bluuebunny/crossref_metadata_2025 huggingface dataset:
Chemistry and Art
Authors: Lipscher Juraj
Published: March 2018

This review summarizes possibilities of including scientific methods for investigation of art objects into the secondary school chemistry curriculum. We discuss methods such as X-ray radiography, infrared reflectography, neutron activation autoradiography, X-ray fluorescence, and Raman
spectroscopy and provide recent examples of their use. The results obtained, especially when combined with modern digital image processing algorithms, are indeed impressive. The second part of the paper is devoted to suggestions for actual use in teaching. The activities in the classroom can
be centered around scientific investigation of a single painting, properties and use of a single pigment, or utilizing parallels in the history of Chemistry and history of Art. Finally, scientific methods for detecting art fraud including actual historical examples are especially motivating
for the students and various teaching activities can be designed around this aspect.
TEDD Annual Meeting with 3D Bioprinting Workshop
Authors: Raghunath Michael , Rimann Markus , Kopanska Katarzyna S. , Laternser Sandra
Published: March 2018

Bioprinting is the technology of choice for realizing functional tissues such as vascular system, muscle, cartilage and bone. In the future, bioprinting will influence the way we engineer tissues and bring it to a new level of physiological relevance. That was the topic of the 2017
TEDD Annual Meeting at ZHAW Waedenswil on 8th and 9th November. In an exciting workshop, the two companies regenHU Ltd. and CELLINK gave us an insight into highly topical applications and collaborations in this domain.
Los distintos tipos de saberes en las escuelas: su relevancia en la formación de sujetos
Authors: Fortoul Ollivier María Bertha
Published: March 2018

Este texto parte de la gran demanda social a la educación formal en pos de la formación integral de todos los educandos, misma que solamente se atenderá si las escuelas se abren intencionalmente al desarrollo de otros ámbitos, yendo más allá de lo cognitivo. Nos acerca al vínculo indiscutible entre finalidades y contenidos en las escuelas de educación básica y por ende a los saberes y sus categorizaciones.El artículo está organizado en cuatro grandes bloques, que desde una lógica deductiva en los tres primeros y comparativa en el último, analiza la necesidad de distintos tipos de saberes en los procesos de enseñanza y aprendizaje como elemento constitutivo para concretar finalidades de formación de sujetos en las escuelas de educación básica. Se termina presentando la bibliografía.
O REGIME JURÍDICO DAS EMPRESAS ESTATAIS SOB A ÓTICA DA LEI N.13.303/2016: ASPECTOS GERAIS, ESPECÍFICOS E POLÊMICOS
Authors: Pereira Gabriel Senra da Cunha , Faria Edimur Ferreira
Published: March 2018

Este trabalho tem por objetivo identificar o regime jurídico estabelecido pela Lei n. 13.303, de 30.06.2016. Primeiramente se fará breve histórico da evolução normativa relacionada às empresas estatais. Em seguida, examinar-se-á a abrangência da lei em referência. O exame do regime jurídico aplicável será feito a partir da análise dos dispositivos que tratam da responsabilidade civil dos controladores, dos critérios para nomeação de diretores e membros do Conselho de Administração, e dos contratos relacionados às atividades-fim e atividades-meio das empresas estatais. A metodologia da pesquisa consistirá na consulta bibliográfica, jurisprudencial e à legislação que abrange o tema.
Hepatitis A outbreak since November 2016 affecting men who have sex with men (MSM) in Chile connected to the current outbreak in MSM in Europe, situation up to October 2017
Authors: Rivas Violeta , Barrera Aldo , Pino Karla , Núñez Ruth , Caceres C. Joaquin , Lopez-Lastra Marcelo , Soza Alejandro
Published: March 2018

A hepatitis A outbreak has occurred in Chile since November 2016. Men are predominantly affected, with a large proportion of men who have sex with men (MSM). We describe 12 consecutive unrelated confirmed cases who presented at our healthcare institution in Santiago Metropolitan Area. Nine were men, all reporting having had sex with men. Ten viral sequences, genotyped as IA, clustered with the V16–25801 strain causing outbreaks mostly in MSM in Europe since mid-2016.
Presurgical Aspects of Nutrition in Tuberculous Spondylitis Patients
Authors: Yudoyono Farid , Dahlan Rully H. , Arifin Muhammad Z. , Adam Achmad
Published: March 2018

Tuberculous spondylitis is a chronic infectious disease caused by Mycobacteriumtuberculosis on the vertebral bone. Involved less than 3% of all cases of TB, but the incidencevaries around the world, and is associated with the quality of public health and socioeconomicconditions.The purpose of this study is to investigate the presurgical aspects of nutrition inpatients with tuberculous spondylitis. A total of 39 consecutive patients between January 2011-December 2012 were evaluated retrospectively. All patients diagnosed with spondylitistuberculousis and treated with decompression, stabilization and fusion. All patients had beendiagnosed with Spondylitis tuberculousis based on history taking, physical examination,laboratory finding and MRI. Our study showed that of all subjects, ten male patients and eightfemale patients had cervical (n=1), thoracic (n=15), and lumbar (n=2) tuberculousspondylitis.The average age of the patients was 32.83 ± 12.25 (17-56) years old. The averagepreoperative body mass index (BMI) was 16.67 ± 1.2 kg / m2, albumin levels 3.23 ± 0.21 g / dl,total protein level 6.2 ± 0.34 g/dL. These were lower than normal value. We conclude thattuberculous spondylitis patients experience nutritional deficiencies presurgically andnutritional support should be considered pre-operatively.Keywords: Mycobacterium tuberculosis, nutritional state, presurgical aspect,tuberculousspondylitis
Fungi Identification in Preservative Liquids of Cadaver at Anatomy Laboratory of Faculty of Medicine Maranatha Christian University Bandung
Authors: Herdiman Mochamad H. , Winata Triswaty , Pramesti Tediany , Alam Imam G.
Published: March 2018

