bluuebunny/crossref_metadata_2025 huggingface dataset:
Chemical Composition and Metal Speciation in Porewaters from the Upper Qu’Appelle River Basin, Saskatchewan
Authors: Farrell Richard E. , Yang Jae E. , Huang P. Ming , Liaw Wen K.
Published: March 2019

Porewater samples from the upper Qu’Appelle River basin in Saskatchewan, Canada, were analyzed to obtain metal, inorganic ligand and amino add profiles. These data were used to compute the aqueous speciation of the metals in each porewater using the computer program GEOCHEM-PC. The porewaters were classified as slightly to moderately saline. Metal concentrations reflected both the geology of the drainage basin and the impact of anthropogenic activities. Whereas K and Na were present almost entirely as the free aquo ions, carbonate equilibria dominated the speciation of Ca. Mg and Mn (the predominant metal ligand species were of the type MCO3 (s). MCO30. and MHCO3+). Trace metal concentrations were generally within the ranges reported for non-polluted freshwater systems. Whereas the speciation of the trace metals Cr(III) and Co(II) was dominated by carbonate equilibria, Hg(II)-, Zn(II)- and Fe(II)-speciation was dominated by hydroxy-metal complexes of the type M(OH)+ and M(OH)2°. The speciation of Fe(III) was dominated by Fe(OH)3 (s). In porewaters with high chloride concentrations (> 2 mM), however, significant amounts of Hg(II) were bound as HgCl20 and HgClOH0. The aqueous speciation of Al was dominated by Al(OH)4− and Al2Si2O4(OH)6 (s). Total concentrations of dissolved free amino acids varied from 15.21 to 25.17 umole L−1. The most important metal scavenging amino acids were histidine (due to high stability constants for the metal-histidine complexes) and tryptophan (due to its relatively high concentration in the porewaters. i.e., 5.96 to 7.73 umole L−1). Secondary concentrations of various trace metal-amino add complexes were computed for all the porewaters, but metal-amino acid complexes dominated the speciation of Cu(II) in all the porewaters and Ni(II) in two of the porewaters.
Boundary Layer Models for Inverse Estimates of Entrainment and Related Processes at the Sediment-Water Interface
Authors: Bedford K. W. , Wai O. W.
Published: March 2019

With entrainment estimation required for both field data analysis and models this paper provides a compendium of the theoretical concentration boundary layer models and auxiliary shear stress estimators required to invert for estimates of entrainment rates. The various models are roughly categorized by the type of forcing function treated and three categories are defined. Within each category, no effort is made to evaluate one model over another. The essential points are that one field deployment might require the use of all categories of models to cover the succession of forcing function responses at a particular site. Interfacial boundary conditions expressed in the form of bed concentration and shear velocity are summarized, especially with regard to the limits imposed by the assumptions used in the derivation.
Pesticides, Nitrate-N and Bacteria in Farm Wells of Kings County, Nova Scotia
Authors: Briggins David R. , Moerman Dennis E.
Published: March 2019

Water samples collected from 102 farm wells in the most intensively farmed region in Nova Scotia were analyzed for pesticides, nitrate-N and coliform bacteria. An additional 135 wells were sampled for nitrate-N only. None of the study wells contained pesticide concentrations above maximum acceptable concentrations for Canadian drinking water; however, very low pesticide levels were found in 41% of the wells. Atrazine was the most prevalent pesticide, occurring in 79% of the wells with detections. Nitrate-N and coliform bacteria exceeded the guidelines in 13 and 9% of the study wells, respectively. Statistical analysis of the data indicated that pesticide contamination was generally not related to well construction and surficial material parameters, but some correlations were found for nitrate-N and bacterial contamination. Case studies indicated that the majority of pesticide occurrences were attributable to nonpoint sources. Atrazine contamination may be the result of historic use rather than current agricultural practices.
Susceptibility of Groundwater to Pesticide and Nitrate Contamination in Predisposed Areas of Southwestern Ontario
Authors: Lampman Wray
Published: March 2019

Agricultural practices today employ a vast array of chemicals in large volumes in order to improve both the quantity and quality of our agricultural products. While it has long been recognized that runoff from agricultural land has the potential to degrade surface water quality, only recently has attention been focused on the effect of agricultural usage on groundwater. In order to study the effects of pesticides and nitrate usage on the quality of groundwater, in 1985 the Ontario Ministry of Environment and Energy began operating a groundwater monitoring program in southwestern Ontario.

Data generated from this program, which utilized sample data collected from both wells and piezometers, indicate that in areas of heavy pesticide and nitrate usage, shallow groundwater is continuously testing positive for nitrate and a variety of pesticides. Factors which influence the number of positive incidents for pesticides are directly related to the persistence of the chemical, its method of application, and the amounts utilized. Soil types and depth to groundwater, although influencing the time of detection, do not govern the number of detection events. Changes in agricultural practices are also monitored to see if pesticide reduction, a variation in the method of application, crop rotations and an increase in soil organic matter could influence the levels of pesticide It was found that when chemicals of a low persistence were applied post emergent at the minimum recommended rate, pesticides were not detected in the groundwater. Crop rotations were also effective in reducing the level of pesticides in groundwater. Tillage practices and increases in soil organic matter were also effective in reducing pesticide contamination.

It was found that when chemicals of a low persistence were applied post emergent at the minimum recommended rate, pesticides were not detected in the groundwater. Crop rotation and reduction in nitrate loadings were found to be the only effective methods to reduce nitrate loading to groundwater. It was also found that elevated levels of potassium and/or nitrate in groundwater serve as a reliable indicator of the groundwater susceptibility to pesticide contamination.

