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Background: Opportunistic pathogens such as Cryptosporidium, Isospora belli, Blastocystis, etc. cause various gastrointestinal and non-digestive diseases in people with HIV. These symptoms are especially severe in people with HIV who have a CD4 count of less than 200. This study aimed to determine the prevalence of parasitic infections in people living with HIV in Tabriz. Methods: This cross-sectional and descriptive study was performed on137 people with HIV referred to Behavioral Disease Counseling Centers in Tabriz, 2019-2021. Then, after receiving written consent, fecal samples were collected and evaluated for the detection of parasitic infections using direct methods, Ziehl-Neelsen and Trichrome Weber stain. Results: A total of 137 stool samples were collected, including 93 males and 44 females. Most of them were in the age range of 20-60 years. The overall frequency of parasitic infections was 57.7% and the highest prevalence was related to Blastocystis 24.1% and Cryptosporidium 14.6%. Conclusion: Due to the relatively high prevalence of parasitic infections, especially Blastocystis and Cryptosporidium in people with HIV in Tabriz, which can endanger the health of these patients, essential interventions, including personal hygiene training to control and prevent infection with these pathogens, seem to be necessary.

Gas-liquid membrane contactors are promising alternatives to conventional absorption technologies. However, despite their significant advantages, such systems face the major problem of gradual wetting of the porous polymeric membranes with liquid absorbents. In fact, wetting of porous polymeric membranes by liquid absorbents increases the mass transfer resistance of the membrane phase, which in turn, reduces the gas absorption efficiency. Accordingly, in this paper, the effect of membrane wetting on mass transfer resistance and absorption efficiency has been studied. The influence of effective parameters on membrane wetting phenomenon, such as absorbent and membrane properties, is investigated. In addition, different prevention methods of membrane wetting is discussed in detail. The results show the increase in the rate of wetting at high velocity and pressure of the absorbent. In the case of absorbents-containing organic compounds, their surface tension is decreased rapidly with the increasing concentration of organic compounds, which increased the wetting rate of the membrane. In addition, studies on various polymeric membranes have shown that the structural and chemical changes of the membrane surface, which occur due to long-term contact of the membranes with amine absorbents, strongly increase the wetting of the membranes, and thus, its functionality. Moreover, studies have shown that modifying the surface of membranes is one of the most effective methods to prevent the problem of wetting. By modifying the surface, the free energy of the membrane surface can be reduced and its roughness can be increased, thus increasing the hydrophobicity of the membrane surface. Among these, nanotechnology has been introduced as one of the most important technologies in the production of superhydrophobic membranes to prevent the problem of wetting the porous polymeric membranes.

Background and purpose: Toxoplasma gondii (T. gondii) is an obligatory intracellular protozoan parasite. Toxoplasmosis is highly prevalent and has a great effect on public health, therefor, there is a need for vaccine and sensitive diagnostic procedures. This study aimed at cloning and investigating the expression of ROP13 gene of T. gondii. Materials and methods: In this study, the gene was cloned in pTG19-T vector and transferred to a TOP10 strain of E.coli following ROP13 gene amplification using PCR. Then the ROP13 gene was sub cloned in expression plasmid pcDNA3. Also, pcROP13 was transferred to CHO cells and the expression level was evaluated by IFA method. Results: Cloning and sub cloning of ROP 13 gene were confirmed by PCR, sequencing and enzymatic digestion. The gene sequencing showed complete homology with a recorded sequence in the gene bank. Moreover, the expression of ROP13 gene in CHO eukaryotic cells was confirmed by IFA method. Conclusion: The results showed that ROP13 gene was successfully sub cloned into the pcDNA3 expression vector and expressed in CHO cells. Therefore, it can be used in the development of vaccines and in diagnostic tests.

The amount of energy consumption per growth affects on economic growth in all countries, so the access of world countries to variety of energy is essential for economic growth. Numerous studies in a world have shown that the pace of growth of energy consumption will largely depend on the level of economic growth. The present study aims to investigate on the researches that has been done on impact of the renewable energy consumption on the economic growth, all over the world. And after that the relation between renewable energy consumption and growth in a selected countries of OPEC members during 1985-2014. With unit root test determine stability of data and proved that all data are stable. The linear Granger causality test indicate unidirectional causality from energy consumption to growth. F limer and hausman test also stimate for determining the Regression model.