Cadaver is an important learning media for students of the Faculty of Medicine. Althoughthe cadaver has undergone a preservation process, sometimes the preservative liquids used onlyprotects the cadaver, and does not inhibit the fungal growth. Based on previous research, thefungus found in cadaveric preparations are pathogenic. The objectives of this study were toidentify the growing fungus on the cadaver preservative liquid at the Anatomy Laboratory of theFaculty of Medicine, Maranatha Christian University. This is a descriptive experimental study.Samples were taken from three cadaver tubs. Subsequently, the sample was inoculated onSabouraud's Dextrose Agar and Chromagar medium in a petridish and incubated at roomtemperature (25 ⁰ ) for seven days. After seven days, the morphology of the fungus was observedmacroscopically and microscopically. We found Aspergillus sp., Penicillium sp.,Epidermophyton sp., and Candida sp on the samples. The study was conducted in December2017-January 2018 at the Microbiology Laboratory, Faculty of Medicine, Maranatha ChristianUniversity and Microbiology Laboratory, Faculty of Medicine, Padjadjaran University.Keywords: fungi, cadaver, preservative liquid
The Influence of Students’ Knowledge and Attitude toward Functional Foods Consumption Behavior
Authors: Afina Siti , Retnaningsih Retnaningsih
Published: March 2018

This research was to analyze the influence of students’ knowledge and attitude toward functional foods consumption behavior. This research used cross sectional study design and was conducted at Institut Pertanian Bogor, Dramaga. Samples in this research were 204 students of Institut Pertanian Bogor chosen using simple random sampling method. Data were collected by self-administered technique using questionnaires. The results showed that the average of functional foods consumption frequency was 47 times a month and the number of types consumed was seven. The results of Pearson correlation test showed that students’ allowance, attitudes, and frequency of functional foods consumption was significantly positively correlated. Factors that have significant positive effect toward consumption frequency are allowance and students’ attitude. The number of functional foods types consumed was influenced by students’ attitude.

 
DESAIN NOSEL ROKET CAIR RCX250 MENGGUNAKAN METODE PARABOLIK DENGAN MODIFIKASI SUDUT EKSPANSI
Authors: Priamadi Eko , Nur Hakim Arif , Bura Romie O.
Published: March 2018

The present research is conducted to design the optimum nozzles for RCX250 engine, that is designed to produce maximum thrust of 250 kgf with combination of LOX and Kerosene as its propellant. The new nozzles were determined to be parabolic nozzle, with conical nozzle as its comparison. The parabolic nozzle was designed using Thrust Optimized Parabolic (TOP) method invented by G.V.R.Rao. TOP nozzle design method is performed by approximating a Thrust Optimized Contoured (TOC) Nozzle using parabolic equation. The method would result more efficient nozzle than conical or ideal bell nozzle. Further, the parabolic nozzle were modified in its initial and exit angle to create uniform velocities distribution at nozzle exit. A Computational Fluid Dynamics Method (CFD) is used to simulate the nozzle designs. The simulation was carried out in axis-symmetric condition using commercial CFD software. The simulation results show that MOD 1 nozzle, with initial angle (θN) 26 deg and exit angle (θe) 12 deg, gives maximum thrust, which is 4.67 % higher than reference conical nozzle. Key words:Liquid rocket, Parabolic nozzle, Thrust, CFD
SIMULASI GERAK DAN ANALISIS KESTABILAN KOPLING INERSIA WAHANA DIRGANTARA DENGAN BENTUK BADAN RAMPING
Authors: Muhammad Hari , Samputra Hilman , Jenie Yazdi I. , Sembiring Javensius
Published: March 2018

Inertia coupling is a motion phenomenon of a high-speed airplane having slender body and low aspect ratio. This inertia coupling happens when the aircraft performs a roll manoeuvre motion with a high roll rate. This paper will discuss the derivation of inertia coupling equations of motion, modelling equations of motion in the Matlab/Simulink software, simulating the dynamics motion, and analyzing the stability of the inertia coupling. Numerical simulation and stability analysis of the inertia coupling for a fighter aircraft will be presented in this paper. Keywords:Inertia coupling, Stability analysis, Flight simulation, Slender body
SIMULASI PENGGUNAAN DIFFUSER PADA TURBIN ANGIN SUMBU HORISONTAL UNTUK KENAIKAN DAYA
Authors: Atmadi Sulistyo , Fitroh Ahmad Jamaludin
Published: March 2018

One technique to improve the power output of a wind turbine is by implementing a diffuser, which is called the diffuser augmented wind turbine (DAWT). The area ratio between the inlet and outlet of the diffuser increases the flow rate inside the diffuser which in effect produces higher output power. In this research, a 2 meters rotor diameter was used. Diffuser diameter ratio variation of 2, 3, 4, and 5 were chosen which provides inlet diameter of 4, 6, 8, and 10 meter respectively. Power rotor coefficient is assumed to be constant of 0.30. Air speed distribution inside the diffuser is calculated using CFD method. The inlet speed to the diffuser is varied to give 4 different speeds. The wind angle at the inlet is also varied at 0º, 30º and 60º. The simulation result showed that at 0 degree angle, diffuser diameter ratio variation of 2, 3, 4, and 5 will increase the power output about 58, 622, 3169, and 11519 times respectively. It also showed that the increase in the output power for diameter diffuser ratio of 2 at 0º and 60º angle is 58 and 4 times respectively. Keywords:Wind turbine, Diffuser, CFD
SIMULASI KINERJA FORWARD ERROR CONTROL CODING UNTUK SATELIT MIKRO PENGINDERAAN JARAK JAUH
Authors: Dwiyanto - , Sugihartono -
Published: March 2018

