Garuda - Garba Rujukan Digital

PEMANFAATAN KULIT DAN BONGGOL PISANG UNTUK BAHAN BAKU MAKANAN RINGAN DI MAJELIS TAKLIM AN NUR CILEUNYI KABUPATEN BANDUNG Vina Amalia; Tina Dewi Rosahdi; Tety Sudiarti
Al-Khidmat Vol 2, No 1 (2019)
Publisher : Pusat Pengabdian kepada Masyarakat LP2M UIN Sunan Gunung Djati Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/jak.v2i1.5534

Banana is a favorite fruit of the Indonesian people. So far, only the fruit is consumed, while the peel, hump and others are useless and become waste. The banana peel and banana humps contain high nutritional value. So that it has the potential to be processed as a food product, such as “sale” of banana peels, abon and banana hump jerky. This product can be an added income for woman’s, the members of the Taklim (MT) assembly of An Nur. MT consists of woman’s from various professional backgrounds. Most of them are ordinary housewives who are also agent of Posyandu RW 03 Cileunyi Kulon Village, Kec. Cileunyi Kab. Bandung. Some of them are teachers and entrepreneurs. Training on making food made from banana humps and peel was carried out for two months. Consisting of counseling on nutritional content, the practice of making “Sale”, shredded meat and beef jerky, and marketing strategies. The obstacle faced is the limitation of banana humps, because banana only found when bananas are harvested. While the processing of banana peels produces products that have less attractive colors because of the browning process that is common in processing bananas so that dyes are needed. Marketing using online media is not suitable for members of MT An Nur, where only a few members have social media and smart phones. In the future, this skill is expected to be the provision of mothers to improve their nutritional status and family economy and can be disseminated through their own MT programs and posyandu programs at the RW, village and sub-district levels.

MEKANISME INHIBISI KOROSI BAJA KARBON DALAM LINGKUNGAN AIR SADAH Tety Sudiarti
JURNAL ISTEK Vol 8, No 2 (2014): ISTEK
Publisher : JURNAL ISTEK

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

Air untuk keperluan heating dan/atau cooling system di berbagai industri banyak yang bersifat sebagai air sadah (hard water), dan dialirkan melalui pipa yang terbuat dari baja karbon. Sifat korosif air sadah, dipengaruhi oleh suhu, dan perbandingan ion-ion yang bersifat agresif yaitu ion Cl-, dan ion SO42- terhadap ion-ion yang bersifat inhibitif, yaitu ion CO32-, HCO3- dan Ca2+. Air sadah merupakan medium korosif bagi baja karbon dan memerlukan inhibtor yang tepat untuk menanggulanginya, sehingga pengetahuan tentang mekanisme inhibisinya sangatlah penting. Pada penelitian ini dianalisis mekanisme inhibisi serta efektivitas inhibitor tiourea dan simetidin dalam lingkungan air sadah, berdasarkan parameter kinetika dan termodinamika. Sebagai contoh air sadah diambil dari salah satu industri tekstil di Bandung dengan penambahan 90 ppm ion klorida hasil optimasi penelitian sebelumnya. Tiourea digunakan sebagai inhibitor korosi karena memiliki kinerja yang baik dalam menghambat korosi baja karbon pada suasana basa dan simetidin karena memiliki struktur imidazol yang juga diharapkan memiliki daya inhibisi yang baik dalam lingkungan tersebut. Pengukuran laju korosi dan efisiensi inhibisi dilakukan dengan metode ekstrapolasi Tafel. Nilai Ea menunjukkan laju korosi pada rentang suhu 25 ºC sampai 55 ºC dikendalikan oleh proses difusi ionik dalam air. Nilai ΔHa dan ΔSa yang lebih positif pada air sadah yang mengandung inhibitor, mengindikasikan adanya proses penggantian posisi molekul air oleh inhibitor pada permukaan baja karbon selama adsorpsi berlangsung. Harga ΔGads yang negatif dan harga k yang tinggi, menandakan proses adsorpsi inhibitor merupakan proses yang spontan dan memiliki karakteristik interaksi dan kestabilan yang kuat antara lapisan yang diserap dengan permukaan baja. Meningkatnya harga Ea dengan adanya inhibitor, dan nilai ΔGads < -40 kJ/mol untuk simetidin, menandakan terjadinya adsorpsi secara fisik. Tetapi untuk tiourea nilai ΔGads > -40 kJ/mol yang menandakan terjadinya kemisorpsi. Nilai mutlak ΙΔGadsΙ menunjukkan tiourea lebih efektif daripada simetidin.

