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Jurnal Entropi
Published by Universitas Negeri Gorontalo
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Core Subject : Education,
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Articles 68 Documents
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KOMPONEN-KOMPONEN PENYUSUN ASAP CAIR SABUT KELAPA HASIL PEMBAKARAN LANGSUNG SERTA PENINGKATAN KUALITASNYA DENGAN DISTILASI DAN PENJERAPAN MENGGUNAKAN ARANG AKTIF Fatimah, Feti
Jurnal Entropi Vol4, No 2, 2009
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Abstract

Pengasapan menggunakan asap cair telah lama diperkenalkan, namun pada umumnya asap cair belum popular di masyarakat karena sulitnya membuat peralatan pirolisis serta keterbatasan bahan dasar kayu, oleh karena itu, perlu dilakukan pembuatan asap cair dengan metode pembakaran langsung menggunakan bahan dasar sabut kelapa. Penelitian ini dilakukan guna mengetahui komponen-komponen penyusun asap cair sabut kelapa yang dibuat dengan metode pembakaran langsung. Guna meningkatkan kualitas asap cair, dilakukan distilasi serta penjerapan asap menggunakan arang aktif. Analisis komponen-komponen dilakukan dengan Kromatografi Gas dan Spektrofotometer Massa (GC-MS). Hasil penelitian menunjukkan bahwa Asap cair sabut kelapa sedikitnya mengandung 21 komponen, asap cair hasil distilasi sedikitnya mengandung 31 komponen dan asap cair hasil penjerapan dengan karbon aktif mengandung sedikitnya 5 komponen. Komponen paling dominan dalam asap cair adalah asam asetat. Konsentrasi asam asetat dalam asap cair asli adalah 0,99 %, asap cair hasil distilasi adalah 1,0245 %, sedangkan asap hasil penjerapan menggunakan arang aktif adalah 0,25%. Dengan demikian, maka proses distilasi dapat meningkatkan kualitas asap cair sabut kelapa yang dibuat menggunakan teknik pembakaran langsung.
Penerapan Model Pembelajaran Bakulikan untuk Meningkatkan Hasil Belajar pada Pokok Bahasan Koloid Siswa Kelas XI IPA-3 SMA Negeri 3 Gorontalo. Soleman, Sumarlin; Bialangi, Nurhayati; Sihaloho, Mangara
Jurnal Entropi VOL 08, NO 01, 2013
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Abstract

Penelitian ini adalah suatu Penelitian Tindakan Kelas dengan subjek penelitian adalah siswa kelas XI IPA-3 SMA Negeri 3 Gorontalo. Penelitian ini bertujuan untuk meningkatkan pemahaman pada pokok Bahasan Koloid dengan menggunakan Model Pembelajaran Bakulikan pada Siswa Kelas XI IPA-3 SMA Negeri 3 Gorontalo, Tahun Ajaran 2010-2011 yang berjumlah 37 orang. Penelitian ini dilaksanakan dalam dua siklus dengan mengikut sertakan seorang guru pengamat. Kriteria keberhasilan penelitian ini adalah 85% siswa memperoleh nilai 7,5 keatas. Hasil penelitian menunjukan bahwa penggunaan Model Pembelajaran Bakulikan ini dapat meningkatkan pemahaman siswa yang dilaksanakan dengan meninngkatnya hasil belajar siswa. Pada sisklus I hasil belajar siswa sebesr 78,38% dan meningkat pada siklus II menjadi 91,89%. Dan hasil penelitian dapat disimpulkan bahwa penggunaan Model Pembelajaran Bakulikan pada materi koloid dapat meningkatkan pemahaman siswa dengan ditunjukan dengan meningkatnya hasil belajar Siswa Kelas XI IPA-3 SMA Negeri 3 Gorontalo.
PERTUMBUHAN KAPANG MONASCUS PURPUREUS DALAM PEMBUATAN ANGKAK PADA MEDIA NASI DAN BERAS Saraswati, Dian
Jurnal Entropi Vol 2, No 2, 2007
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Abstract

