JURNAL SAINS NATURAL最新文献

{"title":"Isolation of β-caroten from Brown Tiger Shrimp shell waste (Penaeus esculentus) and its antioxidant activity using ABTS (2,2-azinobis- [3-ethylbenzothiazoline-6-sulfonicacid] method","authors":"Hendri Faisal, S. Handayani, Miranda Alvionita, Mayang Sari","doi":"10.31938/jsn.v11i2.299","DOIUrl":"https://doi.org/10.31938/jsn.v11i2.299","url":null,"abstract":"BrownTiger Shrimp (Penaeus esculentus) is a fishery export commodity that has high potential and categorize major commercial value.The waste in the form of shell produced from the shrimp industry has not been used properly and efficiently. In fact, most of it is waste that also pollutes the environment.Shrimp shell contained a lot of carotenoid pigments which are antioxidants, one of which is β-carotene.The aim of the study was to determine the amount of β-carotene and antioxidant activity in the chloroform extract of BrownTiger shrimp shell (Penaeus esculentus). The study used maceration method with chloroform to obtain β-carotene extract then the total content was measured using UV-Vis spectrophotometry.Testing the antioxidant activity of β-carotene and chloroform β-carotene extract of Brown Tiger shrimp shell (Penaeus esculentus) was carried out through free radical scavenging using the ABTS method (2,2-azinobis- [3-ethylbenzothiazoline-6-sulfonicacid]).Chloroform β-carotene extract of Brown Tiger shrimp shell (Penaeus esculentus) contained β-carotene 618.2 µg / g of extract (0.06182% per gram of extract), and had weak antioxidant activity with IC50 value of 396.660 mg/L.β-carotene as a comparison compound has an IC50 value of 114.838 with moderate antioxidant activity category. The conclusion of this study was the chloroform β-carotene extract of Brown Tiger shrimp skin (Penaeus esculentus) contained β-carotene compounds and had weak antioxidant activity index.Keywords: β-carotene, shrimp shell, Penaeus esculentus, antioxidant, ABTSABSTRAKIsolasi β–karoten limbah kulit udang tiger coklat (Penaeus Esculentus) dan aktivitas antioksidannya dengan metode ABTS(2,2-Azinobis- [3-Ethylbenzothiazoline-6-Sulfonicacid])Udang Tigercoklat (Penaeus esculentus) merupakan komoditas ekspor perikanan yang memiliki potensi tinggi dan dikategorikan sebagai udang yang memiliki nilai komersial utama. Limbah berupa kulit yang dihasilkan dari industri udang belum dimanfaatkan dengan baik dan efisien, bahkan sebagian besar merupakan limbah yang mencemari lingkungan. Kulit udang banyak mengandung pigmen karotenoid yang merupakan antioksidan, salah satunya adalah β-karoten. Tujuan dari penelitian ini adalah untuk mengetahui kadarβ-karoten dan aktivitas antioksidan ekstrak kloroform kulit udang Tigercoklat dengan menggunakan β-karoten sebagai pembanding. Penelitian ini menggunakan metode ekstraksi maserasi dengan kloroform untuk mendapatkan ekstrak kloroformβ-karoten dan mengukur kadarnya menggunakan spektrofotometri UV-Vis. Pengujian aktivitas antioksidan β-karoten dan ekstrak kloroformβ-karoten kulit udang Tigercoklat dilakukan melalui pemulungan radikal bebas menggunakan metode ABTS (2,2-azinobis-[3-ethylbenzothiazoline-6-sulfonicacid]). Ekstrak kloroform β-karoten kulit udang Tigercoklat mengandung β-karoten sebanyak 618,2 µg / g ekstrak (0,06182% per gram ekstrak), dan memiliki aktivitas antioksidan lemah dengan nilai IC50 396,660 mg/L. β-karoten sebagai senyawa pe","PeriodicalId":17812,"journal":{"name":"JURNAL SAINS NATURAL","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89274393","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Screening and morphological observations of endophytic mold origin of pennywort (Centella asiatica (L.) Urban) as extracellular enzyme producer","authors":"Muhamad Aditya Hidayah, Retno Aliyatul Fikroh*","doi":"10.31938/jsn.v11i2.304","DOIUrl":"https://doi.org/10.31938/jsn.v11i2.304","url":null,"abstract":"Pennywort