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Determining structural variation in a managed mixed stand in an old-growth forest, northern Iran

Journal of Forestry Research 2019年第5期30卷 1859-1871页

作者： Mohsen Javanmiri Pour mohammad reza marvi mohadjer Vahid Etemad Meghdad Jourgholami Department of Forestry Faculty of Natural ResourcesUniversity of Tehran

Numerous approaches have been developed to quantify forest structure modules.A variety has measured each as part of stand *** study was carried out in managed mixed stands in northern *** objective was to quantify stand structure and its variation before and after tree marking through the Gini index and structural triangle method.A full sampling inventory was taken in 2004 and 2014 at the beginning and end of a period,before and after tree marking operations in five *** results indicate that the Gini index was 39.5,62.2,43.0,82.0 and 74.0%forⅠ,Ⅱ,Ⅲ,ⅣandⅤstands ***,approximate structural diameters were determined as a large category forⅠ,Ⅱ,ⅢandⅤstands while standⅡhad an intermediate-large class pre-tree marking to an intermediate-small class post-tree *** paired t-test results were not significant for tree numbers and growing stock changes for all species,and for beech,hornbeam,and velvet maple before and after tree harvesting in the whole ***,the Gini index and the structural triangle method can be used for natural stand modeling,structural diversity designation,and for management practices in nature-oriented forestry strategies.

关键词： Gini index Growing stock Mixed stand Structure changes Structural triangle method

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Modeling functional brain connections in methamphetamine and opioid abusers

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Medicine in Novel Technology and Devices 2024年第1期21卷 88-96页

作者： Nasimeh marvi Javad Haddadnia mohammad reza Fayyazi Bordbar Hakim Sabzevari University SabzevarIran Psychiatry and Behavioral Sciences Research Center Mashhad University of Medical SciencesMashhadIran

Substance abuse has become a significant problem *** primary purpose of this study was to model the functional brain connectivity in methamphetamines(Meth)and opioids(Op)groups in comparison with the healthy control(HC)*** data were recorded in Meth(n=8),Op(n=12),and HC groups(n=12)in a closed-eye resting *** NeuCube model based on a spiking neural network was used for EEG data's functional brain connectivity *** NeuCube model was evaluated quantitatively and qualitatively with model descriptive *** results showed the average value of the neuron's activation level,spikes emitted from neurons,and clustering coefficient as a communication parameter in the HC group decreased from 1154,1103,0.026 to 1036,981,0.020 in the Op group and to 511,468,0.009 in the Meth group,*** changes in indices were significant according to the ANOVA test with p〈*** decrease in indices was more significant in the Meth group than in the Op *** research findings showed that the abuse of Meth and Op causes damage to the brain's functional *** damage included shortening and limiting communication routes and decreased neurons'ability to generate membrane potential and emit inhibitory and excitatory *** were reported to be more severe in the Meth group than in the Op group.

关键词： Electroencephalogram Methamphetamines NeuCube model Opioids Spiking neural networks

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The effect of time and type of stress moderators on yield and yield components of cotton on conventional and double‑cropping systems under saline conditions

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Journal of Cotton Research 2021年第4期4卷 322-336页

作者： BORZOUYI Zeinab ARMIN mohammad marvi Hamid Department of Agronomy and Plant Breeding Sabzevar BranchIslamic Azad UniversitySabzevarIran

Background:Today,stress moderators are employed to mitigate crop loss due to the adverse effects of environmental *** current research aimed to investigate the impacts of time and stress moderator types on agro-physiological responses of cotton on conventional and double-cropping systems during 2017 and 2018 under saline conditions.A split-plot factorial experiment was carried out in a randomized complete block design with three *** system[conventional(recommended planting date)and double-cropping systems(sowing after harvest of wheat)]were considered as the main plots,and stress moderator type at four levels[water control,2 mmol·L^(-1) Salicylic acid(SA),100 mmol·L^(-1) Glycine betaine(GB),and 100μmol·L^(-1) sodium nitroprusside(SNP)]and application time(flowering and flowering+bolling stages)were regarded as ***:Plant height,reproductive branch number,the number of bolls,10-boll weight,1000-seed weight,biological yield,seed cotton yield,lint yield,chlorophyll a,chlorophyll b,carotenoids,total chlorophyll,sodium,potassium,and proline content were less in double-cropping system comparing with conventional *** with the stress moderators alleviated soil salinity effects on yield,yield components,and biochemical traits of *** spraying led to maximum plant height,branch number,the number of bolls per plant,10-boll weight and seed cotton *** spraying yielded the highest 1000-seed weight,biological yield,lint percentage and lint *** highest chlorophyll a,chlorophyll b,carotenoids,and total chlorophyll content resulted from SNP ***,yield components,and biochemical traits did not respond to the stress moderator types in double-cropping ***,the highest chlorophyll a,carotenoids,proline content,the number of bolls per plant,and seed cotton yield resulted from SNP spraying in conventional *** statistically significant differences were observed between spraying with SNP and SA in

