sri Ngabekti Sri Sumartiningsih Sri Supanti Sri Susilogati Sri Susilogati Sumarti SRI WARDANI Suci Mulyati Sudarmin Sudarmin Sudarmin Sudarmin Supartono - Suprapto Suprapto Suprapto, Suprapto Surmatiningsih, Sri Susan Primadevi Susanto, Aris Tri Susanto, Aris Tri Sutikno Madnasri Suwito Eko Pramono Sya'idah, Fatin Atikah Nata Talitha Widiatningrum Tinasy, Nur Audiyah Titik Kushandayani Tri Handayani Triawan, Singgih Ade Triawan, Singgih Ade Triyono Triyono Triyono Triyono Tunggul Pawenang, Eram Ulya, Isnaeni Nurul Veronita, Fanna Veronita, Fanna Wahyuningtyas, Wulan Wara Dyah Pita Rengga Watoni, Edi Satria Wawan Wawan Widarti, Nuni Widya Hary Cahyati Wijianto, Wijianto Woro Sumarni Yayuk Tutiek Supriyanti Yeni Anita Sari yoga agung prabowo Yosepphiene Debbie Damayani Yuliyati, Tri Budi Yunita, Wulansari Zaenuri Zaenuri

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