is a biological plant that is included in the medicinal plant species. The analysis was carried out to obtain information and to find out that endophytic molds from pennywort (Centella asiatica (L.) Urban) can produce extracellular enzymes (amylase, cellulase, pectinase, protease, glucanase, and laccase). Based on the analysis that has been carried out, several conclusions are obtained, endophytic fungi from pennywort with isolate codes MB 20, MM 1, MM 6, MM 8, and MM 16 capable of producing extracellular amylase enzymes, endophytic fungi from pennywort with isolate codes MM 1, MM 12, MM 16, MM 18, MM 19, MM 20 and MM 21 were able to produce extracellular cellulase enzymes, endophytic fungi from pennywort with isolate codes MB 1, MB 3, MB 4, MB 6, MM 1, MM 9, MM 11, MM 13, MM 14, MM16, MM 19, MM 20 and MM 21 were able to produce extracellular glucanase enzymes, endophytic mold isolates from pennywort were proven to be unable to produce extracellular enzymes laccase, pectinase, and protease, and endophytic molds from pennywort with isolate codes MB 1, MB 20, MM 14 and the MM 16 is capable of producing siderophores.Keywords: Centella asiatica (L.) Urban, extracellular enzymes, endophytic typite, isolatesABSTRAKSkrining pengamatan morfologi kapang endofit asal tanaman pegagan (Centella asiatica (L.) Urban) sebagai penghasil enzim ekstraselulerTanaman pegagan merupakan tanaman hayati yang termasuk dalam jenis tanaman obat. Analisis dilakukan untuk mendapatkan informasi dan mengetahui bahwa kapang endofit asal tanaman pegagan (Centella asiatica (L.) Urban) dapat menghasilkan enzim ekstraseluler (Amilase, selulase, pektinase, protease, glukanase, dan lakase). Berdasarkan analisis yang telah dilakukan di peroleh beberapa kesimpulan, diantanya. yaitu kapang endofit asal tanaman pegagan dengan kode isolat MB 20, MM 1, MM 6, MM 8 dan MM 16 mampu menghasilkan enzim amilase ekstraseluler, kapang endofit asal tanaman pegagan dengan kode isolat MM 1, MM 12, MM 16, MM 18, MM 19, MM 20 dan MM 21 mampu menghasilkan enzim selulase ekstraseluler, kapang endofit asal tanaman pegagan dengan kode isolat MB 1, MB 3, MB 4, MB 6, MM 1, MM 9, MM 11, MM 13, MM 14, MM16, MM 19, MM 20 dan MM 21 mampu menghasilkan enzim glukanase ekstraseluler, isolat kapang endofit asal tanaman pegagan terbukti tidak mampu menghasilkan enzim ekstraseluler lakase, pektinase dan protease, dan kapang endofit asal tanaman pegagan dengan kode isolat MB 1, MB 20, MM 14 dan MM 16 mampu menghasilkan siderofor.Kata Kunci: Centella asiatica (L.) Urban, enzim ekstraseluler, kapang endofit,  isolat ","PeriodicalId":17812,"journal":{"name":"JURNAL SAINS NATURAL","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72828160","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"FITOREMEDIASI TANAH TERCEMAR LOGAM BERAT Cd DENGAN MENGGUNAKAN TANAMAN HANJUANG (Cordyline fruticosa)","authors":"Novi Permata Sari, N. Nurlela, Supriyono Eko Wardoyo","doi":"10.31938/jsn.v9i2.230","DOIUrl":"https://doi.org/10.31938/jsn.v9i2.230","url":null,"abstract":"Phytoremediationn of Cadmium (Cd) Contaminated Soil using Hanjuang Plants (Cordyline fruticosa)Phytoremediation of Cadmium (Cd) contaminated soil using ornamental plants is one method that applicable and environmental friendly in the process absorption of metal in the soil. This study aims to determine the effectiveness of phytoremediation and the potential of hanjuang plants as phytoremediation agents for cadmium metals. Hanjuang plants are planted on soil media which is previously added to heavy media as pollutants, namely Cd(NO3)2 with a concentration of 0; 50; 100; 150 mg/Kg for 42 days. Measurement of Cd concentration uses Inductively Coupled Plasma Optical Emission Spectrometry instrument. The results showed that hanjuang plants could accumulate cadmium