Ground state heavy baryon production in a relativistic quark-diquark model

We use current-current interaction to calculate the fragmentation functions to describe the production of spin-1/2, spin-1/2$'$ and spin-3/2 baryons with massive constituents in a relativistic quark-diquark model. Our results are in their analytic forms and are applicable for singly, doubly and triply heavy baryons. We discuss the production of $\Omega_{bbc}$, $\Omega_{bcc}$ and $\Omega_{ccc}$ baryons in some detail. The results are satisfactorily compared with those obtained for triply heavy baryons calculated in a perturbative regime within reasonable values of the parameters involved.Comment: 8 pages, 4 figures. To appear in Phys. Rev.

A survey on peroxide content and acidity level of persian doughnuts in lorestan province, West of Iran

There are different chemical food contaminations that cause detrimental effects on human health. For example, presence of peroxide in fried foods causes free radical formation. Free radicals are not only responsible for food spoilage, but also cause damage to body tissues and cancer, inflammatory diseases, atherosclerosis, aging and so on. The aim of this study was to evaluate the peroxide content and acidity level in Zoolbia and Bamiehin of Lorestan province, West of Iran. 120 samples of Zoolbia and Bamieh doughnuts were purchased of Lorestan province distribution centers, during March 2014 to March 2015 and handled to Laboratory for chemical analysis and determination of their peroxide value and acidity. Present descriptive study results showed 56.92 and 43.07 % of the samples were out of standard limit and not suitable for consumption due to high levels of peroxides and acidity, respectively. The lowest and highest peroxide value were 1.1 and 2.9 mEq/kg, respectively. The minimum and maximum acidity of the samples were 0.7 and 2.9 wt%, respectively. Obtained results showed high peroxide contents in Persian doughnuts in Lorestan province than standard limit. Therefore, it seems educational programs about nutrition and using proper method for cooking and frying of foods is necessary. Continuous planning and surveillance, providing practical solutions by health authorities and regulatory organs, training of food staffs, using oils a few times and especial for food frying are recommended to reduce the peroxide content in Persian doughnuts (Zoolbia and Bamieh)

An ivestigation of triply heavy baryon production at hadron colliders

The triply heavy baryons have a rather diverse mass range. While some of them possess considerable production rates at existing facilities, others need to be produced at future high energy colliders. Here we study the direct fragmentation production of the$\Omega_{ccc}$ and $\Omega_{bbb}$ baryons as the prototypes of triply heavy baryons at the hadron colliders with different $\sqrt{s}$. We present and compare the transverse momentum distributions of the differential cross sections, $p_T^{\rm min}$ distributions of total cross sections and the integrated total cross sections of these states at the RHIC, the Tevatron Run II and the CERN LHC.Comment: 9 pages, 5 figures, To appear in Nuclear Physics

Synthesis and Characterization of Carbon Nanotubes Decorated with Magnesium Ferrite (MgFe2O4) Nanoparticles by Citrate-Gel Method

In the present work, magnetic nanocomposites of the multi-walled carbon nanotubes (MWCNTs) decorated with magnesium ferrite (MgFe2O4) nanoparticles were synthesized successfully by citrate-gel method. The shape, structure, size, and properties of the as-synthesized sample were characterized by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction pattern (XRD), transmission electron microscope (TEM), vibrating sample magnetometry (VSM), and AC susceptibility measurements. The results showed that MWCNTs and MgFe2O4 coexisted in the nanocomposite and a large number of the high purity magnesium ferrite MgFe2O4 nanoparticles were attached on the surface of the MWCNTs. The hysteresis loop of the MgFe2O4/MWCNTs nanocomposites showed that the nanocomposites were superparamagnetic with the saturated magnetization of 11.79 emu/g, and the coercive of 49 Oe

Genotype Characteristics of Giardia duodenalis in Patients Using High Resolution Melting Analysis Technique in Khorramabad, Iran

Background: We aimed at genotyping and evaluating the predominance of G. duodenalis assemblages isolated from patients referred to medical laboratories in Khorramabad, Iran from Nov 2015 to Sep 2016. Hence, the development of a cost-effective HRM approach to determine genotypes of G. duodenalis based on the tri-osephosphate isomerase (tpi) gene was examined and the genotyping results with and without diarrhea was compared. Methods: Seventy G. duodenalis positive fecal samples were collected. A microscopic confirmation for the presence of Giardia spp. was performed, cysts of 70 Giardia spp. positive specimens were concentrated using sucrose flotation technique and sucrose solution PCR amplification was performed on 69 of 70 (98.5) samples, and High Resolution Melting (FIRM) analysis was performed using a software. Results: The results showed two distinct genotypes (assemblages A and B) of G. duodenalis but infections with mixture of both assemblages were not detected. The genotypes of G. duodenalis showed that the sub assemblage AI, BIII and BIV were present in a proportion of 68.1, 20.3 and 11.6 respectively in samples. Assemblage AI was significantly (P<0.05) more frequently found in patients with diarrhea. Conclusion: The sub-assemblage AI, BIII, and BIV are more zoonotic potential. According to the comparison of the results of this study with the results of previous studies in this area and around of it, as well as the way people live and keep pets. This pattern established in Khorramabad city. FIRM can be an ideal technique to detect and genotyping of G. duodenalis in clinical samples

Children struggle beyond preschool-age in a continuous version of the ambiguous figures task

Children until the age of five are only able to reverse an ambiguous figure when they are informed about the second interpretation. In two experiments, we examined whether children’s difficulties would extend to a continuous version of the ambiguous figures task. Children (Experiment 1: 66 3- to 5-year olds; Experiment 2: 54 4- to 9-year olds) and adult controls saw line drawings of animals gradually morph—through well-known ambiguous figures—into other animals. Results show a relatively late developing ability to recognize the target animal, with difficulties extending beyond preschool-age. This delay can neither be explained with improvements in theory of mind, inhibitory control, nor individual differences in eye movements. Even the best achieving children only started to approach adult level performance at the age of 9, suggesting a fundamentally different processing style in children and adults