Science: Recent submissions

Now showing items 301-320 of 846

A simulation based study for comparing tests associated with Receiver Operating Characteristic (ROC) curve

Jayasekera, D.; Sooriyarachchi, M.R. (Taylor and Francis, 2014)

Receiver Operating Characteristic curves and the Area Under Curve (AUC) are widely 7 used to evaluate the predictive accuracy of diagnostic tests. The parametric methods of 8 estimating AUCs are well established while ...
A Goodness of fit test for the Multilevel logistic model

Perera, Piumi; Sooriyarachchi, M.R.; Wickremasuriya, Shanika (Taylor and Francis, 2016)

It is crucial to test the goodness of fit of a model before it is used to make statistical inferences. However, no satisfactory goodness of fit test is available for the case of categorical multilevel data which occur when ...
Histological Alterations in the Body Wall of the Tropical Earthworm Eudrilus eugeniae Exposed to Hexavalent Chromium

Fernando, V. K.; Perera, Inoka C.; Dangalle, C. D.; Premawansa, S.; Wijesinghe, M. R. (2015)

The tropical earthworm Eudrilus eugeniae was chronically exposed to hexavalent chromium (Cr) in its substrate over a concentration range from 0.24 to 893 mg kg-1 . Histological alterations in the body wall epithelium ...
A model-data comparison of gross primary productivity: Results from the North American Carbon Program site synthesis

Schaefer, Kevin; Schwalm, Christopher R.; Williams, Chris; Arain, M. Altaf; Barr, Alan; Hollinger, David Y.; Humphreys, Elyn; Poulter, Benjamin; Raczka, Brett M.; Richardson, Andrew D.; Sahoo, Alok; Thornton, Peter; Vargas, Rodrigo; Verbeeck, Hans; Anderson, Ryan; Baker, Ian; Andrew Black, T.; Bolstad, Paul; Chen, Jiquan; Curtis, Peter S.; Desai, Ankur R.; Dietze, Michael; Dragoni, Danilo; Gough, Christopher; Grant, Robert F.; Gu, Lianhong; Jain, Atul; Kucharik, Chris; Law, Beverly; Liu, Shuguang; Lokipitiya, E.Y.K; Margolis, Hank A.; Matamala, Roser; McCaughey, J. Harry; Monson, Russ; Munge, J. William; Oechel, Walter; Peng, Changhui; Price, David T.; Ricciuto, Dan; Riley, William J.; Roulet, Nigel; Tian, Hanqin; Tonitto, Christina; Torn, Margaret; Weng, Ensheng; Zhou, Xiaolu (ResearchGate, 2012)

Accurately simulating gross primary productivity (GPP) in terrestrial ecosystem models is critical because errors in simulated GPP propagate through the model to introduce additional errors in simulated biomass and other ...
Graphene OxideeBased Nanocomposite for Sustained Release of Cephalexin

Katuwavila, Nuwanthi P.; Amarasekara, Yasuri; Jayaweera, Vimukthi; Rajaphaksha, Chamil; Gunasekara, Chinthika; Perera, Inoka C.; Amaratunga, Gehan A.J.; Weerasinghe, Laksiri (2019)

A sustained-release carrier system for the drug cephalexin (CEF) using functionalized graphene oxide is reported. PEGylation of GO (GO-PEG) and successful loading of CEF into PEGylated graphene oxide (GO-PEG-CEF) nanoconjugate ...
Synthesis and characterization of novel rhenium(I) complexes towards potential biological imaging applications

Ranasinghe, Kokila; Handunnetti, Shiroma; Perera, Inoka C.; Perera, Theshini (2016)

Background: Re(I) tricarbonyl complexes exhibit immense potential as fluorescence imaging agents. However, only a handful of rhenium complexes have been utilized in biological imaging. The present study describes the ...
Synthesis, Characterization, and Biological Studies of a Piperidinyl Appended Dipicolylamine Ligand and Its Rhenium Tricarbonyl Complex as Potential Therapeutic Agents for Human Breast Cancer

Subasinghe, Amali; Perera, Inoka C.; Pakhomova, Svetlana; Perera, Theshini (2016)

A novel ligand bearing a central piperidinyl sulfonamide group, N(SO2pip)dpa, and its corresponding Re tricarbonyl complex, [Re(CO)3(N(SO2pip)dpa)]+, have been synthesized in good yield. The methylene CH2 signal seen as ...
Past Trends and Future Projections of Climate and Hydrology over Asia including 18 Demonstration Basins in Asian Water Cycle Initiative (AWCI) Countries

Bae, D.; Koike, Toshio,; Lee, Moon-Hwan (APN Science Bulletin, 2014)

The present study analysed historical climate and hydrology trends of future climate change impacts over 18 demonstration basins in Asian Water Cycle Initiative (AWCI) countries. The Mann-Kendall test was employed for past ...
Fluorescent di-(2-picolyl)amine based drug-like ligands and their Re(CO)3 complexes towards biological applications

Darshani, Taniya; Thushara, Nadini; Weerasuriya, Piyumali; Fronczek, Frank R.; Perera, Inoka C.; Perera, Theshini (2020)

Herein we report two new fac-Re(I) tricarbonyl complexes, fac-[Re(CO)3(N(SO2)(1-nap)dpa)]PF6 (C1) and fac-[Re(CO)3(N(SO2)(2-nap)dpa)]PF6 (C2), of two naphthalene derivatized tridentate ligands (N(SO2)(1-nap)dpa (L1) and ...
Histidine switch controlling pH-dependent protein folding and DNA binding in a transcription factor at the core of synthetic network devices

Deochand, D. K.; Perera, Inoka C.; Crochet, R. B.; Gilbert, N. C.; Newcomer, M. E.; Grove, A. (2016)

