scholarly journals Hydrochemical differentiation of selected reservoirs in Carpathian Mts. and Eastern European Lowland

2020 ◽  
Vol 93 (1) ◽  
pp. 121-133
Author(s):  
Małgorzata Kijowska-Strugała ◽  
Łukasz Wiejaczka ◽  
Irina Grigoryeva ◽  
Aleksey Komissarov
Keyword(s):  
Chemical Composition ◽  
Physicochemical Parameters ◽  
High Water ◽  
Study Data ◽  
Summer Season ◽  
Eastern European ◽  
Hydrochemical Parameters ◽  
Lowland Reservoirs ◽  
The Individual ◽  
Artificial Reservoirs

The aim of the analysis was to compare physicochemical parameters and chemical composition of two groups of artificial reservoirs, mountain and lowland ones, characterised by different parameters and functions. Three mountain artificial reservoirs (Klimkówka, Dobczyce, Czorsztyn) located in the Upper Vistula basin (Carpathian Mountains in Poland) and three lowland reservoirs (Ivankovo, Verhnevolzhskoye, Vyshnevolotzkoye) located in the Upper Volga basin (Eastern European Lowland in Russia) were selected for the study. Data for the summer season in 2009-2013 were used in the analysis. Mountain reservoirs display high water concentrations of sulphates, chlorides and biogenic nitrates, and lower concentrations of ammonium and oxygen indicator in relation to lowland reservoirs. Similar concentrations of phosphates were noticed in both the mountain and the lowland reservoirs. The hydrochemical differentiation between the individual mountain reservoirs was small, and statistically significant differences only occurred for SEC. Greater differentiation of the hydrochemical parameters was found among the lowland reservoirs. Statistically significant differences were demonstrated with regard to SEC, Cl- and NO3-.

scholarly journals Changes of Physicochemical Properties of Starch Syrups Recommended for Winter Feeding of Honeybees during Storage

Agriculture ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 374
Author(s):  
Teresa Szczęsna ◽  
Ewa Waś ◽  
Piotr Semkiw ◽  
Piotr Skubida ◽  
Katarzyna Jaśkiewicz ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Physicochemical Properties ◽  
Physicochemical Parameters ◽  
Storage Temperature ◽  
Storage Conditions ◽  
Different Temperatures ◽  
And Storage ◽  
Bee Colonies ◽  
Temperature Time ◽  
Winter Feeding

The aim of this study was to determine the influence of storage temperature and time on physicochemical parameters of starch syrups recommended for the winter feeding of bee colonies. The studies included commercially available three starch syrups and an inverted saccharose syrup that were stored at different temperatures: ca. 20 °C, 10–14 °C, and ca. 4 °C. Physicochemical parameters of fresh syrups (immediately after purchase) and syrups after 3, 6, 9, 12, 15, 18, 21, and 24 months of storage at the abovementioned temperatures were measured. It was observed that the rate of unfavorable changes in chemical composition of starch syrups and the inverted saccharose syrup, mainly the changes in the 5-hydroxymethylfurfural (HMF) content, depended on the type of a syrup and storage conditions (temperature, time). Properties of tested starch syrups intended for winter feeding of bees stored at ca. 20 °C maintained unchanged for up to 6 months, whereas the same syrups stored at lower temperatures (10–14 °C) maintained unchanged physicochemical parameters for about 12 months. In higher temperatures, the HMF content increased. To date, the influence of this compound on bees has not been thoroughly investigated.

Apis mellifera vs Melipona beecheii Cuban polifloral honeys: A comparison based on their physicochemical parameters, chemical composition and biological properties

LWT ◽  
2018 ◽  
Vol 87 ◽  
pp. 272-279 ◽  
Author(s):  
José M. Alvarez-Suarez ◽  
Francesca Giampieri ◽  
Andrea Brenciani ◽  
Luca Mazzoni ◽  
Massimiliano Gasparrini ◽  
...  
Keyword(s):  
Apis Mellifera ◽  
Chemical Composition ◽  
Physicochemical Parameters ◽  
Biological Properties ◽  
Melipona Beecheii

scholarly journals COMBINING DATA-DRIVEN AND NUMERICAL MODELLING APPROACHES TO STORM EROSION PREDICTION

2020 ◽  
pp. 38
Author(s):  
Joshua Simmons ◽  
Kristen Splinter
Keyword(s):  
Numerical Models ◽  
Individual Performance ◽  
Study Data ◽  
Data Driven ◽  
Erosion Prediction ◽  
Trade Offs ◽  
Combining Data ◽  
Erosion Models ◽  
Using Data ◽  
The Individual

