bluuebunny/crossref_metadata_2025 huggingface dataset:
Aktivitas Penstabil Oksigen Singlet dari Hasil Fraksinasi Ekstrak Metanol Daun Kayu Manis (Cinnamomum burmanii) terhadap Fotooksidasi Asam Askorbat
Authors: Salim Muhammad Fajrin , Rorong Johnly A. , Katja Dewa G.
Published: July 2019

Telah dilakukan penelitian tentang aktivitas penstabil oksigen singlet dari hasil fraksinasi ekstrak metanol daun kayu manis (Cinnamomum burmanii) terhadap fotooksidasi asam askorbat dengan menggunakan cahaya dan eritrosin sebagai sensitiser. Serbuk daun kayu manis diekstraksi secara maserasi dengan metanol 95 % selama 3 x 24 jam, selanjutnya ekstrak yang diperoleh difraksinasi berturut-turut dengan pelarut n-heksan, etil asetat, butanol dan air. Penentuan kandungan total fenolik diukur dengan metode Folin-Ciocalteu dan aktivitas penstabil oksigen singlet diukur dengan laju penurunan konsentrasi asam askorbat. Hasilnya menunjukkan bahwa fraksi etil asetat memiliki kandungan total fenolik tertinggi yaitu 166,888 mg/g diikuti dengan fraksi butanol, n-heksan, dan air.  Fraksi etil asetat juga memiliki aktivitas penstabil oksigen singlet yang kuat, ditunjukkan dengan laju kerusakan fotooksidatif asam askorbat yang kecil yaitu -0,75 μg.mL-1.min-1A study of singlet oxygen quenching activity has been done from the fractination result of methanol extract of cinnamon leaf (Cinnamomum burmanii) against photo-oxidation of ascorbic acid by using light and erythrosine as sensitized. The cinnamon leaf powder was extracted by macerating with 95% methanol for  3 x 24 hours, then the extracts obtained was fractionated successively with n-hexane, ethyl acetate, butanol and water solvent. The determination of total phenolic content was measured by the Folin-Ciocalteu method and the singlet oxygen quenching activity was measured by the rate of decrease in ascorbic acid concentration. The results show that the ethyl acetate fraction has the highest total phenolic content of 166,888 mg/g followed by the fraction of butanol, n-hexane, and water, respectively. The ethyl acetate fraction also has a strong singlet oxygen quenching activity, indicated by a small photo-oxidative damage rate of ascorbic acid of                  -0.75 μg.mL-1.min-1
Identifikasi Intrusi Air Laut Dengan Menggunakan Metode Geolistrik Konfigurasi Wenner – Schlumberger di Daerah Malalayang Sulawesi Utara
Authors: Pasamba Obed Salu , Tamuntuan Gerald H. , Tanauma Adey
Published: July 2019

Telah dilakukan penelitian eksplorasi geofisika menggunakan metode Geolistrik Konfigurasi Wenner – Schlumberger untuk mengindentifikasi lapisan tanah yang diduga terkena intrusi air laut di daerah Malalayang Sulawesi Utara. Terdapat 5 lintasan pengukuran dan pada setiap lintasan mempunyai 112 dan 167 buah data. Data setiap lintasan diolah menggunakan perangkat lunak RES2DINV. Dugaan intrusi air laut terjadi di daerah Malalayang I Timur sejauh ≤ 300 meter dari garis pantai dengan kedalaman ≥ 10 meter di bawah permukaan tanah dan di daerah Malalayang II sejauh 310 meter dari garis pantai dengan kedalaman ≥ 20 meter di bawah permukaan tanah.Geophysical exploration has been conducted using Geoelectric method of Wenner – Schlumberger Configuration to identify the soil layers suspected of being exposed to seawater intrusion in Malalayang of North Sulawesi. There are 5 measurement lines and each line has 112 and 167 data. The data of each line is processed using RES2DINV software. Suspected seawater intrusion is located in the East Malalayang I area as far as ≤ 300 meters from the coastline with a depth of ≥ 10 meters under ground surface and in Malalayang II area as far as 310 meters from the coastline with a depth of ≥ 20 meters under ground surface.
Pemanfaatan Metode Geolistrik Konfigurasi Dipole-Dipole untuk Investigasi Sumber Air Panas di Kelurahan Paniki Bawah Minahasa Utara
Authors: Kojong Marcella , Tamuntuan Gerald H. , _ Ferdy
Published: July 2019

Telah dilakukan penelitian dengan mengukur nilai resistivitas pada lapisan tanah di Paniki Bawah melalui lintasan yang sudah ditentukan yaitu sebanyak 5 lintasan. Metode yang digunakan dalam penelitian ini adalah metode konfigurasi Dipole-Dipole dengan spasi antar elektroda bervariasi ,  lintasan 1 jarak antar elektorda 10 meter dengan panjang lintasan 480 meter, lintasan 2 dan 3 jarak antar elektroda 5 meter dengan panjang lintasan 240 meter, lintasan 5 dengan jarak 10 meter dengan panjang lintasan 240 meter dan lintasan terakhir jara antar elektroda adalah 5 meter dengan panjang lintasan 120 meter.  Hasil penelitian menunjukkan bahwa tiap-tiap lintasan adanya zona-zona lemah dengan nilai resistivitas <10 Ωm yang diidentifikasikan sebagai lapisan air panas  dan nilai resistivitas >100 Ωm diindikasikan sebagai batuan penghantar panas.Research has been carried out by measuring the resistivity values it the soil layers in the lower Paniki through path already specified as much as 5 trajectory. The methods used in this research is a method of Dipole-Dipole configuration an the configuration of the Pole-Pole with a space between electrodes varies, lap 1 the distance between the electrodes of 10 meters with a long trajectory of 480 metres, the distance between the 2 and 3 electrode 5 meters by track length 240 meters, the 4  track length 240 meters and spacing between electrodes of 10 meters last lap while the distance between the electrode is 5 meter with a long trajectory of 120 meters. The results showed that each path shows the existence of zones of weak value of resistivity <10 Ωm who identify as layers in hot water and resistivity values >100 Ωm rock the hot conductor indicated as.
Variasi Motif Batik Minahasa Berbasis Julia Set
Authors: Kodri Riskika Fauziah , Titaley Jullia
Published: July 2019