Therapeutic strategies have been reported that depend on synthetic network devices in which a uratesensing transcriptional regulator detects pathological levels of urate and triggers production or release of urate oxidase. ...
Synthesis, Characterization, and BSA-Binding Studies of Novel Sulfonated Zinc-Triazine Complexes

Abeydeera, Nalin; Perera, Inoka C.; Perera, Theshini (2018)

Four Zn(II) complexes containing a pyridyl triazine core (L1 = 3-(2-pyridyl)-5,6-di(2-furyl)-1,2,4-triazine-5′,5″-disulfonic acid disodium salt and L2 = 3-(2-pyridyl)-5,6-diphenyl-1,2,4-triazine-4′,4″-disulfonic acid sodium ...
Effects of increased nitrogen deposition on soil nematodes in alpine tundra soils

Lokupitiya, E.; Stanton, N. L.; Seville, R. S.; Snider, J. R. (Pedobiologia, 2000)

Because of anthropogenic activities, atmospheric deposition of nitrogen has increased on some high elevation ecosystems in North America. On Elk Mountain in SE Wyoming, USA, we found that ice, formed by the impaction of ...
Evaluating the agreement between measurements and models of net ecosystem exchange at different times and timescales using wavelet coherence: an example using data from the North American Carbon Program Site-Level Interim Synthesis

Stoy, P. C.; Dietze, M. C.; Richardson, A. D.; Vargas, R.; Barr, A. G.; Anderson, R. S.; Arain, M. A.; Baker, I. T.; Black, T. A.; Chen, J. M.; Cook, R. B.; Gough, C. M.; Grant, R. F.; Hollinger, D. Y.; Izaurralde, R. C.; Kucharik, C. J.; Lafleur, P.; Law, B. E.; Liu, S.; Lokupitiya, E.; Luo, Y.; Munger, J. W.; Peng, C.; Poulter, B.; Price, D. T.; Ricciuto, D. M.; Riley, W. J.; Sahoo, A. K.; Schaefer, K.; Schwalm, C. R.; Tian, H.; Verbeeck, H.; Weng, E. (Copernicus Publications on behalf of the European Geosciences Union, 2013)

Earth system processes exhibit complex patterns across time, as do the models that seek to replicate these processes. Model output may or may not be significantly related to observations at different times and on different ...
Evaluation of the environmental and economic performances of three selected textile factories in Biyagama Export Processing Zone Sri Lanka

Shiwanthi, S; Lokupitiya, E; Peiris, S (2018)

The textile industry plays a critical role in the Sri Lankan economy. It is also a major consumer of energy and water and it is the fifth largest contributor to CO2 emissions in the world. With the increasing popularity ...
Network design for mesoscale inversions of CO2 sources and sinks

LAUVAUX, T.; SCHUH, A. E.; BOCQUET, M.; WU, L.; RICHARDSON, S.; MILES, N.; DAVIS, K. J. (The International Metrological Institute in Stockholm, 2012)

Recent instrumental deployments of regional observation networks of atmospheric CO2 mixing ratios have been used to constrain carbon sources and sinks using inversion methodologies. In this study, we performed sensitivity ...
Coupling land surface and crop growth models for predicting evapotranspiration and carbon exchange in wheat-maize rotation croplands

D. Yang, H. Lei; Lokupitiya, , E.; Shen, Y. (Copernicus Publications on behalf of the European Geosciences Union., 2010)

The North China Plain is one of the key crop-producing regions in China. However, water resources in the area are limited. Accurate modeling of water consumption and crop production in response to the changing environment ...
Comparison of missing value imputation methods for crop yield data

Lokupitiya, Ravindra S.; Lokupitiya, Erandathie; Paustian, Keith (Wiley InterScience, 2005)

Most ecological data sets contain missing values, a fact which can cause problems in the analysis and limit the utility of resulting inference. However, ecological data also tend to be spatially correlated, which can aid ...
Evaluating atmospheric CO2 inversions at multiple scales over a highly inventoried agricultural landscape

SCHUH, ANDREW E.; LAUVAUX, THOMAS; WEST, TRISTRAM O.; SCOTT DENNING, A.; DAVIS, KENNETH J.; MILES, NATASHA; RICHARDSON, SCOTT; ULIASZ, MAREK; LOKUPITIYA, ERANDATHIE; COOLEY, DANIEL; ANDREWS, ARLYN; OGLE, STEPHEN (Blackwell Publishing Ltd, 2012)

An intensive regional research campaign was conducted by the North American Carbon Program (NACP) in 2007 to study the carbon cycle of the highly productive agricultural regions of the Midwestern United States. Forty-five ...
Therapeutic uses of post-partum tissue-derived mesenchymal stromal cell secretome

Udalamaththa, Vindya Lankika; Kaluarachchi, Athula; Wijeratne, Sumedha; Udagama, Preethi Vidya (Indian Journal of Medical Science, 2020)

Human post-partum tissue mesenchymal stromal cells (hPPT-MSCs) are widely used in research to investigate their differentiation capabilities and therapeutic effects as potential agents in cell-based therapy. This is ...
Novel drug delivery systems for herbal remedies.

Jayasinghe, C D; Udagama, PV (Link Natural Digest, vol 11(2), 2016)

Herbal remedies have a long standing history of use in traditional medicine, and are the sources of important drugs such as atropine, codeine, digoxin, morphine, quinine and vincristine used in allopathic medicine. During ...

Now showing items 301-320 of 846

Search DSpace

Advanced Search

Browse

All of DSpace
This Community
- By Issue Date
- Authors
- Titles
- Subjects

Recently added

Science: Recent submissions

Search DSpace

Browse

All of DSpace

This Community

My Account