Perbandingan Kadar Sukrosa Dalam Madu Randu Dan Madu Kelengkeng Dari Peternak Lebah Dan Madu Perdagangan Di Kota Semarang

Key words: cottonwoods honey, longan honey, sucrose, KCKT Honey is a natural liquid that generally has a sweet taste and produced by the bees. Along with the increase in consumption of honey, honey adulteration grew a way to get the benefits. Sucrose sugar often added because its price is relative cheap. The content of sucrose become a measurement of the authenticity of honey. The spurious honey harm consumers because of different composition so that its benefits are also different.The purpose of this research is to determine the sucrose content and the quantitation of sucrose in longan honey and honey cottonwoods from beekeepers and honey trade in the City of Semarang using HPLC.Honey samples were taken randomized with three sample of cottonwoods and three longan honey from beekeepers area in Ngaliyan, Gringsing dan Ambarawa and honey trade in the City of Semarang. The determination of sucrose using HPLC system (Waters ec 2695) equipped with C18 column (C18 5um Sunfire; 4.6 x150mm) and detector UV (UV/Visible Waters 2489) at wavelength 190 nm. Mobile phase consisted of a mixture of acetonitrile and aquabides (75:25, v/v) with a flow rate of 1.0 mL/min.Research results showed that the average content of sucrose in honey samples cottonwoods and longan honey from beekeepers respectively 4,03% dan 2,98%, while the average level for the sample of cottonwoods and longan honey trade in the City of Semarang respectively 2,11% and 2,59%. The average level of sucrose from twelve samples meet requirements but the there are two samples that does not comply requirement of honey based on SNI-2004. There was no significant difference between the levels of sucrose honey cottonwoods and honey longan from beekeepers and honey trade in the City of Semarang

Uji Aktivitas Antioksidan Ekstrak Etanolik Herba Alfalfa (Medicago Sativa L.) Dengan Metode Dpph (1,1-difenil-2-pikrilhidrazil)

Alfalfa (Medicago Sativa L.) plant is known to have compounds of flavonoid and vitamine C which can serve as antioxidants. This research aims knowing the antioxidant activity of alfalfa herbal ethanolic extract using DPPH (1,1-diphenyl-2-pikrilhydrazil method and knowing the content of its active compound have wan. The research was performed by making alfalfa herbal ethanolic extract by maceration method using ethanol extracting solvent 70%. The extract was divided into some concentrations of 10, 20, 40 and 80 μg/ml. As a comparison, vitamine C was used with concentrations of 1, 2, 4, and 8 μg/ml. The test of antioxidant activity was conducted by reacting 50 μl of alfalfa herbal ethanolic extract with 4.0 ml DPPH 0.1 mM, then it was measured for the absorbance using visible spectrophotometry with a wavelength of 525 nm. The obtained data was calculated to discover its antioxidant activity. The statistical analysis used was Mann-Whitney test. The IC50 value was gained using probit analysis and the statistical analysis used t-test and to discover the content of active compound in alfalfa herbal ethanolic extract, TLC test was performed. The research result indicated that the alfalfa herbal ethanolic extract had antioxidant activities with alfalfa herbal ethanolic extract IC50 value of 59.339 μg/ml, and standard solution of vitamine C IC50 value of 4.768 μg/ml. The result of statistical test for IC50 indicated an unsignificant difference between alfalfa herbal ethanolic extract and vitamine C. Otherside it could be concluded that the alfalfa herbal ethanolic extract containing flavonoid had antioxidant activities

