bluuebunny/crossref_metadata_2025_split huggingface dataset:
PENGARUH MODEL PEMBELAJARAN COOPERATIVE LEARNING TIPE PAIR CHECKS DIPADUKAN DENGAN EKSPERIMEN TERHADAP MOTIVASI DAN HASIL BELAJAR KIMIA SISWA KELAS X MADRASAH ALIYAH AL-ISHAHUL ITTIHAD.
Authors: Raehanah Raehanah , Taufiq Lukman , Hadi Samsul 
Published: July 2020

Tujuan penelitian ini adalah untuk mengetahui pengaruh penggunaan model pembelajaran cooperative learning tipe pair checks dipadukan dengan eksperimen terhadap motivasi dan hasil belajar. Jenis penelitian ini adalah penelitian kuantitatif dengan menggunakan pendekatan quasi eksperimen dan dilaksanakan dari bulan Februari – Maret 2019. Populasi penelitian ini adalah semua siswa kelas X IPA MA Al-Ishlahul Ittihad Jabon Tentan Tahun Ajaran 2018/2019. Sampel diperoleh dengan tehnik sampel random sampling. Kelas A dijadikan sebagai kelas eksperimen yang diajarkan dengan model pembelajaran cooperative, sedangkan kelas B dijadikan sebagai kelas kontrol yang diajarkan dengan model pembelajaran konvensional. Data diperoleh dengan metode angket untuk motivasi belajar dan tes untuk hasil belajar. Hipotesis diuji menggunakan Kruskall Wallis dan Mann Whitney Test. Dari hasil analisis data disimpulkan: 1) Nilai sig 0,001 < 0,005 artinya ada pengaruh penggunaan model pembelajaran cooperative learning tipe pair checks dipadukan dengan eksperimen terhadap motivasi dan hasil belajar secara multivariate, 2) nilai sig 0,039 < 0,05 artinya ada pengaruh penggunaan model pembelajaran cooperative learning tipe pair checks dipadukan dengan eksperimen terhadap motivasi belajar, 3) nilai sig 0,000 < 0,005 artinya ada pengaruh penggunaan model pembelajaran cooperative learning tipe pair checks dipadukan dengan eksperimen terhadap hasil belajar.
Extraction Cellulose From Rice Husk
Authors: Yunus Muhammad Arham 
Published: July 2020

Abstract. Cellulose from rice husk has been successfully synthesized. Rice husk is an abundant agricultural waste and has a high cellulose content. Bioconversion of rice husk into cellulose begins with the stages of delignification and bleaching. The resulting cellulose was characterized using FTIR and XRD. The IR spectra show a strong absorption peak at 3444.87 cm− 1 which is associated with stretching vibrations O − H (hydrogen bonds between molecules), absorption peaks at 1033.85 cm− 1 are identified as stretching C − O − C which is β bond −1,4 glycosidic from cellulose. XRD shows the particle size of cellulose which is 3.44 nm and has crystallinity of 58.73%. These results indicate that cellulose from rice husk has good characteristics. Keywords: Rice Husk, Cellulose, FTIR, XRD
Synthesis Of Glycerol Carbonate From Glycerol And Urea Using Limestone As Catalyst Source
Authors: Megawati Megawati 
Published: July 2020

Synthesis of Glycerol carbonate from glycerol and urea using limestone as a catalyst has been conducted. This study aims to make glycerol carbonate from glycerol and urea by utilizing scattered natural limestone widespread in Southeast Sulawesi as a catalyst source. The catalyst was obtained from the calcination of natural limestone to decompose CaCO3 to CaO. This condition added to glycerol and urea to test the catalyst activity. Synthesis of glycerol carbonate was carried out through the carbamoylation reaction of glycerol with urea. The advantage of this method is the reaction carried out with free solvents and running in ambient pressure (1 atm). The stages of catalyst testing in the reaction of glycerol carbonate formation were carried out by reacting glycerol, urea, and calcined limestone with 1: 1 substrate mole ratio with a catalyst concentration of 5% mass over glycerol. Characterization used was Fourier Transform Infrared Spectroscopy (FTIR) and supported by Gas Chromatography (GC) data. Optimization catalysis reaction was obtained at a temperature of 140oC for 4 hours and using a catalyst mole ratio to 5% substrate
Impact of Cyclone on Livelihood Pattern in the South Western Coastal Region of Bangladesh: Pirojpur
Authors: Nasrin Dilara , Latif Mahmuda Binte , Mamun Shamim Al , Arif Reyad Hossain , Muliadi Muliadi 
Published: July 2020

