Comparative studies of physical, chemical and biological honey reported at bees development in altered environmental conditions

2015 ◽  
Vol 208 ◽  
pp. S81
Author(s):  
Manea Iuliana ◽  
Manea Laur Constantin
Keyword(s):  
Environmental Conditions ◽  
Comparative Studies ◽  
Physical Chemical

scholarly journals Simulations with Australian dragon lizards suggest movement-based signal effectiveness is dependent on display structure and environmental conditions

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Xue Bian ◽  
Angela Pinilla ◽  
Tom Chandler ◽  
Richard Peters
Keyword(s):  
Research Methods ◽  
Environmental Conditions ◽  
Comparative Studies ◽  
Habitat Structure ◽  
Signal Transmission ◽  
Lizard Species ◽  
Local Adaptations ◽  
Signal Divergence ◽  
Colour Signals ◽  
Optimal Signal

AbstractHabitat-specific characteristics can affect signal transmission such that different habitats dictate the optimal signal. One way to examine how the environment influences signals is by comparing changes in signal effectiveness in different habitats. Examinations of signal effectiveness between different habitats has helped to explain signal divergence/convergence between populations and species using acoustic and colour signals. Although previous research has provided evidence for local adaptations and signal divergence in many species of lizards, comparative studies in movement-based signals are rare due to technical difficulties in quantifying movements in nature and ethical restrictions in translocating animals between habitats. We demonstrate herein that these issues can be addressed using 3D animations, and compared the relative performance of the displays of four Australian lizard species in the habitats of each species under varying environmental conditions. Our simulations show that habitats differentially affect signal performance, and an interaction between display and habitat structure. Interestingly, our results are consistent with the hypothesis that the signal adapted to the noisier environment does not show an advantage in signal effectiveness, but the noisy habitat was detrimental to the performance of all displays. Our study is one of the first studies for movement-based signals that directly compares signal performance in multiple habitats, and our approach has laid the foundation for future investigations in motion ecology that have been intractable to conventional research methods.

scholarly journals Short Communication: Density and length-weight relationship of mudskipper (Periophthalmus spp.) in the mangrove area of Kairatu Beach, Maluku, Indonesia

2020 ◽  
Vol 21 (11) ◽  
Author(s):  
Diana Taniwel ◽  
Fredy Leiwakabessy ◽  
Dominggus - Rumahlatu
Keyword(s):  
Dissolved Oxygen ◽  
Environmental Conditions ◽  
Short Communication ◽  
Sampling Technique ◽  
Sandy Beaches ◽  
Chemical Parameters ◽  
Mangrove Area ◽  
Weight Relationship ◽  
Physical Chemical ◽  
Relationship Of

Abstract. Taniwel D, Leiwakabessy F, Rumahlatu D. 2020. Short Communication: Density and length-weight relationship of mudskipper (Periophthalmus spp.) in the mangrove area of Kairatu Beach, Maluku, Indonesia. Biodiversitas 21: 5465-5473. Mudskippers (genus Periophthalmus) fish species inhabit mudflat, sandy beaches, and mangrove areas. Their daily activities are influenced by tidal rhythms. The aim of this research was to identify the species of mudskipper, their density, and length-weight relationship of more density species in the mangrove area of ​​Kairatu beach, Maluku, Indonesia. This research was conducted from July to August 2018, 3 sampling sites using purposive sampling technique. The physical-chemical parameters of environmental conditions (temperature, dissolved oxygen, salinity, and pH of water) were measured directly on location (in-situ), while the different mudskippers species present in the study sites were identified in the laboratory at the Pattimura University. Quantitative data on population density and length and weight of individuals were obtained for four Periophthalmus species. The physical-chemical parameters of environmental conditions in the three sampling stations were within the range of optimal values previously obtained for mudskipper species. The temperatures ranged from 30.01-30.05 oC, the dissolved oxygen ranged from 7.1-7.5 mg/L, the pH ranged from 7.3-7.5, and the salinity ranged from 5-7 ‰. The four mudskippers species identified in the sampling sites were (in density descending order): Periophthalmus argentilineatus (5.05 ind/m2), P. gracilis (1.5 ind/m2), P. malaccensis (0.4 ind/m2) and P. kalolo (0.3 ind/m2). The results of the regression analysis showed that there was no significant relationship between physical-chemical parameters to mudskipper density. The results of the length-weight relationship of the two most abundant species P. argentilineatus and P. gracilis a negative allometric length-weight relationship (b<3), while the P. kalolo and P. malaccensis indicated a positive allometric growth type (b>3).

