The present study was conducted to evaluate the bioaccumulation of metallic elements in forages (case Bersim) irrigated by water of Sebou and Beht River. Seven metallic elements (Cd, Co, Cr, Cu, Ni, Pb and Zn) were analyzed by Inductively Coupled Plasma (ICP). The results showed that the levels of Cd in irrigation water exceeded levels established by Moroccan standards, the concentrations of Cd and Cr in soil (0-15 cm) beyond the limits recommended by the AFNOR and contents of Cd, Cu and Ni in the edible portion of Bersim are higher than those fixed by the FAO / WHO (2001) and WHO / EU (1983). The transfer factors of Zn and Cu is high compared to other metallic elements (Co, Cd, Ni, Pb and Cr). Indeed, the high absorption of trace-elements by the Bersim tissue may be associated with the chemical form of the metal in the soil matrix, the physicochemical characteristics of the soil and to the nature of the plant species. Bioaccumulation of metallic elements identified in green fodder is caused by the use of the surfaces waters of Sebou and Beht as a source of irrigation.
Traditional medicine remains the principal remedy for a vast majority of people to solve their health problems, not only because it is an important part of cultural heritage, but also for reasons of limited financial means. It was passed from one generation to another through oral communication, taking the risk of significant loss of awareness. The ethnobotanical survey is essential for the identification of medicinal plants and their uses. The objective of our study was to identify the different traditional therapeutic uses of medicinal plants commercialized, and to document this traditional knowledge related to the use of these plants in the province La
The occurrence of toxic freshwater blooms of cyanobacteria has been frequently reported during the last 15 years in Lalla Takerkoust lake (35 km southwestern of Marrakech city) In this study, it has been confirmed that the collected cyanobacteria bloom could produce different variants of microcystins at high concentration of 11.5 mg equiv. MC-LR g-1DW of the cyanobacteria cells. In order to study the effect of microcystins on faba bean seedling cultured in vitro, the crude aqueous extract of the toxic bloom was prepared and sterilized by filtration, and then it was supplemented to BNM medium at different concentrations. After 10 days of in vitro seedlings growing in BNM medium, plants fresh and dry weights were determined, plants shoot and root length was measured and then the roots were subjected to histological microscope observation of root hair, root tip and root cortical cells. The results revealed that microcystins exposure induced a decreasing of seedling growth and biomass accumulation in a concentration dependent manner. In addition, seedling young roots exhibited a brownish aspect, necrosis and tissue lysis. At a microcystin's concentration of 40
The effects of zeta potential on drinking water tanks were studied to find a suitable and cheap method to conserve the water specification biologically by preventing the growth of biofilm inside the inner surfaces of the tanks without any additives. Three plastic tanks were used (1 m3 each); the first one is feed tank, the second is control tank and the third is connected with zeta rod (ZRS-R) that gives constant voltage (30
A review on Erbium doped fiber amplifier (EDFA) system capable of amplifying incoming signal light between 1525-1610 nm. Understand its basic configuration, materials and their effects in transmission channel. Also learn how to handle amplification of high speed incoming light signals entire C+L band wavelengths in single mode fibers as well as multimode fiber. There are two major issues incorporated to EDFA for example to achieve high gain (? 40 dB) & lower noise figure (? 6 dB) at various parameters like input power and ASE to transmit signals longer distances.
Cowpea (Vigna unguiculata L.Walp.) is a basic food product which is cultivated in the savannas of west Africa. Its cultivation is confronted to biotic and abiotic constraints. The abiotic constraints are primarily of climatic types (recorded rainfall, temperature). The bad spatio-temporal distribution of recorded rainfall as well as the high temperatures accentuate the drought which blocks the production of cowpea. The aim of the study is to identify the varieties of cowpea that is adapted to the cultivation of dry season, (ii) to determine the suitable hydrous mode and its (their) period(s) in the year favorable to the cultivation of dry season of cowpea. Thus, two varieties of cowpea- KN1 and KVX 61.1 -were cultivated in pots of six (06) liters in real medium, during the hot period of the year. The trials were separated by a fifteen (15) days interval. Each variety was subjected to three hydrous modes from the 14th days after sowing. The environmental, morphological and agronomic parameters were noted during the study. The results revealed that the temperature gradually turned down and the relative humidity and the productivity of KVX 61.1 have gradually increased until the end of the study. . Variety KN1 was illustrated by the absence of flowering. The report biomass root on air biomass evolved according to the temperature. This study reveals that KVX 61.1 sown and sprint led starting from March 26th every two makes it possible to obtain a rather good production of pods.
