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  • Open Access



    Jing Hua,* , Mingxing Dub

    Frontiers in Heat and Mass Transfer, Vol.14, No.1, pp. 1-7, 2020, DOI:10.5098/hmt.14.5

    Abstract Inert gases are conveniently used for leak detection. Relative to CO2, majority of the inert gases are non-condensable. It is of great significance to understand the effects of residual non-condensable gases on the performance of a refrigeration system. This paper investigates, both theoretically and experimentally, on the impact of residual non-condensable gases on the performance of a carbon dioxide (CO2) evaporator and the system performance. A theoretical analysis indicates that residual non-condensable gases can convert homogeneous nucleation into a heterogeneous nucleation process and accelerate phase change, thus, reducing superheat or incipient boiling temperature. To investigate the influence of residual non-condensable… More >

  • Open Access



    Isam Mejbel Abed, Farooq H. Ali* , Shaymaa Abdul Munem Sahib

    Frontiers in Heat and Mass Transfer, Vol.15, No.1, pp. 1-9, 2020, DOI:10.5098/hmt.15.6

    Abstract Forced and mixed convection in 2-D, steady state, laminar flow and heat transfer around sinusoidal corrugated circular cylinder are numerically studied. Finite Element of Galerkin approach is used to analyze continuity, momentum and energy equation at Reynolds number (Re = 01, 45, 100, 200), Richardson Number (Ri=0, 1, 2), corrugation number (G = ꚙ, 3, 4, 5, 10), amplitude values (λ= 0.1, 0.2, 0.3 and 0.6) for Prandtl number (Pr = 0.71). Results show the variation of corrugation number G and amplitude value λ have important effect on the streamline , isothermal lines, local and average Nusselt number around the… More >

  • Open Access

    Analysis of Subcellular Localization and Pathogenicity of Plum Bark Necrosis Stem-Pitting Associated Virus Protein P6

    Yuanyuan Li1,#, Jinze Mu2,#, Qingliang Li1, Huabing Liu3, Xuefeng Yuan2,*, Deya Wang1,*

    Phyton-International Journal of Experimental Botany, Vol.92, No.7, pp. 2079-2085, 2023, DOI:10.32604/phyton.2023.028237

    Abstract Infection of plum bark necrosis stem pitting associated virus (PBNSPaV) has been reported in many Prunus species in several countries, causing significant economic losses. The very small proteins encoded by plant viruses are often overlooked due to their short sequences and uncertain significance. However, numerous studies have indicated that they might play important roles in the pathogenesis of virus infection. The role of small hydrophobic protein P6, encoded by the open reading frame 2 of PBNSPaV, has not been well explored. In this study, we amplified the P6 fragment from a PBNSPaV isolate by RT-PCR using specific primers and found… More >

  • Open Access


    Pollination Biology of the Endangered Herbal Medicines Dendrobium chrysotoxum (Orchidaceae)

    Kai Luo1, Yanbing Bai1, Yan Jiang1, Guiling Li1, Min Jia1, Yongguo He1, Zhijun Yao1, Ziwei Xiao1, Xiaoqiong Liu1, Wenjie Liu2, Shanshan Yin1,*, Zesheng Li1,*

    Phyton-International Journal of Experimental Botany, Vol.92, No.7, pp. 1975-1986, 2023, DOI:10.32604/phyton.2023.028232

    Abstract Pollination biology studies of the endangered herbal medicines Dendrobium chrysotoxum were conducted in natural pollination conditions using flower observation, pollinator observation and artificial pollination experiments. Populations of D. chrysotoxum with fragrance and nectar were pollinated by Ctenoplectra davidi Valhalla (Hymenoptera: Apidae) species. The floral structure of D. chrysotoxum adapted precisely to its pollinators. Flowers had a low capsule setting (0.17%) under natural conditions. However, compared to open pollination, artificial pollination experiments showed a significant increase in capsule setting, and D. chrysotoxum was cross-compatible and self-compatible, but there was pollinator limitation also. This study will provide important information for the preservation… More >

  • Open Access


    A Review on Selenium Function under Oxidative Stress in Plants Focusing on ROS Production and Detoxification

    Armin Saed-Moucheshi1,*, Elham Rezaei Mirghaed2

    Phyton-International Journal of Experimental Botany, Vol.92, No.7, pp. 1921-1941, 2023, DOI:10.32604/phyton.2023.027810


    One of the main reasons of the annual reduction in plant production all around the world is the occurrence of abiotic stresses as a result of an unpredicted changes in environmental conditions. Abiotic stresses basically trigger numerous pathways related to oxygen free radicals’ generation resulting in a higher rate of reactive oxygen species (ROS) production. Accordingly, higher rate of oxygen free radicals than its steady state causes to oxidize various types of molecules and compartments within the plants’ cells and tissues. Oxidative stress is the result of high amount free radicals of oxygen interfering with different functions leading to undergo… More >

