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All Journal Jurnal Ilmu Dasar Jurnal Kelautan Tropis Indonesian Journal of Chemistry Indonesian Food Science and TechnologyJournal Journal of Saintech Transfer Acta Chimica Asiana Abdimas Galuh : Jurnal Pengabdian Kepada Masyarakat Journal Of Chemical Process Engineering
Winda Rahmalia
Department of Chemistry, Faculty of Mathematics and Natural Sciences, Tanjungpura University, Jl. Ahmad Yani Pontianak, Kalimantan Barat 79124
Aerospace Engineering Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Control & Systems Engineering Economics, Econometrics & Finance Energy Engineering Law, Crime, Criminology & Criminal Justice Mathematics Nursing Other

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Technical Assistance for the Process of Making Liang Tea as a Healthy Drink in The PKK (Family Welfare Development) Organization of West Kalimantan Province Administrator Dewi, Yohana Sutiknyawati Kusuma; Fadly, Dzul; Syamsi, Wisi Wilanda; Rahmalia, Winda; Sutignya, Thomas Candra Wasis Agung
Journal of Saintech Transfer Vol. 6 No. 1 (2023): Journal of Saintech Transfer
Publisher : Talenta Publisher Universitas Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jst.v6i1.11483

Abstract

Community service regarding the Technology of Liang Tea Making as a Health Drink was carried out by a Team of Lecturers from the Food Science and Technology Study Program, Faculty of Agriculture, Tanjungpura University (UNTAN) at the PKK Office. The partner of this activity is the West Kalimantan Province PKK. The problems faced by the skills and knowledge of Provincial PKK members as facilitators for members of the PKK organization at the Regency, Sub-District level which they assist in making health drinks as well as traditional Pontianak drinks that are competitive are still limited. The implementation method used is socialization in the form of counseling, training, mentoring, evaluation and monitoring. The results of the activity achieved were 80% of participants during the socialization increased their knowledge based on the results of question and answer through questionnaires, 10 training participants were able to make tea burrows correctly, 5 trainees would use tea burrows for their family's functional drinks. The continuation of this activity is expected to produce new facilitators for members of the PKK organization and initiate PKK members for product commercialization.
Innovation of Goat's Milk Soft Candy with Annatto Extract (bixa orellana l.) As Natural Colorant and Antioxidant Dewi, Yohana Sutiknyawati Kusuma; Putri, Dea Malyana; Fadly, Dzul; Rahmalia, Winda
Indonesian Food Science and Technology Journal Vol. 7 No. 1: Volume 7. Number 1, December 2023 |IFSTJ|
Publisher : Department of Technology of Agricultural product (THP) Jambi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/ifstj.v7i1.29836

Abstract

The research aims to produce innovative soft candy from goat's milk and annatto extract as colorants and antioxidants that consumers like. Soft candy product innovations were studied in random group designs consisting of five concentrations of annatto extract (0%, 0.15%, 0.20%, 0.25%, and 0.30%). The results showed that the addition of annatto extract in the goat's milk soft candy formula decreases the L value, along with an increase of a* and b values so that the color of the soft candy becomes orange. Increasing the concentration of annatto extract causes a significant increase in antioxidant activity. The addition of annatto extract in the goat's milk candy formulation influenced the level of preference for the color attribute but did not affect the aroma, taste, and texture attributes. The goat's milk soft candy with the addition of 30% annatto extract as a natural colorant and antioxidant produced the best physicochemical and sensory characteristics based on index effectivity value. This soft candy resulted in a water content of 7.46±0.74%, ash content of 0.57±0.07%, and antioxidant activity of 69.20±1.07%. The addition of annatto extract also does not affect the ash content or water content of the goat's milk soft candy produced.
Synthesis of Nanosilica from Padas Stone to Reduce The Total Organic Carbon of Palm Oil Waste Shofiyani, Anis; Chitra, Fara; Rahmalia, Winda; Rudiyansyah, R.; Alimuddin, Andi Hairil
Jurnal ILMU DASAR Vol 20 No 1 (2019)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (383.996 KB) | DOI: 10.19184/jid.v20i1.8679

