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INDONESIA
Jurnal Penelitian Saintek
Published by Universitas Negeri Yogyakarta
ISSN : 14123991     EISSN : 25287036     DOI : 10.21831
Core Subject : Science,
Decision Sciences, Operations Research & Management
Arjuna Subject : -
Articles 6 Documents
 1 
Search results for , issue "Vol 29, No 1 (2024)" : 6 Documents clear
Analysis of microbiological hazards in turmeric tamarind traditional drink products Lifiana, Aulia; Amarantini, Charis; Budiarso, Tri Yahya
Jurnal Penelitian Saintek Vol 29, No 1 (2024)
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jps.v1i1.70596

Abstract

This study aimed to determine the presence of bacterial contaminants, specifically Escherichia coli, Salmonella sp., and Staphylococcus aureus, in turmeric tamarind traditional drink products according to the Indonesian National Standard (SNI 2019). The research was conducted using samples from 11 different locations in Yogyakarta. The samples were analyzed using Chromocult Coliform Agar (CCA), Salmonella Shigella Agar (SSA), and Baird Parker Agar (BPA) to isolate the specific bacteria. Further biochemical tests, including IMViC, Urease, and sugar fermentation tests, as well as confirmation using API 20E and API STAPH tests, were performed on the suspected isolates. The findings reveal that Escherichia coli, Salmonella sp., and Staphylococcus aureus were not detected in any of the samples. Thus, the traditional turmeric tamarind drink is considered safe for consumption according to the tested parameters. Keywords: turmeric tamarind, microbiological hazard, Klebsiella pneumoniae, Staphylococcus aureus. E. coli
Kajian konsep arsitektur kubisme pada bangunan perkantoran, pendidikan, dan peribadatan Islam Anisa, Anisa; Fahrezzy, Farhan; Faizulhafidz, Maulana Sadam; Fakhri, Reza M
Jurnal Penelitian Saintek Vol 29, No 1 (2024)
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jps.v1i1.72436

Abstract

Tujuan penelitian ini adalah untuk mengidentifi kasi, mendeskripsikan, dan menafsirkan penerapan konsep arsitektur kubisme pada bangunan perkantoran, pendidikan, dan peribadatan Islam. Metode yang digunakan pada penelitian ini adalah deskriptif kualitatif, dengan data kombinasi primer dan sekunder sebanyak 9 bangunan sebagai kasus penelitian. Pengumpulan data menggunakan observasi lapangan, wawancara, dan literatur. Sedangkan analisis kualitatif menggunakan model miles-huberman. Hasil dari penelitian ini adalah telaah penerapan arsitektur kubisme pada 9 kasus bangunan dengan tipologi perkantoran, pendidikan, dan peribadatan yang ditunjukkan dengan tiga hal yaitu bentuk massa bangunan, fasad bangunan, dan hubungan ruang-bukaan untuk pencahayaan alami. Bentuk massa bangunan berupa kubus walaupun pada perkembangannya tidak harus semua sisinya persis sama, karena ditunjang dengan fasad yang memiliki kesamaan antar sisi. Kesamaan dapat berupa pola, bentuk, warna, maupun elemen dan material. Sedangkan hubungan ruang di dalam bentuk massa tersebut meminimalisir pembatas sehingga dengan desain bukaan yang tepat dapat meneruskan cahaya masuk ke dalam bangunan.Kata kunci: arsitektur kubisme, perkantoran, pendidikan, peribadatanStudy of cubist architecture concepts in offi ce buildings, educational institutions, and Islamic places of worship Abstract: The aim of this study was to identify, describe, and interpret the application of Cubist architectural concepts in office buildings, educational institutions, and Islamic places of worship. The research employed a qualitative descriptive method, utilizing a combination of primary and secondary data from nine buildings as case studies. Data were collected through fi eld observations, interviews, and literature review, and analyzed qualitatively using the MilesHuberman model. The fi ndings reveal the application of Cubist architecture in the nine case study buildings, categorized into office, educational, and religious typologies, through three main aspects: building mass form, facade design, and spatial relationships for natural lighting. The building mass typically takes the form of cubes, although not all faces need to be identical due to the supporting facades that exhibit similarities between sides. These similarities may involve patterns, shapes, colors, or materials. Additionally, the spatial arrangement within the mass minimizes barriers, allowing for eff ective light transmission into the building through well-designed openings. Keywords: Cubist architecture, office buildings, educational institutions, places of worship
Optimasi konsentrasi katalis Natrium Hidroksida pada sintesis 2,5-bis((E)-3,4-dimetoksibenziliden)siklopentan-1-on Tjakraningtyas, Wahyu; Budimarwanti, Cornelia
Jurnal Penelitian Saintek Vol 29, No 1 (2024)
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jps.v1i1.71399