Batik adalah corak atau gambar (pada kain) yang pengolahannya diproses dengan cara tertentu biasanya dengan menerakan malam yaitu sejenis lilin pada kain. Batik Minahasa merupakan batik yang menggunakan motif tradisional atau ragam hias dari tanah adat Minahasa, Sulawesi Utara, Indonesia. Batik menjadi warisan budaya Indonesia salah satunya karena motif pada batik yang mengandung filosofi kehidupan masyarakat setempat. Variasi motif pola batik minahasa belum terlalu berkembang walaupun telah ada variasi dari penggabungan motif-motif asli batik Minahasa. Matematika memperkenalkan bentuk fraktal yang memiliki sifat keserupaan diri dan banyak dijumpai pada objek di dunia nyata. Julia Set adalah salah satu jenis fraktal yaitu yang berkaitan dengan bilangan kompleks dan dibangkitkan dari fungsi teriterasi . Tujuan penelitian ini adalah membuat variasi batik minahasa berbasis Julia set. Hasil penelitian menunjukkan dengan memilih sebuah bilangan kompleks  tertentu dengan range  dan memberikan bentuk-bentuk Julia set yang menarik. Menggunakan aplikasi basis fraktal, variasi batik minahasa berbasis Julia set dibuat dari ragam hias tradisional Minahasa dan motif Julia set yang dipilih dengan mengatur properti motif yang ada seperti layer layout, banyak iterasi, lebar, panjang, sudut, peningkatan sudut dan lain-lain.Batik is a motif or ornaments (on cloth) which processed in a certain way usually using malam which is some kind of wax to the cloth. Batik Minahasa is batik with traditional motif or ornament from indigenous land of Minahasa, North Sulawesi, Indonesia. One of the reasons batik become the cultural heritage of Indonesia is because of the motif which contained local people’s life philosophies. Motif variation of batik Minahasa has not much developed even though there are variations made by combining the traditional motifs. Mathematics introduces fractal which has self-similarity characteristic in its shapes and Julia Set is one of fractals object that corresponds to complex numbers and is generated from the iterated function . The purpose of this research is to make variations of batik Minahasa based on Julia set. The results show that by selecting a complex number  within a range of  and  give interesting shapes of Julia sets. Using fractal-based applications, variation of batik Minahasa is made from traditional ornament and Julia Set motif which selected and arranging the properties such as layout layers, multiple iterations, width, length, angles, angle increases and more.
Aktivitas Antioksidan Ekstrak Tumbuhan Suruhan (Peperomia pellucida [L.] Kunth) Pada Asam Linoleat
Authors: Pakasi Jeremy Fransisco , Momuat Lidya I , Koleangan Harry S.J.
Published: July 2019

Penelitian ini bertujuan untuk mempelajari aktivitas antioksidan eksrak tumbuhan suruhan Peperomia pellucida (L.) Kunth pada asam linoleat. Tumbuhan suruhan diekstrak dengan pelarut etanol 80% dan n-heksana dengan cara maserasi selama 48 jam. Ekstrak etanol dan n-heksana dari tumbuhan suruhan diukur kandungan total fenoliknya dengan metode Folin-ciocalteu, serta diuji aktivitas antioksidannya pada asam linoleat menggunakan metode Ferric Thiocyanate untuk menghitung persen penghambatan peroksida, dan metode Thiobarbituric Acid Reactive Substance untuk mengukur persen penghambatan pembentukan malonaldehida. Hasil penelitian kandungan total fenolik dalam ekstrak etanol dan n-heksana tumbuhan suruhan berturut-turut adalah 53.469 mg/kg dan 22.755 mg/kg. Aktivitas antioksidan dari ekstrak etanol tumbuhan suruhan dengan konsentrasi 100 dan 200 µg/mL dalam menghambat pembentukan peroksida berturut-turut sebesar 83.74% dan 88.80%, serta pembentukan malonaldehida sebesar 93.07% dan 93.96% pada asam linoleat.Sedangkan Aktivitas antioksidan dari ekstrak n-heksana tumbuhan suruhan dengan konsentrasi 100 dan 200 µg/mL dalam menghambat pembentukan peroksida berturut-turut sebesar 67.96% dan 73.18%, serta pembentukan malonaldehida sebesar 90.98% dan 92.00% pada asam linoleat.Penelitian ini menyimpulkan bahwa kandungan total fenolik ekstrak etanol tumbuhan suruhan lebih tinggi daripada ekstrak n-heksana, serta aktivitas antioksidan ekstrak etanol adalah yang terbaik dalam menghambat pembentukan peroksida dan malonaldehida pada asam linoleat.This reaserchwas aimed to study the antioxidant activity of Peperomia pellucida (L.) Kunth on linoleic acid. The plant was extracted with 80% ethanol and n-hexane solvent by maceration for 48 hours. The content of total phenolic was measured using the Folin-Ciocalteu method and the antioxidant activity of Peperomia p. wastested on linoleic acid using Ferric Thiocyanate method to calculate the percent inhibition of peroxide and using Thiobarbituric Acid Reactive Substance method for measuring the percent inhibition of malonaldehyde. Total phenolic content of the ethanol extract and the n-hexane extract of Peperomia p. were 53,469 mg/kg and22.755 mg/kg respectively. The antioxidant activities of ethanol extract of Peperomia p. with concentration of 100 and 200 μg/mL in inhibition of peroxide formation were 83,74% and 88,80%, and for malonaldehyde were 93,07% and 93,96% respectively. Whereasthose of n-hexana extracts with the same concentration inhibited 67.96% and 73.18% of peroxide formation, and 90.98% and 92.00% of malonaldehyde formation. Thus,Total content of phenolics of ethanol extract is higher than that of n-hexane extract, similarly the antioxidant activity of ethanol extract is the better in inhibiting the formation of peroxide and malonaldehyde in linoleic acid than that of n-hexana extract.
Penerapan Model ARIMA-GARCH Untuk Memprediksi Harga Saham Bank BRI
Authors: Yolanda Natasya Bella , Nainggolan Nelson , Komalig Hanny A.H.
Published: July 2019

