bluuebunny/crossref_metadata_2025 huggingface dataset:
ESTIMASI POPULASI KETAM KENARI (Birgus latro ) PULAU SIOMPU
Authors: Jahidin Jahidin
Published: February 2017

Estimation of the Birgus latro population on the siompu island applied at the supralitora zona, that is the zona of A (north coastal supralitoral), the zona of B (east coastal supralitoral), the zona of C (south coastal supralitoral), and the zona of D (west coastal supralitoral). Objective study was presume of Birgus latro population and sex ratio on the Siompu Island. This research used capture recapture method. Analysis of the population estimation is use anticipation formula by Petersen while female and male ratio use descriptively analysis. Results of research showed that estimate value of population in each of the zona supralitoral area is unegual that is the zona of A is 7,5 or ± 8 individual, the zona of B is 10 individual, the zona of C is 14.4 or ± 14 individual, and the zona of D is 12 individual. Estimate value of the Birgus latro population size on the supralitoral zona of siompu island is 43.9 or ± 44 individual. Male and female ratio in each that; the zona of A is 4:3, the zona of B is 6:2 or 3:1, the zona of C is 9:3 or 3:1, and the zona of D is 8:1. Male and female ratio of Birgus latro at the supralitoral zona of Siompu Island is 27:9 or 3:1.
PENGARUH ESCHERICHIA COLI DAN GRANULOSIT TERHADAP KADAR REACTIVE OXYGEN SPECIES SECARA IN VITRO
Authors: Sukarjati Sukarjati , Soebady Doddy M. , Hinting Aucky , Sudjarwo Sudjarwo
Published: February 2017

In humans, male genital tract infection has been recognized as one of the causes of infertility. Indicators of the occurrence of genital tract infection are the presence of bacteria during semen culture (bacteriospermia) and the finding of leucocyte of more than 1 million/ml semen (leucotytospermia). Escherichia coli (E. coli) is the most common cause of prostatitis and epididymitis. The objective of this study was to determine the effects of E. coli and granulocytes on Reactive Oxygen Species (ROS) level in vitro. This study comprised of two experiments. In the experiment 1, sperm was incubated with E. coli, and the experiment 2, the sperm was incubated with granulocyte. In those experiments, ROS levels were observed. Spermatozoa were obtained from donor with normal spermatozoa according to WHO (1999). Escherichia coli was obtained by culturing the semen of infertile males. Granulocytes were obtained from donors’ blood. Sperm preparation was made by using Percoll gradient column method. Granulocyte isolation used Histopaque 1077 and 1119. ROS level was detected by means of chemiluminescence method with beta counter device. The result of this study showed that in vitro E. coli had the effect on ROS level, both stimulated by peroxidase (p = 0.000) and PMA (p = 0.006). Granulocyte had effect on ROS level. In peroxidase-stimulated ROS level, there was the effect between spermatozoa and granulocyte-incubated sperm (p = 0.000), granulocyte-incubated sperm and granulocyte (p = 0.002), and sperm and granulocyte (p = 0.000). In PMA-stimulated ROS level, there was effect between sperm and granulocyte-incubated sperm (p = 0.000), sperm and granulocyte (p = 0.000), granulocyte-incubated sperm and granulocyte (p = 0.000). In conclusion, under in vitro experiment, sperm incubated with E. coli and sperm incubated with granulocyte had the effect on the level of the ROS.
Food Barn for The Village Community To Strengthen Community Empowerment Program
Authors: Hasmarini Maulidyah Indira , Purnomo Didit
Published: February 2017

This study aimed to assess the achievement level of community empowerment in realizing food security. The result was expected to reveal a model of community empowerment, particularly farmer community institution as an attempt to attain food security. Survey was employed as the research method that involved the farmers (farmer groups) as the members of Food Barn for the Village Community (Lumbung Pangan Masyarakat Desa/LPMD). Technique of rapid rural appraisal was selected in the form of quantitative and qualitative analysis. Preliminary survey in study area was carried out to obtain the characteristic and status of food security; and to mapping the potential and role of Lumbung Pangan Masyarakat Desa in the process of community empowerment. Subsequently, study and analysis was done based on the survey. The results demonstrated the active role of stakeholders (A-B-G-C) was significant in supporting the farmer institution (food barn). The economic and social aspects were also evidenced to have important role in enhancing the farmer community empowerment. This model is called social engine for rural community and local institution, particularly to attain the regional food security.
Pengolahan Limbah Cair Pabrik Pupuk Urea Menggunakan Advanced Oxidation Processes
Authors: Darmadi Darmadi
Published: February 2017

Limbah cair pabrik pupuk urea terdiri dari urea dan amonium yang masing-masing mempunyai konsentrasi berkisar antara 1500-10000 ppm dan 400-3000 ppm. Konsentrasi urea yang tinggi di dalam badan air dapat menyebabkan blooming algae dalam ekosistem tersebut yang dapat mengakibatkan kehidupan biota air lain terserang penyakit. Peristiwa ini terjadi karena kurangnya nutrisi bagi biota air dan sedikitnya sinar matahari yang dapat menembusi permukaan air. Disamping kedua hal tersebut di atas, algae juga dapat memproduksi senyawa beracun bagi biota air dan manusia. Penelitian ini bertujuan untuk mengolah urea menggunakan oksidasi konvensional (H2O2) dan Advanced Oxidation Processes (kombinasi H2O2-Fe2+) pada pH 5 dengan parameter yang digunakan adalah variasi konsen-trasi awal H2O2  dan konsentrasi Fe2+. Hasil percobaan menunjukkan bahwa penurunan konsentrasi urea tertinggi diperoleh pada penggunaan reagen fenton (8000 ppm H2O2 dan 500 ppm Fe2+), yaitu dapat menurunkan urea dari konsentrasi awal urea 2566,145 ppm menjadi 0 ppm. Kinetika reaksi dekomposisi urea menjadi amonium dan amonium menjadi nitrit dan nitrat yang diuji mengikuti laju kinetika reaksi orde 1 (satu) terhadap urea dan orde satu terhadap amonium dengan konstanta laju reaksi masing-masing k1 = 0,019 dan k2 = 0,022 min-1.
Karakteristik Pembakaran Beberapa Jenis Biomassa dalam Fluidized Bed Boiler
Authors: Mahidin Mahidin , Hamdani Hamdani , Muhtadin Muhtadin , Faisal Muhammad , Mahyuddin Mahyuddin
Published: February 2017