Abstract

Padas stone is one of the natural mineral containing 67.5% of SiO2 compounds. In this research, synthesis of nanosilica was carried out by sol-gel method asistanced by 2.45 GHz microwave radiations with low (10%), medium (50%) and high (100%) power at 30 and 60 minutes of contact times. It was analyzed by XRD, BET, FTIR spectrophotometry and SEM. The synthesized silica was then used as absorbent for total organic carbon (TOC) of palm oil waste. The results show that the synthesized silica was a mixture of cristobalite and quartz type minerals according to ICDD No. 00-003-0271 and 01-083-287. The surface area and silicon dioxide contains are 12.174 m2/g and 76.325% for silica without microwave assistance (SiO2-TPMW); 12.796 m2/gand 86.385% for silica with 30 minutes on 10% microwave assistance(SiO2 -MW 10A); 12.735 m2/gand 86.254% for silica with 60 minutes on 10% microwave assistance (MW 10B); 13,659 m2/gand 87.211% for MW 50A; 13,583 m2/g and 86.684% for MW 50B;7.883 m2/gand 57.527% for MW 100A; also 8.752 m2/g and 37.725% for MW 100B, respectively. The use of silica as an absorbent of TOC shows the effectiveness of 62.89% (TPMW); 63.68% (MW 10A); 62.96% (MW 10B); 65.25% (MW 50A); 64.61% (MW 50B); 62.37% (MW 100A) and 61.18% (MW 100B) from the initial TOC of 1520 mg/L. Keywords: synthesis, nanosilica, padas stone, total organic carbon, oil waste.
Pelatihan Pembuatan Virgin Coconut Oil (VCO) Bagi Anggota Koperasi Konsumen Padaidi Sipatuo Khatulistiwa Sayekti, Endah; Gusrizal, Gusrizal; Alimunddin, Andi Hairil; Sapar, Ajuk; Rudiyansyah, Rudiyansyah; Zahara, Titin Anita; Shofiyani, Anis; Rahmalia, Winda; Widiyananta, Surya; Lestari, Titiek; Rahayu, Warsi Kurnia
Abdimas Galuh Vol 6, No 2 (2024): September 2024
Publisher : Universitas Galuh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25157/ag.v6i2.14423

Abstract

Koperasi Konsumen Padaidi Sipatuo Khatulistiwa yang telah beranggotakan 30 orang memiliki potensi tenaga kerja dan potensi pasar dalam merintis unit usaha dan pemasarannya. Salah satu upaya yang dapat dilakukan adalah menjajaki jenis usaha yang mudah, biaya murah dan dapat digunakan oleh berbagai lapisan masyarakat, salah satunya adalah pengolahan sumber daya alam menjadi produk yang bernilai ekonomi. Salah satu potensi yang dapat dikembangkan adalah pemanfaatan kelapa dalam proses pembuatan Virgin Coconut Oil (VCO). VCO merupakan salah satu produk yang memiliki beragam manfaat, selain digunakan untuk menggoreng makanan, ternyata untuk keperluan kesehatan VCO dapat mencegah penyakit jantung, kanker, diabetes, memperbaiki pencernaan, meningkatkan sistem kekebalan tubuh, mencegah infeksi virus HIV, dan SARS. Potensi ini tentunya dapat dikembangkan oleh anggota koperasi, selain untuk memenuhi kebutuhan sendiri ataupun dapat dipasarkan sebagai salah satu jenis usaha produksi dan penjualan bagi Koperasi Konsumen Padaidi Sipatuo Khatulistiwa. Pelaksanaan PKM berlangsung di lokasi salah satu peserta yang merupakan anggota Koperasi Konsumsi Padaidi Sipatuo Khatulistiwa. Peserta yang hadir dalam kegiatan tersebut sebanyak 12 orang yang merupakan perwakilan dari anggota koperasi tersebut. Kegiatan PKM diawali dengan sambutan dari Perwakilan TIM PKM dan Ketua Koperasi, dilanjutkan pemaparan tentang Pembuatan VCO dari Kelapa Dalam. Pada materi ini juga dijelaskan bagaimana manfaat VCO bagi kesehatan dan kendala apa saja yang dihadapi dalam pembuatan VCO. Hasil kegiatan akan dipublikasikan pada jurnal pengabdian atau dalam bentuk hak cipta film dokumenter.
Reducing Free Fatty Acids in Crude Palm Oil Using Diethylene Glycol and Zinc(II) Chloride Based Deep Eutectic Solvent Suriyanti, Lieli; Usman, Thamrin; Rahmalia, Winda
Indonesian Journal of Chemistry Vol 24, No 3 (2024)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.85980

