bluuebunny/crossref_metadata_2025 huggingface dataset:
Quantitative Structure-Activity Relationship Study of Curcumin Analogues as Anti-proliferative Agents of Human Prostate Cancer Cell Line (PC-3)
Authors: Reyes Andrea Marie M. , Billones Junie B.
Published: March 2018

A quantitative structure-activity relationship (QSAR) study has been performed on curcumin analogues in order to establish the effect of variation of structural, electronic and topological properties  on  the  anti-proliferative  activity  against  prostate  cancer  cell  line  PC-3.  The structure-based  properties  were  calculated  by  the  use  of  Hyperchem®  and  Dragon® softwares  and  the  multi-linear  regression  equations  were  generated  by  the  use  of  SPSS® software. Six models of PC-3 activity have been developed according to the types of QSAR descriptors.  All  models  were  cross-validated  using  leave-one-out  (LOO)  method.  The models  indicate  that  a  more  potent  curcumin  derivative  against  PC-3  should  have  smaller surface area, greater volume, lower polarizability, and fewer oxygen and multiple bonds.
Seasonal Bioaccumulation of Copper in Guppy, Poecilia reticulata (Peters) with Characterization of the Hydrophobic Fraction of Its Octanol - Water Emulsion
Authors: Cañete Rachelle C. , Villegas Lora Mae G. , Castañares Josephine M.
Published: March 2018

In this study, copper was seasonally determined in water, sediment and guppy fish (Poecilia reticulata) from Butuanon River, which is an important water source for drinking and irrigation in Metro Cebu, using Flame Atomic Absorption Spectroscopy (FAAS).
Electronic Effects in Oxidation Reactions Utilizing Dinuclear Copper Complexes with the Bis[3-(2-hydroxybenzylideneamino)phenyl] Sulfone Ligand
Authors: Guidote Armando, Jr. M. , Reyes Ronald L. , Kashihara Riyo , Kurusu Yasuhiko , Masuyama Yoshiro
Published: March 2018

Please download the paper to view the abstract.
Anti-coagulant Activity of Isolated and Partially Characterized Proteoglycans and Glycosaminoglycans from African Night Crawler (Eudrilus eugeniae Kinberg)
Authors: Bercansil Mia Clare Marie L. , Belgado Miko Lorenzo J.
Published: March 2018

Proteoglycans and glycosaminoglycans were isolated from African night crawler (Eudrilus eugeniae Kinberg) and partially characterized proteoglycans (3.04 % of lyophilized worm) were liberated from the defatted and depurinated worm samples by dissociative method using 4M urea in acetate buffer. Glycosaminoglycans (12.47% of proteoglycan extract) were extracted using enzymatic hydrolysis of the proteoglycan extract with papain. Gel filtration chromatography using Sepharose CL-4B was used to purify and estimate the molecular weights of the proteoglycan and glycosaminoglycan fractions. Three proteoglycan fractions PGF1, PGF2 and PGF3 with estimated molecular weigths 860 kDa, 181 kDa and 3 kDa, respectively were identified as monitored by the Bradford and modified carbazole assay. Two glycosaminoglycan fractions - GF1 (MW = 860 kDa) and GF2 (MW=140 kDa) were identified using the modified carbazole assay. Infrared spectroscopy of the GF1 and GF2 showed the possible identities of the fractions. GF1 may be a hyaluronic acid and GF2 is possibly chondroitin. Anti-coagulant assay for the extracts and fractions revealed that the glycosaminoglycan isolate has anti-coagulant activity but not the GF1 and GF2 fractions individually.
Partial Characterization of Glycans from Daedalea quercina (L) Fr.
Authors: Clerigo Melody M. , Yang Wen Bin , Paano Anamy Ma C.
Published: March 2018

Heteroglycans were extracted and isolated from the fruiting bodies of wild mushroom Daedalea quercina (L) Fr. These were obtained from sequential extraction with hot water, 1% Ammonium oxalate then 5% Sodium hydroxide solution followed by ethanol or acidic precipitation affording crude extracts which were further purified by dialysis membrane (MWCO 12 400).  Separation by charge and size were done using DEAE-cellulose column and Sephadex G-100 or Sepharose CL-4B. This resulted to water soluble neutral (W1P-1A) and acidic (W1P-2A) glycan isolates, ammonium oxalate soluble (A1P-1) and two alkali soluble (N1P-1 and N1P-2) glycan isolates. Characterization of the hydrolyzed isolates using HPAEC-PAD and MALDI TOF MS showed glucan-rich heteroglycans (W1P-1A and W1P-2A); glucan and mannan rich heteroglycan, (N1P-1) and galactan-rich heteroglycan (A1P-1). The latter being the first reported galactan-rich glycan found in ammonium oxalate mushroom extract. The hydrolysates had approximately 4-5 degree of polymerization with molecular weights ranging from 689.680 to 851.788 Da. The hydrolysate of isolate N1P-2 is a glucan-rich heteroglycan which also contain N-acetyl glucosamine units. It is composed of polymers with 4-5 hexose units as well as N-acetyl glucosamine containing polymers of 6-8 hexose units with molecular weight range of 689.799 to 851.915 Da and 1055.718 to 1379.584 Da, respectively.
Chemical Characterization of Historical Brickwork of the Church Convento in Pagsanjan, Laguna
Authors: Cayme Jan-Michael C. , Asor Aniano, Jr. N. , Alano Maveen Kim Alexis T. , Miranda Eric T.
Published: March 2018

