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All Journal Jurnal Ilmu Lingkungan Jurnal Sains dan Teknologi Agrointek Jurnal Online Mahasiswa (JOM) Bidang Pertanian Jurnal Teknologi Pertanian Jurnal Litbang Industri Warta IHP (Warta Industri Hasil Pertanian) CHEMPUBLISH JOURNAL Industria: Jurnal Teknologi dan Manajemen Agroindustri Journal of Applied Agricultural Science and Technology Jurnal Teknologi & Industri Hasil Pertanian Journal of Tropical AgriFood Jurnal Pengendalian Pencemaran Lingkungan (JPPL) Unri Conference Series: Community Engagement Dinamika Lingkungan Indonesia Journal of Community Engagement Research for Sustainability Sagu Jurnal Litbang Industri Journal of Applied Agricultural Science and Technology JURNAL AGROINDUSTRI HALAL Teknologi dan Industri Pertanian Indonesia Journal of Engineering Science and Technology Management Prosiding Seminar Nasional Hasil Penelitian dan Pengabdian Kepada Masyarakat JP2N: Jurnal Pengembangan Dan Pengabdian Nusantara

Yelmira Zalfiatri

Unknown Affiliation

Author-ID : 576943

Religion Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Library & Information Science Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Nursing Public Health Social Sciences Transportation Other

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PEMANFAATAN SIMBIOSIS MIKROALGA Chlorella sp. DAN STARBACT® UNTUK MENURUNKAN KADAR POLUTAN LIMBAH CAIR SAGU Fajar Restuhadi; Yelmira Zalfiatri; Dini Aji Pringgondani
Jurnal Ilmu Lingkungan Vol 11, No 2 (2017): Jurnal Ilmu Lingkungan
Publisher : Program Pascasarjana Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jil.11.2.p.140-153

The puspose of this research was to study the symbiotic system of a complex microorganisms contained in Starbact® as a decomposer agent with the addition of photosynthetic microoalgae Chlorella sp. as an oxygen producer in reducing organic loads of sago milling effluent. The experimental design was Completely Randomized Design (CRD) with 5 treatments and 3 replications. The treatments were concentration variations of Starbact® (0, 0.135, 0.270, 0.405, and 0.540 per cent v/v, respectively) with 800 ml/L (6,6 x 106 cell/ml) microalgae Chlorella sp. added up with waste sago milling effluent into total of 2 liters of the liquid. The data obtained were analyzed statistically using Analiysis of Variance (ANOVA) and Duncan’s Multiple Range Test (DNMRT) at 5% level. The result showed that the addition of Starbact microorganisms had significant affect for COD, BOD, TSS, Nitrate, Phospate, DO and pH. The treatment chosen from the result of this research was the P4 treatment showed the highest level of reduction which had the value of COD 88,04%, BOD of 85,27%, TSS of 71,67%, Phospate of 48,21%, Nitrate of 71,06%. The result also showed an increasing of DO as much as 3 times from 1.85 mg/L into 5.91 mg/L, while pH increased significantly from 4.1 into 7.4.

KINETIKA REAKSI SODIUM LIGNOSULFONAT DENGAN PROSES AMINO ALKILASI PADA VARIASI KONSENTRASI OLEYL AMINE Yelmira Zalfiatri; Supranto Supranto; Suryo Purwono
Jurnal Sains dan Teknologi Vol 12, No 2 (2013): Jurnal Sains dan Teknologi
Publisher : Fakultas Teknik Universitas Riau

Surfaktan (surface active agent) merupakan salah satu bahan kimia yang dapat menurunkan tegangan antar muka fasecair. Salah satu contohnya adalah Sodium Ligno Sulfonat (SLS) yang bermanfaat untuk meningkatkan perolehan padakilang minyak. Akan tetapi, kandungan Natrium Bisulfat pada Sodium Ligno Sulfonat dapat mengurangi kinerjaSodium Ligno Sulfonat. Salah satu cara meningkatkan kinerja Sodium Lignosulfonat dengan memodifikasikan denganpenambahan Oleyl Amin dan Formaldehid atau dikenal dengan proses Amino Alkilasi. Penelitian ini bertujuan untukmenentukan kinetika reaksi dan pengaruh variasi konsentrasi Oleyl Amin. Proses Amino Alkilasi dilakukan secarabatch dalam reaktor tangki berpengaduk dengan kecepatan pengadukan 250 rpm dan penambahan Formaldehid 15 ml.Proses Amino Alkilasi dilakukan dengan menvariasikan konsentrasi Oleyl Amin (10%, 20%, 30% dan 40%)dan waktureaksi (1,2,3 dan 4 jam). Berdasarkan hasil penelitian menunjukkan bahwa kinetika reaksi oleh reaksi kimia denganpemodelan reaksi cair-cair yaitu reaksi Sodium Ligno Sulfonat dengan Oleyl Amin. Proses Amino Alkilasi mendekatiReaksi Tingkat Dua Bimoleculer dan Reaksi Tingkat Tiga Trimoleculer. Konversi tertinggi pada Proses Amino Alkilasimencapai 0,861pada kondisi Oleyl Amin 40%lama reaksi 4 jam. Model yang sesuai untuk penelitian ini adalah reaksiirreversible tingkat dua (bimolekuler). Perolehan nilai tegangan antar muka Proses Amino Alkilasi sebesar 0,191 Mn/m.Kata Kunci : Proses Amino Alkilasi, Sodium Ligno Sulfonat, Oleyl Amin, Formaldehid, Kinetika Reaksi