metals in the roots. The highest accumulation is found in the roots of plants at 150 mg/Kg concentration and the result is 36.2167 mg/Kg, whereas in the stems and leaves of plants is not found heavy metal absorptions. Hanjuang plants contaminated with cadmium metal have a bioconcentration value (BCF)<1 so that they are included in the metal excluder group or low accumulator. The highest distribution of cadmium metal concentration is in the roots with transport factor (TF)<1 so that hanjuang plants are included in phytoremediation plants with their metal absorption which mechanism is phytostabilization.Keywords : Cordyline fruticosa, Phytoremediation, Cadmium, ICP-OESABSTRAKFitoremediasi tanah tercemar logam Kadmium (Cd) menggunakan tanaman hias merupakan salah satu metode yang aplikatif dan ramah lingkungan dalam proses penyerapan logam di dalam tanah. Penelitian ini bertujuan untuk mengetahui efektivitas fitoremediasi dan potensi tanaman hanjuang sebagai agen fitoremediasi dalam menyerap logam kadmium. Tanaman hanjuang ditanam pada media tanah yang sebelumnya media tanah tersebut ditambahkan logam berat sebagai pencemar yaitu Cd(NO3)2 dengan variasi konsentrasi 0; 50; 100; 150 mg/Kg selama 42 hari. Pengukuran konsentrasi Cd menggunakan instrumen Inductively Coupled Plasma Optical Emission Spectrometry. Hasil penelitian menunjukkan tanaman hanjuang dapat mengakumulasi logam kadmium pada bagian akar. Akumulasi tertinggi ditemukan pada bagian akar tanaman pada konsentrasi 150 mg/Kg sebesar 36,2167 mg/Kg, sedangkan pada bagian batang maupun daun tanaman tidak ditemukan adanya penyerapan. Tanaman hanjuang yang terkontaminasi oleh logam kadmium memiliki nilai biokonsentrasi (BCF)<1 sehingga termasuk ke dalam kelompok metal excluder atau akumulator rendah. Distribusi konsentrasi logam kadmium paling tinggi terdapat pada bagian akar dengan faktor transport (TF)<1 sehingga tanaman hanjuang termasuk ke dalam tanaman fitoremediasi dengan mekanisme penyerapan logamnya yaitu fitostabilisasi.Kata kunci : Cordyline fruticosa, Fitoremediasi, Kadmium, ICP-OES.","PeriodicalId":17812,"journal":{"name":"JURNAL SAINS NATURAL","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87960513","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"PENGIKATAN AFLATOKSIN B1 DENGAN HASIL EKSTRAKSI UMBI ILES-ILES (Amorpophallus oncophylus) SECARA INVITRO","authors":"Nentin Surtini, N. Yuliani, A. Susanto","doi":"10.31938/JSN.V5I2.262","DOIUrl":"https://doi.org/10.31938/JSN.V5I2.262","url":null,"abstract":"Aflatoksin B1 Binding with Tubers of Iles-Iles (Amorpophallus oncophylus) Extract on InvitroAnimal feed plays an important role in determining livestock productivity and food security for humans. Animal feed produced by the animal feed industry is still corn-soya based, its raw material composition is dominated by soybean and corn meal, which is easily contaminated with aflatoxin. Aflatoxin compounds known to cause disruption to both animals and humans, because it is carcinogenic. Some aflatoxin binding methods have been using glucomannan containing yeast product (GYP), hydrated sodium calcium aluminosilicate (HSCAS), zeolite, bentonite, kaolin, and activated carbon, and this method is imported so the price is quite expensive. This study aims to test the ability of extracted iles-iles as a binder of aflatoxin B1 in feed in vitro. The results showed that iles-iles extract can bind aflatoxin well like glucomannan from Mycosorb although the binding of Aflatoxin by Amorphophalus extract is less bound than the binder of Mycosorb. Giving extracts weighing 41.25; 82.1 and 102.75 mg have the aflatoxin binding ability with a 3.88-axis increase in succession; 6.25 and 5.97 ppb or as high as 9.86; 15.8; 15.2%. The binding of aflatoxin with glucomannan from the mycosorb product was able to absorb 27.10% aflatoxin in 41.25 mg binder weight and decrease in binder material 82.1 mg (19.63%) and 102.75 mg (23.97% ).Keywords: Aflatokin B1, iles-iles tubers, glucomannanABSTRAKPakan ternak memiliki peran penting karena menentukan produktivitas ternak maupun keamanan pangan bagi manusia. Pakan ternak yang diproduksi oleh industri pakan ternak masih berbasis corn-soya, komposisi bahan bakunya didominasi oleh bungkil kedelai dan jagung, yang mudah terkontaminasi aflatoksin. Senyawa aflatoksin diketahui dapat menimbulkan gangguan baik pada hewan maupun manusia, karena bersifat karsinogenik.  