bluuebunny/crossref_metadata_2025_split huggingface dataset:
KELAYAKAN MEDIA ANIMASI HUKUM NEWTON II TENTANG GERAK PADA BIDANG MIRING DAN KATROL DI SMA KABUPATEN ACEH BESAR
Authors: Muslina Muslina , Halim Abdul , Khaldun Ibnu 
Published: April 2018

Abstrak. Penelitian ini dilakukan untuk mengembangkan media animasi hukum Newton II tentang gerak pada bidang miring dan katrol, mendeskripsikan kelayakan media animasi hukum Newton II yang dikembangkan baik dari segi kualitas, validitas, berdasarkan masukan para ahli, meminta tanggapan guru dan siswa terhadap media sehingga layak digunakan dalam pembelajaran fisika. Penelitian dilakukan di tiga sekolah kabupaten Aceh Besar (SMAN Modal Bangsa, SMAN 1 Montasik, dan SMAN 1 Krueng Barona Jaya) menggunakan metode penelitian reasearch and development (R and D) dengan model pengembangan ADDIE. Hasil pengujian alfa test menunjukkan bahwa media animasi hukum Newton II tentang gerak pada bidang miring dan katrol sangat baik/layak digunakan sebagai media dari segi validitas. Penilaian kualitas media dari aspek perangkat lunak, desain pembelajaran, desain media dan aspek komunikasi secara keseluruhan menunjukkan bahwa media mempunyai kriteria sangat baik dan layak digunakan. Pengujian beta testing yang didasarkan pada hasil uji/tanggapan pengguna oleh guru dan siswa secara keseluruhan memberikan respon positif terhadap media, sehingga media animasi hukum Newton II yang dikembangkan memiliki kriteria sangat baik. Dari hasil penelitian didapat bahwa kualitas media animasi yang dikembangkan memenuhi kriteria sangat baik dan layak digunakan sebagai media yang menunjang proses pembelajaran fisika. Kata Kunci : Media, Animasi, Katrol, Bidang Miring,Alfa test, Beta TestAbstract. This research was conducted to develop animation media Newton's second law of motion on an incline and pulley, describes eligibility animation media Newton's second law developed both in terms of quality, validity based on the input of experts, asking for a response of teachers and students to the media so it's worth used in learning physics. The study was conducted in three school districts of Aceh Besar (SMAN Modal Bangsa, SMAN 1 Montasik and SMAN 1 Krueng Barona Jaya) using research methods reasearch and development (R and D) with ADDIE development model. The test results showed that the alpha test animation media Newton's second law of motion on an incline and pulley very good / decent used as a medium in terms of validity. Quality assessment of aspects of the software media, instructional design, media design and communication aspects of the overall show that the media has a very good criteria and fit for use. Testing beta testing based on the test results / user feedback by teachers and students as a whole give a positive response to the media, so the media animation Newton's second law which has developed criteria very well. The result is that the quality of animation media which meet the criteria developed very well and fit for use as a media that support the learning process of physics.Keywords: Media, Animation, Pulleys, Field Leaning, Alpha Test, Beta Test
Os repositórios das universidades federais do Brasil e suas políticas de informação
Authors: Baggio Claudia Carmem , Blattmann Ursula 
Published: April 2018

Esta pesquisa tem por objetivo a identificação das políticas implantadas nos repositórios das 63 Universidades Federais do Brasil onde se pôde compreender a importância de fomentar mecanismos para dar visibilidade à produção acadêmica. Utiliza a pesquisa documental como método de coleta de dados nos repositórios institucionais selecionados. Foram selecionados para análise aqueles que contemplam em todo seu escopo aspectos organizacionais, técnicos e legais ou que possuam características de um programa de preservação digital. Entre os resultados destacam-se as 20 IFES que possuem políticas de informação instituídas e disponibilizadas nos seus Websites. A conclusão possibilita oferecer subsídios aos dirigentes dos repositórios para construção de políticas de informação, estas políticas facilitam a organização e a disseminação da informação, o que traz benefícios tanto para a comunidade científica e institucional quanto para a sociedade de um modo geral.
Objetos de Aprendizagem para o Letramento Informacional
Authors: Gasque Kelley Cristine Gonçalves Dias 
Published: April 2018

