bluuebunny/crossref_metadata_2025_split huggingface dataset:
Mathematical Creative Thinking Ability for Students Through REACT Strategies
Authors: Qadri Lailatul , Ikhsan M. , Yusrizal Yusrizal 
Published: June 2019

The ability to think creatively is important to create students who can use mathematical mindset in their daily activities, and in various sciences. The conditions at school this time show us that students still run into problems in resolve math questions which related to mathematical creative thinking ability that finally impact on the result is low for this ability. Therefore, we need strategy for mathematics learning so it can improve mathematical creative thinking ability for students. The strategy that can be applied are through Relating, Experiencing, Applying, Cooperating, dan Transferring (REACT). This research aims to know the improvement creative thinking mathematical ability for students through react strategy. The type of this research is experimental research with a quantitative approach. The populations in this study are students in class X SMAN 1 Banda Aceh. The sample in this study is students in class X MIA-3 as an experimental class that gets learning with REACT’s strategy, and students in class X MIA-1 as a control class that has conventional learning. The instrument of this research is the questions of pretest and post-test. The quantitative analysis using a test independent sample t-test. Based on the results of data analysis it can be concluded that improvement creative thinking mathematical ability for students by teaching with REACT’s strategy is better than improvement of students' creative thinking skills by teaching conventionally.
Solvent Effects on Protonation Constants of Betanin in Different Aqueous Solutions of Methanol at T = 25 ºC
Authors: Zabihi Fatemeh , Kiani Farhoush , Yaghobi Mojtaba , Shahidi Seyed Ahmad , Koohyar Fardad 
Published: June 2019

Abstract. The protonation constants of the betanin (pKa1, pKa2, and pKa3) were determined in mixed solvent of water and methanol containing 0, 10, 20, 30, 40, 50, 60, 70, and 80 % (v/v) methanol, using a combination of the spectrophotometric and potentiometric methods at T = 25 ºC and constant ionic strength (0.1 mol.dm-3 NaClO4). The obtained protonation constants were analyzed using Kamlet, Abboud, and Taft parameters. KAT parameters are α (hydrogen-bond donor acidity), β (hydrogen-bond acceptor basicity), and π* (dipolarity/polarizability). In this study, a good linear relationship was obtained between protonation constants (on the logarithmic scale) and dielectric constant (ɛ) of the water-methanol mixed solvents. It was found that the dual-parameter correlation between log10K,s and π*, β give us the best result in various volume fractions of methanol for water-methanol mixed solvent. Finally, the results are discussed in terms of the effect of the solvent on the protonation constants.

Resumen. Las constantes de protonación de la betanina (pKa1, pKa2 y pKa3) se determinaron en un disolvente mixto de agua y metanol que contenía metanol al 0, 10, 20, 30, 40, 50, 60, 70 y 80% (v / v), utilizando una combinación de los métodos espectrofotométricos y potenciométricos a T = 25 ºC y fuerza iónica constante (0,1 mol.dm-3 NaClO4). Las constantes de protonación obtenidas se analizaron utilizando los parámetros de Kamlet, Abboud y Taft. Los parámetros KAT son α (acidez del donante de enlaces de hidrógeno), β (basicidad del aceptor de enlaces de hidrógeno) y π* (dipolaridad / polarizabilidad). En este estudio, se obtuvo una buena relación lineal entre las constantes de protonación (en la escala logarítmica) y la constante dieléctrica (ɛ) de los disolventes mixtos agua-metanol. Se encontró que la correlación de doble parámetro entre log10K, s y π*, β nos da el mejor resultado en varias fracciones de volumen de metanol para el disolvente mixto agua-metanol. Finalmente, los resultados se discuten en términos del efecto del solvente en las constantes de protonación.
Comparative study of the release profiles of ibuprofen from polymeric nanocapsules and nanospheres
Authors: Llera-Rojas Viridiana Gisela , Hernández-Salgado Mauricio , Quintanar-Guerrero David , Leyva-Gómez Gerardo , Mendoza-Elvira Susana , Villalobos-García Rafael 
Published: June 2019

Abstract. Different carriers were obtained employing the emulsification-diffusion method in order to compare the release profile of a nonsteroidal anti-inflammatory drug from nanocapsules and nanospheres elaborated with Eudragit®. All the batches presented a submicronic particle size, good stability (ζ >30 mV) and the density test confirmed the nanocapsule and nanosphere structure. Evaluation of the release kinetics of ibuprofen using the Korsmeyer-Peppas model evidenced values for the “n” coefficient of 0.799 and 0.816 for nanocapsules and nanospheres, respectively. This indicates that both systems adhere an anomalous diffusion release mechanism that combines drug diffusion and erosion of the polymer.

