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INDONESIA
CHEMISTRY PROGRESS
Published by Universitas Sam Ratulangi
ISSN : 19795920     EISSN : 27158365     DOI : -
Core Subject : Science,
Chemistry
Majalah Ilmiah Chemistry Progress merupakan media untuk menyebarkan informasi ilmiah dan sarana komunikasi bagi para ilmuan dan cendekiawan melalui tulisan-tulisan ilmiah. Majalah Ilmiah Chemistry Progress terbit dua nomor dalam satu tahun (Mei dan November) berisi kajian penelitian dalam lingkup ilmu kimia (organik, anorganik, analitik, biokimia, fisika, bahan alam, lingkungan, pangan, kelautan, pertambangan, farmasi dan komputasi). Jumlah halaman pervolume adalah 55-65 halaman.
Arjuna Subject : -
Articles 275 Documents
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ANALISA KANDUNGAN TOTAL ZAT PADAT TERSUSPENSI (TSS) PADA MUARA SUNGAI DI TELUK MANADO Tarumingkeng, Adrie
CHEMISTRY PROGRESS Vol 3, No 2 (2010)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/cp.3.2.2010.18987

Abstract

ABSTRACTTarumingkeng, A. and W. Patty. 2010. Analysis of Total solid suspended at river downstream Manado bay.A research was done to analyze total solid suspended at downstream river, Manado bay. Total solid suspended content was analyzed in nine stations at Malalayang river stream. Total solid suspensions and turbidity of water were analyzed using Horiba U-10. The result shows that the highest total solid suspensions were in station 1, 4 and 7. High total solid suspensions caused by its position near to the land. Total solid suspensions Malalayang river have uncertain trend. Turbidity influence to total solid suspended of Malalayang river.Kata kunci : total solid suspended, turbidity, river, Malalayang
EVALUASI KANDUNGAN TOTAL POLIFENOL DAN ISOLASI SENYAWA FLAVONOID PADA DAUN GEDI MERAH (Abelmoschus manihot L.) Suoth, Elly; Kaempe, Hindang; Tampi, Aryani
CHEMISTRY PROGRESS Vol 6, No 2 (2013)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/cp.6.2.2013.3500

Abstract

Di Sulawesi Utara tanaman Gedi Merah sudah di kenal oleh sebagian masyarakat, karena tanaman ini banyak dijadikan sebagai sayuran. Gedi Merah digunakan sebagai pengobatan alternatif untuk menurunkan kadar kolesterol, hipertensi dan antidiabetes. Penelitian ini bertujuan untuk mengetahui kandungan total polifenol yang terdapat pada daun gedi merah dan mengisolasi serta mengidentifikasi kandungan flavonoid pada daun gedi merah. Setelah dilakukan pengujian diketahui bahwa kandungan total polifenol ekstrak gedi merah sangat tinggi yang dihitung berdasarkan kandungan total fenol (1003,5 mg/Kg), kandungan total flavonoid (722,5mg/Kg) dan kandungan total tannin (1029 mg/Kg). Ekstrak gedi merah mengandung flavonoid golongan flavanon dan flavanonol.In North Sulawesi Red “ Gedi “ plants already known by most people, because this plant is widely used as avegetable. Red Gedi plant is used as an alternative treatment to lower cholesterol levels , hypertension and antidiabetic. This study aims to determine the content of total polyphenols contained in the leaves of red and gedi isolate and identify the content of flavonoids in the leaves of red gedi. After testing is known that the total polyphenol content of red gedi extract very high which is calculated based on the total phenol content (1003.5mg/kg), total flavonoid content (722.5 mg/kg) and total tannin content (1029 mg/Kg). Red gedi extract contains flavonoids and flavanones groups flavanonol.
AKTIVITAS ANTIFOTOOKSIDASI NANOPARTIKEL PERAK YANG DISINTESIS MENGGUNAKAN KULIT PISANG KEPOK (Musa Paradisiaca L.) Colling, Erningsi; Suryanto, Edi; Wuntu, Audy
CHEMISTRY PROGRESS Vol 11, No 2 (2018)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/cp.11.2.2018.27943

