bluuebunny/crossref_metadata_2025_split huggingface dataset:
Production of N2O, CO2 gases and microbe responses in the soil amended with urea granulated zeolite
Authors: Jumadi Oslan , Pagoga Selvi , Rachmawaty  , Hala Yusminah , Hiola St. Fatmah , Karim Hilda , Syahruddin Kaseng Ernawaty , Inubushi Kazuyuki 
Published: November 2019

Abstract
This research study aims to determine the production of nitrous oxide (N2O), carbon dioxide (CO2), the rate of ammonium-nitrate, microbe responses in soil following the addition of urea coated by zeolite under soil incubated. The result showed that urea granulated with zeolite in soil sample had a significant effect on the production of CO2and have no significant increase N2O productions. Therefore, the addition of urea with zeolite seems to decrease the production of N2O compared to urea alone. The concentrations of ammonium and nitrate during incubation time were significantly affected by the amended type of fertilizers. The availability of ammonium and nitrate in soil were increased by addition of urea zeolite 30%. The urea combinedzeolite increases the growth of the fungi population, while population of ammonium oxidizer bacteria seems appearedlower in soil that amended with fertilizer compared to the control. The study showed that urea granulated with zeoliteincreased the time availability of soil nitrogen.
Diversity of medicinal plants for pregnancy and postpartum care of Dayak Ngaju tribe in Mantangai sub-district, Kapuas regency, Central Kalimantan
Authors: Rohmat S , Nisyawati  , Rahayu S E 
Published: November 2019

Abstract
Traditional community still maintain their knowledge in utilizing plants for curing various of disease. The study of medicinal plants in Dayak Ngaju tribe was conducted from February – May 2017 in Mantangai sub-district. The aim of this study was to obtain new information of medicinal plants diversity for pregnancy and postpartum care. The ethnomedicinal data were gathered through open ended interview, semi-structure interview, participatory observation, and field survey. Data were analysed by Index of Cultural Significance (ICS), to determine the important of medicinal plants. The study recorded 57 medicinal plants species 36 family, which were utilized for pregnancy and postpartum care. Curcuma domestica and Piper longum has the highest value of ICS. Dayak Ngaju tribe used medicinal plants for the treatment of pregnancy and postpartum in the single or mixed herbs. They used that directly by eat the parts of plants, drink as beverages, and by steam bath.
Genotyping SNP rs7903146 TCF7L2 gene for detection T2DM in Indonesian melayu ethnic
Authors: Syamsurizal S , Handayani D , Kadri H , Badriyya E 
Published: November 2019

Abstract
The prevalence of T2DM is quite high in Indonesian Melayu ethnic. T2DM is a metabolic disorder that is difficult to cure but can be inhibited by its expression. T2DM expression inhibited by knowing its genetic markers. The strong genetic marker for T2DM and widely studied in other countries is SNP rs7903146 TCF7L2 gene. The aim of the research was to identify SNP rs7903146 in TCF7L2 gene as a genetic marker of T2DM in Indonesian Melayu ethnic. Identification of SNP rs7903146 TCF7L2 uses direct DNA sequencing methods and then bioinformatics analysis. SNP rs7903146 in TCF7L2 gene can be a genetic marker of T2DM in Indonesian Melayu ethnic.
Lawsonia inermis linnaeus leaf ethyl acetate extract evaluation on the kidneys of rats
Authors: Widyawati Tri , Syarifah Siti , Rita Anggraini Dwi , Sari Wahyuni Arlinda , Indah Sari Mutiara , Feriyawati Lita 
Published: November 2019

Abstract
Leaf extract of Lawsonia inermis Linn. leaf extract (EAE) showed the ability to decrease the high of blood glucose level and to protect the hepar of diabetic rats at dose 1 g/kgbw. The aim of the present study was to evaluate the effect of EAE on normal rats organs, namely the kidneys. EAE was obtained by serial extraction using n-hexane and ethyl acetate (EAE). 10 rats were divided into two groups that treated with EAE 1.25 g/kgbw (Group I) and distilled water (DW) 10 ml/kgbw (Group II) as control group, orally, once daily for 14 days. After 14 days the rats were sacrified for histopathological evaluation of kidney using hematoxyilline-eosine staining. Grossly, no difference was found on the kidney of DW- or EAE-treated groups. However, microscopically, kidney of DW-treated group showed normal structure of glomerulus and tubulus renalis, whereas EAE-treated group showed the congestion of tubulus renalis. The present study concluded that EAE 1,25 g/kgbw caused the inflammation of the kidney.
Coriandrum sativum l. (apiaceae) and elettaria cardamomum (l.) maton (zingiberaceae) for antioxidant and antimicrobial protection
Authors: Handayani Windri , Yasman  , Yunilawati Retno , Fauzia Vivi , Imawan Cuk 
Published: November 2019