This study reports the chemical composition of historical brickworks from Franciscan-built church complexes in the Philippines. An old brick sample from the Spanish colonial period church convento at Pagsanjan, Laguna was characterized by atomic absorption spectroscopy (AAS), infrared spectroscopy (IR), thermogravimetric analysis (TGA), and scanning electron microscopy with energy-dispersive X-ray spectroscopy (SEM-EDX). Conventional hot plate aqua regia (1:3 HNO3:HCl, v/v) digestion method was employed to extract iron, calcium, and magnesium from the brick sample. The combined AAS and EDX results yielded a percentage composition of iron ranging from 5.48 to 6.62%, calcium ranging from 1.50 to 3.72%, while magnesium ranges from 0.083 to 0.12%, respectively. These amounts were compared to a similar AAS and EDX study made on a historical brick sample from Ilocos Norte. The presence of possible pores on the brick’s microstructure was confirmed by SEM. Minerals consisting of hematite, kaolinite, illite, quartz, and calcite were present in the sample, as well as trace amounts of other minerals based on IR peak intensities. Upon heating to about 800⁰C using TGA, the loss of bound water from the sample’s internal surface structure and the decomposition of brick minerals and carbonates are evident.
Mini Review: Oxazolidinone and Other Sialic Acid C5 Modifications Over the Past Decade
Authors: Salmasan Regina
Published: March 2018

The potential of sialic acids as therapeutic agents has gradually been recognized due to its importance in the proper functioning of living systems, and likewise the virulence of several pathogens. However, synthesis of these compounds often result in poor yields and selectivities because of inherent characteristics associated with their structures. Use of various promoters, solvent systems and introduction of auxiliaries has since improved the outlook of chemical sialylation. Of these, attachment of various groups on C5 has notably resulted in improved α-selectivity. This mini review focuses on C5 structural modification of sialic acids over the past decade, most notably the oxazolidinone group protection.
Identification of Glucoamylase cDNA Sequence of Saccharomycopsis (Syn. Endomycopsis) bubodii 2066
Authors: Tolentino Joel H. G. , Labrador Kevin L. , Fronteras Jennifer P. , Bullo Lani L. R. , Cancio Leslie P. M. , Añonuevo Joanne J. J. , Eleria Gabriel P. G. , Novero Annabelle U.
Published: March 2018

Saccharomycopsis (Syn. Endomycopsis) bubodii 2066 is an isolate from bubod, a starter used in making rice wine in northern Philippines. We have shown that the yeast has amylolytic activity on raw sago starch. In our attempt to identify the putative raw starch-digesting amylase in S. bubodii, we determined the cDNA sequence of a glucoamylase gene. One primer pair that was designed based on a glucoamylase of Saccharomycopsis fibuligera HUT7212 (GLU1, NCBI Accession Number L25641.1) produced a sequence of 1234 base pairs. To obtain a wider coverage, a primer walking strategy was carried out using four primer pairs designed based on GLU1 gene. The generated sequence of 1535 base pairs shows 98.7 to 100% homology when aligned with glucoamylase genes from four strains of S. fibuligera suggesting that this glucoamylase is highly conserved between the Saccharomycopsis species. This work further reports a gene sequence of glucoamylase derived from Philippine-isolated yeast. The sequence is deposited in GenBank and assigned the accession number KP068007.1. The gene may be heterologously expressed in Saccharomyces cerevisiae for possible utilization in the direct conversion of raw sago starch to bioethanol.
The Effects of Scientific Reasoning Skills, English Language Proficiency and other Factors on the Acquisition of Chemistry Content Knowledge
Authors: Ybañez Manolito, Jr. G. , Sagayap Charmaine , Camacho Vic Marie I.
Published: March 2018

This paper aims to examine the effects of English Language Proficiency, Scientific Reasoning Skills, and other factors such as primary language at home, subject interests, type of school graduated, family monthly income, and available studying materials on acquisition of Chemistry content knowledge of fifty-four (54) randomly selected pre-service science teachers from a state university. Using One-way Analysis of Variance (ANOVA) and Pearson r formula, the results of this 2-way interaction showed an F ratio of 1.025 with a significance level of 0.445. This finding is significant as it implies that combined high levels of English language proficiency and reasoning skills enhance students’ abilities to learn science content. In addition, a significant main effect for the variable scientific reasoning skills, an F ratio of 0.550 with a significance level of 0.815 show that English Proficiency does not significantly affect the Chemistry Skills of the Science Students. Science Reasoning Skills is correlated with Chemistry performance. Further, higher scientific reasoning skills are attributed to better Chemistry Skills. Primary language significantly affects language proficiency while subject interest affect the students skills in subject areas.
New Poly(Hydroxylauric-co-Lactic Acid) Liquid Polymer for Dissolving Lipophilic Drugs
Authors: Sumera Florentino C. , Pontillas Shienna Marie A. , Bilo Josanelle Angela V. , Mateo John Marty
Published: March 2018

A liquid, biocompatible polyester based polymer, which could facilitate injectable formulations by simple mixing with the active substance (drug) is much needed by the pharmaceutical companies. A favourite candidate is polylactic acid (PLA) which is biocompatible and biodegradable. However PLA is solid with high crystallinity. Thus, in this research, hydroxylauric acid (HOLA) was copolymerized with lactic acid (LA) in different ratios by polycondensation technique at 180 °C, without a metal catalyst and avoiding the formation of interfering lactides, to provide a liquid polyester. The copolymers molecular weights were determined by Gel Permeation Chromatography (GPC) and their physical states indicated as solid or liquid were noted. The structures as polyesters were confirmed by FT-IR and 1H NMR spectroscopy. Poly(HOLA:LA)  products from reactant ratios 0:100 is solid, while ratios of 20:80, 40:60 are mixed (paste) and 60:40, 80:20 and 100:0 are liquids. Thus, the liquid polyesters from the polycondensation of HOLA and LA without catalyst  were picked as potential candidates for dissolving hydrophobic drugs that could be used as injectables in controlled drug delivery experiments.
Novel Chitosan Microparticles for Sequestration of Overdosed Drug
Authors: Chakraborty Soma , Agbayani Patricia Teresa F. , Chua Modesto T.
Published: March 2018

