bluuebunny/crossref_metadata_2025_split huggingface dataset:
Identifikasi Daerah Rawan Longsor Di Sekitar Wilayah Kerja Pertambangan (WKP) Panas Bumi
Authors: Handayani Linda , Singarimbun Alamta 
Published: August 2019

Eksplorasi potensi panas bumi diklaim sebagai tambang ramah lingkungan, artinya tidak terlalu banyak merusak dan membahayakan lingkungan.Sejatinya benar, namun daerah panas bumi selalu berafiliasi dengan topografi yang sangat kasar, lerengnya terjal, dan jarang dijumpai tanah datar yang luas.Hal ini menyebabkan daerah di sekitar panas bumi rawan terhadap tanah longsor.Jenis batuan yang mudah lepas-lepas, membuat tingkat kerawanan terhadap kemungkinan tanah longsor semakin meningkat.Mengingat daerah panas bumi adalah daerah yang rawan terhadap bencana tanah longsor, maka perlu dilakukan pemetaan daerah rawan longsor untuk meminimalkan korban dan kerugian akibat bencana tersebut. Berdasarkan analisis, di sekitar daerah prospek panas bumi, 4,91% adalah daerah yang sangat rawan terhadap bencana longsor, 48,66% masuk dalam kategori rawan longsor, dan hanya 46,43% saja daerah yang tidak rawan terhadap bencana longsor.

Exploration of geothermal claimed as enviromental friendly mining, means that not too destroy and not dangerous for environment. Exactly true, but geothermal prosect always has afiliation with rude topography, steep slope, and hard to find flat area. This is cause area around geothermal prospect prone to landslide. Rock types of that area also easily unravel, this make the level of vulnerability to the possibility of landslides increases. Because of the prone of landslide, so need to do mapping of that area to minimize the loss and victim caused by that disaster. Based on the analysis using probabilistic method frequency ratio, around geothermal prospect, 4,91% is very prone to landslides, 48,66% prone to landslide, and just 46,43%area which safe area.
TOKSISITAS EKSTRAK ETIL ASETAT KULIT BIJI JENGKOL
Authors: Misri Yanti Lubis  , Lamek Marpaung  , Muhammad Pandapotan Nasution  , Partomuan Simanjuntak  
Published: August 2019

Penelitian ini melakukan kajian terhadap toksisitas ekstrak etil asetat dari kuli biji jengkol (Archidendron jiringa) Jack. I. C. Nielsen) dengan menggunakan metode Brine Shrimp Lethality Test (BSLT). Nilai LC50 ekstrak diperoleh dari persamaan regresi linear dari log konsentrasi vs probit % mortalitas. Kulit biji jengkol dikeringkan pada temperature ruang selama 1 x 24 jam dan dimaserasi dengan methanol. Filtrat yang diperoleh diuapkan dengan menggunakan rotary evaporator untuk memperoleh ekstrak pekat methanol. Selanjutnya, ekstrak pekat methanol dilarutkan dalam air dan dipartisi dengan etil asetat, diulangi beberapa kali, dan diuapkan kembali untuk memperoleh ekstrak pekat etil asetat. Uji fitokimia untuk penentuan kandung fenolik dilakukan dengan FeCl3. Uji kandungan fenol dengan FeCl3 menunjukkan hasil positif untuk ekstrak etil asetat. Nilai LC50 untuk ekstrak etil asetat adalah 14.19 ppm. Berdasarkan nilai LC50 ekstrak etil asetat kulit biji jengkol dikategorikan sangat toksik. Toksisitas ekstrak etil asetat dapat diasosiasikan oleh kandungan senyawa fenol dalam ekstrak.

