bluuebunny/crossref_metadata_2025_split huggingface dataset:
The changes of starch and sugar on fermented of mixture of cassava and sweet potatoes using local tape ragi
Authors: Muhiddin Nurhayani H. , Ramlawati  , Yanti Nur Arfa , Mun’im Abdul 
Published: November 2019

Abstract
The aims of this study is to determine the change of starch and sugar content on cassava roots and sweet potato substrates through local “Tape Ragi” fermentation. The type of research is experiment with solid substrate fermentation method. The cassava roots and sweet potato mixture substrate is made with variation of concentration 1:0; 1:1; 1:3; 3:1 and 0:1. The tape ragi used is obtained from the traditional market of Bone regency of South Sulawesi province which is the result of selection in previous research. Analysis of starch content on products using enzymatic methods. The principle of analysis by such methods is starch extracted by dimethyl sulfoxide and acid, hydrolyzed by enzyme amyloglucosidase into sugar. The sugar content is determined by the determination of total sugar, and the starch content is 0.9 times the sugar content. The results of this study shows that the fermented mixture of cassava roots and sweet potatoes using local tape ragi B causes changes in starch and sugar levels. Level of starch on cassava roots subtract treatment (K), mixture of cassava roots and sweet potato with ratio 1: 1 (K1J1) and cassava roots and sweet potato mixture with ratio 3: 1 (K3: J1) decreased. The treatment of sweet potato substrate (J) and cassava roots mixture and sweet potato mixture with ratio of 1: 3 (K1J3) actually increased to 24.84% from 22.78% before fermentation and 33.57% from 27.48% before fermentation. All variations of the substrate treatment experienced a change in the increase in the amount of sugar content after fermentation using local tape ragi.
Isolation and characterization of Lactic Acid Bacteria (Lactobacillus sp) from strawberry (Fragaria vesca)
Authors: Fevria Resti , Hartanto Indra 
Published: November 2019

Abstract
The principle of making yoghurt is fermentation of milk with the addition of lactobacillus (LAB) and Streptococcus bacteria. LAB often found naturally in fruits and vegetables. One of the fruits that is thought to contain lactic acid bacteria is strawberries (Fragaria vesca). Strawberry are thought to be one of the natural media of bacteria including lactic acid, because strawberry contain various chemical compositions that are needed as a substrate for LAB. The purpose of this study is isolate LAB from strawberry and determine the type of LAB produced microscopically. Research methods, the ingredients used are strawberry obtained from community plantations in Aie Angek, Tanah Datar district, with Merck NA media, oxoid MRSa, 0,9% NaCl, crystal violet paint from biological laboratories of Universitas Negeri Padang. Isolation LAB from strawberry done in two ways, the first with plant strawberry tissue directly into the NA medium and the second with fermentation strawberry and then plant the strawberry into the MRSa medium with streak plate methods. The isolates obtained were identified microscopically using a microscope with gram staining method. From the research that has been done, the following result are obtained : (1) Plant strawberry tissue direcly into NA medium and gram staining, there were 2 colonies of gram positive bacteria with bacil cell form. (2). Fermentation strawberry from the results, there were 2 colonies gram positive bacteria with bacil cell form. We can identify this colonies as Lactobacillius bulgaricus.
Distribution of wanga plant (piga fettaelata) in South Sulawesi
Authors: Syamsiah  , Hiola St. Fatmah , Kurnia Nani , Hala Yusminah 
Published: November 2019

Abstract
This study aims to determine the distribution of wanga plants (Piga fettaelata) in South Sulawesi. This data is very important as a baseline for conservation or protection of these species to avoid extinction. The method used is an exploration method by exploring the forest and mountainous areas in South Sulawesi, namely the Latimojong mountain area in Enrekang Regency, in TanaToraja Regency, and in North Toraja Regency. The results showed that the Wanga plants in South Sulawesi were spread in nature in groups with a rather specific habitat that is near water sources, around small rivers, plantations, open fields found on the slopes of hills or former shifting cultivation that get light direct sun, and forest edge. This plant thrives in humid mountainous areas at an altitude of 788 to 1,540 m asl, with an average temperature between 20°C to 25°C.
A silver nanoparticle-based colorimetric detection of Fe2+
Authors: Handayani Windri , Intan Pratiwi Nur , Yulkifli  , Ramli  , Benti Etika Sri , Imawan Cuk 
Published: November 2019