Micro satellite application for remote sensing in this time has been expanded and particularly supported by growth of electronics component that low power and small size. Large amount of image data, less of contact time and limited satellite’s power obliges of efficiency mechanism design to assured data satellite communication is accepted properly by earth station. Various of scenario of data transmissions on micro satellite have been developed in order to ensure all data that taken by payload can be delivered and accepted by station earth truly. Forward Error Control Coding or Forward Error Correction method is mechanism that added redundancy bit to delivery data with a purpose to improve error correction of received data. FEC performance can be known by compare of different value of Eb/N0 needed for Bit Error Rate (BER) in common without FEC. In this research conducted simulation performance FEC Reed Solomon by undertaking change of beet amount per symbol, code length and code ability in repairing symbol error. Simulation Result shows getting smaller code rate that used then ever greater code reinforcement. The simulation using forward error control coding Reed Solomon for data transmission remote sensing results code RS(255,223) have best performance with coderate 0,874 and coding gain 3,4dB on value of BER 10-4. Keywords: Reed Solomon, QPSK, 16-QAM, Remote sensing
PERHITUNGAN DAN ANALISIS LOSSES, DIAMETER EFEKTIF ROTOR, DAN PENYERAPAN DAYA DAN ENERGI PADA DIFFUSER AUGMENTED WIND TURBINE (DAWT)
Authors: Atmadi Sulistyo , Fitroh Ahmad Jamaludin
Published: March 2018

The use of diffuser in wind turbine (DAWT) is aimed at increasing the effective speed to produce a higher power. A bigger and heavier turbine results in difficulty in manufacturing the turbine orientation system. This research consists of three parts i.e. the calculation and analysis of the losses, determination of the effective diameter of the rotor, and the calculation and analysis of the absorbed energy by DAWT. The losses calculation and analysis is based on the friction between the airflow and wall. The diameter of the rotor is choosen in the diffuser area which has minimum turbulence flow produced by the wind angle. The calculation and analysis of the power is based on its rotor diameter. Then the power converted to become energy. In this research, DAWT is assumed to have no orientation system so that easily manufactured, i.e. the rotor is oriented at a single direction. Wind direction and frequency is selected in three configurations. In the first configuration, the wind direction comes from all the twelve wind source direction with the same frequency in the 24 hour period, producing 2 hourly periods for every wind direction. In the second configuration, wind from 90° and 270° or perpendicular to the axial turbine axes are eliminated, and hence producing 10 different wind directions at 2.4 hourly periods. In the third configuration, the turbine is set at the beach whereby the wind direction comes only at two direction; the sea and land wind directions. At these conditions, the wind is assumed to come at 0°, 30°, 150°, 180°, 210°, and 330°. The aim of this research is to calculate the energy absorption of the wind rotor, and comparing with those produced without the diffuser system in place. In this research, a 2m rotor diameter and 4m diffuser diameter is selected, power coefficient of 0.3, wind speed of 5m/sec, and these parameters are constant for the 24 period under analysis. The result of the calculation shows that there are losses near wall especially for high wind angle. The rotor diameter have chossen about 1,940 m. The energy absorption of the wind rotor without the diffuser is 6.231 kJ. The energy absorption values for the 1st, 2nd and 3rd configuration with the diffuser produce 54.361, 65.234, and 101.316 kJ respectively. It shows that the use of diffuser in the wind rotor could produce an increase of up to 9 to 16 times in the power absorption of the rotor. Keywords: Wind turbine, DAWT, Electrical energy, Losses
ANALISIS LINTAS TERBANG ROKET MULTI-STAGE RKN200
Authors: Sasongko Rianto. A. , Jenie Yazdi. I. , Poetro Ridanto. E.
Published: March 2018

This paper deals with a trajectory analysis of RKN200 multi-stage rocket system. The implementation of a multi-stage configuration means that a separation process has to be taken within the flight phase. The separation process is basically a transition process from a phase with booster as initial/launch propulsion to that with sustainer as the propulsion for the rest of flight time. RKN200 is a multi-stage rocket developed by LAPAN Indonesia for defence applications. In a multi-stage rocket development process, stage separation becomes a critical phase which should be considered carefully, since this phase will significantly affect the entire flight performance of the rocket. In this paper, the trajectory of RKN200 is analyzed in various cases with separation process included. The separation stage is modeled as a discrete process, i.e. by applying a sudden change on the rocket parameters values at the time of separation. In addition to that, impulsive force and moment which occur as a result of the separation ignition will also introduced into the mathematical model of the rocket dynamics, such that their influence to the rocket flight variables can be counted and computed . The modeling, simulation, and analysis of the flight trajectory are conducted using a simulation software already developed for rocket dynamic and performance analysis. Some simulation results are presented and analyzed to evaluate the RKN200 flight trajectory in some flight settings and conditions, and also to observe the effect of stage separation process on the rocket flight. Keywords: Rocket, Flight trajectory, Stage separation
PENGARUH GANGGUAN LINGKUNGAN ANTARIKSA PADA SISTEM ELEKTRONIK LAPAN-TUBSAT (EFFECT OF SPACE ENVIRONMENT DISTURBANCE IN LAPAN-TUBSAT SATELLITE)
Authors: Najati Nayla
Published: March 2018

LAPAN-TUBSAT has been operated more than five years. During the operation, LAPAN-TUBSAT faces several anomaly. It could be observed by using real time telemetry and long time telemetry. When and where an anomaly appeared can be detected with long time telemetry. Anomaly event on LAPAN-TUBSAT’s PCDH is caused by Single Event Latch-Up (SEL) that happen in scale of weeks.These conditions required LAPAN-TUBSAT operators to take action in order to make LAPAN-TUBSAT back to normal operation. This paper describes statistic of SEL that occur in LAPAN-TUBSAT. Almost 70% of SEL event take place at South Atlantic Anomaly (SAA) and the rest at polar.