Remedial action to alleviate the impact of pesticides and nitrates in groundwater must focus on the chemical usage patterns employed on the farm site and an overall reduction of the quantities of pesticides and nitrates utilized. These patterns must incorporate a well-designed program of crop rotation with the proper utilization of these chemicals on site.
Stream Channel and Riparian Zone Rehabilitation in the Dauphin Lake Watershed, Manitoba
Authors: Gaboury M.N. , Janusz R.A. , Broughton K.E.
Published: March 2019

An extensive program of drain construction, stream channelization and diversion, begun in the early 1900s, expanded the area of cultivated, arable land within the Dauphin Lake basin. The developed drainage network altered flows, shortened natural streams, eliminated aquatic habitats, and caused channel erosion. The Stream Rehabilitation Program was developed in 1992 to rehabilitate riparian zones and unstable stream reaches within the seven major tributaries of the watershed. The rehabilitation strategy included stream condition assessments, improvement of the channel stability and aquatic habitats by reintroducing pool and riffle sequences, and involvement of landowners in the design and implementation of their on-farm riparian rehabilitation plans. Between 1993 and 1996, 36 km of straightened channels were rehabilitated using pool and riffle sequences, and 14 cooperating livestock producers implemented new farm layouts and practices. Under a signed stewardship agreement, landowners committed to maintain the project works and a minimum 10-m riparian corridor for at least 10 years. The Stream Rehabilitation Program has been adopted as a model for other watershed level management programs throughout Manitoba. The program has raised public awareness of fisheries, wildlife, recreation, agriculture and land stewardship issues.
Nitrogen and Phosphorus Removal in a Subsurface-Flow Reed Bed
Authors: Laouali Garba , Brisson Jacques , Dumont Linda , Vincent Gilles
Published: March 2019

During the last decades, there has been a growing concern over phosphorus and nitrogen removal in wastewater treatment systems. Excessive loads of these nutrients have been implicated in the eutrophication of water courses. Although effectiveness of constructed reed beds for primary and secondary wastewater treatments is well established, their capacity for nutrient removal is not as well documented, especially under northern temperate climates. We monitored nutrient removal in the experimental reed bed wastewater treatment of the Biosphère de Montréal, a museum entirely devoted to the important role of water in the ecosystem. Over the first 2 years of operation, nutrient removal during plant growing season averaged 60% for total nitrogen, 53% for Kjeldahl nitrogen, 73% for total phosphorus and 94% for phosphate. Removal remains acceptable in winter despite a slight decrease in efficiency. Nitrification-deni-trification appears to be the main mechanism responsible for nitrogen removal, while precipitation and adsorption account for most of the phosphorus removal.
An Investigation of Public Drinking Fountains and the Changes in Bacterial Colony Counts when Tap Water is Allowed to Flow
Authors: Loving Veronica A. , Burden Robert W. , Loving Anne Lagrange
Published: March 2019

The quality of drinking water is a worldwide concern. Public drinking fountains could contain microbes from the water as well as from the saliva, lips and fingertips of people who have used the fountain. In this study, water samples were collected and cultured for bacteria from 97 public drinking fountains at 0, 5 and 10 seconds after the water was turned on. Overall, this study found that running tap water for 5 seconds significantly decreases the numbers of microbes in the water, as does running it for 10 seconds. However, of the 27 different microbes that were isolated from 291 samples, increased colony counts were noted for many when the water was allowed to flow.
Occurrence and Elimination of Nonylphenol Ethoxylates and Metabolites in Municipal Wastewater and Effluents
Authors: Lee Hing-Biu , Peart Thomas E.
Published: March 2019

A survey of the concentrations of nonylphenol ethoxylates (NPnEO) and their metabolites in wastewater samples collected from a Canadian sewage treatment plant using primary and secondary treatment is presented. Twenty-four-hour composite raw sewage, primary effluent and final effluent samples were collected monthly over a one-year period. Levels of NPnEO (n = 1 to 17) and their metabolites, nonylphenol (NP) and nonylphenoxy carboxylic acids (NPnEC), in these samples were determined by HPLC and GC/MS methods. While ca. 85% of the total alkylphenolics in raw sewage are ethoxylates, the major component (nearly 80%) in the final effluent was in the form of carboxylic acids. During this study period, the median total alkylphenolic concentrations in raw sewage and final effluent were 526 and 248 nmol/L, respectively, representing an overall elimination rate of 53%. The estimated daily discharge of the nonylpheno-lics to the aquatic environment varied from 15 to 44 moles, with a median value of 20 moles. These data suggested that conventional sewage treatments are ineffective in the removal of the surfactant-derived metabolites.
Modélisation hydro-bio-chimique du bassin versant de la rivière Saint-Charles
Authors: Vescovi Luc , Mailhot Alain , Rousseau Alain N. , Villeneuve Jean-Pierre
Published: March 2019

