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INDONESIA
CHEMPUBLISH JOURNAL
Published by Universitas Jambi
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Core Subject : Science, Engineering,
Chemical Engineering, Chemistry & Bioengineering Chemistry
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Articles 126 Documents
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Studi aktivitas ekstrak etanol dan sediaan gel daun melinjo (Gnetum gnemon L) sebagai antibakteri terhadap Staphylococcus Aureus Indra Lasmana Tarigan; Afidatul Muadifah; Helda Wika Amini; Tri Kurnia Astutik
CHEMPUBLISH JOURNAL Vol. 4 No. 2 (2019): Chempublish Journal
Publisher : Universitas Jambi, Fakultas Sains dan Teknologi, Program Studi Kimia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/chp.v4i2.7631

Abstract

Melinjo (Genus Gnetii gnemonii Folium) merupakan spesies tanaman yang berasal dari semenanjung Malaysia dan Indonesia, diketahui memiliki senyawa bioaktif yang dapat dimanfaatkan dibidang kesehatan. Tujuan penelitian ini ini adalah untuk menganalisis profil senyawa bioaktif daun melinjo (Gnetii gnemonii Folium) yang memiliki fungsi sebagai antimikroba dengan menghambat pertumbuhan bakteri Staphylococcus aureus serta memformulasi gel dari ekstrak daun melinjo. Ekstrak daun melinjo dibuat dengan metode maserasi menggunakan pelarut etanol 70%, 3 hari. Analisis profil senyawa bioaktif daun melinjo menggunakan skrining fitokimia dan pengujian aktivitas antibakteri dilakukan menggunakan metode difusi cakram Kirby-Bauer terhadap Staphylococcus aureus. Konsentrasi ekstrak etanol daun melinjo yang digunakan interval konsentrasi 50%-80%. Ekstrak dengan konsentrasi optimum diformulasikan dalam bentuk gel dan dilakukan evaluasi mutu fisik sediaan gel meliputi organoleptis, uji homogenitas, uji pH, uji daya lekat dan uji daya sebar selama 28 hari. Hasil analisis menunjukkan senyawa bioaktif daun melinjo meliputi Tanin, Saponin, Alkaloid, Flavonoid, dan Triterpenoid. Ekstrak 80% daun melinjo memberikan efek antibakteri dengan zona hambat terbesar 13,08mm. Gel dari ekstrak daun melinjo 80% memberikan efek antibakteri dengan kategori kuat terhadap bakteri Staphylococcus aureus dengan diameter zona hambat sebesar 16,91mm.
Studi karakteristik sintesis bioplastik menggunakan bahan dasar ubi kayu dengan variasi penambahan selulosa nanas dan pengadukan Idral Amri; khairani; Irdoni
CHEMPUBLISH JOURNAL Vol. 4 No. 2 (2019): Chempublish Journal
Publisher : Universitas Jambi, Fakultas Sains dan Teknologi, Program Studi Kimia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/chp.v4i2.7649

Abstract

Bioplastic or biodegradable plastics are polymers that are composed of organic monomers found in starch and cellulose. The purpose of this research is to make bioplastics with use of raw material starch cassava and cellulose filler pineapple leaves, by varying the speed of stirring and the number of fillers, as well as knowing the nature of the bioplastic mechanics (Modulus Young, Elogenasi , Strong tensile), biodegradability, morphology and site. The methods on this research started from the preparation of raw materials, the manufacture of cellulose pineapple, the manufacture of cassava starch and the manufacture of bioplastics. The concentration of fillers used in the study was 0.3 grams, 0.6 grams, 0.9 grams, 1.2 grams and 1.5 grams in every 10 grams of starch, stirring variations of 200 rpm and 300 rpm. And obtained the best results in this study is bioplastic which has a strong tensile 13.24 Mpa, elongation 5.16%, modulus young 1072.83 Mpa, biodegrability of the land for 7 days, site 33.33%, obtained at a concentration of 1.5 grams cellulose and pineapple Stirring 300 rpm.
Sintesis dan karakterisasi fotokatalis ZnO/karbon aktif dan aplikasinya pada degradasi rhodamin B Restina Bemis; Nelson; Ngatijo; Siti Nurjanah; Nur'aini Maghviroh
CHEMPUBLISH JOURNAL Vol. 4 No. 2 (2019): Chempublish Journal
Publisher : Universitas Jambi, Fakultas Sains dan Teknologi, Program Studi Kimia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/chp.v4i2.7936