Keywords: SEL, LAPAN-TUBSAT, Real time telemetry, Long time telemetry, PCDH
METODE KALIBRASI RADAR TRANSPONDER ROKET MENGGUNAKAN DATA GPS (CALIBRATION METHOD OF RADAR TRANSPONDER FOR ROCKET USING GPS DATA)
Authors: Widada Wahyu
Published: March 2018

This paper discusses the method of calibration of radar transponders for the rocket launch applications using GPS data. Calibration is performed by measuring the distance of two positions with GPS data and used as a reference for the calibration range radar transponder. Transponder is placed on the measured position and the radar transceiver is placed in a position of radar base station. The obtained results shows that the calibration method is very easy to do, reference to a longer distance can improve the accuracy result of the calibration. We obtained a calibration factor value for the radar system used in the experiment is 0.9275..

Keywords: Radar transponder, GPS, Google-earth, Calibration method
IDENTIFIKASI PARAMETER DAN PERANCANGAN SISTEM KENDALI PID UNTUK ANALISIS SIKAP TERBANG UAV [PARAMETER IDENTIFICATION AND DESIGN PID CONTROLLER FOR FLYING ATTITUDE ANALYSIS OF UAV]
Authors: Purwanto Eko Budi , Nasution Syahron Hasbi , Supendi -
Published: March 2018

Based on the state space yield first principle method knowed that characteristic of UAV is static stable. To get the near real condition doing verification of state space model by using the identification system toolbox of Matlab. The yield show that matrix element of state space is different both of them. Furher step is design the PID control system base on new state space, and for improve the performance system used Kalman filter.

Key word: identification system, PID parameter, Kalman filter, Maximum overshoot
VERIFICATION OF SCHRENK METHOD FOR WING LOADING ANALYSIS OF SMALL UNMANNED AIRCRAFT USING NAVIERSTOKES BASED CFD SIMULATION
Authors: Soemaryanto Arifin Rasyadi , Rosid Nurhayyan Halim
Published: March 2018

Prediction of an aerodynamic load acting on a wing or usually called wing loading becomes an important stage for structural analysis. Several methods have been used in estimating the wing loading. Schrenk approximation method is commonly used to achieve the fast estimation of lift distribution along wingspan, but in order to achieve a high level accuracy of aerodynamic prediction, computational fluid dynamics (CFD) with Navier Stokes-based equation can be used. LAPAN Surveillance UAV (LSU series) has been chosen to represent an aerodynamics analysis on generic small unmanned aircraft with twinboom vertical stabilizer configuration. This study was focused to verify the Schrenk approximation method using high accuracy numerical simulation (CFD). The goal of this study was to determine the lift distribution along wingspan and a number of errors between Schrenk approximation and CFD method. In this study, Schrenk approximation result showed similarity with the CFX simulation. So the two results have been verified in analysis of wing loading. ABSTRAKPrediksi dari beban aerodinamika yang terjadi pada sayap menjadi salah satu tahap yang penting dalam analisis struktur perancangan pesawat. Beberapa metode telah digunakan untuk mengestimasi besarnya beban aerodinamika pada sayap. Metode Schrenk umum digunakan untuk estimasi cepat perhitungan besar distribusi gaya angkat di sepanjang sayap. Guna mencapai tingkat akurasi yang tinggi dari prediksi aerodinamika, simulasi Computational Fluid Dynamics (CFD) dengan berbasis persamaan Navier-Stokes dapat digunakan. Pesawat nirawak LSU dipilih untuk merepresentasikan analisis aerodinamika pada pesawat nirawak dengan konfigurasi twin-tailboom pusher. Fokus dari studi yang dilakukan adalah untuk memverifikasi dari metode pendekatan dari Schrenk dengan menggunakan metode yang memiliki akurasi tinggi seperti simulasi CFD. Tujuan dari studi adalah untuk menghitung distribusi gaya angkat sepanjang sayap dan menentukan seberapa besar error dari kedua metode.
Educação química e características de ensino investigativo em escolas públicas da região norte do Brasil
Authors: Rocha Carlos José Trindade da , Malheiro João Manoel da Silva , Altarugio Maisa Helena
Published: March 2018

Este artigo objetiva analisar a formação de professores, no que se refere às abordagens investigativas em aulas de química de escolas de um município do Estado do Pará.  A metodologia utilizada é qualitativa do tipo análise do conteúdo. Os dados foram recolhidos através de questionário com perguntas aplicadas a 18 professores que exercem a docência em química em escolas públicas. Os resultados caracterizam um corpo docente jovem para a educação e ensino, com formação inicial específicas e deoutras áreas, com concepções de ciência e ensino de química que permitem melhorar suas competências e habilidades para potencializarem o ensino investigativo na atuação profissional docente.
Relações com o saber constituídas por estudantes durante visitação em uma feira de ciências
Authors: Francisco Welington , Castro Magda Cardoso de
Published: March 2018

