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All Journal Jurnal Teknologi Industri Pertanian Jurnal Riset Kimia JURNAL HAMA DAN PENYAKIT TUMBUHAN TROPIKA INDONESIAN JOURNAL OF APPLIED PHYSICS ALCHEMY Jurnal Penelitian Kimia Jurnal Entomologi Indonesia
Gustini Syahbirin
Departemen Kimia, Fakultas MIPA, Institut Pertanian Bogor
Agriculture, Biological Sciences & Forestry Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Physics

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STUDI PENGARUH PERBANDINGAN REAKTAN LIGNIN NaHSO3 DAN pH TERHADAP NATRIUM LIGNOSULFONAT (NaLS) Syahbirin, Gustini; Suryani, Ani; Dzikrulloh, Tesar
Jurnal Riset Kimia Vol 1, No 2 (2008): March
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v1i2.43

Abstract

 ABSTRACT Lignin was isolated from waste black liquor of soda pulping process. Sulfonation of soda lignin produced Sodium Lignosulfonate (NaLS) which can be used as dispersants, and concrete admixtures. In this research, sulfonation was carried out towards lignin with ratio of lignin-NaHSO3 of 1.0:0.4; 1.0:0.5; and 1.0:0.6, and initial pH of 5.00; 6.00; 7.00. Parameters observed were purity, final pH, and yield of NaLS. The upsurge of initial pH increased the final pH and NaLS yield, but decreased its purity. The upsurge of ratio of lignin-NaHSO3 increased NaLS yield and decreased its purity, but did not affect the final pH of NaLS. The chosen optimum condition was on pH of 6.00 and ratio of lignin-NaHSO3 of 1.0:0.6. Characterization of functional group using FTIR, and purity of NaLS using UV-Visible Absorption Spectrophotometer. Keywords: soda lignin, sulfonation of lignin, sodium lignosulfonate 
The Influence Of Reactant Ratio (Eupcalyptus Lignin – Sodium Bisulfite) And Initial Ph Towards Characteristcs Of Sodium Lignosulfonate Gustini Syahbirin; ABDUL Aziz Darwis; Ani Suryani; Wasrin Syafii
Jurnal Teknologi Industri Pertanian Vol. 19 No. 2 (2009): Jurnal Teknologi Industri Pertanian
Publisher : Department of Agroindustrial Technology, Bogor Agricultural University

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Abstract

Eucalyptus lignin was isolated from kraft black liquor through by acidification using H2SO4. Sulfonation of eucalyptus lignin produced sodium lignosulfonate (SLS) which can be used as dispersants, and emulsifier. In this research, sulfonation was carried out towards lignin with mass ratio of eucalyptus lignin-NaHSO3 (b/b) of 1:0.4, 1:0.5, and 1:0.6, and initial pH of 5, 6, 7, 8. Studies on the effect of various ratio of eucalyptus lignin versus NaHSO3 (1 based on w/w) and initial pH of 5,6,and 7 for the sulfonation reaction showed an  increasing yield and improved purity of SLS obtained.  However, no significant result was observed on the application of initial pH  7 and 8 toward increasing of SLS yield and purity.  The highest SLS  yield of 83.8% with  purity of 82.9% was obtained under condition of initial pH at 7 and the mass ratio of eupcayptus lignin over NaHSO3 was 1:0.5.  The resulted SLS was light brown, water soluble, with  pH level between 6.3 and 7.24, and released sulfur-like odor.Key words: lignin, kraft black liquor,  sodium lignosulfonate.
UTILIZATION OF NATRIUM LIGNOSULPONATE FROM BLACK LIQUOR AS DISPERSANT ADDITIVE FOR ECO-MORTAR MIXTURE Sri Mudiastuti, Suryono Suryokusumo, Gustini Syahbirin dan Yuyun Yumairoh
Jurnal Teknologi Industri Pertanian Vol. 20 No. 3 (2010): Jurnal Teknologi Industri Pertanian
Publisher : Department of Agroindustrial Technology, Bogor Agricultural University