Aktivitas Antioksidan dan Mutu Sabun Transparan Ekstrak Umbi Bit (Beta vulgaris L.) Candra Efendi Hasibuan; Dewi Fortuna Ayu; Yelmira Zalfiatri
Warta Industri Hasil Pertanian Vol 38, No 1 (2021)
Publisher : Balai Besar Industri Agro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32765/wartaihp.v38i1.6550

Umbi bit (Beta vulgaris L.) terbukti memiliki aktivitas antioksidan sehingga dapat digunakan dalam sediaan yang diaplikasikan pada kulit untuk menangkal radikal bebas. Pemanfaatan ekstrak umbi bit diharapkan menghasilkan sabun transparan guna memberi pelindungan kulit dari radikal bebas. Penelitian ini mengkaji pengaruh penambahan ekstrak umbi bit terhadap aktivitas antioksidan dan kualitas sabun padat transparan. Perlakuan yang diberikan adalah variasi penambahan ekstrak umbi bit, antara lain UP1 (0 ml), UP2 (2,5 ml), UP3 (5 ml), UP4 (7,5 ml), dan UP5 (10 ml) dalam formulasi sabun transparan. Penambahan ekstrak umbi bit secara signifikan mempengaruhi aktivitas antioksidan, kadar air, asam lemak bebas, tingkat keasaman (pH), stabilitas busa, serta karakteristik sensori sabun transparan. Perlakuan UP5 merupakan perlakuan terbaik dengan aktivitas antioksidan 95,58 ppm, kadar air 16,00%, asam lemak bebas 0,43%, pH 9,87, stabilitas busa 79,74%, dan uji eritema 0,05 (hampir tidak nampak). Penilaian secara deskriptif terhadap sabun transparan menunjukan bahwa sabun berwarna cokelat, agak beraroma umbi bit, dan tekstur agak lembut.

PEMBUATAN SABUN TRANSPARAN DENGAN PENAMBAHAN EKSTRAK BATANG PEPAYA SEBAGAI ANTIBAKTERI yelmira zalfiatri; Faizah Hamzah; Marita TM Simbolon
CHEMPUBLISH JOURNAL Vol. 3 No. 2 (2018): Chempublish Journal
Publisher : Universitas Jambi, Fakultas Sains dan Teknologi, Program Studi Kimia

Penelitian ini bertujuan untuk mendapatkan jumlah penambahan ekstrak batang pepaya dalam menghambat pertumbuhan Escherichia coli dan Staphylococcus aureus dalam pembuatan sabun transparan. Penelitian menggunakan rancangan acak lengkap yang terdiri dari 4 perlakuan dan 4 ulangan. Perlakuan dalam penelitian ini adalah batang pepaya ml (P1), penambahan ekstrak batang pepaya 15 ml (P2), penambahan ekstrak batang pepaya 20 ml (P3), penambahan ekstrak batang pepaya 25 ml (P4). Parameter yang diamati adalah kadar air, kadar asam lemak, asam lemak bebas / alkali bebas, pH, stabilitas busa, uji antibakteri dan uji iritasi. Hasil penelitian menunjukkan bahwa penambahan ekstrak batang pepaya berpengaruh nyata terhadap kadar air, kadar asam lemak, asam lemak bebas, pH, stabilitas busa, uji antibakteri dan uji iritasi. Perlakuan yang dipilih dalam penelitian ini adalah perlakuan P3 (penambahan ekstrak batang pepaya 20mg / ml) dengan kadar air 13,24%, asam lemak total 27,00, asam lemak bebas 1,73%, pH, 11,06, stabilitas busa 90,99%, aktivitas antibakteri terhadap S. aureus 8.57 mm dan E.coli 10.33 mm, iritasi erythema 0.05 (hampir tidak terlihat).