Este trabalho busca identificar quais as relações com o saber constituídas por estudantes-visitantes de uma feira de ciências, a fim de verificar se o evento pode ser considerado um ambiente de saber. Utilizou-se de uma pergunta orientadora para coletar os dados de 235 estudantes-visitantes sendo que as respostas foram organizadas em sete categorias, destacando-se as principais relações com o saber em: relação com o outro, sobretudo na explicação do saber científico pelo monitor; relação com o mundo, encarnada nos saberes científicos presentes nos experimentos; relação consigo mesmo, mobilizada pelo desejo do sujeito em aprender durante a visitação. A partir desses resultados, pode-se verificar que a feira de ciências foi considerada um ambiente de saber por 234 estudantes-visitantes que participaram da pesquisa, corroborando com o potencial das feiras para a aprendizagem.
Processos de desenvolvimento profissional docente: interações e mediações significativas na (re)construção da prática docente no ensino superior de química
Authors: Silva Rejane Maria Ghisolfi da , Schnetzler Roseli Pacheco
Published: March 2018

Este trabalho tem como propósito analisar as experiências formativas no âmbito profissional dos professores de Química que atuam na universidade , que, segundo seus depoimentos, lhes possibilitaram re-significar situações vivenciadas e, fundamentalmente, criar outras formas de intervenção para o enfrentamento dos desafios atuais. Parte do pressuposto de que o campo de atuação profissional é contexto de constituição do sujeito, de seus conhecimentos e formas de ação. O trabalho fundamentou-se no contexto teórico da formação e nos pressupostos de Vygotsky e de seus seguidores, tendo como eixo de análise as significações sociais dos processos formativos na esfera das relações profissionais. A metodologia é qualitativa tendo como objeto de análise os depoimentos de professores universitários. Os resultados permitem reafirmar que a formação é um processo ininterrupto onde a participação do outro têm relevância significativa, em movimento contrário ao da fragmentação, do isolamento e da expropriação de pensamentos e ações.
O uso de indicadores naturais para abordar a experimentação investigativa problematizadora em aulas de Química
Authors: Pereira Ademir Souza , Viturino Jaqueline Pereira , Assis Alice
Published: March 2018

Este trabalho apresenta os resultados de uma intervenção realizada em uma escola da cidade de Dourados/MS, com alunos do primeiro ano do ensino médio, a partir do conteúdo de funções inorgânicas, especificamente a utilização de indicadores naturais de pH.  A atividade teve o caráter qualitativo e foi desenvolvida em uma sequência de etapas mediada pela proposta problematizadora freireana, na qual o professor sustenta o dialogo durante a atividade. Os alunos realizaram inicialmente um experimento motivador e em seguida propuseram a investigação de plantas que poderiam possuir o caráter de um indicador universal. Como resultado, os estudantes demonstraram autonomia em todas as etapas propostas e identificaram possíveis indicadores naturais de pH.
Ensino de química no ensino fundamental: relatos de práticas investigativas nos anos iniciais
Authors: Messeder Jorge Cardoso , Dos Santos Oliveira Denise Ana Augusta
Published: March 2018

Este artigo apresenta os resultados iniciais de um projeto de iniciação científica em desenvolvimento em um curso de Licenciatura em Química. O projeto busca novas abordagens para aulas de ciências/química destinadas a alunos dos anos iniciais do Ensino Fundamental.  O objetivo é promover discussões sobre o uso de diversos recursos didáticos e metodológicos no que diz respeito à abordagem de conceitos químicos presentes no cotidiano das crianças. Os dados obtidos evidenciam a importância em aproximá-las desde seus primeiros anos de escolarização à atividade de investigação sobre os fenômenos químicos observados em seu cotidiano, de modo que a construção de conceitos ocorra de maneira significativa e contextualizada.
Ensino de ciências e cultura negra: estudos sobre a mobilização de saberes docentes
Authors: Souza Ellen Pereira Lopes , Arantes Caio Martins , Bastos Morgana Abranches , Benite Anna Maria Canavarro
Published: March 2018

A promulgação da lei 10 639/2003, que torna obrigatória a inserção de conteúdos de história e cultura afro-brasileira e africana nos currículos da escola básica, é fruto de lutas históricas do Movimento Negro Brasileiro e tem sido um instrumento para o reposicionamento do negro na educação na tentativa da valorização de sua identidade. Neste contexto, visamos apresentar uma discussão sobre os desdobramentos da lei para o ensino de ciências e matemática, trazendo reflexões no sentido de compreender a proposta de implementação da lei, a origem histórica da sociedade brasileira e oportunizando acesso para futuras análises referentes à temática. Trata-se de uma investigação que apresenta elementos de uma pesquisa-ação e se interessa pela mobilização de saberes docentes a respeito da lei 10.639, produzidos pela tríade de professores de ciências e matemática (professor formador, professor em formação inicial e professor do ensino básico em formação continuada)[1].[1]                            O presente trabalho é baseado na dissertação de mestrado de Autores, 2014.
Efficacy of enrofloxacin against transmissible resistance gene (qnrS and aac (6’)-Ib-cr) - containing Escherichia coli isolates and clones
Authors: CENGİZ Murat , ARSLAN Erdem
Published: March 2018

Aim of this study was to investigate the effects of qnrS1 and aac (6’)-Ib-cr on susceptibility, some pharmacodynamics of enrofloxacin against molecularly constructed and natural isolates of E. coli from animals. The MPCs and mutation frequencies of the drug were determined using the agar dilution method. Time-kill assays were used to determine the antimicrobial activity of the drug against E. coli strains. MPCs of enrofloxacin for qnrS1- and aac(6´)-Ib-cr-containing transformants increased from 0.128 µg/ml to 2 and 4 µg/ml. MPC:MIC ratio of enrofloxacin for transformants and E. coli isolates were 4 and 8, respectively. Mutation frequencies were markedly higher for transformants and isolates compared to control strain. Mutation frequencies diminished up to 6.2x10-18 by increasing the concentrations used in the assay. The results of this study showed that enrofloxacin is less active against E. coli strains in case of additional mutations in QRDR. The concentration-dependent bactericidal effect of enrofloxacin is only observable by the eight times the MIC and increasing concentrations did not alter the bactericidal activity. The combination therapy can be considered to fight with resistant E. coli instead of monotherapy and artificially constructed E. coli strains, which exhibit similar reactions against ENR with natural E. coli isolates, can be used to test the pharmacological efficacy of the combinations.
Normotensive HELLP syndrome in the midst of Dengue fever
Authors: Manappallil Robin George , Surendran Sithara , Kumar Anoop , Prasad Ganga
Published: March 2018