Abstract

Deep eutectic solvents (DES) were prepared by precise combinations of mol fractions of chemical compounds, resulting in a lowered melting point due to hydrogen bonding. This research aimed to elucidate the physicochemical attributes of DES and its effectiveness in mitigating free fatty acid (FFA) levels in crude palm oil (CPO). Zinc(II) chloride (ZnCl2) served as the hydrogen bond acceptor (HBA) while diethylene glycol (DEG) as the hydrogen bond donor (HBD). Characterization included freezing point, density, viscosity, conductivity, and pH determination. At a ZnCl2 mol fraction of 0.30, the resulting DES exhibited homogeneity with transparent liquid properties, featuring a freezing point below −10 °C, density of 1.42 g/mL, viscosity of 1933.40 cP, conductivity of 66.13 µS/cm, and pH 3.42. FTIR spectra confirmed hydrogen bond interactions between HBA and HBD. Applied to CPO at a 1:1 volumetric ratio (DES:CPO), with 2 h of stirring time at 50 °C, FFA content decreased from 4.11 to 0.86%. This research highlights DES as an environmentally sustainable purification agent, significantly reducing FFA levels in unrefined palm oil.
Improvement of Bixin Carotenoid Stability through the Formation of M–bixin (M = Mg2+, Ca2+, Zn2+, and Se4+) Complex Compounds Based on Photodegradation Kinetic Studies Rahmalia, Winda; Shofiyani, Anis; Kusuma Dewi, Yohana Sutiknyawati; Indriani, Fani; Putri, Alintianni Yolla; Septiani, Septiani
Indonesian Journal of Chemistry Vol 24, No 4 (2024)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.92098

Abstract

Bixin is used in wide-ranging food applications but is susceptible to degradation by many factors, including light. This research aims to increase bixin photostability through metal complexation. Bixin was complexed with Mg2+, Ca2+, Zn2+, and Se4+. The synthesis process was carried out in deep eutectic solvent media. Metal-bixin complexes have been successfully synthesized, indicated by the change in retention factor and %III/II ratio values resulting from thin-layer chromatography and UV-vis spectrophotometer analysis, respectively. The Fourier transform infrared analysis showed the interaction between central metal ion with bixin ligand has occurred by hydroxyl and carbonyl groups of bixin, which was characterized by a decrease in the intensity of the absorption peak in wavenumber 3000–4000 cm−1 (for the –OH carboxylic group vibration) and the peak shift of metal-bixin complexes towards the larger compared to bixin in the range wavenumber 1600–1700 cm−1 (for C=O ester vibrations). First-order photodegradation kinetics studies showed that the metal-bixin complexes were more stable than pure bixin. Se-bixin was four times more stable than pure bixin. Complexation of bixin with metals was shown to be a potential method to increase the stability of bixin, especially against light exposure.
Studi Komparasi Penggunaan TiO2 Anatase dan P25 sebagai Anoda untuk Sel Surya Tersensitasi Bixin Septiani, Septiani; Naselia, Uray Amira; H. Silalahi, Imelda; Usman, Thamrin; Rahmalia, Winda
Journal of Chemical Process Engineering Vol. 6 No. 1 (2021): Journal of Chemical Process Engineering
Publisher : Fakultas Teknologi Industri - Universitas Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33536/jcpe.v6i1.821

