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PEMBUATAN KATALIS ASAM (NI/γ-AL2O3) DAN KATALIS BASA (MG/γ-AL2O3) UNTUK APLIKASI PEMBUATAN BIODIESEL DARI BAHAN BAKU MINYAK JELANTAH Savitri, Savitri; Nugraha, Agung Setia; Aziz, Isalmi
Jurnal Kimia Valensi Jurnal Kimia VALENSI Volume 2, No. 1, Mei 2016
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat Syarif Hidayatullah State Islamic Uni

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (713.582 KB) | DOI: 10.15408/jkv.v2i1.3104

Abstract

Biodiesel is an alternative energy fuel a substitute for diesel oil produced from vegetable oil or animal fat which have the advantage easily used, they are biodegradable, not toxic and sulfur free. This research aims to do process of prosucing biodiesel using acid catalysts (Ni/?-Al2O3) for a esterification process and base catalyst (Mg/?-Al2O3) for transesterification  process with the variation of catalyst concentration Ni/?-Al2O3 (0.5%; 0.75%; 1% and 2%) and the time (60 minutes, 120 minutes, and 180 minutes). Research of methodology starting to the process impregnation Ni and Mg metal into a buffer ?-Al2O3, characterization a catalyst with XRD, FTIR, and the SAA, and the esterification process to lower levels of FFA and transesterification process for making it biodiesel. The characterization with X-RD does not appear a new peak, only just occurred a shift peak, and declines intensity of Ni/?-Al2O3 and Mg/?-Al2O3. The analysis result of the SAA, a decline in the surface area (the decline in active side of catalyst) suspected the process impregnation not run perfect because Ni and Mg metal only distributed on the surface of buffer pore. The results of the FTIR analysis does not occur the addition of acidity and alkalinity. The steady of catalyst concentration from esterification process is 1% within 120 minutes produce levels of FFA 6.85%.  Keywords: Biodiesel, esterification, impregnation, used cooking oil, transesterificationDOI : http://dx.doi.org/10.15408/jkv.v2i1.3104
PENGARUH PEMBELAJARAN PRAKTIK DAN MOTIVASI BERWIRAUSAHA TERHADAP SIKAP KEWIRAUSAHAAN SISWA SMK NEGERI BIDANG TEKNOLOGI DAN REKAYASA DI KOTA SEMARANG Savitri, Savitri
Educational Management Vol 1 No 2 (2012)
Publisher : Educational Management

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Abstract

TINJAUAN BENTUK SIRKULASI UDARA RUMAH ADAT KAMPUNG CIKONDANG, DESA LAMAJANG, KABUPATEN BANDUNG Sriwardani, Nani; Savitri, Savitri
Narada: Jurnal Desain Dan Seni Vol 5, No 1 (2018)
Publisher : Universitas Mercu Buana