Hasil Belajar Matematika Dan Pendekatan Realistik Pada Siswa Kelas V

Penelitian ini bertujuan untuk meningkatkan hasil belajar matematika mengenai volume bangun ruang melalui pendekatan Realistik pada siswa kelas V MIN Buaran Tangerang Banten. Subjek penelitian dengan jumlah siswa sebanyak 30 siswa. Metode penelitian tindakan kelas (action research class) yang bertujuan untuk memperbaiki efektivitas dan efisiensi praktik pendidikan di kelas.Peneliti melaksanakan pembelajaran dengan menggunakan Pendekatan Realistik membuktikan dapat meningkatkan hasil belajar matematika siswa kelas V. Teknik pengumpulan data yang digunakan dengan observasi langsung melalui pengamatan langsung terhadap kegiatan pembelajaran yang berlangsung berkenaan dengan kegiatan guru mengajar dan siswa belajar menggunakan pendekatan realistik.Pada penelitian ini menghasilkan temuan bahwa Pendekatan Realistik dapat digunakan sebagai upaya dalam meningkatkan hasil belajar matematika. Pembelajaran matematika di kelas V MIN menjadikan seluruh siswa memahami pokok bahasan lebih bermakna, lebih aktif, mennyenangkan dalam proses pembelajaran. Pelajaran matematika di kelas V MIN Buaran Tangerang dengan menggunakan pendekatan Realistik, telah menunjukkan adanya peningkatan hasil belajar matematika. Terlihat pada siklus I menunjukan adanya peningkatan prosentase pencapaian hasil belajar dengan nilai rata-rata tes pada siklus I siswa yang mendapat nilai minimal 65 baru mencapai 53,33%, sedangkan pada siklus II siswa yang mendapat nilai 65 mencapai 80%.Hasil belajar matematika pada siswa kelas V telah berhasil efektif melalui pendekatan Realistik pada pelajaran matematika tentang Volume Bangun Ruang balok dan kubus

Uji Aktivitas Antioksidan Ekstrak Etanolik Kulit Buah Jeruk Nipis (Citrus Aurantifolia) Dengan Metode Dpph (1,1-difenil-2- Pikrilhidrazil)

Citrus aurantifolia is known contains flavonoid compound and high Vitamin C. One of theeffects of flavonoid and Vitamin C are antioxidant. This research aims to knowing the antioxidantactivity of citrus aurantifolia etanolic extract by using the DPPH (1, 1-difenil-2-pikrilhidrazil) methodand to knowing the active compound that containing whithin.The research was done by making level series of citrus aurantifolia etanolic extract, they were10, 20, 40 and 80 μg/ml. As a standard of comparison was used vitamin C with concentrations 1, 2, 4and 8 μg/ml. As a blank was used DPPH 0,1 mM. The antioxidant activity test was done by the DPPHmethod. The achieved data was counted to know it's antioxidant activity. The statistical analysis wasused T-Test. To know IC50 (Inhibition Concentration)50 was used the probit analysis and to know it'sactive compound content was done an identification with TLC (Thin Layer Chromatography).The result of the research shows that etanolic extract of citrus aurantifolia has antioxidantactivity IC50 about 54,458 μg/ml and 4,768 μg/ml for vitamin C. The statistical test result of antioxidantactivity shows that there is no any significant difference. The TLC result shows that compoundcontained in etanolic extract of citrus aurantifolia are flavonoid and Vitamin C

Uji Kandungan Bakteri Escherichia Coli Pada Air Minum Isi Ulang Dari Depot Air Minum Isi Ulang Di Kabupaten Rembang Testing of Escherichia Coli Bacteria Content in Drinking Water Refill From Drinking Water Refill Depot in Rembang Sub-district

Water refill is water that has through purification processes both Ultraviolet and ionization, by many stages of filtration to obtain clean water, in order to provide human needs. This research performed by Athena, et.al., (2003) to shows that Total Coli and Escherichia coli in high-enough amounts inside water refill from water refill depot (DAMIU) in Jakarta, Tangerang, and Bekasi. There are many efforts related with this water refill that causes DAMIU developed rapidly, so that required monitoring improvement because water is the primary needs of human being. This research aims to identify Escherichia coli bacteria content that exist in drinking water of water refill from DAMIU in Rembang Sub district. This research is survey type, equipped with microbiology test using MPN method (Most Probable Number). The populations are 25 DAMIU in Rembang sub-district. Data analysis performed descriptively. Test, conducted by water refill sampling, which produced by DAMIU in Rembang sub-district. The testing includes: approximation test using Lactosa Broth (LB) medium, confirmation test using Briliant Green Lactose Bile Broth (BGLB) medium, complementary test using Mc. Conkey medium and Gram painting was performed to identify bacteria types using microscope by 100 times magnification, and Biochemistry test that is IMVIC (Indol, Methyl-Red, Voges Proskauer, and Citrat). In water refill which produced by DAMIU in Rembang Sub district, there is 1 sample (4%) with MPN value of E. coli 13/100 ml and Coliform MPN 21/100 ml, does not fulfill the bacteriology requirements of drinking water quality, according to Health Minister Decree No.907/MENKES/SK/VII/2002 : ³The existence of E.Coli bacteria 0/100 ml sample´, while 24 samples has fulfill the requirements, with MPN value of E.Coli and Coliform < 2, so that it safe and ready to consume

