LA MESURE DE L’INTERFÉRENCE DU CHIENDENT DANS L’ORGE

1982 ◽  
Vol 62 (1) ◽  
pp. 183-188 ◽  
Author(s):  
R. RIOUX
Keyword(s):  
Regression Analysis ◽  
Hordeum Vulgare ◽  
Linear Relationship ◽  
Linear Relation ◽  
Shoot Density ◽  
Yield Variability ◽  
Hordeum Vulgare L ◽  
The Mean ◽  
The Relationship ◽  
Agropyron Repens

Barley (Hordeum vulgare L. ’Champlain’) was grown with quackgrass (Agropyron repens (L.) Beauv.) at various densities for 3 yr. According to the regression analysis, a linear relation is appropriate to describe the relationship between yield of barley and biomass or density of quackgrass. A greater proportion of yield variability was explained by density (64%) than by biomass (40%). Density is then a better criterion than biomass to predict yield lost in barley. The linear relationship between barley yield and the shoot density of quackgrass is estimated by the following equation: yield barley = 345.3–0.5682 dens, quackgrass. An increase of 10 shoots/m2 in the mean density of quackgrass resulted in a mean loss of 6 g/m2 in the yield of barley.

Barley seed storage under controlled conditions

2019 ◽  
pp. 140-150 ◽  
Author(s):  
O. A. Zadorozhna ◽  
T. P. Shyianova ◽  
M.Yu. Skorokhodov
Keyword(s):  
Hordeum Vulgare ◽  
Moisture Content ◽  
Spring Barley ◽  
Seed Storage ◽  
Growing Season ◽  
Storage Conditions ◽  
Meteorological Conditions ◽  
Hordeum Vulgare L ◽  
The Relationship ◽  
And Storage

Seed longevity of 76 spring barley gene pool samples (Hordeum vulgare L. subsp. distichon, convar. distichon: 56 nutans Schubl., two deficience (Steud.) Koern., two erectum Rode ex Shuebl., two medicum Koern.; convar. nudum (L.) A.Trof.: one nudum L. та subsp. vulgare: convar. vulgare: nine pallidum Ser., three rikotense Regel.; convar. coeleste (L.) A.Trof.: one coeleste (L.) A.Trof.) from 26 countries, 11 years and four places of reproduction was analyzed. Seeds with 5–8% moisture content were stored in chamber with unregulated and 4oC temperature. The possibility of seed storage under these conditions for at least 10 years without significant changes in germination has been established. The importance of meteorological conditions in the formation and ripening of seeds for their longevity is confirmed. The relationship between the decrease of barley seeds longevity and storage conditions, amount of rainfall, temperature regime during the growing season of plants is discussed.

scholarly journals The Relationship between Thyroid Function and Depressive Symptoms—the FIN-D2D Population-Based Study

2015 ◽  
Vol 8 ◽  
pp. CMED.S24111 ◽  
Author(s):  
Juha Saltevo ◽  
Hannu Kautiainen ◽  
Pekka Mäntyselkä ◽  
Antti Jula ◽  
Sirkka Keinänen-Kiukaanniemi ◽  
...  
Keyword(s):  
Regression Analysis ◽  
Depressive Symptoms ◽  
Thyroid Function ◽  
Participation Rate ◽  
Population Based ◽  
Thyroid Stimulating Hormone ◽  
Free Triiodothyronine ◽  
Population Based Study ◽  
The Mean ◽  
The Relationship

The association between thyroid function and depression is controversial. Both conditions express many similar symptoms, but the studies done give conflicting results. This study draws on a random, population-based sample of 4500 subjects aged 45–75 years old from Finland. The basic clinical study was done in 2007 for 1396 men and 1500 women (64% participation rate). Thyroid stimulating hormone (TSH), free thyroxine (F-T4), and free triiodothyronine (F-T3) were measured in 2013 from frozen samples. The 21-item Beck Depression Inventory (BDI-21) was applied to assess depressive symptoms (score ≥10 points). The prevalence of depressive symptoms was 17.5% in women and 12.5% in men. In women, the mean levels of TSH, F-T4, and F-T3 without depressive symptoms vs. with the presence of depressive symptoms were 1.92/1.97 mU/L, 13.1/13.1 pmol/L, and 3.91/3.87 pmol/L (NS), respectively. In men, the levels were 1.87/1.94 mU/L, 13.5/13.7 pmol/L, and 4.18/4.12 pmol/L (NS), respectively. In multiple regression analysis, TSH had no relationship to BDI-21 total score. We found no association between depressive symptoms and thyroid values.