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Abstract

Ringkasan Rumah adat Cikondang di kampung Cikondang desa Lamajang Kec.Pangalengan Kabupaten Bandung. dibangun sekitar abad ke-16, dan mengalami kebakaran di tahun 1942. Rumah adat ini hanya satu-satunya yang tersisa dicikondang, sehingga dilindungi dan telah menjadi situs cagar budaya arsitektur khas sunda. Pada berbagai paparan data menjelaskan rumah adat cikondang dan kehidupan masyakatnya,  namun paparan secara terukur dan detail bentuk fisik arsitektur belum ditemukan. Menurut data dan narasumber bahwa rumah adat yang hanya tersisa satu inipun tidak akan dibangun kembali.  Bahasan bertujuan menggambarkan bentuk sirkulasi udara dari bumi adat Cikondang berupa sketsa gambaran detail seperti jendela, jalosi dan kisi-kisi. Metode yang digunakan dalam penelitian ini adalah metode kualitatif dengan analisis deskriptif yang didukung dengan observasi studi di lapangan dan studi literatur. Pada bangunan rumah adat Cikondang ini adalah menggunakan cross ventilation . Tiap sisi bangunan menjadi udara masuk dan keluar. Jendela kayu bisa mengatur besar-kecilnya volume udara dengan buka-tutup jendela. Material bangunan yang berbahan alami yang diambil dari hutan keramat. Bangunan yang berbentuk panggung mampu menjaga suhu di dalam ruangan. Abstract Cikondang traditional house in Cikondang village, Lamajang village, Pangalengan district, Bandung regency. was built around the 16th century, and experienced a fire in 1942. This traditional house is the only one left dicikondang, so it is protected and has become a cultural heritage site typical of Sundanese architecture. In various explanations, the data describes the cikondang traditional house and the life of the community, but the measured exposure and details of the physical form of architecture have not been found. According to the data and informants that the traditional house that is left only this one will not be rebuilt. The discussion aims to describe the form of air circulation from the Cikondang customary earth in the form of a detailed sketch of a picture such as a window, jalosi and grid. The method used in this study is a qualitative method with descriptive analysis that is supported by observations of field studies and literature studies. The shape of circulation in cikondang traditional house is using cross ventilation. Each side of the building becomes air in and out. Wooden windows can adjust the volume of air with open-close windows. Building materials made from natural materials taken from sacred forests. The building in the form of a stage is able to maintain the temperature in the room. 
Konversi Gondorukem menjadi Fine Chemicals melalui Reaksi Hydrocracking Menggunakan Katalis Ni-Mo/γ-Al2O3 Jayanti, Yeni Fitriana; Savitri, Savitri; Rinaldi, Nino; Priatmoko, Sigit; Jumaeri, Jumaeri
Indonesian Journal of Chemical Science Vol 6 No 3 (2017)
Publisher : Indonesian Journal of Chemical Science

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Abstract

A preliminary study of the conversion of rosin oil to fine chemicals through hydrocracking reactions using Ni-Mo/γ-Al2O3 catalysts has been studied. The purpose of this study was to determine the effect of temperature, initial pressure of hydrogen gas, and reaction time to the reaction of hydrocracking of rosin oil to produce fine chemicals. Hydrocracking of rosin oil is performed on a batch autoclave reactor by varying the reaction temperature (300-350 °C), hydrogen gas pressure (10-40 bar), and reaction time (60-240 min). The amount of Ni-Mo/γ-Al2O3 catalyst used is 1% w/w of rosin oil. The results showed that the compounds contained in rosin oil experienced hydrocracking reaction with the use of high reaction temperature. The use of low hydrogen gas pressure is able to split of rosin oil into fine chemicals, whereas the long reaction time results in the rosin oil being crushed producing more products. The hydrocracking reaction of rosin oil using Ni-Mo/γ-Al2O3 catalyst produces the optimum product if high temperatures used with low hydrogen gas usage and reaction time are used relatively long.
TINJAUAN BENTUK SIRKULASI UDARA RUMAH ADAT KAMPUNG CIKONDANG, DESA LAMAJANG, KABUPATEN BANDUNG Sriwardani, Nani; Savitri, Savitri
Narada: Jurnal Desain Dan Seni Vol 5, No 1 (2018)
Publisher : Universitas Mercu Buana