Apresenta fundamentos básicos para a produção de objetos de aprendizagem (OAs), bem como resultado de pesquisa exploratória sobre a percepção de estudantes sobre a produção dos referidos recursos. A produção dos OAs requer conhecimentos que envolvem questões de conteúdo, de ensino-aprendizagem e conhecimentos técnicos. Os resultados mostram que os sujeitos reconhecem a importância dos objetos de aprendizagem para potencializar o processo de ensino-aprendizagem e demonstram disposição e motivação no processo de produção, mas também ressaltam a necessidade de melhorar a interface dos softwares para torná-la mais amigável e intuitiva.
Використання в будівництві теплоефективної порожнотілої кераміки та пористих бетонів
Authors: Nedbailo O.M. , Chernyshyn O.G. 
Published: April 2018

Розглянуті деякі науково-технічні аспекти проблеми ресурсозбереження при масовому будівництві та експлуатації енергоефективних (опалюваних) будівельних об’єктів. Звертається увага на необхідність використання виробів із пористих бетонів, насамперед із автоклавного ніздрюватого бетону й гідрофобізованого цементного перлітобетону.
У результаті теоретичного аналізу встановлено, що міцність пористих композиційних матеріалів будівель- ного призначення із ніздрюватою або зернистою структурою суттєво залежить від факторів у вигляді певних функцій або параметрів.
Встановлено, що активована цементна суміш містить дисперговані частинки клінкера зі зменшеним у 1,4 – 1,5 рази електрокінетичним потенціалом, що сприяє формуванню більш щільної та міцної зі зменшеною усад- кою структури цементного каменя. Недоліком пресової технології є неможливість виробництва виробів з різни- ми розмірами та необхідність застосування дефіцитного волокнистого заповнювача при виготовленні теплоізоляційних плит. Ввідомо, що теплоізоляційний цементний перлітобетон в порівнянні з теплоізоляційним газобетоном має покращені фізико-технічні властивості (зменшену теплопровідність, відкриту пористість, усадку при висиханні, анізотропію міцності, підвищену міцність при стиску та однорідність середньої густини, регульова- ну сорбційну вологість), що дозволяє ефективно застосовувати його як теплоізоляційний шар огороджувальних конструкцій.
Аналіз плину цементно-піщаного розчину при віброекструзійному способі виготовлення фібробетонних виробів
Authors: Andreev I.A. , Smirnova К.O. 
Published: April 2018

Запропонований метод опису ізотермічного ламінарного усталеного плину нестисливої ньютонівської рідини у збіжних пірамідальних каналах квадратного поперечного перерізу, який дозволяє здійснювати розрахунки дозатора-живильника розчину віброекструзійної установки.
Для вдосконалення формування тонкого шару розчину були запропоновані конструкції дозаторів-живильни- ків, які виключають утворення застійних зон і забезпечують отримання джгутів цементно-піщаного розчину зі стабільними формою і якістю. Подача розчину на транспортер при цьому здійснюється через квадратні у попе- речному перерізі збіжні канали. Аналітичних формул для опису плину у таких каналах не існує.
Molecular Biology of Chili Pepper Anthocyanin Biosynthesis
Authors: Aza-González César , Núñez-Palenius Héctor Gordon , Ochoa-Alejo Neftalí 
Published: April 2018

Chili pepper (Capsicum spp.) is an important horticultural crop worldwide. Chili pepper fruits from different Capsicum species have been highly consumed in Mexico since pre-Columbian times. Some Capsicum species synthesize and accumulate anthocyanins in different tissues and organs. Although the anthocyanin biosynthetic pathway has been established for different plant species, very few studies on anthocyanin chemistry, biochemistry and molecular biology of these pigments produced by chili peppers have been reported. In this review we describe the information on the type of anthocyanins synthesized and accumulated in chili pepper, and also on the molecular biology of the biosynthetic pathway. Additionally, we discuss the applications of current knowledge for the genetic manipulation, through genetic engineering, of this trait, and also the future anthocyanin-related research areas in Capsicum.
Cyclic C-F-Metal Containig Species. Solid State and Computational Examples
Authors: Arroyo Carranza Maribel , Torrens Miquel Hugo 
Published: April 2018

