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INDONESIA
BUANA SAINS
Published by Universitas Tribhuwana Tunggadewi
ISSN : 14121638     EISSN : 25275720     DOI : -
Core Subject : Science, Education,
Biochemistry, Genetics & Molecular Biology Chemistry Mathematics Physics
BUANA SAINS p-ISSN : 1412-1638 | e-ISSN: 2527-5720 is a double-blind peer-reviewed, open-access journal, published by UNITRI PRESS. It publishes original and applied research in all areas of natural science. The Editorial goal is to provide a forum exchange and an interface between researchers and practitioners in any natural science related field.
Arjuna Subject : -
Articles 9 Documents
 1 
Search results for , issue "Vol 23, No 1 (2023)" : 9 Documents clear
POTENTIAL ENTOMOPATHOGENIC BACTERIA ISOLATED FROM EXTREME CONDITION AREA SIDOARJO MUD, INDONESIA AGAINST Spodoptera litura FAB (LEPIDOPTERA: NOCTUIDAE) Tita Widjayanti; Luqman Qurata Aini; Restu Rizkyta Kusuma; Istiqomah Istiqomah
BUANA SAINS Vol 23, No 1 (2023)
Publisher : Universitas Tribhuwana Tunggadewi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33366/bs.v23i1.4554

Abstract

Biological control by using entomopathogenic bacteria shows potential to be developed as an alternative technique to control Spodoptera litura. Bacteria that can live in extreme environments are reported to have high efficiency and the ability to survive in various environmental conditions, such as in the area of Sidoarjo mud. Related to the issue, this research aimed to find out bacteria that can survive in extreme conditions and are potentially entomopathogenic to control S. litura. The study was conducted from January until July 2021 in the Sidoarjo mud area and laboratory of Biological Control, Faculty of Agriculture, University of Brawijaya. The research was conducted using methods including consist of a sampling of Sidoarjo hot mud, isolation, and screening of bacteria that is potential as entomopathogenic bacteria, bioassay of mortality S. litura, development of larvae and pupal using Completely Randomized Design with 11 treatments and 4 replications, and molecular identification by 16S rRNA. Data for mortality and development of larvae and pupal were submitted to variance analysis, followed in comparison to the averages of the Duncan test at a 5% level of significance. The results showed that 43 colony bacteria from Sidoarjo hot mud have been successfully isolated and obtained 9 isolates selected as entomopathogenic bacteria against S. litura with a percentage of mortality larvae reached 60%. Moreover, bacteria have the potential to inhibit the development of larvae and pupal S. litura. Molecular identification showed that potential isolates are Bacillus subtilis strain 15A-B92, Bacillus thuringiensis strain GTG-29, and Bacillus anthracis strain BA1035.
PENGEMBANGAN OLAHAN SINGKONG UMKM DF DI KAMPUNG KERIPIK KECAMATAN SELOREJO KABUPATEN BLITAR Eko Wahyu Budiman; Riska Damayanti
BUANA SAINS Vol 23, No 1 (2023)
Publisher : Universitas Tribhuwana Tunggadewi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33366/bs.v23i1.4622

Abstract

The purpose of this study is to identify the marketing mix, identify internal factors and external factors, and identify appropriate alternative strategies. The method used is the 7P marketing mix and SWOT analysis. Based on the results of research and discussion, the most influential internal strength factor is affordable product prices score 0.36, in terms of promotion weaknesses with a score of 0.08. The influential external factor in terms of opportunity is the development of social media score of 0.36. In the threats, the most influential competitor's human resources are superior. The competitors' distribution channels are wide score 0.14. SWOT analysis is in quadrant I supports an aggressive growth policy and growth-oriented strategy, by utilizing the company's strengths to obtain as many opportunities as possible. Alternative strategies which implemented are working with related parties (gift shops), increasing production quantity, and utilizing social media in promotions.
KAJIAN SISTEM CADANGAN PANGAN MASYARAKAT PEDESAAN DAN PERKOTAAN AKIBAT COVID 19 UNTUK MENGURANGI RESIKO KERAWANAN PANGAN DI MALANG RAYA Arifin, Zainol; Khoirunnisa, Ninin
BUANA SAINS Vol 23, No 1 (2023)
Publisher : Universitas Tribhuwana Tunggadewi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33366/bs.v23i1.4892