Abstract
Spice plants are known for their compounds that are useful as foods flavoring, food preservatives, and medicines. This due to the presence of secondary metabolite compounds in plants such as terpenoids, flavonoids, phenols, and saponins. These compounds are known to be potential to inhibit microorganism’s growth causing decay in food and oxidation. The use of these sources for applications in the food sector is relatively safer and environmentally friendly than the use of antibiotics in general. This study was conducted to determine the antimicrobial and antioxidant activities from Coriandrum sativum L. (coriander) and Elettaria cardamomum (L.) Maton (cardamom). The essential oil extract from these plants was tested for phytochemical content qualitatively for terpenoid screening and by using Gas Chromatography-Mass Spectroscopy (GC/MS). Furthermore, the antioxidant activity from the oil extracts was tested by DPPH method. Meanwhile, their ability to inhibit gram-positive bacteria Staphylococcus aureus and Gram-negative bacteria Escherichia coli were tested by paper disc method. The phytochemical characterization showed a positive result of terpenoid and GC/MS result showed dominant of monoterpenes compounds, such as α-pinene and ß-pinene. The DPPH results revealed that the essential oils have different antioxidant and antimicrobial potential, whereas Coriander tends to have a higher antimicrobial activity, while Cardamom superior in antioxidant activity. These results will become the basis for the development of potential essential oil with the best antimicrobial activity for food active packaging materials.
Plants used in the traditional ceremony in kanagarian tiku
Authors: Des M , Rizki  , Fitri Melisa 
Published: November 2019

Abstract
The use of plants in traditional tribal ceremonies is a culture. Kanagarian Tiku are inhabited by 3 tribes, namely Minangkabau, Java and Nias. In carrying out the Traditional Ceremony in Kanagarian Tiku each tribe still uses traditional plants. The traditional ceremonies examined are traditional ceremonies of marriage, birth, death and the first milestone. The purpose of this research is to find out the type of plant, the part used and its function in traditional ceremonies of each tribe. Data collection with survey methods, interviews and plant collections. Respondents interviewed were ninik mamak, tribal chiefs, bundo kanduang and people who used to look for plants for traditional ceremonies. The results showed that 44 plant species were used in traditional ceremonies and belonged to 27 families. Parts of plants used by roots, stems, leaves, flowers, fruits and seeds. The most widely used part of the plant leaves 36.4% and the least seeds are only 1%. At the Minangkabau and Javanese tribal wedding ceremonies using 7 species, the Nias tribe is 5 species. In traditional birth ceremonies and the first milestone only performed by Minangkabau tribes using 20 species and 13 species. In the traditional ceremony the death of the Minangkabau tribe uses 10 species, Java 9 species and Nias 6 species. Plants that have the highest utilization rates are found in Piper betle, Areca chatecu, Uncaria gambir, and Nicotiana tabacum with UV 0.33.
Optimization of pectin extraction from kepok banana peels (musa paradisiaca) using surface response methodology
Authors: Pagarra H , Hartati  , Purnamasari A. B , Rachmawaty  , Rahman Roshanida A. 
Published: November 2019

