Thermodynamic Evaluation of a Direct Expansion Ground-Sourced Heat Pump with Horizontal Ground Heat Exchangers Using Advanced Exergy Analysis

Zarei Abdolazim,Ameri Mehran,Ghazizade-Ahsaee Hossein 대한설비공학회 2021 International Journal Of Air-Conditioning and Refr Vol.29 No.4

This paper deals with the advanced exergetic analysis of a horizontal direct-expansion ground sourced CO 2 heat pump operating in a transcritical cycle. The cycle is thermodynamically modeled in Engineering Equation Solver (EES) considering the pressure drops in both high and low temperature heat exchangers, and the system is to provide a fixed heating load. Conventional exergy analysis orderly suggests a compressor, expansion valve, gas cooler and ground heat exchanger to be considered for system improvement, while tracing exergy destruction of all components in detail demonstrates true improvement potential of each and all components and the system as a whole and offers a different order. Advanced exergy analysis points out that the compressor is directly and indirectly responsible for 56% of the overall exergy destruction generated in the cycle, confirming the detrimental role of this component in the system. The second influential component is recognized to be a ground heat exchanger accounting for 20% exergy destruction of the compressor as well as submitting 89% avoidability in its own exergy destruction, and expansion valve proves to be the last option for system improvement according to this analysis.

Blood glucose levels, insulin concentrations, and insulin resistance in healthy women and women with premenstrual syndrome: a comparative study

Zarei, Safar,Mosalanejad, Leili,Ghobadifar, Mohamed Amin The Korean Society for Reproductive Medicine 2013 Clinical and Experimental Reproductive Medicine Vol.40 No.2

Objective: To compare the blood glucose levels, insulin concentrations, and insulin resistance during the two phases of the menstrual cycle between healthy women and patients with premenstrual syndrome (PMS). Methods: From January of 2011 to the August of 2012, a descriptive cross-sectional study was performed among students in the School of Medicine of Jahrom University of Medical Sciences. We included 30 students with the most severe symptoms of PMS and 30 age frequency-matched healthy controls. We analyzed the serum concentrations of glucose, insulin, and insulin resistance by using the glucose oxidase method, radioimmunometric assay, and homeostasis model assessment of insulin resistance equation, respectively. Results: No significant differences between the demographic data of the control and PMS groups were observed. The mean concentrations of glucose of the two study groups were significantly different during the follicular and luteal phases (p=0.011 vs. p<0.0001, respectively). The amounts of homeostasis model assessment of insulin resistance of the two study groups were significantly different in the luteal phase (p=0.0005). Conclusion: The level of blood glucose and insulin resistance was lower during the two phases of the menstrual cycle of the PMS group than that of the controls.

Chronic Pain and Its Determinants: A Population-based Study in Southern Iran

Zarei, Safar,Bigizadeh, Shiva,Pourahmadi, Mohammad,Ghobadifar, Mohamed Amin The Korean Pain Society 2012 The Korean Journal of Pain Vol.25 No.4

Background: Prevalence of chronic pain and its association with demographic characteristics have been reported by different studies from different geographical regions in the world. However, data from many Middle East countries including Iran (especially southern Iran) are scare. The aim of the present study was to demonstrate the prevalence of chronic pain and its association with demographic, psychological and socioeconomic factors in an Iranian population. Methods: In this population-based survey, the target population was comprised of subjects aged 20 to 85 years residing in Jahrom, southern Iran during 2009-2011. All eligible subjects were invited to participate in the study. Before a detailed questionnaire was given; face to face interviews were done for each individual. Results: There were 719 men and 874 women with an average age of 40.5 years at the onset of the study. Among the study population, 38.9% (620/1,593) complained of chronic pain, of whom 40.8% (253/620) were men and 59.2% (367/620) were women. Foot and joint pain were observed in 31.9%. Hip and spine pain, migraine and tension headaches, heart pain, and abdomen pain were observed in 21.5%, 15.5%, 9.5%, and 8.0% of chronic pain cases, respectively. There was a significant association among the covariables age, sex, overweight, educational level, income, and type of employment with chronic pain as the dependent variable (P < 0.0001). Conclusions: Our findings show the prevalence of chronic pain and its association with demographic, psychological and socioeconomic factors. Individuals with low incomes and less education became accustomed to pain due to a lack of knowledge.