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Abstract

Ringkasan Rumah adat Cikondang di kampung Cikondang desa Lamajang Kec.Pangalengan Kabupaten Bandung. dibangun sekitar abad ke-16, dan mengalami kebakaran di tahun 1942. Rumah adat ini hanya satu-satunya yang tersisa dicikondang, sehingga dilindungi dan telah menjadi situs cagar budaya arsitektur khas sunda. Pada berbagai paparan data menjelaskan rumah adat cikondang dan kehidupan masyakatnya,  namun paparan secara terukur dan detail bentuk fisik arsitektur belum ditemukan. Menurut data dan narasumber bahwa rumah adat yang hanya tersisa satu inipun tidak akan dibangun kembali.  Bahasan bertujuan menggambarkan bentuk sirkulasi udara dari bumi adat Cikondang berupa sketsa gambaran detail seperti jendela, jalosi dan kisi-kisi. Metode yang digunakan dalam penelitian ini adalah metode kualitatif dengan analisis deskriptif yang didukung dengan observasi studi di lapangan dan studi literatur. Pada bangunan rumah adat Cikondang ini adalah menggunakan cross ventilation . Tiap sisi bangunan menjadi udara masuk dan keluar. Jendela kayu bisa mengatur besar-kecilnya volume udara dengan buka-tutup jendela. Material bangunan yang berbahan alami yang diambil dari hutan keramat. Bangunan yang berbentuk panggung mampu menjaga suhu di dalam ruangan. Abstract Cikondang traditional house in Cikondang village, Lamajang village, Pangalengan district, Bandung regency. was built around the 16th century, and experienced a fire in 1942. This traditional house is the only one left dicikondang, so it is protected and has become a cultural heritage site typical of Sundanese architecture. In various explanations, the data describes the cikondang traditional house and the life of the community, but the measured exposure and details of the physical form of architecture have not been found. According to the data and informants that the traditional house that is left only this one will not be rebuilt. The discussion aims to describe the form of air circulation from the Cikondang customary earth in the form of a detailed sketch of a picture such as a window, jalosi and grid. The method used in this study is a qualitative method with descriptive analysis that is supported by observations of field studies and literature studies. The shape of circulation in cikondang traditional house is using cross ventilation. Each side of the building becomes air in and out. Wooden windows can adjust the volume of air with open-close windows. Building materials made from natural materials taken from sacred forests. The building in the form of a stage is able to maintain the temperature in the room. 
PENGARUH SENYAWA SILAN TERHADAP SIFAT MEKANIK MATERIAL PELAPIS PADUAN HIBRID EPOKSI TERMODIFIKASI POLIURETAN Savitri, Savitri; Triwulandari, Evi; Haryono, Agus; Syahputra, O A
Jurnal Kimia Terapan Indonesia (Indonesian Journal of Applied Chemistry) Vol 17, No 1 (2015)
Publisher : Research Center for Chemistry - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (847.129 KB) | DOI: 10.14203/jkti.v17i1.19

Abstract

Preparation of hybrid coating material from modified epoxy polyurethane (ETP) and silan (Si) has been done. Epoxy and polyurethane were modified with silan using γ-Glisidoksil propil trimetoksisilan (GPTMS) and γ-aminopropyl triethoxysilane (γ-APS) and also dibutyltindilaurate (DBTL) as catalyst. Fourier Transform Infrared (FTIR) characterization indicated that the hybrid coating material has been formed. The results of the analysis of NCO percent and conversion rate of isocyanates (α) also verified that the ETP-Si hybrid coatings have been formed. The addition 30% of silane as Si-O group indicated the rest of NCO percent was the lowest for hybrid coating material with polyurethane concentration of 5% and 10. The composition of ETP5% - Si 30% was the optimum composition from the ETP-Si hybrid coating material based on the mechanical analysis.Key words: hybrid coating, polyurethane, epoxy, silane, ETP – Si
Hubungan frekuensi asupan minuman manis dengan akumulasi plak pada anakThe relationship between the frequency of sugar-sweetened beverage intake and plaque accumulation in children Savitri, Savitri; Primarti, Risti Saptarini; Gartika, Meirina
Jurnal Kedokteran Gigi Universitas Padjadjaran Vol 29, No 2 (2017): Agustus
Publisher : Fakultas Kedokteran Gigi Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (283.269 KB) | DOI: 10.24198/jkg.v29i2.18553