Pembakaran biomassa dalam rangka memproduksi energi termal untuk menghasilkan utilitas lain dapat dilakukan dengan mengkonversi energi tersebut ke bentuk energi lain. Boiler dengan unggun terfluidisasi dipilih sebagai teknologi konversi energi termal menjadi energi listrik, karena kukus yang diproduksi dapat digunakan untuk menggerakkan turbin yang dikopling dengan generator listrik. Unit dimana proses pembakaran berlangsung, yaitu ruang bakar dan freeboard dipilih sebagai target pengamatan untuk mengevaluasi kinerja boiler tersebut. Hasil pengamatan terhadap pembakaran tiga jenis biomassa, serpihan kayu ketam, kulit pinang dan ranting kayu kering, memperlihatkan bahwa masing-masing jenis biomassa memiliki karakteristik pembakaran tersendiri. Temperatur pembakaran maksimum untuk serpihan kayu ketam dan ranting kayu kering didapatkan pada waktu pembakaran 30 detik, sementara untuk kulit pinang pada 20 detik. Hasil yang sangat menarik adalah ditemukan bahwa temperatur maksimum dapat ditingkatkan dengan mengubah sistem pengumpan bahan bakar. Sistem pengumpan antara memberikan temperatur maksimum yang lebih tinggi dibanding dengan sistem pengumpan biasa.
Kinetics of Phenol Degradation in Aqueous Solution Oxidized under Low Frequency Ultrasonic Irradiation
Authors: Marwan Marwan
Published: February 2017

Phenol is categorized as a refractory pollutant and its presence in water stream is strictly limited according to the government regulation. The present study investigated the degra-dation of phenol in aqueous solution by the effect of ultrasound. The process took place in a 500 ml glass reactor equipped with magnetic stirring and irradiated by low frequency (28 kHz) ultrasound from a horn type probe. Ultrasonic irradiation was found to enhance oxidation rates at ambient conditions, compared to other approaches. Optimum conditions were observed at a stirring speed of 400 rpm and temperature of 30 C in acidic solution. It was revealed that the phenol degradation was the first order kinetics with respect to phenol. A low value of the activation energy 6.04 kcal/mol suggested that diffusional steps were rate determining during the phenol decomposition. It also confirmed that phenol was mostly degraded in the film region and less occurred in the bulk solution.
Studi Pembuatan Cat Tembok Emulsi dengan Menggunakan Kapur sebagai Bahan Pengisi
Authors: Rahman Abdul , Mulana Farid
Published: February 2017

Studi pembuatan cat tembok emulsi menggunakan bahan pengisi kapur sangat potensial untuk dikembangkan karena ketersediaan kapur yang banyak di alam. Cat tembok emulsi telah dibuat dari campuran bahan pengisi, bahan pengikat, pigmen, pelarut, dan bahan tambahan lainnya. Penelitian ini bertujuan untuk mempelajari apakah cat tembok emulsi dapat dihasilkan dari kapur atau tidak dan untuk mengetahui pengaruh konsentrasi CaO sebagai filler, dan konsentrasi polivinil asetat (PVA) sebagai binder terhadap kualitas cat tembok emulsi yang dihasilkan. Prosedur penelitian dan analisis mutu produk mengacu pada SNI 3564:2009 tentang cat tembok emulsi. Hasil penelitian menunjukkan bahwa kapur dapat digunakan dalam membuat cat tembok emulsi. Baik konsentrasi PVA dan konsentrasi CaO yang divariasikan mempengaruhi semua parameter kualitas cat sebagaimana ditetapkan dalam SNI 3564:2009. Hasil optimum penelitian diperoleh pada perlakuan konsentrasi PVA 20% dan konsentrasi CaO 26% yaitu masing-masing untuk padatan total cat sebesar 76,43%, waktu kering cat 36,00 menit, daya sebar cat 8,4 m2/kg, viskositas cat 110,99 KU, sedangkan daya tutup cat sebesar 8,20 m2/L pada konsentrasi CaO 24%.
Studi Pembuatan Pupuk Kalium Sulfat dari Abu Sekam Padi dan Gipsum Alam Menggunakan Reaktor Tangki Berpengaduk
Authors: Ismayanda Muhammad Husin , Mulana Farid
Published: February 2017

Proses pembuatan pupuk kalium sulfat umumnya dibuat dari asam klorida dan bahan baku yang mengandung anion sulfat (SO4). Dalam penelitian ini, pembuatan pupuk kalium sulfat dari bahan baku batuan gipsum alam sebagai sumber sulfat dan abu sekam padi sebagai sumber kalium telah dilakukan. Penelitian ini bertujuan mengkaji kemungkinan pembuatan pupuk kalium sulfat dari gipsum alam dan abu sekam padi dan juga mengetahui pengaruh kecepatan pengadukan, temperatur operasi dan waktu proses terhadap persentase konversi kalium sulfat yang dihasilkan. Dalam penelitian ini juga dipelajari kinetika reaksi yang terjadi selama proses pembentukan kalium sulfat. Proses pembuatan pupuk kalium sulfat dilakukan dalam reaktor tangki berpengaduk. Varibel berubah dari penelitian ini adalah kecepatan putaran pengaduk, temperatur proses, dan waktu reaksi. Untuk menganalisis produk yang dihasilkan, metode yang digunakan mengacu pada Standar Nasional Indonesia (SNI 02-2809-2005). Hasil penelitian menunjukkan bahwa pupuk kalium sulfat dapat dihasilkan dari reaksi antara gipsum yang mengandung kalsium sulfat dan abu sekam padi yang mengandung kalium karbonat dengan konversi kalium dari endapan sebesar 99,87% dan konversi kalium dari filtrat sebanyak 18,22%. Nilai konversi sulfat dari endapan hanya sebesar 0,69% dan nilai konversi sulfat dari filtrat 0,26%.Dalam penelitian ini kondisi terbaikproses pembuatan pupuk kalium sulfat adalah pada waktu reaksi 80 menit, kecepatan putaran pengaduk 400 rpm dan temperatur operasi 90ºC. Hasil analisis juga menunjukkan bahwa produk pupuk kalium sulfat tidak mengandung asam bebas sebagai H2SO4 dan klorida (Cl), akan tetapi mengandung kalium dan sulfat. Nilai konstanta kecepatan reaksi (k) yang didapat dalam penelitian ini adalah sebesar 0,00218 ppm-1 menit-1 dan nilai laju pengurangan reaktan (rA) sebesar 8,129 x 10-5 ppm/menit.
Pengolahan Limbah Cair Organik dengan Microbial Fuel Cell
Authors: Rinaldi Wahyu , Nurdin Yudha , Syahiddin Syahiddin , Windari Wulan , Agustina Cut Putri
Published: February 2017

