VARIABILITÉ PHÉNOTYPIQUE ET SÉLECTION DES CARACTÈRES AGRONOMIQUES DU BLÉ DUR (Triticum durum Desf.) SOUS CONDITIONS SEMI-ARIDES

Genetic improvement of agronomic traits related to yield performance and adaptation to the production environments is conditioned by the presence of phenotypic variability of the targeted characters in the plant material subjected to selection. This research was conducted to assess the magnitude of phenotypic variability, the heritability and the expected genetic gain of selection of agronomic traits in 18 durum wheat (Triticum durum Desf) varieties and segregating lines. The results showed the presence of significant variability for the measured traits. The degree of genetic determination had values greater than 70% for the duration of the vegetative phase and plant height, and below 50% for yield and aboveground biomass. The expected genetic gain ranged from 4.8% for the duration of the vegetative phase to 45.9% for grain yield. Single-character selection identified 6 desirable genotypes which brought increases of 14.9% in harvest index, 3.7 g in 1000 kernel weight, 4.8% in relative water content, and declines of 18.6% in percent cells injury, 2.1 g in yield per plant, 2.1 cm in spike length, and 12.9 grains per spike, and a gain of 1.7 spikes associated to 8.8 g of biomass. Relatively to Bousselam, the check cultivar, the selected lines brought a grain yield advantage ranging from 53.8 to 161.5%. This yield gain is associated with a desirable improvement in heat stress tolerance, and an undesirable reduction in thousand kernel weight. The study of th

Infantile Scurvy: Two Case Reports

Background. Ascorbic acid (vitamin C) is necessary for the formation of collagen, reducing free radicals, and aiding in iron absorption. SCURVY, a disease of dietary ascorbic acid deficiency, is uncommon today. It still exists in high risk groups including economically disadvantaged populations with poor nutrition. The incidence of SCURVY in the pediatric population is very low. Cases Report. Here we report two cases of SCURVY revealed by subperiosteal hematoma in children with cerebral palsy and developmental delay. Conclusion. SCURVY is extremely rare in children. Musculoskeletal manifestations are prominent in pediatric SCURVY. Multiple subperiosteal hematomas are an important indicator for diagnosis

Predicting Variables of Academic Achievement and Science Self-Concept of Students in Third Year Guidance School Based on Parents' Education Level and Attitude towards Science

This study was aimed at predicting variables of academic achievement and science self-concept of students in third year guidance based on parents' education level and attitude towards science. Findings of the Thamesin (2007) were used in this study. The sample of this study is 3981 students of third year guidance who answered to questionnaire of Thames 2007.  Collected data were analyzed through structural equation model and results showed that only two routes, namely the direct effect of attitude towards science on science self-concept and science improvement are not significant with possibility of 95%, but the rest of the routs namely the direct effect of parental education on science advancement and attitudes toward science are significant and positive and their influence on science self-concept is negative and significant. Also, the direct influence of science development on science self-concept is positive and significant and its impact on attitude toward science is significant and negative. Moreover, the direct effect of self-concept on attitudes toward science is significant and positive and its influence on science achievement variable is negative and significant. Indirect influence of parental education variables, attitudes towards science and science self-concept on science advancement was reported significant. But, only the overall effect of parental education on the development of science is significant and overall effect of variables of attitudes to science and self-concept on development of science was reported insignificant. In addition, the overall indirect effect of parents' education and development of science on self-concept is significant and also attitude towards science has indirect and significant influence on science self-concept and its overall effect on self-concept is not significant. The general and indirect effect of variables of self-concept and development of science on attitude towards science was significant, while the overall impact of variable of parental education on the attitude to science was non-significant and its indirect effect was reported to be significant. The results indicated that the variables of attitude towards science, science self-concept and achievement have moderating role

Nail-Patella Syndrome Associated with Short Stature: A Case Series

Introduction. Nail-patella syndrome (NPS) is a rare genetic disorder that is characterized by a pleiotropic malformation affecting the nail, the skeleton, and occasionally the central nervous system and the kidneys. Case Presentation. We report two paediatric cases, which are of two sisters, who aged, respectively, two and five years. They are admitted to explore short stature. The initial clinical examination and radiologic findings confirmed the diagnosis of Nail-patella syndrome. Conclusion. Skeletal, ophthalmologic, and renal involvements were mostly associated with NPS. The association with short stature was exceptional

Predicting Variables of Academic Achievement and Science Self-Concept of Students in Third Year Guidance School Based on Parents' Education Level and Attitude towards Science