Chitosan microparticles were synthesized by crosslinking chitosan and glycidyl trimethylammonium chloride modified chitosan inside the reverse micelles of Span and Tween 80. The particles were of uniform size with the average diameter of 10 μm. The particles swelled almost twice the original size in 20 min when dispersed in a buffer solution of pH 7.4.  The feasibility of chitosan microparticles as drug sequestrant was tested using propafenone as the model drug.  The particles sequestered free propafenone from a buffer solution of pH 7.4. In 20 min unmodified chitosan and modified chitosan microparticles sequestered 53% and 51.5% of the free drug respectively. The amount of drug sequestered increased with increase in the initial free drug concentration. The presence of normal saline also improved propafenone sequestration.
The Warning on Saturated Fat: From Defective Experiments to Defective Guidelines
Authors: Dayrit Fabian M.
Published: March 2018

Coconut oil has been adversely affected by the current dietary guidelines that advocate a lowering of total fat and the replacement of saturated fat with polyunsaturated fat. This recommendation has its origins in the saturated fat-cholesterol-heart disease hypothesis that Ancel Keys first proposed in 1957. This hypothesis became an official recommendation with the publication of the Dietary Guidelines for Americans in 1980 and has been adopted by many other countries and international agencies. The dietary recommendations also warn against coconut oil. Recently, the American Heart Association re-issued this warning in its 2017 Presidential Advisory. However, a critical review of the experiments that Keys conducted has revealed experimental errors and biases that cast serious doubt on the correctness of his hypothesis and the warnings against coconut oil. Further, the recommendation to decrease saturated fat recommendation effectively means an increase in unsaturated fat in the diet. The actual result has been an increase in omega-6 fats and a high omega-6 to omega-3 fat ratio. This unhealthy ratio has been linked to heart disease, the very disease that the AHA wants to target, as well as cancer and inflammatory diseases. Defective experiments have led to defective guidelines. This first paper in this series of papers will present these errors and biases and address the points raised by the AHA.
A Half-Truth is Not the Whole Truth: The AHA Position on Saturated Fat
Authors: Dayrit Fabian M.
Published: March 2018

This second in this series of papers will present the biases in the American Heart Association’s 2017 Presidential Advisory with respect to saturated fat. Although important differences in the metabolic properties of specific SFA have been known since the 1960s, the AHA still considers all SFA as one group having the same properties. There is abundant research available that supports the designation of C6 to C12 fatty acids as medium-chain fatty acids (MCFA). This is particularly relevant to coconut oil, which is made up of about 65% MCFA. Ignoring the evidence, AHA simply labels coconut oil as SFA. The AHA promotes half-truths, not the whole truth.
El papel del tipo de emprendimiento en la creación de valor a través de la innovación
Authors: Díaz Yaima , Guerrero Maribel , Peña Iñaki
Published: March 2018

Uno de los mayores retos de la economía consiste en transformar en valor económico aquellas actividades de innovación diseñadas e implantadas dentro y desde una organización. La actitud y actividad emprendedora, en numerosas ocasiones, contribuyen a que la innovación y el esfuerzo en innovación desarrollados en una empresa sean (re)compensados y rentabilizados en el mercado. A este respecto, la literatura destaca el importante papel de la innovación y el emprendimiento como motores impulsores del éxito empresarial, así como del desarrollo económico y social. El presente trabajo aporta un marco conceptual que permite explorar la influencia que puede ejercer el tipo de emprendimiento (independiente o corporativo) sobre la creación de valor generado desde la innovación dentro de las organizaciones.
Study on the location of building evacuation indicators based on eye tracking
Authors: Li Yue , Zhang Ping , Zhang Hui
Published: March 2018

Evacuation indicator is an important factor affecting evacuation efficiency during emergency evacuation. In order to study the relationship between the distribution of human’s points of regard and evacuation indicators during building evacuation, this paper carried out two groups of building emergency evacuation experiments, to get the data of human’s points of regard, one of the experimenters was selected to put on eye tracker during the experiment. This paper presents a method to preprocess the data of eye tracker and further analyzes the pretreatment results. The results show that evacuation indicators in different areas are suitable for different placement, which based on the position distribution of human’s points of regard. For example, evacuation indicators in the corridor are suitable for higher placement, and evacuation indicators in the staircase are suitable for lower placement.
On the feasibility of decentralized derivatives markets
Authors: Eskandari Shayan , Clark Jeremy , Adham Moe , Sundaresan Vignesh
Published: March 2018

In this paper, we present Velocity, a decentralized market deployed on Ethereum for trading a custom type of derivative option. To enable the smart contract to work, we also implement a price fetching tool called PriceGeth. We present this as a case study, noting challenges in development of the system that might be of independent interest to whose working on smart contract implementations. We also apply recent academic results on the security of the Solidity smart contract language in validating our code's security. Finally, we discuss more generally the use of smart contracts in modelling financial derivatives.
Case Database Construction and Temporal-spatial Analysis of Mass Incidents in China Based on GIS
Authors: Huang Lida , Chen Jianguo , Zhang Zewei , Yuan Hongyong , Deng Qing , Sun Feng
Published: March 2018