Model time series yang dapat mengakomodasi sifat heteroskedastik adalah model ARCH atau GARCH. Penelitian ini bertujuan untuk menerapkan model ARIMA-GARCH dalam memprediksi harga saham bank BRI. Hasil penelitian menunjukkan bahwa pada harga saham bank BRI terdapat unsur heteroskedastik. Model terbaik yang didapat pada harga saham bank BRI yaitu ARIMA(2,1,1)-GARCH(2,2). Model tersebut memiliki nilai koefisien determinasi atau  (R-squared) yaitu sebesar 0.99916 atau 99,91%Time series model which can accommodate heteroscedasticity is the ARCH or GARCH model. This study aims to apply and determine the ARIMA-GARCH models in predicting stock prices of bank BRI. The result of this research show that in bank BRI stock price there is heteroscedasticity element. The best model obtained in bank BRI stock price that is ARIMA (2,1,1)-GARCH (2,2). The model determination or (R-squared) 0.99916 or 99.91%
Studi Perbandingan Struktur Selulosa Dengan Pretreatment Larutan Ion Pada Kayu Cempaka (Elmerillia Ovalis)
Authors: Sehe Muhamad RIfai , Sangian Hanny F. , Tongkukut Seni H.J
Published: July 2019

Penelitian ini bertujuan untuk menentukan struktur selulosa dari serbuk kayu cempakasebelum dan sesudah pretreatment menggunakan SEM, XRD, dan FTIR. Serbuk kayu cempaka ditreatment menggunakan larutan ion dengan konsentrasi 10%, 20%, dan 27% garam. Hasilnya menunjukan bahwa secara X-ray Diffraction ukuran partikel terkecil terjadi pada treatment dengan konsentrasi 27% garam yaitu 2,8 nm. Secara spktrum inframerah terjadi perubahan yang signifikan  yang ditunjukan pada gugus fungsi O-H streaching dengan bilangan gelombang 3317,56 . Selanjutnya ukuran pori terkecil  terjadi pada konsentrasi yang sama dan tergolong sebagai membran konvonsional filtrasi.This study aims to determine the cellulosic structure of wood powder before and after pretreatment using SEM, XRD, and FTIR. Chestnut wood powder is treated using ion solution with concentration of 10%, 20%, and 27% salt. The results showed that X-ray Diffraction of the smallest particle size occurred in treatment with 27% salt concentration whose the size was  of 2.8 nm. In infrared spktrum there was a significant change shown in the O-H streaching function group with wave number 3317.56 . Furthermore, the smallest pore size occurred at the same concentration the highest precentegc of salt and is classified as conventional filtration membrane.
Pemetaan Distribusi Petir Untuk Wilayah Manado Tahun 2013 Dan 2014
Authors: Mailoor Michelle Jenneth , Pasau Guntur , Bobanto Maria D.
Published: July 2019

Telah dilakukan penelitian untuk memetakan distribusi petir untuk wilayah Manado berdasarkan data petir tahun 2013 dan 2014. Data real time sambaran petir dari rekaman lightning detector diolah menggunakan beberapa program, yaitu Lightning 2000, Golden Software Surfer 8, Lightning Data Processing, GIS 10.3, Google Earth dan Microsoft Excel. Pada program GIS 10.3 data yang didapatkan kemudian dipetakan menggunakan metode Kriging. Hasil yang diperoleh dalam penelitian ini berupa peta kontur distribusi petir di wilayah Kota Manado. Berdasarkan hasil dari pengolahan data, diperoleh data yang menunjukkan bahwa kejadian petir tertinggi terdapat pada bulan Oktober 2013 yaitu sebanyak 6.540 kejadian dan bulan Mei 2014 yaitu sebanyak 7.330 kejadian petir. Distribusi petir CG+ tertinggi terdapat pada kecamatan Wenang dan tidak ada kejadian petir CG+ di 4 kecamatan yaitu Kecamatan Tikala, Paal Dua, Singkil dan TumintingResearch has been done to make a distribution map for Manado area based on lightning data of year 2013 and 2014. The real time data of lightning strikes from lightning detector processed by using a few program that is Lightning 2000, Golden Software Surfer 8, Lightning Data Processing, GIS 10.3, Google Earth and Microsoft Excel. Data that we got from GIS 10.3 use for mapping with Kriging method. Output from this research is contour map in Manado city area. Based on output from processed data, we got data that the highest lightning event happened in October 2013 that is 6.540 event and in May 2014 that is 7.330 lightning event. Highest CG+ lightning distribution located in Wenang Districts and there is no CG+ lightning event in 4 districts which is Tikala, Paal Dua, Singkil and Tuminting Districts
Perbandingan Konfigurasi Wenner Alfa, Wenner-Schlumberger, Dipol-dipol Dan Pol-dipol Dalam Metode Geolistrik Tahanan Jenis Untuk Mendeteksi Keberadaan Air Tanah
Authors: Puluiyo Juwana , - As’ari , Tongkukut Seni H.J
Published: July 2019

Telah dilakukan penelitian untuk mencari konfigurasi yang paling tepat dalam eksplorasi sumber daya air (air tanah) dengan metode geolistrik tahanan jenis konfigurasi Wenner Alfa, Wenner-Schlumberger, Dipol-dipol dan Pol-dipol menggunakan Resistivity meter (multichannel and multielectrode resistivity and IP meter simultaneous channel merek MAE X612-EM). Pengukuran dilakukuan pada 4 lintasan dengan panjang bentangan 96 meter dan pengolahan data menggunggunakan perangkat lunak (softwere) RES2DINV.Hasil penelitian ini menunjukkan bahwa konfigurasi Dipol-dipol adalah konfigurasi yang paling efektif dan efisien dalam mendeteksi keberadaan air tanah dengan karakteristik : waktu eksekusi 24 menit, jumlah data 609 buah, kedalaman 16 meter dan jumlah data pereksekusi 5 titik.Research has been done to find the most appropriate configuration in the exploration of water resources (groundwater) with the geoelectrical Resistivity method of configuration Wenner Alfa, Wenner-Schlumberger, Dipole-dipole and Pole-dipole by using Resistivitymeter (multichannel and multielectric resistivity and IP meter simultaneous channel brand MAE X612-EM). Measurements were performed on 4 line with a stretch length of 96 meters and data processing used software RES2DINV.The results of this study indicate that Dipole-dipole configuration is the most effective and efficient configuration in detecting the presence of groundwater with the characteristics : 24 minutes execution time, 609 pieces of data, 16 meters depth and 5 points of execution data.
Analisis Volatilitas Harga Eceran Komoditas Beberapa Pangan Utama di Kota Manado Menggunakan Model ARCH
Authors: Nainggolan Wanri , Nainggolan Nelson , Komalig Hanny A.H.
Published: July 2019