This research was carried out to assess the impact of cyclone on livelihood pattern in Pirojpur district, Bangladesh during January to June, 2017. The study was both qualitative and quantitative type. The primary data were collected using randomly sampling method (42+42+42=126 respondents) from Tushkhali, Bhitabaria and Pattashi villages of Pirojpur district. The secondary data were collected from different journals, articles, books, official documents, thesis papers and also daily newspapers etc. From the study it was observed that monthly income of middle (4001-8000 tk) and high (8001-above tk) income groups ware decreased by 5% and 0.92% respectively while low income people (1-4000 tk) was increased due to decrease of production after Sidr. On the other hand, expenditure ability of low and middle income groups was decreased. Sidr has created a great impact on human health, livestock, fisheries, food habit, crop production and occupation pattern of the affected people. Respondent’s houses were damaged partially (66.78%), 33.22% completely and cultivated land 28.57 % completely by Sidr in study area. Respondents of the study area said that the production of rice (8%), chili (12%), and vegetables (11%) were reduced due to saline water entrance into the crop field after Sidr. Affected people were migrated (temporary 23.10%, local 25% and internal 26.10%) from Pirojpur to Dhaka (53%), Pirojpur to other places (47%) on the post Sidr due to loss of houses, shelters, cultivated land and lack of job opportunity. Among all factors of temporary migration, water logging was the first reason of migrating people of the study area.
Synthesis of a Cinnamic Acid Derivative and Bioactivity as an Anticancer Based on Result Quantitative Structure Activity Relationship (QSAR) Analysis
Authors: Fattah Abdul 
Published: July 2020

Synthesis of compound (E)-4-(3-oxo-3-(phenethylamino)prop-1-en-1-il)-1,2-phenylene diacetate (3) analogue (E)-3-(3,4-dihydroxyphenyl)-N-phenethylacrylamide as a recommendation from the QSAR analysis was carried out. The synthesis of these compounds uses the starting material of caffeic acid through the stages of the reaction of acetylation, chlorination, and amidation. Acetylation was carried out using acetic anhydride in pyridine at room temperature for 4 hours. Chlorination was carried out using thionyl chloride reagent in dimethylphromamide solvent under reflux conditions at 80ºC for 4 hours, followed by amidation using phenethylamine in dichloromethane solvent at room temperature for 1 hour. The structure of each phase of the reaction product is identified using FT-IR spectroscopy. Acetylation produces white crystalline solids with melting point 182-184oC, and amidation produces compound 3 in the form of white crystals with melting point 170-173oC. The results of activity tests on murine leukaemia P-388 cells showed that the activity of compound 3 was classified as very strong (IC50 = 0,5 µg /mL) so that it was potentially used as an anticancer drug.
ANALISIS KELAYAKAN AGROWISATA (Studi Kasus pada Ghitari Coffee Plantation di Lembang Kaero Kecamatan Sangalla’ Kabupaten Tana Toraja, Provinsi Sulawesi Selatan)
Authors: Siama Astuti , Lanuhu Nurdin , Diansari Pipi , Rukmana Didi , Saadah Saadah 
Published: July 2020

