53 research outputs found
Potensi Sumberdaya Alam Pasir Besipantai Arakan Kabupaten Minahasa Selatan
Full text linkPOTENSI SUMBERDAYA ALAM PASIR BESIPANTAI ARAKAN KABUPATEN MINAHASA SELATAN Adey Tanauma1) dan Ferdy1) 1)Program Studi Fisika FMIPA Universitas Sam Ratulangi, Manado 95115 ABSTRAK Pasir besi merupakan salah satu sumberdaya alam di Sulawesi Utara yang belum dimanfaatkan secara optimal. Salah satu lokasi yang cukup potensial untuk mendapatkan endapan pasir besi ini adalah pesisir pantai Arakan. Penelitian ini bertujuan untuk menentukan sifat-sifat magnetik endapan pasir besi yang terdapat di pesisir Pantai Arakan kabupaten Minahasa Selatan Provinsi Sulawesi Utara. Suseptibilitas magnetik dan magnetisasi saturasi sampel pasir besi Arakan mengindikasikan bahwa kandungan mineral magnetik yang dominan adalah magnetite. Ukuran bulir dari mineral magnetik terutama magnetite didominasi oleh bulir-bulir magnetik berukuran besar atau bulir magnetik dengan domain magnetik antara pseudosingle domain dan multi domain. Tingginya kandungan mineral magnetik berdasarkan nilai karakterisasinya, terutama nilai suseptibilitas magnetik memberikan peluang untuk pemanfaatan lebih lanjut dari sumberdaya alam ini. Kata kunci: histeresis magnetik, pasir besi, suseptibilitas THE POTENTIAL OF NATURAL RESOURCES OF IRON SAND IN ARAKAN COASTAL SUBPROVINCE OF SOUTH MINAHASA ABSTRACT Iron sand represent one of the natural resources in North Sulawesi which not yet been exploited in optimally. One of the location which quite potential to get this iron sand sediment is coastal area of Arakan. This research aim to determine the nature of magnetic of iron sand sediment which there are in coastal area of Arakan, Sub-province of South Minahasa, Province of North Sulawesi. Magnetic suseptibility and saturation magnetization of iron sand sampel of Arakan indicated that dominant magnetic mineral is magnetite. Seed size measure of magnetic mineral especially magnetite predominated by big sized magnetic seeds or magnetic seed with magnetic domain between domain pseudosingle and multi domain. The height content of magnetic mineral based on characteristic value, especially magnetic suseptibility give the opportunity for furthermore exploiting of this natural resources
Keselamatan Dan Keamanan Laboratorium IPA
Full text linkLaboratorium adalah tempat untuk melakukan percobaan maupun pelatihan yang memerlukan dorongan budaya keselamatan dan keamanan, sehingga lingkungan itu menjadi tempat yang aman untuk mengajar, belajar, dan bekerja. Pengelolaan keselamatan dan keamanan laboratorium IPA merupakan tanggung jawab bersama baik pengelola maupun pengguna, oleh karena itu setiap orang yang terlibat harus memiliki kesadaran dan merasa terpanggil untuk mengatur, memelihara, dan mengusahakan keselamatan kerja. Staf guru dan murid SMA merupakan salah satu pengguna fasilitas laboratorium yang perlu memahami pengelolaan tentang keselamatan dan keamanan laboratorium.Saat mengelolah bahan laboratorium, tidak semua resiko bisa ditiadakan.Keselamatan dan keamanan laboratorim dapat ditingkatkan melalui penilaian resiko berdasarkan informasi dan pengelolaan resiko yang cermat.Bahan kimia ramah lingkungan merupakan falsafah perancangan produk dan proses yang mengurangi atau meniadakan penggunaan dan terciptanya bahan berbahayaThe laboratory is a place to conduct experiments as well as training that require the encouragement of safety and security culture, so that the environment becomes a safe place for teaching, learning, and working. The management of the safety and security in the science laboratory is a shared responsibility of both the manager and the user, therefore everyone involved must be aware and feel compelled to organize, maintain, and work for safety. Teacher staff and high school students are among the users of laboratory facilities who need to understand the management of laboratory safety and security. When managing laboratory materials, not all risks can be eliminated. The safety and security of the laboratory can be enhanced through risk-based risk information and risk assessment. Eco-friendly chemicals are the philosophy of designing products and processes that reduce or eliminate the use and creation of hazardous material
