Article Per Year (5 Year)
p-Index From 2021 - 2026
1.235
P-Index
This Author published in this journals
All Journal Jurnal Periodic Jurusan Kimia UNP JURNAL PENDIDIKAN TAMBUSAI Jurnal Ilmiah Pendidikan Scholastic Pelita Eksakta MASALIQ: Jurnal Pendidikan dan Sains
Umar Kalmar Nizar
Unknown Affiliation
Religion Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Education Energy Materials Science & Nanotechnology Mathematics Physics Social Sciences Other

Published : 8 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 8 Documents
Search

 1 
Processing of Seafood Into Contemporary Food That Is Nutritious And Economically Valuable In Welcoming Ecotourism In Nagari Kurai Taji, Nan Sabaris District, Padang Pariaman Regency Fauzana - Gazali; Melindra Mulia; Trisna Kumala Sari; Umar Kalmar Nizar
Pelita Eksakta Vol 4 No 2 (2021): Pelita Eksakta Vol. 4 No. 2
Publisher : Fakultas MIPA Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/pelitaeksakta/vol4-iss2/143

Abstract

Nagari Kurai Taji is located in Nan Sabaris District, Padang Pariaman Regency, West Sumatra Province. This area is inhabited by 9335 people, most of whom work as fishermen, traders and farmers. Kurai Taji community who work as fishermen usually only sell their haul as raw materials or basic ingredients for cooking, so the profits are not much. The abundant marine haul is sometimes also difficult to sell to the public, especially in the midest of the current pandemic situation. In addition to fishing, the kurai taji peoples are also known as traders. They sell many things like daily necessities and Pariaman’s spesifics culinary. However, from the information obtained, there are not many people who sell contemporary foods that are liked by young people in this area, especially those processed from seafood. This community services aims to equiped the people in Kurai Taji Village with skills in processing seafood into modern food that is healthy, nutritious and has high economic value. After participating in the training, it is hoped that the community will have skills in processing seafood into modern food so that the products made can be sold and increase the income of the local community. Thus, the community will be better prepared to face the development of culinary tourism in Kurai Taji. The products made are expected to be an attraction for tourist visitors and improve the economy of the surrounding community.
Studi Perbanding Aktivitas Katalitik CaO Cangkang Telur Dengan Aktivasi Basa dan Asam Dalam Produksi Biodisel Randy Lesmana Putra; Budhi Oktavia; Sri Benti Etika; Suryelita Suryelita; Umar Kalmar Nizar; Rita Sundari
Jurnal Ilmiah Pendidikan Scholastic Vol 5 No 2 (2021): Jurnal Ilmiah Pendidikan Scholastic
Publisher : Fakultas Sastra Universitas Ekasakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36057/jips.v5i2.469

Abstract

Studi perbandingan aktivitas katalitik dari katalis CaO yang disintesis dari cangkang telur ayam dengan aktivator asam dan basa telah dipelajari. Aktivasi dengan basa dilakukan dengan metode impregnasi yaitu dengan memasukkan CaO kedalam larutan KOH. Aktivasi asam dilakukan dengan membuat komposit CaO dan karbon serta disulfonasi dengan asam sulfat pekat. Katalis CaO yang dihasilkan diaplikasikan dalam produksi biodisel dari minyak jelantah. Aktivitas katalitik ditentukan melalui uji produk biodisel yang dihasilkan. Hasil menunjukkan bahwa katalis yang dimodifikasi melalui impregnasi basa memiliki aktivitas katalitik yang tinggi dalam mengkonversi minyak jelantah menjadi biodisel. Meskipun katalis CaO tanpa modifikasi memiliki nilai densitas, laju alir dan bilangan asam lebih baik dari CaO-A dan CaO-A/CS, kedua katalis ini masih bisa dioptimasi dalam preparasi dan aplikasinya sebagai katalis dalam produksi biodisel.
Pengaruh Penambahan Prebiotik Inulin dari Chicory Terhadap Karakteristik Organoleptik Sinbiotik Set Yoghurt Vegi Kurnia Navida; Minda Azhar; Iryani Iryani; Umar Kalmar Nizar
Jurnal Periodic Jurusan Kimia UNP Vol 10, No 2 (2021): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (47.585 KB) | DOI: 10.24036/p.v10i2.111564