CHROMOSOMAL INSTABILITY IN A HYBRID BETWEEN HORDEUM VULGARE AND SECALE VAVILOVII

1982 ◽  
Vol 24 (2) ◽  
pp. 207-212 ◽  
Author(s):  
George Fedak ◽  
Chiharu Nakamura
Keyword(s):  
Hordeum Vulgare ◽  
Chromosome Number ◽  
Chiasma Frequency ◽  
Chromosomal Instability ◽  
Chromosome Instability ◽  
Somatic Tissue ◽  
Unreduced Gamete ◽  
Hordeum Vulgare L ◽  
The Mean

A hybrid was obtained between Hordeum vulgare L. cv. Betzes (2n = 2x = 14) and Secale vavilovii [Nürn. (2n = 2x = 14)] in which chromosome instability was observed in somatic and meiotic tissues. In somatic tissue the chromosomes per cell varied from 7 to 24 with a mean of 19.7. Similarly in meiotic tissue the chromosome number varied from 14 to 26 with a mean of 18.3. The mean chiasma frequency was 12.9 consisting of an average Ml configuration of 0.02IV + 0.3III + 6.68II + 3.92I. It was concluded that the hybrid was derived from the union of an unreduced gamete from Betzes barley with a normal gamete from S. vavilovii.

scholarly journals Effects of potassium fertilization on Radiocaesium transfer from sandy soil to barley (Hordeum vulgare L.)

2019 ◽  
Vol 48 (2) ◽  
pp. 387-394
Author(s):  
SM Soliman ◽  
Ahmed A Moursy ◽  
HS Eissab
Keyword(s):  
Hordeum Vulgare ◽  
Plant Growth ◽  
Sandy Soil ◽  
Growth Period ◽  
Total Biomass ◽  
Discrimination Factor ◽  
Hordeum Vulgare L ◽  
Sand Soil ◽  
The Mean ◽  
Experimental Soil

Uptake and translocation of radiocesium artificially added to sand soil cultivated with barley as affected by different rates of potassium were traced in outdoor pot experiment. Experimental soil was contaminated with 0.01 and 0.1 mM 137Cs equal to (200 and 400 Bq/kg) in the form of CsCl and incubated for 14 days prior to 150 days plant growth period. The transfer factor (TF) average values from soil-to-total biomass were found to range from 0.40 up to 0.53 as affected by interaction between tested treatments. Increasing K rates from 125 to 250 kg/ha markedly reduced the mean averages of TFs of 137Cs from soil-to-roots by about 24 to 68%, respectively and from soil-to-total biomass by about 36 and 74%, respectively lower than corresponding control. In all cases, the discrimination factor was below unity, indicating that Cs is less efficiently absorbed from soil than its nutrient analogue K.

scholarly journals Barley response to seeding date in central Alberta

2003 ◽  
Vol 83 (2) ◽  
pp. 275-281 ◽  
Author(s):  
P. E. Juskiw ◽  
J. H. Helm
Keyword(s):  
Hordeum Vulgare ◽  
Grain Yield ◽  
Grain Filling ◽  
Kernel Weight ◽  
Seeding Rate ◽  
Hordeum Vulgare L ◽  
Vegetative Period ◽  
Seeding Date ◽  
The Mean ◽  
Grain Filling Period

Seeding date is an important factor influencing productivity of barley (Hordeum vulgare L.). When conditions are conducive to early seeding or result in delayed seeding, producers need to know how cultivars will respond to these seeding situations. In this study, five cultivars (Abee, Harrington, Jackson, Noble and Virden) registered for western Canada were studied for 4 yr (1990 to 1993) when seeded early (late April or early May), in mid-May, in late-May, or late (mid-June) at Lacombe, AB. For all cultivars, early seeding resulted in grain yield advantages of 113 to 134% of the mean site yield, while with late seeding, grain yields were reduced to 54 to 76% of the mean site yield. The reduction in yield was least for Jackson, the earliest maturing cultivar tested. Late seeding reduced the period from sowing to emergence, vegetative period, grain-filling period, time from emergence to physiological maturity, test weight, grain yield, kernel weight, and tillers per plant; and increased plant height and percent thins. Late seeding had no significant effect on phyllochron, stand establishment, scald, lodging, protein content of the grain, kernel number per spike, and spikelet number per spike. Barley responded positively to early seeding in central Alberta, but when seeding was delayed (in this study to mid-June) the early and mid-maturing six-rowed cultivars with short phyllochrons performed better than the two-rowed and late six-rowed cultivars. Key words: Hordeum vulgare L., seeding rate, phenological development, grain quality, grain yield, components

scholarly journals Socially prescribed perfectionism and affectivity in Spanish child population

