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Wyświetlanie 1-15 z 34
Tytuł:
Principal Component Analysis of Egg Quality Characteristics of Isa Brown Layer Chickens in Nigeria
Autorzy:
Ukwu, H. O.
Abari, P. O.
Kuusu, D. J.
Powiązania:
https://bibliotekanauki.pl/articles/1178566.pdf
Data publikacji:
2017
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Correlation
Egg
Isa brown
Principal component
Quality
Opis:
This study was designed to provide an objective description of egg quality of Isa brown layer chickens in Nigeria. 104 eggs were used for the study. The eggs were initially weighed individually using a sensitive electronic weighing balance with accuracy of 0.001g. Data were collected on egg weight, egg length, egg width, oblong circumference, egg shell weight, yolk height, albumen height, albumen length, Haugh unit, albumen index and egg shell thickness. Data were subjected to principal component analysis. Egg quality traits had three principal components (factors) that contributed 85.805% of the total variability of the original eleven egg characteristics tested. The three principal components had Eigen values of 4.73 (PC1), 3.656 (PC2) and 1.069 (PC3). The first factor (PC1) accounted for 42.84% of the total variance, the second factor (PC2) accounted for 33.24% of the total variance, while the third factor (PC3) accounted for 9.72% of the total variance. The moderate to large communalities (0.583 – 0.944) observed indicate that a large number of variance has been accounted for by the factor solution. The present principal component analysis provided a means for objective description of the interdependence in the original eleven egg quality characteristics of Isa Brown layer chickens.
Źródło:
World Scientific News; 2017, 70, 2; 304-311
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of growth performance of common bean (Phaseolus vulgaris L.) genotypes during two phenological phases
Autorzy:
Gebeyehu, Yeshiwas Sendekie
Powiązania:
https://bibliotekanauki.pl/articles/1059435.pdf
Data publikacji:
2019
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Biomass yield
Correlation and Growth parameters
Phaseolus vulgaris
Opis:
Genotypic differences in biomass yield of many crops are mainly associated with variations in leaf area. Physiological growth analysis is the important in prediction of the performance of genotypes during plant growth. Therefore, the field experiment was conducted to study growth characteristics of common bean genotypes at Hawassa university agriculture research site. Three genotypes including Red Wolayita, Hawassa Deme and Ibado were evaluated in randomized complete block design with four replications during 2017 using irrigation. Growth analysis was done using primary data from two successive samplings in 20 days interval during linear vegetative growth stage and flowering stage. Growth parameters, specific leaf area (SLA), leaf area ratio (LAR), leaf area ratio (LAI), net assimilation rate (NAR), crop growth rate (CGR), relative growth rate (RGR) and biomass yield and their correlation were determined. The study result revealed that, Red Wollita had the highest specific leaf area (241.975 cm2 g-1) and leaf area ratio (161.36 cm2 g-1), Hawassa Deme had the highest net assimilation rate (27.5 mg dm-2 Day-1), leaf area index (1.35), relative growth rate (48.02 gg-1 day-1), average growth rate (0.1g day-1), crop growth rate (0.03g m-2 day-1) and biomass yield (2989.6 kg/ha). The ANOVA result indicated that, there was highly significant difference (p < 0.01) among genotypes for biomass yield. Correlation of major growth parameters with biomass yield was investigated. Biomass yield had positively highly correlated with net assimilation rate, absolute growth rate, relative growth rate and crop growth rate with correlation coefficient of (r = 0.39, 0.33, 0.42 and 0.56), respectively.
Źródło:
World Scientific News; 2019, 128, 2; 171-181
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Empirical assessment of efficiency of entropy source for random number generators using autocorrelation factor test
Autorzy:
Shreenabh, Moujesh Agrawal
Powiązania:
https://bibliotekanauki.pl/articles/1076114.pdf
Data publikacji:
2019
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Entropy
auto correlation factor test
cyber-security
randomness
Opis:
To achieve true randomness of numbers, the entropy source needs to be efficient. The statistical testing of efficiency of entropy source is necessary as it is used in random number generators for cryptography, simulation, statistical sampling, etc. 5000 numbers each were generated in four experimental entropy conditions: Control experiment with white light, Experimental conditions with multicoloured light with light path not disrupted, while light with path disrupted by thermocol balls, multicoloured light with path disrupted by thermocol balls. The numbers thus generated using each entropy condition were tested by Auto Correlation Factor Test to identify optimal experimental condition. The results were displayed in graphical and tabular format. The four graphs depicted the autocorrelations clearly showing that the best results were obtained for the fourth experimental condition ‘multicoloured light fan on’. It was found that Autocorrelation factor test is a powerful test for empirical assessment of efficiency of entropy source for random number generation. If the random number generator developed by any individual or organization is tested by Autocorrelation factor test, the efficiency of the entropy source can be pre-established thus preventing post hazards like hacking of random numbers. The security of data is a major concern in all areas such as defense, banking, research, designing and evaluation of examinations, etc.