AbstractThe development of coffee plantation land has become an important tourism area in the preservation of agricultural land resources. This study aims to analyze the feasibility of developing agro-tourism in the Ghitari Coffee Plantation in terms of three aspects, namely the biophysical, economic and socio-culture aspects, where if the three aspects are fulfilled then the business is considered feasible to be carried out. This research was carried out at the Ghitari Coffee Plantation, located in Lembang Kaero, Sangalla’ District, Tana Toraja, South Sulawesi. The analytical method used is qualitative and quantitative analysis, where the qualitative analysis is used to analyze the feasibility of biophysical and socio-cultural aspects, while the quantitative analysis is used to analyze economic aspects using the NPV and IRR methods. The results showed that the aspect studied, both from the biophysical, economic and socio-cultural aspect were fulfilled. Based on the results of the calculation of IRR and NPV, the result of PV of Proceeds is Rp. 789,992,946 and PV of Outlays of Rp. 620,000,000, so the NPV value is positive, in the amount of Rp. 169,992,946. While the IRR calculation result is 27%, so it is considered feasible because the IRR value is greater than the interest rate.Keywords: Business Feasibility Analysis, Coffee Plantation, Agro Tourism.
Pengaruh pembelajaran IPA berbasis discovery learning terintegrasi jajanan lokal daerah terhadap keterampilan proses sains
Authors: Tyas Rizki Arumning , Wilujeng Insih , Suyanta Suyanta 
Published: July 2020

Penelitian ini bertujuan untuk mengetahui pengaruh pembelajaran IPA berbasis discovery learning terintegrasi jajanan lokal daerah terhadap keterampilan proses sains. Penelitian ini merupakan penelitian deskriptif dengan pendekatan kuantitatif. Populasi pada penelitian ini adalah peserta didik kelas VIII SMP N1 Cangkringan. Sampel dalam penelitian ini berjumlah 32 peserta didik yang berasal dari satu kelas, yakni kelas VIII A. Perangkat pembelajaran yang digunakan dalam penelitian ini adalah: (1) Silabus, (2) Rencana Pelaksanaan Pembelajaran (RPP), dan (3) Lembar Kegiatan Peserta Didik. Adapun instrumen penelitian yang digunakan dalam penelitian ini adalah lembar observasi keterampilan proses. Aspek yang dianalisis meliputi aspek keterampilan proses sains dasar dan terintergrasi. Setelah diperoleh rata – rata skor pada tiap aspek, rata – rata skor yang diperoleh kemudian diklasifikasikan menurut kategori sangat baik, baik, kurang, dan sangat kurang. Berdasarkan hasil penelitian, model pembelajaran IPA berbasis discovery learning terintegrasi jajanan lokal daerah efektif meningkatkan lima aspek keterampilan proses sains dasar, yaitu keterampilan mengobservasi, mengklasifikasi, memprediksi, menarik kesimpulan, dan mengkomunikasikan, serta lima aspek keterampilan proses sains terintegrasi, yaitu menginterpretasi data, mengontrol variabel, membuat hipotesis, mendefinisikan secara operasional, serta melakukan eksperimen. Science learning based on discovery integrated regional local snacks on student science process skills AbstractThis study aimed to determine the effect of science learning based on discovery learning that was integrated with regional local snacks on student science process skills. This research was a descriptive study with a quantitative approach. The population in this research were students of class VIII SMP N1 Cangkringan. The sample in this research was 32 students from one class, namely class VIII A. The learning tools used in this study were: (1) Syllabus, (2) Lesson Plan, and (3) Student Worksheet. The research instrument used in this research was the student science process skills observation sheet. The aspects analyzed include aspects of basic and integrated science process skills. After obtaining an average score in each aspect, the average score obtained is then classified according to the category of very good, good, low, and very low. The result shows that discovery learning integrated with regional local snacks is effective in improving five aspects of basic science process skills, namely observing, classifying, predicting, drawing conclusions, and communicating, as well as five aspects of integrated science process skills, namely interpreting data, controlling variables, make hypotheses, define operationally, and conduct experiments.
KEPEMIMPINAN SEKOLAH : Efektivitas dan efisiensi dalam Peningkatan Guru
Authors: Tono Sap 
Published: July 2020

