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Satellite monitoring of land-use and land-cover changes in northern Togo protected areas

Journal of Forestry Research 2014年第2期25卷 385-392页

作者： Fousseni Folega Chun-yu Zhang Xiu-hai Zhao Kperkouma Wala Komlan Batawila Hua-guo Huang marra dourma Koffi Akpagana The Key Laboratory for Silviculture and Conservation of Ministry of Education Beijing Forestry University Université de Lomé Laboratoire de botanique et écologie végétaleFaculté des sciences

Remote-sensing data for protected areas in northern Togo, obtained in three different years （2007, 2000, and 1987）, were used to assess and map changes in land cover and land use for this drought prone zone. The normalized difference vegetation index （NDVI） was applied to the images to map changes in vegetation. An unsupervised classification, followed by classes recoding, filtering, identifications, area computing and post-classification process were applied to the composite of the three years of NDVI images. Maximum likelihood classification was applied to the 2007 image （ETM＋2007） using a supervised classification process. Seven vegetation classes were defined from training data sets. The seven classes included the following biomes： riparian forest, dry forest, flooded vegetation, wooded savanna, fallows, parkland, and water. For these classes, the overall accuracy and the overall kappa statistic for the classi- fied map were 72.5% and 0.67, respectively. Data analyses indicated a great change in land resources; especially between 1987 and 2000 proba- bly due to the impact of democratization process social, economic, and political disorder from 1990. Wide-scale loss of vegetation occurred during this period. However, areas of vegetation clearing and regrowth were more visible between 2000 and 2007. The main source of confusion in the contingency matrix was due to heterogeneity within certain classes. It could also be due to spectral homogeneity among the classes. This research provides a baseline for future ecological landscape research and for the next management program in the area.

关键词： land change NDVI land cover protected areas Northern Togo

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Assessment and impact of anthropogenic disturbances in protected areas of northern Togo

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Forestry Studies in China 2012年第3期14卷 216-223页

作者： Folega FOUSSENI dourma marra Kperkouma WALA Komlan BATAWILA ZHANG Chun-yu ZHAO Xiu-hai Koffi AKPAGANA Key Laboratory for Silviculture and Conservation of Ministry of Education Beijing Forestry University Beijing 100083 E R. China Universite de Loree Laboratoire de Botanique et d'Ecologie Vegetale Faculte des Sciences Lome BP 1515 Togo

These days, human activities in the savanna and the remaining dry and riparian forests of the Sudanian ecoregions continue to have their impact. These anthropogenic practices are still the main cause of disturbances in these areas. In order to investigate and assess the importance of these disturbances, caused by people bordering on protected areas and to determine the relation between these activities and the environment in which they are carried out, 220 samples were selected in the three main protected areas of northern Togo. The investigation was mainly qualitative, considering the floristic sampling of this drought area; any anthropogenic activities observed were recorded. A simple investigative questionnaire about the activities of rural people in the reserved areas was distributed to individuals encountered in the study area. Each sample in the investigation ended with a site description of its ecologi- cal characterization, i.e., soil features, topography, fauna footprints, dominant plant species and GPS position; we also took photo- graphs of the site. Data processing was entirely based on descriptive statistics and a factor analysis. The results show that eight kinds of human activities, i.e., the use of pastures, tree cutting, bush fires, charcoal production, harvesting of plant material, fanning, honey harvesting and hunting, were noted to be serious disturbances to the integrity of the ecosystems. Among these disturbances, three are recurrent in all the sampled areas of which the use of pastures accounts for 31.88%, tree cutting for 30.35% and bush fires for 30.13%. Fire and pasture disturbances are closely linked and are responsible for the current features of the savanna area of the region. Tree cutting is more a direct function of the need for the production of wood fuel, generally used by city populations. Hunting, farm- ing and honey production are of lesser importance in the area and therefore, do not pose a significantly negative effect on the gr

