CANADIAN LINSEED: I. THE EFFECT OF VARIETY AND ENVIRONMENT ON THE COMPOSITION OF LINSEED

1944 ◽  
Vol 22f (5) ◽  
pp. 119-131
Author(s):  
H. R. Sallans
Keyword(s):  
Iodine Value ◽  
Oil Content ◽  
Partial Correlation ◽  
Correlation Coefficients ◽  
Kernel Weight ◽  
Refractive Indices ◽  
Residual Variance ◽  
Property A ◽  
Level Of Significance ◽  
Common Association

Data for oil content, nitrogen, iodine value, 1000-kernel weight, and refractive indices of extracted and expressed oil were determined on three varieties of flax, i.e. Bison, Royal, and Redwing, grown at 35 stations in Saskatchewan. Varietal differences were demonstrated for all properties with the exception of total nitrogen, and significant differences were obtained for all properties due to the effect of environment.Within varieties, highly significant simple correlation coefficients were obtained between iodine value (Hanus) and refractive indices of both expressed and extracted oils. Analysis of residual variance showed that varietal regressions did not differ significantly and prediction equations applicable with equal validity to all three varieties could be derived. Partial correlation coefficients, independent of nitrogen, indicate that these associations are independent of the latter property. A significant association (r =.497**) between oil content and 1000-kernel weight proved to be due to common association of these properties with total nitrogen.A simple intravarietal correlation coefficient of r = −.817** was obtained between nitrogen and oil content. Analysis of residual variance indicated that varietal regressions did not differ in slope and that on the average an increase of 1% in nitrogen was associated with a decrease of 2.45% in oil content. Oil content may be estimated with a standard error of ± 0.57% from the equation, oil content = −2.54 nitrogen + A, where A is a varietal constant.** Indicates that the 1% level of significance was attained.

CANADIAN SUNFLOWER SEED.: I. BUSHEL WEIGHT AS A FACTOR IN GRADING

1945 ◽  
Vol 23f (2) ◽  
pp. 91-103
Author(s):  
H. R. Sallans ◽  
M. Berenbom ◽  
R. K. Larmour
Keyword(s):  
Refractive Index ◽  
Full Advantage ◽  
Iodine Value ◽  
Sunflower Seed ◽  
Oil Content ◽  
Correlation Coefficients ◽  
Acid Value ◽  
Oil Yield ◽  
Level Of Significance ◽  
Total Oil

To determine the importance of bushel weight as a factor in grading, 51 samples of Sunrise and 34 samples of Mennonite seed were examined for associations between bushel weight and other properties of commercial sunflower seed.Highly significant correlations of bushel weight with total oil content of the seed, r =.867**; percentage kernel, r =.740**; percentage oil in the kernel, r =.795**; and percentage nitrogen in the kernels, r = −.467** were obtained. Oil yield, estimated on the basis of a cake containing 5% oil and 10% moisture, was also associated with bushel weight, r =.871**. The correlation coefficients of bushel weight with iodine value, acid value, and refractive index were not significant.The present grade specifications fail to take full advantage of bushel weight as a factor in grading sunflower seed since the levels were set too low to be effective. It is suggested that the levels might well be 30 lb. for No. 1, 26 lb. for No. 2, and 22 lb. for No. 3 instead of 24 lb. for No. 1 and 21 lb. for No. 2 and No. 3. The effects of this change are discussed in relation to grading of the two varieties and the establishment of appropriate price spreads between grades.** Indicates that the 1% level of significance was attained.

CANADIAN LINSEED: II. RELATIONS BETWEEN IODINE VALUE AND FATTY ACID COMPOSITION OF LINSEED OIL

1944 ◽  
Vol 22f (5) ◽  
pp. 132-145 ◽  
Author(s):  
H. R. Sallans ◽  
G. D. Sinclair
Keyword(s):  
Oleic Acid ◽  
Linoleic Acid ◽  
Linolenic Acid ◽  
Iodine Value ◽  
Linseed Oil ◽  
Correlation Coefficients ◽  
Regression Coefficients ◽  
Total Correlation ◽  
Saponifiable Matter ◽  
Level Of Significance