Abstract

Penelitian ini dilakukan untuk menentukan kinerja sel surya yang menggunakan TiO2- anatase dan TiO2-P25 sebagai anoda. Bixin digunakan sebagai sensitizer. Bixin diekstraksi dan diisolasi dari biji kesumba. Bixin dianalisis menggunakan spektrofotometer UV-Vis dan FTIR. Hasil analisis menggunakan spektrofotometer UV-Vis menunjukkan adanya 3 puncak karakteristik bixin pada 488, 459, 430 nm. Spektra FTIR bixin ditandai dengan adanya serapan pada bilangan gelombang 3183 cm-1 mengindikasikan vibrasi renggang -OH yang berasal dari gugus karboksilat; pada 2955, 2924, dan 2852 cm-1 vibrasi renggang H-C-H; pada 1716 cm-1 vibrasi renggang C=O; pada 1608 cm-1 vibrasi tekuk O-H; pada 1563 dan 1518 cm-1 vibrasi renggang C=C (alkena); pada 1379 cm-1 vibrasi tekuk C-H; pada 1255 cm-1 vibrasi renggang C-O; pada 1161 cm-1 vibrasi simetri dan asimetri C-O-C (kelompok ester); serta pada 1012 cm-1 vibrasi renggang C-H. Kinerja sel surya yang menggunakan TiO2-antase menunjukkan efisiensi konversi energi maksimum yang lebih tinggi (0,027%) jika dibandingkan dengan TiO2-P25 (0,006%) di bawah intensitas cahaya 100 W/m2.
Fotocatalytic degradation of methylene blue by floating TiO2-coconut fiber Sugandi, Didiek; Wahyuni, Nelly; Rahmalia, Winda
Acta Chimica Asiana Vol. 7 No. 1 (2024)
Publisher : The Indonesian Chemical Society, Chapter Nusa Tenggara and The University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/aca.v7i1.183

Abstract

Indonesia's expanding industrial sector has resulted in an increase in the use of dyes. Methylene blue (MB), a dye used in the batik and textile industries, has the potential to be detrimental to people and the environment. Recent research indicates that the TiO2 photocatalyst has the ability to reduce MB. TiO2 transported in coconut fiber can improve illumination in the photocatalysis process. The purpose of this study is to examine the properties and activity of a TiO2-coconut fiber photocatalyst. SEM-EDX was used to characterize the morphology and composition of floating catalysts, and Fourier transform infrared (FT-IR) was used to characterize the functional groups. At 120 minutes, TiO2-coconut fiber photocatalysis with a mass ratio of 20:80 w/w demonstrated the maximum degradation of 62.72%. The SEM-EDX data demonstrate the morphology of TiO2 distribution on the surface of coconut fiber, which is distinguished by the presence of the main elements O, Ti, and C. The FT-IR study results demonstrate a shift and decrease in Ti-O absorption intensity from 756,09 cm1 to 721,38 cm1, indicating the presence of Ti-O-C bonds. It is hoped that this research will be useful in the treatment of MB in textile industry waste or other organic waste.
Thermostability and Photostability of Shrimp Waste Oil Based on Sun Protection Factor Value, Erythema Transmission, Pigmentation Transmission and Free Fatty Acid Content Agustiawan, Deri; Rahmalia, Winda; Alimuddin, Andi Hairil; Prayitno, Dwi Imam; Sayekti, Endah
Jurnal Kelautan Tropis Vol 27, No 2 (2024): JURNAL KELAUTAN TROPIS
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jkt.v27i2.22775

Abstract

The high production of shrimp is accompanied by an increase in by-products (cephalothorax, carapace, and tail), which are discarded as waste. Therefore, a solution is needed to convert shrimp waste into economic value products like shrimp waste oil (SWO). SWO contains fatty acids and astaxanthin, which have antioxidant activity to scavenge free radicals, so it can prevent skin damage such as wrinkles and dryness. Due to its fatty acids and astaxanthin content, SWO can be applied as a sunscreen. However, heating and irradiation can degrade bioactive compounds that are beneficial for health. Thermostability and photostability tests are needed to determine the best storage conditions for SWO based on sun protector factor (SPF) values, erythema transmission (%Te), pigmentation transmission (%Tp), and free fatty acid (FFA) content. The yield of SWO obtained was 2.569% from 100 grams of dry shrimp waste weight. Analysis by using FTIR showed the presence of astaxanthin content in SWO, while GC-MS showed that the SWO contains up to 32.66% of hexanoic acid. SWO thermostability and photostability tests showed a decrease in SPF values and an increase in %Te and %Tp as heating and irradiation time increased. This is due to the photobleaching effect. There was no significant change in the FFA value, indicating that SWO is quite resistant to heating and irradiation.
Aktivitas Antioksidan Ekstrak Astaxanthin dari Limbah Kulit dan Kepala Udang Dogol (Metapenaeus ensis) Rahmalia, Winda; Adhitiyawarman, Adhitiyawarman; Prayitno, Dwi Imam; Lubis, Yosef Novem Batistuta
Jurnal Kelautan Tropis Vol 27, No 2 (2024): JURNAL KELAUTAN TROPIS
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jkt.v27i2.22706

