Investigating the Preventive Effects of Oral Consumption of Dactylorhiza Maculate (Salep) Hydro-alcoholic Extract on Appetite and Body Weight in Male Rats.

Obesity is the result of positive energy balance in which various hormones and neurotransmitters are involved. Using Dietary supplements is a common and popular method to lose weight. Medicinal plants with specific effects on metabolizing enzymes, blocking adipogenesis, and improving energy metabolism can be a suitable alternative to these supplements.

Assessment of Knowledge, Attitude, and Practices Toward Coronavirus Disease 2019 and the Risks of Severe Acute Respiratory Syndrome Coronavirus 2 Infection Among Iranian Emergency Medical Services Workers: An Online Cross-Sectional Survey.

Objective: Coronavirus disease 2019 (COVID-19), a severe acute respiratory infection, has spread rapidly around the world. To expand and enhance knowledge regarding virus prevention/transmission, this study aimed to evaluate the knowledge, attitudes, and practices of emergency medical services (EMS) workers as a part of the health care system because of their essential role in the front lines of the COVID-19 outbreak.

Methods: An online cross-sectional survey was conducted on EMS workers to assess their knowledge, attitudes, and practices toward COVID-19.

Properties of Naked Silver Clusters with Up to 100 Atoms as Found with Embedded-Atom and Density-Functional Calculations.

The structural and energetic properties of small silver clusters Agn with = 2-100 atoms are reported. For = 2-100 the embedded atom model for the calculation of the total energy of a given structure in combination with the basin-hopping search strategy for an unbiased structure optimization has been used to identify the energies and structures of the three energetically lowest-lying isomers. These optimized structures for = 2-11 were subsequently studied further through density-functional-theory calculations.

Role of the Backbone when Optimizing Functional Groups─A Theoretical Study Based on an Improved Inverse-Design Approach.

We present an improved inverse-design approach for automatically identifying molecular (or other) systems with optimal values for prechosen properties. The new approach uses SMILES (simplified molecular input line entry system) to describe molecular structures efficiently, a genetic algorithm to optimize the molecules automatically, and the DFTB+ (self-consistent charge density functional tight-binding) method to calculate electronic properties. Thereby, almost every class of materials─even macromolecules or monomers─can be studied easily.

Kinetics and Thermodynamics of CO Oxidation by (TiO).

Molecular level insights into the mechanism and thermodynamics of CO oxidation by a (TiO2)6 cluster have been obtained through density functional calculations. Thereby, in this study, as an example, two different structural isomers of (TiO2)6 are considered with the purpose of understanding the interplay between local structure and activity for the CO oxidation reaction. Active sites in the two isomeric forms were identified on the basis of global and local reactivity descriptors.