Abstract
Silver nanoparticles (AgNPs) can be developed into materials for the detection of metals in the environment. The detection was carried out based on the color change AgNP colloids after reacted with metal ions, known as a colorimetric method. In this study, silver nanoparticles were obtained through biosynthesis using the aqueous extract of Diospyros discolor Willd. (Bisbul) leaves which was mixed with 1 mM of AgNO3 precursor. The characterization results using a UV-Vis spectrophotometer showed a peak in the range of 300500 nm which is the typical absorption spectrum of silver nanoparticles. Formation of AgNPs was also indicated by the solution color change from yellow to brown. After 24 hours of reaction, the formed AgNPs were tested as indicator solutions for 6 metal ions, namely Pb2+, Zn2+, Co2+, Mg2+, Mn2+, and Fe2+, at 1000 mg/L. The specific visual colour change was observed only when AgNPs solution was added into Fe2+ ion solution. Further testing was carried out to detect the presence of Fe2+ ions at 0; 0,1; 1; 10; 100; 500; and 1000 mg/L. The results showed a solution discoloration ranging from brownish to greenish. The change in solution color after AgNPs were added into Fe2+ solution was caused by AgNPs unique optical properties in the visible wavelength. Silver nanoparticles also tend to have an affinity with Fe2+ and showed larger size based on the PSA (Particles Size Analyzer) and TEM (Transmission Electron Microscope) characterizations. The results showed that the AgNPs tend to agglomerate after the addition of a higher concentration of Fe2+. This detection method has the potency to be developed and enhanced to detect the presence of Fe2+ metal ions in the environment.
The role of black soldier fly (BSF) hermetia illuncens as organic waste treatment
Authors: Sanjaya Y , Suhara  , Nurjhani M , Halimah M 
Published: November 2019

Abstract
Black Soldier Fly (BSF) become concern that it can solve environment problem. It can turn organic waste to biomass supporting the composition of its micro flora. The research aim to investigate agricultural waste in Lembang site west java.. Amount of bsf with 100 mg in weight was used in research in 200 g, 250 g and 300 g with two and three combination of waste product. The two combinations were bran + milk, bran + vegetable, fish + bran, afterward it was continuo with three combination that they were media of milk + vegetable+ bran and milk + vegetable + bran. All material were slice into small sizes, blend and measure. After pre pupae stage they were harvested. The result show at bsf treatment with two combination with fish waste + bran at 250 : 250 resulted the best bioconversion i.e 20 g compare to milk + bran (16 g) and waste vegetable (15 g) while with three combination of milk + vegetable waste + bran on 150+150+200 was the highest (26 g) compare to milk vegetable+ bran (24 g). This showed capability bsf to degrade material from organic material especially from protein.
Community partnership program (CPP): family prosperity construction (FPC) group of Rasi village, Ratahan district, southeast Minahasa: training on cavendish banana (musa acuminata, sp) flour production and m. acuminate flour-based biscuit
Authors: Lihiang A , Sasinggala M 
Published: November 2019

Abstract
Cavendish banana Musa acuminata, is one of the endemic plants in North Sulawesi, particularly Minahasa. The fruit is generally consumed after fried or boiled. Nowadays M. acuminate can be processed to make flour and used as material of many different fresh or dried cookies, such as cake, brownish, biscuit and many others. According to Sondakh (1990), M. acuminata flour contains 80.89% carbohydrate, 2.89% protein, 0.67% fat, and 2% coarse fiber. Therefore, the potential of M. acuminata flour processing gives more variable development opportunity that indirectly involves in accelerating the national food security achievement. The output target of this Community Partnership Program (CPP) is to make all Family Prosperity Construction (FPC) stakeholders be able to work as M. acuminata flour-based biscuit entrepreneurs using box packaging agreed, and all FPC stakeholders can manage the business cash flow well.
Habitat characteristics of Andaliman (Zanthoxylumacanthopodium DC) in North Sumatra using a GIS (Geographical Information System) approach
Authors: Suriani C , Prasetya E , Harsono T , Handayani D 
Published: November 2019