This research studied about toxicity ethyl acetate extract of jiringa (Archidendron jiringa) Jack. I. C. Nielsen) pods by using Brine Shrimp Letality Test (BSLT) method. The LC50 of extract obtained from linear regression equation on chart log concentration vs probit % mortality. Pods of jiringa dried at room temperature 1 x 24 h and then macerated with methanol. Filtrat were evaporated with rotary evapoarator to obtained methanol extract. Further, methanol extract dissolved with water and partitioned with ethyl acetate for several times, and then evaporated to obtained ethyl acetate extract. Test consitution of phenolic compound performed by using FeCl3. Test phenolic compounds with FeCl3 showed positive test for ethyl acetate. The LC50 values of ethyl acetate was 14.19 ppm. Ethyl acetate extract of jiringa (Archidendron jiringa) Jack. I. C. Nielsen) pods showed high toxicity. The high toxicity cause of phenolic compounds constitution. Ethyl acetate extract of jiringa’s pods has high toxicity because it contains phenolic compounds.
Biosorpsi Ion Zink (II) dari Larutan Berair menggunakan Kulit Pisang (Musa paradisiaca) sebagai Low-cost Biosorbent
Authors: Edi Nasra  , Desy Kurniawaty  , Bahrizal  , Reni Puspita Sari  
Published: August 2019

Adsorpsi Zn (II) daril arutan berair menggunakan kulit pisang (Musa paradisiaca) sebagai biosorben telah dikaji dengan menggunakan metode kolom. Proses adsorpsi dikaji terhadap beberapa parameter,seperti pH, konsentrasil arutan Zn (II) mula-mula, massa biosorben, ukuran partikel biosorben dan laju alir. Kondisi optimum proses adsorpsi Zn (II) dengan biosorben kulit pisang berlangsung pada pH 3 dengan konsentrasi larutan Zn (II) mula-mula 500 mg/L, massa biosorben 0,6 g, ukuran partikel biosorben 250 µm dan laju alir 2 mL/min memiliki kapasita sadsorpsi 7,8567 mg/g. Berdasarkan hasil penelitian dapat disimpulkan bahwa kulit pisang, sebagai limbah, memiliki potensi yang baik sebagai biosorben untuk menyerap logam berat, seperti seng (Zn) dari perairan.

The removal of Zn (II) from aqueous solutions using banana (Musa paradisiaca) shell as biosorbent has been studied with column method. The parameters of adsorption such as pH, initial concentration, biosorbent dose, particle size and flow rate were investigated. The optimum condition was at pH=3, concentration 500 mg/l, biosorbent dose 0,6 g, 250 μm particle size and 2 ml/min flow rate with adsorption capacity 7,8567 mg/g. This study concluded that banana shell, a waste material, have good potential as biosorbent to remove toxic metals like zink from water.
Formulasi Masker Gel Peel Off Arang Aktif Dari Cangkang Kelapa Sawit(Eleis Quinemis Jacq) Sebagai Pembersih Wajah Dengan Basis Polivinil Alkohol (Pva)
Authors: Uce Lestari  , Yokhobet Ade Jesika  , Muhaimin  
Published: August 2019

Cangkang kelapa sawit adalah salah satu limbah yang dapat diolah menjadi arang aktif. Arang aktif adalah karbon yang telah diaktivasi sehingga karbon memiliki pori-pori dan area permukaan yang besar guna meningkatkan daya serap kotoran pada wajah sebagai pembersih wajah. Tujuan dari penelitian ini adalah mencari alternative aplikasi limbah cangkang kelapa sawit guna memberikan nilai tambah, arang aktif dapat dimanfaatkan sebagai masker pembersih wajah dalam bentuk gel peel off. Untuk membuat masker gel untuk kulit dapat menggunakan Polyvinyl Alcohol (PVA). PVA digunakan karena dapat membentuk lapisan elastis dan kuat ketika kontakdengankulit dan mudah mongering tanpa perlu adanya bahan aditif. Masker gel peel off arang aktif diuji stabilitas fisiknya. Evaluasi sifat fisik yang dilakukan adalah pemeriksaan organoleptik, pemeriksaan homogenitas, pemeriksaan pH, viskositas dan reologi, uji sebaran, uji waktu kering, uji iritasi, uji kesukaan, dan uji kondisional. Hasil penelitian menunjukkan bahwa formula ke-3 memiliki sifat fisik paling ideal dan lebih disukai oleh panelis. Efektivitas masker PVA-arang aktif diamati dengan menggunakan kamera digital yang menunjukkan struktur permukaan kulit lebih halus dan bersih setelah masker diaplikasikan dibandingkan dengan kulit yang tidak menggunakan masker.