2016 ◽  
Vol 7 (1) ◽  
pp. 17-29
Author(s):  
María Vicent ◽  
Cándido Inglés ◽  
Ricardo Sanmartín ◽  
Carolina Gonzálvez ◽  
Lucía Granados Alós ◽  
...  
Keyword(s):  
Regression Analysis ◽  
Negative Affect ◽  
Positive And Negative Affect ◽  
Adolescent Population ◽  
Socially Prescribed Perfectionism ◽  
The Mean ◽  
Low Levels ◽  
The Relationship ◽  
Affective Dimensions ◽  
Effect Magnitude

This study aims to analyze the relationship between Socially Prescribed Perfectionism (SPP) and affect during childhood. A sample of 804 students aged between 8 and 11 years old (M=9.57; SD=1.12), as well as the SPP subscale of the Child and Adolescent Perfectionism Scale and the 10-Item Positive and Negative Affect Schedule for Children, which assess the Positive Affect (PA) and Negative Affect (NA), were employed. The mean scores in PA and NA between students with high and low levels of SPP were compared. Students with high SPP significantly scored higher than their peers with low SPP, both in PA and NA. The effect magnitude of the found differences was small. Accordingly, the results of the logistic regression analysis revealed that both affective dimensions predicted positively and significantly high scores in SPP with Odd Ratio values of 1.08 and 1.05, respectively, for PA and NA. The results do not match the previous empirical evidence in adult and adolescent population. This implies that the consequences of considering the environment as demanding of perfectionism does not have the same consequences in childhood than in later ages.

scholarly journals Prevalence of HIV-associated neurocognitive disorder (HAND) and its subgroups among HIV-positive persons on anti-retroviral therapy in Iran

Psihologija ◽  
2020 ◽  
Vol 53 (2) ◽  
pp. 115-127
Author(s):  
Elham Mazaheri-Tehrani ◽  
Vahid Nejati ◽  
Alinaghi Seyed ◽  
Omid Dadras ◽  
Andrea Cossarizza ◽  
...  
Keyword(s):  
Regression Analysis ◽  
Disease Duration ◽  
Hiv Positive ◽  
Neurocognitive Disorder ◽  
Educational Levels ◽  
Cd4 Counts ◽  
The Mean ◽  
Hiv Associated Neurocognitive Disorder ◽  
New Biomarkers ◽  
The Relationship

This study aimed to determine the prevalence and determinants of HIV-associated neurocognitive disorder (HAND) and its subgroups in HIV-positive patients in Tehran, Iran. Ninety-three HIV-positive individuals were assessed; the majority were male (60%) and the mean age of patients was 36.5 years (SD = 9), with 8 years as the median duration of HIV infection. The relationship between demographic and clinical variables was examined using logistic regression analysis. The overall prevalences of HAND and cognitive complaints were 50.5% and 73%, respectively. Lower nadir CD4 counts (? 200), lower educational levels (? 12 years), longer disease duration (? 5years), and higher depression rates were positively associated with the presence of HAND. This study shows that the prevalence of HANDs in Iran is high, but similar to the prevalence levels found in Western societies. Further studies are needed to longitudinally evaluate the presence of HAND, in particularly to recognize new biomarkers and specific neurocognitive domains in HIV.

Adrenal function of extremely premature infants in the first 5 days after birth

2019 ◽  
Vol 32 (4) ◽  
pp. 363-367 ◽  
Author(s):  
Sze M. Ng ◽  
Akinsola Ogundiya ◽  
Mohammed Didi ◽  
Mark A. Turner
Keyword(s):  
Regression Analysis ◽  
Multiple Regression Analysis ◽  
Multiple Regression ◽  
Premature Infants ◽  
Plasma Cortisol ◽  
Early Morning ◽  
Adrenal Function ◽  
Plasma Acth ◽  
The Mean ◽  
The Relationship

