Defrianto Pratama, Kunlestiowati Hadiningrum, Ratu Fenny Muldiani
Penelitian ini sebagai studi awal untuk mengetahui pengaruh temperatur fluida terhadap karakteristik aliran (laminar, transisi atau turbulen) dengan melihat perubahan tekanan, laju aliran dan bilangan Reynold pada belokan pipa. Aliran fluida (air) disimulasikan dengan software Ansys Fluent, kemudian didapatkan data perubahan tekanan, laju dan bilangan Reynold sepanjang pipa dengan belokan pipa 900. Hasil analisis data simulasi menunjukan bahwa setelah melewati belokan pipa 900, fluida dengan temperatur berbeda akan memiliki karakteristik aliran yang berbeda.
{"title":"Studi Awal Pengaruh Temperatur terhadap Karakteristik Aliran Fluida Pada Belokan Pipa 90° melalui Simulasi","authors":"Defrianto Pratama, Kunlestiowati Hadiningrum, Ratu Fenny Muldiani","doi":"10.35799/jm.v11i2.41826","DOIUrl":"https://doi.org/10.35799/jm.v11i2.41826","url":null,"abstract":"Penelitian ini sebagai studi awal untuk mengetahui pengaruh temperatur fluida terhadap karakteristik aliran (laminar, transisi atau turbulen) dengan melihat perubahan tekanan, laju aliran dan bilangan Reynold pada belokan pipa. Aliran fluida (air) disimulasikan dengan software Ansys Fluent, kemudian didapatkan data perubahan tekanan, laju dan bilangan Reynold sepanjang pipa dengan belokan pipa 900. Hasil analisis data simulasi menunjukan bahwa setelah melewati belokan pipa 900, fluida dengan temperatur berbeda akan memiliki karakteristik aliran yang berbeda. ","PeriodicalId":53333,"journal":{"name":"Jurnal MIPA","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80300760","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Hiperkolesterolemia yang ditandai dengan meningkatnya kadar kolesterol total >200 mg/dL. Hiperkolesterolemia dapat meningkatkan risiko terjadinya aterosklerosis yang merupakan penyebab utama Penyakit Jantung Koroner (PJK). Indeks Aterogenik Plasma (IAP) dan Indeks Risiko Koroner (IRK) merupakan parameter yang baik untuk melihat risiko terjadinya aterosklerosis dan PJK. Virgin Coconut Oil (VCO) telah diketahui memiliki potensi antikolesterol. Tujuan dari penelitian ini mengetahui pengaruh pemberian VCO terhadap nilai IAP dan IRK pada mencithiperkolesterolemia. Sebanyak 25 ekor mencit jantan galur DDY dibagi menjadi 5 kelompok yaitu (1) Kontrol negatif diberi saline 0,9%; (2) Kontrol positif diberi minyak trans/MT 200 mg/kgBB; (3) MT+VCO 200 mg/kgBB; (4) MT+VCO 400 mg/kgBB; dan (5) MT+VCO 600 mg/kgBB. Perlakuan diberikan selama 56 hari. Darah diambil secara non invasif pada hari ke-57 melalui vena lateral ekor mencit untuk mengukur profil lipid plasma yaitu kolesterol total, trigliserida (TG), High Density Lippoprotein (HDL) dan Low Density Lipoprotein (LDL) plasma menggunakan alat uji cepat Lipid Pro®. Nilai Indeks Aterogenik Plasma (IAP) yaitu log (TG/HDL) dan Indeks Risiko Koroner yaitu Kolesterol Total/HDL. Nilai IAP pada mencit yang diberi VCO adalah 0,08-0,22 (kategori risiko=rendah) berbeda nyata dari kelompok kontrol positif sebesar 0,82±0,078 (kategori risiko=tinggi). Nilai IRK pada mencit yang diberi VCO adalah 1,4-2,4 (kategori risiko=rendah) berbeda nyata dari kelompok kontrol positif 5,3±0,67 (kategori risiko=tinggi) (sig<0,05). Dosis VCO 600mg/kgBB adalah dosis optimal menurunkan risiko IAP dan IRK mencit hiperkolesterolemia dengan kategori risiko rendah. Pemberian VCO selama 8 minggu mampu menurunkan nilai IAP dan IRK pada mencit hiperkolesterolemia.