Penelitian ini bertujuan yaitu untuk melihat pertumbuhan terbaik dari kapang Monascus purpureus dalam pembuatan angkak pada media nasi dan beras.Metode yang digunakan dalam penelitian ini adalah penelitian non parametrik, dengan uji Tanda yaitu didasarkan pada tanda positif atau negatif bagi selisih nilai pengamatan pada setiap pasangan sampel. Hasil penelitian yaitu untuk uji dua pihak, probabilitasnya p=2 (0,0898)= 0,1796 nilai ini lebih besar dari taraf nyata 0,05 sehingga tidak terdapat perbedaan antara media nasi dan beras pada pertumbuhan jamur Monascus purpureus dalam pembuatan angkak
HUBUNGAN STATUS GIZI DENGAN TINGKAT PENDIDIKAN DAN PENDAPATAN ORANG TUA MAHASISWA BARU POLITEKNIK KESEHATAN DEPKES GORONTALO TAHUN AJARAN 2009/2010 Anasiru, M. Anas
Jurnal Entropi Vol 5, No 2, 2009
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Abstract

Data demoes that found 30 million voluminous age group that experiences nutrient problem less energy kronik or kek. Many watchfulness have been done to show adolescent groups suffer/experiences many nutrient problems. Nutrient problem among others imt (body time index) less than normal limit or thin. Prevalensi adolescent with imt thin range from 30%-40%. Many factors that causes this problem. given the cause factors that influence nutrient problem help the tackling efforts and more influenced and focus. This watchfulness aims to detect connection between nutrient status with education level and Department of Health well-being Polytechnic new student university parents income Gorontalo year 2009. This watchfulness uses analytic design observasional with watchfulness kind cross sectional, to detect to what there connection between nutrient status with education level and department of health well-being polytechnic new student university parents income Gorontalo school year 2009/2010. Sample Department of Health well-being Polytechnic new student university Gorontalo Shool Year. 2009/2010 as much as 289 person. Data analysis is done according to univariat and bivariate. To test connection between watchfulness variable is used test chi square. Statistics test result shows that found connection between nutrient status with parents education especially in woman parents (mother). While in statistics test result man parents is got x2 count > x2 this matter table shows that not found connection between student university nutrient status with father education. Towards student university nutrient status and parents income, statistics test result is got x2 count < x2 table, this matter demoes that found connection between nutrient status with Department of Health well-being Polytechnic new student university parents income Gorontalo.
MENINGKATKAN PEMAHAMAN KONSEP KELARUTAN DAN HASIL KALI KELARUTAN MELALUI PEMBELAJARAN KOOPERATIF TIPE THINK-PAIR-SHARE PADA SISWA KELAS XI SMA NEGERI 1 SUWAWA Handayani, Tri; Ischak, Netty; Sihaloho, Mangara
Jurnal Entropi Vol 5, No 1, 2009
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Abstract

The research is classroom action research and conducted at students of XI class in SMA Negeri 1 Suwawa in 2008/2009 academics years. The sample was 26 students that consisted of 5 male students and 21 female students. The research aimed to improve students comprehension ability in solubility and solubility product concept through cooperative learning of Think-Pair-Share type. The research was had 2 cycles, in where there was an improving of teacher interaction in learning with average value as 3,27 (81,75%) in good category at first cycle and became 3,63 (90,75%) in excellent category at second cycle. In addition, there was an improving of students interaction with average value as 2,50 (62,5%) with enough criteria at first cycle and improved as 3,50 (80,75%) in excellent criteria at second cycle. Also, there was an improving of students achievement that was 62,5% at first cycle and improved to 88% at second cycle. Therefore, it showed that there was an improving of students comprehension ability in solubility and solubility product concept through Cooperative learning of Think-Pair-Share type. Hence, the hypothesis that stated, If in learning about solution and result times solution used cooperative learning of Think-Pair-Share type then students comprehension ability in XI class of SMA N 1 Suwawa can improve is accepted.
Pengaruh Variasi Waktu Kontak Tanaman Bayam Duri terhadap Adsorpsi Logam Berat Kadmium (Cd) Mohamad, Erni
Jurnal Entropi VOL 08, NO 01, 2013
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Abstract