Beberapa metode pengikatan aflatoksin selama ini menggunakan glucomannan containing yeast product (GYP) (Mycosorb®), hydrated sodium calcium aluminosilicate (HSCAS), Zeolit, bentonit, kaolin, dan karbon aktif dan metode ini bahannya berasal dari import sehingga harganya cukup mahal. Penelitian ini bertujuan untuk menguji kemampuan hasil ekstraksi iles-iles sebagai pengikat aflatoksin B1 dalam pakan secara in vitro.  Hasil  penelitian didapat bahwa  ekstrak iles-iles dapat mengikat aflatoksin dengan baik seperti glukomanan dari  Mycosorb walaupun pengikatan Aflatoksin oleh ekstrak Amorphophalus lebih sedikit terikatnya dibandingkan dengan pengikat dari Mycosorb. Pemberian ekstrak dengan berat 41,25 ; 82,1 dan 102,75 mg memiliki  kemampuan mengikat  aflatoksin dengan  kecenderungan meningkat secara berturut turut 3,88; 6,25 dan 5,97 ppb atau sebesar 9,86; 15,8; 15,2%. Pengikatan aflatoksin dengan glukomannan dari produk mycosorb mampu menyerap 27,10% aflatoksin pada penggunaan bahan berat pengikat 41,25 mg dan menurun pada bahan berat bahan pengikat 82,1 mg (19,63%) dan 102,75 mg (23,","PeriodicalId":17812,"journal":{"name":"JURNAL SAINS NATURAL","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82219940","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"ANGKA KAPANG DAN KHAMIR PADA LADA PUTIH ASAL BANGKA","authors":"Oktavio Rosani, Devy Susanty, Ary Triyanto","doi":"10.31938/JSN.V5I2.260","DOIUrl":"https://doi.org/10.31938/JSN.V5I2.260","url":null,"abstract":"Numbers of Mold and Yeast on White Pepper from BangkaWhite pepper is one of Indonesia's spices that are needed for both public consumption and exports. Post-harvest processing of white pepper by farmers is often done with unclean. Each source of white pepper has different water content and will affect the quality of white pepper. In this study, seven samples (S1, S2, S3, S4, S5, S6, S7) were from Bangka. All samples tested had higher water content than SNI quality standard (13%), but still below the quality standard 2 (18%). Sample S2 has the highest water content compared to other samples. Sample S1 and S2 have high Numbers of Mold and Yeast (AKK) and do not suitable with quality standart of BPOM. Of all samples, S2  had the highest AKK (5,51 x 104 colony / g) and sample S5 had the smallest AKK (8,8 x 102 colony / g). This shows the relationship between water content in white pepper with AKK. White pepper that has a high water content has a high AKK, whereas white pepper that has low moisture content has low AKK.Keywords: white pepper, Numbers of Mold and Yeast, moisture contentABSTRAKLada putih adalah salah satu rempah Indonesia  yang  banyak dibutuhkan baik untuk konsumsi masyarakat ataupun ekspor. Proses pengolahan pasca panen lada putih oleh petani sering dilakukan dengan tidak bersih. Setiap sumber lada putih memiliki kadar air yang berbeda dan akan mempengaruhi kualitas lada putih. Pada penelitian ini,tujuh sampel (S1, S2, S3, S4, S5, S6, S7)  berasal dari Bangka. Semua sampel yang di uji memiliki kadar air yang lebih tinggi dari standar mutu 1 SNI (13%), namun masih berada di bawah standar mutu 2 (18 %). Sampel S2 memiliki kadar air yang paling tinggi dibandingkan dengan sampel lainnya. Sampel S1 dan S2 memiliki  (Angka Kapang Khamir) AKK yang