Abstract

Telah dilakukan sintesis dan karakterisasi ZnO/karbon aktif sebagai fotokatalis untuk mendegradasi rhodamin B. Fotokatalis ZnO/karbon aktif disintesis menggunakan motode solid state menggunakan prekursor Zn(NO3)2.4H2O dan karbon aktif dari tempurung kelapa. Pola difraksi XRD menunjukkan bahwa fotokatalis ZnO/karbon aktif memiliki struktur heksagonal wurzite yang sesuai dengan standar COD- Inorg No. 96-900-4180 dengan kristal berukuran 0,12 µm. Hasil UV-Vis menunjukkan ZnO memiliki nilai energi celah pita (band gap energy, Eg) sebesar 3,12 eV dan hasil SEM menunjukkan morfologi permukaan berbentuk tidak beraturan dan mangalami mengalami aglomerasi. Analisis EDS pada ZnO dan ZnO/karbon aktif memberikan persentase massa elemen Zn= 59,4%; O= 38,6% dan Zn= 66,9%; O=23,6%; C=7,8%. Hasil uji aktivitas fotokatalitik menunjukkan bahwa kondisi optimum degradasi rhodamin B 10 ppm memerlukan 200 mg fotokatalis ZnO/karbon aktif dan waktu radiasi sinar UV selama 90 menit. Fotokatalis ZnO/karbon aktif efektif dalam mendegradasi zat warna rhodamin B pada kondisi optimumnya dengan persentase degradasi sebesar 86,84%. Dari data analisis LC-MS menunjukkan terjadi degradasi molekul rhodamin B (m/z= 442,88) membentuk senyawa intermediet dengan perbandingan rasio massa dan muatan sebesar 387,30; 359,01; 331,12; 132,79 dan 117,03 m/z.
Potensi metabolit sekunder produksi bakteri endofit dari tumbuhan laban (Vitex pubescens Vahl) sebagai antikanker Lenny Anwar; Dedi Futra
CHEMPUBLISH JOURNAL Vol. 4 No. 2 (2019): Chempublish Journal
Publisher : Universitas Jambi, Fakultas Sains dan Teknologi, Program Studi Kimia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/chp.v4i2.7937

Abstract

Peran mikroba endofit dalam memproduksi metabolit sekunder dengan kualitas yang hampir sama dengan tanaman aslinya sangat potensial untuk dikembangkan. Penelitian ini bertujuan untuk menyelidiki bakteri endofit yang terdapat didalam jaringan kulit batang Laban (Vitex pubescens Vahl) serta kemampuannya untuk memproduksi metabolit bioaktif yang mempunyai aktivitas sitotoksik. Dalam penelitian ini digunakan teknik inokulasi langsung dengan jalan meletakkan sampel tanaman di atas permukaan Nutrient Agar (NA). Metoda Micro tetrazolium (MTT) digunakan untuk menetapkan aktivitas sitotoksik dari ekstrak etilasetat. Bakteri endofit yang berhasil diisolasi sebanyak 3 isolat yaitu Bakteri-2A, Bakteri -3B dan Bakteri-6C. Berdasarkan hasil penapisan dari 3 isolat tersebut didapatkan dua bakteri yang memiliki aktivitas potensial yang baik terhadap sel serviks (HeLa) yaitu isolat Bakteri – 6C (IC50 = 82.54 µg/mL) dan Bakteri-2A (IC50 = 297.09 µg/mL). Isolat yang menunjukkan aktivitas sitotoksik terbesar adalah isolat Bakteri-6C sehingga dapat disimpulkan bahwa isolat tersebut merupakan isolat yang paling potensial sebagai penghasil senyawa antikanker.
Pengaruh penambahan kitosan sisik ikan papayu (Anabas testudienus) terhadap sifat kimia, mekanik dan struktur morfologi pada edible film pati jagung Yuli Ristianingsih; Maria Natalia
CHEMPUBLISH JOURNAL Vol. 4 No. 2 (2019): Chempublish Journal
Publisher : Universitas Jambi, Fakultas Sains dan Teknologi, Program Studi Kimia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/chp.v4i2.7959