关键词： Cotton Glycine betaine Salicylic acid Salinity Sodium nitroprusside Sowing date

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Comparison between compression tested and simulated Mg-6.3Gd bone scaffolds produced by binder based additive manufacturing technique

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Journal of Magnesium and Alloys 2023年第8期11卷 2750-2762页

作者： Martin Wolff mohammad marvi-Mashhadi Eshwara Nidadavolu Henrik Lüneburg Thomas Ebel Regine Willumeit-Römer Institute of Metallic Biomaterials at Helmholtz-Zentrum Hereon Max-Planck Str.1D-21502 GeesthachtGermany Institute of Material Systems Modeling Helmholtz-Zentrum HereonMax–Planck-Str.121502 GeesthachtGermany

In this study,a binder based 3D-printing technology *** Granular Fabrication(FGF)technique was used to produce interconnected and open porous Mg-6.3Gd bone scaffolds for compression test *** consolidation of the green parts(as printed scaffolds)was performed using solvent debinding in cyclohexane and subsequent conventional sintering in argon *** tests were performed on as sintered ***,a simulation strategy was developed for modeling the compression behavior of the sintered parts,utilizing the data from the experimental *** experimental compression test results and the simulation strategy for the compression behavior of the 3D-printed scaffolds demonstrated good agreement.

关键词： Magnesium Mg-6.3Gd Additive manufacturing Simulation FGF Biodegradable

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Isoimperatorin alleviates acetic acid-induced colitis in rats

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Asian Pacific Journal of Tropical Biomedicine 2024年第4期14卷 147-153页

作者： Saied Goodarzi Amir Hossein Abdolghaffari Behnaz Najafi Mostafa Pirali Hamedani Saeed Tavakoli Mahshad marvi Maryam Baeeri Narguess Yassa Abbas Hadjiakhoondi mohammad Abdollahi Zahra Tofighi Medicinal Plants Research Center Faculty of PharmacyTehran University of Medical SciencesTehranIran Department of Toxicology and Pharmacology Faculty of PharmacyTehran Medical SciencesIslamic Azad UniversityTehranIran Department of Pharmacognosy Faculty of PharmacyTehran University of Medical SciencesTehranIran Medicinal Plants Research Center Institute of Medicinal PlantsACECRKarajIran International Campus School of Pharmacy Tehran University of Medical SciencesTehranIran Toxicology and Diseases group The Pharmaceutical Sciences Research CenterTehran University of Medical SciencesTehranIran Department of Toxicology and Pharmacology Faculty of PharmacyTehran University of Medical SciencesTehranIran

Objective:To investigate the effect of isoimperatorin on histopathological and biochemical changes in acetic acid-induced colitis ***:Colitis was induced by intracolonic administration of acetic acid solution(4%v/v)in *** were divided into six groups including the sham group,the negative control group,the dexamethasone-treated group,and the groups treated with isoimperatorin(0.1,1,and 10 mg/kg/d by gavage).The treatments were administered for three days and then colonic status was assessed by macroscopic,histopathological,and biochemical ***:Isoimperatorin significantly alleviated colonic damage in a dose-dependent manner and improved histological changes in rats with acetic acid-induced *** also significantly reduced myeloperoxidase,TNF-α,IL-1β,and malodialdehyde ***:Isoimperatorin alleviates acetic acid-induced colitis in rats and may be a potential therapeutic agent for the treatment of colitis.

关键词： Isoimperatorin Inflammatory bowel disease Acetic acid Colitis TNF-α IL-1β

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