Penekanan yang berkembang pada kepemimpinan guru telah diakui dalam literatur ilmiah serta standar pengajaran profesional. untuk mendapatkan guru yang dapat membantu tugas kepemimpinan secara optimal, diperlukan pemimpin yang mampu mengarahkan dan menyesuaikan perilaku bawahan untuk mencapai tujuan organisasi secara maksimal. Penelitian ini adalah kualitatif. Perilaku kepemimpinan guru dikelompokkan berdasarkan jenis (formal / informal) dan pengaturan (ruang kelas / sekolah / profesi). Penelitian ini menggunakan pendekatan etnografi. Tempat pelaksanaan penelitian ini adalah Sekolah di Kabupaten Sragen. Diwawancarai dalam penelitian ini termasuk kepala sekolah dan guru Sekolah di Kabupaten Sragen. Mengumpulkan data menggunakan observasi, wawancara dan dokumentasi. Validitas data diuji dengan menggunakan triangulasi. Analisis menggunakan reduksi data, penarikan kesimpulan dan verifikasi data dan gambar. Perilaku kepemimpinan guru yang paling jarang dilaporkan adalah kepemimpinan formal di sekolah dan dalam profesi. kepala sekolah di Kabuoaten Sragen dalam upaya meningkatkan partisipasi angkatan kerja dengan menggunakan gaya kepemimpinan yang demokratis, diskresioner, karismatik, partisipatif dan terkadang militeristik, dapat ditentukan strategi yang dilakukan. Ketika sekolah terus berkembang sebagai organisasi di mana kepemimpinan didistribusikan di antara semua pendidik, memahami perilaku kepemimpinan guru dalam berbagai pengaturan dapat membantu para pemimpin sekolah formal dan informal untuk secara kolaboratif dan lebih efektif memimpin
PENINGKATAN MOTIVASI DAN HASIL BELAJAR SISWA TENTANG PESAWAT SEDERHANA DENGAN METODE DEMONSTRASI
Authors: - Bagus Sinung 
Published: July 2020

Tujuan penelitian ini adalah untuk meningkatkan motivasi dan hasil belajar siswa kelas VIII B SMP Negeri 3 Teras Tahun Pelajaran 2019/2020 pada materi Pesawat Sederhana. Penelitian Tindakan Kelas ini menggunakan dua siklus, setiap siklusnya terdiri atas perencanaan, tindakan, pengamatan, dan refleksi. Metode pengumpulan data yang digunakan adalah dokumentasi, observasi, dan tes tertulis. Untuk memperoleh data dan kejadian selama Tindakan Kelas yang dilakukan maka segala catatan kegiatan dan observasi yang dilakukan dikumpulkan dan diadministrasikan untuk kegiatan pelaporan. Berdasarkan analisis data, perbandingan prestasi belajar siswa pada pra siklus dan siklus I meningkat. Untuk nilai terendah meningkat dari 36 menjadi 48 atau meningkat sebesar 25%. Dan nilai rerata meningkat cukup baik yaitu dari 58 menjadi 62 atau meningkat sebesar 5,88%. Nilai tertinggi yang diperoleh siswa pada pra siklus 86 meningkat menjadi 98 atau meningkat sebesar 4,65%. pada kondisi awal, nilai tertinggi yang diperoleh siswa adalah 86 berjumlah 2 anak, sedang pada siklus II (kondisi akhir) nilai tertinggi yang diperoleh siswa 100 berjumlah 3 anak. Nilai terendah pada kondisi awal sebesar 36 dan pada siklus II (kondisi akhir) sebesar 61 yang juga meningkat sebesar 45,8 %. Nilai rata-rata kelas meningkat signifikan dari 48 pada kondisi awal menjadi 68 pada siklus II (kondisi akhir) yaitu sebesar 14,7 %. Hal ini sudah memenuhi harapan untuk mencapai batas KKM (Kriteris Ketuntasan Minimal) sebesar 65. Berdasar analisis di atas, dapat disimpulkan bahwa penggunaan metode demonstrasi dapat meningkatkan motivasi dan hasil belajar siswa kelas VIII B SMP Negeri 3 Teras Tahun Pelajaran 2019/2020 pada materi Pesawat Sederhana.
Study The Corrosion Behavior of Carbon Steel in Presence Of CO2 Gas in Oil Pipe Lines
Authors: T. Remedhan Shurooq 
Published: July 2020