Penelitian ini mengusulkan sebuah prototipe reaktor microbial fuel cell (MFC) tanpa membran beraliran kontinyu. Dinding Reaktor dibuat dari pipa PVC dan elektroda dari serat karbon. Mikroba yang ditambatkan di anoda bersumber dari larutan FloTank®. Pada penelitian ini digunakan limbah organik artifisial yang dibuat dari glukosa monohidrat dengan konsentrasi 250 mg/L COD. Waktu tinggal limbah divariasikan pada 0,5; 1; 1,5; dan 2 hari. Nilai rata-rata daya listrik yang dihasilkan untuk waktu tinggal limbah 0,5; 1; 1,5; dan 2 hari berturut-turut adalah 38,02; 43,01; 45,35; 46,71 mW/m2, dan daya volumetrik yang dihasilkan adalah 111,25; 125,86; 132,71; dan 136,69 mW/m3. Persentase penurunan Chemical Oxygen Demand (COD) limbah paling tinggi diperoleh pada waktu tinggal 1,5 hari yaitu sebesar 32,26%.
Pengaruh Penambahan Kaolin Terhadap Reduksi Logam Pb pada Proses Pembakaran Batubara
Authors: Is Isdawani , Gani Asri
Published: February 2017

Adsorpsi emisi pembakaran briket batubara dengan menggunakan adsorben kaolin telah dilakukan. Penelitian ini bertujuan untuk melihat pengaruh rasio adsorben terhadap performa penyerapan SO2 dan logam berat plumbum (Pb). Kaolin dicampur dalam briket batubara dengan variasi massa 2, 4, 6, 8, dan 10%. Briket dibakar pada electrically stainless steel reaction tube pada kondisi temperatur pembakaran yaitu 600, 700, dan 800oC. Analisis kadar pb dilakukan dengan menggunakan atomic absorbtion spectroscopy (AAS) Perkin Elmer. Konsentrasi emisi SO2 dalam gas buang dianalisis menggunakan industrial gas combustion and emission analyzer (E4400i). Hasil percobaan dan analisis menunjukkan, bahwa tingginya rasio adsorben dapat menurunkan trend emisi SO2 yang dihasilkan. Pada emisi logam tingkat kejenuhan penyerapan oleh kaolin berada pada rasio adsorben 6%-10%. Kapasitas adsorpsi yang dihasilkan cenderung tinggi pada suhu pembakaran 600oC.
Effectiveness of the Vertical Gas Ventilation Pipes for Promoting Waste Stabilization in Post-Closure Phase
Authors: Tojo Yasumasa , Kishizawa Natsuki , Matsuto Toshihiko , Matsuo Takayuki
Published: February 2017

To make inside of the municipal solid waste (MSW) landfill aerobic as much as possible is thought to be preferable for promoting waste stabilization, reducing pollutant's load in leachate, minimizing greenhouse gas emission and shortening post-closure-care period. In Japan, installation of semi-aerobic landfill structure has widely spread in order to promote waste stabilization in MSW landfill from 1980s. In semi-aerobic landfill structure, outlet of main leachate collection pipe is opened to atmosphere. Heat generated by aerobic degradation of waste causes natural convection and natural aeration arises from the outlet of leachate collection pipe to the gas vents. It is so-called stack effect. This air flow is thought to be effective for purifying leachate flowing through drainage layer and leachate collection pipes. And it is also thought to be contributing to expanding aerobic region in waste layer in landfill. Recently, measures attempting the promotion of waste stabilization are taken at several landfills at where stabilization of waste delays, in which many vertical gas vents are newly installed and close structure to semi-aerobic landfill is created. However, in many cases, these gas vents are not connected to leachate collection pipes. Many vertical gas vents are just installed without scientific proof regarding whether they can contribute for waste stabilization. In this study, how such installation of gas vents is effective for waste stabilization and aerobization of waste layer was discussed by numerical analysis. In numerical analysis, heat transfer, gas movement by pressure, gas diffusion, biological degradation of organic matter, and heat generation by biodegradation were taken into account. Simulations were carried out by using the general purpose simulator of finite element method. Three types of landfill structure were assumed. As the results, the following information were obtained. In dig-down type landfill, installation of gas vents has no effect for changing air flow. On the other hand, in pile-up type landfill, installation of vertical gas vents can accelerate air invasion and significantly promote waste stabilization, if it has high permeable horizontal layer.
Sintesis Molibdenum Oksida Berpenyangga Silika sebagai Katalis pada Reaksi Oksidasi Etanol Menjadi Asetaldehida
Authors: Rasyidi Achyar , Hasfita Fikri
Published: February 2017

Oksidasi etanol membentuk asetaldehida dengan menggunakan katalis molibdenum oksida berpenyangga silika oksida telah dilakukan. Preparasi katalis dilakukan dengan metode impregnasi dengan rasio Mo : Si 1 : 1, 3 : 1, 6 : 1, 9 : 1. Karakterisasi katalis dilakukan menggunakan X-Ray Difractometer (XRD). Hasil identifikasi menunjukkan bahwa komponen katalis yang telah dibuat mengandung kristal MoO3 dan SiO2. Uji kinerja katalis dilakukan terhadap reaksi oksidasi etanol menjadi asetaldehida. Reaksi oksidasi dilangsungkan dalam reaktor pipa lurus berunggun tetap yang beroperasi pada suhu 200oC, 225oC, 250oC, 275oC, 300oC, 325oC, dan 350oC pada tekanan atmosfir. Hasil uji kinerja menunjukkan bahwa konversi tertinggi diperoleh sebesar 91,99% pada temperatur 350oC menggunakan katalis dengan rasio Mo : Si = 9 : 1. Selektivitas tertinggi diperoleh sebesar 89,10% pada temperatur 200oC dengan rasio Mo : Si = 9 : 1. Yield tertinggi diperoleh sebesar 74,80% pada temperatur 350oC pada katalis dengan rasio Mo : Si = 9 : 1.
Pemanfaatan Limbah Pecahan Genteng sebagai Katalis dalam Reaksi Pirolisis Plastik Polipropilena Menjadi Bahan Bakar Alternatif
Authors: Syahputra Rahmat Jaya Eka , Utami Tri , Nugrahaningtyas Khoirina Dwi , Ridasepri Arikasuci Fitonnah , Astuti Widy
Published: February 2017

