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Acute Toxicity and Behavioural Responses of African Catfish,Clarias gariepinus to Amine Salt of 2,4-D

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应用与环境生物学报 2010年第3期16卷 347-352页

作者： GABRIEL Ugwemgorubong Ujagwung MACAULAY Bonny koffi EDORI Onisogen Simeon Department of Fisheries and Aquatic Environment Rivers State University of Science and Technology Bayelsa State Agricultural Development Programme Ministry of Agriculture Department of Chemistry Rivers State University of Education

Fingerlings of African catfish,Clarias gariepinus [mean total length,(7.0±1.0) cm SD;mean weight,(3.0±0.7) g SD] were exposed to acute concentrations of amine salt of 2,4-D(0,50,200,250,350,and 400 mg/L) to determine the behavioural responses and *** raised in aquaria the fish became *** beat frequencies(opercular and tail beat frequency per minute,OBF and TBF) of the exposed fish declined with increase in the exposure duration and concentration,but the reverse was the case with percent *** variables signifi cantly differed at both the exposure duration and concentration of the toxicant(Phip(Phighest concentration was 20.41(11.87～27.46) *** results from this study revealed that 2,4-D was very toxic to *** under laboratory conditions and its application should therefore,be restricted in the field.

关键词： acute toxicity 2,4-D Clarias gariepinus opercular behavioural change

Improved germination of threatened medicinal Prunus africana for better domestication: effects of temperature, growth regulators and salts

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Journal of Forestry Research 2020年第6期31卷 2403-2411页

作者： Justine Germo Nzweundji koffi Konan Leopold MNyochembeng Nehemie Donfagsiteli Tchinda Nicolas Niemenak Department of Biological Science Higher Teacher Training CollegeUniversity of Yaounde IPO Box 47Yaounde´Cameroon Centre for Research on Medicinal Plants and Traditional Medicine Institute of Medical Research and Medicinal Plants Studies(IMPM)PO Box 6163Yaounde´Cameroon IngateyGen LLC Elizabeth CityNCUSA Department of Natural Resources and Environmental Sciences Alabama A&M UniversityHunstvilleALUSA

Prunus africana is an endangered medicinal species and has been classified as a priority for domestication in ***,the seeds rapidly lose their viability during storage at room temperature after 2–3 *** study aimed to improve seed germination of *** by germinating at different temperatures(4℃,28℃)using different concentrations of growth stimulators(sodium nitrate and gibberellic acid)and different concentrations of *** seeds had 91.7%germination at 4C after 1 month of *** regulators considerably influenced germination after 6 months and reached 66.0%with 10 mM gibberellic acid and 100%with 10 mM sodium *** three shoots per seed were developed,an indication of *** analyses revealed the presence of protein-like bodies close to the embryo axis and accumulations of starch after 7 days of *** 14 days,amyloplasts and dark protein bodies of various sizes were *** outcome of this study will contribute to improve the germination of *** for better domestication and conservation.

关键词： Conservation Germination Growth regulators histochemical analyses Prunus africana Temperature

Innovation and strategy: Does it make a difference! A linear study of micro & SMEs

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International Journal of Innovation Studies 2020年第4期4卷 105-115页

作者： Kevin blanchard Department of Strategy and Enterprise Lincoln International Business SchoolUniversity of LincolnUK

Innovation is known to be used by some businesses to help them differentiate their trading position within a specific *** has also proven that by adopting a strategy,aims can be achieved and turnover *** study will endeavour to use these two key areas to evaluate how,they are used and to what extent they can improve business *** study was carried using 145 Micro and SME business,located within the rural county of *** businesses were taken from specific locations on a random basis which included rural,remote rural and urban *** findings found that businesses situated within remote areas performed better than those within the other test areas,leading to the conclusion that they use innovation as a strategy to outperform their business rivals.