Konsumsi bahan pangan utama seperti cabai rawit merah dan tomat apel selalu menjadi sorotan bagi kalangan masyarakat, hal  ini disebabkan oleh harga yang tidak tetap dan selalu berfluktuasi pada setiap periode. Besaran perubahan harga yang menunjukkan fluktuasi pasar dalam satu periode waktu ( volatilitas ) merupakan gambaran seberapa besar resiko yang akan dihadapipara pelaku ekonomi pada masa yang akan datang. Volatilitas dalam penelitian ini dibangun menggunakan modelAutoregressive Conditional Heteroskedasticit (ARCH). Tujuan dari penelitian ini adalah untuk menentukan volatilitas harga eceran dari beberapa komoditas pangan utama yaitu cabai rawit merah  dan tomat apel di Kota Manado. Penelitian ini menggunakan data sekunder periode Januari 2013 – Desember 2016. Hasil penelitian menunjukkan bahwa model volatilitas untuk cabai rawit merah dan tomat apel adalah model ARCH (1)The main food consumption such as red pepper and apple tomato has always been the spotlight for the society, this is due to the fixed price and always fluctuate in every period. The magnitude of price changes that indicate market fluctuations in a period of time (volatility) is a picture of how much risk will be faced by economic actors in the future. Volatility in this research was built using Autoregressive Conditional Heteroskedasticit (ARCH) model. The purpose of this study is to determine the retail price volatility of some major food commodities namely red chili and apple tomatoes in Manado City. This study uses secondary data from January 2013 to December 2016. The results showed that the volatility model for red cayenne and apple tomato was ARCH (1) model
Identifikasi Bakteri Endofit Daun Ficus Minahassae (Teijsm. & De Vriese) Miq. Berdasarkan Gen 16s rRNA
Authors: Linelejan Yosua Th. , Umboh Stela D. , Tallei Trina E.
Published: July 2019

Bakteri endofit telah ditemukan hampir di semua tumbuhan yang telah diteliti. Bakteri-bakteri ini mengkolonisasi jaringan internal tumbuhan inang. Di Sulawesi Utara terdapat salah satu tumbuhan ara, yaitu Ficus minahassae, yang hanya tumbuh lokal di daerah ini dan Filipina. Tujuan dari penelitian ini yaitu untuk mengidentifikasi dari bakteri endofit yang mendiami daun F. minahassae. Isolasi bakteri endofit dilakukan dengan menebarkan ekstrak daun yang steril di atas permukaan media Nutrient Agar. Isolat murni yang diperoleh diidentifikasi menggunakan penanda gen 16S rRNA. Dari hasil penanaman ekstrak daun F. minahassae diperoleh dua isolat, yaitu YL1 yang koloninya berwarna kuning, dan YL2 yang koloningnya berwarna krem. Dengan melakukan proses BLAST di GenBank, YL1 memiliki kemiripan 100 % dengan Brachybacterium muris, sedangkan YL2 memiliki kemiripan 99 % dengan Pseudacidovorax intermedius. Analisis filogenetik yang dilakukan menggunakan metode UPGMA yang terintegrasi pada piranti lunak Geneious memperlihatkan perbedaan taksa dari bakteri endofit yang ditemukan pada daun F. minahassae.Endophytic bacteria have been found in virtually every plant studied. These bacteria colonize the internal tissue of the host plant. In North Sulawesi there is a fig plant named Ficus minahassae which is endemic to the area and the Philippines. This research was aimed to identify of the endophytic bacteria inhabit the endosphere of the leaf of F. minahassae. Isolation of endophytic bacteria was performed by spreading the sterile leaf extract onto NA media. The pure isolates were identified using 16S rRNA gene marker. There were two isolates, designated as YL1 and YL2, were isolate from the leaf of F. minahassae. The color of isolate YL1 was yellowish and YL2 was creme. Using BLAST nucleotide, YL1 showed 100 % similarity with Brachybacterium muris, and YL2 showed 99 % similarity with Pseudacidovorax intermedius. Phylogenetic analysis performed using UPGMA method integrated on Geneious software showed different taxa from endophytic bacteria found on F. minahassae leaf.
Sistem Kontrol Atap Otomatis Tempat Penjemuran Berbasis Mikrokontroler Arduino UNO dan Node Sensor
Authors: Kobandaha Tesal , Mosey Handy I.R , Suoth Verna A.
Published: July 2019