As one of the important research areas of public safety and sociology, the study of mass incidents is inseparable from the support of a large number of real cases data. However, there is a lack of available and reliable mass incidents databases in academic circles in China. Using the news retrieval approach, this paper builds a case database of mass incidents in China from 1998 to 2014 based on the GIS system. Then the spatial-temporal distribution rules of these mass incidents data are analyzed from the perspective of geography. Our research effectively integrates the temporal attributes, spatial attributes, organizational attributes and violence attributes of mass incidents. The results show the hot areas and temporal distribution of mass incidents and mass violence, and reveals the main triggers of these events.
Leveraging compute clusters for large-scale parametric screens of reaction-diffusion systems
Authors: Karim Md Shahriar , Othmer Hans G. , Umulis David M.
Published: March 2018

Reaction-diffusion (RD) models are widely used to study the spatio-temporal evolution of pattern formation during development. Nonlinear RD models are usually analytically intractable, and require numerical solution methods. Interrogation of RD models for a large physiological range of parameters covers many orders of magnitude- establishing situations where solutions are stiff and solvers fail to provide accurate results to the time-dependent problem. The spatial dependence of these parameters, and the nonlinearity of the underlying dynamics, impose additional challenges. We developed an efficient approach of simulating stiff RD models of pattern formation and we used supercomputer clusters to carry out a large scale screen of spatially varying parameters for biological pattern formation. The approaches outlined herein are applicable to any systems biology problem requiring numerical approximation of RD equations with spatially non-uniform properties and stiff non-linear reactions.
Transnational research across languages and cultures: Beyond monolingualism and intercultural competence
Authors: Guilherme Maria Manuela , Matos Ana Gonçalves , Sá Maria Helena Araújo
Published: March 2018

Thematic Stream: “Transnational research across languages and cultures: Beyond monolingualism and intercultural competence”
Topology Vulnerability Analysis of several Urban Metro Networks
Authors: Guo Lulu , Su Guofeng
Published: March 2018

In modern cities, urban metro systems gradually become an important transportation tool. The failure of metro may influence citizens’ travel and cause economic losses. It is a focal problem that assessing the vulnerability of metro networks at home and abroad. Several metro networks are modeled by a modified Space L, in which metro interchange and travel time are involved. The properties of these metro networks are calculated at first, showing that at the same size, the average degree is larger, the network efficiency is better. Then the vulnerabilities of metro networks under random attack and three malicious attacks are studied and discussed. It is discovered that the metro networks are vulnerable to the biggest travel-time-efficiency node-based attack(EA) and the highest betweenness node-based attack(BA), and robust against random attack. The four attacks harm Tokyo metro network least, which has a big size, the max average degree and clustering coefficient of the seven metro networks. Finally, the top ten stations in order under EA and BA are respectively listed as a case study of Shanghai metro.
Representation, Reconstruction and Recognition of 3D Objects
Authors: Burgin Mark , Klinger Allen
Published: March 2018

In this paper, we further develop the approach to image recognition based on 3D structural information representation and utilization of super-recursive algorithms. The approach suggested in this paper synthesizes feature recognition techniques with structural shape representations. In addition, problems of object identification, weak object identification and viable object identification are considered.
A Interface do Mestrado Profissional em Educação com a Formação de Professores da Educação Básica
Authors: Couto Maria Elizabete Souza , Larchert Jeanes Martins
Published: March 2018

O presente artigo apresenta o Programa de Pós Graduação em Formação de Professores – UESC -, e suas interfaces com a Educação Básica. Problematiza os processos formativos a partir das experiências vividas no cotidiano das práticas na docência e/ou na gestão. De natureza intervencionista a pesquisa desenvolvida nos projetos encaminha a formação do professor-pesquisador para a troca de experiências colaborativas, principalmente, no campo da educação infantil e da alfabetização. A integração do Programa com as escolas da Educação Básica tem proporcionado à Universidade pensar-se como debatedora das políticas públicas educacionais, comprometendo-se enquanto formadora de professores capazes de enfrentar problemas reais do processo educativo nas diversas atividades da educação dos municípios. Por fim, apresenta depoimentos dos egressos que colaboram para o entendimento da base teórico-metodológica da estrutura curricular e do rigor técnico-científico da formação.
Kombinasi Mode Cipher Block Chaining Dengan Algoritma Triangle Chain Cipher Pada Penyandian Login Website
Authors: Lombu Dafirius , Tarihoran Siska Dame , Gulo Irwan
Published: March 2018

Generally, the database access of a website lies in the user login. When the login data is not accompanied by security techniques, it is very easily accessible by other parties. One effort that can be done to solve the problem is to encode the login data of website users based on cryptographic technique algorithm. Triangle Chain Cipher (TCC) is one of the classic cryptographic algorithms that encode data doubly and generate keys randomly along the plain. The process of encryption and decryption are interdependent to be one of the advantages of this algorithm. This algorithm will be more effective when combined with the Cipher Block Chaining (CBC) operation mode that is widely used in modern cryptographic algorithms today. The feedback mechanism between the blocks in this mode of operation is the operating advantage. This study describes how to combine the mode of operation of block chaining cipher with triangle chain cipher algorithm so that cipher data login website generated more random and difficult to find its original meaning.
Analisa Pembangunan Aplikasi Pengolahan Data Akademik Berbasis Web
Authors: Anisya Anisya , Febriadi Bayu , Hidayat Wahyu
Published: March 2018

Vocational High School (SMK) is one form of a formal education unit that provides vocational education as a continuation of (Junior High School) SMP / MTs and equal. One of them is SMK N 1 Koto Baru. In the processing of academic data using Microsoft Excel and Microsoft Word applications, the number of students approximately 550 students are divided into 9 departments so it takes a long time in the processing of academic data. This study aims to analyze the development of SMK N 1 Koto Baru to process academic data such as attendance, assessment of daily exams, duties, and final exams. The development of this system uses PHP programming language and MySQL database. The results obtained from this study in the form of student report cards per academic year.
Противовоспалительное действие полиэкстракта ортосифона тычиночного (листья), толокнянки обыкновенной (листья), горца птичьего (трава), календулы лекарственной (цветки), солодки уральской (корень) на простату крыс
Authors: Николаев Сергей Матвеевич , Николаева Галина Григорьевна , Мондодоев Александр Гаврилович , Маркарян Артем Александрович , Николаева Ирина Геннадьевна , Нагаслаева Ольга Васильевна
Published: March 2018

