cover
Contact Name
Susi Nurul Khalifah
Contact Email
susikhalifah@gmail.com
Phone
-
Journal Mail Official
alchemy@uin-malang.ac.id
Editorial Address
-
Location
Kota malang,
Jawa timur
INDONESIA
ALCHEMY
ISSN : -     EISSN : -     DOI : -
Alchemy Journal of Chemistry ini diterbitkan oleh Jurusan Kimia Fakultas Sains dan Teknologi UIN Maulana Malik Ibrahim Malang secara berkala 2 kali setahun pada bulan Maret dan Oktober.
Arjuna Subject : -
Articles 5 Documents
Search results for , issue " ALCHEMY (Vol 2 No 1" : 5 Documents clear
ISOLASI DAN IDENTIFIKASI SENYAWA AKTIF EKSTRAK AIR DAUN PAITAN (THITONIA DIVERSIFOLIA) SEBAGAI BAHAN INSEKTISIDA BOTANI UNTUK PENGENDALIAN HAMA TUNGAU ERIOPHYIDAE M., Taufiq,
ALCHEMY ALCHEMY (Vol 2 No 1
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi UIN Maulana Malik Ibrahim Malang

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

Abstract

Telah dilakukan penelitian tentang isolasi, uji fitokimia dan uji toksisitas ekstrak air Daun Paitan (Thitonia diversifolia) terhadap Hama Tungau Eriophyidae. Al-Qur´an surat Al An’am (6), ayat 141 dan surat Al Ankabut (29), ayat 30, yang menunjukkan adanya tanaman yang bermanfaat untuk difikirkan oleh para peneliti supaya dapat dimanfaatkan secara maksimal. Penelitian ini bertujuan untuk mengetahui senyawa aktif yang terkandung pada ekstrak air Daun Paitan. Tujuan kedua yaitu untuk mengetahui tingkat toksisitas dari ekstrak air Daun Paitan (Thitonia diversifolia) terhadap pertumbuhan Hama Tungau Eriophyidae. Ekstraksi Daun Paitan (Thitonia diversifolia) dilakukan dengan pelarut air. Metode ekstraksi yang digunakan yaitu ekstraksi maserasi selama 48 jam dan. Ekstrak pekat diuji toksisitasnya terhadap Hama Tungau Eriophyidae, diuji kandungan fitokimia menggunakan reagen dan dianalisa lebih lanjut menggunakan Kromatografi Cair Kinerja Tinggi (KCKT). Data kematian Hama Tungau Eriophyidae dianalisis dengan analisis probit untuk mengetahui nilai LC50. Hasil penelitian menunjukkan ekstrak air Daun Paitan (Thitonia diversifolia) memiliki tingkat toksisitas terhadap Hama Tungau Eriophyidae, yang ditunjukkan dengan nilai LC50 kurang dari 1000 ppm. Nilai LC50 masing-masing perlakuan adalah 3,9163 ppm, 3,1784 ppm dan 2,2922 ppm, sehingga yang memiliki bioaktivitas tertinggi terhadap Hama Tungau Eriophyidae adalah 2,2922 ppm, yaitu pada perlakuan selama 72 jam. Hasil uji fitokimia menunjukkan adanya golongan senyawa flavonoid, alkaloid dan tanin, sedangkan hasil dari analisa HPLC menunjukkan kromatogram dengan 4 puncak yang diduga senyawaan flavonoid, alkaloid dan juga tanin, dengan waktu tambat 9,55; 10,86; 12,16; 17,36 menit. Hal ini menunjukkan adanya manfaat tanaman yang telah disebutkan dalam Al-Qur’an, sehingga dapat digunakan sebagai acuan bahwa tumbuhan Paitan (Thitonia diversifolia) berpotensi sebagai bahan insektisida botani yang sangat ekonomis.
UJI EFEKTIVITAS DAN IDENTIFIKASI SENYAWA EKSTRAK BIJI SIRSAK (ANNONA MURICATA LINN.) YANG BERSIFAT BIOAKTIF INSEKTISIDA NABATI TERHADAP HAMA THRIPS P., Mulyawati, A.
ALCHEMY ALCHEMY (Vol 2 No 1
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi UIN Maulana Malik Ibrahim Malang

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

Abstract

Annona muricata grow widespread and they are known as herbal insecticides. The aim of this experiment is to: 1) evaluated of crude extracts against thrips pest and 2) known insecticides chemical compounds from crude extracts Annona muricata seeds. These extract with the concentration of 5 mg ekstrak/L air, 10 mg ekstrak/L air, 20 mg ekstrak/L air, 40 mg ekstrak/L air, and 80 mg ekstrak/L air were added to the thrips pest was had red bended at Jatropha curcas. Polysulfides and combine water dan detergen were used as positive control and negative control, respectively. Thrips pest were observed in 120 hours after spraying completed random program. Identification of insecticides bioactive compunds from crude extract Annona muricata seeds using thin layer chromatography (TLC), phytochemical analysis spectrofometer FTIR and Chromatography Gas-Spectra Mass (GC-MS). The result showed each concentration of crude extracts Annona muricata seeds have toxicity at thrips pest were showed in LC < 1000 mg extract/L air, exactly 16,9272 mg ekstrak/L water in 120 hours after spraying. Concentration 40 mg extract/L water in 72 hours  have kill 39,2%, is not significant difference with 80 mg extract/L water 44,4 % of mortality. Phytochemical analysis secondary metabolite and separatoring acetogenin compounds using analitic TLC done give negative result. The result identivication of FTIR and gas chromatograph-mass spectra (GC-MS) is unsaturated carboxilic acid; linoleic acid, octadecanoic acid, palmitic acid and 2furancarboxaldehide.
ISOLASI AN IDENTIFIKASI KITIN, KITOSAN DARI CANGKANG HEWAN MIMI (HORSESHOE CRAB) MENGGUNAKAN SPEKTROFOTOMETRI INFRA MERAH Rifai, Dewi Nur Rizqiyah
ALCHEMY ALCHEMY (Vol 2 No 1
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi UIN Maulana Malik Ibrahim Malang