Abstract
The experimental design in this study was used to optimize the results of extracting pectin from kepok banana peels by surface method. The model for predicting and optimizing the process of extracting kepok banana pectin consists of 4 axillary points, 4 factorial points, and 5 middle titlication replications using a central commision design (CCD) with DX6.0.4 software. The independent variables used in the optimization of the extraction results of kepok banana pectin are pH and temperature, where the pH is between 1.5 - 2.5 and temperatures are 60°C-100°C and the combination of independent and bound variables (extraction time). The results of pectin extract ranged from 5.79% to 22.57% (b / b, based on the dry weight of kepok banana peel). The variables of pH and temperature, the interaction between pH and temperature, and the interaction between extraction time and pH significantly influence. The optimum conditions for extraction of pectin are estimated at pH (2.5) and temperature (100°C). In optimal conditions, the actual pectin yield is 22.57%, which is below the estimated extraction condition of 21.286%. Analysis of variance, adj R2 and R2, model lack of fit test, and p value statistically indicate that the model is adequate in representing experimental data. The effect of pH and extraction temperature was very significant (P <0.001) on the extraction results of kepok banana peel pectin. This shows that these two variables are very important in the process of extracting kepok banana peel, where the R2 value is 96.01%.
Effect of early ambulation to peristaltic activity of abdominal post-operative patients in Medan city hospital, Indonesia
Authors: Wahyuni S , Wahyuni AS , Tarigan R , Syarifah S 
Published: November 2019

AbstractPostoperative periods of high-risk abdominal surgery cause problems with intestinal peristaltic activity. Manipulation of the abdominal organs during surgical procedures may cause a normal peristaltic loss for about 24-48 hours, depending on the type and duration of surgery. One of the abdominal postoperative recovery processes can be pursued by the planning and implementation of early ambulation ie the immediate stages of activity in postoperative patients starting from waking up and sitting on the bedside until the patient gets out of the bed, stands up and starts walking with assistance in accordance with the patient’s condition. This study aims to identify the effect of early ambulation on the intestinal peristaltic activity of abdominal postoperative patients in Haji Medan Hospital. This research is a quantitative research of quasi-experimental (pre and post-test with the control group). The sample of this research is abdominal postoperative patients of counted 74 respondents that are 37 people in each group taken using consecutive sampling technique. The data collected using an observation sheet of intestinal peristaltic activity with a stethoscope and a watch. Bivariate analysis using statistical analysis with Wilcoxon Test to analyze the pain intensity of control and intervention group before and after the early ambulatory intervention. Mann Whitney Test used to analyze intestinal peristaltic activity between control and intervention group after the early ambulatory intervention. The results of bivariate analysis showed that there was a difference of intestinal peristaltic activity in the control group and the intervention group before and after the early ambulatory intervention (p = 0.000, p <0,05), there was a difference of intestinal peristaltic activity between the unpaired groups after the early ambulatory intervention (p = 0.000; p <0.05). The results of this study can be an input for nursing services and studies to apply the method of early ambulation in accordance with the stages and conditions of abdominal postoperative patients on postoperative peristaltic activity.
Phytochemical screening and total lipid content of marine macroalgae from Binuangeun beach
Authors: Nugroho Jati Bumiarto , Nuraeni Chicha , Yunilawati Retno , Oktarina Eva 
Published: November 2019

Abstract
Marine macroalgae has potent applications for food, pharmaceutical and cosmetic. Several species of green and brown macroalgae from Binuangeun beach have been collected and analyzed by phytochemical test and total lipid content. Phytochemical screening has been carried out to discover bioactive compound in macroalgae. The lipid of algae contains fatty acid, oxylipins, and sterol, which has nutritional dan chemo-taxonomic properties. The results show the presence of bioactive compounds in green and brown macroalgae such as flavonoids, saponins and steroid. The analysis of total lipid content reveals that macroalgae of brown (Turbinaria sp.) and green (Tydemania sp.) species recorded the total lipid content, 5.69% and 5.87%, respectively.
The effects of the turbulator blade-angle variation on the intake manifold for improving the power and torque of 4-stroke motor cycle engine
Authors: Maksum Hasan , Purwanto Wawan 
Published: November 2019

Abstract
The motorcycle is a two-wheeled vehicle driven by a motor fuel. The motor fuel is a machine converting the thermal energy into the mechanical energy. The power and torque are one of the parameters that maintained in improving the motorcycle performances. One of the appropriate ways that can be generated use of enhancing the power and torque is to upgrade the combustion process by pairing the turbulators in the intake manifold. The pairing aims at producing the air vortex into the combustion chamber. The research finding of power and torque using the dynotest indicated that the turbulator used in the intake manifold at a 25 degree blade-angle decreased the power by 22% and torque by 9%. The use of turbulator in the intake manifold at a 40 degree blade-angle increased the power by 12% and torque by 3%. The use of turbulator in the intake manifold at the 55 degree blade-angle, on the other hand, decreased the power by 9% and the torque by 7%.
Calorific value of tibarau cane bio-briquette
Authors: Nurdin H , Hasanuddin  , Darmawi  , Setiadhi Y , Saddikin M 
Published: November 2019

