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Effect of Nanostructures Addition and Enhancement of Poly (Vinylidene Difluoride) (PVDF) Energy Harvesting

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Materials Sciences and Applications 2024年第7期15卷 228-244页

作者： omar Peña-oliveras Brenda Javier-Boodhan anthony La Santa Juan Gonzalez-Sanchez Division of Science Technology and Engineering Universidad Ana G. Mndez Carolina Campus Carolina Puerto Rico Department of Electronics University of Puerto Rico Bayamon Campus Bayamon Puerto Rico

With concerns in energy crisis and global warming, researchers are actively investigating alternative energy renewable solutions. Among the various methods, piezoelectric transduction stands out due to its impressive electromechanical coupling factor and coefficient. As a result, piezoelectric energy harvesting has garnered significant attention from the scientific community. In this study, we explored methods to enhance the piezoelectric properties of polyvinylidene fluoride (PVDF) through two distinct approaches. The first approach involved applying external high voltages at various stages during the mixture reaction. The goal was to determine whether this voltage application could alter or enhance PVDF’s piezoelectric conformation by improving the alignment of polarized dipoles. In the second part of our study, we investigated the effects of incorporating various nanostructures (including Iron oxide, Magnesium oxide, and Zinc oxide) into PVDF. To analyze changes in PVDF’s crystalline structure, we utilized Fourier Transform Infrared Spectroscopy (FTIR) and X-ray Diffraction (XRD) techniques. Additionally, we measured the electric polarization of samples using a Precision LC Meter and examined the morphology of nanofibers through Scanning Electron Microscopy (SEM).

关键词： Poly (Vinylidene Fluoride) (PVDF) Energy Harvesting Electrospinning Nanoparticles Zno Mgo Fe3o4

Excess non-CoVID-19-related mortality among inflammatory bowel disease decedents during the CoVID-19 pandemic

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World Journal of Gastroenterology 2024年第20期30卷 2677-2688页

作者： Sarah Rotondo-Trivette Xin-Yuan He Jamil S Samaan Fan Lv Emily Truong Michaela Juels anthony Nguyen Xu Gao Jian Zu Yee Hui Yeo Fan-Pu Ji Gil Y Melmed Department of Medicine Cedars-Sinai Medical CenterLos AngelesCA 90048United States Department of Infectious Disease The Second Affiliated Hospital of Xi’an Jiaotong UniversityXi’an 710004Shaanxi ProvinceChina Karsh Division of Gastroenterology and Hepatology Department of Medicine Cedars-Sinai Medical CenterLos AngelesCA 90048United States School of Mathematics and Statistics Xi’an Jiaotong UniversityXi’an 710049Shaanxi ProvinceChina David Geffen School of Medicine University of CaliforniaLos AngelesLos AngelesCA 90095United States Division of Gastroenterology The Second Affiliated Hospital of Xi’an Jiaotong UniversityXi’an 710004Shaanxi ProvinceChina National and Local Joint Engineering Research Center of Biodiagnosis and Biotherapy The Second Affiliated Hospital of Xi’an Jiaotong UniversityXi’an 710004Shaanxi ProvinceChina Key Laboratory of Surgical Critical Care and Life Support(Xi’an Jiaotong University) Ministry of EducationXi’an 710004Shaanxi ProvinceChina

BACKGRoUND The coronavirus disease 2019(CoVID-19)pandemic disrupted healthcare in the United *** To investigate CoVID-19-related and non-CoVID-19-related death and characteristics associated with excess death among inflammatory bowel disease(IBD)*** We performed a register-based study using data from the National Vital Statistics System,which reports death data from over 99%of the United States population,from January 1,2006 through December 31,***-related deaths among adults 25 years and older were stratified by age,sex,race/ethnicity,place of death,and primary cause of *** and actual age-standardized mortality rates(ASMRs)per 100000 persons were *** 49782 IBD-related deaths occurred during the study ***-CoVID-19-related deaths increased by 13.14%in 2020 and 18.12%in 2021[2020 ASMR:1.55 actual vs 1.37 predicted,95%confidence interval(CI):1.26-1.49;2021 ASMR:1.63 actual vs 1.38 predicted,95%CI:1.26-1.49].In 2020,non-CoVID-19-related mortality increased by 17.65%in ulcerative colitis(UC)patients between the ages of 25 and 65 and 36.36%in non-Hispanic black(NHB)Crohn’s disease(CD)*** the pandemic,deaths at home or on arrival and at medical facilities as well as deaths due to neoplasms also *** IBD patients suffered excess non-CoVID-19-related death during the *** death was associated with younger age among UC patients,and with NHB race among CD *** death at home or on arrival and due to neoplasms suggests that delayed presentation and difficulty accessing healthcare may have led to increased IBD mortality.

