Claim Missing Document
Check
Articles

Found 14 Documents
Search

PENINGKATKAN HASIL BELAJAR MATEMATIKA SISWA KELAS XII IPS MELALUI METODE LATIHAN BERSTRUKTUR DI SMA NEGERI 1 MERBAU NURHAYATI '
Jurnal Pendidikan Vol 7, No 2 (2016)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (39.139 KB) | DOI: 10.31258/jp.7.2.131-139

Abstract

Tujuan Penelitian ini adalah untuk meningkatkan hasil belajar Matematika siswa kelas XIIIPS2 SMAN 1 Merbau - Kepulauan Meranti. Sampel penelitian ini terdiri, 34 orang siswa kelas XIIIPS.Penelitian ini adalah penelitian tindakan kelas dengan menerapkan metode latihan berstruktur.Hasilpenelitian ini menunjukan nilai rata-rata hasil belajar siswa 53,1 % meningkat menjadi 65,7% pada siklusI, berarti terjadi peningkatan rata-rata hasil belajar sebesar 12,6 %. Dan pada siklus II meningkat menjadi65,7% menjadi 85,6 % berarti terjadi peningkatan rata-rata hasil sebesar belajar 20,1%.Hasil penelitianini memperlihatkan bahwa hasil yang telah dicapai siswa melebihi kriteria yang ditentukan. Dengan demikianmetode latihan berstrukturdapat meningkatkan prestasi siswa dalam pelajaran matematika.
SINTESIS BIODISEL MENGGUNAKAN KATALIS CaO CANGKANG KERANG DARAH: OPTIMALISASI TEMPERATUR REAKSI DAN KALSINASI KATALIS Zaidi Asyadiqi; Nurhayati '; Muhdarina '
Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Vol 1, No 2 (2014): Wisuda Oktober 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Blood cockle shells (Anadara granosa) can be used as heterogeneous catalysts for biodiesel production because it contains CaCO 3 that can be decomposed into CaO. In this study, blood cockle shells was calcined at temperatures of 800, 900 and 1000 oC for 10 hours. The synthesis of biodiesel was done by transesterification process of cooking oil and methanol. The condition variables for biodiesel synthesis studied were reaction temperatures (55, 60, 65 and 70 °C) and catalyst calcination temperatures (800, 900 and 1000 °C). The optimum of biodiesel results was 71.58 % with catalyst weight conditions of 4 % (w/w), the mole ratio of oil- methanol 1: 6, reaction temperature at 60±2 oC for 3 hours using catalyst calcination at 900 o C for 10 hours. Biodiesel obtained has a water content of 0.031 %, density of 870 kg/m 3 , viscosity of 3.63 mm 2 /s, flash point of 150 oC, carbon residue of 0.029 %, acid number of 0.23 mg KOH/g, iodine number of 50.26 g-I 2 /100 g and cetane number of 67.9. All of the characteristics of biodiesel correspond to the SNI for biodiesel (SNI 04-7182-2006).
LEMPUNG CENGAR TERAKTIVASI ASAM SULFAT SEBAGAI HASIL SAMPING PRODUKSI KOAGULAN: KARAKTERISASI Fiola Reviola; Muhdarina '; Nurhayati '
Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Vol 2, No 1 (2015): Wisuda Februari 2015
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Cengar Natural clay was calcined at 700°C for 3 hours and the clay was extracted usingsulfuric acid with various of concentration (0.2, 0.4 and 0.6 moles) at 30 o C for 1 hour for liquid coagulant synthesis. The by product of liquid coagulant production was the sulfuric acid activated Cengar clay which have been used in this study. The sulfuric acid activated Cengar clay solids was heated at 230°C for 5 hours. The activated Cengar clay were characterized to determine the mineral types and ratio Si/Al. Characterization by X-ray diffraction (XRD) has shown a mineral of bassanite in clay at every moles of sulfuric acid, where as the types of clay mineral that only calcined at 700oC for 3 hours (LC700) were kaolinite, muscovite, monmorilonite, calcite and quartz. Ratio Si/Al in each of the sulfuric acid activated clays LC700-0,2, LC700-0,4 and LC700-0,6 were 7,76, 10,75 and 23,76, while non activated clay LC700 was 6,08. It is concluded that the activated clay was potential to be used as an adsorbent.
PRODUKSI BIODIESEL DARI CPO DENGAN PROSES ESTERIFIKASI DENGAN KATALIS H2SO4 DAN TRANSESTERIFIKASI DENGAN KATALIS CaO DARI CANGKANG KERANG DARAH Tengku Ryhaan Permata Sari Devi; Nurhayati '; Amilia Linggawati
Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Vol 2, No 1 (2015): Wisuda Februari 2015
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Biodiesel is one of alternative fuel to replace diesel that was derived from petroleum. The objective of this research is to optimize biodiesel production from CPO raw material through esterification reaction catalyzed with H2SO4 and transesterification catalyzed with CaO originally from blood cockle. The esterification reaction was carried out with the weight variation of the catalyst and mol ratio of oil to methanol. Before performing biodiesel synthesis the water content and free fatty acid (FFA) were determined. Water content obtained was 0,4% and FFA was 5,0187%. The maximum biodiesel produced was 77,93% that was obtained from reaction by 2%wt H2SO4 catalyst with mol ratio of oil to methanol 1:24.
VARIASI BERAT KATALIS DAN SUHU REAKSI TRANSESTERIFIKASI CRUDE PALM OIL MENGGUNAKAN KATALIS CANGKANG KERANG DARAH KALSINASI 800 OC Muhammad Reza Pahlevi; Nurhayati '; Sofia Anita
Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Vol 2, No 1 (2015): Wisuda Februari 2015
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