关键词： disturbances protected areas seasonal migration anthropogenic impact Togo

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Long Term Evaluation of Green Vegetation Cover Dynamic in the Atacora Mountain Chain(Togo) and its Relation to Carbon Sequestration in West Africa

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Journal of Mountain Science 2015年第4期12卷 921-934页

作者： Fousseni FOLEGA Yao Agbélessessi WOEGAN dourma marra Kperkouma WALA Komlan BATAWILA Jean Leonardo SEBURANGA ZHANG Chun-yu PENG Dao-li ZHAO Xiu-hai Koffi AKPAGANA Université de Lomé Laboratoire de botanique et écologie végétale Faculté des Sciences The Key Laboratory for Forest Resources & Ecosystem Processes of Beijing Beijing Forestry University Department of Biology Faculty of Science National University of Rwanda

The research was done in the Atacora Mountain chain in Togo which tended to assess the change of vegetation cover during a 24-year *** also aims to evaluate the dynamic of the net primary productivity(NPP) of the living plants over the same *** Landsat imagery covering three different periods(1987, 2000, and 2011) was pre-processed to correct atmospheric and radiometric parameters as well as gapfilling the 2011 SCL-off ***, the vegetation indices such as NDVI(normalized difference vegetation index), SR(simple ratiovegetation index), SAVI(soil-adjusted vegetation index), and CASA(carnegie- ames- stanford approach)model for NPP were applied on these images after masking the study *** results showed a quiet decrease in the vegetation *** vegetation loss was more significant from 2000 to 2011 than from1987 to 2000, and anthropogenic activities can be deemed as the main cause of the vegetation *** biomass assessment by NPP computation also showed a decrease over the *** to the change of the vegetation cover, the ecosystem net productivity was very low in 2011 compared to 2000 and *** seems that the general health condition of thevegetation, including its potentiality in carbon sinking,was negatively affected in this area, which has already been under threatened.A perpetual monitoring of these ecosystems by means of efficient techniques could enhance the sustainable management tools of in the framework of reducing emissions from deforestation and forest degradation(REDD).

关键词： Vegetation cover NPP Carbon sinking Biomass Togo

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Botanical Assessment of Forest Genetic Resources Used in Traditional Cosmetic in Togo （West Africa）

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Journal of Life Sciences 2012年第8期6卷 931-938页

作者： Hodabalo Pereki Komlan Batawila Kperkouma Wala marra dourma Semihinva Akpavi Koffi Akpagana Messanvi Gbeassor Jean-Luc Ansel Laboratory of Botany and Plant Ecology University of Lome Lome P o. Box 1515 Togo Laboratory of Pharmacology-Physiology of Natural Substance University of Lome Lome Po. Box 1515 Togo Cosmetic Valley I Place de la Cathddrale Chartres 28000 France

In the current context of REDD＋ opportunities, it is important to evaluate forest genetic resources for local communities＇ benefits. The aim of this ethnobotanical survey with an emphasis in cosmetopoeia--by referring to the word pharmacopoeia--was to explore, investigate, collect and identify natural resources used in traditional cosmetic in Togo for that purpose. The specific objectives were （i） to inventory plant species used as cosmetic in Togolese ethnocultural groups, and （ii） to describe their biological forms for their sustainable use. Based on ethnobotanical approach, this survey identified through multistage sampling design and semi-structured interview, 177 plant species belonging to 167 genera and 59 families with 82.45% dicotyledonous and 17.55% monocotyledonous species. According to life forms, these species were distributed as ligneous （56.50%） and herbaceous （43.50%）. The computation of Whittaker＇s Index of Association led to three communities of ethnic groups. The explanatory effect of the ethnic based-tradition was significant and confirmed by Monte Carlo permutation test （P = 0.0020） after 499 permutations under split-plot constraints. This first outline confirmed ethnobotany as a viable tool in search for plant genetic resources in cosmetic industries. These findings could be incorporated into future conservation management plans of forest genetic resources in Togo and other tropical countries.