Abstract

Pendahuluan: Derajat kesehatan gigi dan mulut dapat diukur berdasarkan akumulasi plak pada permukaan gigi. Faktor yang menyebabkan terbentuknya akumulasi plak adalah karbohidrat di makanan, salah satunya dalam bentuk minuman manis. Kandungan pemanis di dalam minuman terbagi menjadi dua jenis yaitu, pemanis alami dan buatan. Tujuan penelitian adalah mengetahui hubungan antara frekuensi asupan minuman manis dengan akumulasi plak pada anak. Metode: Jenis penelitian deskriptif dengan studi korelatif, subjek penelitian adalah anak berusia 8-10 tahun yang bersekolah di delapan sekolah dasar negeri Kecamatan Coblong, Bandung. Teknik pengambilan sampel menggunakan multistage random sampling. Pengambilan data menggunakan food record quistionnaire untuk diisi pada satu hari libur dan masuk sekolah, kemudian anak dilakukan pemeriksaan dengan indeks plak O’Leary. Data yang terkumpul, ditabulasi dan diuji dengan korelasi Pearson. Hasil: Penelitian menunjukkan bahwa frekuensi rata-rata asupan minuman manis adalah dua dan akumulasi plak rata-rata adalah 81.17%. Hasil analisis hubungan frekuensi asupan minuman manis dengan akumulasi plak didapatkan korelasi koefisien (r) sebesar 0.364 dengan p=0.011 (p<0.05). Simpulan: Terdapat hubungan yang signifikan antara frekuensi asupan minuman manis dengan akumulasi plak.Kata kunci: Frekuensi, pemanis alami, pemanis buatan, akumulasi plak. ABSTRACTIntroduction: The degree of dental and oral health can be measured based on the accumulation of plaque on the surface of the tooth. Factors that cause the formation of plaque accumulation are carbohydrates in food, one of which is in the form of sugar-sweetend beverages. The sweetener content in drinks is divided into two types, natural and artificial sweeteners. The aim of the study was to determine the relationship between the frequency of intake of sugar-sweetend beverages and plaque accumulation in children. Methods: This type of research is descriptive with correlative studies, research subjects are children aged 8-10 years who attended eight public elementary schools in Coblong District, Bandung. The sampling technique uses multistage random sampling. Data collection uses a food record questionnaire to fill in one day off and go to school, then the child is examined by the O’Leary plaque index. Data collected, tabulated and tested with Pearson correlation. Results: Research shows that the average frequency of intake of sugar-sweetend beverages is two and the average plaque accumulation is 81.17%. The results of the analysis of the relationship between the frequency of intake of sugar-sweetend beverages and plaque accumulation obtained correlation coefficient (r) of 0.364 with p = 0.011 (p <0.05). Conclusion: There is a significant relationship between the frequency of intake of sugar-sweetend beverages and plaque accumulation.Keywords: Frequency, intake, natural sweetener, artificial sweetener, plaque accumulation.
Perbaikan Stek dan Cara Tanam dalam Upaya Peningkatan Produksi Ubi Kayu (Manihot utilissima) Savitri, Savitri
Serambi Saintia : Jurnal Sains dan Aplikasi Vol 6, No 2 (2018): Serambi Saintia
Publisher : Universitas Serambi Mekkah

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (41.762 KB) | DOI: 10.32672/jss.v6i2.787

Abstract

Perbaikan Stek dan Cata Tanam dalam Upaya Peningkatan Produksi Ubi Kayu (Manihot utilisima). Penelitian dilaksanakan di lahan percobaan Fakultas Pertanian Universitas Abulyatama mulai bulan Mei 2018 sampai dengan Agustus 2018. Metode penelitian yang digunakan adalah Rancangan Acak Kelompok (RAK) Faktorial dengan dua faktor : faktor pertama adalah perbaikan stek (P), yang terdiri atas 3 taraf perlakuan yaitu P¬0 kontrol, P1= tanpa gabus, P2 = pelukaan dengan jarak 10 cm. Dan faktor kedua adalah cara tanam (M) dengan 2 taraf perlakuan yaitu M0 = tegak dan M1 = miring (450). Variabel respons yang diamati adalah tinggi tanaman (cm), diameter batang (mm), jumlah umbi persampel (umbi) dan berat umbi basah per plot (gr). Hasil penelitian menunjukkan bahwa perbaikan stek menunjukkan pengaruh tidak nyata terhadap parameter tinggi tanaman, diameter batang, tetapi berpengaruh nyata terhadap jumlah umbi persampel dan berat umbi basah prplot. Perlakuan cara tanam menunjukkan berpengaruh tidak nyata terhadap parameter jumlah umbi dan berat umbi, tetapi memperlihatkan pengaruh yang nyata terhadap tinggi tanaman dan diameter batang. Interaksi antara perlakuan perbaikan stek dan cara tanam belum memperlihatkan pengaruh yang nyata terhadap semua parameter yang diamati. Kata Kunci: Stek, Cara Tanam, Produksi
Aplikasi Organic Soil Treatment (OST) dan Jarak Tanam terhadap Pertumbuhan dan Produksi Jagung Manis (Zea mays L.) Savitri, Savitri
Serambi Saintia : Jurnal Sains dan Aplikasi Vol 6, No 1 (2018): Serambi Saintia
Publisher : Universitas Serambi Mekkah