Показано, что полиэкстракт, состоящий из экстрактов 5 растений, обладает выраженным простатопротекторным действием при экспериментальном хроническом простатите. Фармакотерапевтическая эффективность фитоэкстракта аргументирует возможность его использования в комплексном лечении и профилактике простатитов.
Получение низкомолекулярных гепаринов методом радиационной деструкции
Authors: Туаева Наталья Олеговна , Трухан Владимир Михайлович , Кардонский Дмитрий Александрович , Еганов Александр Анатольевич , Гребенкина Екатерина Викторовна , Веселов В. В.
Published: March 2018

Низкомолекулярные гепарины (НМГ) широко применяются в медицинский практике. Для получения НМГ существуют различные способы контролируемой деполимеризации нефракционированного гепарина (НФГ). В данной работе представлен метод радиационной деструкции водных растворов гепарина с помощью источника гамма-излучения на основе изотопа 60Co. Установлены оптимальные условия деполимеризации исходного гепарина. Изучена антикоагулянтная активность НМГ в зависимости от дозы облучения. Результаты исследования позволяют рекомендовать данный метод получения НМГ для разработки новых антикоагулянтов.
Селективное вольтамперометрическое определение серусодержащих аминокислот в лекарственных средствах и витаминных комплексах на электроде, модифицированном пленкой из гексахлороплатината рутения
Authors: Шайдарова Лариса Геннадиевна , Гедмина А. В. , Жалдак Э. Р. , Челнокова И. А. , Демина В. Д. , Будников Г. К.
Published: March 2018

Неорганическая пленка из гексахлороплатината рутения (III) (RuPtCl6), осажденная на поверхности электрода из стеклоуглерода, проявляет каталитическую активность при окислении серусодержащих аминокислот. Каталитическое электроокисление цистеина, цистина и метионина происходит при различных потенциалах. Выявлены оптимальные условия получения пленки RuPtCl6, при которых регистрируется наибольший каталитический эффект. Разработан способ селективного вольтамперометрического определения цистеина, метионина и цистина на электроде с пленкой RuPtCl6. Нижняя граница определяемых содержаний цистеина и цистина составляет 5 · 10–6 М, а метионина – 5 · 10–7 М. Предложенный способ вольтамперометрического определения использован для определения цистеина, цистина и метионина в лекарственных средствах и витаминных комплексах.
ANALISIS KESALAHAN PESERTA DIDIK PADA MATERI PERSAMAAN DAN PERTIDAKSAMAAN NILAI MUTLAK LINEAR SATU VARIABEL DI KELAS X SMA NEGERI 1 BANGKINANG KOTA
Authors: Zulfah Zulfah
Published: March 2018

Penelitian ini bertujuan untuk mendeskripsikan aspek kesalahan yang dilakukan peserta didik kelas X SMA Negeri 1 Bangkinang Kota dalam menyelesaikan soal-soal terkait materi Persamaan dan Pertidaksamaan Nilai Mutlak Linear Satu Variabel, mendeskripsikan kesalahan yang paling banyak dilakukan peserta didik kelas X SMA Negeri 1 Bangkinang Kota dalam menyelesaikan soal-soal terkait materi Persamaan dan Pertidaksamaan Nilai Mutlak Linear Satu Variabel, serta mengetahui seberapa besar persentase kesalahan peserta didik pada masing-masing aspek kesalahan. Metode pada penelitian ini adalah metode deskriptif kualitatif dan desriptif kuantitatif. Deskriptif kualitatif yaitu menggambarkan kesalaha-kesalahan yang dilakukan peserta didik dengan menggunakan kata-kata. Sedangkan deskriptif kuantitatif yaitu menggambarkan besar kesalahan-kesalahan yang dilakukan peserta didik dengan menggunakan angka. Suharsimi Arikunto (2006: 12) mengemukakan bahwa penelitian kuantitatif adalah pendekatan penelitian yang banyak dituntut menggunakan angka, mulai dari pengumpulan data, penafsiran terhadap data tersebut, serta menampilkan hasil. Menurut Sumanto (1995: 77) penelitian deskriptif berusaha mendeskripsi dan menginterpretasi apa yang ada (bisa mengenai kondisi atau hubungan yang ada, pendapat yang sedang tumbuh, proses yang sedang berlangsung, akibat yang terjadi atau kecederungan yang tengah berkembang). Berdasarkan hasil tes diagnostik pada materi persamaan dan pertidaksamaan nilai mutlak linear satu variabel diperoleh bahwa masih terdapat peserta didik yang melakukan kesalahan dalam menyelesaikan soal terkait materi tersebut. Kesalahan yang dilakukan peserta didik terdiri dari kesalahan prinsip 71% dan kesalahan konsep 69%.
PENERAPAN MODEL PEMBELAJARAN KOOPERATIF TIPE JIGSAW DENGAN MEDIA VCD UNTUK MENINGKATKAN HASIL BELAJAR FISIKA
Authors: Susanti Novi
Published: March 2018