关键词： Inflammatory bowel disease Ulcerative colitis Crohn’s disease CoVID-19 Excess death Race Sex Disparities

Physicochemical and Thermal Properties of Some Key Tropical Sawdust Woods for Energy Production

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Journal of Sustainable Bioenergy Systems 2024年第1期14卷 1-22页

作者： Davy Fiwa Kaoke Yann Le Brech Emmanuel Talla anthony Dufour Patrick Mountapmbeme Kouotou Department of Chemical Engineering School of Chemical Engineering and Mineral Industries University of Ngaoundere Ngaoundere Cameroon National Advanced School of Engineering of Maroua University of Maroua Maroua Cameroon Laboratory of Reactions and Process Engineering University of Lorraine-France Nancy France Higher Institute of Agriculture Wood Water and Environment University of Ebolowa Ebolowa Cameroon

In South Saharan countries, 85% of the population uses biomass as a primary energy source. Cameroon presents one of the highest biomass energy and sawmills produce important sawdust resources which are not used and are burnt in piles leading to significant air toxic emissions. Therefore, we have to valorize industrially these available sawdusts. This study focuses on the physicochemical and thermochemical analysis of Ayous, Sapelli and Tali sawdust. The proximate and ultimate analysis, particle size, structural composition, as well as heavy metal content and calorific value were determined. In addition, the thermogravimetric mass losses were also estimated. The results showed that high water contents (24% - 41%) were recorded in the raw sawdust, and the thermal treatment reduced these contents from 78% to values in the range of 4% - 9%. The values for ash and volatile matter content were respectively between 0.25% - 0.74% and 68% - 76%. The LHV is higher in Ayous (17.5 MJ/kg) and Sapelli (16.8 MJ/kg) than that of Tali (15.7 MJ/kg). The concentration of heavy metals is very low in each species. Extractives are more present in Tali (16.06%) than in the other sawdusts. Pyrolysis of sawdust shows the typical decomposition of hemicellulose (270˚C - 325˚C), cellulose (325˚C - 400˚C) and lignin (200˚C - 550˚C) with a maximum loss of 75% at 370˚C and the melting point is 320˚C. The results of the sawdust parameters determined in the paper can be valorized to reduce pollutants emissions by developing the efficiency and effectiveness of biomass energy processes and promoting the use of biomass as a sustainable alternative to traditional fossil fuels.

关键词： Wood Sawmills Sawdust Combustion Energy

Comparative Study of the Socioeconomic Characteristics and Digital Literacy Level of Agricultural Extension Personnel in Imo and Ebonyi States, South-East, Nigeria

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Agricultural Sciences 2024年第2期15卷 230-245页

作者： ogbonnaya okoro Aja Cyril Chigozie Asiabaka anthony okorie Ani Edna Chioma Matthews-Njoku Department of Agricultural Extension Federal University of Technology Owerri Nigeria

