scholarly journals A Note on the Result of Precise Levelling in the Littoral Region of Etigo and Sinano

1928 ◽  
Vol 4 (2) ◽  
pp. 56-59
Author(s):  
Akitune IMAMURA
Keyword(s):  
Precise Levelling ◽  
Littoral Region

scholarly journals Detection of diarrhoea associated rotavirus and co-infection with diarrhoeagenic pathogens in the Littoral region of Cameroon using ELISA, RT-PCR and Luminex xTAG GPP assays

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Rahinatou N. Ghapoutsa ◽  
Maurice Boda ◽  
Rashi Gautam ◽  
Valantine Ngum Ndze ◽  
Akongnwi E. Mugyia ◽  
...  
Keyword(s):  
Demographic Data ◽  
Laboratory Diagnosis ◽  
Epidemiological Studies ◽  
Sub Saharan Africa ◽  
Rt Pcr ◽  
Mortality And Morbidity ◽  
Vaccine Introduction ◽  
Littoral Region ◽  
Rotavirus Vaccines ◽  
The Impact

Abstract Background Despite the global roll-out of rotavirus vaccines (RotaTeq/Rotarix / ROTAVAC/Rotasiil), mortality and morbidity due to group A rotavirus (RVA) remains high in sub-Saharan Africa, causing 104,000 deaths and 600,000 hospitalizations yearly. In Cameroon, Rotarix™ was introduced in March 2014, but, routine laboratory diagnosis of rotavirus infection is not yet a common practice, and vaccine effectiveness studies to determine the impact of vaccine introduction have not been done. Thus, studies examining RVA prevalence post vaccine introduction are needed. The study aim was to determine RVA prevalence in severe diarrhoea cases in Littoral region, Cameroon and investigate the role of other diarrheagenic pathogens in RVA-positive cases. Methods We carried out a study among hospitalized children < 5 years of age, presenting with acute gastroenteritis in selected hospitals of the Littoral region of Cameroon, from May 2015 to April 2016. Diarrheic stool samples and socio-demographic data including immunization and breastfeeding status were collected from these participating children. Samples were screened by ELISA (ProSpecT™ Rotavirus) for detection of RVA antigen and by gel-based RT-PCR for detection of the VP6 gene. Co-infection was assessed by multiplexed molecular detection of diarrheal pathogens using the Luminex xTAG GPP assay. Results The ELISA assay detected RVA antigen in 54.6% (71/130) of specimens, with 45, positive by VP6 RT-PCR and 54, positive using Luminex xTAG GPP. Luminex GPP was able to detect all 45 VP6 RT-PCR positive samples. Co-infections were found in 63.0% (34/54) of Luminex positive RVA infections, with Shigella (35.3%; 12/34) and ETEC (29.4%; 10/34) detected frequently. Of the 71 ELISA positive RVA cases, 57.8% (41/71) were fully vaccinated, receiving two doses of Rotarix. Conclusion This study provides insight on RVA prevalence in Cameroon, which could be useful for post-vaccine epidemiological studies, highlights higher than expected RVA prevalence in vaccinated children hospitalized for diarrhoea and provides the trend of RVA co-infection with other enteric pathogens. RVA genotyping is needed to determine circulating rotavirus genotypes in Cameroon, including those causing disease in vaccinated children.

Particulate light attenuation in a large subtropical lake

1995 ◽  
Vol 52 (8) ◽  
pp. 1803-1811 ◽  
Author(s):  
Karl E. Havens
Keyword(s):  
Surface Water ◽  
Trophic State ◽  
Nutrient Loading ◽  
Light Attenuation ◽  
Algal Growth ◽  
Progressive Increase ◽  
Trophic State Index ◽  
Littoral Region ◽  
Relative Contribution ◽  
Total Light

Deviations among Carlson's trophic state index values were used to quantify a 12-year history of seston composition and underwater light attenuation in Lake Okeechobee, Florida, U.S.A. Deviations between chlorophyll a, total phosphorus, and transparency-based trophic state indices indicated that (i) light attenuation is generally dominated by phosphorus-rich abiotic particles; (ii) abiotic light attenuation is maximal in a central lake region overlying soft mud sediments, and minimal in a near-littoral region overlying hard sand; and (iii) there has been a progressive increase in the relative contribution of algal pigments to total light attenuation between 1980 and 1992. Coincident with that 12-year trend, there have been declines in external nitrogen loads, lake water nitrogen:phosphorus ratios, and wind velocities. Surface water temperatures in the lake have significantly increased. Explanations for the trend in light attenuation include (i) more favorable meteorological conditions for algal growth, which increased the contribution of algae to overall light attenuation and (ii) reduced nitrogen:phosphorus ratios favoring proliferation of buoyant cyanobacteria, which are more effectively sampled by surface water monitoring. In either case, the trend did not coincide historically with enhanced nutrient loading, the common cause of algal proliferation in lakes.

scholarly journals HEIGHT DETERMINATION TECHNIQUES FOR THE NEXT NATIONAL HEIGHT SYSTEM OF FINLAND - A CASE STUDY

2015 ◽  
Vol 41 (4) ◽  
pp. 145-155
Author(s):  
Timo Saari ◽  
Markku Poutanen ◽  
Veikko Saaranen ◽  
Harri Kaartinen ◽  
Antero Kukko ◽  
...  
Keyword(s):  
Laser Scanning ◽  
Pilot Project ◽  
Satellite System ◽  
Reference Station ◽  
Virtual Reference ◽  
Precise Levelling ◽  
Height Determination ◽  
Weak Points ◽  
Global Navigation Satellite