Źródło:
World Scientific News; 2019, 117; 228-234
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Assessment of substituent effects on β-naphthyl based isoxazoles by IR and NMR spectra
Autorzy:
Thirunarayanan, G.
Sathiyendiran, V.
Arulkumarn, R.
Sundararrajan, R.
Manikandan, R.
Vanangamud, G.
Powiązania:
https://bibliotekanauki.pl/articles/1194022.pdf
Data publikacji:
2015
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Correlation analysis
IR spectra
NMR spectra
β-naphthyl dihydroisoxazoles
Opis:
A series containing thirteen 3-(2-naphthyl)-5-(substituted phenyl)-4,5-dihydroisoxazole have been synthesized and examined their purities by their data reported earlier. The characteristic infrared νC=N (cm-1) stretches, NMR chemical shifts (δ, ppm) of H4,4׳, H5 protons, C3-5 carbons were assigned and correlated with Hammett substituent constants and Swain-Lupton’s parameters using single and multi- regression analysis. From the results of regression analysis the effect of substituents on the spectral data have been studied.
Źródło:
World Scientific News; 2015, 9; 35-58
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Relationship between tourist accommodation establishments and natural environment in Eastern Region of Poland
Autorzy:
Gabryjończyk, Piotr
Kułaga, Katarzyna
Powiązania:
https://bibliotekanauki.pl/articles/1179511.pdf
Data publikacji:
2017
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Eastern Poland
accommodation
correlation
natural environment
occupancy rate
tourism
Opis:
Natural landscape features are considered to be one of the most significant factors determining spatial distribution of tourist traffic in case of long-term holidays. This type of vacations seems to be crucial for economic impact of the tourism, as tourism multiplier points out accommodation as services with largest further turnover. Perception of the natural environment may be very subjective, however some of its elements can be easily measured and compared, thus may be treated as a specific determinant having influence on tourism. Therefore the paper is an attempt to find a statistical relationship, measured by correlation, between the size of forests, protected areas and surface of inland waters, as well as their share in the overall area of administrative units, and the number of beds in tourist accommodation establishments and their occupancy rate in years 2012 and 2014. The research area was Eastern Region of Poland (by NUTS 1 classification), which covers Podlaskie, Lubelskie, Podkarpackie and Świętokrzyskie provinces. The advantage of such delimitation is an analysis of areas with inner landscape diversification, from lake sites and plains in the north, through uplands and low hills in the center, to mountains in the south. Moreover, this region is also famous for the presence of numerous and varied forms of nature conservation. In the paper statistical measures were used and the main source of data were databases of Central Statistical Office of Poland.
Źródło:
World Scientific News; 2017, 78; 376-382
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Structure parameter correlation of some quinoxaline derivatives through IR and 13C NMR spectra
Autorzy:
Thirunarayanan, G.
Muthuvel, I.
Sathiyendiran, V.
Powiązania:
https://bibliotekanauki.pl/articles/412003.pdf
Data publikacji:
2014
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Quinoxalines
IR spectra
NMR spectra
Hammett Correlation
substituent effects
Opis:
A series of 6-substituted quanoxaline derivatives have been synthesized and examined their purities by literature method. The infrared and 13>/Sup>C NMR spectral data of these quinoxalines were correlated with Hammett substituent constants, F and R parameters using single and multi-regression analysis. From the results of statistical analysis, the effect of substituents on the spectral frequencies has been studied.
Źródło:
International Letters of Chemistry, Physics and Astronomy; 2014, 19, 2; 198-207
2299-3843
Pojawia się w:
International Letters of Chemistry, Physics and Astronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
IR and NMR spectral studies of some 4-(6-methoxy-2-naphthyl)-5,6-dihydro-6-(substituted phenyl)-4H-1,3-oxazine-2-amines: Assessment of substituent effects
Autorzy:
Thirunarayanan, G.
Powiązania:
https://bibliotekanauki.pl/articles/412242.pdf
Data publikacji:
2014
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Oxazine-2-amines
IR spectra
NMR spectra
Hammett correlation
Substituent constans
Opis:
A series containing thirteen title compounds were synthesized and recorded IR and NMR spectra. The infrared νNH, C=N(cm-1)stretches, 1H NMR δNH, 13C NMR δC=N(ppm) chemical shifts of synthesized oxazine amines were assigned and correlated with Hammett substituent constants, F and R parameters. From the results of statistical analyses, the effect of substituents on the above spectral frequencies can be discussed.