This article examines the results of research published between 2000 and 2012, which found experimental evidence of cyclic species containing the fragment carbon-fluorine-transition metal. 25 Examples (numbered throughout this paper) with 20 different metals and a wide variety of chemical environments have been gathered. A similar analysis brings together almost 40 transitional states and intermediates resulting from theoretical work studying the transition metal mediated carbon-fluorine bond activation. Among other aspects, this review is useful to recognize the specific characteristics which determine whether the C-F activation process is carried out through a concerted process, a mechanism assisted by auxiliary ligands or by free radicals.
NMR and Theoretical Studies on the Conformational Preferences of Some Non-metal Coordinated N-Enoyl Systems Attached to Common Chiral Auxilaries
Authors: Morales-Nava Rosmarbel , Ramírez-Solís Alejandro , Fernández-Zertuche Mario 
Published: April 2018

We report a systematic study of a series of N-enoyl systems attached to common oxazolidin-2-ones, oxazolidine-2-thiones and thiazolidine-2-thiones chiral auxiliaries in order to determine the most stable conformation of these compounds. 1H NMR studies show an anti-s-cis structure as the most stable conformation for these series of compounds. Density Functional Theory geometry optimizations and vibrational analysis using the b3lyp exchange-correlation functional with the standard 6-31g** basis sets were done, including solvent effects (chloroform and toluene). Gibbs free energy differences show that the anti-s-cis structures are the most stable conformers lying, on average, ca. 6 kcal/mol lower in energy than the syn-s-cis conformers, widely used to explain the structure and reactivity of N-enoyl systems.
Plackett-Burman Factorial Design for the Optimization of a Spectrophotometric Flow Injection Method for Phenol Determination in Tap and Bottled Water Using 4-Aminoantipyrine
Authors: Carrillo-Cedillo E. G. , Haro-Vázquez M. P. , Díaz Trujillo G. C. , Cañizares-Macías M. P. 
Published: April 2018

Plackett-Burman and Quarter fraction 25-2 factorial designs were applied to evaluate a spectrophotometric flow injection method in order to determine phenol in water by using 4-aminoantipyrine (4-aap) as derivatizing reagent. With a minimum number of experiments, the designs enabled the best conditions for phenol analysis: 80 cm and 180 cm reactors; flow-rates being: NH3 1.0 mL min-1; 4-aap 0.35 mL min-1 and K3[Fe(CN)6] 0.35 mL min-1, [NH3] 0.064 mol L-1, [4-aap] 9.84 × 10−3 mol L-1, [K3[Fe(CN)6]] 0.02 mol L-1, and an injection volume of 200 μL. With the optimized method it was possible to increase the lineal range from 0.3 μg mL-1 to 30 μg mL-1 and also to quantify the maximum allowable phenol concentration in water in comparison with other standard and flow injection methods whose lineal range are from 0.5 μg mL-1 to 20 μg mL-1 and from 0.5 μg mL-1 to 16 μg mL-1, respectively. The detection limit was of 0.13 μg mL-1 and the regression coefficient was of 0.9999, making possible a throughput of 36 determinations an hour with a minimum consume of reagent. With the proposed method, a distillation step was not necessary to remove sulfates but, when the sulfate:phenol ratio was higher than 83, the analytical signal for phenol increased 8%, but hypochlorite interfered with the signal when the ypochlorite:phenol ratio was higher than 1.
Synthesis, Chemical Structure Elucidation and Biological Studies on the Effect of Some Vital Metal Ions on Lisinopril
Authors: Zaky M. , El-Sayed Mohamed Y. , El-Megharbel Samy M. , Abo Taleb Sameh , Refat Moamen S. 
Published: April 2018