Hydroalcoholic Extract of Scrophularia Striata Attenuates Hypertrophic Scar, Suppresses Collagen Synthesis, and Stimulates MMP2 and 9 Gene Expression in Rabbit Ear Model

Zarei Hatam,Tamri Pari,Asl Sara Soleimani,Soleimani Meysam,Moradkhani Shirin 대한약침학회 2022 Journal of pharmacopuncture Vol.25 No.3

Objectives: Hypertrophic scars (HSs) are caused by abnormal wound healing. To date, no standard treatment has been made available for HSs. Scrophularia striata has been reported to accelerate wound healing and has the potential to prevent HS formation. In this study, we investigated the anti-scarring effects of S. striata extract (SSE) in a rabbit ear model of scarring. Methods: In this study, New Zealand white rabbit (weight: 2.3-2.5 kg) were used. In the prevention phase of the study, three test groups received 5%, 10%, and 15% ointments of SSE in the Eucerin base, the fourth group received Eucerin, and the fifth group received no treatment. The samples were obtained on day 35 after wounding. In the treatment phase of the study, the test groups received an intralesional injection of SSE (5%, 10%, and 15%), the fourth group received an intralesional injection of triamcinolone, the fifth group received a solvent (injection vehicle), and the sixth group received no treatment. To evaluate the anti-scarring effects of SSE, the scar elevation index (SEI), epidermis thickness index (ETI), collagen deposition, and MMP2 and MMP9 gene expression were evaluated. Results: A significant reduction in SEI, ETI, and collagen deposition was noted in animals treated with SSE compared with the control groups. In addition, topical SSE stimulated MMP2 and MMP9 gene expression. Conclusion: The findings of this study demonstrate the potential for SSE in the prevention and treatment of HS. SSE could be prepared as an appropriate formulation to treat wounds and prevent abnormal scarring.

Majandeh Andazaq metamorphic rocks indicate an arc magmatic setting in NW IranMajandeh Andazaq metamorphic rocks indicate an arc magmatic setting in NW Iran

Zarei Barenji Arezou,Chang Whan Oh 대한지질학회 2022 대한지질학회 학술대회 Vol.2022 No.10

Phylogenetic relationships of Iranian Allium species using the matK (cpDNA gene) region

Zarei, Hemadollah,Fakheri, Barat Ali,Naghavi, Mohammad Reza,Mahdinezhad, Nafiseh The Korean Society of Plant Biotechnology 2020 식물생명공학회지 Vol.47 No.1

Allium L. is one of the largest genera of the Amaryllidaceae family, with more than 920 species including many economically important species used as vegetables, spices, medicines, or ornamental plants. Currently, DNA barcoding tools are being successfully used for the molecular taxonomy of Allium. A total of 46 Allium species were collected from their native areas, and DNA was extracted using the IBRC DNA extraction kit. We used specific primers to PCR amplify matK. DNA sequences were edited and aligned for homology, and a phylogenetic tree was constructed using the neighbor-joining method. The results show thymine (38.5%) was the most frequent and guanine (13.9%) the least frequent nucleotide. The matK regions of the populations were quite highly conserved, and the amount of C and CT was calculated at 0.162 and 0.26, respectively. Analysis of the nucleotide substitution showed C-T (26.22%) and A-G (8.08%) to have the highest and lowest percent, respectively. The natural selection process dN/dS was 1.16, and the naturality test results were -1.5 for Tajima's D and -1.19 for Fu's Fs. The NJ dendrogram generated three distinct clades: the first contained Allium austroiranicum and A. ampeloprasum; the second contained A. iranshahrii, A. bisotunense, and A. cf assadi; and the third contained A. rubellum and other species. In this study, we tested the utility of the matK region as a DNA barcode for discriminating Allium. species.