HELLP syndrome is a life threatening complication of pregnancy, characterized by haemolysis, elevated liver enzymes and low platelet counts. Preeclampsia is a risk factor for developing HELLP. However, some patients can have HELLP in the absence of elevated blood pressure. Dengue fever is a mosquito-borne viral infection characterized by fever, leucopenia and thrombocytopenia, and bleeding manifestations. This is a case of a young primigravida who presented with dengue fever and was found to have an associated normotensive HELLP syndrome.Asian Journal of Medical Sciences Vol.9(2) 2018 40-42
Kinetics and Mechanism of Counterionic Salt-Catalysed Piperidinolysis of Anionic Phenyl Salicylate in the Presence of Cationic–Nonionic Mixed Micelles
Authors: Fagge Ibrahim I. , Ahmad W. Hamdah W. , Md Zain Sharifuddin , Khan M. Niyaz
Published: March 2018

The quantitative correlation of counterion-affinity to aqueous hexadecyltrimethylammonium bromide (HDAB, cationic micelles/nanoparticles) and the counterion-induced HDAB micellar growth, in the presence of different amounts of poly(ethylene glycol hexadecyl ether) (C16E20, nonionic surfactant), was achieved by the use of a semi-empirical kinetic (SEK) method. The values of the ratio of cationic HDAB, as well as mixed HDAB–C16E20, micellar binding constants of X and Br, KX/ KBr (= KXBr or RXBr) for X = 4-ClC6H4CO2-, were obtained by the SEK method. The concentration range (0.006–0.015 M) of pure HDAB was found to have no influence on the values of KXBr or RXBr. These observations were also recorded upon addition of a nonionic surfactant, C16E20, in an aqueous solution of HDAB. The mean value of KXBr or RXBr obtained in the presence of pure HDAB ( KXBr or RXBr = 50.3) is 2.3 times larger than that in the presence of mixed HDAB–C16E20 (m KXBr or m RXBr = 21.7). From rheometric measurements of aqueous HDA+/4-ClC6H4CO2- with 0.015 M HDAB, single symmetric maxima (at both 25 and 35 °C) were obtained at [4-ClC6H4CO2Na] = 0.03 M. This is evidence for the existence of wormlike micelles/nanoparticles. However, the absence of a maximum in rheometric data for aqueous HDA+/C16E20/4-ClC6H4CO2- with 0.015 M HDAB and 0.006 M C16E20 at various [4-ClC6H4CO2Na] revealed the existence of spherical micelles.
A Compact Reaction Mechanism of Methane Oxidation at High Pressures
Authors: Zhukov Victor P. , Kong Alan F.
Published: March 2018

A skeletal methane kinetic mechanism is developed for conditions relating to the combustion of undiluted methane–oxygen mixtures at high pressures. The new skeletal mechanism is based on the detailed mechanism of oxidation of alkanes by Zhukov (2009). The skeletal model has been created by eliminating unimportant species and reactions from the detailed mechanism. The reduction technique is based on the reaction path and sensitivity analyses. They allow one to determine the reactions and species that play important roles in combustion in rocket combustion chambers. The skeletal mechanism consists of 23 species and 51 reactions. The final and intermediate versions of the skeletal mechanism are compared with the parent detailed mechanism, with other reduced kinetic models and with experimental data on the ignition of methane at high pressures. This comparison shows that the developed skeletal mechanism has a better performance than other kinetic mechanisms in terms of accuracy and required computational power.
Nuclease Activity of Diaza-Crown Ether Complexes of Cerium(III) with Different Functional Groups as Side Arms
Authors: Jiang Bingying , Cai Shulan , Xie Jiaqing , Feng Fa-Mei
Published: March 2018

Cerium(III) complexes of two ligands of a diaza-crown ether with different functional groups as side arms were synthesised and characterised. The catalytic ability of the cerium(III) complexes for pUC19 DNA cleavage was investigated and compared using agarose gel electrophoresis. The results indicate that the catalytic activity of the complex CeL2 [L2 = 2,2′- (1,4,10,13-tetraoxa-7,16-diazacyclooctadecane-7,16-diyl) diacetamide] with two carbamoylmethyl groups is significantly higher than the complex CeL1 [L1 = 2,2′- (1,4,10,13-tetraoxa-7,16-diazacyclooctadecane-7,16-diyl) diethanol] with two hydroxyethyl groups under the same conditions. The optimum catalytic concentrations of CeL1 and CeL2 were 7.69 × 10−5 and 3.08 × 10−5 mol L−1 respectively and excessively high concentrations of the complexes can reduce their catalytic efficiency due to the formation of inactive μ-hydroxo dimers. The optimum catalytic acidities of CeL1 and CeL2 were pH 7.0 and 7.5 respectively and excessively high pH of the reaction system can reduce the catalytic efficiency of the complexes due to the formation of cerium(III) hydroxide. DNA cleavage promoted by the two complexes takes place via the same hydrolytic pathway and so the activity difference of the two complexes is attributed to the stability of the complexes, rather than the catalytic mechanism.
Unilateral Internuclear Ophthalmoplegia Due to Microvascular Pontine Infarction
Authors: Hossain Sanwar , Guda Titus Leonard , Chowdhury Forhad , Hossain Md Somir
Published: March 2018