tinggi dan tidak memenuhi syarat mutu. BPOM. Dari semua sampel, sampel S2 memiliki AKK paling tinggi (5,51 x 104 koloni/g) dan sampel S5 memiliki AKK paling kecil (8,8 x 102 koloni/g). Hal ini menunjukan hubungan antara kadar air pada lada putih dengan AKK. Lada putih yang memiliki kadar air tinggi memiliki AKK yang juga tinggi, sedangkan lada putih yang memiliki kadar air rendah memiki AKK yang  rendah.Kata Kunci: Lada putih, Angka kapang khamir, Kadar Air","PeriodicalId":17812,"journal":{"name":"JURNAL SAINS NATURAL","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89350655","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"KADAR FOSFAT DALAM AIR SUNGAI CIKANIKI","authors":"Raymona Rosilla, Mia Azizah, D. Setiawati","doi":"10.31938/JSN.V5I2.263","DOIUrl":"https://doi.org/10.31938/JSN.V5I2.263","url":null,"abstract":"Phosphate Content in Cikaniki RiverThe Cikaniki River is one of the tributaries of Cisadane, which crosses the provinces of West Java and Banten. This river has a very high function and value for human life and water ecosystem. Phosphates formed naturally in formed of rock and undergo a weathering process, rocks gradually break down into phosphate ions dissolved in water. Phosphates in orthophosphates are produced by nature and are found in waste, whereas polyphosphates are often used in detergents, but in water the form of poly will turn into an ortho form. The analysis to find out the phosphate content in Cikaniki River. Phosphate analysis of river water refers to SNI 06-6989.31-2005, using the uv-vis spectrophotometric method in ascorbic acid. The results showed that the phosphate content in Cikaniki River still fulfilled the Standard Quality of PP no. 82 of 2001, is <0.2 mg / L except in Kampung Babakan Liud area. Phosphate contamination in river water can be derived from natural processes as well as from the addition of contamination due to human activities in the form of agriculture, industry, and household activities and the presence of excessive phosphate can lead to explosive growth of algae in the waters.Keywords: River, Phosphate, ascorbic acid, wasteABSTRAKSungai Cikaniki adalah salah satu anak sungai Cisadane, yang melintasi Provinsi Jawa Barat dan Banten. Sungai ini memiliki fungsi dan nilai yang sangat tinggi bagi kehidupan manusia dan ekosistem air. Fosfat terjadi secara alami dalam bentuk batuan dan mengalami proses pelapukan, batuan secara bertahap mengurai menjadi ion fosfat yang larut dalam air. Fosfat dalam bentuk ortofosfat diproduksi oleh alam dan ditemukan di limbah, sedangkan polifosfat sering digunakan dalam detergen, tetapi di dalam air bentuk poli akan berubah menjadi bentuk orto. analisis untuk mengetahui kandungan fosfat di Sungai Cikaniki. Analisis fosfat pada air sungai mengacu kepada SNI 06-6989.31-2005, menggunakan metode spektrofotometri uv-vis secara asam askorbat. Hasil penelitian menunjukkan kadar Fosfat di Sungai Cikaniki masih memenuhi Baku Mutu PP No. 82 Tahun 2001, yaitu  < 0,2 mg/L kecuali pada daerah  Kampung Babakan Liud. Pencemaran Fosfat di air sungai dapat berasal dari proses alamiah  maupun berasal dari penambahan cemaran akibat aktifitas manusia yang berupa pertanian, perindustrian, maupun kegiatan rumah tangga dan keberadaan fosfat yang berlebihan dapat menyebabkan terjadinya ledakan pertumbuhan alga di perairan.Kata Kunci: Sungai, Fosfat, asam askorbat, limbah","PeriodicalId":17812,"journal":{"name":"JURNAL SAINS NATURAL","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80189643","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"PENGARUH RESIN TERHADAP PERUBAHAN WARNA PADA CAT TEMBOK","authors":"N. Nurlela, Risnawati Risnawati","doi":"10.31938/JSN.V5I2.264","DOIUrl":"https://doi.org/10.31938/JSN.V5I2.264","url":null,"abstract":"The Influence of Resin against the Change of Color on the Wall PaintThe