Pola Variasi Reguler Medan Magnet Bumi Di Tondano
Full text linkData variasi medan magnet bumi komponen horisontal diambil dari komputer akuisisi yang merekam data secara real time. Dibuat grafik data magnet bumi komponen horisontal versus waktu per hari. Dipilih grafik quite days dan dibandingkan dengan quiet days di Lerwick (Inggris). Dihitung nilai rata-rata dari Quiet days yang sama perbulan untuk dijadikan pola variasi reguler bulanan, sehingga dalam satu tahun dapat dibuat dua belas pola variasi reguler medan magnet bumi. Hasilnya menunjukkan bahwa variasi reguler medan magnet bumi polanya teratur, nilai variasi tertinggi berkisar 39308,3– 39409,5 nT pada kisaran waktu 02:39–03:38 Universal Time. Pola variasi reguler medan magnet bumi digunakan sebagai acuan untuk menganalisis variasi harian medan magnet bumi. Pada tahun 2011 tercatat badai besar geomagnet sebanyak 11 kali yang nilai variasinya berkisar 71–20 nT dengan nilai K indeks sama dengan lima.Data variation of the horizontal component of the earth's magnetic field was taken from the acquisition computer which records data in real time. Graphs describing the horizontal component data versus time were created daily. Graphs of quiet days were selected and compared with quiet days in Lerwick (England). Average value the same of quiet days were calculated in order to create monthly regular variation pattern, so that in one year there were twelve regular variation patterns of the earth 's magnetic field created. The results showed that the regular variations of the earth 's magnetic field is on a regular pattern, the value of the highest variation ranged 39308.3-39409.5 nT at around 2:39 to 3:38 Universal Time. Regular variation patterns of the earth 's magnetic field were used as references for analyzing the daily variation of the earth 's magnetic field. In 2011, the large geomagnetic storms were recorded 11 times, the value of the variation range 71–20 nT with the K index value equal to five
Truth, purification and power: Foucault's genealogy of purity and impurity in and after The Will to Know lectures
No full textFoucault’s 1970–71 lectures at the Collège de France, The Will to Know, highlight the significance of themes of purity and impurity in Western thought. Reflecting on these themes coincided with the emergence of Foucault’s theory of power. This article presents the first analysis of Foucault’s investigation of purity and impurity in The Will to Know lectures, identifying the distinctive theory Foucault offers of purity as a discursive apparatus addressing correspondence between the subject and the truth through the image of relative integrity or mixture. It then traces Foucault’s subsequent reflections on these themes in his later writings on disciplinary power. The implications of Foucault’s position are considered; the article will close by putting Foucault’s ideas in dialogue with those of Kristeva, and in considering the role that purity and impurity may play in resistance
Linking behavior and diet between and within populations of an invasive crayfish faxonius rusticus
Full text linkThis Thesis was approved for publication on 2019-07-01 at 16:29.DSpace SAF Submission Ingestion Package generated from Vireo submission #14108 on 2019-11-26 at 14:00:39Made available in DSpace on 2019-11-26T20:58:34Z (GMT). No. of bitstreams: 2
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Previous issue date: 2019-07-01Embargo set by: Seth Robbins for item 113031
Lift date: 2021-11-26T20:58:44Z
Reason: Author requested closed access (OA after 2yrs) in Vireo ETD systemEmbargo set by: Seth Robbins for item 113031
Lift date: 2021-11-26T20:59:54Z
