This study aimed at finding the degree of leadership styles practiced by the teaching staff at the University College of Educational Sciences in Palestine and its relation to the mental health of ...students from their points of view. In order to achieve the study objectives, the researchers followed the correlative descriptive approach, A two-axis questionnaire was developed, the first one was to measure leadership styles which consisted of (30) items distributed among three fields, and the second one was to measure the mental health level, which consisted of (30) items distributed among four fields. the sample of the study consisted of (144) students, who were chosen randomly in the academic year (2020-2021). The results of the study showed the degree of practiced leadership styles got a total average of (2.97 out of 5), which meant it had a moderate degree. Meanwhile, at the fields level, the democratic field got the highest average (3.47) with a (high) degree, then the autocratic got an average of (2.86) with a (medium) degree and finally the terrestrial field got an average of (2.60) a (low) degree. The results also showed the mental health got a total average of (3.78 out of 5), which meant it had a (high) level. On the other hand, at the fields level, self-realization got the highest average with (3.90), physical health with an average of (3.79), social adjustment with an average of (3.72), and finally emotional balance with an average of (3.69). All of which were at a (high) level. In addition to this there was a positive correlation between the practiced leadership styles degree and the mental health degree level. In the light of the study results the researchers presented a set of recommendations and suggestions.
The theory of generalized Bessel functions is reformulated within the framework of an operational formalism using the multiplier representation of the Lie group $T_3$ as suggested by Miller. This ...point of view provides more efficient tools which allow the derivation of generating functions of generalized Bessel functions. A few special cases of interest are also discussed.
The palladium-induced cleavage of β-ketosters and enol carbonates derived from α-alkylated 1-indanones and 1-tetralones in the presence of (+)-
endo-2-hydroxy-
endo-3-aminobornane led to (
R)-
...α-alkylated indanones and tetralones with a large increase in the enantioselectiviy (up to 38–40%) when the reaction temperature was raised from 21 to 45–70°C. Thus, enantiopure 2-methyl-1-indanone was obtained at 52°C. More than one inversion temperature has appeared in plotting the corresponding Eyring diagrams.
Graphic
Arenaviridae synthesize viral mRNAs using short capped primers presumably acquired from cellular transcripts by a 'cap-snatching' mechanism. Here, we report the crystal structure and functional ...characterization of the N-terminal 196 residues (NL1) of the L protein from the prototypic arenavirus: lymphocytic choriomeningitis virus. The NL1 domain is able to bind and cleave RNA. The 2.13 Å resolution crystal structure of NL1 reveals a type II endonuclease α/β architecture similar to the N-terminal end of the influenza virus PA protein. Superimposition of both structures, mutagenesis and reverse genetics studies reveal a unique spatial arrangement of key active site residues related to the PD...(D/E)XK type II endonuclease signature sequence. We show that this endonuclease domain is conserved and active across the virus families Arenaviridae, Bunyaviridae and Orthomyxoviridae and propose that the arenavirus NL1 domain is the Arenaviridae cap-snatching endonuclease.
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