This study was aimed at predicting variables of academic achievement and science self-concept of students in third year guidance based on parents' education level and attitude towards science. Findings of the Thamesin (2007) were used in this study. The sample of this study is 3981 students of third year guidance who answered to questionnaire of Thames 2007.  Collected data were analyzed through structural equation model and results showed that only two routes, namely the direct effect of attitude towards science on science self-concept and science improvement are not significant with possibility of 95%, but the rest of the routs namely the direct effect of parental education on science advancement and attitudes toward science are significant and positive and their influence on science self-concept is negative and significant. Also, the direct influence of science development on science self-concept is positive and significant and its impact on attitude toward science is significant and negative. Moreover, the direct effect of self-concept on attitudes toward science is significant and positive and its influence on science achievement variable is negative and significant. Indirect influence of parental education variables, attitudes towards science and science self-concept on science advancement was reported significant. But, only the overall effect of parental education on the development of science is significant and overall effect of variables of attitudes to science and self-concept on development of science was reported insignificant. In addition, the overall indirect effect of parents' education and development of science on self-concept is significant and also attitude towards science has indirect and significant influence on science self-concept and its overall effect on self-concept is not significant. The general and indirect effect of variables of self-concept and development of science on attitude towards science was significant, while the overall impact of variable of parental education on the attitude to science was non-significant and its indirect effect was reported to be significant. The results indicated that the variables of attitude towards science, science self-concept and achievement have moderating role

VARIABILITÉ PHÉNOTYPIQUE ET SÉLECTION DES CARACTÈRES AGRONOMIQUES DU BLÉ DUR (Triticum durum Desf.) SOUS CONDITIONS SEMI-ARIDES

Genetic improvement of agronomic traits related to yield performance and adaptation to the production environments is conditioned by the presence of phenotypic variability of the targeted characters in the plant material subjected to selection. This research was conducted to assess the magnitude of phenotypic variability, the heritability and the expected genetic gain of selection of agronomic traits in 18 durum wheat (Triticum durum Desf) varieties and segregating lines. The results showed the presence of significant variability for the measured traits. The degree of genetic determination had values greater than 70% for the duration of the vegetative phase and plant height, and below 50% for yield and aboveground biomass. The expected genetic gain ranged from 4.8% for the duration of the vegetative phase to 45.9% for grain yield. Single-character selection identified 6 desirable genotypes which brought increases of 14.9% in harvest index, 3.7 g in 1000 kernel weight, 4.8% in relative water content, and declines of 18.6% in percent cells injury, 2.1 g in yield per plant, 2.1 cm in spike length, and 12.9 grains per spike, and a gain of 1.7 spikes associated to 8.8 g of biomass. Relatively to Bousselam, the check cultivar, the selected lines brought a grain yield advantage ranging from 53.8 to 161.5%. This yield gain is associated with a desirable improvement in heat stress tolerance, and an undesirable reduction in thousand kernel weight. The study of th

Author Material: Neuroimaging evidence for a role of neural social stress processing in ethnic minority associated environmental risk

This supplementary material has been provided by the authors to give readers additional information about their work

The correlation of transformer oil electrical properties with water content using a regression approach

An experimental investigation is conducted to measure and correlate the impact of the water content on the electrical characteristics of the mineral oil for transformers, particularly the breakdown voltage, the resistivity, and the dielectric dissipation factor. Regression method is carried out to compare the results obtained through laboratory experiments with those predicted using an analytical model. A treatment to reduce water content in oil involving filtration, degassing and dehydration using a SESCO mobile station was applied to the new, regenerated, and used oil samples in service. The breakdown voltage, the resistivity, and the dielectric dissipation factor of the samples were measured. Regression analysis using an exponential model was applied to examine the samples electrical properties. The results show that, after treatment, the breakdown voltage and resistivity increase as the water content decreases, unlike the dielectric dissipation factor which exhibits a decreasing trend. This trend is found to be similar for the three oil samples: new, regenerated, and used. The results of the regression analysis give close agreement with the experimental results for all the samples and all studied characteristics. The model shows strong correlation with high coefficients (>90%)

Electrical discharge reproduction in rod-barrier-plane system

The present paper deals with new modeling to reproduce the electric discharge in the rod-plane air gap system with rubber insulating barrier under AC and impulse voltage. This model considers the randomness character of discharge evolution which is governed by the electric field. The discharges shape obtained by this model are compared with ones given by experimental tests. The established model reproduces correctly the forms of discharges obtained by experimental tests under AC voltage. It is found that the behavior of the electrical discharge depends not only on the dimension (thickness and width) of the insulating barriers but on its positions in the air gap as well. It is to highlight that the mode of applied voltage is of key importance barrier. Experimental investigation shows that the developed arc can evolve on 1 to 4 channels. The generated discharges in AC voltage distinguish by the formation of a multiple-channel arc. Whereas, the discharge under lightning impulse voltage found to progress in a single channel whatever the barrier position and dimensions. The model confirms that electric field is the most important factor in the behavior of the rod-insulating barrier-plane system submitted to high voltage