Resumen. Se obtuvieron diferentes acarreadores mediante el método de emulsificación-difusión con el objetivo de comparar el perfil de liberación de un antiinflamatorio no esteroideo (ibuprofeno) en nanocápsulas y nanoesferas elaboradas con Eudragit®. Todos los lotes obtenidos presentaron un tamaño de partícula submicrónico, adecuada estabilidad (ζ >30 mV) y las pruebas de densidad permitieron confirmar la estructura de los sistemas preparados. La evaluación de la cinética de liberación de ibuprofeno utilizando el modelo de Korsmeyer-Peppas proporcionó coeficientes “n” de 0.799 y 0.816 para nanocápsulas y nanoesferas, respectivamente. Estos valores indican que ambos sistemas presentan un mecanismo de liberación anómalo, que combina los fenómenos de difusión del fármaco y erosión del polímero.
Analisis Pengaruh Non Performing Loan (NPL) dan Biaya Operasi Pendapatan Operasi (BOPO) Terhadap Return On Assets (ROA) pada Sub Sektor Perbankan yang Listed di Bursa Efek Indonesia
Authors: Altikari Ali Yusuf , Suryadi Edy , Safitri Heni 
Published: June 2019

Tujuan penelitian ini adalah untuk mengetahui pengaruh rasio keuangan terhadap Return On Assets, yang menggunakan rasio Non Performing Loan dan Biaya Operasi Pendapatan Operasi. Teknik pengambilan sampel yang digunakan dalam penelitian ini adalah metode purposive sampling. Untuk analisis statistik yang digunakan adalah analisis regresi linier berganda, analisis koefisien korelasi berganda, analisis koefisien determinasi (R2), uji pengaruh simultan (F) dan uji pengaruh parsial (t). Berdasarkan hasil uji normalitas bahwa semua data n bahwa terdistribusi normal dengan asymp.Sig. (2-tailed) 0,200 > 0,05. Berdasarkan nilai R (korelasi) yang diperoleh sebesar 0,222. Berdasarkan nilai koefisien determinasi (R2) yang diperoleh sebesar 0,049. Hal ini menunjukka4,9% pengaruh terhadap Return On Assets (ROA) dapat dijelaskan oleh variabel Non Performing Loan (NPL) dan Biaya Operasi Pendapatan Operasi (BOPO). Sedangkan sisanya 95,1% dipengaruhi oleh variabel lainnya yang tidak diteliti dalam penelitian ini.Berdasarkan nilai F dapat diketahui secara bersama-sama variabel independen tidak berpengaruh secara signifikan terhadap variabel dependen. Hal ini dibuktikan dari nilai F hitung sebesar 0,778 serta memiliki nilai signifikansi sebesar 0,468 yang lebih besar dari 0,05. Hasil dari uji t (parsial) variable Non Performing Loan (X1) dan Biaya Operasi Pendapatan Operasi (X2) tidak memiliki pengaruh yang signifikan terhadap ROA (Y).
Phenetic analysis of natural apricot populations in the Mountainous Dagestan for endocarp (stone) features
Authors: Anatov D. M. 
Published: June 2019