Abstract

Astaxanthin is a carotenoid derivative compound with various benefits, one of which is as an antioxidant, making astaxanthin applicable in drugs and cosmetics. Astaxanthin is discoverable in various sources, with shrimp as its main source. This study aims to determine the antioxidant activity of astaxanthin extracted from shrimp shell and head wastes. Extraction was carried out using the soxhletation method, followed by saponification to obtain free astaxanthin. Astaxanthin in extract before and after saponification were identified using thin-layer chromatography (TLC) and UV-Vis spectrophotometry. Antioxidant activity assay was carried out in five variations of sample concentrations using the 2,2-diphenyl-1-picrylhydrazyl (DPPH) method. Extraction of shrimp shell and head wastes resulted in an oil yield percentage of 1.02 and 3.05 % of dry mass in 60 g of shrimp shells, respectively. Identification results showed astaxanthin content in extracts after saponification were higher than that before saponification. There are three thin layer chromatography (TLC) separation spots and two UV-Vis absorption peaks in extracts before and after saponification. Antioxidant activity assay results (IC50) of shrimp shell extract before and after saponification showed antioxidant activity of 572.0 and 186.6 mg/L, respectively. Astaxanthin merupakan senyawa turunan karotenoid dengan beragam manfaat, salah satunya sebagai antioksidan, sehingga membuat astaxanthin dapat diaplikasikan dalam obat-obatan dan kosmetik. Astaxanthin dapat ditemukan dalam berbagai sumber, dengan sumber utama adalah udang. Penelitian ini bertujuan untuk menentukan aktivitas antioksidan astaxanthin yang diekstraksi dari limbah kulit dan kepala udang. Ekstraksi dilakukan dengan metode soxhletasi, dilanjutkan dengan saponifikasi untuk mendapatkan astaxanthin bebas. Hasil ekstraksi dan saponifikasi diidentifikasi astaxanthinnya menggunakan kromatografi lapis tipis (KLT) dan spektrofotometri UV-Vis. Uji aktivitas antioksidan dilakukan pada lima variasi konsentrasi sampel menggunakan metode 2,2-difenil-1-pikrilhidrazil (DPPH). Ekstraksi limbah kulit dan kepala udang menghasilkan rendemen masing-masing sebesar 3,05 dan 1,02% massa kering dari 60 g kulit udang. Hasil identifikasi menunjukkan kadar astaxanthin dari ekstrak setelah saponifikasi lebih tinggi daripada sebelum saponifikasi. Terdapat tiga spot pemisahan kromatografi lapis tipis (KLT) serta dua puncak serapan UV-Vis pada ekstrak sebelum dan setelah saponifikasi. Hasil uji aktivitas antioksidan (IC50) kulit udang sebelum dan setelah saponifikasi masing-masing adalah 572,000 dan 186,583 mg/L.
Co-Authors Adhitiyawarman, Adhitiyawarman Agustiawan, Deri Ajuk Sapar Alimunddin, Andi Hairil Andi Hairil Alimuddin Anis Shofiyani Chitra, Fara Endah Sayekti Fadly, Dzul Fani Indriani, Fani Gusrizal Gusrizal Heni Pujiastuti Imelda Hotmarisi Silalahi Lestari, Titiek Lubis, Yosef Novem Batistuta Naselia, Uray Amira Nelly Wahyuni Prayitno, Dwi Imam Putri, Alintianni Yolla Putri, Dea Malyana Rahayu, Warsi Kurnia Rudiyansyah Rudiyansyah Rudiyansyah, R. Sugandi, Didiek Suriyanti, Lieli Syamsi, Wisi Wilanda Th. Candra Wasis Agung Sutignya Thamrin Usman Titin Anita Zahara, Titin Anita Widiyananta, Surya Yohana Sutiknyawati Kusuma Dewi