Źródło:
International Letters of Chemistry, Physics and Astronomy; 2014, 4; 109-116
2299-3843
Pojawia się w:
International Letters of Chemistry, Physics and Astronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
IR and NMR spectral LFER study on 3-benzoicacid based sulfonamides
Autorzy:
Dineshkumar, Selvakumar
Thirunarayanan, Ganesamoorthy
Powiązania:
https://bibliotekanauki.pl/articles/1182898.pdf
Data publikacji:
2016
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
3-(substituted phenylsulfonamido)benzoic acids
ir and nmr spectra
correlation analysis
Opis:
A series containing nine 3-(substituted phenylsulfonamido)benzoicacids) have been synthesized and examined their purities by their data reported earlier. The characteristic infrared (NH, SO(as), SO(sym) and CO(as) cm-1) stretches, NMR chemical shifts (δ, ppm) of NH protons, CO carbons were assigned and correlated with Hammett substituent constants and Swain-Lupton’s parameters using single and multi-regression analysis. From
Źródło:
World Scientific News; 2016, 53, 3; 367-384
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Infrared and NMR spectral Hammett correlations in 4-(2-naphthyl)-5,6-dihydro-6-(substituted phenyl)-4H-1,3-oxazine-2-amines
Autorzy:
Thirunarayanan, G.
Pazhamalai, S.
Sekar, K. G.
Powiązania:
https://bibliotekanauki.pl/articles/411654.pdf
Data publikacji:
2014
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Oxazine-2-amines
IR and NMR spectra
Hammett equation
Correlation analysis
Opis:
A series containing ten titled compounds have been synthesised and recorded the IR and NMR spectra. From the spectra the infrared νNH, C=N, C-O-C stretches, NMR chemical shifts of (δ, ppm) NH and C=N were assigned and correlated with Hammett substituent constants, F and R parameters using single regression analysis. From the results, the effects of substituent on the above spectral frequencies were discussed.
Źródło:
International Letters of Chemistry, Physics and Astronomy; 2014, 8; 38-46
2299-3843
Pojawia się w:
International Letters of Chemistry, Physics and Astronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Synthesis, spectral correlations and biological activities of some (E)-[4-(substituted benzylidene amino)phenyl] (phenyl) methanones
Autorzy:
Mayavel, P.
Thirumurthy, K.
Dineshkumar, S.
Thirunarayanan, G.
Powiązania:
https://bibliotekanauki.pl/articles/412136.pdf
Data publikacji:
2014
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Schiff's bases
fly-ash
PTS
IR spectra
NMR spectra
Hammett correlation
Opis:
A series of Schiff’s bases have been synthesized by fly-ash:p-toluenesulfonic acid (fly-ash:PTS) catalyzed microwave assisted oxidative coupling of arylamines and substituted benzaldehydes under solvent-free condition. The synthesized Schiff’s bases are characterized by their physical constants, analytical and spectroscopic data. The group frequencies of imines such as IR (v, cm–1) and NMR (δ, ppm) spectral data was correlated with Hammett substituent constants, F and R parameters using single and multi-linear regression analysis. The antimicrobial activities of these Schiff’s bases have been studied using Bauer-Kirby method.
Źródło:
International Letters of Chemistry, Physics and Astronomy; 2014, 20, 2; 145-159
2299-3843
Pojawia się w:
International Letters of Chemistry, Physics and Astronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Relationship between Length and Mouth Opening of Skipjack Tuna (Katsuwonus pelamis) in the Waters of Palabuhanratu Sukabumi Regency
Autorzy:
Ridwan, Monika
Khan, Alexander M. A.
Zahidah, Zahidah
Hamdani, Herman
Powiązania:
https://bibliotekanauki.pl/articles/1031887.pdf
Data publikacji:
2020
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Katsuwonus pelamis
Palabuhanratu waters
correlation value
length-mouth opening relationship
skipjack tuna
Opis:
Skipjack tuna (Katsuwonus pelamis (Linnaeus, 1758)) is one of the main commodities of Palabuhanratu capture fisheries with a percentage of 14% or 422.701 kg of total capture fisheries production in 2017. The purpose of this research is to analyze the correlation between length and mouth opening of skipjack tuna (Katsuwonus Pelamis) in the waters of Palabuhanratu Sukabumi Regency. The sample was collected in June until August 2019 at the Palabuhanratu Fishing Port, Sukabumi Regency. Skipjack tuna observed during the research had a total length range from 250 until 730 mm FL. The pattern of length and opening mouth relationships of skipjack tuna can be seen from the regression and correlation values. The results obtained were collected combined Y = 0.8064x - 0.2283 and R2 = 0.7786. Correlation value of the length and mouth opening relationship of skipjack tuna was 0.88. The level of length-mouth opening relationship of skipjack tuna is highly interrelated.