quality of the paint is determined by the resin used. Synthetic resins for polymer paints are made by combining several monomers to achieve various characteristics. The incorporation of some monomers such as polyvinyl acetate resin, acrylic vinyl resin and acrylic styrene resin which act as a binder can affect the quality of the paint especially the color change. The purpose of this study is to find the color changes that occur on the wall paint by using Poly Styrene Acrylic , Poly Vinyl Acetate and Poly Vinyl Acrylic. From the results of the measurement of color difference, significant color change occurs in the Poly Vinyl Acetate (PVAc) + Poly Vinyl Acrylic (PVA) and Poly Styrene Acrylic (PSA). The results of the quality test of the three resins based on pH test, scrub test and viscosity test, PSA has better quality compared to PVA + PVAc and PVA resin. From the color difference measurement test, some things need to be considered, are temperature, film thickness, substrate color/background color and measurement conditions (measured in wet sample/in plate/dry surface) and test on resin added additive according to the type of each resin.Keywords: Paint, Resin, Color Changes, Poly Vinyl Acetate, Poly Styrene.ABSTRAK Kualitas dari cat sangat ditentukan oleh resin yang digunakan. Resin sintetis untuk cat berupa polimer yang dibuat dengan menggabung beberapa monomer untuk mencapai berbagai karakteristik. Penggabungan dari beberapa monomer seperti resin poli vinil asetat, resin vinil akrilik dan resin stirena akrilik yang berfungsi sebagai pengikat mampu mempengaruhi kualitas cat terutama dari perubahan warna. Tujuan dari penelitian ini adalah untuk mengetahui perubahan warna yang terjadi pada cat tembok dengan menggunakan Poli Stirena Akrilik, Poli Vinil asetat dan Poli Vinil Akrilik. Dari hasil pengukuran perbedaan warna, perubahan warna cukup signifikan terjadi pada resin Poli vinil Asetat (PVAc) + Poli Vinil Akrilik (PVA) dan resin  Poli Stirena Akrilik (PSA). Hasil uji Kualitas cat dari ketiga resin berdasarkan uji pH, uji scrub dan uji viscositas, PSA memiliki kualitas yang lebih baik dibandingkan dengan resin PVA+PVAc dan PVA. Dari pengujian pengukuran perbedaan warna, beberapa hal yang perlu di perhatikan, yaitu suhu, film thickness, warna substrat/background color dan kondisi pengukuran (diukur dalam keadaan wet sample/dalam bentuk plate/dry surface) dan pengujian terhadap resin yang ditambahkan zat aditif yang sesuai dengan tipe masing-masing resin tersebut.Kata Kunci: Cat, Resin, Perubahan Warna, Poli Vinil, Poli Stirena.","PeriodicalId":17812,"journal":{"name":"JURNAL SAINS NATURAL","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81877289","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"FERMENTASI TALAS BELITUNG (Xanthosoma sagittifolium (L.) Schott) DENGAN VARIASI RAGI DAN PENAMBAHAN NUTRISI DALAM","authors":"M. Mardiyah, Srikandi Srikandi, Rtm Sutamihardja","doi":"10.31938/JSN.V5I2.261","DOIUrl":"https://doi.org/10.31938/JSN.V5I2.261","url":null,"abstract":"Fermentation of Belitung Taro (Xanthosoma sagittifolium (L.) Schott) with variation of Yeast and Adding Nutrition to Produce Ethanol Plants that are potential to produce bioethanol are plants that have sugar or carbohydrate levels one of which is Belitung taro (Xanthosoma sagittifolium). This research aims to make bioethanol with simple fermentation process with variation on yeast type (bread yeast and tape yeast) and with the addition of nutrients (NPK fertilizer) to obtain maximum bioethanol content. This research was begun by making taro pulp with four treatments and each treatment repeated 3 times. The four treatments consist of taro belt with yeast bread, yeast bread and NPK, yeast tape, yeast tape and NPK. Observations were performed on days 2, 4, 6, 7, 14 which included observation of pH and ethanol