Complexes of lisinopril as a pharmaceutical ligand with Ca(II), Mg(II), Zn(II), Fe(III) and VO(II), were synthesized and characterized by microanalysis, conductance, infrared and thermogravimetric (TGA/DTG and DTA) measurements. The lisinopril ligand acts as a monodentate feature via one carboxylate oxygen atom. Lisinopril and their complexes have been checked against some kinds of bacteria and fungi which gave a significant effect. The kinetic thermodynamic parameters such as: activation of E*, ΔH*, ΔS* and ΔG* were estimated using Coats and Redfern as well as Horowitz-Metzger equations.
A Green Approach to the Production of 2-pyridone Derivatives Promoted by Infrared Irradiation
Authors: Hernández Fernando , De la Cruz Fabiola , López Julio , Peña Eduardo , Delgado Francisco , Alcaraz Yolanda , Robles Juvencio , Martínez-Alfaro Minerva , Vázquez Miguel A. 
Published: April 2018

An alternative is presented for promoting a reaction with infrared irradiation to obtain different 4-aryl-3-cyano-5-ethoxycarbonyl-6-methyl-2-pyridone derivatives 9a-k. The process was carried out with a green approach from the corresponding 4H-pyrans, using mild reaction conditions and infrared irradiation as the energy source. In the first stage, the reaction produced 1,2,3,4-tetrahydropyridin-2-one derivatives 8a-k, followed by an oxidative step to afford the target molecules in good yields. The structure of products 9a-k was confirmed by FT-IR, 1H NMR and 13C NMR spectroscopic techniques and X-ray diffraction. It was found that the efficiency of the reaction depends on the catalyst and the solvent, as well as on the aldehyde substituents.
Eremophilanes and Pyrrolizidine Alkaloids of Senecioneae Species
Authors: Pérez-Castorena Ana L. , Arciniegas Amira , Villaseñor José Luis , Romo de Vivar Alfonso 
Published: April 2018

The chemical study of two species of the tribe Senecioneae afforded two eremophilanes and two pyrrolizidine alkaloids from Senecio subauriculatus and four modified eremophilanes from Roldana oaxacana. The chemistry of these species is in accord with that reported for species of Senecio and Roldana studied so far, and therefore, with the already described for the tribe Senecioneae.
Electrochemical Behavior of Metamitron Herbicide at the Interface of Two Immiscible Electrolyte Solutions
Authors: Reyes-Reyes Alma Gricel , Amador-Hernández Judith , Velázquez-Manzanares Miguel 
Published: April 2018

The electrochemical behavior of the metamitron herbicide at the water|1,2-dichloroethane interface was studied by means of cyclic voltammetry and Electrochemical Impedance Spectroscopy. The results show that metamitron extraction across the interface was pH dependent. The curves capacitance-potential shown that the presence of a lipid monolayer inhibits the metamitrone transport across the interface. In this paper the equilibrium partition of metamitron across the interface of two immiscible electrolyte solutions is discussed.
Electrochemical Hydrogen Peroxide Production in Acidic Medium Using a Tubular Photo-reactor: Application in Advanced Oxidation Processes
Authors: Peralta-Hernández Juan M. , Godínez Luis A. 
Published: April 2018

This paper describes the results obtained in the design and characterization of a tubular electrochemical reactor. The set-up was employed for on-site hydrogen peroxide (H2O2) production in an acidic medium (pH 3) to promote three electrochemical advanced oxidation processes (EAOP): electro-Fenton (EF), photoelectro-Fenton (PEF) and photocatalysis treatment (PT). These processes were evaluated by their abilities to degrade a commercial dye, Orange-II (OGII), in solution using total organic carbon (TOC) removal and high performance liquid chromatography (HPLC). To have free solutions of iron in the EF and PEF systems, a NafionTM membrane with dispersed iron was prepared. For use in photocatalysis, electrodes with a large superficial area were prepared by coating carbon cloth fiber supports with titanium dioxide (TiO2) using the electrophoretic (EP) method. In this work, wastewater samples with a large number of microorganisms (coliform bacteria) were treated with this new reactor design.
Biodiesel synthesis from Pongamia Pinnata oil over modified CeO2 catalysts
Authors: Zaheeruddin Mohamed Shamshuddin Sathgatta , -- Venkatesh , Shyamsundar Manjunatha , Thammannigowda Vasanth Vanagoor 
Published: April 2018