Precise levelling is known for its accuracy and reliability in height determination, but the process itself is slow, laborious and expensive. We have started a project to study methods for height determination that could decrease the creation time of national height systems without losing the accuracy and reliability that is needed for them. In the pilot project described here, we study some of the alternative techniques with a pilot field test where we compared them with the precise levelling. The purpose of the test is not to evaluate the mutual superiority or suitability of the techniques, but to establish the background for a larger test and to find strong and weak points of each technique. The techniques chosen for this study were precise levelling, Mobile Laser Scanning (MLS) and Global Navigation Satellite System (GNSS) levelling, which included static Global Positioning System (GPS) and Virtual Reference Station (VRS) measurements. This research highlighted the differences of the studied techniques and gave insights about the framework and procedure for the later experiments. The research will continue in a larger scale, where the suitability of the techniques regarding the height systems is to be determined.

Morphological, yielding and quality descriptors of four clones of Origanum spp. (Lamiaceae) from the Argentine Littoral region Germplasm bank

2010 ◽  
Vol 32 (3) ◽  
pp. 472-480 ◽  
Author(s):  
G. Farías ◽  
O. Brutti ◽  
R. Grau ◽  
P. Di Leo Lira ◽  
D. Retta ◽  
...  
Keyword(s):  
Germplasm Bank ◽  
Littoral Region

scholarly journals Flushing the Lake Littoral Region: The Interaction of Differential Cooling and Mild Winds

2021 ◽  
Author(s):  
Cintia Luz Ramón Casañas ◽  
Hugo N. Ulloa ◽  
Tomy Doda ◽  
Damien Bouffard
Keyword(s):  
Lake Littoral ◽  
Littoral Region

scholarly journals Isognomon bicolor (C. B. Adams, 1845) (Mollusca: Bivalvia): first record of this invasive species for the States of Paraíba and Alagoas and new records for other localities of Northeastern Brazil

Check List ◽  
2013 ◽  
Vol 9 (1) ◽  
pp. 157 ◽  
Author(s):  
Thelma Lúcia Pereira Dias ◽  
Ellori Laíse Silva Mota ◽  
Anne Isabelley Gondim ◽  
Jacicleide Macedo Oliveira ◽  
Emanuelle Fontenele Rabelo ◽  
...  
Keyword(s):  
Invasive Species ◽  
New Record ◽  
New Records ◽  
Rio Grande ◽  
First Record ◽  
The State ◽  
Northeastern Brazil ◽  
Northeast Brazil ◽  
Littoral Region ◽  
Exotic Invasive

This study provides the first record of the exotic invasive bivalve Isognomon bicolor for the State of Paraíba, Northeastern Brazil. It has been found to occur in at least twelve coastal reefs along the coast. We also present its first record for the State of Alagoas and new record localities for the States of Rio Grande do Norte and Pernambuco, including its occurrence in hypersaline estuaries. From these records the distribution range of I. bicolor has been expanded to the littoral region of Northeast Brazil, where this invasive species seems well established.

scholarly journals Raffia Forest Exploitation and Socio-Economic Development within Nkongsamba Urban Council

2020 ◽  
pp. 70-80
Author(s):  
Gideon Samba ◽  
Japhet Chianebeng Kuma
Keyword(s):  
Economic Development ◽  
Forest Products ◽  
Systematic Sampling ◽  
Sample Population ◽  
Forest Exploitation ◽  
Littoral Region ◽  
Qualitative Approaches ◽  
Socio Economic Development ◽  
The Relationship ◽  
Forest Activities

In Nkongsamba of the Littoral region, raffia palms exploitation have offered an impressive assortment of products for food,  housing construction and households equipment to many of the community members who greatly depend on this Non-Timber Forest Products (NTFPs) for livelihood. This study examines the relationship between raffia forest exploitation and socio-economic development within the Nkongsamba urban council in the Littoral Region of Cameroon. To achieve the main aim of the study, specific objectives were set to examine the socio-economic activities related to raffia forest exploitation in Nkongsamba, assess the relationship between raffia forest activity and socio-economic development of Nkongsamba. Data for the study were obtained through primary and secondary sources using a mixed design method of inquiry which combines both quantitative and qualitative approaches to explore data on raffia forest and its related activities in the study area. Purposive and systematic sampling techniques were equally employed for a sample population of 155 that was drawn using Miller & Brewer Sample determination Method (2003). The data generated were analysed with descriptive and inferential statistics using Statistical Package for Social Sciences (SPSS) version 20. The major results from the analysis of the findings indicate that raffia activities have contributed enormously to socio-economic development. The researcher used linear regression statistics to determine if raffia forest activities have any significant impact on socio-economic development at .05 significant levels. The results showed that the calculated p-value .014 was not up to the significant level .05 placed for the study. This therefore accepts the fact that raffia forest activities have significant effect on socio-economic development. Base on this finding, the study recommended that, in view of the fact that raffia exploitation is the main economic base activity to majority of households in the area under study, the government should enact appropriate polices to promote the potentials of raffia farming households. Such households should be provided with inputs such as improved raffia harvesting materials at affordable rates.

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