关键词： Cosmetic ethnobotany forest genetic resources Togo.

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Quick and easy assessment of sarcopenia in cirrhosis: Can ultrasound be the solution?

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World Journal of Gastroenterology 2024年第17期30卷 2287-2293页

作者： Francesca Campani Tancredi Vincenzo Li Cavoli Umberto Arena Fabio marra Erica Nicola Lynch Claudia Campani Department of Health Science University Hospital CareggiUniversity of FlorenceFlorence 50134Italy Internal Medicine and Liver Unit University Hospital CareggiUniversity of FlorenceFlorence 50134Italy Department of Experimental and Clinical Medicine University of FlorenceFlorence 50134Italy Gastroenterology Research Unit Department of Experimental and Clinical Biomedical Sciences“Mario Serio”University of FlorenceFlorence 50134Italy Department of Medical Biotechnologies University of SienaSiena 53100Italy

Cirrhosis is frequently associated with sarcopenia,with reported rates of over 80%in patients with decompensated alcohol-related liver *** nega-tively impacts the prognosis of cirrhotic patients and affects the response to treatment of patients with hepatocellular carcinoma(HCC).For these reasons,identifying an easy-to-perform method to assess sarcopenia in is a key element in the optimization of care in this patient *** of muscle mass by computed tomography is considered the standard of care for the diagnosis of sarcopenia,but exposure to radiation and high costs limit its application in this setting,especially for repeated *** believe that ultrasound,a cheap and harmless technique also used for HCC screening in cirrhotic patients,could have an expanding role in the diagnosis and follow-up of sarcopenia in these patients.

关键词： Sarcopenia Ultrasound Cirrhosis Hepatocellular carcinoma Computed tomography

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Post Cryopreservation Growth Kinetic and Photosynthetic Assessment of an Acid Tolerant Strain of Stichococcus bacillaris

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Natural Resources 2024年第5期15卷 130-148页

作者： Marzia Licata Luigi marra Nunzia Nappi Elena Aurino Feliciana Oliva Antonino De Natale Donato Giovannelli Antonino Pollio Department of Biology University of Naples &#8220Federico II&#8221 Naples Italy ACUF Algal Collection of University of Naples &#8220Federico II&#8221 Naples Italy Department of Chemical Materials and Industrial Production Engineering University of Naples &#8220Federico II&#8221 P.le V. Tecchio Naples Italy Institute for Marine Biological Resources and Biotechnologies Italian National Research Council CNR-IRBIM Ancona Italy Earth-Life Science Institute ELSI Tokyo Institute of Technology Tokyo Japan Marine Chemistry and Geochemistry Department Woods Hole Oceanographic Institution Woods Hole MA USA Department of Marine and Coastal Science Rutgers University New Brunswick NJ USA

Preserving microbial diversity has become a strategic undertaking. Thus, ex situ microalgal culture conservation results in strategic and functional resource in both biodiversity protection and application domains. Cryopreservation of microalgae has been practiced since the 1960s and is now considered the optimal preservation strategy. Furthermore, the overall monitoring during growth of cultures after freezing/thawing protocols was hardly investigated and there is poor evaluation related to preserve especially the photosystem apparatus. The present study focuses on Stichococcus bacillaris as case study for short-term cryopreservation at −80 °C storage. Various freezing pretreatments using cryoprotective agents, and two thawing methods were compared introducing a novel variable to evaluate viability recovery and assessing growth kinetics of cultures immediately after thawing and after a series batch cultivation. Photosynthetic rate and pigments assessment were proposed to evaluate hidden metabolic cell damage. Results underline cryoprotective agents can increase the kinetic recovery of preserved cells in terms of reduction of lag phase during batch cultivation tests: the use of dimethyl sulfoxide and glycerol granted a growth comparable to unpreserved cells when sudden thawing occurs after 24 hours of storage, but recovery after preservation is less sensitive to cryoprotective agents when gradual thawing and 1 month of storage is considered. However, cells are always able to restore their physiological pathways even without agents, so their kinetic effect has been proved and quantified. Interestingly, both the photosynthetic efficiency and the ratio between total chlorophyll and carotenoids are comparable (0.75 Fv/Fm, 2.2 ± 0.25 g/g) to unpreserved cells and they are unsensitive to chosen agents, but the ratio between chlorophyll a and chlorophyll b was clearly altered (up to 10 times), suggesting that photoactive pigments relative proportions