The current work is the study of corrosion behaveior of carbon steel, in naturally aerated (3.5%wt NaCl) solution. A rotating cylinder electrode (RCE) system was used to produce conditions of turbulent flow, polarization experiments were conducted at various temperature and various rotating speed at each temperature.Similar experiments were carried out using CO2 gas at (32 ml/sec) flow rate.Corresponding experiments by weight loss were carried out in (3.5%wt NaCl) solution with Kerosene + 10% V salt solution and Gas oil + 10% V salt solution at 328k and (0, 400) r.p.m .Similar experiments were carried out in kerosene + 10% V salt solution at (298, 308 and 318)K and rotating speed (0) r.p.m at each temperature.Other experiments were carried out in pure kerosene at temperature (298 and 318)K and speed (0) r.p.m. All experiments were carried out with and with out CO2 gas .The results indicate that the corrosion rate of carbon steel is increasing70% with CO2 gas
Trigeminal neuralgia associated with isotretinoin use: a very rare complication
Authors: Guntel Murat 
Published: July 2020

Background:
Trigeminal neuralgia (TN) is a term used in short-term acute pain in the trigeminal nerve distribution that feels like stabbing or electric shock. Isotretinoin (13-cis-retinoic acid) is a commonly used medication for the treatment of severe cystic acne that does not respond to other therapies. Isotretinoin treatment has been associated with rare but serious complications on multiple systems.

Case Presentation:
This case report presents a patient who developed TN while using oral isotretinoin therapy for acne vulgaris. This rare adverse event has not been well documented in the medical literature.

Conclusion:
The author want to emphasize with this case report that physicians should keep in mind that TN is one of the possible negative effects of isotretinoin.
Respon Beberapa Varietas Padi Terhadap Serangan Fusarium fujikuroi Penyebab Penyakit Bakanae
Authors: Darnetty Darnetty , Sulyanti Eri 
Published: July 2020

Fusarium fujikuroi is the cause of bakanae disease in rice plants. Level of bakanae disease attack on some rice cultivation land in West Sumatra, especially in Padang Pariaman district is quite high. One effort to suppress the development of F. fujikuroi is by planting resistant varieties. In this study, 15 rice varieties originating Sumatera Barat were used to be tested for their response to F. fujikuroi attack. The purpose of this study was to obtain the varieties with the low attack rate of F. fujikuroi. Parameters observed were number of dead seeds, number of dead seedlings, number of stunted seedlings, number of seeds showing symptoms of Bakanae and total infected seeds. The results of the study indicated that symptoms of F. fujikuroi attack varied which were dead seeds, stunting seedlings, dead seedslings and bakanae. The response of rice varieties to F. fujikuroi attack was different with characterized by different levels of infection rates. Low infection rates were found in Pessel varieties (2.0%), Batang sahalai (15.5%), Cisokan (17.0%), and Batang Lembang (20%). Other varieties showed a high percentage of F. fujikuroi attacks ranging from 20% to 54.5%.
Uji Beberapa Dosis Tepung Daun Gamal (Gliricididia sepium Jacq.) Terhadap Sitophilus oryzae L. Pada Beras Di Penyimpanan
Authors: Rustam Rusli , Sutikno Agus , Laila Jamiatul 
Published: July 2020

Rice is one of serealea comodity that susceptible with pest storage. One of the pest that often attack the rice in storage is Sitophilus oryzae L. The alternative for control S. oryzae L. as fumigant which enviromentally sound is Gliricidia sepium Jacq. as organic insecticide. This research aims to get the best dose G. sepium Jacq. leaf powder to control S. oryzae L. pest in rice storage. This research conducted at Laboratory of Plant Pest, Faculty of Agriculture, University of Riau, Pekan baru from Mei until Juni 2016. This research arranged experimentally by using Completely Randomized Design consisting of 5 treatments and 4 replications. The treatment consist of 5 dose levels were 0 g/100 g rice, 2 g/100 g rice, 4 g/100 g rice, 6 g/100 g rice and 8 g/100 g rice. The result showed that giving of G. sepium Jacq. leaf powder with dose 8 g/100 g rice causes time of death beginningS. oryzae L. during 31.50 hours after application, lethal time 50 during 282.8 hours after application, total mortality was 70%, amount of generation was 9,75 beetles and decrease of seed weight’s rice was 1.08%.
Aktivitas Air Rebusan Beberapa Kulit Jeruk (Citrus spp) untuk Menekan Pertumbuhan Colletotrichum gloeosporioides pada Tanaman Buah Naga secara In Vitro
Authors: Sulyanti Eri , Yaherwandi Yaherwandi , Ulindari Restu Monika 
Published: July 2020