Cet article présente la démarche de modélisation bio-chimique réalisée à l’aide des données existantes sur le bassin versant de la rivière Saint-Charles. L’objectif est de comprendre le comportement global du milieu récepteur de ce bassin versant. La modélisation de la qualité de l’eau avec le modèle QUAL2E est effectuée en considérant un état existant et un ensemble de scénarios. Les incertitudes sur les paramètres de dégradation et les données d’entrée ont fait l’objet d’une analyse de sensibilité. En général, les résultats des simulations de la qualité (DBO et coliformes fécaux) sont satisfaisants pour la partie amont mais pas pour la partie aval de la rivière. Une approche par scénarios a été développée pour mieux équilibrer le bilan des coliformes et de la DBO ainsi que pour estimer la réduction des charges polluantes sur le bassin nécessaire afin d’obtenir une qualité d’eau acceptable en regard des critères de qualité pour activités récréatives. Les résultats suggèrent qu’un ensemble de sources de coliformes et de DBO actuellement non répertoriées sont responsables de la mauvaise qualité de la partie aval de la rivière. L’hypothèse émise est que ces charges polluantes proviennent de fuites du réseau d’égouts.
Potential for Municipal Sewage Sludge Application on Agricultural Lands in Southern Quebec
Authors: Vasseur L , Shipley W , Ansseau C
Published: March 2019

In the present study, sludge composition from 112 municipalities in southern Quebec, Canada, were studied in order to examine the potential of alternative, environmentally sound sludge disposal, such as land application. Twenty-four municipalities with complete data set produced 24,000 dry tons of sludge per year. Of this amount, 47% (11,000 dry tons) could potentially be used for agricultural land application, according to Quebec standards. The other municipalities could not use their sludge for agricultural land application because of heavy metal contamination. The available areas of agricultural lands in southern Quebec are limited to about 149,454 ha. Considering that only 15% of this surface is adequate for sludge application and that a large part is already applied with manure, only 86,683 ha could be used for sludge application. Geographical Information System modeling in a smaller portion of this region showed that another 38% of land must be removed for other reasons, e.g., buffer zones around water bodies and roads. This left a surface area of approximately 54,000 ha or 5.4% of all agricultural land available for sewage sludge application in this region. Land application of sewage sludge may be possible but not without some limitations in some regions of southern Quebec. Other factors, such as pathogens contamination, climatic constraints and economic costs for the transportation and storage of sludge, must also be considered.
Occurrence of Nonylphenol Ethoxylates and Their Metabolites in Canadian Pulp and Paper Mill Effluents and Sludge
Authors: Lee Hing-Biu , Peart Thomas E.
Published: March 2019

A survey of the concentrations of nonylphenol ethoxylates (NPnEO) and their metabolites in the primary and secondary treated effluent and sludge samples collected from pulp and paper mills was conducted. Through the coordination of the Pulp and Paper Research Institute of Canada (PAPRICAN), 19 Canadian and one U.S. mill of various process types and waste treatment methods supplied samples in this study. Previously developed solid-phase extraction, supercritical fluid extraction, high performance liquid chromatography and gas chro-matography/mass spectrometry methods were used for the determination of NPnEO and their metabolites, nonylphenol (NP) and the carboxylates (NPEC), in effluent and sludge samples. The levels of NPnEO ranged from <2 to 129 (median 4.5) µg/L and from <2 to 71.3 (median 5.8) µg/L for the primary and secondary effluents, respectively. The concentrations of NP varied from <0.1 to 1.32 (median 0.35) µg/L in the primary effluent and from <0.1 to 4.32 (median <0.1) µg/L in the secondary effluent. NPECs were found in only one primary and four secondary effluent samples, with an overall concentration range from <1 to 32 µg/L. These results are lower than those reported for paper mill effluents discharged into the lower Fox River, WI, USA. For the pulp and paper mill sludge, the levels of NPnEO and NP, on a dry weight basis, varied from <1 to 90.8 (median 21) µg/g and from <0.05 to 121 (median 1.3) µg/g, respectively. While NPnEO and NP were detected in nearly all sludge, their concentrations were lower than those observed for digested sewage sludge. Again, NPEC were found in only four samples, with an overall range from <1 to 18.5 µg/g. No relationship between the nonylphenolic levels in the effluent samples and the process and waste treatment types of the mill was found.
Use of the Zebra Mussel (Dreissena polymorpha) as a Bioindicator for Aromatic Hydrocarbons in Hamilton Harbour
Authors: Marvin Chris , Allan Laurie , Bryant Douglas , McCarry Brian
Published: March 2019

Three methods for the extraction of polycyclic aromatic hydrocarbons (PAHs) from zebra mussels (Dreissena polymorpha) sampled from Hamilton Harbour were compared. Replicate freeze-dried mussel tissue samples were extracted using acid digestion, tissue homogenization (mechanical extraction) and ultra-sonication. Each extract was submitted to a cleanup procedure (alumina chro-matography and Sephadex LH20 gel chromatography), followed by analysis using gas chromatography-mass spectrometry (GC-MS). The three extraction methods were equally efficient, based on a statistical comparison of mean concentrations of individual PAHs. Mussel extracts, when subjected to bioassays with Salmonella typhimurium strain YG1029 (TA100-like) in the presence of an exogenous metabolic activation system (S9), exhibited significant mutagenic responses; these responses varied with the PAH content of the mussel extracts. Sources of PAHs in mussel extracts were determined by examining the profiles of sulfur-containing polycyclic aromatic compounds (thia-arenes). Comparison of the ratios of certain thia-arenes with ratios in source samples enabled identification of vehicular emissions and coal tar-contaminated sediment as two sources of PAH contamination in Hamilton Harbour.
Bisphenol A Contamination in Canadian Municipal and Industrial Wastewater and Sludge Samples
Authors: Lee Hing-Biu , Peart Thomas E.
Published: March 2019

