25 research outputs found
Cohort Profile: Burden of Obstructive Lung Disease (BOLD) study
The Burden of Obstructive Lung Disease (BOLD) study was established to assess the prevalence of chronic airflow obstruction, a key characteristic of chronic obstructive pulmonary disease, and its risk factors in adults (≥40 years) from general populations across the world.
The baseline study was conducted between 2003 and 2016, in 41 sites across Africa, Asia, Europe, North America, the Caribbean and Oceania, and collected high-quality pre- and post-bronchodilator spirometry from 28 828 participants.
The follow-up study was conducted between 2019 and 2021, in 18 sites across Africa, Asia, Europe and the Caribbean. At baseline, there were in these sites 12 502 participants with high-quality spirometry. A total of 6452 were followed up, with 5936 completing the study core questionnaire. Of these, 4044 also provided high-quality pre- and post-bronchodilator spirometry.
On both occasions, the core questionnaire covered information on respiratory symptoms, doctor diagnoses, health care use, medication use and ealth status, as well as potential risk factors. Information on occupation, environmental exposures and diet was also collected
Microfiltration tangentielle de suspensions particulaires - modelisation
SIGLEINIST T 76979 / INIST-CNRS - Institut de l'Information Scientifique et TechniqueFRFranc
First evidence for Cambrian rift-related magmatism in the West African Craton margin: The Derraman Peralkaline Felsic Complex
Association of Obesity and Socioeconomic Status among Women of Childbearing Age Living in Urban Area of Morocco
Worldwide, obesity is considered as an important public health problem. This study aims to explore the social and economic factors associated with overweight and obesity among women of childbearing age residing in the urban area of Morocco. This is a descriptive and analytical study conducted among women (N=240), aged between 15 and 49 years. At recruitment, socioeconomic status (SES) of each participant was assessed, anthropometric parameters were recorded, and body mass index (BMI), waist circumference, and waist-to-hip ratio (WHR) were measured to assess overweight and obesity. Data regarding skipped meals (breakfast, lunch, and dinner) were collected using an adapted questionnaire. The prevalence of overweight and obesity among women of childbearing age was 29.9% and 15.4%, respectively, while for abdominal obesity, the prevalence of overweight and obesity was, respectively, 39.9% and 60.1%. The results indicate that the prevalence of overweight and obesity among women is higher in women aged over 30. A significant association was shown between education level and both BMI and WHR (r1=−0.23, r2=−0.17, p<0.05), respectively, and there is also a significant correlation between household size and WHR abdominal obesity (r=0.21, p=0.05). Our results reinforce the necessity to improve the access of all social classes in Morocco to reliable information on the determinants and consequences of obesity and to develop plans for adequate prevention and management of obesity
Association of Obesity and Socioeconomic Status among Women of Childbearing Age Living in Urban Area of Morocco
Energy and Macronutrients Intakes among Childbearing Age Women Living in the Urban Area of Morocco: A Cross-Sectional Study
Over the last few decades, there have been significant dietary and lifestyle changes worldwide. In Morocco, these changes have led to serious nutritional disorders and increased risk of morbidity and mortality particularly among vulnerable groups such as women of childbearing age. We aimed to assess the average daily energy and macronutrient intakes and to investigate their association with socioeconomic factors and weight status among women aged 19–49 years in urban areas. A total of 542 women attending public health centers were recruited. Socioeconomic and demographic data were collected using a questionnaire. Anthropometric measurements were taken using standardized equipment. Food consumption data were obtained through the 24-hour dietary recall method, and the macronutrient composition of foods was estimated based on the Moroccan food composition table and the Nutrilog software. The average daily energy intake among the study population was 1591 kcal, composed of 56% from carbohydrates, 28% from fats, and 16% from protein. Reported energy intake by the majority of women (81.5%) was lower than recommended daily allowances for energy. There was a significant positive correlation between educational level and energy (p=0.001), carbohydrates (p=0.001), proteins (p=0.004), and fats intakes (p=0.032), respectively. A significant negative association of household size with protein intakes was also observed (p=0.034). Carbohydrates, proteins, and fats intakes tended to decrease; however, these associations were not statistically significant. Further studies and appropriate interventions are needed to address the trends in energy and macronutrients intakes in the development of policy initiatives aimed at nutrition education and chronic disease prevention among childbearing age women
New ophiolite slivers in the External Rif belt, and tentative restoration of a dual Tethyan suture in the western Maghrebides