Abstract

Along development Covid 19 which puts forward aspect Economy and aspect social, then serious attention. There is an impact on endurance food with an increased request for food society. So solution offered is to strengthen institutional food in the area by observing the existence of unrest in public due to covid-19. This study aims to analyze composite individual and vulnerability food for knowing the scarcity of food consequence covid 19, and the Vulnerability consequence impact covid 19 during a pandemic.Ln= α i X i +β Ability: Pi = method opportunities scale small to hold stash food because Pi = 1 for scale small that can be conducted stash food and P i = 0 for scale small that doesn't conduct stash food. X i = Model of the predicted factors that influence household do backup food among other things, level production commodity food, land assets, level income house stairs, commodity prices food, i = variable estimator. Method controller logistics (logs). Model by large with give logit. The study chooses Malang City and Regency Poor as region studies. Analysis to provision reduced impact level starving held to the up level as well as small tiers scale macro analysis developed on area base marriage on empirical also obtained by World Food Program (WFP). Analysis subtraction risks vulnerable food conducted with simulation from indicator starving food tree that can be controlled, and related including growth agrarian nor development in the sector agrarian. Results analysis obtained village data that still have potency for vulnerability food, with beware existence covid 19 so have scales namely 1, 2 and 3. which later will so the recommendation to districts city in Malangraya During the pandemic.
PENGARUH LAMA FERMENTASI DAN DOSIS SERBUK GERGAJI KAYU JATI TERHADAP PERTUMBUHAN DAN HASIL TANAMAN BAWANG MERAH (Allium cepa L.) Var. BIRU LANCOR Retno Tri Purnamasari; A. Zainul Arifin; Fajar Hidayanto; Ilmiyah Ilmiyah
BUANA SAINS Vol 23, No 1 (2023)
Publisher : Universitas Tribhuwana Tunggadewi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33366/bs.v23i1.4916

Abstract

This study aims to determine whether there is a significant difference in the composting time of teak sawdust and the dose of teak sawdust on the growth and yield of shallots of the lancor blue variety. This research was conducted in Tidu Village, Pohjentrek District, Pasuruan Regency. This study used a factorial randomized block design (RBD) method consisting of two factors repeated three times. The first factor is the composting time (L) with L1: 4 weeks, L2: 6 weeks, and L3: 8 weeks. The second factor was the dose of teak sawdust (M) with doses of M1: 5 tonnes ha-1 , M2: 10 tonnes ha-1 , and M3: 15 tonnes ha1 . Overall there were nine treatment combinations. The results showed that composting time of 8 weeks and sawdust dosage of 15 tonnes ha1 resulted in a dry weight of wind on shallot bulbs of 10.74 tonnes ha-1
UJI KANDUNGAN ANTIOKSIDAN DAN FLAVONOID EKSTRAK BIJI TANAMAN MAHONI (Swietenia mahagoni) Siti Aminatuz Zuhria; Afiq Masruri; Dyah Ayu Sri Hartanti
BUANA SAINS Vol 23, No 1 (2023)
Publisher : Universitas Tribhuwana Tunggadewi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33366/bs.v23i1.4919

Abstract

Mahogany plants have many benefits, one of which is the seeds of the mahogany tree. The content of flavonoids in mahogany seeds is high and used as antioxidants. This study aimed to know antioxidant and flavonoid content of mahogany seed extract.The extraction method used in this study is the maceration method and antioxidant test using the DPPH method. DPPH solution was prepared by dissolving DPPH powder dissolved in ethanol p.a. Antioxidant inhibition test with several variations of concentration and inhibition values, namely 7500 ppm at 76.41%, 3750 ppm at 67.07%, 1875 ppm at 42.54%, 937.5 ppm at 22.13% and 468.75 ppm by 9.95%. The highest inhibition was at a concentration of 7500 ppm with an inhibition value of 76.41% and the lowest at a concentration of 468.75 ppm with an inhibition value of 9.95%. The result showed that mahogany seeds have high antioxidant levels with an IC50 value of 64.07 mg/ml. The content of flavonoids in mahogany seeds showed high levels with a value of 17.7 QE with an extract concentration of 100 ppm.
UJI KANDUNGAN FLAVONOID DAN TANIN PADA EKSTRAK DAUN DAN KULIT POHON KAYU MAHONI (Swietenia mahagoni) Syaiful Anam; A. Sri Hartanti; Miftachul Chusnah; Yessita Puspaningrum
BUANA SAINS Vol 23, No 1 (2023)
Publisher : Universitas Tribhuwana Tunggadewi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33366/bs.v23i1.4920