A large-scale study on bisphenol A (BPA) contamination in Canadian municipal and industrial wastewater and sludge has been completed. A total of about 200 samples were collected, including those from 31 sewage treatment plants and 15 pulp and paper mills across Canada, as well as 13 industrial facilities in the Toronto area. The samples were extracted by previously developed solid-phase and supercritical carbon dioxide extraction procedures and were analyzed by gas chromatography-mass spectrometry. BPA contamination was detected in all of the 72 sewage samples, with concentrations ranging from 0.080 to 4.98 µg/L (median 0.329 µg/L) for the influent, and from 0.010 to 1.08 µg/L (median 0.136 µg/L) for the effluent. Of the 36 influent/effluent sample pairs studied, BPA in the influent is removed by the sewage treatment process at a median reduction rate of 68%. Levels of BPA accumulation in sewage sludge, for the 50 samples tested, ranged from 0.033 to 36.7 µg/g, on a dry weight basis. A wide range of BPA concentrations, from 0.23 to 149.2 µg/L, were observed for the wastewater collected from selected industrial facilities in the Toronto area. The more contaminated samples came from the sectors of chemicals and chemical products, commercial dry cleaning, as well as packaging and paper products. Based on these data, on-site releases of BPA by industrial facilities seem to be much more widespread than the National Pollutant Release Inventory (NPRI) database has suggested. While relatively high levels of BPA were found in some of the primary treated effluent collected from the deinking mills, BPA concentrations in the secondary treated effluent of all pulp and paper mills were low, with a range from < 0.005 to 0.0406 µg/L. Except for the samples derived from a few deinking mills, BPA contaminication in pulp and paper mill sludge was either low or undetected.
Contamination and Wildlife Communities in Stormwater Detention Ponds in Guelph and the Greater Toronto Area, Ontario, 1997 and 1998 Part II — Contamination and Biological Effects of Contamination
Authors: Bishop Christine A. , Struger John , Shirose Leonard J. , Dunn Lesley , Campbell G. Douglas
Published: March 2019

Due to concerns that wildlife may be attracted to Stormwater detention ponds and would be exposed to contaminants accumulating in these ponds, a field study of 15 Stormwater ponds and one natural wetland in Guelph and the Greater Toronto Area, Ontario, was performed in 1997 and 1998. At 9 of 16 sites, copper levels in water exceeded the Canadian Water Quality Guidelines (CWQGs) for the protection of aquatic life. Canadian Water Quality Guidelines were also exceeded by average water concentrations for lead at four sites, for zinc at three sites, for chromium at seven sites, and turbidity at ten sites. At the natural wetland, only turbidity levels exceeded the CWQGs. Sediments from all ponds contained concentrations of at least one contaminant that exceeded the “lowest effects level” (LED of the Guidelines for the Protection and Management of Aquatic Sediment in Ontario. Stormwater pond sediments contained concentrations exceeding provincial sediment quality guidelines at the LEL for polychlorinated biphenyls (PCBs), gamma-hexachlorocyclohexane (g-bhc), total Kjeldahl nitrogen (TKN) and total phosphorus (TP), turbidity, oil and grease, total PAHs, chromium, zinc, cadmium, copper, lead, nickel and arsenic. Concentrations of g-bhc, TKN, TP, cadmium, copper, lead, zinc and arsenic in the sediment of the natural wetland also exceeded the LEL. Sediments at one site exceeded the provincial guideline at the severe effect level for chromium. Concentrations of lead, zinc, cadmium and total PAHs in sediments were correlated with the age of the ponds. Concentrations of organochlorine pesticides and PCBs were low (<0.08 µg/g wet weight) in pump-kinseed (Lepomis gibbosus) collected from two ponds in Guelph. Red-winged blackbird [Agelaius phoeniceus) eggs from two ponds in Toronto contained up to 1130 ng/g pp’DDE and up to 670 ng/g total PCBs. Those concentrations were much higher than in a reference site, but an order of magnitude below concentrations associated with health effects in songbirds. Among four Stormwater ponds and one natural wetland in Guelph, there was statistically lower hatching success of northern leopard frogs (Rana pipiens) eggs, and larvae took longer to metamorphose into frogs at two Stormwater ponds. Statistically fewer tadpoles survived to metamorphosis at one Stormwater pond. We conclude that Stormwater ponds do not offer clean ecosystems for wildlife and the monitoring of contamination and its effects within Stormwater ponds is necessary.
The effect of auditor experience, type of personality and fraud auditing training on auditors ability in fraud detecting with professional skepticism as a mediation variable
Authors: Sanjaya Adi Putra Gede , Dwirandra Anak Agung Ngurah Bagus
Published: March 2019

The occurrence of fraud or intentional actions that do not appear at the time of auditing will have a negative impact on financial reporting. Along with the development of the times, fraud is increasingly prevalent. And the greater the public demand that the auditor can detect fraud, is something that the auditor must respond to. Data collection was carried out using a questionnaire, with 71 respondents consisting of all auditors working in the Public Accounting Office (KAP) spread across Bali Province. Respondents were selected based on the purposive sampling method. The analysis technique used is Partial Least Square (PLS). The results showed that audit experience, personality type, cheating audit training, and professional skepticism had a significant positive effect on the auditor's ability to detect fraud. And skepticism of being able to become a mediator is partially mediated by audit experience variables, personality types, and fraud audit training on the auditor's ability to detect. Future studies are expected to be able to expand the scope of the research area and use other variables that have not been used in this study.
The performance of artificial neural network, logistic regression, and random forest models to predict breast cancer in patients with type 2 diabetes mellitus (Preprint)
Authors: Kao Chia-Hung
Published: March 2019

BACKGROUND

Breast cancer incidence may be higher among patients with type 2 diabetes mellitus (T2DM) compared with the general population. This study evaluated the performance of three models for predicting breast cancer risk in patients with T2DM.