Penelitian bertujuan untuk mendapatkan air rebusan kulit jeruk yang efektif dalam menekan pertumbuhan patogen Colletotrichum gloeosporioides penz. & Sacc. penyebab penyakit antraknosa pada tanaman buah naga (Hycoleceurus polyrhizus, L.) secara in vitro. Hasil penelitian diharapkan dapat membantu petani dalam mengendalikan penyakit antraknosa pada tanaman buah naga, serta mampu mempertahankan kualitas dan kuantitas dalam memproduksi buah naga. Penelitian ini dilaksanakan di laboratorium Fitopatologi Fakultas Pertanian Universitas Andalas dengan Rancangan Acak Lengkap, 6 perlakuan dan 5 ulangan. Perlakuannya adalah air rebusan dari beberapa kulit jenis jeruk dengan konsentrasi 5 g/100 ml, diantaranya: A = Tanpa perlakuan (kontrol); B = Kulit jeruk purut (Citrus histrix DC); C = Kulit jeruk manis (Citrus sinensis L.); D = Kulit jeruk nipis (Citrus aurantifolia); E = Kulit jeruk kasturi(Citrus madurensis Lour.) ; F = Pestisida berbahan aktif (tebukonazol, dengan dosis anjuran 2 g/100 ml, sebagai pembanding). Data yang diperoleh dianalisis secara sidik ragam (uji F) dan jika berbeda nyata dilanjutkan dengan (Least Significance Different) LSD pada taraf nyata 5%. Hasil penelitian menunjukkan bahwa dari perlakuan beberapa kulit jeruk dapat menekan pertumbuhan jamur C. gloeosporioides in vitro. Perlakuan air rebusan kulit jeruk manis adalah yang paling baik dengan efektivitas penekanan: luas koloni 76,86%, jumlah konidia 94,58%, dan daya perkecambahan konidia 38,18%. Namun efektivitasnya masih rendah jika dibandingkan dengan penggunaan pestisida berbahan aktif tebukonazol lebih efektif 100%.
Fulminant presentation of a SMARCB1-deficient, anterior cranial fossa tumor in adult
Authors: Levitan Idan , Fichman Suzana , Laviv Yosef 
Published: July 2020

Background:
Malignant atypical teratoid rhabdoid tumor (ATRT) usually develops in children. ATRTs are rare in adults, with only one case in the literature describing involvement of the anterior skull base. These primary intracranial tumors are characterized molecularly as SMARCB1 (INI1) deficient. Different types of such SMARCB1-deficient tumors exist in adulthood, usually in the form of extracranial tumors. Very few cases of such a new entity, named SMARCB1-deficient sinonasal carcinoma have been described with intracranial penetration and involvement of the anterior cranial fossa.

Case Description:
A 36-year-old male presented with acute cognitive deterioration. Over few hours, he developed a fulminant herniation syndrome. Imaging showed a tumor in the anterior cranial fossa surrounded by massive brain edema. The tumor has destroyed the frontal bone with involvement of the nasal cavities and paranasal sinuses. The patient underwent emergent decompressive craniectomy and tumor debulking but could not be saved. Pathological analysis revealed a highly cellular tumor without rhabdoid cells but with areas of necrosis. Further immunohistochemical stains revealed that neoplastic cells were diffusely and strongly positive for epithelial membrane antigen and P63 and negative for SMARCB1 (i.e., loss of expression), confirming the diagnosis of sinonasal carcinoma.

Conclusion:
To the best of our knowledge, this is the first report of a fulminant presentation of a SMARCB1- deficient tumor in young adult, involving the anterior cranial fossa and the paranasal sinuses. The main differential diagnosis of aggressive, primary, intracranial SMARCB1-deficient tumors in adults includes ATRT, SMARCB1- deficient sinonasal carcinoma, rhabdoid meningioma, and rhabdoid glioblastoma. Atypical tumors involving the anterior skull base without a clear histopathological pattern should therefore be checked for SMARCB1 expression.