{"title":"PENGARUH VIRGIN COCONUT OIL (VCO) TERHADAP NILAI INDEKS ATEROGENIK PLASMA (IAP) DAN INDEKS RISIKO KORONER (IRK) PADA MENCIT HIPERKOLESTEROLEMIA","authors":"Atin Supiyani, Thalita Asriandina, Tripeni Kurniati","doi":"10.35799/jm.v11i2.42188","DOIUrl":"https://doi.org/10.35799/jm.v11i2.42188","url":null,"abstract":"Hiperkolesterolemia yang ditandai dengan meningkatnya kadar kolesterol total >200 mg/dL. Hiperkolesterolemia dapat meningkatkan risiko terjadinya aterosklerosis yang merupakan penyebab utama Penyakit Jantung Koroner (PJK). Indeks Aterogenik Plasma (IAP) dan Indeks Risiko Koroner (IRK) merupakan parameter yang baik untuk melihat risiko terjadinya aterosklerosis dan PJK. Virgin Coconut Oil (VCO) telah diketahui memiliki potensi antikolesterol. Tujuan dari penelitian ini mengetahui pengaruh pemberian VCO terhadap nilai IAP dan IRK pada mencithiperkolesterolemia. Sebanyak 25 ekor mencit jantan galur DDY dibagi menjadi 5 kelompok yaitu (1) Kontrol negatif diberi saline 0,9%; (2) Kontrol positif diberi minyak trans/MT 200 mg/kgBB; (3) MT+VCO 200 mg/kgBB; (4) MT+VCO 400 mg/kgBB; dan (5) MT+VCO 600 mg/kgBB. Perlakuan diberikan selama 56 hari. Darah diambil secara non invasif pada hari ke-57 melalui vena lateral ekor mencit untuk mengukur profil lipid plasma yaitu kolesterol total, trigliserida (TG), High Density Lippoprotein (HDL) dan Low Density Lipoprotein (LDL) plasma menggunakan alat uji cepat Lipid Pro®. Nilai Indeks Aterogenik Plasma (IAP) yaitu log (TG/HDL) dan Indeks Risiko Koroner yaitu Kolesterol Total/HDL. Nilai IAP pada mencit yang diberi VCO adalah 0,08-0,22 (kategori risiko=rendah) berbeda nyata dari kelompok kontrol positif sebesar 0,82±0,078 (kategori risiko=tinggi). Nilai IRK pada mencit yang diberi VCO adalah 1,4-2,4 (kategori risiko=rendah) berbeda nyata dari kelompok kontrol positif 5,3±0,67 (kategori risiko=tinggi) (sig<0,05). Dosis VCO 600mg/kgBB adalah dosis optimal menurunkan risiko IAP dan IRK mencit hiperkolesterolemia dengan kategori risiko rendah. Pemberian VCO selama 8 minggu mampu menurunkan nilai IAP dan IRK pada mencit hiperkolesterolemia.","PeriodicalId":53333,"journal":{"name":"Jurnal MIPA","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74781796","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Septa Windy Nitalessy, M. Mananohas, R. Tumilaar, Angelina Patricia Amanda, Tesalonika Angela Tumey
The Maximum Distance Separable (MDS) code is one of the codes that known as error-correcting code where the generator matrix [I|A] is arranged by the identity matrix and the MDS matrix. In coding, MDS matrix can detect and correct errors optimally. A matrix over the Zq is called an MDS matrix if and only if all the determinants of its square submatrix are non-zero. A matrix over the Zq is called an MDS matrix if and only if all the determinants of its square submatrix are non-zero. In m x m matrix over Zq, the analyzed of possible entries and determinants of submatrix can be declare the existence of an MDS matrix of size m x m over Zq. The result is there will be no MDS matrix of size m x m where m greater than or equal to [(q-1)^2 + 1] - [q-2] for Zq with any of q. For Zq with q prime, there will be no MDS matrix of size m x m where m greater than or equal to [(q-1)^2 + 1] - [q-2] - [1/2 x (q-1)].