The study comparatively analysed the socioeconomic characteristics and digital literacy level of Agricultural Extension personnel (AEP) in Ebonyi and Imo States, South-East, Nigeria. The specific objectives were to describe the socioeconomic characteristics of agricultural extension personnel in Ebonyi and Imo States, and to ascertain the digital literacy level of AEP in the studied states. Purposive sampling technique was used to select 312 Agricultural Extension personnel (132 from Ebonyi State Agricultural Development Program and 180 from Imo State Agricultural Development Program) for the study. Data were collected through the use of validated and structured questionnaire, and administered through the help of well-trained enumerators. Data were analysed using simple descriptive statistical tools such as percentages mean score, standard deviation and weighted mean. Findings indicated that they were more male in the both States (55.3% and 57.8%) for Ebonyi and Imo State respectively and that the average age of AEP in Ebonyi and Imo States were 44.7 years and 49.2 years respectively. It was further revealed that the majority (77.3% and 82.8%) had ***./HND as their highest academic qualifications, belonged to professional organisations (62.1% and 75%), and were earning an average monthly income of N58,798 and N62,648 for Ebonyi and Imo State respectively. Also, it was revealed that their mean years of service were 12.4 years and 13.4 years for Ebonyi and Imo State respectively. Almost all of them (87.9% and 95.0%) own a smartphone, had access to the internet (80.3% and 90.0%), but do not own a laptop/ipad (82.6% and 72.8%) for Ebon-yi and Imo State respectively. Results further revealed that Agricultural extension personnel in both Ebonyi and Imo State respectively had low digital literacy level ( = 2.41 and 2.32). The study concluded that AEP in Ebonyi and Imo State respectively had similar socioeconomic characteristics and low level of digital literacy. The study

关键词： Agricultural Extension Personnel Digital Literacy Ebonyi State Imo State Socioeconomic Characteristics

Analysis of the Digital Skill Gap of Agricultural Extension Personnel in South-East, Nigeria

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Agricultural Sciences 2024年第9期15卷 1057-1070页

作者： ogbonnaya okoro Aja Chigozie Cyril Asiabaka anthony okorie Ani Edna Chioma Matthews-Njoku Department of Agricultural Extension Federal University of Technology Owerri Nigeria

The study analysed the digital skill gap of agricultural extension personnel on the use of digital technologies for extension services delivery in South-East, Nigeria. The specific objectives were to describe the socioeconomic characteristics of agricultural extension personnel in South-East Nigeria and identify the digital skill gaps among agricultural extension personnel in the area of study. Purposive sampling technique was used to select 364 Agricultural Extension personnel for the study. Data were collected through the use of structured questionnaire and were analysed using simple descriptive statistical tools such as percentages, mean score, and standard deviation. Findings indicated that most of the personnel were male (57.8%), within the age bracket of 38 - 47 years (62.9%), had ***./HND as their highest educational qualification (74.7%), married (86.3%), and had a household size of 6 - 10 Persons (57.7%). It was further revealed that the majority (70.1%) were members of professional organization, earned a monthly income of N50,001.00 - N100,000.00 (65.7%), had a work experience of 11 - 15 years (51.1%), and owned a smartphone/ iPad/laptop (91.5%). Findings further indicated that they had moderate skill gap in Basic Computer skills (Mean = 4.32), and digital communication and collaboration skills (Mean = 4.26). Findings also showed that they had a high skill gap in digital technical skills (Mean = 2.46), digital data analysis skills (Mean = 2.09), digital content creation skills (Mean = 2.43), digital ethical skills (Mean = 2.79), multimedia production skills (Mean = 2.81), and video library management skills (Mean = 2.39). The study concluded that though there exists a high digital skill gap among agricultural extension personnel in South-East, Nigeria, their socioeconomic characteristics are capable of supporting the implementation of digital extension services in the area. The study recommended that the management of Agricultural Development Programs in

关键词： Agricultural Extension Personnel Socioeconomic Characteristics Digital Skill Gap South-East Nigeria

Pleiotropic attenuating effect of Ginkgo biloba against isoprenalineinduced myocardial infarction via improving Bcl-2/mToR/ERK1/2/Na^(+) , K^(+) -ATPase activities

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Chinese Herbal Medicines 2024年第2期16卷 282-292页