Źródło:
World News of Natural Sciences; 2020, 30, 2; 220-231
2543-5426
Pojawia się w:
World News of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Synthesis and Hammett spectral correlation studies of some substituted cyanopyridine compounds
Autorzy:
Arulkumaran, R.
Manikandan, V.
Thirunarayanan, G.
Powiązania:
https://bibliotekanauki.pl/articles/1179260.pdf
Data publikacji:
2017
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Hammett constants
IR and NMR spectra
Single and multi-correlation analysis
Substituted cyanopyridine
Opis:
About ten substituted cyanopyridine compounds have been synthesized and the purities of these pyridines were examined with their physical constants, analytical and spectroscopic data provided in the literature. They are characteristic infrared stretches and NMR chemical shifts were assigned and they are correlated with Hammett substituent constants using single and multi-linear regression analysis. From the results, the effect of substituents on the spectral data of cyanopyridine has been discussed.
Źródło:
World Scientific News; 2017, 80; 239-255
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Studies on some physico-chemical parameters of cyanophycean members and correlation coefficient of eutrophic ponds in Chidambaram, Tamil Nadu, India
Autorzy:
Elayaraj, B.
Selvaraju, M.
Powiązania:
https://bibliotekanauki.pl/articles/10938.pdf
Data publikacji:
2014
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
physicochemical parameter
phytoplankton
correlation coefficient
eutrophic pond
pond
Chidambaram town
Tamil Nadu
India
Opis:
The present study deals with the statistical analysis of physico-chemical parameters and cyanophycean members of two pond water quality of Chidambaram, Cuddalore district (Tamil Nadu). The qualities of pond water were analyzed for six months. Eleven important parameters were included in statistical analysis. The qualities of pond water have been assessed by calculating mean, standard deviation and correlation coefficient. Correlation studies of hydrobiology with physico-chemical parameters revealed that the relationship between phytoplankton density in general and that of the specific groups are highly complex and often controlled by interactions of different factors. In the both pond water the correlation coefficient test revealed that cyanophycean members positively correlated with temperature, pH, CO2, alkalinity, hardness, nitrate, BOD and COD at 1 % and 5 % level significant, where as it is negatively correlated with acidity and dissolved oxygen. In the present study it can be concluded that the cyanophycean members are highly tolerant organisms. They prefer to grow at higher temperatures and in highly alkaline, BOD and COD waters. Hence they can with stand high levels of contaminated waters of Thillai Kali Kovil pond, when compared to Ilamiyakkinar Kovil pond.
Źródło:
International Letters of Natural Sciences; 2014, 11, 2
2300-9675
Pojawia się w:
International Letters of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
IR & NMR spectral studies of some 7-substituted 9H-fluorenacyl bromides: Assessment of substituent effects
Autorzy:
Thirunarayanan, G.
Powiązania:
https://bibliotekanauki.pl/articles/412017.pdf
Data publikacji:
2013
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
9H-Fluorenacyl bromides
IR and NMR spectra
Hammett substituent constants
Correlation analysis
Opis:
A series of some 2-bromo-1-(2-substituted 9H-fluorene-7-yl)ethanones have been prepared. The purities of these ethanones have been checked by their physical constants and spectroscopic data. The spectral group frequencies of these enones have been assigned and correlated with Hammett substituent constants, F and R parameters. From the results of statistical analyses, the effects of substituent have been discussed.
Źródło:
International Letters of Chemistry, Physics and Astronomy; 2013, 9, 2; 152-161
2299-3843
Pojawia się w:
International Letters of Chemistry, Physics and Astronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Hammett spectral correlations in some aryl 1,3-oxazine-4-thione derivatives
Autorzy:
Thirunarayanan, G.
Sekar, K. G.
Powiązania:
https://bibliotekanauki.pl/articles/412394.pdf
Data publikacji:
2014
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
1,3-oxazine-4-thiones
IR spectra
13C NMR spectra
Hammett correlation
Opis:
A series of some aryl 1,3-oxazine-4-thione derivatives have been synthesized by 1-methyl imidazole catalyzed three component one pot synthetic method in room temperature. The purities of these thiones were studied by their physical constants and spectroscopic data. The infrared and 13C NMR spectral data of CN and CS were correlated with Hammett substituent constants, F and R parameters using single and multi-linear regression analysis. From the results of statistical analysis, the effect of substituent on the spectral data was studied.
Źródło:
International Letters of Chemistry, Physics and Astronomy; 2014, 17, 2; 193-200
2299-3843
Pojawia się w:
International Letters of Chemistry, Physics and Astronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 34

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