Cadmium waste industrial processes are the result of carcinogenic materials. Target organ toxicity is the kidney and liver Cd. Cadmium waste treatment can be performed by adsorption method using a plant thorn spinach (Amaranthus spinosus L). This plant is used as an adsorbent because it contains a protein which has the amine group (-NH2), carboxyl (-COOH), as well sulfhydril group (-SH). Besides, the plant tissue contained a cell wall composed of cellulose, lignin containing hydroxyl group (-OH). These polar groups capable of binding heavy metals. The purpose of this study was to determine the absorption capacity of spinach plants to metal spikes cadmium (Cd) in tissues of roots, stems and leaves with a variation of contact time. Research carried out by the time variation of 2.4 and 6 on Sunday. Cd concentrations of metals found in plant tissues in the analysis using the method of atomic absorption Spectrophotometry (AAS) at a wavelength of 228.8 nm. The data obtained were then analyzed RAL. The highest order of Cd (II) adsorbed to the variation of time is a week to 2> 4> 6
PENGARUH EKSTRAK METANOL DAUN PALIASA (Kleinhovia hospita, Linn) TERHADAP LAMBUNG MENCIT Mustapa, Mohammad Adam
Jurnal Entropi Vol 1, No 2, 2006
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Abstract

The research about the effect of extract methanol ? Paliasa? leaves (Kleinhovia hospita, Linn) to gastric of mice have been done, which is given orally to improve the scientific data in development of ? Paliasa? Plant as tradisional drug for some kinds of desease. This research has used lest animals of fifteen male micethat divided into 5 groups. Groups I,II,III have been given suspension of extract methanol with 5 % w/v, 10 % w/v and 15 % w/v during 7 days. Group IV has been given acetosal suspension 0,195 % as comparement. Group V have been given Na-CMC as control. Observasion have been done in daya of 8 th then operated the astric of mece which is separated and observea mether there is a gastric ulcer such as blood spot perforation. The result showed that there is no effect to the gastrik of mice by the methanol extract of paliasa leaves.
PENGARUH PEMBELAJARAN SISTEM KOLOID DENGAN MENGGUNAKAN MACROMEDIA FLASH TERHADAP HASIL BELAJAR DAN RETENSI HASIL BELAJAR SISWA KELAS XI IPA SMA NEGERI 1 TAPA (Suatu Penelitian di Kelas XI IPA SMA Negeri 1Tapa TP 2008/2009) Salila, Musrin; Pikoli, Masrid; Suleman, Nita
Jurnal Entropi Vol 5, No 1, 2009
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Abstract

Colloid system [is] a[n mixture form which its [of] located nya [among/between] suspense and condensation ( harsh mixture). Name of colloid given by Thomas Graham in the year 1861. That term Come from yunani Ianguage, that is \" Kolla\" and \" Oid\". Kolla Mean glue while Oid like. In this case related to glue [is] the nature of its diffusion, because colloid system have low dipusi value like glue because its bigger fairish particle than molecule, that is maximum 1 micrometer. Flash Macromedia [is] animation object creator application which [is] powerful. Added with making [of] graphical object [of] vektor which consist in in it, pemprograman [of] Actionscript. such Animassi that is from atom particle motion and molecule which [do] not look with indra pentameter, generalizing cannot from perception, have to earn generalizing with theory. Result learn [is] ability [of] student in knowledge aspect, understanding of, application, analysis, sintesis, and evaluation [at] colloid system items where this ability [is] obtained to [pass/through] media study [of] flash macromedia. ability [of] Student in the aspect expressed in tes score result of learning. Retention result of learning [is] ability [of] student remember items which have been taught by teacher [at] spanning certain time. Retention result of learning student [is] in this case expressed in retention tes score result of learning. This research aim to Know result learn for the items of taught colloid system by using higher flash macromedia from [at] which [is] taught without using flash macromedia and to know retention result of learning for the items of taught colloid system by using higher flash macromedia from [at] which [is] taught without using flash macromedia. This research represent research [of] eksperimental with used [by] pelitian device [at] this research [is] post test design group controle only with XI IPA SMA Country I class student population Live as an ascetic school year 2008 / 2009. Research Sampel divided two class with the each experiment class by using flash macromedia and class control without using flash macromedia with amount of [is] same student that is 21 people. used instrument in the form of objeksif tes. Before tes used to net data, beforehand analyze indicator of[is quality of tes that is executed [by] reliabilitas and validity [in] SMA Country 4 Gorontalo. Validity Tes obtained 100% and reliabilitas equal to 0,69. Result of research obtained a) [at] tes test result of learning experiment class by using higher obtained score flash macromedia that is = 76,87 compared to tes dennga result of learning [at] class control without using flash macromedia with obtained score = 68,54 in hypothesis test concluded that in signifikan level 0,01 with dk = 40 in the reality diperolen assess thitung = 3,93 > from ttabel ( 0,995)(20) = 2,84 and H0 [in] refusing so that can be expressed that result learn natural student [of] study by using flash macromedia by signifikan compared to better [of] natural student [of] study without using macromedia b) [at] retention tes test result of learning experiment class by using higher obtained score flash macromedia that is = - 29,08 compared to tes dennga result of learning [at] class control without using flash macromedia with obtained score = - 30,10 in hypothesis test concluded that in signifikan level 0,01 with dk = 40 in the reality diperolen assess thitung = 0,34 < from ttabel ( 0,995)(20) = 2,84 and H0 [in] accepting so that can be expressed that result learn natural student [of] study by using flash macromedia by signifikan compared to better [of] natural student [of] study without using macromedia from hopotesis test [at] retention tes result of learning to be categorized [by] there [is] [relation/link] in study by using flash macromedia.
Identifikasi Senyawa Alkaloid Dari Ekstrak Metanol Kulit Batang Aksara, Riska; Musa, Weny J.A; Alio, La
Jurnal Entropi VOL 08, NO 01, 2013
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Abstract