最大距离可分离码(MDS)是纠错码的一种，其产生矩阵[I|A]由单位矩阵和最大距离可分离矩阵组成。在编码过程中，MDS矩阵可以最优地检测和纠正错误。一个矩阵在Zq上被称为MDS矩阵当且仅当它的平方子矩阵的所有行列式都是非零的。一个矩阵在Zq上被称为MDS矩阵当且仅当它的平方子矩阵的所有行列式都是非零的。在Zq上的m × m矩阵中，对子矩阵的可能元素和行列式的分析可以声明存在一个大小为m × m / Zq的MDS矩阵。结果是不存在大小为m x m且m大于或等于[(q-1)^2 + 1] - [q-2]的MDS矩阵。对于具有q '的Zq，不存在大小为m x m且m大于或等于[(q-1)^2 + 1] - [q-2] - [1/2 x (q-1)]的MDS矩阵。
{"title":"Maximum Distance Separable (MDS) Matrix of size m x m over Zq","authors":"Septa Windy Nitalessy, M. Mananohas, R. Tumilaar, Angelina Patricia Amanda, Tesalonika Angela Tumey","doi":"10.35799/jm.v11i2.41387","DOIUrl":"https://doi.org/10.35799/jm.v11i2.41387","url":null,"abstract":"The Maximum Distance Separable (MDS) code is one of the codes that known as error-correcting code where the generator matrix [I|A] is arranged by the identity matrix and the MDS matrix. In coding, MDS matrix can detect and correct errors optimally. A matrix over the Zq is called an MDS matrix if and only if all the determinants of its square submatrix are non-zero. A matrix over the Zq is called an MDS matrix if and only if all the determinants of its square submatrix are non-zero. In m x m matrix over Zq, the analyzed of possible entries and determinants of submatrix can be declare the existence of an MDS matrix of size m x m over Zq. The result is there will be no MDS matrix of size m x m where m greater than or equal to [(q-1)^2 + 1] - [q-2] for Zq with any of q. For Zq with q prime, there will be no MDS matrix of size m x m where m greater than or equal to [(q-1)^2 + 1] - [q-2] - [1/2 x (q-1)].","PeriodicalId":53333,"journal":{"name":"Jurnal MIPA","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74183981","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Berbagai faktor di lingkungan berkontribusi besar dalam pembentukan radikal bebas di mana paparan yang terus menerus akan mengakibatkan stress oksidatif. Radikal bebas dan stress oksidatif dapat dicegah dan dihambat dengan antioksidan. Salah satu bahan yang berpotensi, mudah ditemukan dan mempunyai harga terjangkau adalah kayu secang (Caesalpinia sappan L). Senyawa antioksidan berhubungan sangat erat dengan lingkungan tempat tumbuh. Perlu dilakukan penelitian untuk mengidentifikasi senyawa flavonoid dan aktivitas antioksidan Kayu Secang yang berasal dari tempat tumbuh lain yang berbeda. Jenis penelitian ini adalah deskriptif dengan pendekatan analisis laboratorium. Tahapan penelitian meliputi persiapan bahan tanaman, ekstraksi dengan metode maserasi, identifikasi flavonoid dengan uji mikrokimiawi (uji warna), uji kadar flavonoid dengan metode spektrofotometri ultraviolet-cahaya tampak/UV-Vis, dan uji aktivitas antioksidan dengan metode DPPH. Hasil penelitian menunjukkan ekstrak etanol kayu secang mengandung flavonoid yang ditandai dengan adanya warna jingga, kadar flavonoid total 0.1136 mg EQ/ ml, dan memiliki aktivitas antioksidan (IC50) sebesar 56.32 µg/mL. IC50 vitamin C sebesar 10.69 µg/mL. Dari hasil penelitian ini disimpulkan ekstrak etanol kayu secang dari Kabupaten Situbondo berpotensi sebagai sumber antioksidan alami yang mengandung flavonoid dengan kadar 0.1136 mg EQ/ ml, lebih rendah dibanding vitamin C. Namun aktivitas antioksidan ekstrak etanol kayu secang tergolong dalam katagori kuat
{"title":"Perbandingan Aktivitas Antioksidan Bahan Alami Dan Bahan Sintetis (Study Pada Kayu Secang dan Vitamin C)","authors":"Ulfa Nurullita, Estri Irawati","doi":"10.35799/jm.v11i2.40089","DOIUrl":"https://doi.org/10.35799/jm.v11i2.40089","url":null,"abstract":"Berbagai faktor di lingkungan berkontribusi besar dalam pembentukan radikal bebas di mana paparan yang terus menerus akan mengakibatkan stress oksidatif. Radikal bebas dan stress oksidatif dapat dicegah dan dihambat dengan antioksidan. Salah satu bahan yang berpotensi, mudah ditemukan dan mempunyai harga terjangkau adalah kayu secang (Caesalpinia sappan L). Senyawa antioksidan berhubungan sangat erat dengan lingkungan tempat tumbuh. Perlu dilakukan penelitian untuk mengidentifikasi senyawa flavonoid dan aktivitas antioksidan Kayu Secang yang berasal dari tempat tumbuh lain yang berbeda. Jenis penelitian ini adalah deskriptif dengan pendekatan analisis laboratorium. Tahapan penelitian meliputi persiapan bahan tanaman, ekstraksi dengan metode maserasi, identifikasi flavonoid dengan uji mikrokimiawi (uji warna), uji kadar flavonoid dengan metode spektrofotometri ultraviolet-cahaya tampak/UV-Vis, dan uji aktivitas antioksidan dengan metode DPPH. Hasil penelitian menunjukkan ekstrak etanol kayu secang mengandung flavonoid yang ditandai