Abstract
Andaliman (Zanthoxylum acanthopodium DC) is a member of the Rutaceae family which is spread in the regions of East Asia, Southeast Asia, and South Asia. In the territory of Indonesia, andaliman is spread in the highlands of North Sumatra and parts of Aceh. Andaliman is a spice plant that is usually used as a spice for the Batak tribe in North Sumatra. This study aims to analyze the characteristics of andaliman habitat in North Sumatra. A total of 169 samples from 8 regencies in North Sumatra analyzed habitat characteristics using the ArcGis 10.3 program using various ecological data. The results showed that andaliman was widely distributed in the highlands in North Sumatra. Andaliman inhabits 4 soil types, namely Humic Acrisols (36.09%), Orthic Acrisols (34.31%), Humic Cambisols (18.34%), and Orthic Ferralsols (11.24%), 7 Types of land cover namely dry land agriculture (81.06%), open soil (0.59%), rice fields (6.5%), settlements (2.9%), secondary dryland forests (4.73%), shrubs (3.55%), and industrial plantations (0.59%). Andaliman inhabits a limited elevation between 854-2676 m above sea level. The highest number in elevation 1161-1526 (76.92%), 854-1160 (14.20%), 1527-1968 (7.69%), 1969-2676 (0.59%). In rainfall ecology variables, Andaliman occupies an area with rainfall between 1500-4000 mm/year. The highest number occupies rainfall between 1500-2000 (8.87%), 2000-2500 (83.43%), 2500-3000 (5.91%), 3000-3500 (0.59%), and 3500-4000 (0.59%) mm/annual. Most of Andaliman grew in areas with Critical land types (69.23%), rather critical (25.44%), critical potential (3.55%) and very critical (1.18%). Andaliman occupies a limited habitat character so that the right steps are needed in his conservation efforts. This research is expected to become important information in the conservation and cultivation efforts of andaliman in North Sumatra.
Phenotype analysis of endemic mahseer fish (neolissochilus sumatranus) from batang toru tributaries, north Sumatra, Indonesia
Authors: Imelda Roesma Dewi , Chornelia Ada , Mursyid Ahmad 
Published: November 2019

AbstractA Phenotype analysis ofNeolissochilus sumatranus(Cyprinidae) which is an endemic species to Sumatra Island has been carried from five tributaries of Batang Toru based on 23 morphometric and 14 meristic characters. The result showed the significance of characters differentiation in morphometric characters but no differentiation in meristic characters detected. Using Kruskal Wallis Test and Mann-Whitney U Test, the characters which showed significantly different among population related to body width and body depth, as well as to fin and eye diameter. Plot Principal Component Analysis (PCA) indicated the distinction clearly for each population. Phenotype variation betweenN. sumatranusin North Sumatra proving the local adaptation ability of fishes in different environments, and it probably related to the ability of morphological plasticity.
Relationship of presence larvaes aedes aegypti in the water containers with dengue hemorrhagic fever in the Sei Kera Hilir 1 village sub-district Medan Perjuangan Medan city
Authors: Panggabean M , Siahaan L , Panggabean Y C 
Published: November 2019

Abstract
The number of dengue hemorrhagic fever (DHF) cases endemic at the village Sei Kera Hilir I Sub-district Medan Perjuangan Medan City since 2017 which was 46 cases. One cause of the spread of dengue fever was a place of water container around the house that became the breeding ground for Aedes aegypti. This study aimed to know the relationship of presence of larva Aedes aegypti at water container with DHF incidence in the village Sei Kera Hilir 1 Sub-district Medan Perjuangan Medan City. This research was an analytic observational study with cross sectional design. The samples of this study were 100 homes taken by cluster sampling. The data was analyzed using Fisher’s Exact Test. The most commonly used water container was the bucket (56%), the most common water container with Aedes aegypti was the dispenser (16%), and there were 10 respondents with a history of DHF in the last 1 year. In bivariate analyses, the presence of larvae Aedes aegypti in water container significantly related to DHF incidence in the village Sei Kera Hilir 1 Sub-district Medan Perjuangan Medan City. There was a relationship between the presence of larva Aedes aegypti at the water container with the incidence of DHF in the village Sei Kera Hilir I Sub-district Medan Perjuangan Medan City.
Anticancer activity of uncaria gambir roxb on T47D breast cancer cells
Authors: Syarifah Siti , Widyawati Tri , Rita Anggraini Dwi , Sari Wahyuni Arlinda , Indah Sari Mutiara 
Published: November 2019