Abstract

ABSTRAK Penelitian ini bertujuan untuk mengetahui Aktivitas antifotooksidasi nanopartikel perak yang disintesi menggunakan kulit pisang kepok. Larutan perak nitrat (AgNO3) 1mM direduksi menggunakan ekstrak kulit pisang kepok yang didiamka selama 15 menit pada ruang gelap. Karakterisasi menggunakan spektrofotometer UV-Vis dan Scanning Electron Microscope (SEM). Analisis terhadap stpektra UV-Vis menunjukan bahwa nanopartikel relatif stabil pada panjang gelombang 414.50-447.00 nm. Hasil dari karakterisasi SEM menunjukan nanopartikel perak yang disintesis menggunakan ekstrak kulit pisang kepok dengan perak nitrat (AgNO3) 1mM memiliki ukuran terkecil 46 nm dan yang terbesar mencapai 65 nm. Hasil penelitian ini menunjukan bahwa nanopartikel perak yang disintesis menggunakan ekstrak kulit pisang kepok memiliki kandungan fenolik dan aktivitas antiofotooksidasi lebih rendah dibandingkan dengan ekstrak kulit pisang kepok tanpa nanopartikel perak. ABSTRACTThis study aims to determine the antiphotooxidation activity of silver nanoparticles synthesized by kepok banana peel. Silver nitrate (AgNO3) 1mM solution was reduced using kepok banana peel extract which was stored for 15 minutes in a dark room. Characterization used UV-Vis spectrophotometer and Scanning Electron Microscope (SEM). Analysis of UV-Vis spectrum showed that nanoparticles were relatively stable at wavelength 414.50-447.00 nm. The results of SEM characterization showed that silver nanoparticles synthesized by 1mM kepok banana peel extract with silver nitrate (AgNO3) had the smallest size of 46 nm and the largest reached 65 nm. The results of this study showed that silver nanoparticles synthesized by kepok banana peel extracts had a lower phenolic content and antiophotooxidation activity compared to kepok banana peel extract without silver nanoparticles.
AKTIVITAS TABIR SURYA DARI FRAKSI FENOLIK BUAH SIRIH HUTAN (Piper miniatum. Bl) Budiarso, Leo Arifsandi; Suryanto, Edi; Sudewi, Sri
CHEMISTRY PROGRESS Vol 8, No 1 (2015)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/cp.8.1.2015.9400

Abstract

This study was intended to determine the sunscreen activity from the phenolic fraction of betel fruits. Betel fruits powder extracted with maseration method with ethanol 80%. Furthermore betel fruits extract liquid successively fractioned using petroleum eter, etyl acetate, butanol, ethanol and aquades. The phytochemical analysis of faction determined using total phenolic, flavonoid and condensed tannin content. The sunscreens activity was evaluated in sun protection factor (SPF) of fraction with spectrophotometry UV-vis.The best fractions were characterized functional group using infra red spectrophometer. The result showed that the butanol fraction have the highest total phenolic and condensed tannin content and petroleum eter fraction possessed highest total flavonoid content. Butanol fraction has the highest antioxidant activity than the other fraction. Aquades fraction (16.14) showed highest sun protection factor (SPF) value followed by petroleum eter, ethyl acetate, butanol and ethanol. SPF velue were 8.07; 6.93; 6.70; 5.38 dan 5.29.Penelitian ini bertujuan untuk menentukan aktivitas antioksidan dan potensi tabir surya dari fraksi buah sirih hutan. Serbuk buah sirih hutan diekstraksi dengan metode maserasi menggunakan pelarut etanol 80%. Ekstrak buah sirih hutan difraksinasi berturut turut dengan petroleum eter, etil asetat, butanol, etanol dan akuades. Analisis kandungan fitokimia fraksi-fraksi ditentukan berdasarkan total fenolik, flavonoid dan tannin terkondensasi. Aktivitas tabir surya pada fraksi-fraksi dievaluasi dengan analisis sun protection factor (SPF) menggunakan spektrofotometer UV-vis. Fraksi terbaik dikarakterisasi gugus fungsinya menggunakan spektrofotometer infra merah (FTIR). Hasil penelitian menunjukkan bahwa fraksi butanol memiliki kandungan total fenolik dan tanin terkondensasi tertinggi sedangkan kandungan flavonoid tertinggi terdapat pada fraksi butanol, petroleum eter dan etil asetat. Fraksi akuades memiliki aktivitas tabir surya tertinggi dibandingkan dengan fraksin diikuti fraksi petroleum eter, etil asetat, butanol dan etanol. Nilai SPF berturut-turut adalah 8,07; 6,93; 6,70; 5,38 dan 5,29.
SATU SENYAWA ASAM ORGANIK YANG DIISOLASI DARI DAUN GEDI (Abelmoschus manihot L. Medik) ASAL SULAWESI UTARA Mamahit, Lexie P.; Soekamto, Nunuk H.
CHEMISTRY PROGRESS Vol 3, No 1 (2010)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/cp.3.1.2010.73

