A new approach for solving nonlinear Thomas-Fermi equation based on fractional order of rational Bessel functions

In this paper, the fractional order of rational Bessel functions collocation method (FRBC) to solve Thomas-Fermi equation which is defined in the semi-infinite domain and has singularity at $x = 0$ and its boundary condition occurs at infinity, have been introduced. We solve the problem on semi-infinite domain without any domain truncation or transformation of the domain of the problem to a finite domain. This approach at first, obtains a sequence of linear differential equations by using the quasilinearization method (QLM), then at each iteration solves it by FRBC method. To illustrate the reliability of this work, we compare the numerical results of the present method with some well-known results in other to show that the new method is accurate, efficient and applicable

Safely dissolvable and healable active packaging films based on alginate and pectin

Extensive usage of long-lasting petroleum based plastics for short-lived application such as packaging has raised concerns regarding their role in environmental pollution. In this research, we have developed active, healable, and safely dissolvable alginate-pectin based biocomposites that have potential applications in food packaging. The morphological study revealed the rough surface of these biocomposite films. Tensile properties indicated that the fabricated samples have mechanical properties in the range of commercially available packaging films while possessing excellent healing effciency. Biocomposite films exhibited higher hydrophobicity properties compared to neat alginate films. Thermal analysis indicated that crosslinked biocomposite samples possess higher thermal stability in temperatures below 120 °C, while antibacterial analysis against E. coli and S. aureus revealed the antibacterial properties of the prepared samples against different bacteria. The fabricated biodegradable multi-functional biocomposite films possess various imperative properties, making them ideal for utilization as packaging material

Bis(9-amino­acridinium) bis­(pyridine-2,6-dicarboxyl­ato)zincate(II) trihydrate

In the title compound, (C13H11N2)2[Zn(C7H3NO4)2]·3H2O, the ZnII ion is six-coordinated with the N4O2 donor set being a distorted octa­hedron through two almost perpendicular (r.m.s. deviation of ligand atoms from the mean plane is 0.057 Å) tridentate pyridine-2,6-dicarboxyl­ate ligands [dihedral angle between the ligands = 86.06 (4)°]. The charge is compensated by two 9-amino­acridinium cations protonated on the ring N atom. A variety of inter­molecular contacts, such as ion–ion, N—H⋯O and O—H⋯O hydrogen bonds, and π–π stacking [centroid–centroid distances = 3.4907 (9)–4.1128 (8) Å], between cations and between anions, play important roles in the formation of the three-dimensional network

Molecular identification and phylogeny of Nerita᾽s species on rocky shores of the Northern Persian Gulf

Neritas are among the most dominant groups of Gastropoda in the Persian Gulf. There is no previous study in relation to molecular and phylogeny of Neritas in the study area. The molecular identification of Nerita species have been studied for the first time in the northern rocky coastal zones of Persian Gulf during 2013 and 2014. After morphological identifications of species, DNA extraction, amplifying partial of cytochrome oxidase COI and 16S rRNA and sequencing procedure were done in the laboratory. In this study, 6 COI and 6 16S rRNA sequences, belonging to 3 species, were obtained. Also, phylogeny analyses with drawing phylogeny trees of Maximum Likelihood and Bayesian were done using MEGA6 and BEAST softwares. Morphological and molecular identification results were similar for 2 species and dissimilar for one species. This discrepancy shows that a combination of morphological and molecular studies is more reliable for species identification than either of them solely. The results also showed that Nerita species are monophyletic

An investigation on permethrin-treated military uniforms against diurnal mosquitoes under field conditions

Background: Military forces are exposed to mosquito bites because of their duties. In addition to the nuisance caused by mosquito bites, they are the vector of some vector-borne diseases in many countries of the world. Impregnation of military uniforms with permethrin is one of the most effective methods of protecting military personnel. The purpose of this study was to evaluate the effect of permethrin-impregnated uniforms against diurnal mosquitoes under field conditions. Methods: In this study, one of the most common uniforms used in the Iranian military was treated by permethrin (0.125 mg. permethrin ai/cm(2)) and evaluated against the natural population of day-biting mosquitoes, in the rural area with Eight participants, three of them put on the treated uniforms and the other one of them wore the untreated uniforms and Four officers were also appointed as collectors. Results: The average number of bites in those who wore untreated uniforms (control) was 1.8/min/person (107.8/hr), while it was 0.16 (9.83/hr) for treated uniforms. The protection of treated uniforms was about 91. The knockdown rate for Culex and Aedes mosquitoes was 95.92 and 94.44, respectively. The mortality rate in Culex was 98.59 and 98.61 in Aedes mosquitoes when exposed to treated uniforms. Conclusion: In this study, military uniforms impregnated with permethrin showed significant protection against the bites of Culex and Aedes mosquitoes. This intervention can be used to protect military personnel from the bites of Culex and Aedes these mosquitoes and to reduce the diseases transmitted by these mosquitoes

Nanoparticles Based-Plant Protein Containing Rosmarinus officinalis Essential Oil; Fabrication, Characterization, and Evaluation

The toxicity risks, instability of essential oil, and complex composition are principal obstacles to using essential plant oil for clinical applications. Solving stability-related problems, providing targeted drug delivery, and decreasing plant essential oil toxicity, encapsulation can be used successfully. Rosemary (Rosmarinus officinalis) is a perennial plant of the Lamiaceae family with various healing properties. However, the rosemary essential oil, as volatile oil, is fast evaporated, which limits its applications. This study’s goal is to boost the prevent evaporation and bioactivity of rosemary essential oil by developing zein-NPs as a promising NDS (nano-drug-delivery system) and assessing the effect of NPs on the rosemary essential oil efficacy. Scanning electron microscopy (SEM) showed NPs sizes between 70–200 nm. With dynamic light scattering analysis (DLS), the average size of zein nanoparticle-containing rosemary essential oil (NPZLA) was obtained at ca. 154.5 nm. The entrapment efficiency (EE) on rosemary essential oil was ca. 71% inside the zein NPs. The in vitro release suggests that the polymeric barrier can control the rosemary essential oil release. Zein-NPs can be potentially used as NC (nanocarrier) for enhancing the evaporation inhibitor of ether oil of rosemary essential oil to enhance its bioavailability and performance further. It can be concluded that rosemary plant can be used as the core inside the nanoparticle by biological production method due to its medicinal properties and other properties. Based on the stated content, it is clear that in the future, by conducting more extensive research, the necessary platform can be provided for the use of this medicinal plant as much as possible in the pharmaceutical industry