ADSORPSI SENYAWA 2,3-DIFENIL-IMIDAZO[1,2-A]PIRIDIN SEBAGAI INHIBITOR KOROSI BAJA KARBON DALAM LARUTAN ELEKTROLIT JENUH KARBON DIOKSIDA Tety Sudiarti
JURNAL ISTEK Vol 10, No 2 (2017): ISTEK
Publisher : JURNAL ISTEK

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

Pada industri pertambangan , minyak mentah yang dihasilkan bercampur dengan garam-garam klorida, gas yang bersifat asam seperti CO2 dan H2S, dan asam-asam organik yang memiliki berat molekul rendah seperti asam format dan asetat yang jika bercampur dengan air akan menjadi media yang sangat korosif terhadap bagian dalam pipa baja karbon yang digunakan dalam sumur produksi. Oleh karena itu, masalah korosi memerlukan penanganan yang sungguh-sungguh. Penanganan masalah ini masih sangat sulit karena faktor biaya yang sangat besar, oleh karena itu dibutuhkan upaya penanggulangan yang relatif lebih murah dan mudah. Salah satunya adalah dengan penambahan inhibitor korosi. Senyawa inhibitor yang digunakan adalah 2,3-difenilimidazo[1,2-a]piridin. Senyawa tersebut memiliki struktur molekul yang planar dan mengandung atom N yang memiliki pasangan elektron bebas yang dapat mengadsorpsi pada permukaan logam sehingga diharapkan dapat memiliki aktivitas inhibisi yang baik. Senyawa tersebut dianalisis daya inhibisi korosinya menggunakan metode Tafel dengan variasi konsentrasi dalam medium korosif larutan NaCl 1% jenuh CO2 serta ditentukan jenis isoterm adsorpsinya.. Hasil penelitian menunjukkan senyawa 2,3-difenil-imidazo[1,2-a]piridin menunjukkan aktivitas inhibitor yang baik dan adsorpsinya pada permukaan baja karbon sesuai dengan isoterm Langmuir yaitu dengan membentuk lapisan monolayer pada permukaan baja

Surface tension of corrosion inhibitor of carbon steel in hard water medium Tety Sudiarti
Jurnal Sains Dasar Vol 3, No 2 (2014): October 2014
Publisher : Faculty of Mathematics and Natural Science, Universitas Negeri Yogyakarta

Corrosion inhibition of carbon steel in hard water medium is very important because most of water for cooling and/or heating system needed in various industries is hard water and it is flown through pipes made of carbon steel. Before this, a research has been done concerning the effectiveness of inhibitors of thiourea and cimetidine as corrosion inhibitors in this medium. Here, a research has been done concerning the measurement of surface tension of thiourea and cimetidine to determine whether these inhibitors show properties similar to surfactants, hence indicate micellar phenomena. The Result of this research indicated that both thiourea and cimetidine are surfactants. The micellar critical concentration for both inhibitors is in accordance with the inhibitor concentration with optimal efficiency. Key words: surface tension, thiourea, cimetidine, surfactant

Preparasi Dan Karakterisasi Edible Film Dari Poliblend Pati Sukun-Kitosan Wini Setiani; Tety Sudiarti; Lena Rahmidar
Jurnal Kimia Valensi Jurnal Valensi Volume 3, No.2, November 2013
Publisher : Syarif Hidayatullah State Islamic University