Abstract

This research was aimed to isolate and identify the structure of secondary metabolities from gedi leaf. In order to achieve this research aim, an extraction of the gedi leaf tissue with methanol solvent had been carried out. These extract then was partitioned in several organic solvents such as n-hexane, chloroform and ethyl acetate. Further, the resulted partition was fractionation and purifying undergoes an appropriate method like liquid and vacuum pressure chromatography and also determining the melting points. To determine the chemical structure of the isolate, a compilation of several spectroscopic methods, such as infrared (IR), 1H and 13 C nuclear magnetic resonance (NMR), techniques (HMQC, HMBC, and COSY). Results of this research shown that one major constituent was isolated from the leaf of gedi: heptadecanoid acid. 
EFEK PEMANASAN TERHADAP AKTIVITAS ANTIOKSIDAN EKSTRAK EMPELUR BATANG SAGU BARUK (Arenga microcarpha B.) Landjang, Enrico Yoel; Momuat, Lidya; Suryanto, Edi
CHEMISTRY PROGRESS Vol 10, No 1 (2017)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/cp.10.1.2017.27968

Abstract

The objective of this research was to acknowledge the effect of heating on the total phenolic compound of sago baruk trunk pith extract and the antioxidant activity of sago baruk trunk pith extract on preventing the oxidation of linoleic acid. Sago baruk trunk pith extract obtained from blending the sago baruk sample with the water solvent and was given a variety of temperature that are room temperature, 50 oC, 75 oC, and 100 oC. Total phenolic compound measured with Folin-ciocalteu method and the antioxidant activity of sago baruk trunk pith was tested to linoleic acid with Ferric Thiocyanate method to measure the peroxide inhibition percentage and Thiobarbituric Acid Reactive Substance method to measure the malonaldehyde inhibiton percentage. The result of total phenolic compound of sago baruk trunk pith extract when given the heating process with a total of 69,286-72,449 mg/kg and was higher compared to before given heating process. The best antioxidant activity of sago baruk trunk pith extract on preventing the peroxide and malonaldehyde was when given the 75 oC heating process with a value of 57,374% for peroxide inhibition and 69,527% for malonaldehyde inhibition. This research concluded that the sago baruk trunk pith extract has the best total phenolic compound and the antioxidant activity when given the 75 oC heating process.ABSTRAKPenelitian ini bertujuan untuk mempelajari efek pemanasan terhadap kandungan total fenolik dari ekstrak empulur sagu baruk serta aktivitas antioksidan ekstrak empulur sagu baruk dalam menghambat oksidasi asam linoleat. Ekstrak empulur sagu baruk diperoleh dari hasil blender sampel sagu baruk dengan pelarut air kemudian diberi perlakuan pada beberapa variasi suhu yaitu suhu kamar, 50 oC, 75 oC, dan 100 oC. Kandungan total fenolik diukur menggunakan metode Folin-ciocalteu dan aktivitas antioksidan dari ekstrak empulur sagu baruk diuji pada asam linoleat menggunakan metode Ferric Thiocyanate untuk menghitung persen penghambatan peroksida dan metode Thiobarbituric Acid Reactive Substance untuk mengukur persen penghambatan pembentukan malonaldehida. Hasil kandungan total fenolik ekstrak empulur sagu baruk ketika diberi perlakuan pemanasan dengan jumlah 69,286 – 72,449 mg/kg dan lebih tinggi dibandingkan sebelum dipanaskan. Aktivitas antioksidan dari ekstrak empulur sagu baruk dalam menghambat peroksida dan malonaldehida yang terbaik ketika diberi perlakuan suhu 75 oC dengan nilai masing-masing 57,374% untuk penghambatan peroksida dan 69,527% untuk penghambatan malonaldehida. Penelitian ini menyimpulkan bahwa ekstrak empulur sagu baruk memiliki kandungan total fenolik serta aktivitas antioksidan terbaik ketika diberi perlakuan suhu 75 oC
UJI KUALITAS BAKASANG IKAN CAKALANG (KATSUWONUS PELAMIS) YANG ADA DI PASARAN BERDASARKAN PARAMETER FREE FATTY ACID (FFA) DAN PEROXIDE VALUE (PV) Montolalu, Gisella T.; Fatimah, Feti; Kamu, Vanda
CHEMISTRY PROGRESS Vol 12, No 1 (2019)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/cp.12.1.2019.27921