UHPC and FRC in Severe Environmental Conditions

2016 ◽  
Vol 711 ◽  
pp. 412-419 ◽  
Author(s):  
Stanislav Rehacek ◽  
Ivo Simunek ◽  
David Citek ◽  
Jiří Kolísko
Keyword(s):  
Environmental Conditions ◽  
Cement Composite ◽  
Joint Effect ◽  
Experimental Program ◽  
Cement Composites ◽  
Structure And Properties ◽  
Physical Chemical ◽  
Chemical Agents ◽  
Macro Scale ◽  
Scale Properties

Structure and properties of cement composite are time-varying characteristics, depending among others on environmental conditions. The key idea is a struggle for complex research of joint effect of physical, chemical and dynamic loads on the internal structure [1] of cement composite and understanding the correlation between changes in microstructure and macro-scale properties [2, 3]. During the experimental program, specimens will be exposed to combined influence of freeze-thaw cycles [4,5,6], aggressive chemical agents [7] and dynamic loading [8]. The aim is to create a theoretical basis for design of effective cement composites meant to be used in severe environmental conditions.

scholarly journals Fungal genomes tell a story of ecological adaptations

2014 ◽  
Vol 10 ◽  
pp. 9-17
Author(s):  
Anna Muszewska
Keyword(s):  
Study Design ◽  
Environmental Conditions ◽  
Comparative Studies ◽  
Genomic Sequence ◽  
Plant Biomass ◽  
Complex Compounds ◽  
Cellular Processes ◽  
Ecological Adaptations ◽  
Fungal Genomes ◽  
Global Carbon

One genome enables a fungus to have various lifestyles and strategies depending on environmental conditions and in the presence of specific counterparts. The nature of their interactions with other living and abiotic elements is a consequence of their osmotrophism. The ability to degrade complex compounds and especially plant biomass makes them a key component of the global carbon circulation cycle. Since the first fungal genomic sequence was published in 1996 mycology has benefited from the technolgical progress. The available data create an unprecedented opportunity to perform massive comparative studies with complex study design variants targeted at all cellular processes.

scholarly journals Biofilm and methods of its eradication

2019 ◽  
Vol 73 ◽  
pp. 397-413
Author(s):  
Wojciech Szlauer ◽  
Ewa Obłąk ◽  
Emil Paluch ◽  
Katarzyna Baldy-Chudzik
Keyword(s):  
Extracellular Matrix ◽  
Drug Resistance ◽  
Quorum Sensing ◽  
Natural Environment ◽  
Environmental Conditions ◽  
Metabolic Profile ◽  
Physical Chemical ◽  
Abiotic Surfaces ◽  
Expression Of Genes ◽  
Hospital Patients

Microorganisms occur in the natural environment in the form of planktonic or create biofilms, i.e. communities of cells surrounded by the extracellular matrix. This is possible due to the phenomenon of quorum sensing, i.e. the ability of microorganisms to estimate their own density and change the expression of genes in response to them. Within such a structure, microorganisms are protected against harmful environmental conditions, their metabolic profile and the level of expression of individual genes are also changed, which leads to an increase in the pathogenicity of organisms associated in the form of biofilms. They pose a huge threat to hospital patients because they are capable of residing abiotic surfaces, such as catheters and endoprostheses, and can cause infection. The current methods of combating microbes with antibiotics and fungicides lose their effectiveness, both due to the increasing drug resistance of clinically relevant strains, but also to the very properties of biofilms. This determines the need to search for new and effective methods (physical, chemical and biological) to eradicate biofilms

scholarly journals Identifying Modern Slavery through Occupational Hygiene Conditions of Nineteenth-Century Slaves

2019 ◽  
Author(s):  
Gairo Oliveira Garreto ◽  
João Santos Baptista ◽  
Antônia Mota ◽  
António Torres Marques
Keyword(s):  
Occupational Exposure ◽  
Environmental Conditions ◽  
Web Of Science ◽  
Historical Documents ◽  
Occupational Hygiene ◽  
Physical Chemical ◽  
Modern Slavery ◽  
Rural Work ◽  
The 19Th Century ◽  
Detailed Picture

The Brazilian economy, the rural in particular, was until the end of the 19th century based on slave labour. In this research, it was intended to obtain, through a review of historical descriptive studies, a detailed picture of the occupational hygiene conditions related to the slaves&rsquo; work and their interactions with climatic and environmental conditions. The search was done in the following databases: Science Direct, Scopus, Web of Science, Criminal Justice, Ebsco, Business Source Supplement, as well as original historical documents. Descriptive studies, without the restriction of language, were selected that involved the rural work of slaves in colonial and imperial Brazil. Working environmental conditions have been evaluated: environmental and occupational hygiene conditions to which the captive workers were exposed, as well as their accommodation and clothing. The analysed studies registered the existence of accommodation and similar dresses all over Brazil, regardless of the region's climate. In addition to these accommodation conditions, slaves were still exposed in a similar way to physical, chemical and biological agents throughout the country. Finally, it was also possible to identify a clear similarity with the occupational exposure conditions of the modern slaves in the 21st century.