Karakteristik biodiesel dari minyak jelantah menggunakan katalis abu gosok dengan variasi penambahan metanol Yelmira Zalfiatri; Fajar Restuhadi; Rizky Zulhardi
CHEMPUBLISH JOURNAL Vol. 4 No. 1 (2019): Chempublish Journal
Publisher : Universitas Jambi, Fakultas Sains dan Teknologi, Program Studi Kimia

Biodiesel is the reaction esterification and transesterification between oil and alcohol. Biodiesel raw materials in the form of vegetable oil, one of which is Waste Cooking Oil (WCO). This study aims to obtain the addition of the best methanol in the manufacture of biodiesel from cooking oil. The research method used Randomized Complete Design (RAL) with M1 treatment (methanol 65 ml), M2 (methanol 75 ml), M3 (methanol 85 ml) and M4 (95 ml methanol). The best result was obtained with addition of 95 ml of methanol (M4) with 0.42 mg KOH / g, total glycerol 0,08%, flash point 227 ° C, saponification number 123,46 mg KOH / g and methyl ester 99 , 4%.

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

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%.

ANALISIS PEMETAAN KESUKAAN KONSUMEN PADA PRODUK BOLU KEMOJO DI KALANGAN MAHASISWA FAKULTAS PERTANIAN UNIVERSITAS RIAU Rika Afrianto; Fajar Restuhadi; Yelmira Zalfiatri
Jurnal Online Mahasiswa (JOM) Bidang Pertanian Vol 4, No 2 (2017): Wisuda Oktober Tahun 2017
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Pertanian

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The purpose of this research was to determine the position of the product and the best sponge kemojo attributes from various kinds of sponge kemojo are used, such sponge Kemojo Cik Puan, sponge Kemojo Khadizah, sponge Kemojo Mega Rasa, sponge Kemojo Kembang Sari, sponge Kemojo Insan Sukses, sponge Kemojo Helmi, sponge Kemojo AL-Mahdi. To determine the level of consumer preference to a product. In addition there was still a lack of effort in developing products towards the manufacturer at this time. This research was conducted by mapping methods of internal and external preferences with objects of eight different product types. Sensory analysis used were hedonic and descriptive test. The results of cluster analysis of hedonic test and the main component analysis of the descriptive test were then analyzed by using the preference mapping technique, with the sensory attributes used in sponge kemojo products taste pandanus, sweetness, burning, testeful, green color, aroma of eggs, caramel, tenderness in the mouth, legit, vacancy rate, subtlety of texture. From the results of the analysis conducted, the productssponge sponge Cik Puan products and sponge Kembang Sari most favored by the panelists.Keyword:sponge kemojo, preference mapping.

Konsentrasi Perekat Pati Sagu Terhadap Karakteristik Briket Bioarangdari Limbah KulitBuah Durian Yulia Citra; Farida Hanum Hamzah; Yelmira Zalfiatri
Jurnal Online Mahasiswa (JOM) Bidang Pertanian Vol 5 (2018): Edisi 2 Juli s/d Desember 2018
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Pertanian

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Increasing need of energy and decreasing of fuel supply requires human to discover alternative energy resources. Consequently, there should be a research to discover a new renewable energy source such as durian fruit leather. Durian is biomass that has great potential for bio-briquet. This research aims to discover the precise adhesive consentration rate in sago’s starch , which are 3%, 5%, and 7%. Based on analytical result of durian leather charcoal briquet research, the best quality briquet is the P1 consentration which composed rate are 3%, has 4.04% water content, 19.14% ashes content, 5.502 cal/g heat value, and 0.0017 g/sekoncombustion rate. Keywords: briquet, durian fruit leather, sago starch.

PEMANFAATAN DAUN KATUK (Sauropus adrogynus) DALAM PEMBUATAN TEH HERBAL DENGAN VARIASI SUHU PENGERINGAN Wulan Kumala Dewi; Noviar Harun; Yelmira Zalfiatri
Jurnal Online Mahasiswa (JOM) Bidang Pertanian Vol 4, No 2 (2017): Wisuda Oktober Tahun 2017
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Pertanian

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The purpose of this research was to know the effect temperature of drying for aktivity katuk leaf herbal tea. Drying katuk leaf herbal tea used with temperature 40°C, 45°C, 50°C, 55°C for 2 hours. This study used Randomized Block Design (RAK) with 4 treatments and 4 replications to get 16 experimental units. The data obtained were analyzed by analysis of variance (ANOVA). If the test results show F arithmetic greater or equal to F table then tested further with Duncan New Multiple Range Test (DNMRT), at 5% level to know the difference of influence on each treatment. The results showed that moisture content of 6.49-3.87%, ash content of 1.23-1.27% and antioxidant 14.08-56.06μg/ml. The results of the study indicate that for the overall assessment that the panelists rather like to love the leaves produced katuk herbal tea. Keywords: Leaves katuk, herbal tea and drying.

