BERKALA SAINSTEK最新文献_第7页

Estimating The Ability of Lanceleaf Arrowhead (Sagittaria lancifolia ) in Phytoremediation of Heavy Metal Copper (Cu) 箭叶(Sagittaria lancifolia)对重金属铜(Cu)修复能力的评价

BERKALA SAINSTEK Pub Date : 2021-08-09 DOI: 10.19184/bst.v9i3.26667

Alfin Fatwa Mei Afifudin, R. Irawanto

引用次数: 4

Abundance and potency of Non-Symbiotic Nitrogen-Fixing Bacteria in Padang Sapu-sapu, Pejem Village, Bangka Bangka Pejem村Padang Sapu-sapu非共生固氮细菌的丰度和效力

BERKALA SAINSTEK Pub Date : 2021-07-28 DOI: 10.19184/bst.v9i2.20057

Hermiati Hermiati, E. Nurtjahya, I. Mansur

{"title":"Abundance and potency of Non-Symbiotic Nitrogen-Fixing Bacteria in Padang Sapu-sapu, Pejem Village, Bangka","authors":"Hermiati Hermiati, E. Nurtjahya, I. Mansur","doi":"10.19184/bst.v9i2.20057","DOIUrl":"https://doi.org/10.19184/bst.v9i2.20057","url":null,"abstract":"Padang sapu-sapu soil is similar with post-tin mining soil in its white sand texture and poor nutrient. One factor causes the disturbed land in Bangka Belitung islands is tin mining activity. One method to rehabilitate marginal soil is by utilizing the potential nonsymbiotic N2-fixing bacteria, which are able to fertilize the soil and is able to provide macro nutrient. This study aims to measure the abundance and potency of non-symbiotic N2-fixing bacteria in padang sapu-sapu, Pejem Village, Bangka. The site selection is determined by purposive sampling method and interviews and the samples were collected randomly. Isolation used selective media Ashby'`s Monitol Agar and Azospirillum media. Morphological characterization was conducted on isolates and a series selective test was carried out, i.e. hipersentivity test, hemolysis test, IAA phytohormone test and nitrogenase test. The study of the abundance population of non-symbiotic N2-fixing bacteria of two different locations showed that the total bacterial population in padang sapusapu is very small compared to its lowland forest. Isolate Azotobacter sp. TH105(a) from the lowland forests is potential as natural fertilizer.","PeriodicalId":353803,"journal":{"name":"BERKALA SAINSTEK","volume":"18 6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125616016","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Growth of Lactobacillus casei FNCC0900 in Media Based Umbi Porang Plant (Amorphophallus muelleri BI.) 干酪乳杆菌FNCC0900在无定形植物培养基中的生长

BERKALA SAINSTEK Pub Date : 2021-07-28 DOI: 10.19184/bst.v9i2.19034

Fitri Azhari, Rudju Winarsa, S. Siswanto, Kahar Muzakhar, E. Utarti, S. Sutoyo, S. Arimurti

{"title":"Growth of Lactobacillus casei FNCC0900 in Media Based Umbi Porang Plant (Amorphophallus muelleri BI.)","authors":"Fitri Azhari, Rudju Winarsa, S. Siswanto, Kahar Muzakhar, E. Utarti, S. Sutoyo, S. Arimurti","doi":"10.19184/bst.v9i2.19034","DOIUrl":"https://doi.org/10.19184/bst.v9i2.19034","url":null,"abstract":"Porang tuber (Amorphophallus muellerii BI.) Is a type of tuber that has a high enough glucomannan content of 67%. Glucomannan is very difficult to digest by humans directly so it takes the role of probiotics. L. casei bacteria FNCC0900 as a probiotic agent capable of utilizing glucomannan as a carbon source for growth. The purpose of this study was to determine the growth pattern and changes in environmental factors, namely the pH value of the probiotic bacteria L. casei FNCC0900 growth medium. The parameters in this study consisted of the highest cell density, generation time and pH value changes in Glucose Yeast Peptone Liquid Media, Porang Boiled Water Media and Porang Flour Liquid Media using the drop plate method which had 4 repeated calculations. Porang Boiled Water Liquid Media has a faster log phase period with a higher cell density than Porang Flour Liquid Media, but the shortest generation time is found in Porang Flour Liquid Media with the highest number of generations. L. casei FNCC0900 bacteria are more able to reduce the pH of Glucose Yeast Peptone Liquid Media compared to porang tuber-based media, so in this case L. casei FNCC0900 can be stated to be able to grow on porang tuber-based media with growth patterns, generation time, cell density and pH value. which varies.","PeriodicalId":353803,"journal":{"name":"BERKALA SAINSTEK","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117167317","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Antibacterial Activity of Liverworts of Dumortiera hirsute (Sw.) Nees Ethyl Acetate Extract Against Pathogenic Bacteria 多毛毛念珠菌的抑菌活性研究Nees乙酸乙酯提取物抗致病菌