Abstract
Tibarau sugar cane is a renewable energy plant that is very likely to be processed into solid fuel in the form of bio-briquettes. Development of bio-briquette tibarau as an effort in the effort of alternative fuels to reduce the energy of oil-fueled energy. In producing biobriquette tibarau fuel, which has a measurable quality and performance with its calorific value. The use of bio-briquettes tibarau is a potential in developing renewable energy to achieve national energy security. Through the process of making bio-briquette products with carbonization technology in the furnace at certain temperatures that occur in the increase of heat. From this study, the results were obtained in the form of developing a bio-briquette tibarau model which is recommended as an alternative fuel. Characteristics of bio- briquette of tibarau content using tapioca adhesive were 32270.26 k/kg at carbonization 3000C and composition percentage 80 : 20. While bio-briquettes tibarau by using damar adhesive amounted to 36943.08 kJ/kg. Carbonization temperature affects the calorific value of biobriquettes tibarau sugar cane. The carbonization process of briquettes developed into biobriquettes were very important in improving the performance of bio-briquette fuels.
Biosorption of Pb and Cd using gambir leaf (uncariagambirroxb) with silica gel immobilization technique
Authors: Diani A F , Yuniati  
Published: November 2019

Abstract
The Gambir plant (UncariagambirRoxb) is one of the largest commodities in West Sumatera. The Gambir plant contains high cellulose, lignin and tannin compounds which can be utilized as adsorbents to absorb dissolved metals in water. Biosorbents produced from Gambir plants contain tannin compounds that do not have strong bond structures and are so easily degraded, that it is necessary to strengthen the structure by immobilization using silica gel. The biosorbent made consists of BiosorbentWithout Treatment (BWT) and Biosorbent Treatment Silica Gel (BTSG). This research was conducted to determine the ability of leaves of Gambir in absorbing cadmium (Cd). This study was conducted using a batch system. Characteristics of bisorbent obtained for BWT type with moisture content 1.27%, volatile 10.77%, ash content 2.62% and bound carbon content of 85,48%. As for biosorbent type BTSG obtained water content value 5.19%, volatile 21%, ash content 53% and carbon content bound by 24,6%. The optimum conditions obtained are the type of BTSG. Where is the size,concentration of initial waste, dosage and contact time of biosorbent are very influential on the adsorption process. Where the optimum condition are with the biosorbent size of 60 mesh, the concentration of 25 ppm, bisorbent dosage of 5 mg/L and contact time of 30 minutes. The reaction rate runs on the second order and the isotherm adsorption is Freundlich. The recovery rate obtained is 6.39%,energy free Gibbs is -0.068 kJ/mol.
The impact of problem-based learning model and visual-spatial intelligence to geometry achievement of junior-high-school students
Authors: Zusti Jamaan Elita , Nomida Diana , Syahrial Zulfiarti 
Published: November 2019

Abstract
The aim of this study was to determine the effect of problem-based learning model and visual-spatial intelligence in developing student’s geometry achievement. This study used non-equivalent control group design and the sample collection technique was purposive sampling. The populations were students of class VIII SMP 7 Padang in the school year of 2017/2018 involving 32 students of class VIII.2 as an experimental class and 32 students of class VIII. 1 as the control class. The instrument used in this study was test of visual-spatial intelligence and geometry achievement. The data were analyzed quantitatively by using independent samples two path analysis of variance. Based on the data analysis, it was found that: (i) the geometry learning outcomes of students learning with PBL model was higher that those learning with DL model; (2) geometry learning outcomes of students having high spatial-visual intelligence were higher than students having low spatial-visual intelligence; (iii) there was interaction between the application of PBL model and spatial-visual intelligence; (4) students having high spatial- visual intelligence got higher geometry learning outcomes after learning with PBL model compared with that after learning with DL model.
The effectivity of APOS model based worksheets on the improper integral
Authors: Hanifah  , Irsal N A 
Published: November 2019