Telah dilakukan penelitian untuk simulasi dan realisasi node sensor system control atap otomatis tempat penjemuran berbasis mikrokontroler. Node sensor yang dibangun terdiri atas mikrokontroler ArduinoUNO yang dirangkai denganbeberapa sensor seperti sensor suhu dan kelembaban, sensor hujan, sensor cahaya, dan motor servo. Metode Penelitian yang digunakan adalah metode eksperimen yakni dengan merancang perangkat lunak dan membangun perangkat keras. Pembacaan sensor hujan dan sensor cahaya dijadikan penentu untuk menutup dan membuka atap otomatis. Kinerja node sensor telah dianalisis dan dibandingkan dengan alat ukur terstandar. Hasil pengujian menunjukan node sensor sistemkontrol bekerja sesuai yang diharapkan. Node sensor mampu menutup dan membuka atap secara otomatis pada kondisi hujan dan/atau gelap dan kipas dinyalakan saat kondisi kelembaban melebihi nilai ambang batas yang ditetapkan.Research had been conducted to simulate and realize an automatic roof control system for drying warehouse based on microcontroller and sensor node. The sensor node is consisted of Arduino UNO microcontroller that is strung together with sensors for temperature and humidity, rain sensor, light sensor and motor servo. The research method was experimental with designing the software and  constructing the hardware. The rain sensor and the light sensors reading were fed to the microcontroller as an input to close and open the roof automatically. Sensor node performance then was analyzed and compared with the standardized instrument. The test result showed that sensor node was working as expected in which the sensor node can opened and closed  the roof automatically when it was raining in the dark condition. Moreover,  the fan was turned on when the humidity condition exceed the threshold value.Telah dilakukan penelitian untuk simulasi dan realisasi node sensor system control atap otomatis tempat penjemuran berbasis mikrokontroler. Node sensor yang dibangun terdiri atas mikrokontroler ArduinoUNO yang dirangkai denganbeberapa sensor seperti sensor suhu dan kelembaban, sensor hujan, sensor cahaya, dan motor servo. Metode Penelitian yang digunakan adalah metode eksperimen yakni dengan merancang perangkat lunak dan membangun perangkat keras. Pembacaan sensor hujan dan sensor cahaya dijadikan penentu untuk menutup dan membuka atap otomatis. Kinerja node sensor telah dianalisis dan dibandingkan dengan alat ukur terstandar. Hasil pengujian menunjukan node sensor sistemkontrol bekerja sesuai yang diharapkan. Node sensor mampu menutup dan membuka atap secara otomatis pada kondisi hujan dan/atau gelap dan kipas dinyalakan saat kondisi kelembaban melebihi nilai ambang batas yang ditetapkan.
Optimasi Kapasitas Pembangkit Listrik Tenaga Hybrid (PLTH) di Pulau Bunaken Menggunakan Software HOMER
Authors: Soba Andreas , Suoth Verna Albert , Kolibu Hesky Stevy
Published: July 2019

Telah dilakukan penelitian tentang sistem pembangkit listrik tenaga hybrid menggunakan Software  HOMER (Hybrid Optimization Model For Electric Renewables). Tujuan dari penelitian ini untuk optimasi pembangkit listrik tenaga hybriddi Pulau Bunaken yang efisien dengan metode simulasi menggunakan software HOMER. Hasil penelitian menghasilkan rancangan sistem PLTH yang optimal adalah skenario 2 dengan kontribusi Pembangkit Listrik Tenaga Surya (PLTS) sebesar 1.374.514 kWh pertahun (61%),Pembangkit Listrik Tenaga Diesel (PLTD) sebesar 879.024 kWh pertahun (39%) dan kelebihan energi listrik pada skenario2  sebesar 1.018.247 kWh pertahun (45,2 %). Nilai Net Present Cost (NPC) terendah sebesar US$ 3.981.811. Nilai Cost Of Energy (COE) terendah sebesar 0,334 $/kWh. Sistem ini dapat mengurangi emisi gas buang sebesar 805.750 kg/tahun jika dibayarkan untuk penalti emisi gas buang sebesar US$ 178.965 per tahunResearch about hybrid power plant using HOMER (Hybrid Optimization Model For Electric Renewables) software has been done. The purpose of this research is to optimaze an efficiency hybrid power plant at Bunaken Island with simulation method using HOMER software. The simulation showed that an optimal design for hybrid power plant system isat the second scenario.The solar power plant contribute to 1.374.514 kWh per year (61%), the diesel power plant contribute to 879.094 kWh per year (39%) and electricity exceed in scenario 2 is 1.018.247 kWh per year (45,2%). The lowest NPC value is US$ 3.981.811. The lowest COE value is 0,334 $/kWh.The system can reduce the exhaust gas emission is about 805.750 kg/year.It was equal pay for exhaust gas emission penalty the amount is US$178.965 per year
Kesiapsiagaan Siswa dalam Menghadapi Bencana Gempa Bumi dan Letusan Gunung Api Soputan(Studi Kasus pada SMA Negeri 1 Tombatu dan SD GMIM 1 Silian)
Authors: Mosey Handy I.R. , Mongi Charles E. , Sangian Hanny F. , Woran Henkie F.
Published: July 2019

Telah dilakukan penelitian untuk mengetahui pengaruh penyuluhan dan sosialisasi pengetahuan tentang gempa bumi dan letusan gunung api terhadap kesiapsiagaan siswa menghadapi kedua bencana ini pada SMA Negeri 1 Tombatu dan SD GMIM 1 Silian. Penelitian ini menggunakan bersifat deskriptif yaitu penelitian yang bertujuan untuk melihat gambaran sebab dan akibat antar variabel penelitian tanpa membuat perbandingan atau menghubungkan dengan variabel lain. Sedangkan metode yang digunakan adalah metode survei dengan menggunakan kuesioner yang berisi pertanyaan terstruktur untuk mendapatkan informasi yang spesifik. Data tingkat pengetahuan dan keterampilan menyelamatkan diri dari bencana gempa bumi dan letusan gunung api didapatkan dari hasil pengisiankuesioner pretest dan posttest.. Hasil pengolahan data menunjukan nilai-P sebesar 0,001 dan nilai-T sebesar 3,76 untuk siswa SMA Negeri 1 Tombatu dan nilai-P sebesar 0,000 dan nilai-T sebesar -21,42 untuk siswa SD GMIM 1 Silian. Dari hasil ini dapat ditarik kesimpulan bahwa terdapat peningkatan tingkat pengetahuan dan keterampilan para siswa setelah mendapat penyuluhan dan pelatihan tentang kesiapsiagaan menghadapi bencana gempabumi dan letusan gunungapiResearch had been carried out to investigate the effect of disaster preparedness and mitigation counseling to students in Tombatu Public High School (SMA Negeri 1 Tombatu) and GMIM Elementary Private School in Silian (SD GMIM 1 Silian). Descriptive survey was used in this research by using questionnaire that contained structured question to get specific information needed for this research. The students knowledge and skill for surviving earthquake and volcanic eruption are measured with pretest and posttest questionnaire.  The result obtained from questionnaire shows that P-value is 0,001 and T-value is 3.76 for students in SMA Negeri 1 Tombatu and P-value is 0,000 and T-value is -21.42 for students in SD GMIM 1 Silian. From this result we conclude that disaster preparedness and mitigation counseling can give significance to students knowledge and skill for surviving earthquake and volcanic eruption.
Kajian Eksperimen Perbandingan Nilai Konduktivitas Bahan Kuningan, Baja Tahan Karat, dan Aluminium Menggunakan PASCO Heat Conduction Apparatus TD-8513
Authors: Suoth Verna Albert , Kolibu Hesky Stevy , Mosey Handy I.R , Kulon Tiffany M.J.
Published: July 2019