Abstrak Plastik biodegradable dan terbuat dari bahan terbarukan seperti edible film merupakan salah satu solusi permasalahan lingkungan. Bahan baku utamanya yaitu pati, karena keberadaannya melimpah serta beragam di Indonesia, salah satunya pati sukun yang memiliki kandungan pati cukup tinggi (60 %). Namun edible film berbahan dasar pati saja memberikan sifat mekanik dan ketahanan air yang masih rendah. Pada penelitian ini akan dipreparasi edible film dari poliblend pati sukun-kitosan dengan plasticizer sorbitol. Metode yang dilakukan yaitu preparasi dan karakterisasi pati sukun kemudian preparasi dan karakterisasi edible film. Hasil karakterisasi pati sukun yang diperoleh yaitu kadar pati total 76,39 %, kadar amilosa dan amilopektin berturut-turut 26,76 % dan 73,24 %, suhu gelatinisasi pati sukun 73,98 ºC, kadar air 22,38 % serta derajat kecerahan yang menunjukkan karakteristik cerah dan berwarna abu-abu pucat. Hasil karakterisasi edible film menunjukkan, dengan bertambahnya kitosan maka kuat tarik dan ketahanan air cenderung meningkat. Secara umum hasil terbaik edible film adalah pada formulasi pati sukun-kitosan 6:4 dengan nilai water uptake sebesar 212,98 %, nilai kuat tarik sebesar 16,34 MPa, nilai elongasi sebesar 6,00 % dan modulus young sebesar 2,72 MPa. Meskipun demikian, hasil analisis morfologi edible film pada formulasi pati sukun-kitosan 6:4 masih terdapat pori dan retakan. Kata kunci : edible film, pati sukun, kitosa. Abstract Biodegradable and renewable plastic such as edible film is one of solution the environmental problem. The main raw material is from starch, because of it is abundant and varied in Indonesia, one of them is breadfruit starch which has enough high starch content (60 %). But edible film based on starch give less mechanical properties and less water resistance. In this research the edible film was made from poliblend of breadfruit starch-chitosan with sorbitol addition. The Method was done, preparation and characterization of breadfruit starch then preparation and characterization of edible film. The characteristic result of breadfruit starch was obtained for total starch content 76.39 %, content of amylose and amylopecktin were 26.76 % and 73.24 % respectively, the gelatinitation temperature of breadfruit starch was 73.98 ºC, water content 22,38 % and the degree of brightness showed bright characteristic and pale grey colour. The characteristic result of edible film showed the increasing of chitosan concentration, the tensile strength and water resistance tended to rise. Generally the best result of edible film was on breadfruit starch-chitosan formulation 6:4 g/g by the value of water uptake was 212.98 %, tensile strength was 16.34 MPa, elongation was 6,00 % and modulus young was 2,72 MPa. However, the result of mhorphology analysis showed that the edible film of breadfruit starch-chitosan formulation 6:4 are still pores and cracks. Keywords : edible film, breadfruit starch, chitosan.

SYNTHESIS OF ZrO2 VIA ULTRASONIC ASSISTED PRECIPITATION METHOD FOR PHOTODEGRADATION OF METHYLENE BLUE Soni Setiadji; Nur Tursina; Nanda Dwimar Hakim; Sanusi Sanusi; Tety Sudiarti; Dani Gustaman Syarif
Jurnal Keramik dan Gelas Indonesia Vol 30, No 1 (2021): Jurnal Keramik dan Gelas Indonesia
Publisher : Balai Besar Keramik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32537/jkgi.v30i1.6807

Zirconium dioxide (ZrO2) is a semiconductor material which its photocatalytic properties for degradation of methylene blue has been investigated in this research. ZrO2 was prepared from ZrCl4 solution by adding NaOH through precipitation method without ultrasonication, and also with ultrasonication for 1 h and 2 h. The specimens of ZrO2 were analyzed by X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM), and Brunauer-Emmett-Teller (BET). The XRD of all ZrO2 samples showed that the smallest ZrO2 crystal size was 8.149 nm based on Debye-Scherrer calculations for ultrasonic time of 2 h. The lattice parameter of ZrO2 under tetragonal phase was analyzed using Rietvield refinement by La Beil method. The specific surface area of all ZrO2 specimens were confirmed by BET. The result showed specific surface area of 99.741 m2/g for treatment with 2 h ultrasonication. The effect of ultrasonic assisted precipitation could increase the photocatalytic activity. This result showed that the degradation of methylene blue by ZrO2 with 2 h ultrasonication is higher than both by ZrO2 with 1 h ultrasonication and ZrO2 without ultrasonication with values of 93.00 %, 88.32 % and 77.53 % respectively, at 120 min irradiation, pH of 10 and 0.05 g of ZrO2