This study investigates the use of CeO2, ZrO2, MgO and CeO2-ZrO2, CeO2-MgO, CeO2-ZrO2-MgO mixed oxides as solid base catalysts for the transesterification of Pongamia Pinnata oil with methanol to produce biodiesel. SO42-/CeO2 and SO42-/CeO2-ZrO2 were also prepared and used as solid acid catalysts for esterification of Pongamia pinnata oil (P-oil) to reduce the % of free fatty acid (FFA) in P-oil. These oxide catalysts were prepared by an incipient wetness impregnation method and characterized by techniques such as NH3-TPD for surface acidity, CO2-TPD for surface basicity and powder X-ray diffraction for crystalinity. The effect of nature of the catalyst, methanol to P-oil molar ratio and reaction time in esterification as well as in transesterification was investigated. The catalytic materials were reactivated & reused for five reaction cycles and the results showed that the ceria based catalysts have reasonably good reusability both in esterification and transesterification reaction. The test results also revealed that the CeO2-ZrO2 modified with MgO could have potential for use in the large scale biodiesel production.
Chemical Composition and Antibacterial Activity of Essential Oils Extracted from Plants Cultivated in Mexico
Authors: Chauvin Anne-Laure , Rodríguez Flores Crecencio , Pennec Alizé , Nugier-Chauvin Caroline , Daniellou Richard , Herrera-Estrella Luis 
Published: April 2018

Samples of lavender, rosemary and laurel essential oils obtained from plants cultivated in Mexico were analysed by GC-MS using a non polar capillary column. Characterisation of individual components was performed using a commercial mass spectrometry library, and 53 components were identified. The analysis of bioactive compounds highlighted a 5 and 2-fold increased quantity of potent antibacterial 1,8-cineole (46.5%) and camphor (12.3%) in lavandin “provence”, compared to the French cultivars. It also showed a 3- and 2-fold increase in camphor and linalool concentration in rosemary and laurel compared to the average level, making them promising alternatives for medicinal treatment. Strains of Gram-positive and Gram-negative bacteria were analyzed for their susceptibility to these essential oils using the agar disc diffusion method and their antimicrobial activity was demonstrated. To our knowledge, this is the first report on antibacterial activity of lavender essential oil, recently added to the Mexican pharmacopeia, against Mycobacterium smegmatis (Mc Rv 3782 PW2).
Molybdenum Oxide Supported on Silica (MoO /SiO ): An Efficient and Reusable Catalyst for the Synthesis of 1,8-dioxodecahydroacridines Under Solvent-free Conditions
Authors: Khojastehnezhad Amir 
Published: April 2018

Silica supported molybdenum oxide (MoO3/SiO2) was found to be an efficient, eco-friendly and heterogeneous catalyst for the multicomponent reaction of aromatic aldehydes, dimedone and ammonium acetate or aromatic amines under solvent-free conditions to afford the corresponding 1,8-dioxodecahydroacridines in high yields. The catalyst can be easily recovered and reused for several times without considerable loss of activity. Furthermore, the present method offers several advantages, such as an easy experimental and work-up procedures, short reaction times and good to excellent yields.
Penggunaan Metode Pembelajaran Peta Konsep (Mind Map) untuk Meningkatkan Hasil Belajar IPA Siswa Kelas VIII-B SMP Negeri 1 Ngimbang Semester I Tahun Pelajaran 2016-2017
Authors: Pujiati Wiwik 
Published: April 2018