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

Abstract

Penelitian tentang pengisolasian kitin telah banyak dilakukan pada cangkang rajungan dan cangkang udang. Konsentrasi reagen yang digunakan untuk mengisolasi kitin pada cangkang rajungan dan cangkang udang berbeda. Dilihat dari segi kekerasan cangkangnya, cangkang hewan mimi lebih keras dari pada cangkang rajungan dan cangkang udang sehingga perlu dilakukan metode isolasi kitin dari cangkang hewan mimi yang sesuai.  Metode penelitian yang digunakan pada penelitian ini ada 3 tahap. Pertama deproteinasi dengan variasi konsentrasi reagen NaOH 3,5 %, 4,5 %, 5,5 %, 6,5 % dan 7,5 %, kedua demineralisasi dengan variasi konsentrasi reagen HCl 1 M, 1,5 M, 2 M, 2,5 M, dan 3 M, ketiga deasetilasi dengan konsentrasi NaOH 50 %. Uji karakteristik kitin dan kitosan hasil isolasi dilakukan dengan IR.  Hasil penelitian menunjukkan bahwa konsentrasi optimum reagen NaOH pada proses deproteinasi sebesar 4,5 % dengan konsentrasi optimum protein yang dilepaskan sebesar 601 ppm. Konsentrasi optimum reagen HCl pada proses demineralisasi adalah 2,5 M dengan kadar abu yang tersisa dalam kitin sebesar 0,972 %. Derajat deasetilasi (D%) kitin sebesar 45,4 % sedangkan kitosan 50,5 %.
DENTIFICATION AND TOXICITY TEST OF CITRONELLAL FROM CYMBOPOGON NARDUS LEAFS AS ANTIFEEDANT OF TOWARD THRIPS IN JATROPHA CURCAS M, Iqbal Fikri
ALCHEMY ALCHEMY (Vol 2 No 1
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi UIN Maulana Malik Ibrahim Malang

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

Abstract

The aim research is to identification citronellal compound from Cymbopogon nardus  leafs using gas chromaatograph – mass spectra (GC-MS) and showes variation consentration and time contack of citronellal compounds at toxicity test of thrips pest at Jatropha curcas using variation concentration. The result of fractioned destilation get 3 fractions; fraction I (2-110-C), fractions II (111-128 C) and fraction III (128-130o C) have same property with citronellal. Identification result of GC-MS showed that citronellal concentrated in fraction was 13 %. Toxicity testing given not significant different. At concentrate 40 mL/ L of citronellal in water destilat have contact poison because have kille thrips pest 85 % at 24 hours. But, at concentrate 5 ml/L, 10 ml/L, dan 20 ml/L air of citronellal in work as stomact poison, because just can kill less 50 % thrips pest at 24 hours after observed mortality value is 21,6 %, 8 % and 40 %.Key word: Identification, citronellal, cymbopogon, jatropha.
EFFECT OF TEMPERATURE, PH ON TOTAL CONCENTRATION AND COLOR STABILITY OF ANTHOCYANINS COMPOUND EXTRACT ROSELLE CALYX (HIBISCUS SABDARIFFA L.) R, Hermawan
ALCHEMY ALCHEMY (Vol 2 No 1
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi UIN Maulana Malik Ibrahim Malang

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

Abstract

Recently, Roselle (Hibiscus sabdariffa L.) has been known as communities used for tea, rather than based on this background, research was conducted with the aim: (1) To determine the rate of anthocyanin degradation due to the influence of heating and color stability extract roselle calyx (Hibiscus sabdariffa L.), (2) To determine the stability of anthocyanin due to the influence of pH on total anthocyanin extract compounds and color roselle calyx (Hibiscus sabdariffa L.) during the storage process.  This research was conducted by extracting the sample with citric acid 2% solvent. Concentrated extract was used to test the stability of the heating temperature, test the stability of pH during the storage process for ± 30 days and color change.  The results of this study indicate that extracts of roselle calyx (Hibiscus sabdariffa L.) experienced a decrease in concentration at 80 °C. Concentration of anthocyanin degradation rate followed the equation r = 0.014T – 1.169 with the lowest concentration value of 32.916 mg / L. The intensity of color produced due to the influence of heating at 80 °C with varying time is 29.6 to 30.7 for the parameters of brightness (L *), 23.9 to 20.7 redness (a *), and 13.5 - parameter 15 for yellow (b *) increased. The intensity of color produced due to the influence of pH variation during the storage process is 27.5 to 26.2 for L * values decreased on average instead of L * at different pH average value increased from 27.5 to 39.7 . The result of reading the value of a * decreased with increasing storage time and reduced levels of acidity, namely from 22.7 to 18.3 and from 22.7 to 9.7. While reading the value of b * along with increasing storage duration has decreased and has decreased with the reduction in the level of acidity, namely from 11.8 to 10.9 and from 11.8 to 13.8.  Keywords: Roselle (Hibiscus sabdariffa L.), anthocyanins, degradation, temperature, pH, color

Page 1 of 1 | Total Record : 5