dengan adanya warna jingga, kadar flavonoid total 0.1136 mg EQ/ ml, dan memiliki aktivitas antioksidan (IC50) sebesar 56.32 µg/mL. IC50 vitamin C sebesar 10.69 µg/mL. Dari hasil penelitian ini disimpulkan ekstrak etanol kayu secang dari Kabupaten Situbondo berpotensi sebagai sumber antioksidan alami yang mengandung flavonoid dengan kadar 0.1136 mg EQ/ ml, lebih rendah dibanding vitamin C. Namun aktivitas antioksidan ekstrak etanol kayu secang tergolong dalam katagori kuat","PeriodicalId":53333,"journal":{"name":"Jurnal MIPA","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85476854","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Celine Rani Kaligis, P. Maabuat, Roni Koneri, E. Handoyo
Padang lamun merupakan ekositem laut dangkal yang memiliki peran ekologis yang penting bagi kawasan ekosistem pesisir. Padang lamun berfungsi sebagai tempat mencari makan, tempat pemijahan, tempat pengasuhan bagi berbagai jenis ikan dan Echinodermata serta berperan sebagai stabilisator perairan. Penelitian ini bertujuan untuk menginventarisasi dan menganalisis keanekaragaman spesies lamun di Pulau Mantehage Sulawesi Utara. Penelitian ini menggunakan metode transek kuadrat yang dimodifikasi dari metode Seagrass Watch, dengan menarik transek sepanjang 25m ke arah tubir dengan 3 kali ulangan pada 5 lokasi berbeda, dengan menggunakan frame kuadrat ukuran 50cm x 50cm dengan jarak antara kuadrat satu dengan yang lainnya adalah 5 m. Berdasarkan hasil penelitian diperoleh bahwa di Pulau Mantehage pada lima lokasi penelitian ditemukan tujuh spesies lamun yaitu Halodule pinifolia, Cymodocea rotundata, Syringodium isoetifolium, Thalassodendron ciliatum, Enhalus acoroides, Thalassia hemprichii dan Halophila spinulosa. Indeks keanekaragaman diperoleh bahwa di Desa Tangkasi merupakan lokasi dengan indeks keanekaragaman tertinggi dengan nilai 1.36, dan di Pulau Paniki dengan indeks keanekaragaman terendah dengan nilai 0.67
{"title":"Keanekaragaman Lamun Di Pesisir Pulau Mentahage Kecamatan Wori, Kabupaten Minahasa Utara, Propinsi Sulawesi Utara","authors":"Celine Rani Kaligis, P. Maabuat, Roni Koneri, E. Handoyo","doi":"10.35799/jm.v11i2.38692","DOIUrl":"https://doi.org/10.35799/jm.v11i2.38692","url":null,"abstract":"Padang lamun merupakan ekositem laut dangkal yang memiliki peran ekologis yang penting bagi kawasan ekosistem pesisir. Padang lamun berfungsi sebagai tempat mencari makan, tempat pemijahan, tempat pengasuhan bagi berbagai jenis ikan dan Echinodermata serta berperan sebagai stabilisator perairan. Penelitian ini bertujuan untuk menginventarisasi dan menganalisis keanekaragaman spesies lamun di Pulau Mantehage Sulawesi Utara. Penelitian ini menggunakan metode transek kuadrat yang dimodifikasi dari metode Seagrass Watch, dengan menarik transek sepanjang 25m ke arah tubir dengan 3 kali ulangan pada 5 lokasi berbeda, dengan menggunakan frame kuadrat ukuran 50cm x 50cm dengan jarak antara kuadrat satu dengan yang lainnya adalah 5 m. Berdasarkan hasil penelitian diperoleh bahwa di Pulau Mantehage pada lima lokasi penelitian ditemukan tujuh spesies lamun yaitu Halodule pinifolia, Cymodocea rotundata, Syringodium isoetifolium, Thalassodendron ciliatum, Enhalus acoroides, Thalassia hemprichii dan Halophila spinulosa. Indeks keanekaragaman diperoleh bahwa di Desa Tangkasi merupakan lokasi dengan indeks keanekaragaman tertinggi dengan nilai 1.36, dan di Pulau Paniki dengan indeks keanekaragaman terendah dengan nilai 0.67","PeriodicalId":53333,"journal":{"name":"Jurnal MIPA","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77869951","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Analisis variabilitas denyut jantung (HRV) berdurasi panjang berguna sebagai teknik noninvasif untuk asesmen terhadap aktivitas sistem saraf otonom. Analisis Ini menginformasikan banyak faktor fisiologis dan patologis yang memodulasi detak jantung normal. Namun performa sistem analisis HRV sangat bergantung pada keakurasian pendeteksian R-peak dari QRS complex. Detak yang disebabkan oleh kesalahan deteksi dapat menggangu hasil HRV, yang mengakibatkan masalah signifikan dalam interpretasinya. Terutama sifatnya yang berdurasi panjang, maka diperlukan sistem deteksi R-peak yang andal. Penelitian ini bertujuan membangun sistem akuisisi data multimodal dari data EKG dan data pulsa SPO2 untuk mendapatkan hasil deteksi R-peak yang lebih reliabel dibanding dengan hanya menggunakan data EKG saja. Namun demikian, hasil akhir sistem keseluruhan ditentukan oleh metode pendeteksian yang nantinya digunakan .