  • Open Access


    Analyse spatiotemporelle des tournées de livraison d’une entreprise de livraison à domicile

    Khaled Belhassine1,3, Jacques Renaud1,2,3, Leandro Coelho1,2,3,4, Jean-Philippe Gagliardi5

    Revue Internationale de Géomatique, Vol.29, No.2, pp. 207-230, 2019, DOI:10.3166/rig.2019.00090

    Abstract In this article, we present a spatio-temporal analysis of delivery routes from GPS points of private vehicles. Several thousand GPS geolocation observations obtained from this delivery routes are collected, processed and map matched to the road network. As a result of these spatio-temporal analyzes, we develop daily congestion index calendars as a function of the time of the day. The sectorial congestion ratios are computed and used to determine the best delivery departure times, in order to avoid road congestion. Using data from our industrial partner, our analyzes indicate a potential reduction of 22% of the duration of the delivery… More >

  • Open Access


    Utilisation du modèle PAP/CAR et du SIG pour un zonage du risque d’érosion hydrique

    Exemple du bassin versant de Tessa (Tunisie)

    Nassira Zouaoui, Radhia Mansour, Abdessalem El Ghali

    Revue Internationale de Géomatique, Vol.29, No.3, pp. 361-380, 2019, DOI:10.3166/rig.2020.00096

    Abstract In the humid Mediterranean regions, particularly the NW of Tunisia, the Tessa catchment area is characterized by torrential and irregular rains, combined with significant deforestation, which causes severe erosion that carries away and redistributes the soil. The process of water erosion is very frequent and changes its dynamic aspect according to the evolution and spatial variation of the lithological nature of rocks, the geomorphology of landscapes, the geometry of watersheds and their bioclimatic situation. In this study, an appropriate methodological flowchart was followed by applying the PAP/RAC erosion mapping method, which is based on the principle of weighting the main… More >

  • Open Access


    Étude de la vulnérabilité à la pollution du système phréatique du sahel de Sfax par les outils SIG

    Nadia Trabelsi, Imen Hentati, Ibtissem Triki, Moncef Zairi

    Revue Internationale de Géomatique, Vol.29, No.3, pp. 317-338, 2019, DOI:10.3166/rig.2019.00087

    Abstract The Sfax phreatic system is an important source of water supply. The latter is constantly threatened by nitric pollution. In order to protect this aquifer, a study of the intrinsic vulnerability has been carried out using the SI (Susceptibility Index) method. The model takes into consideration the various vulnerability criteria governing the process of contaminant transfer. These are geological, hydrogeological, land use, topography, and meteorological factors. In this study, a method derived from the SI model is presented (modified SI). The model is based on an approach that integrates hydrological modeling under Agriflux and GIS. Indeed, the use of GIS… More >

  • Open Access


    Élaboration d’une application SIG pour un aménagement intégré du littoral de la préfecture de Tanger-Assilah (Maroc)

    Rabii El Hamzaoui, Ahmed Raissoun, Amal Ouahi, Abdelkrim El Arri

    Revue Internationale de Géomatique, Vol.29, No.3, pp. 297-315, 2019, DOI:10.3166/rig.2019.00083

    Abstract Tangier-Assilah prefecture coast, situated in the furthest north-west of Morocco Kingdom constitutes an important attraction center for many socioeconomic activities and shelters an environmental varied rich and vulnerable patrimony.The integrated management of this complex space involves a thorough knowledge of its functioning and evolution, themselves are reliant on several physical socioeconomic and statutory factors, which interact at different spatiotemporal scales. And for such a purpose, the GIS represents an adequate implement for collecting, managing, processing and spreading abroad a huge amount of diverse sources and natures data.The aim of this current work is the implementation of a coastal Geographic Information… More >

  • Open Access


    Senescent mesenchymal stem/stromal cells in pre-metastatic bone marrow of untreated advanced breast cancer patients


    Oncology Research, Vol.31, No.3, pp. 361-374, 2023, DOI:10.32604/or.2023.028104

    Abstract Breast cancer is the predominant form of carcinoma among women worldwide, with 70% of advanced patients developing bone metastases, with a high mortality rate. In this sense, the bone marrow (BM) mesenchymal stem/stromal cells (MSCs) are critical for BM/bone homeostasis, and failures in their functionality, transform the BM into a pre-metastatic niche (PMN). We previously found that BM-MSCs from advanced breast cancer patients (BCPs, infiltrative ductal carcinoma, stage III-B) have an abnormal profile. This work aims to study some of the metabolic and molecular mechanisms underlying MSCs shift from a normal to an abnormal profile in this group of patients.… More >

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