International audienceOphiolite slivers have been described recently in the core of the External zones of the Central Rif belt. The present work aims at illustrating new ophiolite slivers further east and discussing the structural position and tectonic emplacement of all these oceanic floor remnants. Their basement consists of gabbros previously dated at 166±3 Ma and their cover includes mafic breccias, micrites and radiolarites. These oceanic slivers are located within the Mesorif nappe stack at the bottom of the Senhadja nappe that roots beneath the Intrarif Ketama unit and was thrust over the more external Mesorif and Prerif units during the Cenozoic inversion of the North African paleomargin. These oceanic crust (OC) slivers belong to the same Mesorif suture zone as the Beni Malek serpentinites and Ait Amrâne metabasites from eastern Rif that also include marbles with ophiolitic clasts and derive from an ocean-continent transition (OCT) domain. After examination of the varied hypotheses that have been suggested to account for the emplacement of these units in the External Rif, we propose that obduction sampled an oceanic corridor opened between the Mesorif and Intrarif domains at the emplacement of the Rif Triassic evaporite basin. The Intrarif block should have been then separated from the African passive margin and connected with the Flysch domain south of the passive margin of the Alboran domain. The pre-collision structure of the Rif transect would involve two hyper-extended passive margins separated by a narrow oceanic transform fault corridor. Therefore the Tethys suture in the western Maghrebides would be split by the Intrarif block and would involve the Flysch zone in the north and the ophiolite bearing Mesorif suture zone in the south
Kalsilite-bearing plutonic rocks: The deep-seated Archean Awsard massif of the Reguibat Rise, South Morocco, West African Craton
Kalsilite-bearing igneous rocks are extremely rare,most known examples are volcanic. The few previously recorded
kalsilite-bearing plutonic rocks are all Phanerozoic and mostly limited to the small ultrapotassic massifs of the
Baikal–Stanovoi Rift in the Siberian Craton, the Greenland Batbjerg Massif, and the Kola Peninsula Khibiny Complex.
We have found that the Archean to Proterozoic transition in thewestern Reguibat Rise of theWest African Craton is
marked by several small massifs predominantly composed of kalsilite syenites, i.e., synnyrites. The largest massif is
Awsard, a deep-seated intrusive body mainly composed of 2.46 Ga synnyrites and K-rich nepheline syenites with
mantle-like Sr and Nd (whole-rock) and O (zircon) isotope composition. Apart from some superficial resemblance
to the Baikal–Stanovoi synnyritiferous complexes, Awsard has no known equivalent in the geological record. It is the
oldest, the deepest and the largest known occurrence of synnyrites. Awsard comprises solely felsic syenites with
εNd(t) notably more primitive than their Siberian counterparts. The synnyrites contain kalsilite and rare nepheline
as primary phases with no leucite or leucite pseudomorphs. Kalsilite and nepheline form large discrete grains
that, in places, are accompanied by spectacular Ks–Or or Ne–Or symplectites. The symplectites are magmatic, generated
by simultaneous crystallization of the two phases and the imbalance between the growth rate of the feldspar
and the diffusivity of silica and alkalis in the melt. To explain why Awsard lacks mafic rocks and associated
carbonatites, typical of other synnyrite massifs, we propose that ascending water-poor (H2O b 0.65 wt.%) mafic
ultrapotassic magmas solidified at a pressure of 10–16 kbar underneath the already stabilized Archean crust of
the region. In these conditions leucite began to crystallize when the temperature dropped to around 1100 °C. As a
result of their low density, leucite crystals floated and formed a cap at the top of the intrusion. Then, the chamber
was replenished with awater-rich andmore sodic ultrapotassicmagma that originated in the samemetasomatized
mantle-source region. After prolonged fractional crystallization this second magma released an aqueous vapor
phase that migrated upwards and melted the leucite cap thus producing a low-density hydrous magma of
leucite-like, synnyritic, composition. This leucite-like magma, and the late residual melts from the second pulse
that replenished the chamber, ascended and intruded the already cratonized lower crust of the western Reguibat
Rise. There, the magmas crystallized outside the leucite stability field to produce the synnyrites and the nepheline
syenites, respectively. There is no evidence that the metasomatic refertilization of the mantle required to produce
the initial ultrapotassic mafic magmas was related to subduction fluids. On the contrary, it seems to have been
caused by incompatible-element enriched hydrous fluids released from delaminated lower crustal fragments
Liassic age of an oceanic gabbro of the External Rif (Morocco): Implications for the Jurassic continent–ocean boundary of Northwest Africa
Sélection et priorisation des substances à surveiller dans les eaux souterraines au titre de la DCE
International audienc