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Abstract

ABSTRACT  Lignin of lignosulfonate was made by a waste product of pulp and paper industry which can be used as a water reducer in a mortar mixture  which consisted of 338 grams of water, 1050 grams of stone granule, 520 grams cement and 0.3 percent of natrium lignosulfonate. The mechanical characteristics of this mortar substances can influence such as diameter of flow, flexural strength, compressive strength, and setting time of cement paste. Lignosulfonate shows its function as dispersant on cement hydration for 3 days as it was analyzed by x-ray difractometer. Research result showed that flow of fresh mortar rise with increase of concentration (from weight of cement) of synthetic natrium lignosulfonate (NaLS). It showed that mortar homogenity also increased. The result of flexural strength and compressive strength tests using synthetic NaLS of 0.1-0.3% from weight of cement showed that addition of synthetic NaLS of 0.2% was the best result as shown it had the highest of flexural strenght and compressive strength values. Initial setting time of cement paste increased about 50% with addition of synthetic NaLS 0.2%. Whereas the final setting time decreased about 8%. Cement hydration test showed the increases of hydration product peak, Ca(OH)2 and calcium silicate hydrate (C-S-H) contents.  Keywords: black liquor, lignosulfonate, mortar, compressive strength, flexural strength  
STUDI PENGARUH PERBANDINGAN REAKTAN LIGNIN NaHSO3 DAN pH TERHADAP NATRIUM LIGNOSULFONAT (NaLS) Gustini Syahbirin; Ani Suryani; Tesar Dzikrulloh
Jurnal Riset Kimia Vol. 1 No. 2 (2008): March
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v1i2.43

Abstract

 ABSTRACT Lignin was isolated from waste black liquor of soda pulping process. Sulfonation of soda lignin produced Sodium Lignosulfonate (NaLS) which can be used as dispersants, and concrete admixtures. In this research, sulfonation was carried out towards lignin with ratio of lignin-NaHSO3 of 1.0:0.4; 1.0:0.5; and 1.0:0.6, and initial pH of 5.00; 6.00; 7.00. Parameters observed were purity, final pH, and yield of NaLS. The upsurge of initial pH increased the final pH and NaLS yield, but decreased its purity. The upsurge of ratio of lignin-NaHSO3 increased NaLS yield and decreased its purity, but did not affect the final pH of NaLS. The chosen optimum condition was on pH of 6.00 and ratio of lignin-NaHSO3 of 1.0:0.6. Characterization of functional group using FTIR, and purity of NaLS using UV-Visible Absorption Spectrophotometer. Keywords: soda lignin, sulfonation of lignin, sodium lignosulfonate 
AKTIVITAS INSEKTISIDA EKSTRAK BIJI TRICHILIA TRIJUGA ROXB. (MELIACEAE) TERHADAP ULAT DAUN MELATI PALPITA UNIONALIS (HÃœBNER) Ika Sartika , Djoko Prijono Gustini Syahbirin , dan Maryam Abn.
Jurnal Hama dan Penyakit Tumbuhan Tropika Vol. 1 No. 2 (2001): SEPTEMBER, JURNAL HAMA DAN PENYAKIT TUMBUHAN TROPIKA
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (100.847 KB) | DOI: 10.23960/j.hptt.2137-44

Abstract

Insecticidal activity of Trichilia trijuga Roxb. (Meliaceae) seed extracts against jasmine leaf caterpillar Palpita unionalis (Hübner). The insecticidal activity of Trichilia trijuga seed extracts was evaluated in the laboratory against the jasmine leaf caterpillar Palpita unionalis. Acetone neem (Azadirachta indica) seed extract and NeemAzal T/S formulation (a.i.: 1% azadirachtin) were included in the test as positive controls. First-instar larvae of P. unionalis were fed with treated jasmine leaves for 2 days, then surviving larvae were fed with untreated leaves and observed daily until reaching third-instar stage. The treatments with acetone extract and aqueous extract of T. trijuga at concentrations of 0.175% and 21 g of seeds/l of water (2.1%), respectively, caused a complete kill in the test larvae. The insecticidal activity of T. trijuga acetone extract at 0.175% was comparable with that of NeemAzal preparation containing azadirachtin of about 10 – 17.5 ppm. Based on larval mortality until the third instar, LC50 of acetone extract and aqueous extract of T. trijuga were 0.024% and 0.307%, respectively (LC50 of acetone neem seed extract was 0.018%). In addition to lethal effect, T. trijuga seed extracts also delayed the development of the surviving larvae; for example, the treatment with T. trijuga acetone extract at 0.1% prolonged the developmental time of P. unionalis larvae to the third instar by 3 days compared to control. It is concluded that T. trijuga seeds serve as a potential source of botanical insecticides, particularly against P. unionalis.
Gangguan fisiologi dan biokimia Crocidolomia pavonana (F.) (Lepidoptera: Crambidae) akibat perlakuan ekstrak campuran Tephrosia vogelli dan Piper aduncum Eka Chandra Lina; Dadang Dadang; Syafrida Manuwoto; Gustini Syahbirin
Jurnal Entomologi Indonesia Vol 12 No 2 (2015): Juli
Publisher : Perhimpunan Entomologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (338.723 KB) | DOI: 10.5994/jei.12.2.100