Abstract

Penelitian ini dilakukan dengan tujuan untuk sintesis senyawa 2,5-bis((E)-3,4 dimetoksibenziliden)siklopentan-1-on dengan variasi mol katalis NaOH serta mengetahui rendemen senyawa (2E,5E)-2,5-bis(3,4-dimetoksibenziliden) siklopentanon yang telah disintesis. Sintesis dilakukan dengan mereaksikan siklopentanon sebanyak 5 mmol dan veratraldehida sebanyak 10 mmol menggunakan katalis NaOH dengan variasi 5, 10, 15, dan 20 mmol dan pelarut etanol. Proses sintesis berjalan melalui reaksi kondensasi Claisen-Schmidt menggunakan metode microwave assisted organic synthesis selama 60 detik. Hasil sintesis yang diperoleh kemudian dilakukan karakterisasi melalui KLT dan KLT scanner, FTIR, dan 1H-NMR. Hasil penelitian diperoleh senyawa berbentuk serbuk kuning dan hasil karakterisasi menunjukkan bahwa senyawa tersebut merupakan senyawa target (2 E,5E)-2,5-bis(3,4-dimetksibenziliden) siklopentanon. Rendemen senyawa (2E,5E)-2,5-bis(3,4-dimetoksibenziliden) siklopentanon yang dihasilkan oleh variasi mol katalis NaOH 5, 10, 15, dan 20 mmol secara berturut-turut yaitu 71,75%; 60,44%; 118,42%; dan 113,54%. Hasil penelitian ini menunjukkan bahwa katalis NaOH berpengaruh terhadap rendemen hasil sintesis.Kata Kunci: 2,5-bis((E)-3,4-dimetoksibenziliden)siklopentan-1-on, kondensasi Claisen- schmidt, metode MAOSOptimization of Sodium Hydroxide catalyst concentration in the synthesis of 2,5-bis((E)-3,4-dimethoxybenzylidene)cyclopentan-1-one Abstract: This study aimed to synthesize the compound 2,5-bis((E)-3,4-dimethoxybenzylidene) cyclopentan-1-one with varying molar quantities of NaOH catalyst and to determine the yield of the synthesized (2E,5E)-2,5-bis(3,4-dimethoxybenzylidene) cyclopentanone. The synthesis was carried out by reacting 5 mmol of cyclopentanone and 10 mmol of veratraldehyde using NaOH catalyst in amounts of 5, 10, 15, and 20 mmol, with ethanol as the solvent. The synthesis process involved Claisen-Schmidt condensation via microwave-assisted organic synthesis for 60 seconds. The synthesized products were characterized using TLC and TLC scanner, FTIR, and ^1H-NMR. The results revealed that the synthesized compound was a yellow powder, and the characterization confi rmed it as the target compound, (2E,5E)-2,5-bis(3,4-dimethoxybenzylidene) cyclopentanone. The yields of (2E,5E)-2,5-bis(3,4-dimethoxybenzylidene) cyclopentanone obtained with NaOH catalyst amounts of 5, 10, 15, and 20 mmol were 71.75%, 60.44%, 118.42%, and 113.54%, respectively. These fi ndings indicate that the amount of NaOH catalyst signifi cantly aff ects the yield of the synthesis. Keywords: (2E,5E)-2,5-bis(3,4-dimethoxybenzylidene)cyclopentanone, Claisen-schmidt condensation, MAOS method
Study of visual comfort in the library building based on the value of light intensity inside the room Rasa, Barem Talang; Sativa, Sativa
Jurnal Penelitian Saintek Vol 29, No 1 (2024)
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jps.v1i1.72245

Abstract

This study aimed to assess the adequacy of light intensity levels in the Sragen District Library building against the standards set by SNI 03–6197–2011. The observation process began with a review of relevant lighting theories, followed by an assessment of the library spaces, field testing involving the measurement of room dimensions, and light intensity readings. The library was divided into three zones: storage, reading, and circulation. Measurement points within these zones were determined based on SNI 16–7062–2004, and light intensity was measured using a luxmeter. The results indicate that the area of openings in the building is 27.3%, which is outside the ideal range specified by SNI (10%-20%). The average light intensity in the circulation zone at 08:30 WIB is 958 Lux, while at 10:30 and 12:30 WIB, it is 118 Lux and 67 Lux, respectively. In the reading zone, the average light intensity at 08:30, 10:30, and 12:30 WIB is 218 Lux, 207 Lux, and 202 Lux, respectively. For the storage zone, the average light intensity at 08:30, 10:30, and 12:30 WIB is 119 Lux, 78 Lux, and 77 Lux, respectively. Observations reveal that none of the measured values meet the SNI standard of 300 Lux.
Pengaruh campuran limbah pada pupuk organik cair terhadap dinamika populasi serangga hama kacang tanah Cahyaningrum, Ratna Dwi; Suhartini, Suhartini
Jurnal Penelitian Saintek Vol 29, No 1 (2024)
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jps.v1i1.63897