作者： Jerome Ndudi Asiwe Abodunrin Adebayo ojetola Nwoke Enekabokom Ekene Esthinsheen osirim anthony Chibuzor Nnamudi Benjamin oritsemuelebi Jackson Erozueme onuelu Nicholas Asiwe Harrison ogheneochuko Eruotor Saviour Inegbenehi Department of Physiology Delta State UniversityAbraka 1Nigeria Department of Physiology University of IbadanIbadan 3017Nigeria Department of Physiology Adeleke UniversityEde 250Nigeria Department of Pharmacology Rivers State UniversityNkpolu-Oroworukwo 5080Nigeria Department of Physiology Redeemer’s UniversityEde 230Nigeria Department of Biochemistry PAMO University of Medical SciencesPort Harcourt 500211Nigeria Department of Pharmacology Delta State UniversityAbraka 1Nigeria Department of Anatomy University of Port HarcourtChoba 5323Nigeria Department of Medical Laboratory Sciences University of Port HarcourtChoba 5323Nigeria

objective:Myocardial infarction(MI)is linked to an imbalance in the supply and demand of blood oxygen in the heart ***-blockers and calcium antagonists are just two of the common medications used to treat ***,these have reportedly been shown to be either ineffective or to have undesirable side *** of Ginkgo biloba leaves(GBE),a Chinese herbal product offers special compatibility benefits in therapeutic settings relating to inflammatory diseases and oxidative *** order to better understand how GBE affects MI in rats insulted by isoprenaline(ISo),the current study was ***:The heart weight index,serum lipid profile,cardiac marker enzymes,endogenous antioxidants[catalase(CAT),superoxide dismutase(SoD),glutathione(GSH),nitrites and malondialdehyde(MDA)],inflammatory mediators[tumour necrosis factor alpha(TNF-a)and interleukin-6(IL-6)],immunohistochemical expressions of B-cell lymphoma factor-2(Bcl-2),extracellular signal-regulated kinase(ERK1/2),and mammalian target of rapamycin(mToR)and histopathological analysis were used to assess the cardioprotective properties of ***:The findings showed that GBE effectively attenuated myocardial infarction by boosting the body’s natural antioxidant defense system and reducing the release of inflammatory cytokines as well as heart injury marker *** expression of Bcl-2,ERK1/2 and mToR was increased while the histomorphological alterations were ***:The cardioprotective effects of GBE may be due to a mechanism involving increased Bcl-2/mToR/ERK1/2/Na^(+),K^(+)-ATPase activity.

关键词： antioxidants extracellular signal-regulated kinase Ginkgo biloba extract isoprenaline mammalian target of rapamycin myocardial infarction Na^(+),K^(+)-ATPase

Simultaneous portal vein thrombosis and splenic vein thrombosis in a CoVID-19 patient:A case report and review of literature

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World Journal of Clinical Cases 2024年第18期12卷 3561-3566页

作者： Binyamin Ravina Abramowitz Michael Coles Ayse Aytaman Bani Chander-Roland Daniel anthony DiLeo Department of Gastroenterology and Hepatology SUNY Downstate Health Sciences UniversityBrooklynNY 11203United States Department of Gastroenterology and Hepatology Brooklyn Campus of the Veterans Affairs New York Harbor Healthcare SystemBrooklynNY 11209United States

BACKGRoUND It is well-described that the coronavirus disease 2019(CoVID-19)infection is associated with an increased risk of thrombotic *** there have been many cases of pulmonary emboli and deep vein thrombosis in these patients,reports of CoVID-19 associated portal vein thrombosis(PVT)have been *** present a unique case of concomitant PVT and splenic artery thrombosis in a CoVID-19 *** SUMMARY A 77-year-old-male with no history of liver disease presented with three days of left-sided abdominal *** week earlier,the patient was diagnosed with mildly symptomatic CoVID-19 and was treated with nirmatrelvir/*** exam revealed mild right and left lower quadrant tenderness,but was otherwise *** laboratory findings included white blood cell count 12.5 K/μL,total bilirubin 1.6 mg/dL,aminoaspartate transferase 40 U/L,and alanine aminotransferase 61 U/*** tomography of the abdomen and pelvis revealed acute PVT with thrombus extending from the distal portion of the main portal vein into the right and left *** noted was a thrombus within the distal portion of the splenic artery with resulting splenic *** workup including prothrombin gene analysis,factor V Leiden,cardiolipin antibody,and JAK2 mutation were all *** with enoxaparin was initiated,and the patient’s pain *** was discharged on *** It is quite uncommon for PVT to present simultaneously with an arterial thrombotic occlusion,as in the case of our *** thrombotic manifestations are classically linked to hypercoagulable states including malignancy and hereditary and autoimmune *** infections such as Epstein-Barr virus,cytomegalovirus,viral hepatitis,and CoVID-19 have all been found to increase the risk of splanchnic venous occlusions,including *** our patient,prompt abdominal imaging led to early detection of thrombus,early treatment,and an exce