{"title":"Rancang Bangun Oksimeter Pulsa yang Diintegrasikan dengan EKG sebagai Alat Ukur Multimodal untuk Analisis HRV","authors":"David Pang, H. Kolibu","doi":"10.35799/jm.v11i1.39058","DOIUrl":"https://doi.org/10.35799/jm.v11i1.39058","url":null,"abstract":"Analisis variabilitas denyut jantung (HRV) berdurasi panjang berguna sebagai teknik noninvasif untuk asesmen terhadap aktivitas sistem saraf otonom. Analisis Ini menginformasikan banyak faktor fisiologis dan patologis yang memodulasi detak jantung normal. Namun performa sistem analisis HRV sangat bergantung pada keakurasian pendeteksian R-peak dari QRS complex. Detak yang disebabkan oleh kesalahan deteksi dapat menggangu hasil HRV, yang mengakibatkan masalah signifikan dalam interpretasinya. Terutama sifatnya yang berdurasi panjang, maka diperlukan sistem deteksi R-peak yang andal. Penelitian ini bertujuan membangun sistem akuisisi data multimodal dari data EKG dan data pulsa SPO2 untuk mendapatkan hasil deteksi R-peak yang lebih reliabel dibanding dengan hanya menggunakan data EKG saja. Namun demikian, hasil akhir sistem keseluruhan ditentukan oleh metode pendeteksian yang nantinya digunakan .","PeriodicalId":53333,"journal":{"name":"Jurnal MIPA","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81159280","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Julia Angel Rumbay, Roni Koneri, Marnix L. D. Langoy, Eko Handoyo, Pandu Wijaya
Public perception of turtle conservation in an area will determine the success of turtle conservation activities. This study aims to analyze the perception of tour guide groups towards turtle conservation on the coast of Bunaken Island, Bunaken National Park, Manado, North Sulawesi. The research method was carried out by means of observation and surveys. Collecting data in the form of interviews with a questionnaire guide. The selection of respondents was carried out by purposive sampling with the target group of tour guides, especially dive guides. Data analysis was carried out using a qualitative descriptive method. The results showed that most of the respondents (78%) already understand about turtle conservation and no longer consume turtles (100%). The turtle habitat which includes coral reefs and seagrasses still supports the presence of turtles and turtles are almost visible at all observation locations. The understanding of turtle conservation by dive guides is quite good, but to maintain the sustainability of conservation so that it is maximized, it is necessary to provide guidance and supervision to the diving guides and also to the surrounding community.