content. In addition, proximate test is also done. The results showed that the highest ethanol content in the fermentation process with yeast yeast occurred on the 7th day of 3.64% while in the yeast tape the highest level occurred on the 4th day of 3.07%. Addition of NPK can not produce maximum ethanol content. For proximate test, the result showed that the content of ash is high enough that is 4.57% while for carbohydrate, protein, fat, coarse fiber, and moisture content obtained results equivalent to the literature.Keywords: Ethanol, Fermentation, Belitung Taro, Bioethanol ABSTRAKTumbuhan yang potensial untuk menghasilkan bioetanol adalah tanaman yang memiliki kadar gula atau karbohidrat salah satunya yaitu talas belitung (Xanthosoma sagittifolium). Penelitian ini bertujuan untuk membuat bioetanol dengan proses fermentasi sederhana dengan variasi pada jenis ragi (ragi roti dan ragi tape) serta dengan penambahan nutrisi (pupuk NPK) sehingga didapatkan kadar bioetanol yang maksimal. Diawali dengan membuat bubur talas belitung dengan empat perlakuan dan setiap perlakuan diulang 3 kali. Empat perlakuan terdiri atas talas belitung dengan ragi roti, ragi roti dan NPK, ragi tape, ragi tape dan NPK. Pengamatan dilakukan pada hari ke 2, 4, 6, 7, 14 yang meliputi pengamatan pH dan kadar etanol. Selain itu dilakukan juga uji proksimat. Hasil penelitian menunjukkan bahwa kadar etanol tertinggi pada proses fermentasi dengan ragi roti terjadi pada hari ke-7 yaitu 3,64% sedangkan pada ragi tape  kadar tertinggi terjadi pada hari ke-4 yaitu 3,07%. Penambahan NPK tidak dapat menghasilkan kadar etanol yang maksimal. Untuk pengujian proksimat didapatkan kadar abu yang cukup tinggi yaitu 4,57% sedangkan untuk kadar karbohidrat, protein, lemak, serat kasar, dan kadar air didapatkan hasil yang setara dengan literatur.Kata Kunci : Etanol, Fermentasi, Talas Belitung, Bioetanol","PeriodicalId":17812,"journal":{"name":"JURNAL SAINS NATURAL","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84021756","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"PERBANDINGAN HIDROLISIS ENZIMATIS DAN ASAM TERHADAP PATI JAGUNG MANIS (Zea mays L.) DALAM PEMBUATAN GULA CAIR","authors":"Rtm Sutamihardja, Mia Azizah, Bekti Dwisepti Mafiana","doi":"10.31938/JSN.V7I2.255","DOIUrl":"https://doi.org/10.31938/JSN.V7I2.255","url":null,"abstract":"Comparison Hydrolisis of Enzymatic and Acid of  Sweet Corn Starch (Zea mays L.) in Liquid Sugar ProductionSweet corn starch (Zea mays L.) contains high carbohydrate that can be used for food and industrial purposes. Sweet corn starch can be used for liquid sugar as alternative sweetener by enzymatic or acid hydrolysis. The enzymatic hydrolysis was performed by treating the starch with alpha amylase for liquefaction and glucoamylase for saccharification, while acid hydrolysis was performed by mixing the starch with 1,0 N hydrochloric acid. According to the results, the yield of enzymatic hydrolysis is higher than acid hydrolysis. The highest yield of liquid sugar is 91,73% produced by enzymatic hydrolysis using alpha amylase 42µL and glucoamylase 42µL and 59,40% of reducing sugar. The yield of liquid sugar produced by acid hydrolysis using HCl 1,0 N is 78,55% and 31,48% of reducing sugar.Key words: Zea mays, starch, liquid sugar, hydrolisis of hydrochloric acid, hydrolisis of alpha amylase, hydrolisis of glucoamylaseABSTRAKPati jagung manis (Zea mays L.) mengandung karbohidrat cukup tinggi yang dapat dimanfaatkan untuk bahan pangan dan industri. Pati jagung manis dapat diolah menjadi gula cair dan digunakan sebagai pemanis alternatif melalui hidrolisis pati baik secara enzimatis atau asam. Hidrolisis enzimatis melalui tahap likuifikasi menggunakan alfa amilase dan tahap sakarifikasi menggunakan glukoamilase. Hidrolisis asam dilakukan menggunakan asam klorida 0,1 N. Hasil penelitian