Konduktivitas panas adalah salah satu karakteristik suatu bahan yang menunjukkan nilai aliran panas yang mengalir dalam satu luasan. Dalam studi eksperimental ini, nilai konduktivitas diuji dan di bandingkan dengan menggunakan Peralatan Konduksi Panas PASCO TD-8573.  Peralatan ini memiliki 4 bar metal : satu Almunium, satu Baja tahan karat, dan dua Kuningan dengan potongan lintas yang berbeda. Salah satu bagian ujung dari tiap bar di panaskan atau didinginkan dengan alat peltier. Tiap bar memiliki 10 kilo ohm termistor yang tertancap 3 cm satu sama lain. Tujuan dari studi ini adalah untuk mengukur konduktivitas panas dari Kuningan, Baja tahan karat, dan Almunium. Hasilnya, konduktivitas Almunium adalah yang terbesar diikuti oleh Kuningan, dan yang terakhir Baja tahan karatHeat conductivity is one of the characteristics of a material which shows the amount of heat flowing across one unit of area. In this experimental study, the conductivity values are tested and compared using PASCO Heat Conduction Apparatus TD-8513. The apparatus has four metal bars: one aluminum, one stainless steel, and two brass with different cross-sections. One end of each bar is heated or cooled by a Peltier device. Each bar has two 10 kΩ thermistors embedded about 3 cm from each other. The purpose of this study was to measure the heat conductivity of  Brass, Stainless steel, and Aluminum. The results, the conductivity of Aluminum was biggest were followed with Brass were and finally the Stainless steel
Teknik Budidaya Lobster (Cherax quadricarinatus) Air Tawar di Balai Budidaya Air Tawar (BBAT) Tatelu
Authors: Lengka Kedis , Kolopita Magdalena
Published: July 2019

The aimed of this field practice was to study the hatchery technique of freshwater lobster at Board of Freshwater Aquaculture, Tatelu (BBAT). During this practice, all the hatchery activities were conducted according to BBAT standar procedures. The number of broodstocks used in this practice was 225 females and 53 males. These broodstocks were propagated in mating pond for two weeks. Broodstocks having eggs were moved into hatching tank individually. Afterward, broodstock was removed into another tank while larvae were kept in hatching tank for 10 days. Larvae were cultivated in concrete tank for one month. Data collected included surviral rate, weight and length of lobster, and water quality. Survival rate of larvae was 50%. Water quality in broodstock tank was temperature 28,4 0C, pH 7,5; DO 5,6 mg/l, in hatching pond was temperature 27,23 0C, pH 7,5; DO 5,2 mg/l. In general, lobster hatchery consisted of tank preparation, boroodstock culture, broodstock seletion, hatching, larvae rearing, feeding, water quality contol, pest and disease prevention, harvest. Key Words: Hatchery, lobster, broodstocks.
Pakan suspensi daging kekerangan bagi pertumbuhan benih sidat (Anguilla bicolor)
Authors: Koroh Pieter A , Lumenta Cyska
Published: July 2019

Abstract The objective  of this research was to evaluate the effect of different mussel flesh suspension feed in providing best growth and feed efficiency on eel seeds, Anguilla bicolor. Treatment feed included A (kijing Taiwan Anodonta woodiana Lea)), B (keong mas Pomacea canaliculata), C (kerang darah Anadara granosa) and D (commercial pellet), each with three replications. Elver was reared in plastic container having diameter of 40 cm. Research results showed the best relative growth and feed efficiency were achieved in treatment A with relative growth 64.95% and feed efficiency 4.41, followed by treatment C (relative growth 40.97% and feed efficiency 2.73), Treatment D (relative growth 32.71%% and feed efficiency 2.23), and treatment B (relative growth 31.61% and feed efficiency 2.17).  During the experiment, water temperature was 26-28oC and pH 7  which were suitable for growth and survival of eel seeds. As conclusion, the use of suspension food of kijing taiwan mussel  resulted in the best relative growth and food efficiency.   Keywords: elver, fish feed, mussel, growth, food efficiency
Identifikasi Parameter KualitasAir untuk Kepentingan Marikultur di Kabupaten Kepulauan Sangihe Provinsi Sulawesi Utara
Authors: Mudeng Joppy D , Ngangi Edwin L.A , Rompas Robert J
Published: July 2019

The aimed of research was to identify and analyze the natural resources potential for mariculture development in Regency of Sangihe Archipelago. This research was carried out at Talengen waters in Central  Tabukan District and Manalu waters in South Tabukan District.  Research method was survey and the data was analyzed descriptively.   Primary data to be collected included water quality and socio economic data.  The second was obtained through interview to respondent chosen randomly.  Questionnaire was also used in collecting data.  Research result  showed that water quality at Talengen and Manalu waters was optimal and thus feasible for mariculture. However,  the development of mariculture at these locations should consider other utilization whether for fishery, ecotourism and conservation. Keywords:  mariculture, water quality, Talengen Waters, Manalu Waters
Pertumbuhan Benih Ikan Nila (Oreochromis niloticus) dengan Menggunakan Pakan Komersil yang Diberi Tambahan “Bakasang”
Authors: Mujiono Faisal , Sampekalo Julius , Lumenta Cyska
Published: July 2019

