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Optimizing consolidation behavior of Al 7068-TiC nanocomposites using Taguchi statistical analysis

Transactions of Nonferrous Metals Society of China 2015年第8期25卷 2499-2508页

作者： Amin AZIMI Ali SHOKUHFAR Omid NEJADSEYFI Hamid FALLAHDOOST saeid salehi Young Researchers and Elite Club South Tehran Branch Islamic Azad University Advanced Materials and Nanotechnology Research Center Department of Mechanical EngineeringK.N.Toosi University of Technology Department of Engineering Karaj Branch Islamic Azad University

The fabrication of high strength Al 7068？5%TiC （mass fraction） nanocomposite was studied by mechanical alloying and hot pressing routes. Considering densification importance and grain growth effects, hot pressing process conditions for producing bulk nanocomposite were optimized using statistical Taguchi method based on compressive strength achievement. The Taguchi results indicate that 30 min hot pressing under pressure of 500 MPa at 385 °C provides high compressive strength and hardness of 938 MPa and HV 265, respectively. More interestingly, analysis of variance proves that the applied pressure is the most influential factor for hot pressing of the nanocomposite. The contribution percentages of factors in hot pressing terms are as follows： applied pressure （61.3%）, exposed temperature （29.53%） and dwelling hot pressing time （4.49%）.

关键词： Al 7068-TiC nanocomposite hot pressing mechanical alloying Taguchi method mechanical properties

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Effect of green tea consumption in treatment of mild to moderate depression in Iranian patients living with HIV: A double-blind randomized clinical trial

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Chinese Herbal Medicines 2021年第1期13卷 136-141页

作者： Dehghan Manshadi Seyed Ali Mousavi Seyed Alireza salehi Mohammad Reza Zebardast Jayran SeyedAlinaghi SeyedAhmad Rezazade Shams Ali Mirhoseinian Seyed saeid Asadollahi-Amin Ali Department of Infectious Diseases and Tropical Medicine Imam-Khomeini Hospital ComplexTehran University of Medical SciencesTehranTehran 11519Iran Department of Infectious Diseases and Tropical Medicine Shahid Sadoughi HospitalShahid Sadoughi University of Medical Sciences and Health ServicesYazd 11519Iran Cognitive Neuroscience Linguistics Institute for Cognitive Science Studies(ICSS)Tehran 11519Iran Iranian Research Center for HIV/AIDS Iranian Institute for Reduction of High-Risk BehaviorsTehran University of Medical SciencesTehran 11519Iran Medicinal Plants Research Center Institute of Medicinal PlantsACECRTehran 11519Iran Department of Pharmacognosy Faculty of Pharmacy.Tehran University of Medical Sciences.Tehran 11519Iran

Objective: Depression affects people living with HIV(PLWH) compliance leading to poor control *** observational studies showed an anti-depression effect of green tea extract(GTE). The therapeutic effect of GTE on depression were investigated in PLWH receiving antiretroviral therapy(ART).Methods: Fifty PLWH on ART with diagnose of mild to moderate of depression, participated in a doubleblind, placebo-controlled trial and underwent 12 weeks of treatment with either 400 mg GTE capsules or placebo twice daily. The Hamilton depression scale of patients was measured before, 6 weeks and 12 weeks after treatment in two groups. The primary outcome measure was performed to evaluate the efficacy of GTE in improving depressive ***: The mean of Hamilton score showed a significant difference between the two groups after 12 weeks(P = 0.035). Repeated measures ANOVA test showed a significant effect for time ? treatment interaction on the Hamilton mean score between the two groups(P = 0.000).Conclusion: It seems the use of GTE capsules in PLWH on ART is safe and could lead to greater and more rapid improvement in depressive symptoms than placebo. Thus it can be considered as an alternative therapy for mild to moderate depression. Further studies with higher sample size and longer followup and comparisons with other antidepressive drugs are warranted.

关键词： depression green tea HIV

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