关键词： Business Entrepreneurship Strategy Rural

The Role of Public Health Within the United Nations Post-2015 Framework for Disaster Risk Reduction

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International Journal of Disaster Risk Science 2015年第1期6卷 28-37页

作者： Virginia Murray Amina Aitsi-Selmi Kevin blanchard Public Health Strategy Division Public Health England

This article explores the role of public health systems before, during, and after disasters, particularly within the scope of the United Nations Post-2015 Framework for Disaster Risk Reduction. It also examines the role of scientific and technological developments in assisting with improving the resilience of public health professionals and the communities they work in. In addition, it explores how the wide-ranging activities in public health have already contributed to the improved management of disasters and a decrease in associated risks. The article identifies areas of synergy in five key areas of recent policy and practice in public health(the health systems approach, risk assessments, the WHO/UNISDR/HPA Disaster Risk Management fact sheets, chronic disease and disasters, and mental health impacts following disasters) and makes suggestions based on lessons identified from the previous(2005) global disaster risk reduction framework. In particular, we advocate the use of scientific evidence that addresses health and disaster risk simultaneously to increase the effectiveness of policy and practice in disaster risk reduction, health, and public health.

关键词： Disaster risk reduction Health systems Post-2015 framework Public health Risk assessments

high efficiency GHz laser processing with long bursts

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International Journal of Extreme Manufacturing 2023年第1期5卷 202-210页

作者： eric Audouard eric Mottay Amplitude PessacFrance

Bursts of GHz repetition rate pulses involve more ablation mechanisms than single femtosecond *** ablation by GHz laser pulses is a multi-step process,consisting of a first thermal incubation phase,followed by a highly efficient ablation *** ablation therefore combines thermal and non-thermal ablation *** an optimal choice of the burst duration,the ablation efficiency can be highly *** bursts,comprising tens of pulses to hundreds of pulses,are needed to take full advantage of the increase in ablation efficiency.

关键词： femtosecond laser temporal pulses shaping GHz bursts femtosecond processing

The Sendai Framework for Disaster Risk Reduction and Its Indicators——Where Does Health Fit in?

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International Journal of Disaster Risk Science 2017年第2期8卷 150-155页

作者： Rishma Maini Lorcan Clarke Kevin blanchard Virginia Murray Public Health Registrar in Global Disaster Risk Reduction Public Health England Research Analyst Intern in Global Disaster Risk Reduction Public Health England Senior Environmental Scientist in Global Disaster Risk Reduction Public Health England Public Health Consultant in Global Disaster Risk Reduction Public Health England United Nations International Strategy for Disaster ReductionScientific and Technical Advisory Group Integrated Research on Disaster Risk Reduction Scientific Committee

The Sendai Framework for Disaster Risk Reduction 2015–2030 recognizes the strong connection between health and disasters and promotes the concept of health resilience *** of the seven global targets stated in the Sendai Framework are directly related to health in terms of reducing disaster mortality,the number of affected people,disaster damage to critical infrastructure,and disruption of basic services such as health *** Sendai Framework also maintains close coordination with other United Nations landmark agreements relevant to health such as the Sustainable Development ***,the measurement of healthrelated indicators is *** arise,for example,in linking deaths to disasters because of the complex interplay between exposure,risk,vulnerability,and *** lack of a universal classification of disasters also means that recording of health data in disasters is not *** the guidelines to enable data onthe indicators to be collected and reported to support the Sendai targets requires detailed thinking,time,and consultation with a diverse range of *** collaboration and partnership will be vital to achieving success.

关键词： Disaster risk reduction Global health targets Health indicators Sendai Framework

Study of the Stability during Aging of Mixed Cashew and Papaya Wine Produced with Palm Wine Sediment

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Food and Nutrition Sciences 2022年第2期13卷 181-194页

作者： Jean Ives Kablan Gnoumou Doudjo Soro blanchard G. A. Adou Gnagne Ernest K. koffi Food Chemical and Environmental Process Sciences Félix Houphou&#235 t-Boigny National Polytechnic Institute Yamoussoukro Ivory Coast Laboratory of Biochemistry Agriculture and Biological Ressource Valorization Faculty of Biosciences Félix Houphou&#235 t-Boigny University Abidjan Ivory Coast