Abstract
The APOS model is a mathematical learning model based on APOS theory, with syntax consisting of phases: Orientation, Practicum, Small Group Discussion, Classroom Discussion, Exercise and Evaluation. The APOS model has been implemented in Integral Calculus courses by Class A Semester 3 Students in Mathematics Education Study Program FKIP UNIB 2017/2018 TA. Specifically for the improper integral subject, there are five students who choose to discuss improper integral LK independently in group. The purpose of this study is to see the effectivity of APOS Model Based Worksheets on the Improper Integral subject matter. The effectivity was analized from the mastery of the improper integral by giving a test, if the five students were still master the material, after the launch time of up to two months. The instrument used were a test, and an open questionnaire. From the results of this study, we conclude that mastery of the material was in category “very effective”. Based on the polling from the questionnaire, it can be concluded that the worksheet based on the APOS Model was effective to help the development of independent, diligent, thorough, resilient, responsible, jointly active, helpful, critical and creative characters of students. So, the Apos Based Worksheets was effective to use in calculus class on the Improper Integral material.
The validity of problem solving based teaching material on mathematical literacy in theme integrated learning
Authors: Rifandi R , Puspita V , Mulyati A 
Published: November 2019

Abstract
The study aimed to produce a valid teaching material of mathematics literation with problem solving based in theme integrated learning on grade VI of primary school. The teaching material will promoted to be used as a complementary tool in the implementation of 2013 curriculum in classrooms. The study was conducted using the McKenney and Reeves development model. This consists of preliminary study, prototyping, evaluating and revising the prototype and producing the final product. The instruments used in the data collecting process were the validity of the teaching material. The data obtained in this study was quantitative data from validators.
Beliefs, knowledge, teaching practice: three factors affecting the quality of teacher’s mathematical problem-solving
Authors: Siswono T Y E , Kohar A W , Hartono S 
Published: November 2019

Abstract
Teacher knowledge and beliefs are known to play crucial roles in shaping teacher teaching practice regarding mathematical problem-solving. Thus, assessing the teacher’s quality of mathematical problem-solving can be traced through such three factors. This paper aimed at exploring the elements of mathematics-related beliefs, mathematics problem-solving knowledge for teaching, and problem-solving-based teaching practice needs to be improved by mathematics teachers. Some empirical findings of assessing those three factors from a two-year research project involving a total of 288 teachers from primary and secondary school on teacher’s problem-solving were presented as the manifestation of teacher quality regarding mathematical problem-solving. More specifically, the teachers participating in such a research project were indicated to have beliefs about nature of mathematics, mathematics teaching and mathematics learning ranging from Instrumentalist view to problem-solving view. Also, it was found that teacher problem-solving content knowledge such as knowledge of mathematics problem and problem-solving strategies was insufficient to hold a problem-solving instruction. Furthermore, the teacher’s teaching practice, assessed by observing how the teacher participants guide their students to solve a mathematics problem following Polya’s four stages of problem-solving, range from directive to consultative teaching. In sum, beliefs, knowledge, and teaching practice are discussed as three interdependent factors which determine the quality of teacher’s mathematical problem-solving.
Validity and practicality of calculus teaching materials based on integrated ict contextual problems to improve students problem solving skills
Authors: Murni D , Helma  , Mirna  
Published: November 2019

Abstract
Most of the students in Calculus are not satisfactory. Some of the causes include: mathematics material has not been linked to contextual problems so that the learning process becomes less attractive, besides that students have not been able to utilize technological advancements to help understand the concepts of Calculus material, such as: graph making, derivative and integral calculations and their applications, and others other. The aim of the study was to determine the validity and practicality of Calculus Teaching Materials which are integrated ICT based contextual problems to improve students Problem Solving abilities. The research method used is R & D which is a method to produce a particular product and test the effectiveness of the product. Data collection instruments in the study included validity test sheets, practicality test sheets. The data analysis technique used is descriptive statistical analysis. The results of the study are the creation of an ICT-based calculus teaching material that integrates contextual problems to improve valid and practical student problem solving skills.