PEMBUATAN DAN KARAKTERISASI METIL SELULOSA DARI BONGGOL DAN KULIT NANAS (Ananas comosus) Lena Rahmidar; Seruni Wahidiniawati; Tety Sudiarti
ALOTROP Vol 2, No 1 (2018)
Publisher : University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/atp.v2i1.4807

[MAKING AND CHARACTERIZATION OF CELLULOSE METHOD OF BONGGOL AND LEATHER LEATHER (Ananas comosus)] Wastes of core and peel of pineapple are often not utilized properly, in fact the waste has nutritional content that can be useful. Carbohydrate content in the waste is large enough and allows to be utilized. The purpose of this research is for converting glucose into cellulose and synthesized into methylcellulose. The first stage is glucose from core and peel of pineapple converted into microbial cellulose with Acetobacter xylinum bacteria with the addition of nitrogen and carbon sources. The second stage is synthesis of methylcellulose with methylene chloride and the solvent aquadest/acetone. The dried microbial cellulose was firstly swelled with NaOH addition, then methylation by addition of solvent and methylene chloride and then refluxed at 50-60. Then methyl cellulose neutralized, washed and dried at 50.The FTIR results showed typical cellulose uptake for cellulose microbial pineapple core at wave number 3377.36 cm-1 for OH bonds and 2935.66 cm-1 for CH bonds and in cellulose microbialpineapple peel at wave number 3377.36 cm-1 for OH bonds and 2935.66 cm-1 for the CH bonds. The ratio OH/CH of methyl cellulose-acetone has a smaller value in the core and peel of pineapple concluded that acetone is more efficient to use as a solvent at the methylation. The substitution value of the core and peel of pineapple skin is estimated to below based on the solubility test results.

SYNTHESIS OF ZrO2 VIA ULTRASONIC ASSISTED PRECIPITATION METHOD FOR PHOTODEGRADATION OF METHYLENE BLUE Soni Setiadji; Nur Tursina; Nanda Dwimar Hakim; Sanusi Sanusi; Tety Sudiarti; Dani Gustaman Syarif
Jurnal Keramik dan Gelas Indonesia Vol 30, No 1 (2021): Jurnal Keramik dan Gelas Indonesia
Publisher : Balai Besar Keramik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32537/jkgi.v30i1.6807

Zirconium dioxide (ZrO2) is a semiconductor material which its photocatalytic properties for degradation of methylene blue has been investigated in this research. ZrO2 was prepared from ZrCl4 solution by adding NaOH through precipitation method without ultrasonication, and also with ultrasonication for 1 h and 2 h. The specimens of ZrO2 were analyzed by X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM), and Brunauer-Emmett-Teller (BET). The XRD of all ZrO2 samples showed that the smallest ZrO2 crystal size was 8.149 nm based on Debye-Scherrer calculations for ultrasonic time of 2 h. The lattice parameter of ZrO2 under tetragonal phase was analyzed using Rietvield refinement by La Beil method. The specific surface area of all ZrO2 specimens were confirmed by BET. The result showed specific surface area of 99.741 m2/g for treatment with 2 h ultrasonication. The effect of ultrasonic assisted precipitation could increase the photocatalytic activity. This result showed that the degradation of methylene blue by ZrO2 with 2 h ultrasonication is higher than both by ZrO2 with 1 h ultrasonication and ZrO2 without ultrasonication with values of 93.00 %, 88.32 % and 77.53 % respectively, at 120 min irradiation, pH of 10 and 0.05 g of ZrO2