Artikel ini mendiskusikan karakterisasi pecahan genteng dan pemanfaatannya untuk memproduksi katalis. Tujuan penelitian ini adalah untuk mengetahui karakteristik pecahan genteng dan kemudian melakukan modifikasi untuk pembuatan katalis. Katalis dibuat dengan pilarisasi nikel ke dalam pecahan genteng, dan dikarakterisasi menggunakan x-ray diffractometer (XRD). Pirolisis dilakukan terhadap limbah plastik polipropilena hingga diperoleh cairan minyak. Minyak direforming menggunakan katalis pecahan genteng terpilarisasi nikel. Hasil karakterisasi menunjukkan bahwa pecahan genteng mempunyai kandungan logam oksida berdasarkan standar Fe2O3, NiO2, Al2O3, SiO2. Refinement dilakukan menggunakan program Rietica metode Le-Bail dan diperoleh hasil nilai keberterimaan Rp/Rwp 10. Setiap 1,3 kg sampel limbah polipropilena diperoleh hasil minyak sebanyak 1,7 L. Hasil reforming menunjukkan bahwa densitas minyak sebesar 745,919 kg/m3 dan viskositas 0,720 cp. Berdasarkan analisis GC-MS diperoleh fraksi pembentukan terbesar dari katalis pecahan genteng terpilarisasi nikel adalah fraksi C10 - C12. Sehingga, pecahan genteng yang terpilarisasi nikel efektif dijadikan sebagai katalisator dalam proses pirolisis untuk mengubah limbah palstik polipropilena menjadi bahan bakar.
Penyisihan Fe dalam Air Tanah Menggunakan Zeolit Alam Banda Aceh Teraktivasi
Authors: Hasni Hasni , Arahman Nasrul , Mulyati Sri
Published: February 2017

Kajian ini membahas proses pemisahan logam besi dalam sampel air secara adsorpsi. Secara umum bertujuan untuk melihat pengaruh perlakukan zeolit alam terhadap efisiensi penyisihan logam besi dalam sampel air baku. Proses adsorpsi menggunakan zeolit alam Banda Aceh dengan variasi ukuran partikel 40, 60, 80, dan 100 mesh.  Kadar besi (Fe) dalam larutan sampel buatan adalah 1,25 mg/l agar mendekati kadar logam besi sesungguhnya. Kadar sampel asli air tanah dari Desa Alue Peunyareng Kabupaten Aceh Barat sebesar 1,1206 mg/l. Analisis kadar logam besi dilakukan dengan alat spektrofotometer. Hasil penelitian menunjukkan bahwa kemampuan adsorpsi maksimum diperoleh pada penyerapan dengan zeolit alam berukuran 100 mesh baik untuk sampel asli maupun sampel buatan. Aktivasi zeolit alam menaikkan kemampuan adsorpsi bahan penyerap hingga 154,72%. Kemampuan penyerapan yang dimiliki zeolit alam menurun hingga 92,25% manakala sampel yang diserap berupa air tanah karena sampel masih banyak mengandung bahan pengotor.
Pengaruh Penggunaan Fotokatalis TiO2/Resin, TiO2/Zeolit Dan TiO2/Karbon Aktif dalam Proses Fotoreduksi Ion Hg(II) dengan Metode SODIS (Solar Desinfection Water)
Authors: Ridho Rosyid
Published: February 2017

Pada penelitian ini telah dilakukan proses pembuatan fotokatalis TiO2/resin, TiO2/zeolit dan TiO2/karbon aktif yang selanjutnya dikarakterisasi dengan XRD dan Energi Band Gap (Eg). Karakterisasi XRD bertujuan untuk mengetahui telah terbentuknya fotokatalis. Sedangkan karaktererisasi Energi Band Gap (Eg) bertujuan untuk mengetahui tingkat celah energi pada masing-masing fotokatalis dimana semakin tinggi harga Energi Band Gap maka efektivitas fotoreduksi akan semakin tinggi. Hasil dari karakterisasi XRD menunjukkan bahwa fotokatalis TiO2-resin, TiO2-zeolit, dan TiO2/karbon aktif telah terbentuk, sedangkan hasil energi band gap untuk TiO2/zeolit sebesar 3,608 eV, TiO2/resin sebesar 3,38 eV, sedangkan TiO2/karbon aktif adalah 3,48 eV. Didasarkan pada harga Eg tersebut diharapkan aktivitas fotokatalis TiO2/zeolit lebih tinggi daripada fotokatalis yang lain. Pengujian aktivitas fotokatalis dilakukan dengan mereaksikan 50 mg masing-masing fotokatalis untuk mereduksi 50 mL larutan Hg (II) 5 ppm yang disinari oleh sinar matahari sebagai sumber cahaya dengan variasi waktu penyinaran (1,2,3,4,5 dan 6 jam). Dari hasil penyinaran menunjukkan bahwa semakin tinggi waktu penyinaran semakin tinggi % Hg tereduksi, dalam penelitian ini efektivitas fotokatalis terbaik adalah TiO2/zeolit dengan efektivitas fotoreduksi pada penyinaran 6 jam sebesar 98,5%. Pada tahap ini juga dipelajari pengaruh konsentrasi Ion Hg (II) (0; 2,5; 5; 10; 20; dan 25) dengan waktu penyinaran 6 jam. Data yang diperoleh menunjukkan semakin tinggi konsentrasi awal ion Hg, semakin rendah efektivitas fotoreduksinya.
Mesopori MCM-41 sebagai Adsorben: Kajian Kinetika dan Isotherm Adsorpsi Limbah Cair Tapioka
Authors: Darmansyah Darmansyah , Ginting Simparmin , Ardiana Lisa , Saputra Hens
Published: February 2017