COSS: A TESTING FACILITY FOR OIL SPILL RESEARCH AND DEVELOPMENT

1997 ◽  
Vol 1997 (1) ◽  
pp. 996-998 ◽  
Author(s):  
Timothy J. Reilly ◽  
Robin Jamail
Keyword(s):  
Research And Development ◽  
Oil Spill ◽  
Environmental Effects ◽  
Environmental Conditions ◽  
Corpus Christi ◽  
Physical Chemical ◽  
General Land Office ◽  
Testing Facility ◽  
Oil Spill Response ◽  
Design And Construction

ABSTRACT A facility known as the Coastal Oil Spill Simulation (COSS) system has been constructed to test the efficacy and environmental effects of physical, chemical, and biological oil spill response technologies under realistic coastal and nearshore environmental conditions. The COSS facility is located in Corpus Christi, Texas. Oil spill research and development experiments will begin at the COSS facility in the summer of 1997. The Texas General Land Office and the Marine Spill Response Corporation have sponsored the design and construction of the COSS facility.

scholarly journals A study on limnological aspects of Ramsagar lake in Dinajpur district

2016 ◽  
Vol 13 (1) ◽  
pp. 145-152
Author(s):  
Z Ferdoushi ◽  
RH Chowdhury ◽  
K Fatema ◽  
A Islam
Keyword(s):  
Water Quality ◽  
Environmental Conditions ◽  
Quality Parameters ◽  
Total Alkalinity ◽  
Total Hardness ◽  
Chemical Parameters ◽  
Physical Chemical ◽  
Physico Chemical ◽  
Sampling Points ◽  
Aquatic Flora

Limnological aspects of the Ramsagar lake, a manmade lake of Dinajpur district was studied from January 2013 to August 2013. In this experiment, five sampling points inside the Ramsagar lake were selected and water quality parameters were analyzed fortnightly. Among different physico-chemical parameters, water temperature, dissolved oxygen, total alkalinity, total hardness, phosphate-phosphorus and concentration of Chlorophyll-a did not differ significantly except the water level and pH. A total of 29 species of plankton were recorded where phytoplankton comprised of 21 species and zooplankton comprised of 8 species. Chlorophyceae was found dominant throughout the study period followed by Bacillariophyceae, Cyanophyceae and Euglenophyceae. The highest plankton cell density was observed in the month of July and lowest plankton density was observed during the month of January. The study revealed that on the basis of physical, chemical, biological and environmental conditions the water of the lake was found to be suitable for survival of aquatic flora and fauna and also suitable for fish culture.J. Bangladesh Agril. Univ. 13(1): 145-152, June 2015

scholarly journals Comparative studies of exhaust emission from diesel engine fuelled with diesel fuel and B100 fuel

2017 ◽  
Vol 170 (3) ◽  
pp. 126-130
Author(s):  
Stanisław KRUCZYNSKI ◽  
Marcin ŚLĘZAK ◽  
Wojciech GIS ◽  
Andrzej ŻÓŁTOWSKI ◽  
Maciej GIS
Keyword(s):  
Carbon Monoxide ◽  
Diesel Engine ◽  
Vegetable Oils ◽  
Diesel Fuel ◽  
Comparative Studies ◽  
Exhaust Emission ◽  
Chemical Characteristics ◽  
Compression Ignition ◽  
Compression Ignition Engines ◽  
Physical Chemical

The article presents a comparative study of carbon monoxide, hydrocarbons, nitrogen oxides and the mass and number of particulate of diesel engine fulled with diesel and B100. B100 is a biofuel produced from vegetable oils for vehicles with compression-ignition engines. B100 fuel and diesel have similar physical-chemical characteristics which have been analyzed. The research was carried out on an engine dynamometer in four cycles: ESC, ETC, WHSC and WHTC. The article provides an analysis of the research results, preceded by a discussion of the test cycles used.

Sign in / Sign up

Export Citation Format

Share Document