Reason: Author requested closed access (OA after 2yrs) in Vireo ETD systemOpen Restriction set for Item 113031 on 2021-01-20T23:00:12Z with date null by [email protected] Restriction set for Item 113031 on 2021-01-20T23:00:18Z with date null by [email protected] and mesocosm studies are often employed to study basic and applied ecology due to the complexities and lack of external controls in field environments. However, studies conducted on the same questions at different scales do not always have the same results. In my thesis, I used stable isotopes to relate laboratory behavior to field function within and between populations. In my first study, I explored whether stable isotopes of carbon and nitrogen could be used to relate laboratory dominance of Rusty Crayfish Faxonius rusticus to their field diet. I assessed whether methodological decisions around tissue analyzed for stable isotopes, laboratory acclimation time, and timing of primary consumer collection affects this relationship. I hypothesized that more dominant crayfish would have higher trophic positions, and tissues with faster turnover rates may exhibit a stronger association between laboratory behavior and recent field function. I failed to find a relationship regardless of these different methodological choices However, I still find this method promising, as other laboratory behaviors may be more related to diet or competition for food, such as exploration or feeding flexibility. In my second study, I expanded this method of relating behavior to diet through stable isotope analysis for questions between, rather than within, populations of F. rusticus. Here, I aimed to determine the relationship between individual specialization and relative population abundances or intraspecific competition. Theoretical studies propose a direct, positive relationship between abundance and individual specialization; however, empirical studies have not always supported these predictions. I assessed behavioral and dietary specialization across a gradient of relative population abundances of F. rusticus. I found a unimodal relationship between relative abundance and dietary specialization, likely due to limited food resources in high abundance lakes. Alternatively, I found a positive linear relationship between relative abundance and behavioral specialization, because this metric of individual specialization is not resource limited (i.e. density dependent). These results indicate that discrepancies between theoretical and empirical studies of the relationship between individual specialization and intraspecific competition might be a consequence of the metric of specialization used. My thesis shows that linking organismal diet and behavior with stable isotopes may be a useful approach in ecology and evolution, but may be best applied to questions between rather than within populations.Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2021-08-01The student, Amaryllis Adey, accepted the attached license on 2019-06-28 at 13:53.The student, Amaryllis Adey, submitted this Thesis for approval on 2019-06-29 at 16:07
Efek Perubahan Struktur Pati Singkong Yang Dilakukan Pretreatment Dengan Larutan Ion Dan Gelombang Mikro Terhadap Produksi Gula
Full text linkPenelitian ini bertujuan untuk menganalisis hubungan perubahan struktur pati singkong terhadap produksi gula sebelum dan sesudah pretreatment gelombang mikro dan larutan ion. Pretreatment gelombang mikro dilakukan dengan meradiasikan gelombang elektromagnetik daya tertentu dengan tiga durasi yang berbedat pada substrat. Pretreatment larutan ion dilakukan dengan merendam substrat dalam larutan ion dengan dua konsentrasi garam selama empat hari dan kemudian dibandingkan dengan non-pretreatment. Substrat dikarakterisasi dengan XRD, FTIR dan SEM untuk menganalisis perubahan strukturnya. Produksi. Hasil karakterisasi menunjukkan bahwa struktur kristal pati menjadi lebih amorf dan ikatan antar molekulnya semakin lemah setelah dilakukan pretreatment. Morfologi permukaan bahan menjadi lebih kasar setelah terpapar radiasi microwave. Disisi lain, jumlah fiber pada substrat semakin berkurang setetelah direndam dalam larutan ion. Ketika substrat dihidrolisis, kandungan gula yang didapatkan lebih tinggi daripada tanpa pretreatment.This research aims to analyze the correlation of the structural change on sugar production of cassava starch before and after microwave and ionic liquid pretreatments. A microwave pretreatment was carried out by radiating electromagnetic wave with fixed power with three different durations on the substrate. The ionic liquid pretreatment was conducted by soaking the substrate in to saline water with two salt concentrations for four days and the results were compared to non-pretreatment. Then, the substrates were measured by XRD, FTIR and SEM to analiyze the structural changes. The characterization result showed that the starch crystal structure became more amorphous and molecules bonds were weaker after pretreatment. The surface morphology was rougher after being radiated by microwave. On the other hand, the fiber contents of substrate decreased after soaked on ionic liquid. When substrate were hidrolized, the sugar obtained were higher than without pretreatment
