277 articles for “Time of Concentration”

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Research ArticleOpen accessPhrase in the titleUncertainty Analysis of Time of Concentration Equations based on First-Order-Analysis (FOA) MethodAsghar AzizianThe time of concentration (Tc) is one the most important time parameters to predict the response of a catchment to a given rainfall and plays a key role in the hydrologic design and rainfall-runoff modeling. There are a huge number of empirical/semi-empirical equations for estimation of Tc and depending on several parameters such as rainfall attributes, topographic and land cover … …American Journal of Engineering and Applied Sciences, Vol. 11, Issue 1 · 19 Mar 2018 · 9,294 accessesView PDF Cite

Research ArticleOpen accessEvery word in the titleNoninvasive Measurement of Fecal Progesterone Concentration in Toy Poodles by Time Resolved Fluoroimmunoassay (TR-FIA)Satoshi Sugimura, Kaori Narita, Hideaki Yamashiro et al.Progesterone is an important reproductive hormone and measurement of its level by repeated blood samplings is beneficial to monitoring of estrus cycle. However, since toy poodles have a small body size and thin-walled blood vessels, repeated blood samplings cause stress and affect their preparation for mating or artificial insemination (AI). Therefore, a noninvasive method for monitoring progesterone concentration should be … …American Journal of Animal and Veterinary Sciences, Vol. 3, Issue 1 · 31 Mar 2008 · 6,564 accessesView PDF Cite

Research ArticleOpen accessEvery word in the titleMeasurement of Fibrinogen Concentration in the Plasma of Dogs: A Comparison Between Heat Precipitation and Modified Thrombin Clotting Time MethodLabrini V. Athanasiou, Theodoros A. Petanides, Manolis K. Chatzis, Manolis N. SaridomichelakisFibrinogen is a glycoprotein that plays a key role in blood clotting and is also a non-specific indicator of inflammation. The most widely used techniques for measuring plasma fibrinogen concentration include heat precipitation (Millar’s technique) and modified thrombin clotting time (Clauss method). Both techniques have been automated in a haematology analyzer (QBC-Vet Autoreader®, IDEXX; Millar’s technique) and in a newly … …American Journal of Animal and Veterinary Sciences, Vol. 8, Issue 2 · 18 May 2013 · 7,449 accessesView PDF Cite

Research ArticleOpen accessEvery word in the titleHigh Concentrations of Glucose can Activate or Inhibit Human Erythrocyte Aminolevulinate Dehydratase in vitro Depending Exposure TimeJ. C. Soares, D. Gabriel, V. Folmer et al.Hyperglycemia can cause oxidative stress and inactivate susceptible enzymes. In the present investigation we examined whether short-term incubations (24 or 48 h) with high concentrations of glucose (10-200 mmol L-1) inhibit ALA-D from human erythrocytes. Incubations of erythrocytes for 24 h with glucose (10 up to 40 mmol L-1) resulted in an increase of δ-ALA-D activity (P<0,001). Incubations of erythrocytes … …American Journal of Biochemistry and Biotechnology, Vol. 2, Issue 4 · 31 Dec 2006 · 6,686 accessesView PDF Cite

Research ArticleOpen accessEvery word in the titleCharacteristics of Collagen from Parrotfish (Chlorurus Sordidus), Tiger Grouper (Epinephelus Fuscoguttatus) and Pink Ear Emperor (Lethrinus Lentjan): Effect of Acetic Acid Concentration and Extraction TimeAsep Awaludin Prihanto, Abdul Aziz Jaziri, Mohammad D. Pratomo et al.The use of marine fish's skin waste such as parrotfish (Chlorurus sordidus), tiger grouper (Epinephelus fuscoguttatus), and pink ear emperor (Lethrinus lentjan) needs improvement to increase its economic value and sustainability. Therefore, this study aims to investigate the effect of fish skin to acetic acid ratio with different extraction times on the yield and characteristics of skin collagen obtained from … …OnLine Journal of Biological Sciences, Vol. 22, Issue 1 · 28 Jan 2022 · 6,675 accessesView PDF Cite