Dalam proses belajar mengajar guru mempunyai tugas untuk memilih model pembelajaran berikut media yang tepat sesuai dengan materi yang disampaikan demi tercapainya tujuan pembelajaran. Dalamproses belajar mengajar di kelas terdapat keterkaitan yang amat erat antara guru, siswa, dan sarana. Penelitian tindakan kelas ini dilakukan dalam dua siklus dengan subyek penelitian siswa kelas XII IPA. 2 SMA Negeri 1 Pinggir semester 1 tahun pelajaran 2013/2014. Data keaktifan siswa dikumpulkan dengan pedoman observasi dan data tentang hasil belajar dikumpulkan dengan tes hasil belajar. Pelaksanaan tindakan diawali dengan membagi kelas atas 6 kelompok, menyampaikan tujuan pembelajaran, menyampaikan materi pembelajaran dengan media VCD,kerja kelompok dalam menyelesaikan soal, presentase kelompok dan tes. Hasilpenelitian menunjukkan Penerapan Model Pembelajaran Kooperatif Tipe Jigsaw melalui Media VCD sebagai media pembelajaran listrik statis dapat meningkatkan keaktifan siswa dan dapat meningkatkan hasil belajar siswa dari rata-rata 69,58  dengan ketuntasan klasikal 71% pada siklus I menjadi 77,50 dengan ketuntasan klasikal 88% pada siklus II. Dari hasilpenelitian dapat disimpulkan bahwa Penerapan Model Pembelajaran Kooperatif tipe Jigsaw malalui Media VCD sebagai media pembelajaran dapat meningkatkan hasil belajar fisika siswa, sehingga dapat dijadikan alternatifpilihan pada pembelajarn fisika.
PENGGUNAAN MODEL PEMBELAJARAN KOOPERATIF TIPE ROTATING TRIO EXCHANGE UNTUK MENINGKATKAN HASIL BELAJAR EKONOMI PADA TOPIK PERSAMAAN DASAR AKUTANSI
Authors: Ekawati Sri
Published: March 2018

Penelitian ini bertujuan untuk mengetahui sejauhmana hasil belajar keterampilan psikologi ekonomi akuntansi mahasiswa melalui pendekatan kooperatif. jenis Rotating Trio Exchange dapat meningkatkan aktivitas dan hasil belajar siawa. Penelitian tindakan kelas ini dilakukan dalam dua siklus dengan 5 pertemuan. Dari penelitian tindakan kelas ini diperoleh data bahwa ada peningkatan aktivitas belajar siswa dari siklus I ke siklus II. Hal ini ditunjukkan dengan pencapaian indikator keberhasilan yang telah ditetapkan dalam penelitian ini. Siswa yang berada di awal siklus merasa aneh dan kurang antusias dalam belajar, pada akhir siklus II, menjadi antusias dengan proses pembelajaran. Hasil pengamatan indikator aktivitas dalam proses pembelajaran akhir siklus Idan siklus II menunjukkan bahwa siswa yang bekerja sesuai prosedur diberikan oleh LKS. Kemampuan siswa dalam menggunakan tabel, membaca transaksi pada subjek kemajuan sangat berarti. Dilihat dari semakin banyak digunakan siswa belajar dengan menggunakan media pembelajaran. Dari hasil pembelajaran, tingkat penyerapan rata-rata diperoleh dari 52,50% (pada akhir siklus I) menjadi 88,22% (pada akhir siklus II) dengan kategori Sangat Baik. Berdasarkan hasil penelitian, penerapan Cooperative Type Rotating Trio Exchange dikatakan efektif. Kriteria keberhasilan yang ditetapkan dalam penelitian ini tercapai dengan sempurna, yaitu melebihi target. Sehingga dapat meningkatkan hasil belajar keterampilan psikomotor kelas XI IPS 3 SMAN 2 Siakhulu.
PENGGUNAAN MODEL PEMBELAJARAN THINK-TALK-WRITE (TTW) UNTUK MENINGKATKAN HASIL BELAJAR PENDIDIKAN AGAMA ISLAM (PAI) PADA POKOK BAHASAN HIDUP NYAMAN DAN PERILAKU JUJUR
Authors: Yulinar Yulinar
Published: March 2018

Telah dilakukan penelitian tindakan kelas di SMA Negeri 2 Bangkinang Kota pada mata pelajaran Pendidikan Agama Islam (PAI)dengan objek penelitian siswa kelas XI IPA 3 pada semester ganjil 2016/2017. Penelitian ini dilakukan sebagai upaya untuk meningkatkan hasil belajar Pendidikan Agama Islam (PAI)pada pokok bahasan hidup nyaman dengan perilaku jujur untuk siswa kelas XI IPA 3. Model pembelajaran Think-Talk-Write (TTW)dipilih untuk diterapkan setelah melalui hasil observasi dan refleksi yang dilakukan oleh peneliti. Peneliti merencanakan tindakan berdasarkan hasil observasi dan refleksi yang telah dilakukan melalui penyusunan perangkat pembelajaran berbasis pembelajaran Think-Talk-Write (TTW) yang terdiri dari soal-soal tes (ulangan), lembar observasi dan rencana pembelajaran serta perangkat pembelajaran pendukung lainnya. Model pembelajaran Think-Talk-Write (TTW) sesuai dengan Kurikulum 2013 terdiri dari 5 tahap utama yaitu: siswa mengamati, menanya, mengumpulkan data, mengasosiakan, dan mengkomunikasikan. Penelitian ini dapat diselesaikan dalam 2 siklus 4 kali pertemuan dan empat kali ulangan harian. Hasil penelitian yang merupakan data observasi dan rekapitulasi hasil tes (ulangan) dan rekapitulasi ketuntasan belajar menunjukkan telah terjadi peningkatan aktivitas belajar siswa yang positif di kelas dan peningkatan rerata tes (ulangan) serta peningkatan ketuntasan klasikal dari siklus 1 ke siklus 2. Aktivitas siswa selama proses pembelajaran diamati oleh observer sebagai data untuk melakukan evaluasi dan refleksi. Rekapitulasi rerata tes (ulangan) dan ketuntasan belajar didapat dari nilai ulangan siklus 1 dan ulangan siklus 2. Berdasarkan hasil penelitian dapat disimpulkan bahwa penggunaan model pembelajaran Think-Talk-Write (TTW) di kelas XI IPA 3SMA Negeri 2 Bangkinang Kota mampu meningkatkan hasil belajar mata pelajaran Pendidikan Agama Islam (PAI)yang ditunjukkan dengan rerata tes (ulangan) dan ketuntasan klasikal disetiap siklus.
Dijital Oyunlar ve İstihdam: Türkiye İçin Öneriler
Authors: AKÇETİN Eyüp , ÇELİK Ufuk , YALDIR Abdulkadir , HERAND Deniz
Published: March 2018

