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| 1 | Dynamic connectedness between stock markets in the presence of the COVID‑19 pandemic:does economic policy uncertainty matter?显示文摘This study investigates the dynamic connectedness between stock indices and the effect of economic policy uncertainty(EPU)in eight countries where COVID-19 was most widespread(China,Italy,France,Germany,Spain,Russia,the US,and the UK)by implementing the time-varying VAR(TVP-VAR)model for daily data over the period spanning from 01/01/2015 to 05/18/2020.Results showed that stock markets were highly connected during the entire period,but the dynamic spillovers reached unprecedented heights during the COVID-19 pandemic in the first quarter of 2020.Moreover,we found that the European stock markets(except Italy)transmitted more spillovers to all other stock markets than they received,primarily during the COVID-19 outbreak.Further analysis using a nonlinear framework showed that the dynamic connectedness was more pronounced for negative than for positive returns.Also,findings showed that the direction of the EPU effect on net connectedness changed during the pandemic onset,indicating that information spillovers from a given market may signal either good or bad news for other markets,depending on the prevailing economic situation.These results have important implications for individual investors,portfolio managers,policymakers,investment banks,and central banks. | Manel Youssef Khaled Mokni Ahdi Noomen Ajmi | 2021 | Financial Innovation2021，7，1： | 2 |
| 2 | Effects of Barium Stress in Brassica juncea and Cakile maritima:The Indicator Role of Some Antioxidant Enzymes and Secondary Metabolites显示文摘Soil contamination by toxic trace metal elements,like barium(Ba),may stimulate various undesirable changes in the metabolic activity of plants.The plant responses are fast and with,direct or indirect,generation of reactive oxygen species(ROS).To cope with the stress imposed by the ROS production,plants developed a dual cellular system composed of enzymatic and non-enzymatic players that convert ROS,and their by-products,into stable nontoxic molecules.To assess the Ba stress response of two Brassicaceae species(Brassica juncea,a glycophyte,and Cakile maritime,a halophyte),plants were exposure to different Ba concentrations(0,100,200,300 and 500µM).The plants response was evaluated through their morphology and development,the determination of plant leaves antioxidant enzymatic activities and by the production of plants secondary metabolites.Results indicated that the two Brassicaceae species have the ability to survive in an environment containing Ba(even at 500µM).The biomass production of C.maritima was slightly affected whereas an increase in biomass B.juncea was noticed.The stress imposed by Ba activated the antioxidant defense system in the two species,noticed by the changes in the leaves activity of catalase(CAT),ascorbate peroxidase(APX)and guaicol peroxidase(GPX),and of the secondary metabolites,through the production of total phenols and flavonoids.The enzymatic response was not similar within the two plant species:CAT and APX seem to have a more important role against the oxidative stress in C.maritima while in B.juncea is GPX.Overall,total phenols and flavonoids production was more significant in the plants aerial part than in the roots,of the both species.Although the two Brassicaceae species response was different,in both plants catalytic and non-catalytic transformation of ROS occurs,and both were able to overcome the Ba toxicity and prevent the cell damage. | Houda Bouslimi Renata Ferreira Nesrine Dridi Pedro Brito Susete Martins-Dias Isabel Caçador Noomene Sleimi | 2021 | Phyton-International Journal of Experimental Botany2021，90，1： | 2 |
| 3 | Auto- immune pancreatitis mimicking pancreatic cancer显示文摘 | Mohamed Hammami Faouzi Noomen Omar Toumi | 2011 | N Am J Med Sci2011，3，11： | 1 |
| 4 | Multiplex ligation de- pendent probe amplification (MLPA) for rapid distinction between u- nique sequence positive and negative marker chromosomes in prenatal diagnosis显示文摘 | Van Opstal D Boter M Noomen P | 2011 | Mol Cytogenet2011，4，： | 1 |
| 5 | Mechanism of dehydration inactivation of Lactobacillus plantarum显示文摘 | LIEVENSE L C VERBEEK M A M NOOMEN A | 2007 | Appl Microbiol Biotechnol2007，41，： | 1 |