"> Biodiesel is one of the alternative fuels derived from petroleum. Compared to diesel fuel, it is renewable, biodegradable, and environmentally friendly. Biodiesel can be synthesized in two steps, that are esterification and transesterification stages. In this study, biodisel was synthesized from CPO through esterification using concentrated H2SO4 as catalyst, and transesterification using CaO catalyst from Anadara granosa shell waste. This catalyst was calcined at 800 oC for 10 hours. The surface area measurement of CaO catalyst derived blood clam shell was using methylene blue adsorption method and was obtained 17.3742 m2/g. The biodisel was synthesised with various of catalyst weight and reaction temperature. The result of biodiesel was obtained 76.40% with 4% CaO catalyst weight for 3 hours at ratio mol oil methanol 1:12 and reaction temperature at 65±2 °C.
ADSORPSI KATION Pb (II) PADA LEMPUNG CENGAR TERAKTIVASI ASAM SULFAT : PENGARUH WAKTU KONTAK Rama Anggun Sari; Muhdarina '; Nurhayati '
Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Vol 1, No 2 (2014): Wisuda Oktober 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The adsorption ability of activated sulfuric acid Cengar clays (LC0.2, LC0.4 and LC0.6) has been studied using cation of Pb (II) in aqueous solution. The adsorption experiments were observed at each contact time i.e 5, 15, 30, 60, 70, 80, 90 and 120 minutes. All of the experiments were done at a temperature of 30°C and initial concentration of 20 ppm. The amount of Pb (II) adsorbed by the adsorbents was measured by Atomic Absorption Spectrophotometer (AAS). All data was then applied into kinetic models of the pseudofirst order, pseudo-second order and Elovich to determine the adsorption behavior. We found that 0.759, 0.799 and 0.827 mg g-1 Pb were adsorbed by LC0.2, LC0.4 and LC0.6 at 90 minutes contact time, respectively. All of the activated sulfuric acid Cengar clays which adsorbed Pb (II) cations according to pseudo second-order kinetics with  k values (g mg -1 min -1 ) of each adsorbent were 0.156, 0.228 and 0.311, respectively. Fulfillment of the pseudo second-order models has indicated that the process occured was chemicaladsorption.
BIOARANG LIMBAH DAUN KETAPANG (Terminalia catappa L.) SEBAGAI ADSORBEN ZAT WARNA METILEN BIRU DALAM LARUTAN BERAIR Asnifa Yully; Muhdarina '; Nurhayati '
Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Vol 2, No 1 (2015): Wisuda Februari 2015
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Terminalia catappa leaves waste is a biomass waste that can be found around campus of Riau University. After carbonization at various time at temperature of 300 ˚C, biocharcoal of Terminalia catappa leaves waste was used for the adsorption of methylene blue from aqueous solution. Parameters of contact time and concentration of the adsorbate were varied in order to determine the adsorption capacity. Water and ash content of biocharcoal of Terminalia catappa leaves waste were also identified. The results showed that the adsorption methylene blue each of biocharcoal was 4,3478; 6,0024 and 5,1281 mg/g at the carbonization time 30, 60 and 120 minutes respectively, with the initial concentration of 40 ppm and the adsorption time is 15 minutes. Water content of biocharcoal of Terminalia catappa leaves with carbonization time of 30 minutes, 60 minutes and 120 minutes was 2,74%; 2,84% and 1 ,67% respectively, while the ash content was 14%; 13% and 15% respectively.
PRODUKSI BIODISEL DARI MINYAK GORENG BEKAS MENGGUNAKAN KATALIS CaO CANGKANG KERANG DARAH KALSINASI 900 °C Rini Setiowati; Nurhayati '; Amilia Linggawati
Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Vol 1, No 2 (2014): Wisuda Oktober 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Biodiesel is one of the most potential alternative energy for diesel machine since it isrenewable and environmental friendly. Biodiesel can be produced by transesterificationreaction of vegetable oil or animal fat with alcohol and catalyst addition. In this study,biodiesel was produced by transesterification reaction of waste cooking oil andmethanol using a CaO catalyst of blood cockle shells (Anadara granosa). Blood cockleshells (Anadara granosa) can be used as heterogeneous catalysts for biodieselproduction because it contains CaCO 3 that can be decomposed into CaO.Decomposition of the blood cockle shells as heterogeneous catalyst for biodieselproduction was carried out at 900 oC for 5 hours. The yield of biodiesel optimum was81.67% with 3% weight of catalyst, 1:15 of oil and methanol mole ratio, 3 hours ofreaction time and 60±2 oC of reaction temperature.
ESTERIFIKASI MINYAK GORENG BEKAS DENGAN KATALIS H2SO4 DAN TRANSESTERIFIKASI DENGAN KATALIS CaO DARI CANGKANG KERANG DARAH: VARIASI KONDISI ESTERIFIKASI Apriani Sartika; Nurhayati '; Muhdarina '
Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Vol 2, No 1 (2015): Wisuda Februari 2015
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Fuel that becomes important requirement of Indonesian is more dwindling and will run out within the next 12 years. Therefore, the development of alternative fuels that are environmentally friendly is needed. One example of an environmentally friendly alternative fuel is biodiesel. This study aimed to synthesize biodiesel from used cooking oil by esterification and transesterification step and determine the optimum conditions. The parameters varied are the reaction esterification which weight of H2SO4 catalyst and mole ratio of oil:methanol, while temperature and reaction time was remained variable. Transesterification reaction parameters was remained variable. The analysis showed that the conversion of biodiesel was 70,35% obtained by the optimum condition of esterification was weight of H2SO4 catalyst was 3%, the mole ratio of oil: methanol was1:18, temperature was 70oC, and reaction time was 3 hours. Based on this results, it can be concluded that the used cooking oil can be used as raw material for biodiesel synthesis.
Consumer Acceptance Studies Against Meat Jerky Climbing Perch (Anabas testudineus) With the use of Tapioca Flour Nurhayati '; Mery Sukmiwati; Ira N Sari
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 4, No 1 (2017): Wisuda Februari Tahun 2017
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The purpose of this study was to determine the level of consumer acceptance of creamed fish jerky etching with the addition of tapioca flour and tapioca flour to get the right amount in the processing of pulverized jerky climbing perch. Treatment applied is the use of starch 4 levels DB0 (without the addition of starch), DB1 (addition of 50 g of tapioca starch), DB2 (addition of tapioca flour 75g), DB3 (the addition of starch 100 g). The parameters tested in this study is the organoleptic value (color, texture, taste and aroma), the proximate analysis (moisture content, protein content, and ash content). The results showed that the treatment of the most preferred consumers namely the addition of 50 g of starch with a value of 90.00% (72 people) with a water content of 12.89%, 24.80% protein, and ash content of 1.89%.Keywords: Fillet of creamed fish, damselfish, tapioca flour