{"title":"Persepsi Kelompok Pemandu Wisata Terhadap Konservasi Penyu di Pesisir Pulau Bunaken, Taman Nasional Bunaken, Manado, Sulawesi Utara","authors":"Julia Angel Rumbay, Roni Koneri, Marnix L. D. Langoy, Eko Handoyo, Pandu Wijaya","doi":"10.35799/jm.v11i1.38902","DOIUrl":"https://doi.org/10.35799/jm.v11i1.38902","url":null,"abstract":"Public perception of turtle conservation in an area will determine the success of turtle conservation activities. This study aims to analyze the perception of tour guide groups towards turtle conservation on the coast of Bunaken Island, Bunaken National Park, Manado, North Sulawesi. The research method was carried out by means of observation and surveys. Collecting data in the form of interviews with a questionnaire guide. The selection of respondents was carried out by purposive sampling with the target group of tour guides, especially dive guides. Data analysis was carried out using a qualitative descriptive method. The results showed that most of the respondents (78%) already understand about turtle conservation and no longer consume turtles (100%). The turtle habitat which includes coral reefs and seagrasses still supports the presence of turtles and turtles are almost visible at all observation locations. The understanding of turtle conservation by dive guides is quite good, but to maintain the sustainability of conservation so that it is maximized, it is necessary to provide guidance and supervision to the diving guides and also to the surrounding community.","PeriodicalId":53333,"journal":{"name":"Jurnal MIPA","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77487990","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Previously, an in vitro study of the SPF value of a cream formulation with active ingredients from broiler eggshells was conducted using UV-vis spectrophotometry at a wavelength of 290-320 nm and obtained an SPF value of 8.335 at a concentration of 9000 ppm. This study aims to continue testing the UV protective activity in vivo on creams from these active ingredients with combination of adding 5% titanium dioxide. The experimental animals used consisted of 12 female rabbits divided into 4 groups, namely (1) positive control: market product spf 15, (2) Negative control: cream base, (3) Formula I: (15% egg shell), and (4 ) Formula II: (a combination of 15% eggshell and 5% titanium dioxide). The activity test was carried out by determining (SPF) against UV-B rays in vivo in 4 groups of experimental animals by comparing the Minimum Erythema Dose (MED) value on protected skin with those not protected by sunscreen. The test results were then analyzed based on the category of sunscreen uv protection. The results showed the SPF value of Group 1; 2; 3 and 4 respectively 15.3; 0 ; 8.55 and 12.37. Group 4 has the same activity as group 1 and has better activity than group 3.
{"title":"Uji Aktivitas UV Protektif Secara In Vivo pada Krim dari Bahan Aktif Cangkang Telur Ayam Ras Menggunakan Hewan Coba Kelinci Betina","authors":"Yusnita Usman, Rahmatullah Muin","doi":"10.35799/jm.v11i1.36911","DOIUrl":"https://doi.org/10.35799/jm.v11i1.36911","url":null,"abstract":"Previously, an in vitro study of the SPF value of a cream formulation with active ingredients from broiler eggshells was conducted using UV-vis spectrophotometry at a wavelength of 290-320 nm and obtained an SPF value of 8.335 at a concentration of 9000 ppm. This study aims to continue testing the UV protective activity in vivo on creams from these active ingredients with combination of adding 5% titanium dioxide. The experimental animals used consisted of 12 female rabbits divided into 4 groups, namely (1) positive control: market product spf 15, (2) Negative control: cream base, (3) Formula I: (15% egg shell), and (4 ) Formula II: (a combination of 15% eggshell and 5% titanium dioxide). The activity test was carried out by determining (SPF) against UV-B rays in vivo in 4 groups of experimental animals by comparing the Minimum Erythema Dose (MED) value on protected skin with those not protected by sunscreen. The test results were then analyzed based on the category of sunscreen uv protection. The results showed the SPF value of Group 1; 2; 3 and 4 respectively 15.3; 0 ; 8.55 and 12.37. Group 4 has the same activity as group 1 and has better activity than group 3.","PeriodicalId":53333,"journal":{"name":"Jurnal MIPA","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-01-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83908717","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
F. S. Sagai, D. Pandara, H. Kolibu, S. H. Tongkukut, Ferdy Ferdy, G. Tamuntuan, Gilbert Abidjulu