Abstract

ABSTRAK Bakasang adalah produk fermentasi yang dibuat dari jeroan ikan. Telah dilakukan penelitian uji kualitas bakasang ikan cakalang (Katsuwonus pelamis) yang ada di pasaran berdasarkan parameter Free Fatty Acid (FFA) dan Peroxide value (PV). Bakasang yang digunakkan berasal dari empat tempat berbeda Sario, Tambala, Supermarket dan Karombasan. Bilangan peroksida tertinggi adalah bakasang yang dibeli di Supermarket 5,18 meq/kg dan yang terendah adalah bakasang yang dibeli di Tambala 3,88 meq/kg. Asam lemak bebas tertinggi adalah bakasang yang dibeli di Karombasan 2,13% dan yang terendah adalah bakasang yang dibeli di Sario 1,25%. ABSTRACT Bakasang is a fermented product made from fish innard. Research has been conducted of the quality of cakalang fish (Katsuwonus pelamis) on the market has been conducted based on the parameters of Free Fatty Acid (FFA) and Peroxide value (PV). Bakasang used are from four different places: Sario, Tambala, Supermarket and Karombasan. The highest peroxide number was bakasang purchased at 5.18 meq / kg Supermarket and the lowest was bakasang purchased at Tambala 3.88 meq / kg. The highest free fatty acid was bakasang which was bought in Karombasan 2.13% and the lowest was bakasang which was bought in Sario 1.25%. 
UJI AKTIVITAS ANTIOKSIDAN DARI DAUN CENGKEH (Eugenia Carryophyllus) DENGAN METODE DPPH Rorong, Johnly
CHEMISTRY PROGRESS Vol 1, No 2 (2008)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/cp.1.2.2008.4961

Abstract

Clove (Eugenia carryophyllus) is a traditional food ingredient characterized by its specific and refreshingaroma. This study was intended to determine the antioxidative effects of clove leaves. Clove leaves wasextracted sequentially with hexane, methanol and ethanol. The antioxidative effects of the extracts weredetermined by 1,1-diphenyl-2-picrylhydrazyl (DPPH) scavenging and reducing power assay. Total phenoliccontent of ESME extracts the highest compared with EHS and EEM were 0,851; 1,8575 and 1,237 mg/kgrespectively, which expressed as gallic acid equivalent. The addition of methanol extracts of clove leavesin the reaction mixture showed the highest scavenging activity in 1,1-diphenyl-2-picrylhydrazyl (DPPH)radical and reducing power. These results suggest that the ethanolic extract of clove leaves containscompounds having antioxidative activities Keywords : clove, autooxidation, photooxidation, solvent extraction, DPPH
PEMURNIAN CRUDE GLYCEROL DENGAN CARA PENGASAMAN DAN ADSORPSI MENGGUNAKAN ZEOLIT ALAM LAMPUNG Aziz, Isalmi; Las, Thamzil; Shabrina, Annisa
CHEMISTRY PROGRESS Vol 7, No 2 (2014)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/cp.7.2.2014.7469