Mycoplasma genitalium and Cancer: A Brief Review

Zarei, Omid,Rezania, Simin,Mousavi, Atefeh Asian Pacific Journal of Cancer Prevention 2013 Asian Pacific journal of cancer prevention Vol.14 No.6

Approximately, 15-20% of all cancers worldwide are caused by infectious agents. Understanding the role of infectious agents on cancer development might be useful for developing new approaches to its prevention. Mycoplasma genitalium is a clinically important sexually transmitted pathogen that has been associated with several human diseases. There have been a few studies suggestive of probable roles of Mycoplasma genitalium in cancer development, including prostate and ovarian cancers and lymphomas, but the role of this microorganism like other Mycoplasma species in neoplasia is still conjectural. Considering the prevalence of Mycoplasma genitalium infections and also the emergence of resistant strains, Mycoplasma genitalium needs more attention in the infectious agent cancer-causing research area.

Metal-Free Oxidation of Alcohols to Their Corresponding Carbonyl Compounds Using NH₄NO₃/Silica Sulfuric Acid

Zarei, Amin Korean Chemical Society 2012 Bulletin of the Korean Chemical Society Vol.33 No.7

A metal-free and efficient procedure for the oxidation of alcohols into the corresponding carbonyl compounds has been described using ammonium nitrate in the presence of silica sulfuric acid under mild and heterogeneous conditions. The use of non-toxic and inexpensive materials, simple and clean work-up, short reaction times and good yields of the products are among the advantages of this method.

Halide (Cl^-, Br^-, I^-) Influence on the Electronic Properties of Macrocyclic Nickel(II) Complexes: Ab-initio DFT Study

Zarei, Seyed Amir,Akhtari, Keivan,Hassanzadeh, Keyumars,Piltan, Mohammad,Saaidpour, Saadi,Abedi, Marjan Korean Chemical Society 2013 대한화학회지 Vol.57 No.3

The geometry structures of hexa-coordinated [NiLX]X complexes ($X=Cl^-,\;Br^-,\;I^-$) {L = 8,9,18,19-tetrahydro-7H,17H-dibenzo[f,o] [1,5,9,13]dioxadiaza cyclohexadecine-8,18-diol} are optimized by density functional theory (DFT) using B3LYP/LANL2DZ. The calculated geometric parameters are in good agreement with the corresponding experimental values. Calculation results about these complexes show that dipole moment decreases, and the energy levels of HOMOs descend from iodo-complex to chloro-complex. The energy levels of HOMOs descend gently from iodo-complex to chloro-complex, while the energy levels of LUMOs in the present complexes are almost similar; therefore the energy gapes between HOMOs and LUMOs increased from iodo-complex to chloro-complex.

Laboratory Investigations on Geotechnical Characteristics of Albumen Treated Loess Soil

Chia Zarei,Fangtong Wang,Pu Qiu,Peipei Fang,Yong Liu 대한토목학회 2022 KSCE JOURNAL OF CIVIL ENGINEERING Vol.26 No.2

An environmental improvement method using albumen, which is convenient, cost-effective, rapid and environmentally friendly, has been used for soil stabilization. In this research, the improvement influence of albumen added in various percentages to loess soil was investigated. Atterberg limits and compaction test were performed to study the influence of albumen on the soil. In addition, oedometer test and compression and extension triaxial tests were conducted to analyze geotechnical characteristics of the soil after treatment. From an engineering perspective, compression and extension strength of soils stabilized with 2% albumen at confining pressure of 200 kPa were 1.47 and 0.122 times larger than that of untreated soils, respectively. In all treated specimens, secant deformation modulus versus albumen content displayed higher values than untreated specimens, it means that deformability of treated specimens is less than untreated soil. In undrained compression test maximum pore water pressure decreased in treating specimens. Also, pore water pressure in extension triaxial test changed from negative to a positive value when treating the specimen with 2% albumen at confining pressure of 200 kPa. Treated specimens are shown more stable structure in comparison with untreated specimens. The behavior of the specimens changed to be more dilative, especially, in treating specimens with 2% albumen. Furthermore, settlement of the treated specimens decreased compared with untreated specimens. Field emission scanning electron microscopy images presented less porous and denser soil structure on the surface of treated specimens. Albumen additive can be implemented as a soil stabilizer in geotechnical projects.