During the ageing of wine, many reactions occur generating enormous modifications. After pasteurization (65°C/5minutes) of the mixed cashew apple and papaya wine, physicochemical, microbiological and sensory analyses were performed during the two (2) months of aging. The results showed no significant variation between the young wine and the one aged for two (2) months for pH, titratable acidity, alcoholic percentage and density. However, for ESR, vitamin C, total anthocyanins and aroma a significant difference (p ≤ 0.05) was observed. This difference was observed during the first 45 days and then stabilized until the sixtieth day. Values ranged from 6.3°B to 5.5°B;from 84.65 ± 0.6 to 77.9 ± 0.2 mg/100mL;from 165.5 ± 0.8 to 50.25 ± 0.3 mg/100mL for RDE, vitamin C and total anthocyanins respectively. For aroma, there was more development between the young wine and the one aged for two months. Concerning the sanitary quality, there is a progressive decrease of the different germs during the aging period. Except for yeasts, which are undetectable, the load of aerobic mesophilic germs and lactic acid bacteria varies respectively from 3.5 × 105 to 1.4 × 105 CFU/mL and from 1.5 × 105 to 1 × 105 CFU/mL.

关键词： Stability Aging Wine Sediment Papaya Cashew Apple

Rb-Sr isotope dating of silicalite from the Dajiangping massive sulfide ore deposit,Guangdong Province

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Chinese Science Bulletin 1997年第23期42卷 1983-1985页

作者： Wang, hi Li, HY Wang, YX Wang, HH Nanjing Univ Dept Earth Sci Nanjing 210093 Peoples R China

THE Dajiangping pyrite ore deposit located in the Yunfu County of Guangdong Province is asuper-large pyrite ore deposit. Its age has not been defined so far because of the absence of fos-sil. This note is to use Rb-Sr isotope dating of silicalite to constrain the age of the ore depositand place special emphasis on its geological significance.

关键词： pyrite ore deposit silicalite Rb-Sr isotope ore-forming age.

Understanding the Variability of Z-R Relationships Caused by Natural Variations in Raindrop Size Distributions(DSD):Implication of Drop Size and Number

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Atmospheric and Climate Sciences 2011年第3期1卷 147-164页

作者： Abe D.Ochou eric-Pascal Zahiri Bakary Bamba Manlandon koffi Laboratoire de Physique de l’Atmosphere et Mecanique des fluides(LAPA-MF) Universite de Cocody-AbidjanAbidjanCote d’Ivoire Institut National Polytechnique Houphouet-Boigny YamoussoukroCote d’Ivoire

In the issue of rainfall estimation by radar through the necessary relationship between radar reflectivity Z and rain rate R (Z-R), the main limitation is attributed to the variability of this relationship. Indeed, several pre-vious studies have shown the great variability of this relationship in space and time, from a rainfall event to another and even within a single rainfall event. Recent studies have shown that the variability of raindrop size distributions and thereby Z-R relationships is therefore, more the result of complex dynamic, thermody-namic and microphysical processes within rainfall systems than a convective/stratiform classification of the ground rainfall signature. The raindrop number and size at ground being the resultant of various processes mentioned above, a suitable approach would be to analyze their variability in relation to that of Z-R relation-ship. In this study, we investigated the total raindrop concentration number NT and the median volume di-ameter D0 used in numerous studies, and have shown that the combination of these two ‘observed’ parame-ters appears to be an interesting approach to better understand the variability of the Z-R relationships in the rainfall events, without assuming a certain analytical raindrop size distribution model (exponential, gamma, or log-normal). The present study is based on the analysis of disdrometer data collected at different seasons and places in Africa, and aims to show the degree of the raindrop size and number implication in regard to the Z-R relationships variability.

关键词： Raindrop Size Distribution Radar Reflectivity Factor Rain Rate Median Volume Diameter Total Number of Drops Per Unit Volume Z-R Relationship Convective Rain Stratiform Rain Squall Lines Thunderstorm