Abstract

Edible film adalah lapisan tipis yang terbuat dari bahan yang dapat dikonsumsi dan digunakan untuk melapisi makanan sebagai penghalang terhadap transfer massa seperti kelembapan, oksigen, aroma, pembawa aditif seperti mikrobial dan lemak. Jenis polisakarida yang dapat digunakan sebagai bahan baku pembuatan edible film adalah pati dan kitosan. Bahan baku pembuatan edible film yang digunakan pada penelitian ini adalah pati jagung, gliserol sebagai plasticizer dan kitosan ikan papuyu. Ikatan molekul antara pati jagung dan kitosan mempengaruhi kuat tarik edible film. Hal ini dapat dilihat pada uji FTIR dan kuat tarik. Tujuan penelitian ini adalah untuk mengetahui sifat kimia, mekanik dan struktur morfologi edible film dengan variasi kitosan ikan papuyu (0,5%; 1%; 1,5% dan 2%). Analisis yang telah dilakukan diketahui bahwa sifat kimia edible film melalui analisa gugus fungsional (FT-IR) menunjukkan bahwa edible film mengandung gugus OH (pati) dan C=H (kitosan). Analisis kuat tarik menunjukkan bahwa penambahan kitosan mampu meningkatkan nilai kuat tarik edible film dengan nilai maksimum kuat tarik 14,5 MPa. Nilai elastisitas pada kosentrasi kitosan 2% mengalami penurunan dan nilai maksimum EAB 6,3%. Struktur morfologi pada edible film pada konsentrasi kitosan 2% diketahui bahwa kitosan tercampur merata. Kuat tarik dan struktur morfologi merupakan aspek yang penting dalam edible film untuk menentukan kualitas bahan pengemas sebelum dikomersilkan.
Sintesis dan karakterisasi magnetit terlapis dimerkaptosilika Abdurrazaq Habib; Ngatijo; Diah Riski Gusti
CHEMPUBLISH JOURNAL Vol. 4 No. 2 (2019): Chempublish Journal
Publisher : Universitas Jambi, Fakultas Sains dan Teknologi, Program Studi Kimia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/chp.v4i2.8034

Abstract

Synthesis of dimerkaptosilica coated magnetite was carried out in several stages, namely synthesis of magnetite from FeCl3.6H2O and FeSO4.7H2O by coprecipitation method. Extraction of sodium silicate from rice husk ash as a source of silica. Coating magnetite by dimerkaptosilica using 2,3-dimercapto-1-propanol as a source of mercapto groups and sodium silicate as sources of silica. Coating is done by the sol-gel method. FTIR characterization showed the appearance of uptake at wave numbers 894,04 cm-1, 2951,22 cm-1 and 3655,26 cm-1 from several absorbances which also appeared in magnetite material spectra indicating ―SH, ―CH2 and ―OH groups. XRD characterization was characterized by the appearance of a peak at 2θ, which was 35,43° and SEM characterization showed that the material Fe3O4―DMS had a morphological shape in the form of round clumps forming gray-colored aggregates.
Pembuatan Plastik Biodegradable dari Pati biji Durian dan Pati Biji Nangka yelmira zalfiatri; Rozikhin; Farida Hanum Hamzah
CHEMPUBLISH JOURNAL Vol. 5 No. 2 (2020): Chempublish Journal
Publisher : Universitas Jambi, Fakultas Sains dan Teknologi, Program Studi Kimia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/chp.v5i2.7988

Abstract

Durian seeds and jackfruit seeds are agricultural waste containing high starch, which can be used as raw material for biodegradable plastic. The purpose of this research was to get the best formulation on the making of biodegradable plastic based on starch of durian seed and starch of jackfruit seed with addition of beeswax. This research was conducted experimentaly by using complete randomized design (CRD) which consists of five treatments and three replications, thus analysis of variance (ANOVA) and followed by Duncan’s New Multiple Range Test (DNMRT) at level 5%. The treatments in this research were P1 (starch of jackfruit seed 5%), P2 (starch of durian seed 1,25% : starch of jackfruit seed 3,75%), P3 (starch of durian seed 2,5% : starch of jackfruit seed 2,5%), P4 (starch of durian seed 3,75% : starch of jackfruit seed 1,25%), and P5 (starch of durian seed 5%) in formulation of biodegradable plastic. The best treatment was P2 which has a thickness of 0,76 mm, water resistance of 59,19%, water vapor transmission rate of 4,53 g/cm2/h, tensile strength of 21,57 MPa, and elongation of 6,58%.
Perbandingan Penambahan CMC dan Sorbitol dengan Penambahan Gelatin dan Gliserol terhadap Edible Film yang Terbuat dari Limbah Cair Tahu Hadistya Suryadri
CHEMPUBLISH JOURNAL Vol. 5 No. 2 (2020): Chempublish Journal
Publisher : Universitas Jambi, Fakultas Sains dan Teknologi, Program Studi Kimia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/chp.v5i2.8872