Palm shell is one of the waste that can be processed into activated charcoal. Activated charcoal is a carbon that has been treated by activation so that the compound has pores and a very large surface area in order to increase the absorber power to the dirt on the face as a facial cleanser. The purpose of this research is to look for alternative utilization of waste into activated charcoal that can provide added value so it can be formed into a face cleansing mask in the form of peel off gel. To create gel masks made of skin containing such as Polyvinyl Alcohol (PVA). PVA is used because PVA will form an elastic and strong peel off coating to get in contact with the skin well and easily dry out without the help of other materials. Gel mask exfoliated activated charcoal tested its physical stability. Evaluation of physical properties performed is organoleptic examination, homogeneity examination, pH examination, viscosity and rheology, spreading test, dry time test, favorite test irritation test, and test conditional test. The results showed that the 3rd formula has the most ideal physical properties and preffered more by panelists, which then tested the effectiveness in the dirt net. The effectiveness is using a digital camera shows the structure of skin surfaces are smoother and cleaner after the mask was being applied compare to those skin where no mask applied.
Pemanfaatan Bentonit Teraktivasi Sebagai Penyerap Nitrogen pada Air Limbah Pabrik Kelapa Sawit
Authors: Naswir, M  , Susila Arita  , Desfournatalia  , Widi Hartati  , Lusi Septiarini  
Published: August 2019

Tujuan pada penelitian ini adalah melihat kemampuan bentonit yang sudah diaktivasi menyerap nitrogen yang berasal dari air limbah pabrik kelapa sawit. Sampling bentonit di peroleh dari daerah Sungai rengas Provinsi Jambi. Bentonit dihaluskan dan diaktivasi menggunakan larutan HCl 1,6 M. Pengukuran kandungan nitrogen menggunakan instrumet UVvis. Hasil penelitian menunjukkan bahwa bentonit sudah diaktivasi mempunyai kemampuan yang relatif sama kemampuannya dalam menyerap unsur nitrogen, dengan massa 1 gram dan waktu kontak 90 menit daya setrap bentonit terhadap unsur nitrogen yang berasl dari air limbah

The aim of this research was to evaluate the profile of activated bentonite to adsorb the nitrogen that presence in the palm oil industry wastewater. Bentonite was collected from River Rengas, Jambi Province. Bentonite was milled and activated using 1.6 M solution of HCl. The nitrogen content was measured using UV-Vis. The result showed that during the 90 minutes of contact time, 1.0 gram of the activated bentonite was able to adsorb nitrogen from palm oil industry wastewaterup to 81.50%.
Uji Antioksidan dan Antibakteri Ekstrak Etanol Buah Mengkudu (Morinda citrifolia L.) Terhadap Bakteri Escherichia Coli dan Staphylococcus aureus
Authors: Emma Zaidar Nst  , Rumondang Bulan Nst  , Firman S  , M. Zulham E.S  , Wahyuni NST  
Published: August 2019

Uji antioksidan dan antibakteri dari Ekstrak Etanol Buah Mengkudu telah dilakukan terhadap bakteri Escherichia coli dan Staphylococcus aureus. Serbuk buah mengkudu diekstraksi dengan metode maserasi menggunakan pelarut etanol 70% sehingga menghasilkan ekstrak pekatnya.Dari hasil penelitian uji antioksidan diperoleh IC5033.92 mg/L, maka senyawa tersebut memiliki aktivitas antioksidan yang sangat kuat.Hasil uji antibakteri dari ekstrak etanol buah mengkudu terhadap bakteri Escherichia coli dan Staphylococcus aureus memiliki zona hambat masing masing 12 mm dan 14 mm yang dikategorikan kurang efektif.