Background. Studying the intraspecies diversity of fruit crop wild relatives is one of the leading trends in botanical and genetic resource research associated with identification and utilization of the phenotypic potential of the population and species, the initial stage in plant breeding and introduction processes, and a prerequisite to solving a number of problems posed by the theory of microevolution, biosystematics and population biology. Currently, large tracts of wild apricot populations (Prunus armeniaca L. = Armeniaca vulgaris Lam.) have been preserved in Central Asia, China and Dagestan. The natural populations of apricot in the Mountainous Dagestan are spread along the valleys of the Avar Koysu, Andi Koysu, Kazikumukh Koysu and Kara Koysu rivers, at altitudes of 350–1500 m ASL, and (sporadically) over the southern slopes – up to 1900 m ASL. They prefer crushed limestone hillsides, where they form the so-called ‘apricot savannah’, rarely assembling into dense massifs. With this in mind, it seems theoretically and practically interesting to evaluate various forms in the diversity of natural apricot populations in the Mountainous Dagestan, with qualitative traits of their endocarp (stone) as a target.Materials and methods. To analyze the diversity of endocarp (stone) forms in natural apricot populations under the conditions of the Mountainous Dagestan, three model cenopopulations (CPs) were selected: in Gunibsky District, along the Kara Koysu (Lower Keger Vlg., 900–1200 m ASL) and Bagdakuli rivers (Salta Vlg., 900–1100 m ASL), and in Levashinsky District, along the Kazikumukh Koysu river (Burtanimakhi Vlg., 1000–1200 m ASL). Stones were collected along the slopes by using transect itineraries. Morphological description of endocarps was made for 328 trees according to 11 qualitative features by standard techniques.Results. A comparative analysis of natural apricot populations showed high variation in the size and shape of the endocarp. Five classes were identified for stone size; of these, the very small (37.8%) and small (37.5%) types had the highest percentage. There were seven types of the endocarp’s shape (rounded, ellipsoid, ovoid, oblong, prolate, teardrop-shaped, and semicordate). Ovoid or rounded shape was observed in an overwhelming majority of apricot trees: their share was 65.3% of the total diversity. Correlation analysis of the endocarp’s features revealed credible positive correlations between the traits (1) ‘keel height’ and ‘rib width’, and (2) ‘lateral rib type’ and ‘rib width’. Creditable negative correlations were found for the trait ‘keel pattern’ with ‘lateral rib type’ and ‘keel height’.
TECHNICAL AND ECONOMIC EFFICIENCY ASSESSMENT OF METAL ELEMENTS ABRASIVE-JET PROCESSING IN RAILROAD CAR BODIES
Authors: Куликов Михаил , Kulikov Mikhail , Кульков Анатолий , Kul'kov Anatoliy 
Published: June 2019

The efficient and durable coloration of cars at their manufacturing and repair needs preparation of surfaces to be painted which consists in ensuring their quality and forming proper roughness required for painting and degreasing. The paper reports the standard method offered for the assessment of technical and economical efficiency of railroad car metal surface processing with a free abrasive based on data of processing modes, materials used and quality of a clean surface obtained.
For this at the initial stage there was carried out the analysis of standards in the field of a metal pre-coloration processing for the purpose of the require-ments to the quality of a surface to be clean, roughness and a degree of degreasing. In the corresponding stand-ards there are defined three basic groups of surface preparation quality, which may be conditionally subdi-vided into high, average and low quality. The assess-ment of processing efficiency was carried out under a condition of ensuring the first quality group. For that there was carried out a comparison of four standard technologies of metal pre-painting for the purpose of the process efficiency, material consumption (power) and surface processing quality obtained. The comparison has shown that the highest effectiveness has a technology of thermal abrasive-jet processing. This technology allows avoiding chemical agents use for metal surface degreasing which allows decreasing material capacity of the process and increasing considera-bly a pre-painting productivity.
Effect Addition of Different Probiotic in Aquaponic Systems towards Water Quality in Aquaculture Catfish (Clarias sp.)
Authors: Pratama Willy Dhika , . Prayogo , Manan Abdul 
Published: June 2019

Catfish (Clarias sp.) is a type of consumption fish have promising prospects because it has a high enough degree of market uptake. The high market demand which motivated farmers to develop farming aquaponics technologies. Aquaponics, in principle, in addition to conserve land and water use also increases business efficiency through the utilization of nutrients from food remains and fish for plant metabolism. Fish farming with high stocking density causes a decrease in water quality due to the accumulation of organic matter buildup of organic materials causing toxins in the water because there is ammonia (NH3) and nitrite (N02) on the water. The threshold for catfish ammonia content is <0.8 mg /L. Alternative to overcome the problem of water quality in aquaculture is the addition of probiotic. Probiotic contain several types of microorganisms that can help the process of decomposition of ammonia as a bioremediation agent for water quality control. The purpose of this research is to determine the effect of different probiotics in the aquaponics system to water quality. The method that used in this research is experimental with completely randomized design (four treat and five repeated) are P0 (control), P1 (probiotic A), P2 (probiotic B) and P3 (probiotic C). Analysis of data processed using Analysis of Variance. If there are significant differences then continued Duncan's Multiple Range Test. The results showed that the giving of probiotics in the aquaponic system is significantly different (p<0.05).The final conclusion is that the addition of probiotic in the aquaponic system affect the water quality. Based on the results of statistical analysis showed that the levels of ammonia, nitrite and nitrate was lowest for the treatment of P2 is 0.0204 mg /L, 0.012 mg /L and 2.731 mg /L. Ammonia, nitrite and nitrate is highest at P0 treatment (control) is 0.273 mg /L, 0.019 mg /L, 4.218 mg /L.