The objectives of research were to evaluate the effect bakasang-supplemented commercial diet on nile tilapia growth and to find the optimum dosage of bakasang to be supplemented in feed. The research was conducted at Laboratory of Nutrition and Fish Feed Technology.  Fish weighing 0,9-1,7 g were palced in 15 aquaria at a density of 10 individuals/aquarium. Experimental design was complete randomized design with five treatments namely A (0% bakasang), B (2% bakasang), C (3% bakasang), D (4% bakasang), E (5% bakasang), each with three replications. Fish were fed three times a day as much as 5%/body weight. Growth of fish was observed every week. Research results showed that the lowest absolute growth, relative growth and feed efficiency  were observed in treated with 0% bakasang (êG=20.44 g; GR=148.08%; dan NEP=58.06%) while the highest was obtained in fish treated with 4% bakasang (êG=35,55 g; GR=262.17%; NEP=80.53%).  Analysis of variance displayed the use of bakasang significantly affect absolute growth, relative growth. It was concluded that feed supplemented with 4% bakasang gave better absolute growth, relative growth and feed efficiency as compared to other feed.   Keywords: growth, “bakasang”, absolute growth, relative growth, feed efficiency,  nile tilapia
IPTEK bagi masyarakat (IbM) kelompok petani ikan di Desa Eris, Kecamatan Eris, Kabupaten Minahasa
Authors: Sinjal Hengky J , Watung Juliaan Ch
Published: July 2019

The purpose of this community service in term of IbM was to transfer the aquaculture technology such as sex reversal, immunostimulant, feed formulation and financial management training to fish farmer at Eris Village. The methods used included elucidation, explanation, training and field practice. The results showed that fish farmers actively participated in discussion and practicing the given subjects.  In addition, farmers were able to increase their skill and knowledge about how to produce male fish fingerling, how to formulate fish feed and immunostimulant and how to manage their financial. Products resulted through this service were appropriate according the standard criteria. Continuous guidance from university and government is required to ensure the success of this service activity.   Keywords: fish farmer, sex reversal, immunostimulant, fish feed, financial management, Eris Village
Karakterisasi lingkungan perairan Teluk Talengen Kabupaten Kepulauan Sangihe sebagai kawasan budidaya rumput laut Kappaphycus alvarezii
Authors: Schaduw Joshian N.W. , Ngangi Edwin
Published: July 2019

This paper was the result of a feasibility analysis of Talengen Bay Waters for aquaculture of Kappaphycus alvarezii. Feasibility analysis of water was based on the environmental data and water quality parameters of Talengen Bay. One mistake in the development of aquaculture is environmentally unsuitable. In order to develop aquaculture properly, appropriate water conditions data were required. Suitable aquatic environments are required by organisms for their survival because they are related to the patterns and behavior of the biota. In connection with the problems of mariculture at Talengen Bay, several efforts were required to overcome them. One of the efforts was made through this study that was assessment of appropriate location for the cultivation of seaweed. Talengen Gulf was located in  in the territory of Kampung  Talengen and  Kampung Bunga Lawang, Central District of Tabukan, Sangihe Islands Regency, North Sulawesi. Laboratory analysis was conducted at the Laboratory of Industrial Baristand Manado. Determination of research stations done intentionally (purposive sampling). Based on the results obtained it could then be concluded that the condition of the aquatic environment and water quality parameters in the Talengen Bay were categorized as suitable for seaweed cultivation K. alvarezii. Phosphate, nitrate, Total Suspended Solid data were needed to be considered. Keywords: Environmental characteristics, seaweed, aquaculture; Kappaphycus alvarezii
Pengaruh penggunaan substrat yang berbeda terhadap daya tetas telur dan sintasan hidup larva ikan lele sangkuriang (Clarias sp)
Authors: Arunde Edwar , Sinjal Hengki J , Monijung Revol D. D
Published: July 2019

This  research aimed to study the influence of  different substrats on fertility and survival of catfish larva (Clarias Sp). This Research was conducted at Tatelu Village of  North Minahasa regency,  Province of North Sulawesi.  Experimental design used was Complete Randomized Design with four treatments including ijuk, Hydrilla, plastic rope, and control (without substrat), each with three replication. The result of this research showed that ijuk gave  significant effect on fertility and survival of  larva.   Fertility and survival of larva in this substrat achieved 77.58% and 87.33%  each. Keywords : Fertility, survival rate, larva, Clarias sp
Efikasi Bakasang sebagai imunostimulan pada pakan sidat (Anguilla marmorata) terhadap infeksi Aeromonas hydrophila
Authors: Janis Olvi A.P. , Tumbol Reiny A. , Longdong Sammy
Published: July 2019

The purpose of this study was to examine the effect of fish silages, bakasang as an immunostimulant in eel (Anguilla marmorata) feed against Aeromonas hydrophila infection. Three hundred elvers with the size of + 10 cm taken from Freshwater Aquaculture Institute (BBAT) Tatelu. The elvers were placed into 4 glass aquarium, each equipped with aerator and 1 for stock. Prior to the study, the eels were acclimatized for two weeks in order to adapt to new environmental condition. Two sets of researches were done: feeding the eels with additional bakasang with different doses for 6 weeks, which then further were challenged with Aeromonas hydrophila by immersion method. This study used a completely randomized design (CRD) with 4 treatments A (0 mL /kg diet), B (50 mL/kg diet), C (100 mL/kg diet), D (150 mL/kg diet). The growth data was taken by measuring the weight and length of the eels at the end of the period of feeding treatment while the mortality data of the eels were observed for 10 days after challenge test.  The results of analysis of variance showed that the resistance of the eels in treatment B (50 mL/kg diet), C (100 mL/kg diet) and D (150 mL/kg diet) significantly different compared with treatment A.  However, among the treatments B, C and D, there were no significant differences.  Furthermore, the best eel growth was observed in treatment B with an absolute growth of 1.14 g, followed by treatment of D with an absolute growth of 1.04 g. In treatment A the absolute growth was only 0.82 g while treatment C was 0. 88 g.  This suggests that the addition of bakasang in eels feed can promote the growth of eels as well as resistance against pathogen infection, thus served as immunostimulant. Keywords: fish silages, immunostimulant, eel,  Aeromonas hydrophila, growth
Pengaruh pemberian beberapa jenis pakan pada pertumbuhan ikan kerapu Cantang Epinephelus sp di Karamba Jaring Apung di Teluk Talengen Kepulauan Sangihe
Authors: Tumadang Liswara S.N. , Sampekalo Julius , Lantu Sartje
Published: July 2019