Telah dilakukan penelitian simulasi untuk menganalisis pengaruh variasi dimensi geometri tungku, daya oven gelombang mikro dan waktu pemanasan terhadap suhu tungku, dan mengoptimasi suhu tungku dalam pemanasan dengan gelombang mikro dari variasi parameter yang digunakan. Tungku kubus dengan panjang sisinya dan tungku silinder dengan diameter dan tingginya masing-masing memiliki ukuran yang sama yaitu 50 mm untuk tipe I, 70 mm untuk tipe II dan 90 mm untuk tipe III, yang terbuat dari material SiC dipanaskan dalam oven gelombang mikro pada daya 100%, 75% dan 50% dari daya maksimum 1,3 kW. Pemanasan tungku ini disimulasikan menggunakan perangkat lunak COMSOL Multiphysics. Hasil simulasi dari setiap parameter dilakukan analisis dan optimasi untuk mencapai suhu optimum 500oC dalam waktu yang singkat dengan konsumsi energinya yang rendah. Hasil simulasi yang diperoleh menunjukkan bahwa variasi parameter memengaruhi suhu yang dihasilkan tungku dan distribusi suhu di dalam tungku. Optimasi pada tungku kubus tipe II (ukuran 70 mm) yang dipanaskan dalam oven gelombang mikro dengan daya 1,3 kW (100%) mencapai suhu optimum 500oC dalam waktu relatif singkat sebesar 7 menit 33 detik (453 detik) dan konsumsi energi relatif rendah sebesar 5,889 × 105 J.Simulation research has been conducted to analyze the effect of variations in the dimensions of the furnace geometry, microwave oven power, and heating time on the furnace temperature, and optimize the furnace temperature in microwave heating from a variety of parameters used. The cube furnace with side length and cylindrical furnace with diameter and height respectively have the same size, namely 50 mm for type I, 70 mm for type II, and 90 mm for type III, which are made of SiC material heated in a microwave oven at power 100%, 75% and 50% of the maximum power of 1,3 kW. The heating of this furnace was simulated using COMSOL Multiphysics software. The simulation results for each parameter are analyzed and optimized to achieve the optimum furnace temperature of 500oC in a short time with low energy consumption. The simulation results obtained show that the parameter variations affect the temperature produced by the furnace and the temperature distribution in the furnace. Optimization of the type II cube furnace (size 70 mm) heated in a microwave oven with a power of 1,3 kW (100%) reaches the optimum temperature of 500oC in a relatively short time of 7 minutes 33 seconds (453 seconds) and relatively low energy consumption of 5,889 × 105 J.
模拟研究已经进行了研究，以分析炉的几何形状变化、微波烤箱的功率和加热温度的时间的影响，并利用使用参数的变化微波优化加热炉的温度。立方体的长一边冷静和炉缸炉直径和高度都有同样大小的,即为I型导弹50毫米至70毫米为III型导弹为II型导弹和90毫米,SiC材料制成的微波加热烤箱里最高能量的50%、75%和100%功率130 kW。这个变暖炉使用多物理COMSOL软件进行模拟。每一项参数的模拟结果都是对其能源消耗较低的时间内达到最佳500摄氏度温度的分析和优化。已获得的模拟结果表明，参数的变化影响炉产生的温度和内部温度的分布。优化在炉子上II型(70毫米)大小的立方体微波加热烤箱里的130 kW(100%)达到了最佳温度500oC相对较短的时间内7分33秒(453万秒)和相对较低的能源消耗5,889×105 J .模拟研究效应》已被conducted to analyze variations in曾录得几何维度》,微波炉功率和加热时间《炉内温度,微波加热的炉热温度已经消失了。立方体的曾录得侧长度正好和cylindrical曾录得直径和高地respectively有一样大小,namely 50毫米为I型,70毫米为II型和III型90毫米的,哪种是SiC材料中的制造at a heated在微波炉功率100%、75%和50% of The maximum power of 1.3 kW。这种炉的加热是利用多元物理软件联合体模拟的。每一参数的结果结果都是分析和优化，以实现500摄氏度的最佳温度结果的模拟显示，温度的变化参数影响着炉和温度在炉内的分布。II型立方体曾录得Optimization》(大小70毫米)和a power of a heated在微波炉130 kW(100%)深处500oC in a relatively之最佳温度短时间的7分钟33秒(453秒)》和5,889 relatively low energy性消费×105 J。
{"title":"Simulasi Optimasi Suhu dari Sistem Pemanasan Temperatur Tinggi Berbasis Gelombang Mikro","authors":"F. S. Sagai, D. Pandara, H. Kolibu, S. H. Tongkukut, Ferdy Ferdy, G. Tamuntuan, Gilbert Abidjulu","doi":"10.35799/jm.v11i1.36151","DOIUrl":"https://doi.org/10.35799/jm.v11i1.36151","url":null,"abstract":"Telah dilakukan penelitian simulasi untuk menganalisis pengaruh variasi dimensi geometri tungku, daya oven gelombang mikro dan waktu pemanasan terhadap suhu tungku, dan mengoptimasi suhu tungku dalam pemanasan dengan gelombang mikro dari variasi parameter yang digunakan. Tungku kubus dengan panjang sisinya dan tungku silinder dengan diameter dan tingginya masing-masing memiliki ukuran yang sama yaitu 50 mm untuk tipe I, 70 mm untuk tipe II dan 90 mm untuk tipe III, yang terbuat dari material SiC dipanaskan dalam oven gelombang mikro pada daya 100%, 75% dan 50% dari daya maksimum 1,3 kW. Pemanasan tungku ini disimulasikan menggunakan perangkat lunak COMSOL Multiphysics. Hasil simulasi dari setiap parameter dilakukan analisis dan optimasi untuk mencapai suhu optimum 500oC dalam waktu yang singkat dengan konsumsi energinya yang rendah. Hasil simulasi yang diperoleh menunjukkan bahwa variasi parameter memengaruhi suhu yang dihasilkan tungku dan distribusi suhu di dalam