Physics-based numerical models play an important role in the estimation of storm erosion, particularly at beaches for which there is little historical data. However, the increasing availability of pre-and post-storm data for multiple events and at a number of beaches around the world has opened the possibility of using data-driven approaches for erosion prediction. Both physics-based and purely data-driven approaches have inherent strengths and weaknesses in their ability to predict storm-induced erosion. It is vital that coastal managers and modelers are aware of these trade-offs as well as methods to maximise the value from each modelling approach in an increasingly data-rich environment. In this study, data from approximately 40 years of coastal monitoring at Narrabeen-Collaroy Beach (SE Australia)has been used to evaluate the individual performance of the numerical erosion models SBEACH and XBeach, and a data-driven modelling technique. The models are then combined using a simple weighting technique to provide a hybrid estimate of erosion.Recorded Presentation from the vICCE (YouTube Link): https://youtu.be/v53dZiO8Y60

scholarly journals Hygroscopicity and composition of Alaskan Arctic CCN during April 2008

2011 ◽  
Vol 11 (8) ◽  
pp. 21789-21834
Author(s):  
R. H. Moore ◽  
R. Bahreini ◽  
C. A. Brock ◽  
K. D. Froyd ◽  
J. Cozic ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Cloud Condensation Nuclei ◽  
Anthropogenic Pollution ◽  
Organic Aerosol ◽  
International Polar Year ◽  
Mass Spectral ◽  
Aerosol Mass ◽  
Alaskan Arctic ◽  
Air Mass Types ◽  
The Individual

Abstract. We present a comprehensive characterization of cloud condensation nuclei (CCN) sampled in the Alaskan Arctic during the 2008 Aerosol, Radiation, and Cloud Processes affecting Arctic Climate (ARCPAC) project, a component of the POLARCAT and International Polar Year (IPY) initiatives. Four distinct air mass types were sampled including relatively pristine Arctic background conditions as well as biomass burning and anthropogenic pollution plumes. Despite differences in chemical composition, inferred aerosol hygroscopicities were fairly invariant and ranged from κ = 0.1–0.3 over the atmospherically-relevant range of water vapor supersaturations studied. Analysis of the individual mass spectral m/z 43 and 44 peaks from an aerosol mass spectrometer show the organic aerosols sampled to be well-oxygenated, consistent with with long-range transport and aerosol aging processes. However, inferred hygroscopicities are less than would be predicted based on previous parameterizations of biogenic oxygenated organic aerosol, suggesting an upper limit on organic aerosol hygroscopicity above which κ is less sensitive to the O:C ratio. Most Arctic aerosol act as CCN above 0.1 % supersaturation, although the data suggest the presence of an externally-mixed, non-CCN-active mode comprising approximately 0–20 % of the aerosol number. CCN closure was assessed using measured size distributions, bulk chemical composition measurements, and assumed aerosol mixing states; CCN predictions tended toward overprediction, with the best agreement (± 0–20 %) obtained by assuming the aerosol to be externally-mixed with soluble organics. Closure also varied with CCN concentration, and the best agreement was found for CCN concentrations above 100 cm−3 with a 1.5- to 3-fold overprediction at lower concentrations.

scholarly journals CCN activity of organic aerosols observed downwind of urban emissions during CARES

2013 ◽  
Vol 13 (4) ◽  
pp. 9355-9399 ◽  
Author(s):  
F. Mei ◽  
A. Setyan ◽  
Q. Zhang ◽  
J. Wang
Keyword(s):  
Chemical Composition ◽  
Water Solubility ◽  
Volume Fraction ◽  
Field Studies ◽  
High Water ◽  
Carbonaceous Aerosols ◽  
Mass Spectral ◽  
Least Squares Fit ◽  
The Relationship ◽  
Aerosol Chemical Composition

Abstract. During the Carbonaceous Aerosols and Radiative Effects Study (CARES), activation fraction of size-resolved aerosol particles and aerosol chemical composition were characterized at the T1 site (~60 km downwind of Sacramento, California) from 10 June to 28 June 2010. The hygroscopicity of CCN-active particles (κCCN) with diameter from 100 to 171 nm, derived from the size-resolved activated fraction, varied from 0.10 to 0.21, with an average of 0.15, which was substantially lower than that proposed for continental sites in earlier studies. The low κCCN value was due to the high organic volume fraction, averaged over 80% at the T1 site. The derived κCCN exhibited little diurnal variation, consistent with the relatively constant organic volume fraction observed. At any time, over 90% of the size selected particles with diameter between 100 and 171 nm were CCN active, suggesting most particles within this size range were aged background particles. Due to the large organic volume fraction, organic hygroscopicity (κorg) strongly impacted particle hygroscopicity and therefore calculated CCN concentration. For vast majority of the cases, an increase of κorg from 0.03 to 0.18, which are within the typical range, doubled the calculated CCN concentration. Organic hygroscopicity was derived from κCCN and aerosol chemical composition, and its variations with the fraction of total organic mass spectral signal at m/z 44 (f44) and O : C were compared to results from previous studies. Overall, the relationships between κorg and f44 are quite consistent for organic aerosol (OA) observed during field studies and those formed in smog chamber. Compared to the relationship between κorg and f44, the relationship between κorg and O : C exhibits more significant differences among different studies, suggesting κorg may be better parameterized using f44. A least squares fit yielded κorg = 2.04 (± 0.07) × f44 − 0.11 (± 0.01) with the Pearson R2 value of 0.71. One possible explanation for the stronger correlation between κorg and f44 is that the m/z 44 signal (mostly contributed by the CO2+ ion) is more closely related to organic acids, which may dominate the overall κorg due to their relatively high water solubility and hygroscopicity.