Penelitian ini bermaksud untuk mengidentifikasi jenis alkaloid dari ekstrak kental metanol kulit batang mangga (Mangifera indica L). Sebanyak 700 gram serbuk kulit batang mangga dimaserasi dengan pelarut metanol menghasilkan maserat sebanyak 3.1 liter, kemudian di evaporasi pada suhu 40oC menghasilkan ekstrak kental sebanyak 26,89 gram. Hasil pemisahan dengan kromatografi kolom diperoleh 22 fraksi (R1-R22). Dari ke 22 fraksi, fraksi R14 dilanjutkan dengan uji kemurnian secara KLT 1 dimensi dengan berbagai eluen dan KLT 2 dimensi menghasilkan 1 noda. Isolattersebutdilanjutkan dengan uji fitokimia yang memberikan hasil positif terhadap alkaloid dan flavonoid.Terhadap isolate murni dianalisis dengan spektrometri UV-VIS dan IR. Hasil spektropotometri dari isolat menunjukkan bahwa senyawa tersebut merupakan senyawa alkaloid yang mempunyai gugus fungsi N-H (3392,56 cm-1), -CH Alifatik (2927,75 cm-1), C=O (1703,03 cm-1), C-N (1112,85 cm-1), dan N-C=O (613,33 cm-1) serta memberikan serapan pada panjang gelombang 237,5 nm hasil transisi darin * dan n *, yang diakibatkan oleh gugus C=O dan gugus N-H.
PENERAPAN METODE LATIHAN TERBIMBING DALAM UPAYA MENINGKATKAN KETERAMPILAN SISWA KELAS I JURUSAN MESIN PRODUKSI Muhsin, Yahya; Paramata, Dewi Diana
Jurnal Entropi Vol4, No 2, 2009
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Abstract

This research aim to improve skill to use the measuring instrument of shove and micro meter of student in Majors of Technical Engineering Produce of the SMK 3 Gorontalo through guided practice method. This research expected useful can grow enthusiastic of student to learn the physics items, developing ability and professionalism to face and solve the problem of process of physics study. This type of Research is class action research which used the descriptive method. The Result of research indicated that the guided practice method can improve the skill of the student in using measuring instrument. The improvement of skill of student above, meaning that hypothesis of action which have been formulated, which is: If in study use the guided practice method, hence skill to use the measuring instrument shove and micro meter of student in class of Majors Technical Engineering Produce in the SMK 3 Gorontalo improve is acceptable. So conclude that use of guided practice method will improve the skill to use of the measuring instrument shove and micrometer of student in class of Majors Technical Engineering Produce in the SMK 3 Gorontalo.

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