Konsentrasi Penyemprotan Natrium Klorida Pada Tandan Buah Segar Kelapa Sawit Terhadap Mutu Minyak Sawit Kasar Carles Pernando; Fajar Restuhadi; Yelmira Zalfiatri
Jurnal Online Mahasiswa (JOM) Bidang Pertanian Vol 5 (2018): Edisi 1 Januari s/d Juni 2018
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Pertanian

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The purpose of this research was to know the effect of sodium chloride (NaCl) on the quality of fresh palm fruit bunches and Crude Palm Oil (CPO) also to find the best concentration of sodium chloride. The method used in this research was a Randomized Block Design (RBD) experiment with six treatments and four replications. The treatments were NaCl concentrations P0 (0%), P1 (5%), P2 (10%), P3 (15%), P4 (20%), and P5 (25%). The collected data were statistically analyzed by using Analysis of Variance (ANOVA) continued by Duncan’s New Multiple Range Test (DNMRT) at 5% level. The parameters observed were loss of brondolan mass, yield, moisture, specific gravity, levels of free fatty acid (FFA), and impurity content. The results of this reseach showed that NaCl can influence the quality of fresh palm fruit bunches that yield the loss of brondolan mass, as well as to the quality of CPO, the levels of FFA, moisture, and specific gravity. The treatment chosen from the result of this research was P5 (concentration NaCl of 25%). Treatment of P5 has levels FFA of 2.05%, moisture 0.216%, impurity content of 0.062%, specific gravity of 0.919, yield of 23.43% and loss of brondolan mass of 2.81%. Keywords: Natrium chloride, fresh fruit bunches, and crude palm oil.

Co-Authors Adeline Palma Sari Agus Sutikno Ahmad Ibrahim Ahmad Ibrahim Roni Surya Hasibuan AINIL HIFDA DAULAY Akhyar Ali Andesmar Andesmar Angelia Angelia Angga Pramana Angga Pramana Angga Pramana, Angga Antoni, Fiki Fadel Arum Rovarti Ningsih Candra Efendi Hasibuan Carles Pernando Chandra Gunawan Chandra, Rani DAULAY, AINIL HIFDA Dewi Fortuna Ayu Dewi, Yossi Kharisma Dewi, Yossie Kharisma Dini Aji Pringgondani Eko Herianto EKO WAHYUDI Erizal Thoyeb eykel sura bema FADLA B. SYARIF Faizah Hamzah Faizah Hamzah Fajar Restuhadi Fajar Yuliandri Fakhruni Alisya Farida Hanum Hamzah Fung, Liem Khe GUSLIKO NURMAN Hakim Santo Hamzah, Farida Hanum Handoko, Tito Harsanto Mursyid Hasnah AR, Nur Hasnah, Nur Heni Adhianata, Heni Idwal Idwal Suripto Ilhamsyah Azri Imelda Yunita Ishak Alhafis Jum'atri Yusri Jum’atri Yusri Khairunnisa Amanda Kurnia, Ridho Lasron Pahala Tua Nainggolan Listya Eka Wati Luky Prasetyo M Fazil Marita TM Simbolon MELIYANA MELIYANA Mhd Andry Kurniawan Muhaiminati Adlina Muhammad Luthfi Muhammad Nur Cahyanto Netti Herawati Nita Rimayanti Nopiani, Yanti Noviar Harun Nul Hakim, Lukman NURMAN, GUSLIKO Pasaribu, Jekson Putra, Diswanto Putri Nada Sirait Rahmadini Payla Juarsa Rahmayuni Rahmayuni Rahmayuni Rahmayuni, Rahmayuni Rahot Manto Sinaga Raiyan Renadi Ramayuni Ramayuni Randa, Agustian RARA ANIRA Raswen Efendi Renadi, Raiyan Rika Afrianto Riza Fahlevi Rizky Zulhardi Rossi, Evy Rozikhin RUSLI RUSTAM Saitun, Saitun Shanti Fitriani Silaban, Mastrina Siti Nurhajijah SITI SANTUN MULIA Sunardi Setiaries Sunardi Supranto Supranto Suryo Purwono Taufiq Maulana Taufiq Maulana USMAN PATO Victor David Vonny Setiaries Johan Weni Mulyani Asfi Wulan Kumala Dewi Yasa Rudin Yelly Zamaya Yulia Citra Yuliandri, Fajar Yunisa, Fina Yusmarini Yusmarini Zulhardi, Rizky

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