scholarly journals Characteristics of Sustainable Bioeconomy in the CEE Macro-region

2018 ◽  
Vol 27 (5) ◽  
pp. 5-26 ◽  
Author(s):  
Viktória Vásáry ◽  
Dorottya Szabó
Keyword(s):  
Triple Helix ◽  
Food Industry ◽  
Research Area ◽  
Sustainable Growth ◽  
Eastern European ◽  
Strategic Research ◽  
Knowledge Based ◽  
Research And Innovation ◽  
Transnational Cooperation ◽  
The Individual

In the coming decades to achieve further progress in sustainable growth of agriculture, aquaculture, forestry and food industry in the CEE countries there is a need to face specific challenges through the lens of bioeconomy, thus by shifting the emphasis to research, innovation and transnational cooperation for knowledge-based development. A shared strategic research and innovation framework that has already been offered by the Central-Eastern European Initiative for Knowledge-based Agriculture, Aquaculture and Forestry in the Bioeconomy, i.e. by the BIOEAST Initiative might enable these countries to work towards the development of a sustainable bioeconomy while effectively joining the European Research Area. The study is aimed at conceptualizing bioeconomy, analysing key socio-economic indicators of the ‘BIOEAST countries’ bioeconomy and describing the implications for policymakers based on the results of the ‘BIOEAST Bioeconomy Capacity Building Survey’. Based on the results of the survey the major findings of the research verify and strengthen the objectives of the BIOEAST Initiative. The individual results of the survey in terms of major bottlenecks in the supply chain, missing elements hindering competitiveness, the opportunities to raise competitiveness and functions of the intervention system led to the conclusion that the creation of sustainable bioeconomy explicitly requires triple-helix stakeholders to find efficient collaboration mechanisms and build synergies.

scholarly journals PENGARUH FAKTOR INDIVIDU DAN FAKTOR ORGANISASI TERHADAP KOMITMEN ORGANISASI (Studi pada Guru SMAN di Kecamatan Labuapi Kabupaten Lombok Barat)

2015 ◽  
Vol 4 (3) ◽  
Author(s):  
Muhammad Irfan
Keyword(s):  
Organizational Commitment ◽  
Organizational Factors ◽  
Study Data ◽  
Individual Factors ◽  
Individual Factor ◽  
Collection Method ◽  
Great Expectations ◽  
School Activities ◽  
The Individual ◽  
Multipleregression Analysis

A number of teachers are found unenergetic and undisciplined because of some reasons, suchas no appreciation of they did at work, exclusion of school activities, no trust from the school leaders,no proper treatment in terms of promotion. All of these problems happen among teachers of LabuapiHigh School of West Lombok Regency. This study aims to investigate the significant influence ofindividual and organizational factors, either simultaneously or partially, on the teachers’Organizational Commitment.This research is categorized as an associative study. The population encompassed all 70 highschool teachers in Labuapi Distric of West Lombok Regency. These teachers were all taken assamples of the study. Data collection method involved the use of a questionnaire containingquestions about the Individual Factors, Organizational Factors, and Organizational Commitment.The data were analyzed using Multiple Linear Regression Analysis.Results of the study indicate that the Individual and Organizational Factors simultaneouslyand partially had a significant effect on the dependent variable of Organizational Commitment. Themost dominant variable affecting Organizational commitment was the individual factor. This studyrecommends that principals of High Schools in Labuapi District of West Lombok constantly meetteachers' great expectations towards work appreciation, involve them emotionally in work-relatedactivities, nurture teacher's responsibility to work, develop a sense of pride for the teachers, providethem with more education training and pastoral care for students, increase the amount of free time togather with family, and reduce the pressure in both career and family matters.Keywords: Individual Factors, Organizational Factors, Organizational Commitment, MultipleRegression Analysis.