Telah dilakukan penelitian penggunaan material aluminasilikat MCM-41 sebagai adsorben limbah cair tapioka. Dalam penelitian ini dipelajari permodelan isotermal dan kinetika adsorpsi dari material MCM-41 pada proses adsorpsi limbah cair tapioka. Isotermal Langmuir dan Freundlich digunakan sebagai permodelan isotermal data penelitian. Dari data penelitian yang diperoleh pada konsentrasi COD sebesar 416 - 784 mg/L, proses adsorpsi limbah cair tapioka oleh MCM-41 sesuai dengan pendekatan isothermal Langmuir.Â  Kapasitas maksimum adsorpsi MCM-41 diperoleh dari pendekatan Langmuir adalah sebesar 15,92 mg/g. Model kinetika pseudo-orde pertama dan pseudo-orde kedua digunakan untuk analisis kinetika adsorpsi pada data penelitian. Model kinetik pseudo-orde pertama yang sesuai dengan proses adsorpsi limbah cair tapioka dengan laju penyerapan adalah 7,48 x 10-2 dan 7,37 x 10-2 g/(min-mg) untuk konsentrasi awal secara berturut-turut adalah 608 dan 784 mg/L.
Pembuatan Biofuel dari Palm Stearin dengan Proses Perengkahan Katalitik Menggunakan Katalis ZSM-5
Authors: Tambun Rondang , Saptawaldi Rangga P , Nasution Muhammad Anshori , Gusti Oktris N
Published: February 2017

Bahan bakar fosil telah digunakan selama beberapa abad yang menyebabkan ketersediaannya semakin berkurang. Hal ini mendorong perlu dilakukan pengembangan baru di bidang energi. Indonesia merupakan salah satu negara penghasil minyak sawit terbesar di dunia. Minyak sawit ini dapat dikonversi melalui proses perengkahan katalitik menjadi biofuel yang ramah lingkungan karena tidak mengandung nitrogen dan sulfur seperti gasolin, kerosin dan diesel. Pada penelitian ini digunakan palm stearin sebagai bahan baku dengan katalis ZSM-5 yang memiliki luas permukaan 425 m2/g dan rasio Si/Al 50. Variabel yang divariasikan adalah suhu operasi dari 400oC - 450oC dan waktu reaksi dari 60 menit - 150 menit. Hasil penelitian menunjukkan yield liquid product (biofuel) tertinggi diperoleh sebesar 93,29% pada suhu 400oC saat waktu reaksi 60 menit, dengan komposisi C6-C12  sebesar 21,82%, C14-C16 sebesar 19,21% dan C18-C28 sebesar 58,97%.
Komponen Kimia Asap Cair Hasil Pirolisis Limbah Padat Kelapa Sawit
Authors: Haji Abdul Gani
Published: February 2017

Chemical components of liquid smoke which is produced via pyrolisis of palm oil solid waste have been analyzed by using gas chromatography mass spectroscopy (GC-MS). Solid waste consists of shell, empty fruit bunch, and palm fiber. Solid waste was obtained from palm oil manufactory in Tanjung Semantok,  Aceh province. The objective of this research was to investigate the chemical components in liquid smoke obtained from various palm oil solid waste. Sample was pyrolyzed at 500°C for 5 hours by using tube furnace reactor type 21100 which is equipped by thermolyne as temperature adjustment. The yield of pyrolysis from shell, empty fruit bunch and palm fiber are 52,02; 29,59; and 34,88%, respectively. The results showed that 27; 13 and 11 compounds of chemical were observed in liquid smoke obtained by pyrolysis of shell, empty fruit bunch, and palm fiber, respectively. Overall, acetic acid and phenol are the highest concentration of chemical obtained in this research.
Pengembangan Membran Magnesol untuk Pemurnian Biodiesel
Authors: Saiful Saiful , Nurfitriana Nurfitriana , Ramli Muliadi , Maulana Ilham
Published: February 2017

Magnesol membrane has been prepared by mixing chitosan polymer with magnesol particles via phase inversion method. The optimum compositions of adsorptive membranes were 3% chitosan, 15% DMF and 60% loading adsorbent. The porosity of these membranes was 34,17% and swelling degree was 51,91%. The membrane clean water flux was 224,4 Lm‑2h‑1 at a transmembrane pressure of 2.5 bar.  The adsorptive membrane possesses an open and interconnected porous structure with a large surface area available for biodiesel purities adsorption. The results showed that after contacting in 60 minutes, numbers of acid value was reduced as 81,12% which is in accordance with value of SNI quality standards. In addition, the soap content adsorbed was 86,74%  as potassium soap and 86,73% as sodium soap. The regenerated membrane can be reused with mantaining the high adsorption capacity. The methanol was better than ethanol to regenerate the magnesol membrane. The Magnesol membrane will be a new alternative method for biodiesel purification.Keywords: biodiesel, membrane adsorption, chitosan, magnesol, acid number, soap
Pengolahan Limbah Cair Laundry Menggunakan Membran Selulosa Diasetat Berbasis Selulosa Pulp Kayu Sengon (Paraserianthes falcataria)
Authors: Setiawan Vera Roni , Rosnelly Cut Meurah , Darmadi Darmadi
Published: February 2017

The improvement of laundry activity brought a negative effect on the environment because laundry wastewater have a high content pollutants such as phosphate, surfactants, mineral, nitrogen, COD and other components, so the treatment is needed before being discharged into terristorial water. Laundry wastewater treatment has been conducted by membrane technology. Preparation of cellulose diacetate  membranes with ultrafiltration process had be done by phase inversion using dimethylformamide (DMF) as a solvent. The filtration experiment showed that the highest membrane flux was 77,408 L/m2.h at TMP 3 bar. While the lowest flux at TMP 1 bar was 55.649 L/m2.h. Rejection of membrane ultrafiltration for parameters of COD, phosphate, and surfactant were 67%, 72%, and 63% respectively.Keywords: cellulose diacetate membranes, laundry wastewater, flux, rejection
Pembuatan Papan Partikel (Particle Board) dari Tandan Kosong Sawit dengan Perekat Kulit Akasia dan Gambir
Authors: Fathanah Umi , Sofyana Sofyana
Published: February 2017