Antioxidant test and antibacterial test of Noni Fruit Ethanol Extract. Has been done against Escherichia coli and Staphylococcus aureus bacteria. Noni fruit powder is extracted by maseration method using 70% ethanol solvent to produce concentrated extract. From the results of antioxidant test obtained by IC50 33,92 mg / L, then the compound has a very strong antioxidant activity. Antibacterial test results from the extract of ethanol of noni fruit against Escherichia coli and Staphylococcus aureus bacteria of at concentrations 500 mg / ml, zone of each 12 mm and 14 mm which are categorized as less effective.
Pengembangan Media Berbantukan Komputer Pada Mata Kuliah Ikatan Kimia Untuk Meningkatkan Kompetensi Calon Guru
Authors: Holiwarni Betty , Erviyenni  , Anggraini Dewi , Febrianti Pratiwi 
Published: August 2019

Penelitian ini bertujuan untuk mengembangkan dan mengimplementasikan media berbantukan komputer yang valid, praktis, dan efektif pada mata kuliah ikatan kimia. Metode penelitian yang digunakan adalah penelitian pengembangan (development research). Penelitian dilaksanakan dalam dua tahun dan terdiri dari tiga tahap, yaitu tahap analisis muka belakang, prototipe, dan implementasi. Data penelitian dikumpulkan melalui observasi kelas, wawancara dengan siswa, guru, pakar pendidikan kimia dan media pembelajaran, analisis hasil kerja mahasiswa, dan tes. Hasil penelitian tahun pertama menunjukkan bahwa media berbantukan komputer yang dikembangkan pada mata kuliah ikatan kimia telah memenuhi kriteria valid dari segi isi dan konstruksi. Media juga memenuhi kriteria praktis, yang mana mahasiswa dapat menggunakannya dalam mata kuliah ikatan kimia, tanpa kendala berarti.

This study aims to develop and implement computerized vaids that are practical and effective in chemical bonding courses. The research method used in research development. The study was conducted in two years and consisted of three stages, ie advance analysis phase of prototype dantasi. Research data collected through class observation, interview with student work, and test. First year research result shower that computer-assisted media developed in chemical bonding courses has met the valid criteria of content and construction. The media also meet the practical criteria, which students can use in subject of chemical ties without any significant constraints
Analisis Penguasaan Objek Matematika dalam Penerapan Lesson Study (Kajian Pada 3 Mahasiswa PIPM Angkatan X Semester Ganjil T.A 2017/2018 di Prodi S2 Pendidikan Matematika FKIP Universitas Bengkulu)
Authors: M.Fachruddin.S  
Published: August 2019

Penelitian ini bertujuan untuk mengidentifikasi penguasaan objek langsung dan tidak langsung dalam 2 mata pelajaran matematika kepada 3 siswa yang mengikuti Praktek Inovasi Pembelajaran Matematika (PIPM) Angkatan X Semester Ganjil TA TA 2017/2018 Prodi S2 Pendidikan Matematika Universitas FKIP Universitas Muhammadiyah Malang Bengkulu, dan faktor-faktor yang mempengaruhinya. Sampel penelitian ini adalah 3 siswa yang mengikuti Praktek Inovasi Pembelajaran Matematika (PIPM) bersama Pamong Drs.M.Fachruddin.S, MPd. Hasil penelitian menunjukkan bahwa objek langsung pada 2 mata pelajaran matematika (Teori Bilangan dan Capita Selekta Matematika tingkat Pendidikan Dasar) yang terdiri dari penguasaan konsep, operasi, dan prinsip matematika dikategorikan sangat baik. Demikian pula penguasaan objek tidak langsung dalam dua mata pelajaran matematika (Teori Bilangan dan Kapita Selekta Matematika tingkat Pendidikan Dasar) yang meliputi kemampuan pemecahan masalah dan kemampuan penalaran ke dalam kategori tinggi. Ada tiga faktor yang menyebabkan penguasaan objek matematika, yaitu (1) kualifikasi dan kompetensi guru, (2) kualitas pembelajaran / perkuliahan, dan (3) budaya belajar siswa.