tungku. Optimasi pada tungku kubus tipe II (ukuran 70 mm) yang dipanaskan dalam oven gelombang mikro dengan daya 1,3 kW (100%) mencapai suhu optimum 500oC dalam waktu relatif singkat sebesar 7 menit 33 detik (453 detik) dan konsumsi energi relatif rendah sebesar 5,889 × 105 J.Simulation research has been conducted to analyze the effect of variations in the dimensions of the furnace geometry, microwave oven power, and heating time on the furnace temperature, and optimize the furnace temperature in microwave heating from a variety of parameters used. The cube furnace with side length and cylindrical furnace with diameter and height respectively have the same size, namely 50 mm for type I, 70 mm for type II, and 90 mm for type III, which are made of SiC material heated in a microwave oven at power 100%, 75% and 50% of the maximum power of 1,3 kW. The heating of this furnace was simulated using COMSOL Multiphysics software. The simulation results for each parameter are analyzed and optimized to achieve the optimum furnace temperature of 500oC in a short time with low energy consumption. The simulation results obtained show that the parameter variations affect the temperature produced by the furnace and the temperature distribution in the furnace. Optimization of the type II cube furnace (size 70 mm) heated in a microwave oven with a power of 1,3 kW (100%) reaches the optimum temperature of 500oC in a relatively short time of 7 minutes 33 seconds (453 seconds) and relatively low energy consumption of 5,889 × 105 J.","PeriodicalId":53333,"journal":{"name":"Jurnal MIPA","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78813827","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
As'ari As'ari, S. H. Tongkukut, V. Suoth, Sarmaria Panjaitan, I. A. Akasi, Meidy Rosalie Pulu
The Manado Fault is a fault located in North Sulawesi which is through the North Minahasa Regency. The fault area is a weak zone that is formed when a crack occurs on the earth's surface, a gap with a certain depth and width is formed, because the natural process of the gap is filled by the surrounding soil material. This weak zone has the potential to become a reservoir for rainwater, which can become a groundwater aquifer. The formation of fractures depends on the geology of an area, fracture characteristics such as the width and depth of the fracture affect the potential for groundwater stored as aquifers. This study aims to identify the influence of geology on the physical parameters of the fault that determine the potential presence of groundwater aquifers in North Minahasa Regency. The faults identified as fractures in Watutumou II Village, Kalawat District and Rap Rap Village, Airmadidi District, North Minahasa Regency are associated with fluids and form groundwater aquifers. The potential for groundwater storage is related to geological conditions following the trend of depth to fracture width with a gradient of -0.0588.
{"title":"Eksplorasi Metode Geolistrik Resistivitas: Studi Kasus Zona Sesar Utama Manado dan Akuifer Air Tanah Di Kabupaten Minahasa Utara","authors":"As'ari As'ari, S. H. Tongkukut, V. Suoth, Sarmaria Panjaitan, I. A. Akasi, Meidy Rosalie Pulu","doi":"10.35799/jm.v11i1.36103","DOIUrl":"https://doi.org/10.35799/jm.v11i1.36103","url":null,"abstract":"The Manado Fault is a fault located in North Sulawesi which is through the North Minahasa Regency. The fault area is a weak zone that is formed when a crack occurs on the earth's surface, a gap with a certain depth and width is formed, because the natural process of the gap is filled by the surrounding soil material. This weak zone has the potential to become a reservoir for rainwater, which can become a groundwater aquifer. The formation of fractures depends on the geology of an area, fracture characteristics such as the width and depth of the fracture affect the potential for groundwater stored as aquifers. This study aims to identify the influence of geology on the physical parameters of the fault that determine the potential presence of groundwater aquifers in North Minahasa Regency. The faults identified as fractures in Watutumou II Village, Kalawat District and Rap Rap Village, Airmadidi District, North Minahasa Regency are associated with fluids and form groundwater aquifers. The potential for groundwater storage is related to geological conditions following the trend of depth to fracture width with a gradient of -0.0588.","PeriodicalId":53333,"journal":{"name":"Jurnal MIPA","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84481332","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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