关键词： Microalgae Stichococcus bacillaris Cryopreservation Growth Kinetic Photosynthetic Rate

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Concerns about the application of resistance exercise with blood-flow restriction and thrombosis risk in hemodialysis patients

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Journal of Sport and Health Science 2024年第4期13卷 548-558,F0003页

作者： Hugo de Luca Correa Lysleine Alves Deus Dahan da Cunha Nascimento Nicholas Rolnick Rodrigo Vanerson Passos Neves Andrea Lucena Reis Thais Branquinho de Araujo Carmen Tzanno-Martins Fernanda Silveira Tavares Luiz Sinesio Silva Neto Claudio Avelino Rodrigues Santos Paolo Lucas Rodrigues-Silva Fernando Honorato Souza Vitoria marra da Motta Vilalva Mestrinho Rafael Lavarini dos Santos Rosangela Vieira Andrade Jonato Prestes Thiago dos Santos Rosa Post-graduate Program of Physical Education Catholic University of BrasıliaBrasılia 71966-700Brazil The Human Performance Mechanic Lehman CollegeNew YorkNY 10011USA Clinical Group Home Dialysis Center and RenalClass Sao Paulo 01239-040Brazil Department of Medicine Catholic University of BrasıliaBrasılia 71966-700Brazil Faculty of Medicine Federal University of TocantinsTocantins 77001-090Brazil Embrapa Genetic Resources and Biotechnology Brasılia 70770-917Brazil Graduate Program of Genomic Sciences and Biotechnology Brasılia 71966-700Brazil

Background:Hemodialysis(HD) per se is a risk factor for *** the growing body of evidence on blood-flow restriction(BFR) exercise in HD patients,identification of possible risk factors related to the prothrombotic agent D-dimer is required for the safety and feasibility of this training *** aim of the present study was to identify risk factors associated with higher D-dimer levels and to determine the acute effect of resistance exercise(RE) with BFR on this ***:Two hundred and six HD patients volunteered for this study(all with a glomerular filtration rate of 70 years old),and HD ***,RE+BFR significantly increases D-dimer after 4 *** with borderline baseline D-dimer levels(400-490 ng/mL) displayed increased risk of elevating D-dimer over the normal range(≥500 ng/mL).Conclusion:These results identified factors associated with a heightened prothrombotic state and may assist in the screening process for HD patients who wish to undergo RE+BFR.D-dimer and/or other fibrinolysis factors should be assessed at baseline and throughout the protocol as a precautionary measure to maximize safety during RE+BFR.

关键词： Blood-flow restriction Chronic kidney disease Coagulation Hemodialysis Vascular occlusion exercises

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The Use of VGPM to Estimate Oceanic Primary Production:A“Tango”Difficult to Dance

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Journal of Remote Sensing 2022年第1期2022卷 139-145页

作者： Zhongping Lee John F.marra State Key Lab of Marine Environmental Science College of Earth and Ocean SciencesXiamen UniversityXiamenChina School for the Environment University of Massachusetts BostonBostonMA 02125USA Brooklyn College of the City University of New York BrooklynNY 11210USA

One of the primary goals of launching an ocean color satellite is to obtain over the global ocean synoptic measurements of primary production(PP),a measure of phytoplankton *** reach this ultimate goal,in addition to precise measurements of radiance at the satellite altitude and robust data processing systems,a key requirement is to link primary production with satellitederived products,where a model must be developed and *** many models have been developed in the past decades,the vertically generalized production model(VGPM)developed by Behrenfeld and Falkowski,due to its simplicity and ease of use with satellite products,has been a de facto“standard”for the estimation of PP from ocean color measurements over the past 20+***,it has significantly influenced the ocean color remote sensing and the biological oceanographic *** this article,we discuss the limitations of VGPM(and PP models based on chlorophyll concentration)in estimating primary production.