The need of wood as one of raw materials in furniture industry keeps increasing. One of efforts to reduce wood consumption is to develop research by creating composite design from material that contains sellulose to be particle board. Particle board is one of material alternatives that can be wood substitute. The objective of this research is to investigate the effect of natural-adhesive-mixture composition (acacia bark and gambier) with oil-palm-empty bunch toward mechanical property of particle board. Characterization of particle board was carried out by undertaking mechanical property testing (tensile strength and compressive strength) under wet and dry conditions. Composition variations of adhesive and oil-palm-empty bunch were 30:70; 40:60; 50:50; 60:40; 70:30. Making process of particle board is carried out by mixing oil-palm-empty bunch and adhesive with addition of 2% para-formaldehyde and water as much of 10%. Furthermore, the mixture is compressed by using Hot Press at temperature of 150oC and pressure of 10 kg/cm2 for 15 minutes. The research result indicates that the higher the adhesive composition (either adhesives of acacia bark or gambier), particle board resulted is better. In dry condition,  values of the tensile strength of particle boards  that have acacia bark adhesive and gambier adhesive have range of 84.2 - 104 Kgf/cm2 and 83.4 - 81.5 kg/cm2, respectively. Whereas, values of compressive strength of particle boards that have adhesives of acacia bark and gambier are in the range of 6.8 - 10.5 kg/cm2  and 6.3 - 9.3 kg/cm2, respectively. The values of tensile strength and compressive strength are obtained on compositions  of adhesive: oil-palm-empty bunch ≥ 40:60, and they have fulfilled satandard of SNI 03-2105-1996. The values of tensile strength and compressive strength of particle board in wet condition, either adhesives of acacia bark or gambier, have not fulfilled standard of SNI 03-2105-1996.Keywords: empty-bunch-oil palm, acacia bark, gambier, particle board, tensile strength
Kajian Kinerja Penukar Panas Tipe Shell and Tube Satu Haluan dengan Pengontrolan Suhu Outlet
Authors: Syah Hendri
Published: February 2017

Kajian ini bertujuan untuk menentukan kinerja penukar panas tipe shell and tube dengan pengaturan suhu outlet.  Penukar panas yang digunakan dalam kajian ini adalah penukar panas tipe  shell and tube dengan bahan bakar  kerosen.  Parameter  kinerja  yang  dianalisis  adalah  konsumsi  kerosen, suhu keluaran,  koefisien perpindahan panas keseluruhan,  laju perpindahan panas, number of  heat transfer units (NTU),  dan efektivitas. Hasilnya menunjukkan bahwa laju perpindahan panas dalam penukar panas berkisar dari 69,24 hingga 83,13 kW. Energi panas yang dihasilkan dalam eksperimen III  lebih tinggi karena temperaturnya paling tinggi,  ini berbeda dengan efektivitas dan NTU-nya karena masing-masing memiliki nilai terendah (0,77 dan 2,55). Perbedaan tekanan total yang terjadi dalam penukar panas tersebut adalah 366,8 Pa.  Nilai ini jauh lebih kecil dibandingkan tekanan statik kipas yang dipakai yaitu 78 mm H2O.
Leaching of Oil from Tuna Fish Liver by Using Solvent of Methyl-Ethyl Ketone
Authors: Lubis Mirna Rahmah , M. Nova
Published: February 2017

Research of oil leaching from Tuna Fish Liver has been carried out by extracting of tuna fish liver in soxhlet by using methyl-ethyl ketone as solvent. Liver of fresh tuna fish is blended, put into soxhlet, and extracted at temperatures of 60oC, 65oC, 70oC, 75oC, and 80oC. After obtaining the oil, separation between solvent and oil is carried out by distillation. Oil obtained is analyzed by testing the yield, acid number, Iodine value, viscosity, and its impurities content. Yield obtained is influenced by temperature and time of leaching. Both variables indicates that the higher the variables, the more fish liver oil obtained. Maximum yield obtained is 25.552% at operating condition of leaching temperature 80oC, and leaching duration of 5 hours.
Análise da produção monográfica discente em design: um estudo de caso em uma instituição de ensino superior do Rio Grande do Sul
Authors: Silveira André Da , Ribeiro Vinicius Gadis
Published: February 2017

Este trabalho analisa 215 monografias discentes produzidas entre os anos de 2008 até 2013. O estudo foi realizado utilizando a técnica de análise de conteúdo. As monografias foram cadastradas numa ferramenta digital - desenvolvida para suportar a análise. Após, esses dados foram agrupados e reagrupados de acordo com os critérios: lexical, ordem taxonômica e contiguidade. Estas informações revelaram padrões de relacionamentos entre entidades e grupos de entidades. A partir da análise inicial dos dados, foram detectadas as metodologias de projeto mais comumente utilizadas, os autores mais requisitados, as áreas temáticas de pesquisa, entre outros assuntos. As informações coletadas estão sendo usadas como material de apoio ao ensino em disciplinas de projeto e trabalho de conclusão de curso.
ANALISIS PERBEDAAN PENDAPATAN ASLI DAERAH (PAD) SEBELUM DAN SESUDAH PENGALIHAN PAJAK BUMI DAN BANGUNAN SEKTOR PERKOTAAN PERDESAAN (PBB-P2)
Authors: Hutomo Sigit
Published: February 2017

This research is aimed to find empirical evidence on whether there is a significant difference between Regionally-Generated Income (Pendapatan Asli Daerah, or PAD) before and after the shift of the collection of Land and Building Taxes for Rural and Urban Sectors (Pajak Bumi dan Bangunan sektor Pedesaan dan Perkotaan, or PBB-P2) to regional governments. PAD is measured by local revenue sources. Three regencies/municipalities that have experienced the shift during the 2011-2013 period were selected for sampling. Secondary data were obtained from Revenue Realization Reports (Laporan Realisasi PAD) of Yogyakarta for the years 2011-2013, Revenue Realization Reports of Sleman and Bantul for the years 2012-2013, and PBB-P2 and the Sales Value of the Tax Object (Nilai Jual Objek Pajak, or NJOP) data obtained from DPPKAD. Meanwhile, primary data were obtained through interviews conducted with the PBB-P2 tax officers. The findings showed a significant differenceÂ of PAD. This, however, was not due to the shift of PBB-P2 tax collection to regional governments. The difference was caused by other revenue sources.Keywords: PBB-P2 tax collection shift, PAD
A escola como espaço da educação para a cidadania
Authors: Moraes Telma Elizabete de , Marques Silvio César Moral
Published: February 2017

Norberto Bobbio vê no estado democrático o único meio capaz de colocar as pessoas em igualdade de condições e de garantir a existência e continuidade das liberdades fundamentais, refletindo sobre o contraste que existe entre os ideais democráticos e a “democracia real”. Daí a necessidade de concentrar a discussão entre o que foi prometido e o efetivamente praticado, ou seja, tentar um prognóstico sobre as “promessas” não cumpridas. Para o autor, o termo democracia apresentar-se-ia sob dois aspectos: primeiro como “um conjunto de instituições ou técnicas de governo”, sendo essas o “sufrágio universal, regime parlamentar, reconhecimento dos direitos civis, princípios da maioria”; em segundo lugar, como “um certo ideal a ser perseguido”. Assim, a democracia define-se como técnica de governo e meio empregado para organizar a sociedade e, como ideal, propõe a busca por um fim desejado, i.e., a igualdade entre os homens, somente alcançada pela educação.
POLÍTICA EDUCACIONAL NA PERSPECTIVA DE PAULO FREIRE
Authors: Lima Paulo Gomes
Published: February 2017