OBJECTIVE

This study evaluated the performance of three models for predicting breast cancer risk in patients with T2DM.

METHODS

In total, 1,267,867 patients with newly diagnosed T2DM between 2000 and 2012 were identified from Taiwan National Health Insurance Research Database. By employing their data, we created prediction models for detecting an increased risk of subsequent breast cancer development in T2DM patients. The available potential risk factors for breast cancer were also collected for adjustment in the analyses. The Synthetic Minority Oversampling Technique (SMOTE) was used to augment data points in the minority class. Each data point was randomly allocated to the training and test sets at a ratio of approximate 39:1. The performance of artificial neural network (ANN), logistic regression (LR), and random forest (RF) models were determined using the recall, precision, F1 score, and area under receiver operating characteristic curve (AUC).

RESULTS

The AUCs of all three models were significantly higher than the area of 0.5 for the null hypothesis (0.959, 0.865, and 0.834 for RF, ANN, and LR models, respectively). The RF model has the largest AUC among all models; moreover, it had the highest values in all other metrics.

CONCLUSIONS

Although all three models could accurately predict high breast cancer risk in patients with T2DM in Taiwan, the RF model demonstrated the best performance.

CLINICALTRIAL

This is not a chinical trial.
STRATEGI PENERAPAN E-GOVERNMENT PADA UPT TEKNOLOGI DAN KOMUNIKASI PENDIDIKAN DINAS PENDIDIKAN PROVINSI RIAU
Authors: Marlinda Pebriana
Published: March 2019

Penerapan e-government pada UPT Teknologi dan Komunikasi Pendidikan Dinas Pendidikan Provinsi Riau sudah terlaksana sejak lama, namun dalam penerapannya belum berjalan dengan baik. Kenyataan yang terjadi yaitu pemahaman dalam pemanfaatan e-government yang hanya sebatas penyediaan web site. Pada saat sekarang ini web site tersebut dalam keadan tidak beroperasi dikarenakan adanya kerusakan pada perangkat IT atau infrastruktur yang ada. Pihak UPT Teknologi dan Komunikasi Dinas Pendidikan Provinsi Riau tidak melakukan kerjasama untuk memelihara perangkat IT. Pelatihan yang dilaksanakan oleh pihak UPT Teknologi dan Komunikasi Pendidikan Dinas Pendidikan Provinsi Riau belum merata. Penelitian ini menggunakan metode kualitatif  dengan pendekatan deskriptif. Hasil penelitian menunjukkan bahwa strategi penerapan e-government yang dilakukan UPT Teknologi dan Komunikasi Pendidikan Dinas Pendidikan Provinsi Riau belum berjalan sebagaimana yang diharapkan, dikarenakan kurangnya sosialisasi dan pelatihan – pelatihan mengenai teknologi informasi dan komunikasi dibidang pendidikan.
Importancia del género Anolis (Lacertilia: Dactyloidae), como indicadores del estado del hábitat, en bosque pluvial tropical del Chocó
Authors: Regido Mosquera Jhon Tailor , Castro Herrera Fernando , Purroy Francisco José , Rengifo Palacios Mayra Yulenis
Published: March 2019

El objetivo fue cuantificar el valor de las especies del género Anolis como indicadores ecológicos del estado de conservación de los hábitats usados por estas especies en una zona de bosque tropical en el departamento del Chocó. El método de relevamiento por encuentro visual, fue empleado para establecer especies con mayor abundancia relativa en determinado sitio con distintos grados de cobertura vegetal, el patrón “A” son especies indicadoras de altos niveles de intervención donde se destacó Anolis chloris con el 88.2% de abundancia relativa, patrón “B” se referencia a las especies indicadoras de niveles medios de intervención, donde A. latifrons con el 75% de los individuos fueron registrados en este nivel de tolerancia y el patrón “C”, hace referencia a especies que se encuentran en áreas boscosas con un alto nivel de conservación de su estado natural, donde las especies A. anchicayae (92.8%) y A. notopholis (exclusiva) fueron las más importantes., en cuanto al  indice de Valor Indicador Ecológico “IndVal”, se reportaron cuatro especies indicadoras, con una diferencia estadísticamente significativa entre especies; A. anchicayae (IndVal: 92.9%), para áreas de bosque con muchos años de regeneración natural, A. chloris (IndVal: 88.2%), A. maculiventris (IndVal: 65.2%) y A. granuliceps (IndVal: 50.8%). Además, se realizo un análisis de similitud y complementariedad entres las diferentes coberturas, indicando el recambio y la exclusividad de especies entre las mismas y posteriormente se graficaron curvas de rango- abundancia. Los resultados sugerir a los Anolis como grupo indicador del estado de conservación de los bosques tropicales del Chocó.
The Influence of Cr Doped TiO2 on the Optical Property and Photocatalytic Activity under Sunlight Irradiation
Authors: Suhaili Siti Zulaikha , Yaakob Muhamad Kamil , Sheikh Mohd Saaid Siti Irma Yuana , Jais Umi Sarah
Published: March 2019