关键词： Dance simplicity precise

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Developments in diagnosis and management of post-liver transplantation biliary complications:the radiologist’s perspective

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Hepatobiliary Surgery and Nutrition 2022年第3期11卷 457-461页

作者： Paolo marra Pietro Andrea Bonaffini Davide Ippolito Sandro Sironi Department of Radiology Papa Giovanni XXIII HospitalBergamoItaly School of Medicine University of Milano-BicoccaMilanItaly Department of Diagnostic Radiology San Gerardo HospitalMonzaItaly

Biliary complications are the most common source of morbidity after liver transplantation as they may occur in up to 45%of patients(1).The review by Magro et al.(2)provides comprehensive insights on this topic and offers a cue for in-depth remarks form a radiological perspective regarding both diagnostic and interventional ***(US)-based techniques,including B-mode and color-Doppler,are the milestone of post-transplant *** assessment of graft vascularization is crucial since many biliary complications are supposed to be induced by arterial *** this regard,however,it must be emphasized that US imaging is hampered by a limited panoramic view,especially in difficult abdomens,therefore it is not possible to rely exclusively on this technique.

关键词： diagnosis complications graft

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Delayed-release oral mesalamine tablet mimicking a small jejunal gastrointestinal stromal tumor:A case report

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World Journal of Clinical Cases 2022年第19期10卷 6710-6715页

作者： Fabio Frosio Emanuele Rausa Paolo marra Marie-Christine Boutron-Ruault Alessandro Lucianetti Department of General Surgery ASST Papa Giovanni XXIII HospitalBergamo 24127Italy Department of Radiology ASST Papa Giovanni XXIII HospitalBergamo 24127Italy Paris-Saclay University UVSQInsermGustave RoussyExposome and Heredity TeamCentre for Epidemiology and Population Health(CESP U1018)Villejuif 94800France

BACKGROUND Enteric-coated medications are supposed to pass intact through the gastric environment and to release the drug content into the small intestine or the *** dissolution of the enteric coating,they may appear hyperdense on computed tomography(CT).Unfortunately,few reports have been published on this topic so *** this case report,the hyperdense appearance on contrastenhanced CT of an enteric-coated mesalamine tablet was initially misinterpreted as a jejunal gastrointestinal stromal tumor(GIST).CASE SUMMARY An asymptomatic 81-year-old male patient,who had undergone laparoscopic right nephrectomy four years earlier for stage 1 renal carcinoma,was diagnosed with a jejunal GIST at the 4-year follow-up thoraco-abdominal CT *** was referred to our hub hospital for gastroenterological evaluation,and subsequently underwent 18-fluorodeoxyglucose positron emission tomography,abdominal magnetic resonance imaging,and video capsule *** of these examinations detected any lesion of the small *** reviewing all the CT images in a multidisciplinary setting,the panel estimated that the hyperdense jejunal image was consistent with a tablet rather than a *** tablet was an 800 mg delayed-release enteric-coated oral mesalamine tablet(Asacol®),which had been prescribed for non-specific colitis,while not informing the hospital *** Delayed-release oral mesalamine(Asacol®),like other enteric-coated medications,can appear as a hyperdense image on a CT scan,mimicking a small intestinal ***,adetailed knowledge of the patients’medications and a multidisciplinary review of the images areessential.

关键词： Mesalamine Enteric-coating Asacol Tablet Gastrointestinal stromal tumor Case report

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