| 6 | Improvement of functional properties and antioxidant activities of cuttlefish ( Sepia officinalis ) muscle proteins hydrolyzed by Bacillus mojavensis A21 proteases显示文摘 | Noomen Hmidet Rafik Balti Rim Nasri Assaad Sila Ali Bougatef Moncef Nasri | 2011 | Food Research International2011，，9： | 1 |
| 7 | Mechanism of dehydration inactivation of Lactobacillus plantaum显示文摘 | Lievense L C Verbeek M A M Noomen A | 1994 | Applied Microbiology and Biotechnology1994，41，： | 1 |
| 8 | Hyperproduetion of pectinase activities by a fully constitutive mutant (CY1) of PeniciUium occitanis显示文摘 | Hadj-Taieb Noomen Ayadi Malika Tfigui Samah | 2002 | Enzyme and Microbial Technology2002，30，5： | 1 |
| 9 | Multi- and hyperspectral geologic remote sensing: A review显示文摘 | Freek D. van der Meer Harald M.A. van der Werff Frank J.A. van Ruitenbeek Chris A. Hecker Wim H. Bakker Marleen F. Noomen Mark van der Meijde E. John M. Carranza J. Boudewijn de Smeth Tsehaie Woldai | 2011 | International Journal of Applied Earth Observations and Geoinformation2011，，1： | 1 |
| 10 | The effects of high soil CO2 concentrations on leaf reflectance of maize plants显示文摘 | Noomen M F Skidmore A K | 2009 | International Journal of Remote Sensing2009，30，2： | 1 |
| 11 | Colourful UV cured coatings显示文摘 | Noomen A | 1981 | J Oil Col Chem Assoc1981，64，： | 1 |
| 12 | Crustal deformations in the Mediterranean area com- puted from SLR and GPS observations 显示文摘 | NOOMEN R SPRINGER T A AMBROSIUS B A C | 1996 | J Geodyn1996，21，： | 1 |
| 13 | Photosynthetic Behaviour and Mineral Nutrition of Tamarix gallica Cultivated Under Aluminum and NaCl Combined Stress显示文摘The lack of knowledge of plant tolerance and differential response to aluminum(Al)encouraged many researchers,in the last decade,to elucidate Al toxicity and tolerance mechanisms.The current study reported the impact of Al,a toxic element with negative effects on plant growth and development,in halophytic plant Tamarix gallica.Plants were subjected to different Al concentrations(0,200,500 and 800μM)with or without NaCl(200 mM)supplementation.Growth,photosynthesis and mineral content were assessed.Al stress had a significant decrease on shoots’biomass production between 19 to 41%,and a little variation on chlorophyll content and photosynthetic efficiency(Fo,Fm,Fv fluorescence’s and Fv/Fm).Furthermore,the Al-treatments did not affect significantly the content of potassium,calcium,and magnesium in different plant parts,whereas NaCl addition to the medium induced a decrease in these elements’concentrations.Our results have shown that T.gallica is able to accumulate the high levels of Al in shoots and roots,6288μg.g^(-1) DW and 7834μg.g^(-1) DW respectively.It is considered as a hyperaccumulator plant of Al.In addition,Na+contents in shoots and roots exceed 23000μg.g^(-1) DW.Therefore,T.gallica presents a high tolerance at the same time to Al and NaCl phytotoxicity,so it is interesting to use in phytoremediation programs. | Dhouha Belhaj Sghaier Insaf Bankaji Sylvia Pedro Isabel Caçador Noomene Sleimi | 2019 | Phyton-International Journal of Experimental Botany2019，88，3： | 1 |
| 14 | Crustal motions in the Mediterranean Region determined from Laser ranging to LAGEOS 显示文摘 | Noomen R Ambrosius B A C Wakker K F | 1993 | Geodynamics Series1993，23，： | 1 |
| 15 | Mechanism of dehydration inactivation of Lactobacillus plantaum显示文摘 | Lievense L C Verbeek M A M Noomen A | 1994 | Applied Microbiology and Biotechnology1994，41，： | 1 |
| 16 | Multiplex ligation dependent probe amplification (MLPA) for rapid distinction between unique sequence positive and negative marker chromosomes in prenatal diagnosis显示文摘 | Van Opstal D Boter M Noomen P | | 0，，02： | 1 |
| 17 | The effects of high soilCO2 concentrations on leaf reflectance of maize plants显示文摘 | Noomen M F Skidmore A K | 2009 | International Journal of Remote Sensing2009，30，2： | 1 |
| 18 | Hyperspectralindices for detecting changes in canopy reflectance as aresult of underground natural gas leakage显示文摘 | Noomen M F Smith K L Colls J J | 2008 | InternationalJournal of Remote Sensing2008，29，20： | 1 |
| 19 | Finite difference discretization of the extended Fisher-Kolmogorov equation in two dimensions 显示文摘 | Noomen Khiari Khaled Omrani | 2011 | Computers and Mathematics with Applications2011，，62： | 1 |
| 20 | Multiplex liga- tion dependent probe amplification(MLPA) for rapid dis- tinction between unique sequence positive and negative marker chromosomes in prenatal diagnosis显示文摘 | Van Opstal D Boter M Noomen P | 2011 | Mol Cyto- genet2011，4，： | 1 |
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