Abstract

Penelitian ini bertujuan untuk mengetahui jenis serangga hama yang ditemukan pada tanaman kacang tanah dan pengaruh campuran limbah sayur, buah, kotoran ternak pada pupuk organik cair terhadap dinamika populasi serangga hama tanaman kacang tanah (Arachis hypogaea L.). Penelitian ini menggunakan Rancangan Acak Lengkap dengan 6 perlakuan. Serangga hama diidentifi kasi hingga pada tingkat famili. Data yang diperoleh dianalisis menggunakan analisis deskriptif yang meliputi indeks keanekaragaman, indeks kemerataan, indeks dominansi, indeks kekayaan. Hasil penelitian menunjukkan bahwa didapatkan 10 famili serangga hama tanaman kacang tanah. Nilai indeks keanekaragaman Shanoon-wiener tertinggi pada perlakuan P5 yaitu (0,911) sedangkan secara keseluruhan termasuk kategori rendah. Pupuk organik cair dari variasi campuran limbah buah, sayur, dan kotoran ternak sebagai perlakukan ini tidak memberikan pengaruh yang efektif terhadap dinamika populasi serangga hama pada tanaman kacang tanah.Kata kunci: dinamika populasi, kacang tanah, serangga hamaEffect of waste mixture in liquid organic fertilizer on population dynamics of peanut insect pests Abstract: This study aimed to identify the types of insect pests found on peanut plants and to assess the impact of a mixture of vegetable and fruit waste, along with manure, in liquid organic fertilizer on the dynamics of insect pest populations in peanut plants (Arachis hypogaea L.). A Completely Randomized Design with 6 treatments was employed for this research. Insect pests were identifi ed to the family level. The data were analyzed using descriptive statistics, including diversity index, evenness index, dominance index, and richness index. The results reveal that 10 families of insect pests were identifi ed on peanut plants. The highest Shannon Wiener diversity index value was observed in treatment P5, with a value of 0.911, while the overall index fell into the low category. The liquid organic fertilizer made from various mixtures of fruit and vegetable waste, and manure did not show an eff ective impact on the dynamics of insect pest populations on peanut plants. Keywords: population dynamics, peanut, insect pests
Pengaruh konsentrasi asam sulfat pada sintesis nanokristal selulosa bonggol jagung Maulidanti, Nadiyya Nur; Nurdin, Abdul Malik; Luthfiyah, Ai Fifih; Senania, Astri
Jurnal Penelitian Saintek Vol 29, No 1 (2024)
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jps.v1i1.67993

Abstract

Penelitian ini bertujuan untuk mengidentifi kasi pengaruh asam sulfat pada sintesis nanokristal selulosa dari bonggol jagung. Isolasi selulosa dari bonggol jagung dilakukan dengan dua tahap yaitu delignfi kasi yang dengan menggunakan NaOH dan bleaching dengan NaOCl. Sintesis nanokristalin selulosa dilakukan dengan menggunakan metode hidrolisis asam sulfat dengan variasi konsentrasi pada suhu 45℃ selama 120 menit. Nanokristalin yang diperoleh dikarakterisasasi nilai kristalinitas dan ukuran kristal menggunakan analisis XRD dan identifi kasi gugus fungsi dengan menggunakan FTIR. Hasil penelitian menunjukan asam sulfat dapat mempengaruhi hasil sintesis dengan teridentifi kasi adanya gugus S=O pada permukaan karena adanya perekatan gugus dari H2 SO4 . Nilai kristalinitas selulosa terbesar diperoleh pada konsentrasi asam sulfat 60% menghasilkan nanokristal selulosa dengan nilai kristalinas sebesar 89,63%, sedangkan ukuran nanokristal terkecil (0,88 nm) dapat diperoleh pada konsentrasi 55%.Kata Kunci: bonggol jagung, hidrolisis asam, nanokristal selulosaEffect of sulfuric acid concentration on the synthesis of cellulose nanocrystals of corncob Abstract: This study aimed to identify the eff ect of sulfuric acid on the synthesis of cellulose nanocrystals from corn cob. Cellulose isolation from corn cob was carried out in two stages: delignifi cation using NaOH and bleaching with NaOCl. Cellulose nanocrystals were synthesized using sulfuric acid hydrolysis with varying concentrations at 45°C for 120 minutes. The obtained nanocrystals were characterized for crystallinity and crystal size using X-ray diff raction (XRD) analysis, and functional groups were identifi ed using Fourier-transform infrared spectroscopy (FTIR). The results indicate that sulfuric acid aff ects the synthesis outcome, as evidenced by the presence of S=O groups on the surface due to the bonding of H2SO4 groups. The highest cellulose crystallinity was achieved at a sulfuric acid concentration of 60%, resulting in cellulose nanocrystals with a crystallinity value of 89.63%. The smallest nanocrystal size (0.88 nm) was obtained at a concentration of 55%. Keywords: corn cob, acid hydrolysis, nanocrystaline cellulose

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