O presente artigo discute algumas interfaces das políticas públicas na perspectiva neoliberal e as implicações para a educação, a tensão entre os projetos de sociedade e a política e educação em Paulo Freire. A política educacional em Paulo Freire tem um caráter problematizador, político e dialético, visto que propõe o rompimento da consciência ingênua e o despertamento para a consciência crítica por meio do chamamento dos atores sociais para elencar e delinear, não somente as necessidades, mas a possibilidade concreta de universalização da educação como direito de todos em sentido pleno, da democracia na sociedade como condição para a existência de uma escola democrática e da justiça social como manifestação efetiva no combate a qualquer tipo de perversidade que desqualifica e coisifica o homem como objeto manipulável do capital.
A EVOLUÇÃO DO PENSAMENTO PEDAGÓGICO NA HISTÓRIA
Authors: Montenegro Lucas
Published: February 2017

Por ocasião da publicação do livro Fundamentos da Educação: recortes e discussões – Vol. II, ocorrida em março de 2015, os profesores Paulo Gomes Lima e Silvio César Moral Marques nos concederam a presente entrevista, destacando a finalidade da obra, o conceito de educação e contribuições para a formação de educadores na atualidade.
POLÍTICA DE GESTÃO DE PESSOAL DA SEE/SP
Authors: Santos Edson Segamarchi dos
Published: February 2017

O artigo tem por objetivo analisar os principais traços que caracterizam a política de gestão de pessoal docente da Secretaria Estadual de Educação de São Paulo (SEE/SP), a situação funcional de seus quadros docentes. O texto inicia-se contemplando as características que definem os princípios que fundamentam a burocracia moderna. A análise dos dados apresentados indica que a SEE/SP tem desenvolvido o projeto educacional de ensino na escola pública paulista, nas últimas décadas, sob a responsabilidade majoritária de professores contratados em caráter temporário de trabalho, considerado aqui como em um dos elementos responsáveis pela baixa qualidade da educação aferida nas avalições padronizadas.
ADOECIMENTO E SOFRIMENTO DOCENTE NA PERSPECTIVA DA PRECARIZAÇÃO DO TRABALHO
Authors: Forattini Cristina Damm , Lucena Carlos Alberto
Published: February 2017

Em todo o mundo do trabalho o adoecimento sempre foi um fator inerente à situação de exploração, condições superdimensionadas para a suportação física e psíquica do trabalhador. A objetivação do trabalhador torna-o um ser amorfo, desefetivado, desprovido da capacidade de racionalizar sua condição de objeto no mundo e do mundo. Nessa perspectiva, o artigo apresentado se propõe a discutir o adoecimento e sofrimento dos docentes em Instituições Federais de Ensino Superior no Brasil, a partir de dados empíricos colhidos por pesquisadores brasileiros, trazendo à luz a precarização do trabalho docente, os fatores alienantes, de intensificação do trabalho imaterial improdutivo e a própria mercantilização da ciência.
A EDUCAÇÃO À DISTÂNCIA NO CONTEXTO DA REESTRUTURAÇÃO PRODUTIVA DO CAPITAL
Authors: Oliveira Luciana Charão de , Santos Adriana C. Omena
Published: February 2017

Este texto tem como objetivo apontar as mudanças sofridas no campo educacional em decorrência do processo de reestruturação produtiva do capital, que opera transformações nas relações entre capital, trabalho e educação. Apontamos como principais consequências deste processo a intensificação e a precarização do trabalho docente. E neste contexto tomamos o estudo da modalidade Educação a Distância nas Instituições Públicas de Ensino Superior (IPES). As IPES estão sujeitas ao Sistema Universidade Aberta do Brasil (UAB) que promove a articulação entre as esferas federais, estaduais e municipais para a oferta de cursos na modalidade EaD e, também, regula as atividades daqueles que nesta atuam. Tais atividades não são regulamentadas e não viabilizam vínculos empregatícios com as IPES. Neste texto enfatizamos a atividade do tutor no contexto da EaD.
A CONTRIBUIÇÃO DO ENSINO PRÁTICO PARA A FORMAÇÃO HUMANÍSTICA DO ALUNO DE DIREITO E A CONTRIBUIÇÃO DO AMBIENTE SALESIANO
Authors: Santos Gabriel Ludwig Ventorin dos
Published: February 2017

No presente texto consideramos relevante expor os principais elementos constitutivos da prática jurídica no ensino superior, destacando os elementos de formação humanística que são impostos a todos os cursos superiores em virtude de ordem normativa até os valores que constituem precipuamente a instituição em análise. Da mesma forma entendeu-se necessário apresentar as exigências de formação do ensino de direito dando destaque ao ensino prático e funcionamento dos Núcleo de Prática Jurídica em geral através das análises normativas. Com efeito, a ambientação da pesquisa com a apresentação dos valores salesianos, através do ressaltar da atuação do Centro Universitário Salesiano, destacando os valores institucionais, impõe a relevância da sensibilização do alunado e sensibilidade do docente orientador na prática jurídica a fim de que esta alcance um objetivo maior que a formação profissional técnica, mas seja instrumento de garantias do direito fundamental
TRABALHO E EDUCAÇÃO NO CONTEXTO DE TRANSFORMAÇÕES DA AGROINDÚSTRIA CANAVIEIRA NO FINAL DO SÉCULO XX
Authors: Nascimento Manoel Nelito Matheus do
Published: February 2017

O artigo analisa a relação trabalho-educação no contexto das transformações econômicas, políticas e sociais das últimas décadas do século XX, com recorte na agroindústria canavieira. Essas transformações produziram mudanças rápidas e radicais na produção, nos processos de trabalho, hábitos de consumo, poderes e prática do Estado, com desdobramentos para todas as instâncias da sociedade em todo o planeta. A reestruturação da produção ampliou significativamente a divisão do trabalho, com as novas tecnologias e novas formas de gestão, com consequências de grandes reduções no número de postos de trabalho, elevando o número de trabalhadores desempregados, assim como vem ocorrendo um processo de precarização do trabalho. Desta forma, o capital tem ampliado a exploração do trabalhador, exigindo que seja polivalente, flexível, possuidor de múltiplas competências, apto para cumprir múltiplas funções. Neste contexto, as ações educativas escolares e não-escolares se transformaram em resposta aos novos requisitos impostos para o trabalho.
SOBRE ÁGUAS E MENINOS
Authors: Prezotto Marissol , Ferreira Luciana Haddad , Aragão Ana Maria Falcão de
Published: February 2017