Bilgi ve iletişim
teknolojilerindeki yeni gelişmeler dijital bir dünyaya adım atmamızı
sağlamıştır. Dijital dünya ise dijital bir ekonomiye dönüşmekte ve bu
dönüşümden dijital ürünlerin katma değeri doğrudan etkilenmektedir. Hollywood
filmlerinin yerine artık dijital oyunlar almış, dijital oyun sektörü katma
değeri ve istihdamı yüksek bir sektör haline gelmiş ve hasılatı ise sinema
endüstrisinin iki katını aşmıştır. Dijital oyun endüstrisi kriz dönemlerinde
bile etkilenmeden büyüyen sektörlerin başında gelmektedir. Dijital oyun
endüstrisi teknolojik olarak en güçlü ülkelerde kendine uygun iklimi bulmuş ve
en çok gelir getirici oyunların ve yan ürünlerin tasarlanması ve satışı yine bu
ülkelerde yapılmıştır. Dijital oyun endüstrisi istihdam ve sosyal alandaki
diğer faaliyetler yanında, sinema gibi birçok sanatsal öğeyi ve sosyal mesaj da
barındıran bir alandır. Bu nedenle, Türkiye’nin dünyaya kendini doğru tanıtması
ve ifade etmesi açısından katma değeri yüksek dijital oyun sektöründe yeterli
söz sahibi olması kaçınılmazdır. Bu çalışma kapsamında dijital oyun sektörünün
genel olarak ekonomik analizi karşılaştırmalı bir şekilde yapılmaya çalışılmış
ve Türkiye’nin bu fırsatı en iyi şekilde değerlendirmesine yönelik önerilerde
bulunulmuştur.
Influence of arbuscular mycorrhizal fungi and Trichoderma viride on growth performance of Salvia officinalis Linn.
Authors: Kumar Aditya , Aggarwal Ashok , Kaushish Sunita
Published: March 2018

Salvia officinalis (Sage) is a popular kitchen herb, member of mint (Lamiaceae) family has been cultivated for its wide range of medicinal values. Arbuscular mycorrhizae (AM) are beneficial symbionts for plant growth and development and offer a viable replacement of high input agricultural technology employed for production of environmentally hazardous fertilizers. Therefore, the present study was focused to analyze the effect of two AM fungi (Acalospora laevis and Glomus mosseae) along with Trichoderma viride, alone and in combination, on different growth parameters of S.officinalis in a green house pot experiment with sterilized soil. AM inoculum and T.viride showed significant increase of different growth parameters after 45 and 90 days of inoculation. Among all treatments, dual combination of A.laevis plus T.viride was most effective in increasing shoot length, leaf area, root length, root weight, AM spore number and percent root colonization. Moreover, maximum increase in shoot biomass was found in plant treated with T.viride.
Study on digestive tract contents of fish : Preliminary step for identification of indigenous species in mosquito larval control
Authors: Devi N. Pemola , Jauhari R. K.
Published: March 2018

The present study is based on screening of food preference by the indigenous fish under its natural condition. The gastrointestinal contents as an indicative of effective bioregulatory activity envisage the selection of a larvivorous fish. As many as 32 species of fishes were collected from their natural habitats at Imphal and Bishenpur districts in Manipur State between August 2007 to February 2008. Faecal drops of active fishes revealed remains of larvae / pupae of mosquitoes. However, the food types in 26 species of fish comprised larvae / pupae of mosquito, algae, weeds, tadepole fishes, crustaceans, insects, gastropods, worms and detritus / debris. On the basis of food preference Aplocheilus panchax, Polyacanthus fasciatus and Puntius manipurensis have been considered as most potent larvivorous fish of the study area.
Impact assessment of heavy metals pollution of Vartur lake, Bangalore
Authors: Jumbe Aboud S. , Nandini N.
Published: March 2018

The unscientific disposal of wastes and pollution in urban water bodies has caused immense problems not only to human beings but also to the aquatic biodiversity. Assessment of heavy metals in Vartur Lake, Bangalore, revealed that Cadmium (Cd), Cobalt (Co), Chromium (Cr), Nickel (Ni), and Lead (Pb) all exceeded drinking water standards. Nevertheless, Chromium (Cr) exceeded the CPCB’s tolerance limits for water bodies subjected to effluent discharge. In Eichornia crassipes, Cd, Co, Cr, and Ni were critical. In the sediments, Cadmium (Cd) and Nickel (Ni) exceeded the Probable Effect Level (PEL). Sediment Geo-accumulation Index of the lake showed moderate contamination with Mn, Cu, and Pb. Cr had the highest plant/sediments metal concentration factor even though its bioavailability in plants (71.5 ppm) was lower compared to Manganese (192.3 ppm). This calls for immediate action to be implemented to carry out necessary environmental mitigation measures for the lake.
Integrated nutrient management to enhance biochemical resistance in rice against sheath blight
Authors: Singh Ramji , Prasad Durga , Singh Alka
Published: March 2018