Analyses were made for non-saponifiable matter, iodine value, thiocyanogen value, and saturated acids on 54 samples of linseed oil from three varieties of flax grown in Saskatchewan. From these data the percentages of oleic, linoleic, and linolenic acids in the oils were computed. Analysis of variance showed that varietal differences exist for all these properties with the exception of non-saponifiable matter, and environmental effects cause significant differences in all properties.Highly significant total correlation coefficients were obtained between iodine value and:—thiocyanogen value, r =.962**; saturated acids, r = −.596**; unsaturated acids, r =.692**; oleic acid, r = −.912**; and linolenic acid, r =.940**. Relations between iodine value and thiocyanogen value, linolenic acid, linoleic acid, and oleic acid proved to be homogeneous with respect to regression coefficients and centroids. From these relations the following prediction equations wrere derived:Thiocyanogen value = 0.44 iodine value + 38.59 (S.e. = 0.63 units);Linolenic acid, % = 0.49 iodine value − 37.93 (S.e. = 0.88%);Linoleic acid, % = 0.055 iodine value + 0.73 (S.e. = 1.80%);Oleic acid, % = −0.48 iodine value + 113.08 (S.e. = 1.06%).** Indicates that the 1% level of significance was attained.

scholarly journals The First National Survey of Cadmium in Cacao Farm Soil in Colombia

Agronomy ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 761
Author(s):  
Daniel Bravo ◽  
Clara Leon-Moreno ◽  
Carlos Alberto Martínez ◽  
Viviana Marcela Varón-Ramírez ◽  
Gustavo Alfonso Araujo-Carrillo ◽  
...  
Keyword(s):  
Graphical Models ◽  
Partial Correlation ◽  
National Level ◽  
Prediction Method ◽  
Correlation Coefficients ◽  
Predictive Performance ◽  
Nationwide Survey ◽  
Critical Discussion ◽  
Cadmium Content ◽  
Soil Variables

This study represents the first nationwide survey regarding the distribution of Cd content in cacao-growing soils in Colombia. The soil Cd distribution was analyzed using a cold/hotspots model. Moreover, both descriptive and predictive analytical tools were used to assess the key factors regulating the Cd concentration, considering Cd content and eight soil variables in the cacao systems. A critical discussion was performed in four main cacao-growing districts. Our results suggest that the performance of a model using all the variables will always be superior to the one using Zn alone. The analyzed variables featured an appropriate predictive performance, nonetheless, that performance has to be improved to develop a prediction method that might be used nationwide. Results from the fitted graphical models showed that the largest associations (as measured by the partial correlation coefficients) were those between Cd and Zn. Ca had the second-largest partial correlation with Cd and its predictive performance ranked second. Interestingly, it was found that there was a high variability in the factors correlated with Cd in cacao growing soils at a national level. Therefore, this study constitutes a baseline for the forthcoming studies in the country and should be reinforced with an analysis of cadmium content in cacao beans.

SERUM GONADOTROPHINS, TESTOSTERONE AND SPERMATOGENESIS IN SUBFERTILE MEN

1977 ◽  
Vol 86 (3) ◽  
pp. 651-658 ◽  
Author(s):  
J. H. Aafjes ◽  
J. C. M. van der Vijver ◽  
R. Docter ◽  
P. E. Schenck
Keyword(s):  
Partial Correlation ◽  
Sperm Count ◽  
Correlation Coefficients ◽  
Serum Levels ◽  
Significant Negative Correlation ◽  
The Other ◽  
Sperm Production ◽  
Positive Correlation ◽  
Natural Logarithm ◽  
Biopsy Score

ABSTRACT In 210 subfertile men there existed a significant positive correlation between serum FSH and LH (0.41). No correlation was observed between the gonadotrophin levels and testosterone. In contrast to this FSH as well as LH were negatively correlated with the natural logarithm (In) of the sperm count/ml ejaculate (−0.44 and −0.18, respectively). When the positive correlation which existed between FSH and LH was used to calculate partial correlation coefficients, the coefficient between FSH and ln sperm count did hardly change (−0.41) the coefficient between LH and ln sperm count on the other hand became insignificant (−0.05). This suggests that spermatogenesis influences FSH serum levels in subfertile men by a decreased suppression when sperm production is diminished. Testicular biopsies taken from 97 of these patients were used to determine biopsy scores. These scores showed a significant negative correlation with FSH (−0.34) and a positive one with ln sperm count/ml ejaculate (0.45). Interestingly the biopsy score of 16 patients who fertilized their wives, was found to be higher compared with the score of the other patients who did not fertilize. The number of sperm/ml ejaculate and the FSH values of these 2 groups of biopsied patients were, however, not significantly different. This leads to the conclusion that the biopsy score is a better parameter for the evaluation of oligospermic men than either sperm count or FSH serum values.