This study aims to identify the direct and indirect object mastery in 2 mathematics courses in the application of lesson study on 3 students who follow the Practice of Mathematics Learning Innovation (PIPM) Force X Odd Semester FY 2017/2018 Prodi S2 Mathematics Education FKIP University of Bengkulu, and the factors that influence it. The sample of this research is 3 students who follow the Practice of Innovation of Mathematics Learning (PIPM) with Pamong Drs.M.Fachruddin.S, MPd. The result of the research shows that the direct object in 2 mathematics subjects (Theory of Numbers and Capita Selekta Matematika level of Basic Education) consisting of mastery of concept, operation, and mathematics principle is categorized very good. Similarly, the mastery of indirect objects in two mathematics courses (Theory of Numbers and Kapita Selekta Matematika level of Basic Education) which includes problem-solving ability and reasoning ability into high category. There are three factors causing the mastery of mathematical objects, namely (1) qualification and competence of teachers, (2) the quality of learning / lectures and (3) student learning culture.
Analisis Kemampuan Literasi Matematis dan Keterampilan Berpikir Tingkat Tinggi Siswa SMP Negeri di Kota Pekanbaru
Authors: Syarifah Nur Siregar  , Titi Solfitri  , Yenita Roza  
Published: August 2019

Penelitian ini bertujuan untuk mengetahui kemampuan literasi matematika dan keterampilan berpikir tingkat tinggi siswa di SMP Negeri Pekanbaru. Instrumen penelitian ini adalah tes matematika yang telah dikembangkan oleh Pendidikan Matematika Realistis Indonesia yang telah diuji di 11 kota di Indonesia (tidak termasuk Pekanbaru). Teknik pengambilan sampel dalam penelitian ini adalah multi-stage sampling. Jumlah siswa yang mengikuti tes adalah 113 orang yang mewakili SMPN 12, SMPN 20, dan SMPN 25. Hasil penelitian menunjukkan bahwa kemampuan literasi matematika siswa masih rendah dan pertanyaan yang diuji yang mengukur kemampuan berpikir tingkat tinggi belum dikuasai. baik oleh siswa belum. Kesimpulan dari penelitian ini adalah kemampuan literasi matematika dan keterampilan berpikir tingkat tinggi siswa di SMP di kota Pekanbaru rendah.

This study aims to determine the mathematical literacy ability and the higher order thinking skill of students at Junior High School in Pekanbaru. The instrument of this study is a mathematics test that has been developed by Indonesian Realistic Mathematics Education which has been tested in 11 cities in Indonesia (excluding Pekanbaru). The sampling technique in this study is multi-stage sampling. The number of students who took the test were 113 people representing SMPN 12, SMPN 20, and SMPN 25. The result showed that the mathematical literacy ability of students is still low and the tested question which measuring the higher order thinking skill has not been mastered well by the students yet. The conclusion of this study is the mathematical literacy ability and the higher order thinking skill of students at Junior High School in Pekanbaru city is low.
Studi Komunitas Nekton Di Kawasan Konservasi Kura-Kura Universitas Bengkulu Dan Pengembangan Pembelajaran Berbasis Lingkungan
Authors: Enersy Desi , Karyadi Bhakti , Winarni Endang Widi 
Published: August 2019