menunjukkan bahwa gula cair hasil hidrolisis enzimatis menghasilkan rendemen lebih tinggi dibandingkan hidrolisis asam. Rendemen gula cair paling tinggi dihasilkan pada proses hidrolisis enzimatis menggunakan alfa amilase 42µL dan glukoamilase 42µL sebesar 91,73% dengan nilai gula pereduksi sebesar 59,40%. Rendemen gula cair hidrolisis asam menggunakan HCl 1,0 N sebesar 78,55% dengan nilai gula pereduksi sebesar 31,48%.Kata kunci: Zea mays, pati, gula cair, hidrolisis HCl, hidrolisis enzim alfa-amilase, hidrolisis enzim glukoamilase","PeriodicalId":17812,"journal":{"name":"JURNAL SAINS NATURAL","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78042222","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"KANDUNGAN KIMIA DARI LIMBAH LUMPUR INSTALASI PENGOLAHAN AIR MINUM UNTUK BETON GEOPOLIMER DENGAN XRF","authors":"Nuryanti Nuryanti, Ridha Arizal, Dian Arrisujaya","doi":"10.31938/JSN.V7I2.254","DOIUrl":"https://doi.org/10.31938/JSN.V7I2.254","url":null,"abstract":"Chemical Containt of Waste Water Installation of Drinking Water Treatment for Geopolymer Concrete by XRF Preparation of geopolymer concrete from waste water installation of drinking water treatment (WIDWT) was manufactured in accordance with SNI. Specimen of size 5 x 5 x 5 cm cubes was used for the concretes. The mortar material consisted of binders, activator, aggregate (fine sand) and water (60% of aggregate and 40% of activators and binders). The composition of the activator and binder mixture were 1: 2; 1: 1,5; 1: 1; 1.5: 1; and 2: 1. The results of the comparison of binders A and B were 4.2: 1 and 6.5: 1. The binders were divided into 2 types: A binder (sludge of WIDWT was dried with oven at 105oC for 24 hours) and B Binder (sludge of WIDWT was dried by kiln at 650oC for 6 hours). The highest compressive strength test was 10.00 MPa on binder A with the ratio of activator and binder 1: 1 and Si: Al ratio (4.2: 1). Binder B with a compressive strength of 9.87 MPa with the ratio of activator and binder 1.5: 1 and Si: Al ratio (6.5: 1). Samples of IPAM sludge waste were tested by X-Ray Fluorescence (XRF), compressive strength testing of mortar geopolymer with Toni-Technik compressive strength test. The highest value of compressive strength appropriated to SNI 03-0691-1996 in class D which can be applied for City Park.Keywords: geopolymer, WIDWT, XRF, activator, binder ABSTRAK Pembuatan beton geopolimer dari limbah instalasi pengolahan air minum (IPAM) telah dilakukan. Beton geopolimer dibuat sesuai dengan SNI pembuatan mortar geopolimer dengan ukuran 5 x 5 x 5 cm. Bahan mortar terdiri dari binder, larutan aktivator dan agregat (pasir halus) serta air dengan perbandingan 60% (agregat) dan 40%(aktivator dan binder). Parameter variasi campuran aktivator dan binder yaitu 1:2; 1:1,5; 1:1; 1,5:1; dan 2:1. Binder dibagi menjadi 2 jenis yaitu Binder A (lumpur IPAM yang dikeringkan dengan oven pada suhu 105oC selama 24 jam) dan Binder B (lumpur IPAM yang dikeringkan dengan tanur pada suhu 650oC selama 6 jam). Hasil perbandingan binder A dan B adalah 4,2:1 dan 6,5:1. Hasil uji kuat tekan tertinggi sebesar 10,00 Mpa pada binder A dengan perbandingan aktivator dan binder 1:1 dengan perbandingan Si:Al (4,2:1). Binder B dengan kuat tekan 9,87 Mpa dengan perbandingan aktivator dan binder 1,5:1 dengan perbandingan Si:Al (6,5:1). Sampel limbah lumpur IPAM diuji dengan X-Ray Flourescene (XRF), pengujian kuat tekan mortar geopolimer dengan alat uji kuat tekan merk Toni-Technik. Nilai kuat tekan tertinggi memasuki persyaratan mutu SNI 03-0691-1996 pada kelas D yang bisa diaplikasikan untuk taman kota.Kata Kunci: geopolimer, IPAM, XRF, aktivator, binder","PeriodicalId":17812,"journal":{"name":"JURNAL SAINS NATURAL","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82360590","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}