The research was conducted in floating net cage for at Talengen Island Sangihe to study the growth of grouper (46-70 g in average) fed various type of feed including fish flesh, pellet, cassava, sago) for six weeks, and to determine the food conversion ratio of each food type. The treatments consisted of A (fish flesh), B (fish flesh + cassava), C (fish flesh+sago), D (pellet). Fish was culture in 12 floating net cages measuring 1x1x1,5 m each, 10 fish/cage. Research results showed that the highest weight gain was achieved in fish in treatment C (87.6%), followed by treatment A (76.1%) , B (69.8%), and D (52.5%).  Statistically, treatment C was significantly different  compared to treatment A, B and D. The use of fish flesh combined with sago was able to improve growth of grouper Kata kunci : Kerapu Cantang,  growth, food conversion ratio, floating net cage
Penggunaan ragi roti (Saccharomyces cerevisiae) sebagai imunostimulan untuk meningkatkan resistensi ikan mas (Cyprinus carpio L) terhadap infeksi bakteri Aeromonas hydrophila
Authors: Manoppo Henky , Kolopita Magdalena E.F.
Published: July 2019

A research had been conducted to evaluate the use of baker’s yeast as immunostimulant in enhancing the resistance of carp (Cyprinus carpio L) to Aeromonas hydrophila infection.  Experimental fish were obtained from Freshwater Aquaculture Board in Talelu, Minahasa Regency, and transported to the Laboratory of Aquaculture Technology at the Faculty of Fisheries and Marine Science, Sam Ratulangi University. During two weeks of  acclimatization process, fingerlings were fed with commercial feed (pellet) at 5% of body weight per day, twice a day.  After acclimatization, fish was randomly distributed into 15 aquaria with a density of 25 fishes/aquarium. The doses of yeast cells as treatments included 5, 10, 15 and 20 g yeast/kg of pellet while control pellet not supplemented with yeast cell. Fish was fed with treatment pellets for four consecutive weeks at 5% of body weight per day,  twice daily at 09.00 am and 16.00 pm. Afterward, the density of fish were adjusted to 10 fish/aquarium. Fish were then challenged with A. hydrophila through intraperitoneal injection of  0.2 mL of A. hydrophila suspension containing 1x107 cfu/mL. Research result showed that supplementation of yeast cells into fish pellet significantly influenced the resistance of fish to A. hydrophila infection (p<0,01). The highest resistance were observed in fish fed pellet supplemented with 5 g yeast/kg of pellet. Thus, supplementation of  baker’s yeast cells into commercial fish feed was able to increase  resistance of carp to A. hydrophila infection.   Keywords: baker’s yeast, Cyprinus carpio, A. hydrophila, resistance, intraperitoneal injection
Respon kebal nonspesifik ikan mas yang diberi imunostimulan ragi roti secara oral
Authors: Yanuar Aditya P. , Manoppo Henky
Published: July 2019

The effect of baker’s yeast as immunostimulant on innate immunity of carp (Cyprinus carpio L) had been investigated.  Fish was gathered from Freshwater Aquaculture Board (BBAT) Tatelu, Province of North Sulawesi.  The fish were acclimatized for a week in 15 aquariua with a density of 25 fish/aquarium. After acclimatization the fish were fed pellet supplemented with baker’s yeast as immunostimulant at 0, 5, 10, 15 and 20 g / kg of feed for four weeks as much as 5%/body weight of fish/day with the frequency of feeding twice a day at 08.00 am and 16.00 pm . This study used Completely Randomized Design (RAL) with five treatments and each treatment had three replications. Immune parameters consisting of total leucocytes and phagocytosis activity were measured in the last week. After  four weeks of feeding, the total leukocytes from the carp fed with the addition of baker’s yeast 10 g / kg of feed were significantly increased compared with the fish not being fed with the addition of bread yeast (p <0.01). Phagocytic activity of phagocyte cells from carp also increased significantly in fish fed pellet with the addition of 5 g of baker’s yeast / kg of feed (p = 0.01). In conclusion, the addition of baker’s yeast as immunostimulant in the diet at 5-10 g/kg of pellet can increase the nonspecific immune response of carp. Keywords:  baker’s yeast, carp, nonspesific immune response, total leucocytes, phagocytosis activity
Pengaruh perbedaan salinitas terhadap pertumbuhan kepiting bakau, Scylla serrata
Authors: Sitaba Rifan D. , Salindeho Indra R.N. , Kusen Diane J.
Published: July 2019

The aims of the research were to find out firstly, the growth rate of the mud crab Scylla Serrata) reared under different salinity levels and secondly, the range of the salinity where the mud crab optimally grows.   The experiment was conducted at the Laboratory of Aquaculture Technology, FPIK, UNSRAT, from April to May 2017.  The experiment was set up according to the Randomized Block Design, with 3 treatments, which were 3 different salinity levels, 10 ppt, 20 ppt and 30 ppt.  The tested level of salinity was determined based on the preliminary experiment.  Each treatment was triplicated, and each replicate represents the group of the initial weight of the tested crab, which was 80-89 grams (group-1), 70-79 grams (group-2), and 60-69 grams (group-3).  The tested mud crabs were collected from the estuarine waters of Inobonto river, which has salinity level of 12 ppt.  The tested crabs were weighed at the beginning and at the end of the experiment, and at the interval of 7 days during the experiment period.  The weight of the tested crabs data were converted into Absolute Growth Rate (AGR) and Daily Growth Rate (DGR), which in turn were statistically analyzed using Anova for Randomized Block Design, and then Least Significant Difference Test.  The results of the Least Significant Difference Test show that the absolute and daily growth rate of the tested crabs in the salinity of 10 ppt are not significantly different with those in the salinity of 20 ppt.  While the lowest absolute and daily growth rate of the tested crabs were in the salinity of 30 ppt and are significantly different with those in the salinity of 10 and 20 ppt.  Hence, in order to get a maximal production, the mud crab, Scylla serrata, should be cultured in the waters with a range of salinity between 10 and 20 ppt.Keywords: Mud crab, salinity, growth