Parental Strategies to Promote Mental Health in Digital Citizens of Grades 6-8

The research conducted in this study was done to discern the best parental strategies to promote mental health in digital citizens of grades 6-8. The world of technology is very dynamic, and often these days children are advancing much faster than their parents. The purpose of this research study was to keep parents informed and educated of the latest trends, tools, and dangers in the digital world today. To achieve this goal the researchers held four online workshops over the course of two months to provide parents the tools necessary to raise responsible digital citizens. The results of the study proved that the workshops provided parents the knowledge they needed to promote digital citizens in the middle school aged child. The majority of the results from the comparison of the pre and post assessment survey were statistically significant with 90 - 95% certainty depending on the question. In the future, the researchers believe the effectiveness of the development of digital citizenship among middle school students would be improved if their families were introduced to the topic earlier in their educational journey, such as elementary school. Another recommendation would be yearly workshops to continue growth and understanding of digital citizenship. In conclusion, the data collected from the post survey indicates that overall, parents/guardians became empowered and knowledgeable in digital citizenship and were able to better guide their middle school aged child to become responsible digital citizens

Magnetization study of Ni/Ag multilayers

The magnetic properties of Ni/Ag multilayers, prepared by evaporation in ultrahigh vacuum under controlled conditions, have been systematically studied by magnetic measurements. A spin-wave theory has been used to explain the temperature dependence of the magnetization and the approximate values for the bulk exchange interaction Jb and surface exchange interaction JS for various Ni layer thicknesses have been obtained.The magnetic properties of Ni/Ag multilayers, prepared by evaporation in ultrahigh vacuum under controlled conditions, have been systematically studied by magnetic measurements. A spin-wave theory has been used to explain the temperature dependence of the magnetization and the approximate values for the bulk exchange interaction Jb and surface exchange interaction JS for various Ni layer thicknesses have been obtained

Some characterization results in the calculus of variations in the degenerate case

Abstract In this article, we prove an approximation result in weighted Sobolev spaces and we give an application of this approximation result to a necessary condition in the calculus of variations. Mathematics Subject Classification: 46E3

Niveau de l'acétylcholinestérase chez quatre espèces de poissons de l'estuaire du Sebou

Les organophosphorés (OP) et les carbamates (C), insecticides d’origine agricole, sont toxiques pour la plupart des organismes en raison de leur faculté d’inhibition des cholinestérases et plus particulièrement l’acétylcholinestérase (AChE). En effet, ils provoquent une accumulation des cholines au niveau des synapses, aboutissant à la paralysie puis à la mort. Afin de détecter une contamination de l’estuaire de l’Oued Sebou par ces insecticides, l’activité acétylcholinestérasique (AchE) a été dosée dans le muscle, le cerveau, le foie et les branchies de quatre poissons : Solea vulgaris (sole), Dicentrachus labrax (loup), Diplodus sargus (sar) et Pleuronectes platessa (plie). Les échantillons prélevés semestriellement dans l’estuaire de l’Oued Sebou présentent une plus faible activité AChE par rapport à celle des espèces du site témoin (large de Mehdya). Cette différence de l’activité AChE entre les deux sites, attribuée aux effets neurotoxiques liés à la présence dans le milieu d’OP ou de C, signifierait une contamination de l’estuaire de l’Oued Sebou

Inventory and world geographical distribution of the olive tree (Olea europaea L.) diseases caused by viruses, bacteria and phytoplasma

The objective of this work is to prepare an Inventory about the viral and bacterial diseases of the olive tree (Olea europaea L.) and to study their Geographical distribution in the world. Fifteen viruses were considered as pathogens on the olive tree, these viruses were reported in 22 countries in five continents showing different symptoms on different olive tree varieties. All viruses were reported in Italy, some of these viruses were found only in the Eurepean continent, such as Olive vein yellows associated virus (OVYaV), Olive yellow mottling and decline associated virus (OYMDaV), Olive mild mosaic virus (OMMV) and Olive semilatent virus (OSLV). Two bacteria were reported as pathogen on the olive tree; Pseudomonas savastanoi. pv. savastanoi responsible bacteria of thr olive knot; a serious disease of olive (Olea europaea L.) in the Mediterranean region. This bacteria was detected in 22 countries in five continents, the majority of these countries exist in the Mediterranean Basin. Another bacteria was Xylella fastidiosa responsible of the quick decline syndrome of olive (OQDS), was deteted in Europe in four countries (Italy, Spain, Portugal and Slovenia) and in America in three countries (USA, Argentina and Brazil). Phtoplasmas was reported in 5 countries in three continents (Europe, Asia and Australia)