scholarly journals Pre-service Science and Mathematics Teachers’ Teaching Efficacy Beliefs and Attitudes toward Teaching: A Partial Correlation Research

2020 ◽  
Vol 45 (9) ◽  
pp. 42-61
Author(s):  
Busra Kartal ◽  
Keyword(s):  
Mathematics Teachers ◽  
Elementary Science ◽  
Partial Correlation ◽  
Correlation Coefficients ◽  
Efficacy Beliefs ◽  
Positive Attitudes ◽  
And Mathematics ◽  
High Level ◽  
Science And Mathematics Teachers ◽  
Beliefs And Attitudes

Teachers with a high level of self-efficacy and positive attitudes are more likely to use new and constructivist approaches and to create a learning environment in which students may develop 21st-century skills. Examining pre-service teachers’ attitudes and beliefs related to teaching allow teacher preparation programs to evaluate their effectiveness on beliefs and attitudes. This correlational research investigated pre-service elementary science and mathematics teachers’ beliefs and attitudes due to gender, grade level, and department, and revealed the reliable correlation between beliefs and attitudes performing partial correlation. Results show that females feel more efficacious in teaching and have more positive attitudes than males. 4th grades also perceive a higher level of efficacy for student engagement and using instructional strategies than 1st grades. Partial correlation coefficients revealed positive strong relationships between attitudes and efficacy beliefs. Recommendations are suggested based on implications.

scholarly journals Dendroclimatic Response Variability of Quercus species in the Romanian Intensive Forest Monitoring Network

2013 ◽  
Vol 41 (1) ◽  
pp. 326 ◽  
Author(s):  
Ionel POPA ◽  
Stefan LECA ◽  
Adam CRĂCIUNESCU ◽  
Cristian SIDOR ◽  
Ovidiu BADEA
Keyword(s):  
Correlation Coefficients ◽  
Monitoring Network ◽  
Point Of View ◽  
Forest Monitoring ◽  
Permanent Plots ◽  
Intensive Monitoring ◽  
Level Ii ◽  
Quercus Species ◽  
Level Of Significance ◽  
Broad Leaved Species

Oaks are among the most important broad-leaved species in Romanian forests from both an economic and socio-ecological point of view. A significant decline of these species has been observed, which was first evident in various studies and investigations followed by the more results of interdisciplinary research performed in intensive monitoring plots (level II) showing that the decline is climate induced. Thus, it is important to understand the climate change conditions and factors that influence Quercus spp. Typical dendroclimatological investigations were conducted on an intensive forest monitoring network based on four oak species (Q. robur, Q. petraea, Q.cerris, and Q. frainetto) in 7 permanent plots placed in southern Romania. Three patterns of climate-growth relationships were identified and discerned in accordance with the Quercus species. All oak species were found to have a positive correlation with the level of precipitation. In addition, the intensity and level of significance of correlation coefficients differ from one species to another and from one region to another.

scholarly journals Physicochemical characterization of Jatropha oil seed and suitability as biodiesel feedstock

2020 ◽  
Vol 7 (3) ◽  
pp. 581-586
Author(s):  
Aparna Yadav ◽  
◽  
Sudhakar Prasad Mishra ◽  
P. S. Kendurkar ◽  
Ajay Kumar ◽  
...  
Keyword(s):  
Iodine Value ◽  
Jatropha Curcas ◽  
Oil Content ◽  
Cetane Number ◽  
Physicochemical Characterization ◽  
Acid Value ◽  
Mean Value ◽  
Plant Seed ◽  
Saponification Value ◽  
Plant Seed Oil

The physiocochemical properties of Jatropha curcas kernel oils were characterized as potential biodiesel, including oil yield per plant, seed oil content, kernel oil content, acid value, iodine value, saponification value and cetane number. Twenty-five accessions of Jatropha curcas were used for oil content measurement sranging from 21.14 to 40.66 %with a mean value of 32.85% and Kernels oil 48.59 to 60.45 % with a mean value of 56.28 %. The seed index ranged significantly from a seed weight of 45.45 to 64.45 g. Oil yields per plant ranged from 0.44 to 2.85 kg with a mean value of 1.70 kg per plant, respectively. To understand the properties of acid value, iodine value, saponification and cetane number, experimental physio-chemical studies were performed. Since these properties are critical for determining the current oil condition. The current study confirms that accession seeds performed higher than international saponification value, iodine value and cetane number standards may be an important source for meeting potential energy requirements.

Sign in / Sign up

Export Citation Format

Share Document