关键词： CoVID-19 Thromboembolism Portal vein thrombosis Splenic artery thrombosis Anticoagulation Lovenox Thrombotic complication Case report

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船难十周年

财新周刊 2024年第16期 12-13页

作者： anthony Wallace(图) 视觉中国

当地时间2024年4月16日,韩国全罗南道木浦,“世越号(Sweol)”沉船事故十周年悼念活动上,人们为遇难者默哀。2014年4月16日,载有476人的“世越号”客轮在前往济州岛途中,在全罗南道珍岛郡附近海域忽然发生严重倾斜,并最终沉没,事故造成30... 详细信息

当地时间2024年4月16日,韩国全罗南道木浦,“世越号(Sweol)”沉船事故十周年悼念活动上,人们为遇难者默哀。2014年4月16日,载有476人的“世越号”客轮在前往济州岛途中,在全罗南道珍岛郡附近海域忽然发生严重倾斜,并最终沉没,事故造成304名乘客和船上工作人员死亡,其中包括261名京道安山市檀园高中的高二学生和教师。“世越号”沉船事故是韩国最严重的海难之一。

关键词：高二学生全罗南道济州岛遇难者韩国十周年

Potential Driving Systems Associated with Extreme Rainfall across East Africa during october to December (oND) Season 2019

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Journal of Geoscience and Environment Protection 2024年第7期12卷 25-49页

作者： Constantine Ingeri Wang Wen Joseph Ndakize Sebaziga Vedaste Iyakaremye Samuel Ekwacu Prosper Ayabagabo anthony Twahirwa Jonah Kazora School of Atmospheric Sciences Nanjing University of Information Science and Technology Nanjing China Rwanda Meteorology Agency (Meteo Rwanda) Kigali Rwanda School of Science and Technology University of Rwanda (UR-CST) Kigali Rwanda Climate and Clean Air Coalition Secretariat Paris France Rwanda Environment Management Authority (REMA) Kigali Rwanda Uganda National Meteorological Authority (UNMA) Kampala Uganda Department of Earth and Climate Science University of Nairobi Nairobi Kenya

The East African (EA) region highly experiences intra-seasonal and inter-annual variation in rainfall amounts. This study investigates the driving factors for anomalous rainfall events observed during the season of october-November-December (oND) 2019 over the region. The study utilized daily rainfall data from Climate Hazards Group InfraRed Precipitation with Station Data Version 2 (CHIRPSv2) and the driving systems data. Statistical spatiotemporal analysis, correlation, and composite techniques were performed to investigate the teleconnection between oND 2019 seasonal rainfall and global synoptic climate systems. The findings showed that the oND 2019 experienced seasonal rainfall that was twice or greater than its seasonal climatology and varied with location. Further, the oND 2019 rainfall showed a positive correlation with the Indian ocean Dipole (IoD) (0.81), Nino 3 (0.51), Nino 3.4 (0.47), Nino 4 (0.40), Pacific Decadal oscillation (PDo) (0.22), and North Tropical Atlantic (NTA) (0.02), while El Nino-Southern oscillation (ENSo) showed a negative correlation (−0.30). The region was dominated by southeasterly warming and humid winds that originated from the Indian ocean, while the geopotential height, vertical velocity, and vorticity anomalies were closely related to the anomalous rainfall characteristics. The study deduced that the IoD was the major synoptic system that influenced maximum rainfall during the peak season of oND 2019. This study therefore provided insights on the diagnosis study of oND 2019 anomalous rainfall and its attribution over the EA. The findings of the study will contribute to improvements in forecasting seasonal rainfall by regional climate centers and national meteorological centers within the region.

关键词： East Africa Driving Climate Systems october-November-December (oND) 2019 Rainfall