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (39.944 KB) | DOI: 10.32672/jss.v6i1.601

Abstract

Penggunaan pupuk an organic selama ini sudah menjadi kebiasaan masyarakat. Namun pemberian pemberian pupuk an organic tidak dapat memperbaiki kondisi tanah. Salah satu alternative untuk mengembalikan keadaan kondisi tanah adalah pengaplikasian pupuk organic. Penelitian ini bertujuan untuk mengetahui pengaruh pemberian pupuk OST dengan jarak tanam yang berbeda terhadap pertumbuhan dan produksi Jagung Manis. Penelitian ini dilaksanakan mulai bulan januari sampai dengan maret 2018. Penelitian ini menggunakan Rancangan Acak Kelompok (RAK) Faktorial yang terdiri dari 2 faktor yaitu pemberian OST (T) yang terdiri dari 3 taraf yaitu T0 = kontrol, T1 = 300 gram per plot dan T3 = 600 gram per plot, sedangkan faktor jarak tanam (P) terdiri dari 4 taraf yaitu P1 =15 x 30 cm, P2 = 15 x 40 cm, P3 = 15 x 50 cm dan P4 = 15 x 60 cm. Terdapat 12 kombinasi perlakuan, yang diulang sebanyak 3 kali sehingga terdapat 36 satuan percobaan. Parameter yang diukur pada penelitian ini adalah tinggi tanaman, total luas daun dan panjang janten. Data yang diperoleh dari hasil penelitian ini di analisis menggunakan daftar sidik ragam (DSR) dan untuk menguji beda rata-rata antar perlakuannya, diuji dengan uji beda nyata terkecil (BNT). Hasil penelitian memperlihatkan bahwa perlakuan pupuk OST dan jarak tanam berpengaruh nyata terhadap parameter tinggi tanaman dan total luas daun, tetapi tidak berpengaruh nyata terhadap panjang janten. Kata Kunci: Pupuk organic, Jarak tanam, Pertumbuhan, produksi, jagung manis
The potential of BASF NPK fertilizers associated with Trichoderma viride fertilizer on the growth and production of shallots (Allium ascalonicum L.) Savitri, Savitri; Usnawiyah, Usnawiyah
Journal of Tropical Horticulture Vol 2, No 1 (2019): April 2019
Publisher : Indonesian Society for Horticulture (Perhimpunan Hortikultura Indonesia Komisariat Aceh)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1383.212 KB) | DOI: 10.33089/jthort.v2i1.18

Abstract

This research was carried out on the Experimental Garden, Faculty of Agriculture, Abulyatama University, Aceh Besar. This research was conducted from September 26th to December 2nd, 2017. This research was assigned in a Completely Randomized Design (CRD) factorial with 3 replications. There were 12 combinations of treatments and 36 units of experiments. The first factor was Trichoderma viride Fertilizer (T) which consists of 4 levels: T0 = 0 gram/polybag, T1=50 g/polybag, T2=100 g/polybag, T3=150 g/polybag. The second factor was BASF NPK Fertilizers (N) consists of 3 levels: N = 0 g/polybag, N1=3 g/polybag, N2=6 g/polybag. The parameters observed in this study were plant height, bulb diameter, wet weight and dry weight of bulbs. The results revealed that various doses of T. viride fertilizer increased the plant height respectively at 20 and 40 days after planting. Surprisingly, there was no significant difference in plant height at 60 days after planting. The best results for the application of T. viride fertilizer were found in T1 (50 g/polybag). This fertilizer also exhibited insignificant results in bulb diameter, wet weight and dry weight of bulbs at all observed ages. The application of BASF NPK fertilizers did not significantly affect all observed parameters (plant height, bulb diameter, wet weight and dry weight of onion bulbs). There were no interactions due to application of T. viride fertilizer and BASF NPK fertilizers to all observed parameters.