Keywords : Aquaponic, Catfish, Probiotic, Ammonia, Nitrite, Nitrate, Clarias sp.
Effect of Pure and Combine Hormone of Pregnant Mare Serum (PMSG) on Gonadosmatic Index, Hepatosomatic Index of Silver Pompano Fish (Trachinotus blochii)
Authors: Atmaja Putra Wiwin Kusuma , Razai Tengku Said 
Published: June 2019

The research was title The Effect of Pregnant Mare Serum Gonadotropin (PMSG) Pure and Combinations against Gonadosomatik Index, Hepatosomatic Index Silver Pompano (Trachinotus blochii). The purpose of this research was to obtain the best hormone treatment to increase the gonadosomatic index and Hepatosomatic Index. This research used a Completely Randomized Design with 3 treatments and 3 replicates of fish. The treatments include Control (0.5 ml NaCl), PMSG (20 IU kg-1 fish body weight) and PG600 (20 IU. Kg-1 fish body weight). Parameters calculated include Gonadosomatic Index (GSI), Hepatosomatic Index (HSI) and Absolute Growth. The best results were PG600 treatment with Gonadosomatic Index (0.12±0.06), Hepatosomatic Index (2.29±0.15 %) and Absolute Growth (85±31.32 g) for 4 weeks. The conclusion of this study is the provision of pure PMSG and combination with a dose of 20 IU. Kg-1 body weight can increase gonadosomatik index, hepatosomatic index and absolute growth of Silver Pompano fish.

Keywords : Silver Pompano Fish, PMSG, PG600, Gonadosomatic Index
Fluctuations of tilapia asymmetry (Oreochromis niloticus) at Marine Mandiri Fisheries Training Center (P2MKP) Water World, Banyuwangi
Authors: Budi Darmawan Setia , Lutfiyah Lailatul 
Published: June 2019

Fluctuating asymmetry of the bilateral meristic characteristic is one of the simple methods that can be used to determine the stability of an individual fish development. This study aims to provide quantitative information about the level of asymmetry of Nile tilapia (Oreochromis niloticus) in Dunia Air Independent Training Center Marine and Fisheries, Banyuwangi through bilateral meristic characteristic observation. A total of 120 fish samples (5-7 cm) were measured in this study. Four bilateral meristic characters were calculated i.e. the number of soft pectoral fins, number of soft ventral fins, number of scales on the lateral line up and down. The results show that the highest value of the fluctuating asymmetry of magnitude (FAm) and fluctuating asymmetry of number (FAn) was obtained at the number of scales on the lateral line up those are 2.14 and 0.78, respectively. Meanwhile, the lowest FAm and FAn values obtained from the soft ventral fins which were 1.69 and 0.78, respectively. The sum of the total value of fluctuating asymmetry of each bilateral meristic characteristic was observed. The overall FAm value was 7.83 and the overall FAn value was 2.99.
Keywords: fluctuating asymmetry, Nile tilapia, PMKP Dunia Air
Effect of Chemical Compounds in Wastes from Essential Oil Distillation on the Activity of E.coli
Authors: Anugrahwati Mai , Wicaksono Wiyogo Prio , Nurlestari Rizqy 
Published: June 2019

Effect of chemical compounds in the wastes of essential oil distillation including lime leaves, lemongrass leaves, ylang-ylang flower, and coriander seed on the activity of Escherichia coli has been performed. In this research, observation was done by using microbial fuel cell (using E.coli) with two compartments were connected by nafion membrane and zinc plats were used as electrodes which were connected by copper wire and multimeter. Energy production from the cell was shown from the generated current due to the E.coli's oxidation activity to the substrates (distillation wastes). Results from the research exhibited that chemical compounds in the lime leaves positively affected to the bacterial activity with the generated current present up to 20 µA. It is also observed that mass variation of the substrates significantly affected the current generation. Chemical compounds in the three other wastes were found to be not as effective as lime leaves because from the analysis of their methanol extracts by GC-MS indicated that these contained antibacterial compounds such as octadecanoic acid and rosifoliol. Conclusion from the research was not all of wastes from essential oil distillation have a potency to be used as substrates in the microbial fuel cell as some of these chemicals had an antibacterial property which negatively affected the E.coli bacterial activity in the cell.