Rapid and sensitive methods for detection of Allorhizobium vitis, causal agent of grapevine crown gall

A rapid method and sensitive methods for extraction of bacterial DNA from pure culture and directly from plant materiel were compared in polymerase chain reaction with specific primers VCF3/VCR3 to see the reliable method that can used in the detection of tumorigenic strain of Allorhizobium vitis causal agent of grapevine crown gall. From the three tested methods of DNA extraction from pure culture, the alkaline method is the most effective technique for the extraction presenting a high sensitivity with a detection threshold equal to 5.104 CFU/ml. Five different protocols for extracting bacterial DNA from plant tissues of infected tomato, based on the use of an extraction buffer, were tested to see its usefulness in detecting pathogenic strain of A. vitisS4. Two protocols based on the use of Triton X-100 and Tween 20 were efficient for detecting A. vitis S4 directly from tomato tumors with a sensitivity of 103 CFU/ml for the both protocols. Consequently, these protocols were proposed as specific protocols for the detection of tumorigenic strain of A. vitis from symptomatic and asymptomatic plants

Niveau de l'acétylcholinestérase chez quatre espèces de poissons de l'estuaire du Sebou

Les organophosphorés (OP) et les carbamates (C), insecticides d’origine agricole, sont toxiques pour la plupart des organismes en raison de leur faculté d’inhibition des cholinestérases et plus particulièrement l’acétylcholinestérase (AChE). En effet, ils provoquent une accumulation des cholines au niveau des synapses, aboutissant à la paralysie puis à la mort. Afin de détecter une contamination de l’estuaire de l’Oued Sebou par ces insecticides, l’activité acétylcholinestérasique (AchE) a été dosée dans le muscle, le cerveau, le foie et les branchies de quatre poissons : Solea vulgaris (sole), Dicentrachus labrax (loup), Diplodus sargus (sar) et Pleuronectes platessa (plie). Les échantillons prélevés semestriellement dans l’estuaire de l’Oued Sebou présentent une plus faible activité AChE par rapport à celle des espèces du site témoin (large de Mehdya). Cette différence de l’activité AChE entre les deux sites, attribuée aux effets neurotoxiques liés à la présence dans le milieu d’OP ou de C, signifierait une contamination de l’estuaire de l’Oued Sebou

Diversity of endomycorrhizal fungi in the rhizosphere of chickpea in Morocco

The endomycorrhizal fungi diversity in the rhizosphere of chickpea (Cicer arietinum L.) and the evaluation of root mycorrhizal level were studied in six regions of Morocco: Tahla, Sefrou, Souk Larbae, Souk Tlat, Ouazzane and Jarf Melha. All chickpea roots are carrying endomycorrhizal structures. Root mycorrhizal parameters varied from one site to another, and the highest frequency and intensity of mycorrhization was recorded in the roots of chickpea plants at the two sites Tahla and Jarf Melha respectively, 83%, 33% and 25.03%. In addition, the highest arbuscular content was also noted in the roots of plants growing in the site of Tahla (22.18%) while the lowest content was noted at the site of Sefrou (2.07%). However, the vesicles were not observed in all the sites. The highest numbers of endomycorrhizal spores were recorded in the rhizosphere of plants collected in Jarf Melha and Tahla, respectively, 74 and 41 spores / 100 g soil. All spores found in the studied sites are represented by 22 morphotypes belonging to 7 genera: Glomus (13 species), Acaulospora (4 species), Gigaspora (one species), Radekera (one species), Entrophospora (one species), Pacispora (one species), Dentiscutata (one species)

Some new observations on the Volvariella genus Speg. 1898

Three fungal species of the Volvariella genus were described in this study. Volvariella bombycina and Volvaria speciosa were harvested at the level of the Mamora forest. V. media was collected from one garden grass in the city of Kenitra, this species is new to the Moroccan fungal flora