Abstract

The large number of small tofu industries do not have liquid waste treatment encourage the utilization of their whey become raw of edible film because its protein content. However using only protein as a raw material of edible film resulting brittle, fragile and rigid films. Accordingly, the addition of hydrocolloids such as CMC or gelatin to repair film structure and also addition of plasticizers such as sorbitol and glycerol to improve film elasticity. The aim of this study to determine the effect of ratio concentration CMC-Sorbitol and Gelatin-Glycerol from 1% : 1%, 1% : 3%, 1% : 5%, 3% : 1%, 3% : 3%, 3%: 5%, 5% : 1%, 5% : 3% to 5% : 5% (weight/volume) on the physical properties of whey based films. Film resulted good properties in accordance with the Japan Industrial Standard at using ratio CMC-Sorbitol 1%:3% and ratio Gelatin-Glycerol 3%:3%. Appearance of film with addition of Gelatin-Glycerol 3%:3% relatively more transparent and smooth compared to film with addition of CMC-Sorbitol 1%:3%. Micrograph of CMC-Sorbitol 1%:3% film surfaces observed rough and many cracks and very irregular in structures.
Penentuan Kandungan Etanol dalam Makanan dan Minuman Fermentasi Tradisional Menggunakan Metode Kromatografi Gas dhony hermanto
CHEMPUBLISH JOURNAL Vol. 5 No. 2 (2020): Chempublish Journal
Publisher : Universitas Jambi, Fakultas Sains dan Teknologi, Program Studi Kimia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/chp.v5i2.8979

Abstract

Determination of alcohol content in food and beverage is needed for halal verification. Ethanol content in various food and beverage traditional products from fermentation was determined using the gas chromatography method with ethanol as standart and n-buthanol as internal standart. As comparison, measurement using alcohol meter were conducted. The GC measurement result were also compared with alcohol content printed on the packaging (value declared by the producer). The result showed that linear range in ethanol concentration was 1-10% with correlation coefficient (r) of 0.9984, indicated that GC has excellent linearity. Limit of detection was 0,5 ng, coefficient variance (CV) was ≤ 2%, accuracy (K) was ≤ 5% and recovery was > 2%, indicated that GC method has high sensitivity, accuracy, validity and recovery. Alcohol content in beer samples listed in the packaging was confirmed with GC measurement results. Anova test results showed that the GC methods with alcohol meter methods did not differ significantly so that the GC and alcohol meter methods can be used as a good alternative in determining the ethanol content in fermented foods and beverages as a support in halal verification.
Pengaruh Lama Penyimpanan Ikan Sarden Kemasan Kaleng terhadap Kadar Logam Pb dan Cu Refilda Suhaili
CHEMPUBLISH JOURNAL Vol. 5 No. 2 (2020): Chempublish Journal
Publisher : Universitas Jambi, Fakultas Sains dan Teknologi, Program Studi Kimia

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

Abstract

ABSTRACT Canned sardines (Sardinella sp.) are very practical because they can be stored for a long time and can reduce contamination of bacteria and microorganisms from outside. However, direct contact with canned packaging for a long time can cause heavy metal contamination. Therefore, heavy metal concentrations of Pb and Cu from canned sardines (Sardinella sp.) were determined by Atomic Absorption Spectrophotometry (AAS) method. Samples of canned sardines (Sardinella sp.) digested using a mixture of concentrated HNO3 and 15% H2O2 (3:1). The samples tested were canned sardines with a storage time of 36 months (A), 18 months (B) and 6 months (C) after production. The results of Pb metal analysis of canned sardines (Sardinella sp.) in samples A, B, and C were 0.807 mg/L; 0.512 mg/L; and 0.387 mg/L. The concentration of Pb metal obtained in all samples exceeded the threshold value set by BPOM, at 0.3 mg/L. The concentration of Cu in samples A, B, and C were 2.718 mg/L; 1.996 mg/L; and 1.240 mg/L respectively . The concentration of Cu in all samples was still below the limit set by BPOM at 5 mg/L. The t-test statistic showed that there were significant differences in the concentration of Pb and Cu metals for the three types of samples (t-count>t-table). It can be concluded that storage time affects the concentration of Pb and Cu metals in canned sardines (Sardinella sp.). The longer sardines were stored in cans, the Pb and Cu metal concentrations would increase.

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