Abstract

Increasing the functional value of yogurt can be done by combining prebiotics with probiotics, known as yoghurt set synbiotics. This study aims to determine the effect of adding inulin chicory to the organoleptic synbiotic yoghurt set. This research is an experimental research. The yoghurt synbiotics made have variations in inulin concentrations (0.1%, 0.3%, 0.5%). Preparation of yoghurt synbiotic set was carried out at an incubation time of 20 hours, temperature 37°C. The analysis of the organoleptic test results showed that in the addition of 0.3% inulin, there was a significant difference in the aroma and texture of the yogurt synbiotic set, while the color was not significant between the comparison yogurt with the addition of 0.3% inulin.
Pembuatan dan Karakterisasi Karbon aktif dari Pelepah Kelapa Sawit dengan Aktivasi Ultrasonik sebagai Adsorben Rhodamin B Fajar Sa'bandi; Syamsi Aini; Umar Kalmar Nizar; Miftahul Khair
Jurnal Periodic Jurusan Kimia UNP Vol 10, No 2 (2021): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1364.813 KB) | DOI: 10.24036/p.v10i2.112417

Abstract

The manufacture of activated carbon from oil palm frond waste using an ultrasonic wave activator has been successfully carried out. The carbonization process was carried out at a temperature of 250ºC for 90 minutes. Activation with ultrasonic waves (35 Watt, 40 KHz) for 30 minutes was able to increase the iodine number from 330.06 mg/g to 799.14 mg/g and was in accordance with SNI No.06-3730-1995. FTIR spectra show that the activated carbon of oil palm fronds has a functional group –OH at wave number 2900-3200 cm-1, C=C at wavenumber 1500-1600 cm-1, C-O at wavenumber 1200-1250 cm-1. The results of the adsorption test on Rhodamine B dye showed that the activated carbon produced had an optimum absorption capacity of 9.04 mg/g at a concentration of 400 ppm for 90 minutes. Studies show that the adsorption isotherms absorption mechanisms tend to follow the Freundlich equation with a correlation coefficient (R2)= 0.9861.
Sintesis, Karakterisasi dan Aplikasi Karbon Aktif dari Kulit Pisang Muhammad Patly; Edi Nasra; Sri Benti Etika; Umar Kalmar Nizar
Jurnal Periodic Jurusan Kimia UNP Vol 9, No 1 (2020): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (345.077 KB) | DOI: 10.24036/p.v9i1.108821

Abstract

Active Carbon from biomassa has been ideal material as absorbent of pollutant chemistry. Banana peel is a biomassa contain about 60% carbohydtrate and its existence is abundant in nature, it causes banana peel is great for making active carbon. This review is combination from some researches about active carbon from banana peel. It aims to comprehend the carbon active synthesis from banana peel, characterization of active carbon and application active carbon as absorbent chemical pollution. The result from this review show characteristic of active carbon as functional groups,crystalline structure, surface morphology, pore size and pore volume, percentage of absoption and absorption capacity of active carbon to pollutant chemistry.
Efektivitas Penambahan Karbon Aktif Sabut Pinang (Areca cathecu L.) dalam Penjernihan Minyak Jelantah dengan Bleaching Earth Hemalia Fika, Miva `; Umar Kalmar Nizar
Jurnal Pendidikan Tambusai Vol. 9 No. 1 (2025)
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai, Riau, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jptam.v9i1.27574

Abstract

Minyak goreng merupakan kebutuhan pokok manusia sebagai media penggorengan yang dapat membantu meningkatkan nilai gizi makanan. Minyak goreng yang digunakan secara berulang-ulang berbahaya bagi kesehatan manusia karena terjadi kerusakan pada minyak akibat oksidasi, hidrolisis dan polimerisasi dan minyak jelantah juga memiliki dampak yang buruk bagi lingkungan. Adsorben yang digunakan dalam penjernihan minyak jelantah berupa karbon aktif dari pemanfaatan limbah berupa sabut pinang karena harganya yang ekonomis dan memiliki kandungan selulosa yang tinggi sehingga cocok digunakan sebagai karbon aktif. pada penelitian ini karbon aktif dikombinasikan dengan bleaching earth dalam penjernihan minyak jelantah. Bleaching earth dapat membantu menyerap zat-zat yang tidak diperlukan dari minyak jelantah sehingga dapat digunakan dalam penjernihan minyak jelantah. Beberapa pengujian dilakukan pada minyak jelantah dan minyak sulingan. karbon aktif dari sabut pinang dan bleaching earth dalam menjernihkan minyak jelantah menghasilkan densitas 0,94676 gr/mL, bilangan asam yang dihasilkan 4,99381 mgKOH/g, bilangan penyabunan 37,26972 mgKOH/g, kadar air 0,0049 %.
Pengaruh Doping Nikel dan Monoethanolamine (MEA) sebagai Zat Aditif terhadap Energi Celah Pita SnO2 Nadya Alexandra; Hary Sanjaya; Alizar Ulianas; Umar Kalmar Nizar
MASALIQ Vol 6 No 1 (2026): JANUARI
Publisher : Lembaga Yasin AlSys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/masaliq.v6i1.8913