Sintesis Selulosa Suksinat dalam Cairan Ion 1-Butil-3-Metilimidazolium Klorida ([BMIM]CL) dengan Metode Microwave Assisted Organic Synthesis (MAOS) dan Penentuan Derajat Substitusinya Tety Sudiarti; D Wahyuningrum; B Bundjali; I M Arcana
Jurnal Kimia Terapan Indonesia Vol 18, No 01 (2016)
Publisher : Research Center for Chemistry - LIPI

Selulosa merupakan polimer alam yang sangat melimpah dan digunakansecara luas sebagai bahan mentah untuk berbagai aplikasi industri sepertifiber, kertas, membran, cat dll. Modifikasi selulosa dengan anhidrida suksinatmerupakan salah satu cara untuk memberikan nilai tambah pada selulosatersebut. Untuk meningkatkan kemampuan melarutkan dan efisiensimodifikasi selulosa, digunakan cairan ion 1-butil-3-metilimidazolium klorida([BMIM]Cl) sebagai pelarut. Metode microwave assisted organic synthesis(MAOS) dipilih karena dapat mempercepat laju reaksi, meningkatkan yielddan mengurangi produk samping. Tujuan penelitian ini adalah mensintesisselulosa suksinat dalam [BMIM]Cl dengan metode MAOS serta menentukanfaktor-faktor yang mempengaruhi derajat substitusi (DS) selulosa suksinatyang dihasilkan. Selulosa dilarutkan dalam [BMIM]Cl dengan berbagaiperbandingan dan direaksikan dengan anhidrida suksinat pada perbandinganselulosa:anhidrida suksinat = 1:10 menggunakan reaktor microwave padaberbagai kondisi reaksi (waktu, suhu, daya iradiasi microwave). Berdasarkanpengukuran spektrum FTIR terhadap produk diperoleh bahwa selulosasuksinat berhasil disintesis yang ditandai dengan munculnya puncak barupada bilangan gelombang 1722,43â€“1726,29 cm-1 yang merupakan pitaserapan untuk C=O ester dengan derajat substitusi pada rentang 0,66 â€“ 1,33.Kondisi pelarutan dan kondisi reaksi mempengaruhi derajat substitusiselulosa suksinat yang dihasilkan. Makin banyak [BMIM]Cl yang digunakan,makin tinggi derajat substitusi selulosa suksinat yang dihasilkan.Keywords : cellulose succinate, ionic liquid, [BMIM]Cl, MAOS method, degree of substitution

Facile Synthesis of ZnO Nanoparticles for the Photodegradation of Rhodamine-B Tety Sudiarti; Neng Hani Handayani; Yusuf Rohmatulloh; Silmi Rahma Amelia; Ravli Maulana Yusuf; Atthar Luqman Ivansyah
Jurnal Kimia Sains dan Aplikasi Vol 24, No 6 (2021): Volume 24 Issue 6 Year 2021
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

River pollution is a problem that is still very poorly handled. Industrial growth is the most significant contributor to produce this wastewater. The industry produces liquid waste such as dyes that do not meet handling standards because of the high cost. Photocatalyst is way better than other methods such as adsorption, coagulation, fluctuation, and others. However, there are still many shortcomings of the existing methods, such as high cost, high temperature, and dangerous by-products. This research seeks to provide a solution by synthesizing zinc oxide (ZnO) nanoparticles as a photocatalyst to reduce rhodamine B dye under visible light irradiation. ZnO nanoparticles were successfully synthesized through a simple sol-gel method in the form of a white powder by heating at a low temperature, 60°C. The XRD results show that the results have a diffraction peak that follows the standard ZnO with a hexagonal wurtzite crystal structure. According to the Scherrer equation, the crystal has a size of 22.61 nm. SEM analysis showed that the particle morphology and particle size were homogeneous with a spherical shape, ranging from 22-24 nm. Optimal ZnO photocatalytic activity at 90 minutes with an efficiency of 98.83%.

Title

Found 22 Documents
Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title Search

Found 22 Documents Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title

Found 22 Documents
Search