Internuclear Ophthalmoplegia (INO) is a clinical syndrome which develops due to a lesion in the medial longitudinal fasciculus (MLF). It is a horizontal gaze disorder characterized by impaired adduction of eye on the side of the lesion of medial longitudinal fasciculus with dissociated nystagmus of the opposite abducting eye. This lesion is mostly caused by multiple sclerosis (usually bilateral lesion), stroke and tumours. A case with unilateral internuclear ophthalmoplegia due to vascular lesion was admitted in Anwer Khan Modern Medical College & Hospital on 27/05/2017.Anwer Khan Modern Medical College Journal Vol. 9, No. 1: Jan 2018, P 71-74
From the Desk of Editor in Chief Vol.9(1)
Authors: Rahman Md Tahminur
Published: March 2018

Abstract not availableAnwer Khan Modern Medical College Journal Vol. 9, No. 1: Jan 2018, P 79
CME
Authors: Rahman Md Tahminur
Published: March 2018

Abstract not availableAnwer Khan Modern Medical College Journal Vol. 9, No. 1: Jan 2018, P 80
Nosocomial infection in a tertiary military hospital in Dhaka
Authors: Amin Zulfiquer Ahmed , Nahar Nazmoon
Published: March 2018

Background: Microbial agents in the hospital environment and other patients increase the morbidity and mortality of the hospitalized patients and cause increase in cost of care, wastage of scarce medical resources prolonged hospitalization and render non availability of scarce hospital beds to the needy.Objective: To find out the prevalence of Nosocomial Infection (NI), its risk factors and pattern of organisms.Method: This descriptive cross sectional study was conducted among the surgical patients of all age and sex at Combined Military Hospital, Dhaka. The study was conducted from 5 April 2014 to 12 April 2015.Results: A total of 360 respondents were available in different surgical wards during data collection period and 30 respondents developed nosocomial infection, thus the prevalence rate was 8.33%. The mean age of the respondents was 36.89 years with standard deviation of (±) 14.54 years. Among the nosocomial infection cases, 53.33% were surgical site infections and 50% were caused by Escherichia coli. The study found that frequency of nosocomial infection was more common among those who required assistance for most activities (40%), who had visitors more than 3 per day (81.3%), who had underlying illness like diabetes mellitus (25%), who had invasive devices (9.5%), who were admitted in ICU (12.9%), who received immunosuppressive therapy (23.5%), who had immunosuppressive conditions (28.1%), who had emergency operation (34.8%), and who had undergone general surgery (19.0%). Findings suggest that association between nosocomial infection and number of visitors, admission in ICU, immunosuppressive conditions, use of immunosuppressive therapy, use of invasive devices, and different functional state of patients were statistically significant (p<0.05).Conclusion: Measures are required for increasing awareness of hospital staffs, formulation of policy on use and duration of use of invasive devices establishing a surveillance system and controlling visitors for effective control of nosocomial infection.Bang Med J (Khulna) 2017; 50 : 8-12
Weight loss in women with hyperemesis gravidarum admitted in a tertiary hospital
Authors: Kabir Shikha , Basher Md Shahidul , Latif Tanzina , Akhter SM Nahida , Nahar Lutfun , Shaon Simla Aftab
Published: March 2018

Background: Hyperemesis gravidarum is the most severe form of nausea and vomiting in pregnancy with poor pregnancy outcome. Hormonal, psychological, immunological, and infection with H. pylori contribute to the condition.Objective: To estimate the weight loss in women with Hyperemesis gravidarum.Methods: A descriptive, cross sectional study was carried out at antenatal ward, Mymensingh Medical College Hospital, Mymensingh for a period of twenty one months among purposively selected thirty-six patients with hyperemesis gravidarum admitted into the hospital.Results: Highest number (16-44.4%) of respondents were in age group 20 to 24 years with a mean of 23.8 ± 4.5 years. Majority 29 (80.6%) of the women had education less than 12 years, whereas as many as 28 (77.8%) women were housewives, and at least 14 (38.9%) women had unplanned pregnancies. An overwhelming majority 29 (80.6%) of women had their pregnancy duration of 8 to 12 weeks with a mean of 10.6 ± 2.4 weeks. Majority 20 (55.6%) of women were pregnant for the first time, while 19 (52.8%) women had duration of illness for 5 to 9 weeks. Mean difference in body weight was 3.9 ± 2.0 Kg. The loss of weight ranged from 3 to 8 kilograms with a mean of 3.9 ± 1.4 Kg. Loss of weight ranged from 5.0 to 16.7 percent with a mean 7.9 ± 2.8 percent. Out of 16 multigravid women, 7 (43.8%) had history of similar condition in their previous pregnancies.Conclusion: First trimester was time of manifestation of the condition. Patient with Hyperemesis gravidarum often presents with vomiting over 10 times a day with dehydration and remarkable loss of body weight.Bang Med J (Khulna) 2017; 50 : 22-25
Role of ultrasound and color Doppler in the evaluation of acute scrotal pain
Authors: Salahuddin Gazi , Nayeem SM Zulker , Hossain Syed Mozammel , Parvin Sadika , Hossain Md Monoar
Published: March 2018