Abstract

The relatively large band gap energy of SnO₂ semiconductors limits their ability to absorb visible light, resulting in suboptimal photocatalytic activity. Although modification of SnO₂ band gap energy through transition metal doping has been widely studied, research that specifically combines nickel doping with the addition of monoethanolamine (MEA) using the sol–gel method remains limited. This study aimed to analyze the effect of nickel doping and MEA addition on the band gap energy of SnO₂ synthesized via the sol–gel method. A quantitative approach with a laboratory experimental design was employed, in which pure SnO₂ and nickel-doped SnO₂ with MEA addition were synthesized as research samples and subsequently characterized using a UV–Diffuse Reflectance Spectrophotometer (UV–DRS). Reflectance data were analyzed using the Kubelka–Munk approach and Tauc plot method to determine band gap energy. The results showed that pure SnO₂ had a band gap energy of 3.59 eV, whereas nickel-doped SnO₂ with MEA addition exhibited a reduced band gap energy of 2.33 eV. These findings indicate that the combination of nickel doping and MEA additive is effective in modifying the optical properties of SnO₂ and extending its light absorption into the visible region, thereby enhancing its potential as a visible-light-driven photocatalytic material. This study contributes to the development of modification strategies for SnO₂-based oxide semiconductors and opens avenues for further research on optimizing dopant and additive compositions as well as directly evaluating the photocatalytic performance of the material.
Studi Eksploratif Pemanfaatan Rumput Liar Perkarangan sebagai Eco-enzyme dengan Aditif Kulit Lemon Andrian Khasvarof; Umar Kalmar Nizar; Della Rosalynna Stiadi
MASALIQ Vol 6 No 2 (2026): MARET
Publisher : Lembaga Yasin AlSys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/masaliq.v6i2.9061

Abstract

Eco-enzyme is a fermentation product derived from organic materials that can potentially be produced from various biomass sources, yet the use of wild grasses on vacant land as a primary raw material has not been widely investigated. This study aimed to determine the potential of wild grasses as the main substrate for eco-enzyme production by observing its physical, chemical, and phytochemical characteristics. Eco-enzyme was produced through the fermentation of wild grasses with the addition of lemon peel as an aromatic additive, and the resulting product was analyzed in terms of color, odor, pH, nutrient content of nitrogen (N), phosphorus (P), and potassium (K), as well as phytochemical compounds. The results showed that the resulting eco-enzyme had a cloudy brownish color, a fresh and slightly sweet aroma, and a pH value of 3 across all variations, indicating the formation of organic acids during fermentation. Nutrient analysis yielded positive results for N and P, while K was not detected, and phytochemical tests indicated the presence of flavonoids, phenolics, and tannins in all samples. Overall, these findings demonstrate that wild grasses have the potential to be utilized as an alternative raw material for eco-enzyme production, providing nutrient content and bioactive compounds formed through the fermentation of natural materials.
Co-Authors Alizar Ulianas Andrian Khasvarof Budhi Oktavia Della Rosalynna Stiadi Edi Nasra Fajar Sa'bandi Fauzana Gazali Hary Sanjaya Hemalia Fika, Miva ` Iryani Iryani Miftahul Khair Minda Azhar Muhammad Patly Mulia, Melindra Nadya Alexandra Randy Lesmana Putra Rita Sundari Sri Benti Etika Suryelita . Syamsi Aini Trisna Kumala Sari Vegi Kurnia Navida