BERKALA SAINSTEK Pub Date : 2021-07-27 DOI: 10.19184/bst.v9i2.22645

L. Luthfiah, D. Setyati, S. Arimurti

引用次数: 1

Designing A 3-Dimensional Campus Brochure Application Based On Augmented Reality 基于增强现实的三维校园宣传册应用设计

BERKALA SAINSTEK Pub Date : 2021-07-21 DOI: 10.19184/bst.v9i2.21958

Abd. Rachman Dayat, L. Angriani

{"title":"Designing A 3-Dimensional Campus Brochure Application Based On Augmented Reality","authors":"Abd. Rachman Dayat, L. Angriani","doi":"10.19184/bst.v9i2.21958","DOIUrl":"https://doi.org/10.19184/bst.v9i2.21958","url":null,"abstract":"STMIK Umel Mandiri as one of the universities in Jayapura is still less well known, apart from being relatively new in its age and the location of the campus building which is blocked by buildings. So that people sometimes do not know the exact location of the campus. To promote the campus, one of the advertising media used is brochures. Along with current technological developments, augmented reality technology has emerged which is able to combine 2 (two) realities, namely the real and virtual world. When used in brochures, it can provide a feel and experience for readers. So that promoting goods or services can be done more interactively, as well as providing more information to consumers about the product. This augmented reality technology is then used as a solution to the problems faced by STMIK Umel Mandiri in promoting its educational institutions. The purpose of this research is to produce an android application that can display a 3 (three) dimensional brochure model by utilizing augmented reality technology so that it can help the public to get to know the campus to be chosen well. The research method has several stages, namely collecting data about the needs of prospective new students regarding information about the STMIK Umel Mandiri campus, then making a 3 (three) dimensional model of the STMIK Umel Mandiri Campus Building. Then next, do the design of compatible augmented reality on smartphone devices using the Android operating system, and produce 3 (three) dimensional augmented reality objects. This research produces an application based on augmented reality technology that is used to help promote the STMIK Umel Mandiri Campus through devices with the android operating system.","PeriodicalId":353803,"journal":{"name":"BERKALA SAINSTEK","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116821253","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Application of Magneto-optical Characteristic in Liquid: Verdet Constant as Quality Indicator of Repeatedly Cooking Oil 液体磁光特性的应用:维代特常数作为重复食用油的质量指标

BERKALA SAINSTEK Pub Date : 2021-04-30 DOI: 10.19184/BST.V9I1.19074

Silfiana Puspita Sari, M. Misto, E. Purwandari

引用次数: 0

Genetic Study of Phenylthiocarbamide (PTC) Taste Sensitivity In Population of The Osing in Kemiren Village-Banyuwangi 克米仁村-班渝旺吉乌辛种群苯硫胺味觉敏感性遗传研究

BERKALA SAINSTEK Pub Date : 2021-04-30 DOI: 10.19184/BST.V9I1.19844

Fenny Indriani, R. Oktarianti, S. Wathon

引用次数: 2

Water Allocation Efforts with Water Balance Analysis in the Jatiroto Sub-Watershed and Asem Sub Watershed, Lumajang Districts 卢马江地区Jatiroto小流域和Asem小流域水资源平衡分析的水资源分配