Pure TiO2 and Cr doped TiO2 (0.1-1.0wt% Cr) nanoparticles were synthesized via sol gel method. This study focuses on narrowing the TiO2 band gap energies in order to enhance the photocatalytic efficiency under visible light. The synthesized samples were characterized by X-Ray diffraction method (XRD), field emmision (FESEM) and also UV-Vis diffuse reflectance spectroscopy (DRS).The photocatalytic activity under sunlight irradiation was demonstrated by photocatalytic decomposition of methylene blue in water using UV/Vis spectrophotometer. The XRD analysis of pure TiO2 and doped TiO2 calcined at 500oC showed a mixture of anatase and rutile phases with decreasing crystallites size from 13.3nm to 11.6nm as the concentration of Cr was increased. The anatase-rutile phase transformation increased from 28.8% to 57.4%. An indication shows that at 0.75wt%, Cr the anatase and rutile phases have equal composition percentage. This study demonstrated that band gap energy of TiO2 was reduced with Cr doping which could enhance the photocatalytic efficiency. Sample containing 1.0wt% exhibit the lowest optical band gap energy at 2.86 eV. The optimum chromium doping concentration was found to be at 0.1 wt% Cr corresponding to band gap energy of 2.87 eV and degradation rate of 84%.
Effect of Culture Technique of Ganoderma Australe Mycelia on Percentage Removal of Leachate Organics
Authors: Wan Abdul Razak Wan Razarinah , Mahmood Noor Zalina , Abdullah Noorlidah
Published: March 2019

Leachate (liquid pollutant), which is highly contaminated with organic matter and toxic substances is a major problem that arised from landfill. Biological methods have proven to be effective to remove organic matters that are abundant in leachate. This study is intended to compare the used of free mycelia and immobilized mycelia of the white-rot fungi, Ganoderma australe for the  removal of landfill leachate organics. The organics fraction of landfill leachate was measured by biological oxygen demand (BOD5), and chemical oxygen demand (COD). The experiment revealed that free mycelia of G. australe showed capability in removing leachate BOD5  but not COD. However, the use of immobilized G. australe displayed the best result in the removal of BOD5 and COD leachate after 4 weeks of treatment in flasks with 93.09% and 17.84% percentage removal of BOD5 and COD, respectively. Therefore, G. australe can be considered potentially useful in the treatment of landfill leachate as they can help in removing BOD and COD due to their biodegradative abilities.
CHARACTERISTICS OF NATURAL MAGNETITE (Fe3O4) FROM BEACH SAND AS CATALYST APPLICATION IN MATERIALS INDUSTRY
Authors: Maulinda Maulinda , Zein Ikramullah , Jalil Zulkarnain
Published: March 2019

An identification of magnetite nanoparticles synthesized from natural iron sand using co-precipitation method has been conducted. The treatment was undertaken at room temperature and the heating used a pair of acid-base compounds, namely HCL as a solvent and NH4OH as a precipitate. Crystal structures, percentages of elements, particle sizes and magnetic characteristics of the materials were characterized by testing XRF, XRD and Permagraph. The results were then compared with the commercial material purchased from Aldrich (with 97% purity). From the results, it was found that the percentage value of the purity of Fe3O4 derived from natural sand before the extraction was 81.42%, and after the extraction it increased to 86.73%. Furthermore, the saturation magnetization (Ms) value for Fe3O4 ferrite from iron sand was 0.29 T, the residual magnetization or Remanen (Br) was 0.081 T, and Coersivity (Hc) was 1.82 kA/m.
PREPARATION OF INORGANIC CATALYST BASED HEMATITE (a-Fe2O3) COMPOUND EXTRACTED FROM ACEH IRON ORE MINERAL AND ITS CATALYTIC ACTIVITY ON TRANSESTERIFICATION OF COCONUT OIL
Authors: Ramli Muliadi , Astriet Anneza , Darmawan T. Banta , Saiful Saiful , Susilawati Susilawati , Idris Nasrullah
Published: March 2019

Hematite (Fe2O3) was successfully extracted from the Aceh iron ore mineral by precipitation method with employing sulphuricacid (H2SO4) as chemical agent.  Furthermore, the extracted hematite was modified with sodium metal (K), namely it doped with NaOH of 5% and 10% (w/w), respectively. Based on the characterization results using XRD and SEM- EDS proved that modified catalyst (Na2O/Fe2O3) with their homogeneous size were resulted while the hematite (Fe2O3) particles was dopped withNaOH at its low concentration of (5% wt/wt), however while doping with the higher concentration of NaOH (10% w/w), agglomeration was taken place among the catalyst particles in which decreasing the surface area of the modified catalysts. Finally, the modified catalyst (Na2O/Fe2O3) was successfully applied as an inorganic catalyst on transesterification of coconut oil and methanol (T = 55 – 60oC, 2 h)for forming methyl esters asbiodiesel compounds.
POPULATION STRUCTURE OF DIPTEROCARPACEAE SPECIES IN KETAMBE RESEARCH STATION, GUNUNG LEUSER NATIONAL PARK, ACEH TENGGARA
Authors: Amelia Rizki , Rasnovi Saida , Harnelly Essy
Published: March 2019

Ketambe Research Station is one of the oldest and most complete stations in the world which has abundant biodiversity. The Dipterocarpaceae is one of the family identified as growing in the forest area of Ketambe Research Station. Ecologically, Dipterocarpaceae has several limiting factors for its growth and distribution and the most determining factors are soil factors and climate. Dipterocarpaceae is also known as nest and source of food for orangutans, namely Shorea spp. Therefore, it is necessary to conduct research that aims to determine the population structure of Dipterocarpaceae species in Ketambe Research Station. The method used Quadrat Sampling Technique. Theplacement of the sampling plot was randomly carried out in 25 plots with an area of 1 ha. The result showed that there were three species of Dipterocarapaceae found in this station i.e., Parashorea lucida, Shorea johorensis and Hopea dryobalanoides. Based on the population structure pyramid, P. lucida will survive and develop in the future S. johorensis and H. dryobalanoides, on the other hand, are estimated to decrease or hardly survived in the future.
Chemical pneumonitis due to inhalation of lycopodium: a case report
Authors: Khalid Mahroo , Narasimhan Avantika Lakshmi , Master Maryam Kaizar
Published: March 2019

Background:

Lycopodium powder consists of dried spores of club moss plants, principally Lycopodium clavatum which is

flammable when in contact with air due to its high oil content.