Background: Traditionally acute scrotal pain is evaluated by gray scale ultrasound, which dissipated only the morphological changes of the lesion. But pattern of vascularity either normal, increased or absent of affected structure help to definitive diagnosis of the lesion and help to proceed the type of management either medical therapy or surgical treatment.Objectives: To determine the relative importance of color Doppler in the evaluation of acute scrotal pain by ultrasound.Methods: From June 2013 to June 2017 a total 150 patients with acute scrotal pain were selected. A thorough history taking and physical examination were done. Then patient were scanned with gray scale ultrasound followed by color Doppler study. Color Doppler diagnosis is compared with gray scale diagnosis.Results: In gray scale ultrasonography among the 150 cases, 54% were diagnosed as epididymitis, 16.66% were epididymo-orchitis and 16% patient diagnosed as normal. But in combined gray scale and colour Doppler study 58% were diagnosed as epididymitis, 22% were epididymo-orchitis and 6% of patient diagnosed as normal. In gray scale 10% patient were diagnosed as normal but become epididymitis and epididymo-orchitis in colour Doppler. Four percent were diagnosed as epididymitis in gay scale but became epididymo-orchitis in colour Doppler. Four percent patient was diagnosed as epididymitis orchitis but became testicular torsion in Doppler study. Total 14.66% of gray scale diagnosis became another diagnosis in the Doppler study.Conclusion: Combined gray scale and color Doppler study is superior than gray scale ultrasound in differentiating various cause of acute scrotal pain.Bang Med J (Khulna) 2017; 50 : 26-30
Outcome of meconium ileus in a tertiary care hospital
Authors: Saha Amar Kumar , Biswas Sunil Kumar , Sharif HM Zafor , Islam Md Saiful
Published: March 2018

Background: Meconium ileus is a common form of congenital intestinal obstruction. The condition results from the accumulation of sticky inspissated meconium in distal ileum. In about half the cases, however, the pathologic condition is complicated by volvulus, gangrene, perforation with meconium peritonitis. Relief of the obstruction is commonly accomplished with a variety of operative procedures. A number of operative procedures are in use, including Bishop-Koop enterostomy, Mikulicz ileostomy and primary closureObjective: Aim of this study was to evaluate the outcome of meconium ileus and its complications in two commonly practiced enterostomy procedure.Method: In this retrospective study from July 2007 to Jun 2017, a total of 52 cases of meconium ileus were included. Diagnosis of suspected cases was confirmed after laparotomy. Two commonly practiced ileostomy procedure were Mikulicz ileostomy and Bishop Koop ileostomy in this study. Survivors of all primary enterostomy underwent ileostomy closure after 3-6 months.Result: Mikulicz enterostomy was done in 38 cases and Bishop Koop ileostomy in 14 cases. After primary ileostomy 5 patients died following Mikulicz ileostomy and 2 after Bishop Koop ileostomy Among the 41 cases those who reached ileostomy closure, 35 were survived.Conclusion: Complications were more common after Mikulicz ileostomy and difficult to manage in our observation. Overall survival of meconium ileus was 66% in our study without any facilities of intensive neonatal care.Bang Med J (Khulna) 2017; 50 : 31-34
Acute pancreatitis- a clinical update
Authors: Ahad Md Abdul
Published: March 2018

Acute pancreatitis is an acute inflammatory process of the pancreas that can range from mild interstitial pancreatitis to severe pancreatitis with pancreatic necrosis with variable involvement of regional tissues and remote organ systems. The incidence of pancreatitis varies in different countries and depends on causes e.g, gallstones, alcohol, metabolic factors and viral infections. Gall stones continue to be the leading cause of acute pancreatitis in most series. Alcohol, hypertriglyceridemia and drugs are also a common cause of acute pancreatitis. Gall stone pancreatitis is more common in women than in men. Alcohol is also a common cause of acute pancreatitis. Alcoholic pancreatitis is more common in men, and usually occurs in individuals with long standing alcohol abuse. The increased frequency of acute pancreatitis may be due to the rising incidence of obesity, a risk factor for the development of gallstones and by extension, gallstone pancreatitis. Acute pancreatitis occurs when there is abnormal activation of digestive enzymes within the pancreas. This occurs through inappropriate activation of inactive enzyme precursors called zymogens or proenzymes inside the pancreas, most notably trypsinogen. Acute pancreatitis is typically rapid in onset and most commonly encountered in its mild form. While mild cases are often successfully treated with conservative measures, such as fasting and aggressive intravenous fluid rehydration, severe cases may require admission to the intensive care unit or even surgery to deal with complications of the disease process. Acute pancreatitis may be accompanied by life threatening complications as well as significant morbidity and mortality despite treatment.Bang Med J (Khulna) 2017; 50 : 35-40
Abstract From Current Literature 50(1-2)
Authors: BMA-Khulna Branch -
Published: March 2018

Abstract not availableBang Med J (Khulna) 2017; 50 : 49-52
The Role of Context in Interpreting and Translating the Qur'an
Authors: Haleem M.A.S. Abdel
Published: March 2018

Quoting out of context can become especially serious when dealing with religious texts. As will be demonstrated in this article, attention to context (siyāq) is essential to proper understanding and translation of the Qur'an. However, in much tafsīr writing, and in most of the translations of the Qur'an into English, as well as more general discussion of the Qur'an, we come across examples where insufficient regard to the context seriously mars understanding and results in misrepresentation of the Qur'an's message. The study of context has a central place in rhetoric (balāgha) and in Qur'anic studies in Arabic, but is hardly mentioned in Qur'anic studies undertaken in English.

This article explores the significance of context in reading the Qur'an. In the introduction, I outline the various types of context, and then move on to examine its role in determining the meaning of words and sentences, and in determining the inclusion and omission of material, as well as the order and amount of material used in any given situation in the Qur'an. The discussion will also explore which linguistic features can cause difficulties in determining meaning, and what clues are given in the Qur'an to help identify the context and appropriate meanings of specific passages. Examples will be given from translations of the Qur'an, tafsīr, and Qur'anic studies.