Application of potassium either as recommended, deficient or excess dose, enhanced the level of phenolic contents, increased incubation period and thereby decreased the sheath blight severity. Application of nitrogen and phosphorous, either as recommended, deficient or excess dose resulted in reduction of phenolic content, shorter incubation period and thereby increasing the sheath blight severity. Recommended sulphur application, enhanced the phenolic contents, increased incubation period and thereby decreased the sheath blight severity. Recommended zinc application resulted in enhancement of phenolic contents, longer incubation period and thereby decreasing the sheath blight severity. Excess application of zinc, reduced the phenolic contents and incubation period but the severity of sheath blight was also lowered down. Recommended iron application (1.5 kg./ha) enhanced the phenolic contents and incubation period with a decreased level of sheath blight severity. Deficient and excess doses of iron also showed the similar trend of effect on phenolics, incubation period and sheath blight severity.
Freshwater oligochaetes of India: A review
Authors: Singh H. S. , Agrawal Richa , Chaudhary Anshu
Published: March 2018

The present review deals with freshwater oligochaetes of India which records the presence of 102 species of freshwater oligochaetes belonging to 17 genera and 4 families. Besides this, a brief description of their global and Indian distribution has also been made along with their ecology, morphology of typical oligochaetes methods of their collection and preparation for taxonomic study has also been given. A thorough survey of various states is needed for the distribution of oligochaetes systematically.
Feed stock crop options, crop research and development strategy for bioenergy production in India
Authors: Ramesh S. , Gowda Balakrishna
Published: March 2018

Soaring prices of fossil-fuels and environmental pollution associated with their use, has resulted in increased interest in the production and use of bio-energy in India. Government of India has made policies to promote the production and use of bio-fuels which have triggered public and private investments in bio-fuel feed stock crop research and development and bio-fuel production. In this paper, efforts have been made to review and discuss various feed stock crop options and crop research and development interventions required to generate feed-stocksto produce required volume of bio-energy to meet projected demand without compromising food/fodder security and potential benefits of bio-fuels in reducing environment pollution and contributing to the energy security in India.
Impact of climate change on biodiversity of India with special reference to Himalayan region-An overview
Authors: Kumar Vinod , Chopra A. K.
Published: March 2018

India possesses a distinct identity, not only because of its geography, history and culture, but also because of the great diversity of its natural ecosystems. The panorama of Indian biological diversity is much wider, as it comes under the twelve mega biodiverse (Hot-spot) centers of the world. It contains a great wealth of biological diversity in its forests, its wetlands and in its marine areas which are distributed all over the country. This richness is shown in absolute numbers of species and the proportion they represent of the world total. The great Himalayan region has peculiar identity in the perspective of its unique biogeography. It supports a large number of glaciers, lakes, rivers, flora and fauna due to its variable climate. It has a profound effect on the climate of the subcontinent. But due to anthropogenic activities the global climate has changed since last few decades. The climate of the subcontinent has also adversely affected the biological resources of the country along with that of the Himalayan region. The present paper discusses the various causes responsible for melting and shrinkage of glaciers, decreasing water flow in the major rivers, increasing pressure of extinction of the ecological wealth of the country. It also talks about the control measures and various management steps which can be taken, with special reference to the Himalayan region.
Constitutively reduced sensory capacity promotes better recovery after spinal cord-injury (SCI) in blind rats of the dystrophic RCS strain
Authors: Rink Svenja , Bendella Habib , Alsolivany Kurdin , Meyer Carolin , Woehler Aliona , Jansen Ramona , Isik Zeynep , Stein Gregor , Wennmachers Sina , Nakamura Makoto , Angelov Doychin N.
Published: March 2018

Background:

We compared functional, electrophysiological and morphological parameters after SCI in two groups of rats Sprague Dawley (SD) rats with normal vision and blind rats from a SD-substrain “Royal College of Surgeons” (SD/RCS) who lose their photoreceptor cells after birth due to a genetic defect in the retinal pigment epithelium. For these animals skin-, intramuscular-, and tendon receptors are major available means to resolve spatial information.

Objective:

The purpose of this study was to check whether increased sensitivity in SD/RCS rats would promote an improved recovery after SCI.

Methods:

All rats were subjected to severe compression of the spinal cord at vertebra Th8, spinal cord segment Th10. Recovery of locomotion was analyzed at 1, 3, 6, 9, and 12 weeks after SCI using video recordings of beam walking and inclined ladder climbing. Five functional parameters were studied: foot-stepping angle (FSA), rump-height index (RHI) estimating paw placement and body weight support, respectively, number of correct ladder steps (CLS) assessing skilled hindlimb movements, the BBB-locomotor score and an established urinary bladder score (BS). Sensitivity tests were followed by electrophysiological measurement of M- and H-wave amplitudes from contractions of the plantar musculature after stimulation of the tibial nerve. The closing morphological measurements included lesion volume and expression of astro- and microglia below the lesion.

Results:

Numerical assessments of BBB, FSA, BS, lesion volume and GFAP-expression revealed no significant differences between both strains. However, compared to SD-rats, the blind SD/RCS animals significantly improved RHI and CLS by 6 – 12 weeks after SCI. To our surprise the withdrawal latencies in the blind SD/RCS rats were longer and the amplitudes of M- and H-waves lower. The expression of IBA1-immunoreactivity in the lumbar enlargement was lower than in the SD-animals.

Conclusion:

The longer withdrawal latencies suggest a decreased sensitivity in the blind SD/RCS rats, which promotes better recovery after SCI. In this way our results provide indirect support to earlier work showing, that hypersensitivity and chronic pain after contusive SCI impair the recovery of locomotor function.