Keywords : microbial fuel cell, Escherichia coli, waste of essential oil distillation.
Abundance and Diversity of Bacteria on Catfish Nursery Rearing (Clarias gariepinus) With Closed Water System (Close Water System)
Authors: Azhar Muhammad Hanif , Ulkhaq Mohammad Faizal , Prayogo . 
Published: June 2019

This research aimed to identify types of bacteria existed in nursery rearing pond of catfish (Clarias gariepinus) using closed water system. The observed data include bacterial abundance and diversity in the water and in the fish digestion system, fish growth and water quality. This research was performed in the media of 3 concrete pools with the size of 3 x 1 x 0.8 m3 containing fish stock spreading of 3000 tail / pond. The obtained results showed that the highest abundance of bacteria was found in the surface and the bottom of pond C with the abundance number of 3,0 x 104and 1,2 x 103for aerobic and anaerobic bacteria, respectively. Moreover, it was figured that the dominant bacterial species found in the water and the gastrointestinal tract were from the genus of Bacillus, Clostridium and Lactobacillus. Meanwhile, water quality in the pond was observed in the normal range with the temperatures of 28 - 30 oC, pH (6.0 - 7.0), DO (4.5 - 5.7 ppm), ammonia (0.06 - 0.03 ppm), nitrite (0 ppm) and nitrate (0 - 5 ppm).

Keywords: Type of bacteria, catfish (Clarias gariepinus), Closed water system.
Total Haemocytes of Pacific White Shrimp (Litopenaeus vannamei) cultured at salinity of 10 ppt in various stocking density
Authors: Febriani Dian , Marlina Eulis , Oktaviana Adni 
Published: June 2019

This study aimed to determine total haemocytes and survival rate of pacific white shrimp cultured at 10 ppt in various stocking density. This study consisted of three treatments with three replicates. The shrimp was cultured at salinity of 10 ppt with different stocking densities: 150 shrimps/m2 (A), 200 shrimps/m2 (B), and 250 shrimps/m2 (C). The result showed that different stocking density affected significantly on the growth performance but gave no effect on the survival and the total of shrimp haemocytes. This study was conducted for five weeks. The best growth performance was seen in the treatment with stocking density of 150 shrimps/m2.

Keywords: Pacific White Shrimp, Salinity, Stocking density, Total Haemocytes, Survival rate.
Quality of Maternity Care and Client Satisfaction
Authors: Bhattarai Saraswoti Kumari Gautam , Gautam Kanchan 
Published: June 2019

Health service provided to pregnant women during antenatal, childbirth and postnatal period is essential for maternal and child health. Proper care during pregnancy, childbirth and postnatal period are important for the health of mother and baby. High maternal, infant and child morbidity and mortality demand improved healthcare which does not concern to coverage of health services alone. The health issues of pregnant women, mothers, infants and children need to be addressed with the attention to the quality of care (QoC). The Nepal Health Sector Strategy (NHSS) also identifies equity and quality of care gaps as areas of concern for achieving the maternal health sustainable development goal (SDG) target. So this review aims to sensitize and draw attention to the quality of maternity care and client satisfaction to improve maternal and child health. For this article, different studies related to the quality of maternity care and satisfaction from care service received on maternity care are reviewed.
Antepartum hemorrhage at a tertiary care teaching hospital in Nepal
Authors: Shrestha Sarada Duwal , Shrestha Reena , Singh Alka , Sharma Praban , Pradhan Anagha Malla , Lama Sushma 
Published: June 2019

Introductions: Antepartum hemorrhage (APH) is a serious obstetrical emergency and is a leading cause of maternal and perinatal morbidity and mortality. Incidence varies from 2-5% of all deliveries. The maternal and perinatal complications of APH are anemia, postpartum hemorrhage, shock, low birth weight, intrauterine fetal death and birth asphyxia.
Methods: This descriptive study was conducted at Department of Obstetrics and Gynaecology of Patan Hospital, a tertiary care teaching hospital of Patan Academy of Health Sciences (PAHS), Lalitpur, Nepal. All patients who were admitted after 22 weeks of gestation with diagnosis of antepartum hemorrhage from April 2012 to April 2016 were included.
Results: The incidence of APH was 0.23% in the present study. Out of 84 patients, 39.3% were in age group of 25-29 years, 63% were multigravidae, 63% had placenta previa, 92.3% lower segment caesarean section done in new onset APH and 53.1% done in previous admitted cases of APH, 23.8% developed hypovolemic shock, 14.3% needed blood transfusion, 9.5% had postpartum hemorrhage, 1.2% had caesarean hysterectomy, 54.8% had preterm delivery, 9.5% were admitted in neonatal intensive care unit and perinatal mortality was 10.7%.
Conclusions: APH is a major cause of maternal and perinatal morbidity and mortality. In our study, the most common cause of APH was placenta previa. The commonest mode of delivery was caesarean section. The major maternal complication was hypovolemic shock with consequent high blood transfusion rate and fetal complication in prematurity.