Investigasi Air Tanah di Daerah Sea Kabupaten Minahasa Dengan Menggunakan Geolistrik Resistivitas Konfigurasi Dipol-Dipol
Full text linkPenyebaran air tanah yang tidak merata dipengaruhi oleh faktor-faktor jenis batuan, bentuk topografi permukaan, jenis vegetasi dan jumlah curah hujan suatu tempat. Eksplorasi geofisika metode geolistrik tahanan jenis konfigurasi dipol-dipol digunakan untuk mengidentifikasi sebaran akuifer air tanah di desa Sea  Kabupaten Minahasa. Data diolah menggunakan software Res2Dinv dan menghasilkan peta model resistivitas bawah permukaan 2 dimensi yang menggambarkan keadaan lapisan tanah. Teridentifikasi sebaran akuifer air tanah permukaan dengan kedalaman ≤ 20 m di sepanjang lintasan pengukuran. Akuifer air tanah dalam diidentifikasi pada lintasan 1 dengan kedalaman sampai 30 m dan 60 m. Akuifer air tanah dengan kedalaman< 60 m mempunyai potensi dijadikan sebagai sumber air tanahThe uneven distribution of ground water is influenced by factors such as rock type, surface topography, vegetation type and the amount of rainfall in a place. Geophysical exploration of the dipole-dipole configuration type of geoelectric resistivity method is used to identify the distribution of groundwater aquifers in Sea village, Minahasa District. The data is processed using Res2Dinv software and produces a 2-dimensional subsurface resistivity model map that describes the state of the soil layer. Distribution of surface ground aquifer with a depth of ≤ 20 m along the measurement line was identified. Deepwater aquifers were identified in l1ne 1 with depths up to 30 m and 60 m. Groundwater aquifers with a depth of <60 m have the potential to be used as ground water source
Pengaruh tempat pembuangan akhir sampah terhadap mutu air tanah sekitarnya di desa Sitimulyo, Kecamatan Piyungan, Kabupaten bantul, Daerah Istimewa Yogyakarta
No full textPemetaan Akuifer Air Tanah Di Sekitar Candi Prambanan Kabupaten Sleman Daerah Istimewa Yogyakarta Dengan Menggunakan Metode Geolistrik Tahanan Jenis
Full text linkTelah dilakukan penelitian yang bertujuan untuk memetakan keberadaan akuifer air tanah di sekitar Candi Prambanan Kabupaten Sleman Daerah Istimewa Yogyakarta berdasarkan resistivitas batuan bawah permukaan hasil eksplorasi geofisika dengan metode geolistrik tahanan jenis. Penelitian dilakukan terhadap 31 titik sounding yang terbagi menjadi 6 lintasan. Setiap lintasan dibuat model struktur lapisan tanah di bawah permukaan. Air tanah yang tersimpan dalam akuifer dapat dieksplorasi dengan studi geofisika menggunakan metode geolistrik. Hasil eksplorasi diolah menggunakan software IP2WIN,menghasilkan model perlapisan bawah permukaan Bumi berdasarkan nilai resistivitasnya (2D) yang kemudian dioalah dengan software Surfer 8 untuk menghasilkan gambar tiga dimensi. Berdasarkan model struktur lapisan tanah di bawah permukaan ini diperoleh: a) lapisan akuifer air tanah dangkal dengan kedalaman antara ( 1 – 5 meter ) yang tersebar di Kecamatan Prambanan : Desa Bugisan (titik sounding 7) Desa Taji (titik sounding 14, 15, 23, 24, dan 31). b) lapisan akuifer air tanah dalam dengan kedalaman ( 25 – 100 meter ) yang tersebar di Kecamatan Prambanan : Desa Bugisan (titik sounding 1, 2, 3, 4, dan 5), Desa Tlogo (titik sounding 12, 16, dan 25). Di Kecamatan Kalasan : Desa Taman Martani (titik sounding 8, 9, 10, 17, 18, 19, 20, 21, 26, 27, 28, 29, dan 30
Sixteen discourses on several practical and important subjects. By William Adey, Curate of Lanchester. Durham [electronic resource].
No full textWith a final leaf of errata.A different work from that with the same title published in Newcastle upon Tyne in 1760.With a list of subscribers.Electronic reproduction.English Short Title Catalog,Reproduction of original from British Library
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