Hubungan Antara Sikap Matematika Dan Lingkungan Belajar Terhadap Hasil Belajar Matematika Siswa Kelas V Sekolah Dasar

: This research aims to see the correlation betwen students behaviour toward mathematic and learning circumtances with the mathematic result. This research is a survey study which imples regression and multiple correlation technique. The research was done at SDN 03 elementary school, Puspanegara Bogor with n = 40 used random sampling technique. The research result are (1) there positive correlation between students behaviour throught the mathematic result. (2) there is positive correlation between learning circumtances and the mathematic results. (3) there is positive correlation between students behaviour toward mathematic and learning circumtances all together toward mathematic result. According to the research results, the mathematic results can be improved by improving students behaviour toward mathematic and positive learning circumtances

Perbandingan Metode Spektrofotometri Ultraviolet (Uv) Dan Kromatografi Cair Kinerja Tinggi (Kckt) Pada Penetapan Kadar Natrium Diklofenak

Beberapa metode analisis telah dikembangkan untuk menentukan kadar natrium diklofenak, diantaranya dengan metode spektrofotometri UV dan KCKT (Kromatografi Cair Kinerja Tinggi). Metode spektrofotometri UV dan KCKT masing-masing mempunyai kelebihan dan kekurangan. Oleh karena itu, penelitian ini bertujuan untuk mengetahui perbandingan kadar natrium diklofenak secara spektrofotometri UV dan KCKT dalam hal ketepatan, ketelitian dan sensitivitas. Penetapan kadar natrium diklofenak dianalisis dengan metode spektrofotometri UV dengan melakukan penentuan panjang gelombang maksimal, penentuan operating time, pembuatan kurva baku, pengukuran serapan sampel, perhitungan kadar natrium diklofenak dalam sampel. Sedangkan metode KCKT dengan melakukan optimasi instrumen dan optimasi fase gerak, identifikasi natrium diklofenak dalam sampel, pembuatan kurva baku, pengamatan kromatogram sampel, perhitungan kadar natrium diklofenak dalam sampel. Pelarut yang digunakan adalah aquabidestilata dan fase gerak yang digunakan adalah campuran asetonitril dan buffer fosfat 0,01 M pH 3,5. Sedangkan fase diam yang digunakan adalah Oktadesil Silikat (ODS) C18 (4,6x150mm). Data kadar yang diperoleh dari masing-masing metode dibandingkan ketepatan, ketelitian dan sensitivitas dari dua metode tersebut. Hasil penelitian menunjukkan bahwa kadar rata-rata natrium diklofenak secara Spektrofotometri UV adalah 17,9 µg/ml. Sedangkan secara KCKT adalah 17,3 µg/ml. Kadar rata-rata natrium diklofenak dalam sampel secara spektrofotometri UV dan KCKT memenuhi persyaratan Farmakope Indonesia yaitu memiliki nilai rekoveri yang masih dalam range 90,0 % -110 % dan memiliki nilai CV < 5%. Akan tetapi metode KCKT memiliki sensitivitas yang lebih tinggi dibandingkan metode Spektrofotometri UV

Asesmen Dan Intervensi Pedagogik Dalam Membangun Generasi Emas Ditinjau Dari Perspektif Pengembangan Kreativitas Siswa Kelas Awal Sekolah Dasar

This study intendsto expla in the importance of educating the interventionasesmentand learning in the early grades of primary school, We have to consider thecharacteristics of the development of elementary schoolage. Intervention can bed onewith athemeapproach, this approach is also based on the consideration ofdevelopmentally appropriatepractice. Alternative assess mentwould be suitableto monitorthe development of students' creativity. Theme as an intervention approach thatrequiresattention, especially the abilityto educate primary school education for skilledcollaborate. Keyword: Intervention, assessment, creativity, early grade of primary education. Penelitian ini bertujuan untuk menjelaskan pentingnya mendidik asesmentintervensi dan belajar di kelas-kelas awal SD. Kita harus mempertimbangkankarakteristik perkembangan usia SD. Intervensi bisa dilakukan dengan pendekatan tema,pendekatan ini juga didasarkan pada pertimbangan praktik sesuai dengan tahapanperkembangan. penilaian alternatif akan cocok untuk memantau perkembangankreativitas siswa. Tema sebagai pendekatan intervensi yang membutuhkan perhatian,terutama kemampuan untuk mendidik pendidikan sekolah dasar untuk berkolaborasiterampil.Keyword : Intervensi, penilaian, kreativitas, kelas awal pendidikan dasar