Research ArticleOpen accessIn the keywordsOptimum Conditions for Measuring Dehydrogenase Activity of Aspergillus niger using TTCA. E. Ghaly, N. S. MahmoudThe suitability of the triphenyl tetrazolium chloride (TTC) for dehydrogenase activity measurement of the vegetative cells of the fungal species Aspergillus niger was investigated. The triphenyl formazan (TF) yield increased with the increases in TTC concentration, pH, temperature and incubation time within the studied ranges. The effects of individual parameters, as well as the combined effects, on the TF yield … …American Journal of Biochemistry and Biotechnology, Vol. 2, Issue 4 · 31 Dec 2006 · 9,002 accessesView PDF Cite

Research ArticleOpen accessIn the keywordsForecasting Ozone Concentrations Using Box-Jenkins ARIMA Modeling in MalaysiaWan Rozita Wan Mahiyuddin, Nur Izzah Jamil, Zamtira Seman et al.Time series analysis and forecasting has become a major tool in many applications in air pollution and environmental management fields. Among the most effective approaches for analyzing time series data is the model introduced by Box and Jenkins. In this study, we used Box-Jenkins methodology to build Autoregressive Integrated Moving Average (ARIMA) model on the average of monthly ozone data … …American Journal of Environmental Sciences, Vol. 14, Issue 3 · 25 May 2018 · 8,943 accessesView PDF Cite

Research ArticleOpen accessIn the keywordsOptimized Earthquake Evacuation Routes Using Dijkstra's Algorithm and WinQSBSandra Huarcaya Gonzales, Hugo Vega-Huerta, Gisella Luisa Elena Maquen-Niño et al.This research analyzes and generates optimal evacuation routes in the Barranco district during earthquake scenarios using the Dijkstra algorithm implemented through WinQSB. A preliminary review was conducted to establish key concepts related to earthquake dynamics, evacuation route planning, and the application of Dijkstra’s algorithm. Given its high seismic exposure and the prevalence of aging infrastructure, Barranco is considered highly vulnerable … …Journal of Computer Science, Vol. 21, Issue 10 · 9 Dec 2025 · 2,851 accessesView PDF Cite

Research ArticleOpen accessIn the keywordsVariation of Surface Ozone Recorded at the Eastern Coastal Region of the Malaysian PeninsulaAida Shafawati Ismail, Mohd Talib Latif, Siti Zawiyah Azmi et al.Problem statement: Variations of ozone (O3) concentrations in the Eastern Coastal Region of the Malaysia peninsula were investigated using data obtained from the Malaysian Department of the Environment. The aim of this study was to determine the monthly and seasonal variations of ozone concentrations at all monitoring sites. This study deals with the air quality data recorded at four air … …American Journal of Environmental Sciences, Vol. 6, Issue 6 · 31 Dec 2010 · 8,072 accessesView PDF Cite

Research ArticleOpen accessIn the abstractIncreasing the Critical Micellar Concentration (CMC) of Surfactants Enhances the Removal of Pathogenic Bacteria, P. Aeruginosa, and S. Aureus from WastewaterImen Laadouze, Emna Grami et al.Antimicrobial effects of increasing Critical Micellar Concentration (CMCn) (n varying from 1-12) on Pseudomonas aeruginosa ATCC 27853 and Staphylococcus aureus ATCC 29213 over time of 5-, 10, and 20-minute exposures were evaluated. Three types of surfactants (Cetyltrime Thylammonium Ammonium Bromide (CTAB), Dodecyl Sulfate (SDS), and TX-100) were evaluated. The results showed that CTAB had the greatest impact on both bacterial … …American Journal of Environmental Sciences, Vol. 22, Issue 1 · 8 May 2026 · 1,992 accessesView PDF Cite