This study aims to inventory the type of necton, knowing the structure of the necton community and measuring the critical thinking skills of students of class VII.1 SMPN 1 Ujan Mas Kepahiang. The results showed that the necton obtained from the Taman Pintar pond amounted to 7 species and Pipi Putih Pond totaling 4 species. The necton species in the Taman Pintar pond with the highest KP, KS, and FK values are tin head fish with KP, KR, and FK values respectively 0.102 idv / m2, 75.71% and 83%. While on the Pipi Putih Pond is local catfish species with the value of KP, KR, FK of 0.01 idv / m2, 39.29% and 25%. Then dominance index (H ') in the Taman Pintar pond is 0.61 and C' Pipi Putih pond = 0.76. While the index of diversity of necton species in both ponds also belonged to very low category with H’ value of Taman Pintar Pond = 0.28 and H' of Pipi Putih pond = 0.17. The result of Percentage Of Agreement test showed that environment-based learning tools developed are included in the category highly feasible to be tested. Students’ critical thinking ability on the perpormance aspect shows 33 ,3 % percentage including critically critical criteria and 66,7 % including critical criteria. While Students’ critical thinking ability on the cognitive aspect shows four criteria, that are very critical as 26 %, crittical criteria 40 %, criteria critical enough 27 % and criteria less 7 %
Hubungan antara Kedalaman Permukaan Air Tanah dengan Salinitas di Pesisir Pantai Kungkai Baru serta Penggunaan Model Discovery Learning
Authors: Sudiro Sutijo Joko , Farid Muchammad , Swistoro Eko 
Published: August 2019

ABSTRACT [Relationship between Groundwater Surface Depth with Salinity at the Coast of New Kungkai Beach and its Implementation on Discovery Learning Model]. The aims of this study were 1) to describe the relationship between groundwater surface depth with salinity in the coastal areas of new kungkai beach of Seluma, and 2) to determine the improvement of learning outcomes (cognitive) of high ability students, moderate and low by using discovery learning model on the concept of static fluid in class X computer and network engineering at SMK Negeri 3 Seluma. This research was a quasi experimental research with one groups pretest-posttest design. The results showed: 1) The relationship between depth with salinity has a value of 0.6478 with a significance level of 0.001 (<0.05); 2) Learning with discovery learning model can improve student learning outcomes on cognitive aspects (knowledge). Increased cognitive results can be seen from the average value of the initial test, the final test and the average value of gain in the class x Tkj is high-ability groups are at high criteria with a value of 0.75 gain in the group is in the criteria medium with the value of gain 0,52 and in the low group were in moderate criteria with a gain value of 0.44. There is a difference in learning outcomes between the high, medium and low groups. The difference is shown by Fcount > Ftable (4.04 > 3.35) with a significance level of 5%. Keywords: Groundwater surface depth; salinity; discovery learning model; SMKN 3 Seluma.
Penerapan Pembelajaran Outdoor dengan Pendekatan Saintifik untuk Meningkatkan Hasil Belajar Siswa SMPN 6 Kota Bengkulu
Authors: Rahyuni Rahyuni , Zamzaili Zamzaili , Ruyani Aceng 
Published: August 2019

[Implementation of outdoor learning with saintific approach to improve student learning of SMPN 6 Bengkulu City]. The aims of this study was to know the results of scientific learning (outdoor) and see the comparison the value of students’s group who learn by using outdoor learning and groups of students who do not use outdoor learning. The subject of this research is the students of class VII SMPN6 Bengkulu City on academic year 2016/2017. The sample who taken are class VII G class control class VII H, experimental class, class VII E as a testing class. Sampling technique by purposive sampling. Instrument used double choice test instrument 25 problem,. The technique of data analysis using statistic Anova Mix (mixed Anova). Test normality by using test of covariance matrix. The average value of pretest of the experimental class students 62.1 after the average treatment of student postes increased to 86.25 which means an increase of 24.15. The control class Pretest and postes results Average score of pretest students 65,9 after conventional learning average student postes score increased to 75,5 which means an increase of 9.6. Student learning outcomes using outdoor learning method is higher than those not using the method, it is seen from the average experimental class value (80,75) bigger than control class (64,00) with increase of 26,37%. Keywords: Outdoor learning; saintific approach; student learning outcomes.