Case Presentation:

A 15-year-old, previously healthy, female student presented to the Emergency Department with a 1-hour history of shortness of breath following accidental inhalation of lycopodium in school. The dyspnea was rapidly progressive and associated with multiple episodes of non-productive cough, chest tightness, and nausea. A portable chest X-ray showed opacified bronchi in the right lower lung with para hilar peribronchial prominence virtually indistinguishable from those seen in lower respiratory tract infection. She began desaturating on 15 L of oxygen and was unable to tolerate non-invasive positive pressure ventilation (NIPPV), hence, shifted to the intensive care unit (ICU). IV methylprednisolone was started at 40 mg q6h and was tapered to q8h the next day. The patient clinically improved and was stable by day 6.

Conclusion:

An extremely rare case of lycopodium inhalation by a school student led us to realize not only the importance of a thorough history in cases where presentations can overlap but also safety recognition during school laboratory training sessions.
Dramatic Bridge to Bridge Response Using the Impella 5.0 Device
Authors: Rosenbaum Andrew N , Konik Ewa , Boilson Barry , Kane Garvan , Stulak John , Behfar Atta
Published: March 2019

Percutaneous left ventricular assist devices are approved for cardiogenic shock, but there has been increasing interest in utilizing these devices for hemodynamic support as bridge to durable mechanical circulatory support (MCS). A 63 year-old male with severe ischemic cardiomyopathy was evaluated for MCS. Given severe MR at baseline, it was felt that the Impella 5.0 device would offer the best hemodynamic optimization. Transesophageal echocardiography (TEE) showed severely enlarged left ventricle (78mm) and severe MR (effective regurgitant orifice (ERO) of 0.65cm2 and regurgitant volume (RV) of 94ml. After introduction of an Impella with TEE demonstrating correct placement, mean wedge pressure fell to 11 mmHg, lacking prominent V-waves. The severity of MR decreased to mild-moderate (ERO 0.17cm2 and RV 30 ml). He underwent LVAD implant after five days of support. This case highlights the acute hemodynamic improvements observed after implantation of an Impella 5.0 in a patient with severe ischemic cardiomyopathy and functional mitral regurgitation, illustrating the benefit of percutaneous devices as bridge to durable MCS, especially in the setting of coexistent valvular disease.
Avaliação do Projeto Academia da Saúde em uma determinada cidade do Norte de Minas Gerais: percepções dos participantes envolvidos
Authors: Silva Ana Paula Siqueira , Cunha Saulo Daniel Mendes , Silva Luís Fernando Pereira da
Published: March 2019

Objetivo: Analisaras percepções dos participantes envolvidos no Projeto Academia da Saúde em uma determinada cidade do norte de Minas Gerais acerca da avaliação deste projeto: benefícios para a saúde, avaliação física antes da participação, avaliação dos estagiários, pontos positivos e negativos. Métodos: Trata-se de um estudo descritivo com abordagem qualitativa, de corte transversal.  A população foi composta por participantes do Projeto Academia da Saúde em uma determinada cidade do norte de Minas Gerais. A amostra foi composta por 2 grupos focais, totalizando 18 participantes. Como critérios de inclusão do estudo: participantes ativos e com participação mínima de 1 ano. A coleta de dados foi realizada através de um roteiro de entrevista semiestruturada. As informações coletadas através da entrevista foram submetidas à análise de categorias e à análise de discurso. Este projeto foi executado de acordo com resolução 466/2012 do conselho nacional de saúde. Resultados: Através dos discursos, foi possível identificar que as aulas de ginástica trouxeram benefícios aos participantes do Projeto Academia da Saúde. Conclusão: Em programas como este de atividade física é importante que todos os participantes do projeto tenham uma pré-avaliação física cautelosa, uma vez que abrange público diverso.
The Effect of Noni Leaves’ Age Variation On the Value of Absorbance and Wavelength In Certain Color Spectrums
Authors: Mouromadhoni Kasyfi Rifqi , Kuswanto Heru , Asmar Andi
Published: March 2019

This research is experimental research. The research aims to analyze the absorbance and wavelength values on the certain color spectrum based on the age of noni leaf sample. Variation in absorption and wavelength occurs in the red spectrum ranges between 650 to 700 nm. Maximum absorption occurs in the middle of noni leaf followed by the tip of noni leaf sample but the yellow leaf sample results poor absorption. Chlorophyll a has main leaf pigment the most which occurs in the light reaction of photosynthesis. The maximum absorption which ranges between 3,5 to 4,0 A occurs in the blue spectrum ranges between 400 to 450 nm. Chlorophyll b absorbs photon energy in sun light. A wavelength ranges between 500 to 600 nm occurs in the green spectrum which has low absorption of three samples ranges 0,5 to 1,5 A. The chlorophyll reflects light of the green spectrum; therefore, it causes low absorption.
Hubungan Antara Culture Shock Dengan Hasil Belajar Mahasiswa Tahun Pertama
Authors: Mitasari Zuni , Istikomayanti Yuswa
Published: March 2019