Abstract

This study aims to determine the optimum conditions for the adsorption process and the characteristics ofresulting glycerol after the adsorption process. Raw material for making crude glycerol is used cooking oilobtained from fried food merchants around the campus of UIN Syarif Hidayatullah Jakarta. Crude glycerol wasmade from used transesterification reaction of cooking oil (10 L), methanol (2.5 L) and catalyst KOH (95 g) at 60° C for 1 hour. Crude glycerol is separated from the biodiesel and sulfuric acid 1.19 M was added until pHreached 6 and formed two layers. The bottom layer (rich glycerol) was separated by filtration and glycerol levelswas 60.7%, water was 18.72%, ashes was 35, negative for sugar, potassium metal of 4458 ppm and density of 1.140 g/mL. The next stage is process of adsorption using activated natural zeolite Lampung. Crude glycerol as the result of acidification process was added with activated natural zeolite, stirred, settled and filtered. Adsorption process is done by varying the time (30, 45, 60, 75 and 90 minutes) zeolite concentrations (6, 9, 12, 15 and 18%), temperature (30, 40, 60, 80 and 100 °C) and the size of the zeolite (9, 25 and 60 mesh). The optimum condition of adsorption process was found to be 75 minutes, with 12% zeolite concentration, temperature of 60 °C and the size of the zeolite 0.2 mm with glycerol content of 88.91%, 7.38% water, 3% ashes, contains no sugar and density of 1,231g/mL.Penelitian ini bertujuan untuk menentukan kondisi optimum proses adsorpsi dan karakteristik gliserol yang dihasilkan setelah proses adsorpsi. Bahan baku pembuatan crude glycerol adalah minyak goreng bekas yang diperoleh dari pedagang gorengan disekitar kampus UIN Syarif Hidayatullah Jakarta. Crude glycerol di buat dari reaksi transesterifikasi minyak goreng bekas (10 L), metanol (2,5 L) dan katalis KOH (95 g) pada suhu 60 oC selama 1 jam. Crude glycerol dipisahkan dari biodiesel dan ditambahkan asam sulfat 1,19M sampai pH 6sehingga terbentuk dua lapisan. Lapisan bawah (kaya gliserol) dipisahkan dengan cara penyaringan dan didapatkan kadar gliserol 60,7%, air 18,27%, abu 35, gula negatif, logam kalium 4458 ppm dan massa jenis 1,140 g/mL. Tahap selanjutnya adalah proses adsorpsi menggunakan zeolit alam Lampung yang sudah diaktivasi. Crude glycerol hasil pengasaman ditambahkan zeolit alam teraktivasi, di aduk, didiamkan dandisaring. Proses adsorpsi dilakukan dengan memvariasikan waktu (30, 45, 60, 75 dan 90 menit) konsentrasi zeolit (6, 9, 12, 15 dan 18%), suhu (30, 40, 60, 80 dan 100 oC) dan ukuran zeolit (9, 25 dan 60 mesh). Kondisi optimum proses adsorpsi didapatkan pada waktu 75 menit, konsentrasi zeolit 12%, suhu 60 oC dan ukuran zeolit 0,2 mm dengan kadar gliserol 88,91%, air 7,38%, abu 3%, tidak mengandung gula dan massa jenis 1,231g/mL.
MEMPELAJARI REAKSI ISOMERISASI SAFROL DENGAN PEREAKSI t-BuOK/DMSO DAN KOH/CH2OHCH2OH Gugule, Sanusi; Fatimah, Feti
CHEMISTRY PROGRESS Vol 2, No 1 (2009)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/cp.2.1.2009.64

Abstract

The studies have been done about the transformation of safrole into isosafrole. The transformation wasdone using reagents, namely t-BuOK/DMSO and KOH/CH2OHCH2OH. The purities of all products weretested with thin layer and gas chromatography. Thereafter the structures were identified with infraredspectrophotometers, NMR1H and 13C spectrometry, and mass spectrometry. The isomerization product ofsafrole into isosafrole with highest percentage yield (97%) was given t-BuOK/DMSO.

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