Diante de reflexões acerca da formação continuada docente e das vivências realizadas no cotidiano da escola, traçamos os sentidos da docência numa perspectiva histórico-cultural. Tal investigação surge de análise teórico-conceitual que articula as contribuições de L. S. Vigotski com importantes dimensões da formação de professores defendidas por pesquisadores da atualidade. Dentre elas, destacamos a potencialidade das narrativas pedagógicas para o desenvolvimento docente. Ao longo da escrita, as vivências de professor são cotejadas com as teorias e nos apontam para a atividade formativa continuada como processo de apropriação e elaboração da própria prática, que considera a memória, a percepção e a experiência como funções psicológicas interdependentes que possibilitam ao docente não só apreender saberes, como também produzir novos conhecimentos acerca de seu trabalho.
EUROPEIZAÇÃO E EDUCAÇÃO DE ADULTOS
Authors: Antunes Fátima
Published: February 2017

Neste texto mobilizamos a problemática da europeização das políticas públicas na União Europeia para sinalizar percursos e processos de constituição da educação de adultos como área de intervenção e como componente do setor e da política europeia de educação.Procuramos documentar a progressiva visibilidade da educação de adultos, a par da centralidade acrescida da educação ao longo da vida nas políticas europeias e em paralelo com um mandato e alcance associados à sua referenciação predominante à esfera económica. O balanço intercalar, em 2015, do Programa Educação & Formação 2020 sugere que, a manter-se o rumo seguido, é pouco provável a ampliação significativa da participação da população adulta em educação e parece mais plausível que ocorram avanços na regulação da educação de adultos nos termos de um mercado.
A UTILIDADE DA EDUCAÇÃO DE ADULTOS
Authors: Guimarães Paula
Published: February 2017

Neste artigo, procura-se discutir sentidos dominantes nos últimos anos nas políticas públicas de educação de adultos em Portugal. Para tal, num primeiro momento, esclarece-se as finalidades contidas nas orientações da União Europeia para a aprendizagem ao longo da vida. Num segundo, abordam-se as reinterpretações efetuadas nas políticas públicas nacionais de educação de adultos nas últimas duas décadas. Conclui-se destacando a influência da União Europeia nos discursos políticos portugueses, bem como a progressiva importância atribuída ao carácter utilitário da educação de adultos relativamente ao desenvolvimento económico e à gestão de recursos humanos, enquanto se registam cada vez menos sentidos humanistas e de educação crítica.
ESTUDANTES NÃO-TRADICIONAIS NO ENSINO SUPERIOR
Authors: Almeida António Carlos Pestana Fragoso de , Quintas Helena Luisa , Gonçalves Teresa Isabel Campos
Published: February 2017

Este artigo resulta de dois projetos de investigação centrados sobre estudantes não-tradicionais no ensino superior. Os nossos objetivos foram compreender as barreiras à aprendizagem e ao sucesso académico, do ponto de vista dos vários atores sociais na academia; e compreender as barreiras que os mesmos estudantes tiveram na sua transição para o mundo do trabalho. Os resultados mostram que existem muitos fatores situacionais e institucionais que funcionam como obstáculos para estes estudantes. Mostram ainda que a idade é um fator determinante na contratação e que as características do mercado de trabalho, hoje, dificultam muito a inserção profissional dos graduados não-tradicionais.
ESTADO, GLOBALIZAÇÃO E POLÍTICAS PÚBLICAS DE EDUCAÇÃO
Authors: Paula Mauro Lima de
Published: February 2017

O objetivo deste artigo é discutir as novas formas de atuação do Estado contemporâneo especialmente no tocante à configuração das políticas públicas de educação no Brasil a partir da década de 1990 inseridas no contexto da chamada globalização e das reformas neoliberais, bem como, de forma mais específica, analisar as políticas educacionais implementadas no estado de São Paulo durante o mesmo período. Para tanto, dividimos este trabalho em duas partes. Na primeira, apresentamos uma discussão conceitual sobre os elementos centrais que compõem texto, quais sejam, Estado, Globalização e Neoliberalismo e suas relações com as políticas públicas à luz do debate marxista atual. Numa segunda etapa, pretendemos apresentar um mapeamento das políticas educacionais realizadas pelo estado de São Paulo a partir dos anos 1990 e sua relação com estes elementos chaves na elaboração e implementação destas.
ALGUNS DESAFIOS NA CONDUÇÃO DOS ESTÁGIOS NOS CURSOS DE LICENCIATURA
Authors: Gama Renata Prenstteter
Published: February 2017

O artigo procura caracterizar e pontuar alguns desafios na condução do estágio curricular na formação inicial de professores. O texto traz questionamentos sobre a concepção e a intencionalidade de constituir-se em um eixo articulador, considerando o contexto da formação de professores, da escola atual e da complexidade da prática docente. Tomando como base a pesquisas realizadas com professores iniciantes e as diretrizes para a formação de professores no Brasil, no primeiro momento trazemos uma reflexão sobre um panorama geral do estágio docente na grade curricular e no segundo momento descrevemos a condução de uma experiência desenvolvida nas disciplinas estágio supervisionada de matemática da Universidade Federal de São Carlos (UFSCar).
O ESTÁGIO E A CONSTRUÇÃO DOS CONHECIMENTOS PROFISSIONAIS NOS DIFERENTES ESPAÇOS DE FORMAÇÃO
Authors: Passos Laurizete Ferragut , Marquesin Denise Filomena Bagne
Published: February 2017

Por compreender que na escola a organização das práticas deixa marcas e influências no modo próprio de ser, na produção de certos posicionamentos e, consequentemente, na identidade de cada um, buscou-se refletir e analisar de que forma as instituições escolares - a universidade, a escola e a própria sala de aula – tornam-se espaços de produção de conhecimentos para as alunas das séries finais do curso de Pedagogia, quando realizam o estágio. Destacou-se, nesse contexto, o componente matemático no processo de produção de conhecimento e a partir de narrativas que foram tomadas como instrumento de análise. A busca da identificação sobre como os espaços de formação se transformam em lugares de formação, tendo em evidência a constituição da profissionalidade dos alunos quando realizam estágio, impulsiona a discussão sobre os sentidos e significados dos termos “espaço” e “tempo”, “lugar” e “território”.