Permasalahan yang ingin dikaji dalam penelitian ini adalah apakah penggunaan media peta konsep dapat meningkatkan hasil belajar IPA siswa kelas VIII-B SMP Negeri 1 Ngimbang semester I tahun pelajaran 2016-2017. Berdasarkan permasalahan tersebut, maka tujuan penelitian tindakan ini adalah untuk mengetahui apakah penggunaan media peta konsep dapat meningkatkan hasil belajar IPA siswa kelas VIII-B SMP Negeri 1 Ngimbang semester I tahun pelajaran 2016-2017. Sasaran penelitian ini adalah semua siswa VIII B SMP Negeri 1 Ngimbang semester I tahun pelajaran 2016- 2017 yang berjumlah 34 siswa. Penelitian ini menggunakan penelitian tindakan (action research) sebanyak tiga siklus. Setiap siklus terdiri dari empat tahap yaitu: rancangan, kegiatan dan pengamatan, refleksi, dan revisi. Penelitian ini menghasilkan simpulan bahwa penggunaan media peta konsep dapat meningkatkan hasil belajar IPA siswa kelas VIII-B SMP Negeri 1 Ngimbang semester I tahun pelajaran 2016-2017.Keywords: Metode Peta Konsep (Mind Map)
Sistem Informasi Data Kriteria Rakyat Miskin Desa Liang Ilir Kecamatan Kota Bangun
Authors: Jainuddin Jainuddin , Agus Fahrul , Astuti Indah Fitri 
Published: April 2018

Perkembangan Tingkat Kemiskinan di Kalimantan Timur, Pada Juli 2016 sampai Desember 2016 mengalami penurunan, jumlah penduduk miskin di Kalimantan Timur pada Desember 2016 sebesar 252,68 ribu (6,31 persen). Dibandingkan dengan penduduk miskin pada Juli 2016 sebesar 253,60 ribu orang (6,42 persen), berarti jumlah penduduk miskin berkurang sebanyak 0,92 ribu orang (0,11 persen). Penelitian ini bertujuan untuk membangun sistem manajemen data kriteria kemiskinan yang sumber datanya berasal dari pemerintah desa Liang Ilir dan Menghasilkan data keluarga miskin yang ideal dan tepat sasaran dalam membantu pemerintah daerah dalam program penanggulangan kemiskinan. Sistem ini dibuat dengan menggunakan conteks diagram, DFD desain dan database ERD. Sistem Informasi data Kriteria Rakyat miskin ini dirancang untuk melihat bagaimana sistem yang dibangun tersebut bekerja secara nyata, Implementasi rancangan perangkat lunak yang dibuat menggunakan database MySQL sumber data bersumber dari instansi pemerintah yang mengeluarkan kriteria kemiskinan diantaranya data BPS, BKKBN, BKKBN, serta jurnal dalam acuan penelitian, Sistem informasi data kreteria rakyat miskin telah menghasilkan data keluarga miskin yang ideal dan tepat sasaran yang bisa menjadi acuan pemerintah Desa Liang Ilir Kecamatan Kota Bangun, dalam memetakan kondisi rakyat kurang mampu.
Enhancing Vocabulary Acquisition Through Reading: A Hierarchy of Text-Related Exercise Types
Authors: Paribakht T. Sima , Wesche Marjorie 
Published: April 2018

This paper presents a classification scheme for readingrelated vocabulary exercise types currently advocated in ESL/EFL textbooks. The scheme was developed within the context of an ongoing research project on L2 vocabulary acquisition through reading. The classification scheme proposes a hierarchy of the degree and type of mental processing required by various kinds of vocabulary exercises, in accordance with an information processing framework for the acquisition of L2 knowledge from input (Gass, 1988). It reflects a view of initial vocabulary acquisition as a rnultistage, iterative process involving repeated exposures to new words in meaningful contexts. The categories of the classification scheme are: selective attention, recognition, manipulation, interpretation, and production. The theoretical rationale for the classification scheme will be presented together with illustrative examples. Evidence for the validity of sample exercises will then be discussed. Finally.. implications for vocabulary research and teaching will be considered.