Jurnal Online Universitas Muhammadiyah Purwokerto
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PENETAPAN KADAR TANIN DALAM INFUSA DAUN SALAM (Syzygium polyanthum (Wight.) Walp)) SECARA SPEKTROFOTOMETRI SINAR TAMPAK
Full text linkABSTRAK
Salah satu tanaman yang digunakan oleh masyarakat sebagai obat tradisional adalah salam (Syzygium polyanthum (Wight.) Walp). Tanin diketahui sebagai salah satu bahan aktif yang terkandung dalam daun salam dan sering digunakan untuk mengatasi masalah diare. Penelitian ini bertujuan untuk mengetahui kadar tanin pada daun salam dengan umur daun yang berbeda. Daun salam muda dan daun salam tua diambil sebagai sampel. Penyarian tanin dari sampel daun dilakukan secara infundasi. Kadar tanin dalam infusa yang diproleh ditetapkan dengan metode spektrofotometri ultraviolet-visibel dengan menggunakan pereaksi Folin Denis dan natrium karbonat jenuh yang akan menghasilkan warna biru. Panjang gelombang maksimum yang digunakan adalah 745,0 nm. Kadar tanin yang diperoleh pada daun salam muda dan daun salam tua berturut-turut sebesar 0,036±1,513% dan 7,07.10-3±0,288%. Dari uji t dengan taraf kepercayaan 95% diperoleh hasil bahwa terdapat perbedaan kadar tanin yang signifikan antara daun salam tua dan muda.
Kata Kunci : tanin, daun salam, infusa, spektrofotometri ultra violet-visibel.
Abstract
People used many traditional medicinal plants. One of them is leaf of salam (Syzygium polyanthum (Wight.) Walp). One of its active compound is tannin that used to treat diarrhoae. The aim of this research was to determine tannin content of salam leaves from different age. Sample that used in this research were young and old salam leaves. Infundation method was used to extract tannin from salam leaves. Tannin content of the infusion was determined by ultraviole-visible spectrophotometry with addition of Folin Denis reagent. Maximum wavelength was 745.0 nm. The result of tannin content in young and old salam leaves were 0.036±1.513% and 7.07x10-3±0.288% respectively. t test showed that there were differences of tannin content in young and old salam leaves.
Keywords: tannin, salam leaf, infusion, ultraviolet-visible spectrophotometr
PENGARUH SUPERVISI AKADEMIK, KOMPETENSI GURU DAN KEDISIPLINAN TERHADAP KINERJA GURU SMA NEGERI 3 SLAWI KABUPATEN TEGAL
Full text linkThis research is aimed at finding out the impact of academic supervision, teacher’s competence, and discipline towards the performance of teachers of SMA Negeri 3 Slawi, Tegal. This research used survey method. The data was collected using questionnaire and observation. There were 52 teachers as respondents. The data analysis used was percentage, multiple linear regression, F test and t test. The finding was : 1) academic supervision, teacher’s competence and discipline of SMA 3 Slawi teachers were very good, 2) academic supervision, teacher’s competence, and discipline together had impact towards teachers’ performance, 3) academic supervision, teacher’s competence, and discipline separately had impact on teachers’ performance, and 4) discipline had the strongest impact towards teachers’ performance. With this result it is suggested that the Diknas (the regential ministry of education) intensify the academic supervision, continually developing teacher’s competence, and enforcing discipline on teachers and schools.
Key words: academic supervision, competence, discipline, teacher’s
performanc
ANALISIS KUALITATIF PARASETAMOL PADA SEDIAAN JAMU SERBUK PEGAL LINU YANG BEREDAR DI PURWOKERTO
Full text linkABSTRAK
Telah dilakukan penelitian tentang analisis kualitatif parasetamol pada sediaan jamu serbuk pegal linu yang beredar di Purwokerto. Penelitian ini dimaksudkan untuk mengidentifikasi parasetamol dalam ramuan jamu tradisional pegal linu. Metode yang digunakan adalah kromatografi lapis tipis (KLT). Fase gerak yang digunakan pada KLT adalah kloroform:etil asetat (6:4) dengan penampak bercak ferri klorida. Hasil KLT dan menunjukkan bahwa pada sediaan jamu serbuk pegal linu tersebut tidak mengandung parasetamol.
Kata kunci: jamu serbuk pegal linu, parasetamol, KLT
ABSTRACT
A study concerning the qualitative analysis of paracetamol in traditional herbs powder for relieving stiff and muscle pain circulating in Purwokerto. This study aimed to identify paracetamol in traditional herbs for relieving stiff and muscle pain. The method used is a thin-layer chromatography (TLC). The mobile phase used in TLC was chloroform: ethyl acetate (6:4) with ferric chloride reagen for spot detection. TLC and the results showed that the traditional herbs powder for relieving stiff and muscle pain does not contain paracetamol.
Keywords: traditional herbs powder for relieving stiff and muscle pain, paracetamol, TL