BERKALA SAINSTEK Pub Date : 2021-04-30 DOI: 10.19184/BST.V9I1.22882

Gunawan Eko Prihantono, G. Halik, E. Hidayah

引用次数: 0

Antibacterial Activities of Seaweed (Eucheuma cottonii ) Extract Against Escherichia coli Bacteria 紫菜提取物对大肠杆菌的抑菌活性研究

BERKALA SAINSTEK Pub Date : 2021-04-30 DOI: 10.19184/BST.V9I1.18184

S. Sukmawati

{"title":"Antibacterial Activities of Seaweed (Eucheuma cottonii ) Extract Against Escherichia coli Bacteria","authors":"S. Sukmawati","doi":"10.19184/BST.V9I1.18184","DOIUrl":"https://doi.org/10.19184/BST.V9I1.18184","url":null,"abstract":"Indonesia is a maritime country that has more than 70% of its territory dominated by oceans and is a marine area that has abundant natural resources, one of which is Eucheuma cottonii. The content of compounds by E. cottonii has many benefits, the compound content of E.cottonii is a phenolic compound (flavonoids). Flavonoids found in seaweed E. cottonii are secondary metabolite compounds that can produce antibacterial activity. The purpose of this study was to determine the antibacterial activity of seaweed extract (E. cottonii) against Escherichia coli bacteria. The method that has been used in this research is descriptive method, including extraction, maceration, antibacterial activity test. The results of this study stated that the antibacterial activity of E. cottonii seaweed extract was able to inhibit the growth of E. coli bacteria. The highest antibacterial activity was found at a concentration of 50% ppm dry extract solution with a methanol solvent of 3.3 mm while the lowest antibacterial activity was found at a concentration of 5% ppm wet extract solution with a methanol solvent whose inhibitory activity value was 0.1 mm. Furthermore, the antibacterial activity test for positive control showed a strong inhibitory value of 7.8 mm, while the negative control did not indicate any inhibitory value against E. coli bacteria.","PeriodicalId":353803,"journal":{"name":"BERKALA SAINSTEK","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129948652","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

The Comparison of Prediction Model of Lowering Rate Road Surface Damage Between RCI and SDI Method in Lumajang Regency 鲁马江地区RCI法与SDI法路面损伤降低率预测模型的比较

BERKALA SAINSTEK Pub Date : 2021-04-30 DOI: 10.19184/BST.V9I1.22922

Yulianata Halim Afandi, D. J. Koesoemawati, Akhmad Hasanuddin

{"title":"The Comparison of Prediction Model of Lowering Rate Road Surface Damage Between RCI and SDI Method in Lumajang Regency","authors":"Yulianata Halim Afandi, D. J. Koesoemawati, Akhmad Hasanuddin","doi":"10.19184/BST.V9I1.22922","DOIUrl":"https://doi.org/10.19184/BST.V9I1.22922","url":null,"abstract":"Sand mining was a non-metal mineral commodity which had very good quantity and quality for building materials in Lumajang district. It was found in lava routes or large rivers in the Pasirian sub-district at Lumajang district. The location of sand material was in a river that passes through the regency road. This result was in many road damage in the district area. The efforts to overcome the damage that often occurs on roads in Pasirian sub-district included road improvement activities supported by road surface surveys using the RCI method which has been used in reporting basic road conditions. This study aim conducted of comparing the RCI survey method and predicting a decline in the last 3 (three) years to 2021 with the SDI survey method in 2021. The value being compared was in good condition from the overall report. After predicting the reduction in road damage with the regression method from the survey results of road conditions in 2017 - 2020 with the RCI method, the equation Y = -11,807 x 2021 + 23868 has a prediction of a decrease of 6,053%. After carrying out a survey of road conditions used the SDI method in 2021 on district roads in the Pasirian sub-district. There was an 8% decrease in good conditions. On the road in the Pasirian regency area, the decrease in the condition of the road surface was due to one of the factors being the excessive traffic load (over loaded) which causes a steady condition of the sections around the sand mine in the Pasirian sub-district.","PeriodicalId":353803,"journal":{"name":"BERKALA SAINSTEK","volume":"427 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123437951","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0