Abstract

Plant extracts have been known to cause physiological and biochemical interferences against insect, such as feeding inhibitor, food assimilation, and changes on activity of cytochrome b5 and cytochrome P450. This study was carried out to examine the effect of the extracts mixture of Tephrosia vogeliiand : Piper aduncum (1 : 5) on the physiology of Crocidolomia pavonana (F.) as well as extract of P. aduncum on biochemical of C. pavonana. The study showed that larvae of C. pavonana was experiencing a feeding inhibition until 94.82% after treated with extracts mixture on concentration 0.06% or equivalent to LC95. However, larvae treated with extracts mixture on LC25 and LC50 only experienced a relative growth disorders as a result of intrinsic toxicity of extracts mixture which enters into the body of insects. Insect adaptation to toxic plant compounds indicated by an increase in the digestibility of larvae approximately 11.11%. Furthermore, detoxification mechanism by larvae against active compounds of P. aduncum occured and shown by an increase of oxidative enzyme activity of cytochrome b5 and cytochrome P450, in in vivo and in vitro compared to control. This study provides an information about mode of action of extracts mixture of T. vogelii and P. aduncum (1 : 5) on larvae of C. pavonana and detoxification mechanism by larvae due to extract of P. aduncum
Performance of Doped Montmorillonite on Photosensitizer Based Natural Dyes Gardenia Jasminoides Sri Mulijani; Komar Sutriah; Gustini Syahbirin; Shabrina Shabrina
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 12, No 1 (2022): IJAP Volume 12 ISSUE 01 YEAR 2022
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v12i1.54786

Abstract

Dye Sensitized Solar Cell (DSSC) is an electrochemical cell that is able to convert solar energy from light to electrical energy. This technology is needed by the world as a renewable and environment friendly energy. In this study, we evaluate the consideration of modification montmorillonite and Gardenia jasminoides dyes may achieve better performance of DSSC by manufactured DSSC with modified TiO2 semiconductors using montmorillonite (MMT) and Nafion. Performance of DSSC was determined by potentiometer. Atomic force microscope was used to evaluate the characteristic of DSSC. The UV-vis results revealed that the dyes which is extracted from the Gardenia jasminoides content crocin and quercetin compounds. Modification DSSC contains ratio of MMT: nafion (50:50) exhibited highest power conversion efficiency value of 0.8316%. Topography of surface ensured the dyes have occupied surface area and able to promote electron to higher energy.  However, MMT and nafion capable to enhance potential of dyes as photosensitizer in DSSC. 
Optimalisasi Sifat Reologi Hidrogel Kitosan-Hialuronat yang Ditaut-Silang dengan Glutaraldehida Pajri Samsi Nasution; Muhamad Alif Hamimdal; Gustini Syahbirin; Budi Arifin
ALCHEMY Jurnal Penelitian Kimia Vol 15, No 1 (2019): Maret
Publisher : UNIVERSITAS SEBELAS MARET (UNS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (461.927 KB) | DOI: 10.20961/alchemy.15.1.22536.24-43