scholarly journals Examination of Cognitive Flexibility Levels of Young Individual and Team Sport Athletes

2018 ◽  
Vol 6 (8) ◽  
pp. 149 ◽  
Author(s):  
Şehmus Aslan
Keyword(s):  
High School Students ◽  
Cognitive Flexibility ◽  
Female Athletes ◽  
Team Sports ◽  
Team Sport ◽  
Study Data ◽  
Validity And Reliability ◽  
School Students ◽  
The Individual ◽  
Individual Sports

The purpose of this study was to compare the level of cognitive flexibility of individual and team athletes who are students. The study included a total of 237 volunteer athletes, comprising 140 males (59.1%) and 97 females (40.9%) with a mean age of 18.98 ± 2.18 years (range, 16-26 years) who were licensed to participate in individual and team sports. Study data were collected using the Cognitive Flexibility Scale developed by Martin and Rubin (1995), which consists of 12 items in total. International validity and reliability studies were conducted by Martin and Rubin, and Turkish validity and reliability studies were conducted by Çelikkaleli on high school students (Çelikkaleli, 2014). The scores of the Cognitive Flexibility Scale were found to be higher in the team sports athletes compared with the individual sports athletes (p<0.05). No difference was determined between the levels of cognitive flexibility in male and female athletes. The results indicated that the cognitive flexibility levels of team athletes are higher than those of individual athletes.

scholarly journals Phenoconversion of Cytochrome P450 Metabolism: A Systematic Review

2020 ◽  
Vol 9 (9) ◽  
pp. 2890 ◽  
Author(s):  
Sylvia D. Klomp ◽  
Martijn L. Manson ◽  
Henk-Jan Guchelaar ◽  
Jesse J. Swen
Keyword(s):  
Systematic Review ◽  
Cytochrome P450 ◽  
Study Data ◽  
Inclusion Criteria ◽  
Extrinsic Factors ◽  
Related Factors ◽  
Genotype Group ◽  
The Individual ◽  
Cancer And Inflammation ◽  
The Impact

Phenoconversion is the mismatch between the individual’s genotype-based prediction of drug metabolism and the true capacity to metabolize drugs due to nongenetic factors. While the concept of phenoconversion has been described in narrative reviews, no systematic review is available. A systematic review was conducted to investigate factors contributing to phenoconversion and the impact on cytochrome P450 metabolism. Twenty-seven studies met the inclusion criteria and were incorporated in this review, of which 14 demonstrate phenoconversion for a specific genotype group. Phenoconversion into a lower metabolizer phenotype was reported for concomitant use of CYP450-inhibiting drugs, increasing age, cancer, and inflammation. Phenoconversion into a higher metabolizer phenotype was reported for concomitant use of CYP450 inducers and smoking. Moreover, alcohol, pregnancy, and vitamin D exposure are factors where study data suggested phenoconversion. The studies reported genotype–phenotype discrepancies, but the impact of phenoconversion on the effectiveness and toxicity in the clinical setting remains unclear. In conclusion, phenoconversion is caused by both extrinsic factors and patient- and disease-related factors. The mechanism(s) behind and the extent to which CYP450 metabolism is affected remain unexplored. If studied more comprehensively, accounting for phenoconversion may help to improve our ability to predict the individual CYP450 metabolism and personalize drug treatment.

scholarly journals Structural features of complex hydrochemical systems

2019 ◽  
Vol 127 ◽  
pp. 02029
Author(s):  
Olga Shevtsova
Keyword(s):  
Collective Behavior ◽  
Information Technologies ◽  
System Analysis ◽  
Regression Line ◽  
Mathematical Expression ◽  
Structural Features ◽  
Time Variability ◽  
Hydrochemical Parameters ◽  
Scale Range ◽  
The Individual

The set of non-conservative hydrochemical parameters is considered as a complex system, which displays collective behavior. It is found that the collective behavior is described by the power relation between the time variability (the standard deviations) and the average concentrations of different hydrochemical parameters in the scale range 100 – 0:0001 mg/kg. The exponent can be 0:7 – 0:9. Power law scaling is the mathematical expression of self similarity and fractality. The complex systems of nonconservative chemical parameters have a structure that can be characterized by exponent, normalization coefficient, standard error, correlation coefficient, and by sharp deviations of the individual parameters from the regression line and from the most probable average and standard deviation values, if any. It is shown with specific examples that changes in the hydrochemical systems structure are the result of the manifestation of biogeochemical processes and the dynamics of water. Regression analysis of collective behavior of complex hydrochemical systems is one of the examples of the use of modern information technologies based on the methods of system analysis.

Sign in / Sign up

Export Citation Format

Share Document