Abstract
Breast cancer was the second most common cancer that causes death in women worldwide. One ingredients of herbal plants as an alternative therapy in the community, was gambir leaves. This research was conducted to examine the anticancer activity of Uncaria gambir Roxb on T47D breast cancer cells in vitro. Six levels of concentration U. gambir (31.25 mg/ml up to 1000 mg/ml) was included on the 96 microplate well which had been filled with breast cancer cells, the positive control was doxorubicin (with concentration of 0.03-1 mg/ml). The anticancer effects of U.gambir was determined by MTT (3-[4,5-dimethylthiazol-2-yl]- diphenyl tetrazolium bromide 2.5). The results showed the existence of anticancer activity of Uncaria gambir Roxb at concentrations of 250, 500 and 1000 μg/ml. The largest anticancer activity found at a concentration of 500 μg/ml with the percentage of apoptotic cells of breast cancer by 20%, but we also found a decrease in the value of the apoptotic at concentration of 1000 μg/ml. The IC50 of U.gambir was 1.086 μg/ml whereas the IC50 doxorubicin was 0.108 μg/ml. This study concluded that the inhibition of breast cancer cell growth by gambir leaves extract was still quite weak compared to doxorubicin.
Environmental health knowledge factors have no effect on the formation of environmental vegetable farmers’ behavior in Padang city
Authors: Diliarosta S 
Published: November 2019

Abstract
The Food and Drug Supervisory Agency of the BPOM Republic of Indonesia reports that cases of extraordinary events (KLB) of food poisoning have caused the deaths of 2500 people and as many as 411,500 sick people annually. Responsibility and awareness of producers and distributors on food security is not adequate. The results of testing vegetables and fruit samples in 2017 found 17.56% containing pesticide residues. The lack of consumer concern about food security is reflected in the small number of consumers who demand producers to produce safe and quality food products. A model is needed in the formation of community behavior, especially farmers who produce vegetables in West Sumatra because they are far from being environmentally sound. The study of the formation of farmers’ behavior in producing safe and quality vegetables needs attention. In this article, more emphasis is placed on analyzing the influence of environmental health knowledge on the formation of environmentally sound behaviors of vegetable farmers in the city of Padang. The model used is a model of analysis, design, development, implementation and evaluation (ADDIE) conducted in Kuranji, Koto Tangah and Nanggalo Padang sub-districts. Based on the needs, it is done with a module, the video contains an explanation of the behavior of farmers, environmental behavior by farmers, technically, the benefits of environmentally friendly behavior by farmers. The results of the study concluded that there was no influence on the behavior formation model of environmentally sound vegetable farmers on increasing environmental health knowledge.
Pressure analysis of the ideal intake manifold with the vibration parameters at the diesel engine
Authors: Maksum Hasan , Purwanto Wawan 
Published: November 2019

Abstract
Using turbo as power booster still has left over one problem, namely, turbo lag. The turbo lag is still not resolved and Turbocharger technology development could not raise the engine’s maximum torque. The purpose of this study was to analyze the ideal intake manifold pressure on several variations of engine rotation and some treatments of turbochargers with the vibration parameters and to examine the smallest vibrations when there was a change into the intake manifold for shorter engine acceleration and smoother engine sound due to the lower vibration. The results gotten from this study were from the intake air in the intake manifold showed a decrease in the vibration of 7-10% and experienced an average increase in volumetric efficiency of 26.63% compared with the engines without turbo and 18.32% when compared with the engine with turbo standard. This proved that the perfect combustion was at the smallest vibration. The smallest vibrations on the engine in the same rotation described the pressure conditions and the combustion chamber in the ideal conditions.
Analyzing Limboto lake inundation area using landsat 8 OLI imagery and rainfall data
Authors: Eraku S , Akase N , Koem S 
Published: November 2019