Adjustment to the new environment occurs both internally and externally, so students who can make adjustments gradually will be able to avoid the impact of psychological culture shock. The purpose of this research is to analyze the relationship of culture shock and adjustment to the first year student learning outcomes at Tribhuwana Tunggadewi University. This type of research is quantitative descriptive research with correlational study to determine whether there is a relationship between culture shock and student learning outcomes. Instrument of research data used is questionnaire to test culture shock with four likert scale answer option. Statistical test data obtained r = -0,217 and probability value (Sig. 2-tailed) = 0,054. The conclusion, negative correlation with probability value >0,05 then there is no relation between culture shock with student learning outcomes.
Pengembangan Media Video Bimbingan Konseling untuk Mengurangi Perilaku Bullying
Authors: Rahman Agrianur , Aryani Farida , Sinring Abdullah
Published: March 2019

The research aims to (1) the description of development needs of Guidance and Counseling  Video Media to Reduce Bullying Behavior, (2) the prototype  of Guidance and Counseling  Video Media to Reduce Bullying Behavior which is valid and acceptable, (3) the acceptance of Guidance and Counseling  Video Media to Reduce Bullying Behavior in SMAN 5 Makassar. The research was development  research or research and development which was based on research stages by Borg and Gall. The research employed collecting data technique through interview and scale. The results of research revealed that (1) the description of needs level of Guidance and Counseling  Video Media to Reduce Bullying Behavior showed that the video media very important and needed, (2) the prototype of Guidance and Counseling  Video Media developed was already valid and acceptable to Reduce Bullying Behavior, (3) the acceptance of Guidance and Counseling Media Video which was given to 10 students in small group test showed that there was change of bullying behavior level before and after viewing Guidance and Counseling Video Media. This meant that  guidance and counseling media video could reduce bullying behavior.
Academic Anxiety sebagai Distorsi Kognitif terhadap Skripsi: Penerapan Konseling Cognitive Behavior Therapy dengan Musik
Authors: Situmorang Dominikus David Biondi
Published: March 2019

In Indonesia, undergraduate thesis is still a pretty scary end task for most students. Many of them do procrastination, keep away from supervisors, do non-productive things as a form of anxiety diversion, and the most extreme is to commit suicide as a result of excessive academic anxiety on undergraduate thesis. The education counselor as one of the college internal agents is expected to solve the problems that often occur every year. Based on Cognitive Behavior Therapy (CBT) counseling approach, the academic anxiety experienced by students is a cognitive distortion caused by maladaptive core beliefs. The process to change the student's core beliefs to be more adaptive can be done with a modern technique, that is through music. In its application, CBT counseling using integrative technique through music consists of two, passive and active music therapy. What we need to know more about how CBT views academic anxiety as a problem and how the way to use integrative technique through music, so that counselors in Indonesia can comprehend conceptually about CBT counseling intervention with music appropriately in the future, in order to help students free from academic anxiety towards undergraduate thesis.
Pengembangan Instrumen Kecakapan Kerja Siswa Sekolah Menengah Kejuruan
Authors: Amirullah Muhammad , Supriatna Mamat
Published: March 2019

This research aims to develop the employability skills instrumen that will be used to measure the employability skills on vocational high school students. The method was used is a model of research and development. The instrumen developing is based on the results of the synthesis construct of employability skills theories. The sample were selected are 34 students of SMKN 13 Bandung. Based on the result of the research, it showed that the employability skills instrumen that was arranged had a good validity, shown by content validity with expert judgment and empiric validity with pearson product moment correlation. The reliability of the employability skills instrumen included an enough category that was shown by the high alpha reliability coefficient score that was 0.994
Implementasi Program Gerakan Orangtua Mengajar Untuk Meningkatkan Motivasi Belajar Siswa
Authors: Miftakhi Diah Rina , Hendrik Maulina
Published: March 2019

This study aims to describe the movement of parents teaching in schools in order to improve the motivation of learners by involving parents in school programs. This program is implemented one of the goals is to reduce the number of school dropouts that occur in coastal areas. This research uses qualitative naturalistic approach. Data collection is done through observation, interview, and documentation. The subjects of this study include principals, teachers, employees, parents of learners and learners. the validity of data is done by triangulation, prolongation of research and observation persistence. The results showed that the implementation of parental teaching movement that has been implemented in SD Negeri 10 Pangkalanbaru very effective implemented. The program that has been implemented is the carier day program. The program is implemented to foster the spirit and motivation and do not experience dropping out and have aspirations to continue their education to a higher level. The parents' tasks of the students in this parenting teaching program is that they are asked to describe and tell the profession all this time they do. The profession will also be associated with the subjects that are learned by the students in the school
Identifikasi Hasil Belajar Siskomdig Karena Efek POE Dibandingkan PRP Pada Siswa SMK
Authors: Kusuma Ines Rendra , Putro Setiadi Cahyono , Soraya Dila Umnia
Published: March 2019

The goals of this research are to find the difference of mean the cognitive and psychomotor learning outcome Simulation and Communication Digital due to implementation of POE learning model compare to learning model PRP . This research is using quasi experimental design through the type of Non-Equivalent Control Group Design. The hypothesist will be tested using Independent Sample of T-test. The result of this research showed that the mean difference test of students' learning outcomes in the cognitive obtained a significance of 0.006, while the psychomotor learning outcomes obtained a significance of 0.000. Based on the results of the average difference, the learning model that is superior to cognitive and psychomotor is the POE learning model.