Abstract

The mahogany tree has many benefits, one of which is the leaves and bark of the mahogany tree. This study aims to determine the content of flavonoids and tannins in the leaves and bark of mahogany trees. The results of phytochemical tests on leaves and bark of mahogany trees showed high values. Extraction was carried out by maceration method and for phytochemical tests using spectrophotometry. Mahogany bark flavonoid content with an absorbance of 0.039 with a concentration of 100 ppm has a value of 6.6% QE(quercetin equivalent) while the highest content is found in mahogany bark, namely, the absorbance of 1.25 with a concentration of 400 ppm has a value of 6.34% TAE (tannic acid equivalent).
ANALISIS POTENSI LANSKAP CANDI PENINGGALAN KERAJAAN SINGOSARI DI KABUPATEN MALANG SEBAGAI OBJEK WISATA SEJARAH Debora Budiyono; Hendra Kurniawan; Astri Sumiati; Muh. Candra Kusumah
BUANA SAINS Vol 23, No 1 (2023)
Publisher : Universitas Tribhuwana Tunggadewi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33366/bs.v23i1.5027

Abstract

Malang Regency is an area that has many historical relics. One of the relics whose existence is preserved and can be visited is the temple landscape of the heritage of the Singosari kingdom which has the character and identity of the characteristics of the heritage of the Singosari kingdom. The Singosari Kingdom has several temples including Singosari Temple, Kidal Temple, Jago Temple, and Sumberawan Temple which are Hindu Buddhist temples based on the function, shape, and reliefs that exist in these temples. The purpose of this study is to analyze the potential of the temple landscape from the Singosari kingdom in the hope that it can be developed as a historical tourist attraction in Malang Regency, there are actions to preserve the temple landscape, and improve the economy of the local community around the temple. The research method used is descriptive quantitative. Based on the results of the analysis of existing path aspects, historical aspects, objects and attractions aspects, and visual aspects of the landscape in the landscape of the Singosari Temple, Kidal Temple, Jago Temple, and Sumberawan Temple, it shows that the four temples have the potential to be developed as historical tourism relics of the Singosari Kingdom in Malang Regency.
UJI AKTIVITAS ENZIM LIPASE PADA FRAKSI SKIM SANTAN TERHIDROLISIS moh su'i; Enny Sumaryati; Frida Dwi Anggraeni; Aghfariza Indriyani
BUANA SAINS Vol 23, No 1 (2023)
Publisher : Universitas Tribhuwana Tunggadewi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33366/bs.v23i1.4311

Abstract

Fresh coconut milk (not hydrolyzed) contains lipase enzymes. If coconut milk is hydrolyzed using lipase enzymes, it will produce free fatty acids, lauric acid, and monoglycerides (monolaurin), which have anti-bacterial and anti-viral activities. Besides that, hydrolyzed coconut milk can produce diglycerides which function as emulsifiers. During the hydrolysis process, it's a possibility of damage to the lipase enzyme due to the activity of the protease enzyme in coconut milk. The aim of this study is to examine the activity of the lipase enzyme in coconut milk which is hydrolyzed. The research used two factors, namely the first factor was the hydrolysis time (0, 24, and 48 hours) and the second factor was the incubation temperature (40 C and 55 C) which were arranged factorially. The study was repeated three times and used a randomized block design (RBD). The hydrolyzed fraction in the form of skim was tested for lipase enzyme activity, free fatty acid content, and yield. The results showed that coconut milk which was hydrolyzed for 2 days at 40 oC and 55 oC still contained the lipase enzyme with an activity of 3.49 to 9.40 units/ml. Large fatty acid levels ranged from 0.32 m mol/ml to 0.72 m mol/ml..
ANALISIS KARAKTERISTIK HIDROLOGI TERHADAP POTENSI SUMBER DAYA AIR BERDASARKAN ANALISA BMKG RCP 4.5 DI DAS SEJAHTERA, SULAWESI TENGAH Suhudi Suhudi; Kiki Frida Sulistiyani; Ratnasari Rambu Dulu Mosa
BUANA SAINS Vol 23, No 1 (2023)
Publisher : Universitas Tribhuwana Tunggadewi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33366/bs.v23i1.4987

Abstract

The Sejahtera River Basin is located in Sejahtera Village, Palolo District, Sigi Regency, Central Sulawesi with an area of 61,028 Ha. The watershed is one of the water resources used for rice field irrigation for the people in the area. The aimed of this study to determine the hydrological characteristics and how much reliable discharge is available in the Sejahtera Watershed for existing conditions and due to climate change. In 2003–2020 an analysis of hydrological characteristics was carried out and there was an increase in the reliable discharge of 20% or 24 l/sec caused by climate change in the Sejahtera Watershed where the rains became lighter with an increase in presentation capacity ranging from 0–10 and 11-20% with moderately increasing temperatures ranging from 0.65-0.70 and 0.71 – 0.75oC. The data used in this research is secondary data. The condition of the Prosperous Watershed is still quite good, so it needs to be maintained so that there are no changes in land use.

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