Abstract

Kitosan membentuk hidrogel polikationik dengan penambahan glutaraldehida sebagai penaut-silang. Penambahan hialuronat yang bersifat polianionik diharapkan akan meningkatkan sifat reologis hidrogel tersebut. Penelitian ini mengevaluasi pengaruh konsentrasi glutaraldehida dan hialuronat pada kekuatan gel, titik pecah, dan ketegaran, serta sifat pembengkakan dan pengerutan hidrogel kitosan, dan menentukan konsentrasi optimum keduanya melalui analisis data dengan perangkat lunak Modde 5Ò. Hialuronat meningkatkan kekuatan gel, titik pecah, dan ketegaran hidrogel kitosan pada konsentrasi glutaraldehida yang rendah, tetapi berpengaruh sebaliknya pada konsentrasi glutaraldehida yang tinggi. Sejalan dengan itu, pembengkakan juga menjadi relatif tinggi, sedangkan pengerutan menjadi relatif rendah setelah penambahan hialuronat, tetapi hanya pada konsentrasi glutaraldehida yang rendah. Berdasarkan hasil ini, hialuronat diperkirakan mengisi ruang kosong di antara taut-silang imina yang terbentuk antara glutaraldehida dan kitosan. Pada konsentrasi glutaraldehida yang tinggi, taut-silang ini tidak menyisakan lagi ruang kosong bagi hialuronat. Sebaliknya, air sedikit demi sedikit akan terdesak keluar dari dalam hidrogel dan memicu pengerutan. Komposisi optimum diperoleh pada konsentrasi kitosan 2,0% (b/v), hialuronat 0,3% (v/v) dan glutaraldehida 1,4% (v/v), yang memberikan kekuatan gel, titik pecah, ketegaran, pembengkakan dan pengerutan berturut-turut sebesar 678,4 g cm-2; 1,294 cm; 5,033 g cm-1; 2,634 g dan 0,148 g. Pengukuran sifat reologi hidrogel yang dibuat dengan komposisi optimum tersebut memberikan hasil yang lebih rendah (190,7 g cm-2; 0,767 cm; 1,675 g cm-1) untuk tiga sifat reologi pertama, tetapi lebih tinggi (2,844 g and 0,348 g) untuk dua sifat berikutnya.Optimization of Rheological Property of Chitosan-Hyaluronate Hydrogel Crosslinked by Glutaraldehyde. Chitosan forms a polycationic hydrogel by addition of glutaraldehyde as a crosslinker. The addition of hyaluronate which is polyanionic is expected to improve the rheological properties of the hydrogel. This study evaluated the effects of glutaraldehyde and hyaluronate concentration on the gel strength, breakpoint, and rigidity of the chitosan hydrogel as well as the swelling and shrinking properties. This study determined the optimum concentration of both of glutaraldehyde and hyaluronate by data analysis using Modde 5Ò software. Hyaluronate increased the gel strength, breakpoint, and rigidity at a low glutaraldehyde concentration, but showed the opposite effects at high glutaraldehyde concentration. At a low concentration of glutaraldehyde, relatively high swelling and low shrinking were revealed after hyaluronate addition. From these results, it was suggested that hyaluronate filled the empty spaces between the imine-crosslinks created by glutaraldehyde and chitosan. At high concentration of glutaraldehyde, the crosslinks became so extensive that no more space was left for hyaluronates. Otherwise, water would be squeezed out from the hydrogel and syneresis would happen. The optimum composition was obtained at 2.0% (w/v) chitosan, 0.3% (v/v) hyaluronate and 1.4% (v/v) glutaraldehyde, which achieved the gel strength, breakpoint, rigidity, swelling and shrinking of 678.4 g cm-2, 1.294 cm, 5.033 g cm-1, 2.634 g and 0.148 g, respectively. However, rheological property measurement of hydrogel synthesized by using the optimum composition gave lower results (190.7 g cm-2, 0.767 cm, 1.675 g cm-1) for the first three properties, but higher results (2.844 g and 0.348 g) for the latter two.
Co-Authors Abdul Aziz Darwis Ani Suryani Ani Suryani Budi Arifin DADANG DADANG Eka Chandra Lina Komar Sutriah LAKSMI AMBARSARI Muhamad Alif Hamimdal Nur Qadri Rasyid Pajri Samsi Nasution Purwantiningsih Sugita Shabrina Shabrina Sri Mulijani Syafrida Manuwoto Tesar Dzikrulloh Wasrin Syafii dan Kurnia Sofyan Gustan Pari Buchari