Abstract Background There is limited data on adrenal function in the early days after birth in extremely premature infants. The relationship between plasma adrenocorticotrophic (ACTH) and cortisol hormone is central to the integrity of the hypothalamic-pituitary-adrenal (HPA) axis yet there are no studies examining this relationship in prematurity. Methods The aim of this study was to examine the relationship between early morning plasma cortisol and ACTH concentrations during the first 5 days after birth in infants born at less than 28 weeks’ gestation and to identify any independent factors that determine plasma cortisol levels in these infants during extreme prematurity. We prospectively studied early morning plasma ACTH and cortisol concentrations in infants born below 28 weeks’ gestation during the first 5 days of birth. Plasma cortisol was measured without extraction, using DPC Immulite® 2000 using a solid phase 2 site chemiluminescent immunometric assay. ACTH was measured using a radioimmunoassay. Spearman’s correlation was used to examine the relationship between cortisol and ACTH. Multiple regression analysis was used to examine the relationship between plasma cortisol and clinical risk index for babies (CRIB) score, antenatal dexamethasone, mode of delivery and gestation. Results There were 95 infants (53 males) of mean gestation 25.3 ± 1.3 standard deviation (SD) (range 23–27 + 6) weeks. The mean birth weight was 809 ± 17.0 g. The mean plasma cortisol was 400.5 ± 42.6 nmol/L and the mean plasma ACTH was 4.5 ± 0.9 pmol/L. Early morning plasma cortisol correlated significantly with gestation (R = 0.4, p = 0.005). Early morning plasma ACTH did not correlate with early morning plasma cortisol (R = −0.12, p = 0.7). Multiple regression analysis showed that gestation was the only independent determinant of early morning plasma cortisol concentration (beta coefficient = −0.4, p = 0.04). Conclusions The relationship between early morning plasma ACTH and plasma cortisol is either not established or is impaired in infants of less than 28 weeks’ gestation in the first 5 days after birth. The plasma cortisol level is mainly determined by gestation and is not directly related to illness severity, antenatal steroids or plasma ACTH in these infants in the first 5 days after birth.

Acceptance towards Goods and Services Tax (GST) among local business communities

2017 ◽  
Vol 5 (4) ◽  
pp. 62
Author(s):  
Shahariah Asmuni ◽  
Sabariah Yusoff ◽  
Nur Syuhadah Mohd Ses
Keyword(s):  
Regression Analysis ◽  
Multiple Regression Analysis ◽  
Multiple Regression ◽  
Business Community ◽  
Key Factors ◽  
Business People ◽  
Independent Variables ◽  
Goods And Services ◽  
The Mean ◽  
The Relationship

The Goods and Services Tax (GST) has been introduced in Malaysia to replace the Sales and Services Tax (SST) to improve the efficiency of indirect tax collection. However, its implementation has not been fully understood by business people.  This research aims to examine the key factors that have contributed to the level of acceptance towards GST among business communities in a local city, Johor Bharu. In this study, three variables were selected namely awareness, understanding and attitude. Using questionnaire as a research instrument, 100 sets of questionnaires were distributed. Multiple regression analysis was used to test the relationship among awareness, understanding and attitude with the level of acceptance among business communities towards GST. The results revealed that the mean score for all independent variables is moderate. Awareness and attitude were found to have significant impact on the level of acceptance among business community towards GST, while understanding is not significant. The business community in Johor Bahru shows a moderate or positive level of acceptance and attitude towards GST.

Linearity of offspring–parent regression in barley

Genome ◽  
1989 ◽  
Vol 32 (4) ◽  
pp. 719-723
Author(s):  
T. M. Choo
Keyword(s):  
Regression Analysis ◽  
Hordeum Vulgare ◽  
Linear Regression ◽  
Maternal Effects ◽  
Doubled Haploid ◽  
Heading Date ◽  
Mean Square ◽  
Quadratic Regression ◽  
Hordeum Vulgare L ◽  
Hill Plots

A study was conducted to test the linearity of offspring–parent regression in barley. Forty-two F2 familes and 398 F∞ (i.e., doubled haploid) lines were derived from 7 × 7 diallel crosses. The F2 families, F∞ lines, and their parents were evaluated in hill plots with five replications. Three types of regression analysis (F2 family on midparent, F∞ family on midparent, and F∞ line on midparent) were carried out for grain yield, heading date, plant height, and number of spikes per hill. The linear regression mean square was significant in most cases, but the quadratic regression mean square was not significant in all cases. These results suggest that the true regression of offspring on midparent is linear, although dominance, additive × additive epistasis, and maternal effects were detected for the four traits of the same materials in previous studies.Key words: barley, Hordeum vulgare L., curvilinearity, regression, heritability.

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