Abstract
Limboto Lake is a natural lake located in Gorontalo Province. The condition of the lake is increasingly critical due to environmental damage and slowly loses its function. This study used Landsat 8 OLI imagery and rainfall data in the period of January 2015 to December 2016. The spatio-temporal map of the inundation area of Limboto Lake was obtained through automatic extraction method of water features with water index formula using GIS and Remote Sensing software. Analysis results based on Landsat 8 OLI image data showed that there was a large fluctuation in Limboto Lake inundation area during the study period. The largest inundation area is 4,043 ha and the smallest is 1,440 ha. This shows that the area of Limboto Lake inundation area can widen and shrink by almost 3 times. The results of analysis of rainfall data showed that large fluctuation in the Limboto Lake inundation area has a moderate correlation with the amount of rainfall that occurs. Rainfall which is the source of surface runoff and filling the Limboto Lake basin no longer has a major influence on the fluctuation of the Limboto Lake inundation area, only by 35%, there is an accumulation of other factors by 65% which is the cause the condition of large fluctuations in the Limboto Lake inundation area.
Predict the ability of students to conduct preliminary analysis using reverse and inverse regression
Authors: Helma  
Published: November 2019

Abstract
Real analysis is one of the courses to help the students gain experience in the type of critical thought. Students must understand the definitions and theorems to solve problems and perform an analysis process of thinking, so that student analysis develops to the given problem. The research that has been done shows that students’ ability to perform the analysis can be improved. But, not to be examined whether the ability to perform the preliminary analysis can be seen from the learning outcomes and how its results reflect the student’s ability to perform it. The problem is "Does the student’s ability to perform an analysis of the given problem can be predicted based on the learning outcomes that obtained?”. In this research used flow proof in performing a preliminary analysis. After theoretically analyzed the comparison between reverse regression and inverse regression, then established models and prediction interval of the students’ ability to perform the analysis. The result of this research is the ability of students to conduct an analysis can be predicted from their learning outcomes.
Preliminary research development of mathematics learning devices based on problem-based for student at the senior high school
Authors: Armiati  , Silvia Purwanti Henny 
Published: November 2019

Abstract
This article discusses the preliminary stage of research on the development of problem-based learning (PBL) tools for high school student. At the preliminary stage of the research, observations and interviews were conducted with mathematics teachers and high school student in class XI. Based on the results of the observation and interviews, the learning device used are still of a general nature and have not allowed the student to improve their mathematical problem-solving skills. Student rarely uses the LKPD and if the teacher does not do so, the content contains little material and many questions that did not allow the student to chat with friends or groups and present contextual problems. In the RPP, there is no step in the learning model used, so sometimes it does not meet the conditions and needs of the student.
Error analysis of mathematics teacher in solving calculus problem
Authors: Mukhni  , Mirna  , Khairani  
Published: November 2019

AbstractMathematics in senior high school has many subjects. One of them is calculus. In order to teach mathematics in senior high school, teacher must mastering calculus subject. But, even mathematics teacher find that calculus is a difficult topics to master and to teach. It was showed by mathematics teachers’ answer sheet where there were many mistakes. The aim of this study was to analysis mathematics teachers’ error in solving calculus problem. Type of research was descriptive qualitative. Sampling technique used purposive sampling. Sample was 31 mathematics teachers in Padang Pariaman. Instrument was teachers’ answer test. Result shows that teachers have different type of error, such as conceptual, factual and procedural error.
Implementation of formulate share listen create strategy to improve student’s problem solving and mathematics disposition ability
Authors: Sepriyanti N. , Yulia Y. , Nelwati S. , Sakinah H. , Afriadi J. 
Published: November 2019

Abstract
This research aims to improve students’ mathematical problem solving ability and mathematical disposition use Formulate-Share-Listen-Create (FSLC) strategy. The method used in this research is quasy experimental, with the design of randomized control group only design. The instrument research are students’ mathematical problem solving ability tes and mathematical disposition questionnaire. The data of posttest was obtained by using t–test after normality test and homogenity test. The results showed the student’s mathematical problem solving ability who used FSLC strategy is higher than conventional strategy. The student’s mathematical disposition who used FSLC strategy is better than conventional strategy.