The objective of this article is to identify the nature of the relationship between the financial sphere and the productive sphere. First, disclosing the various theoretical and empirical studies on the so-called relationship, then highlighting the nature of the relationship between the two spheres for AMU countries with the exception of Algeria and Libya. We will therefore answer the question: how the financial sector affects -t- it on the real economy by taking as a case study Tunisia, Morocco and Mauritania.
The role media plays to formulate, influence and consequently mould the public perception about various issues is unprecedented. There are serious implications for both the media and the youth in a society increasingly influenced and managed through the news channels. The profound impact of news channels on Pakistani society has been an interesting subject of research in the recent past. However, the impact of new found freedom of expression in the face of censorship and other means of control on media qualifies further in-depth research. The present study focuses on the impact of media, particularly news channels on the youth in Lahore, Pakistan. Two groups were separately studied: One who watched news channels daily and the other who watched headlines of news channels on weekends only. The convenient sampling method was adopted. The samples included cohorts of both the genders aging 20-25 years. Semi-structured interviews were conducted to investigate their experiences of being affected by watching news channels on daily basis, and headlines on weekends, separately. Moreover, what factors they considered affective on their perception. Interpretative Phenomenological Analysis (IPA) was applied as a research method. Five categories emerged from first group after coding the data, namely: Perception of News Channels, Perception of Political Systems, Stressful Experiences, Effects of News Channels on One's Life, and Effects of News Channels on Society as a whole. Four categories emerged from second group, namely: Intentional Avoidance of News Channels, Perception of News Channels, Perception of Political Systems and Effects of News Channels on Society. The results clearly suggested that those who were more exposed to the news channels got more influenced consequently.
The objective of this article is to analyze the management system integration advantages (quality, safety, environment, ...) in Moroccan companies doubling or tripling certified (ISO 9001, ISO 14001, OHSAS 18001, ...). The study was conducted through an empirical survey of 50 Moroccan companies; overall management of the system, a synergy between the different management areas, a stakeholder satisfaction, efficiency or even organizational efficiency, cost optimization and competitive advantage are all benefits from the integration of management systems in the Moroccan companies. The counting of the questionnaire was administered with the Principal Component Analysis method (PCA). The investigation to uncover the benefits of integration management systems for the Moroccan companies, it has responded to the issues raised by this publication.
The objective of this paper is to analyze the levels of integration management systems (Quality, safety, environment, ...). The study was conducted through an empirical survey administered online from 50 doubling or tripling Moroccan companies certified ISO 9001, ISO 14001, OHSAS 18001, etc. Levels of integration were first studied in relation to the order of implementation management systems and depending on the number of certificates held by each company. The results show that the level of integration of management systems is higher when the company adopts an integrated management system directly from the first move by against those implemented management systems sequentially months have high levels of integration. Companies that are doubly certified have higher levels of integration than those certified triple. The investigation to uncover the levels of integration of management systems with the Moroccan companies, it has responded to the issues raised by this publication.
The objective of this work is the study of the physico-chemical and microbiological quality of a derivative of Moroccan dates: Dkess (date paste). This is the basis for Food Saharan regions. Despite the sensitivity of Dkess to alteration and that poses serious problems to human health found that few studies conducted on this product. The study was performed on 300 samples, physico-chemical characteristics (4 criteria), microbiological and hygienic (10 criteria) were assessed against the standards. A Characterization of microbial flora and a study of the antibiotic susceptibility of some isolated bacteria were performed. The results showed that the quality of pulp is much more developed than that of traditional pulp and semi industrialized and this on all the criteria examined whether physicochemical or microbiological (42% of the samples of traditional pulp and 33% of dough semi industrialized does not conform to international standards). In addition, the poor preservation of places of production causes an alteration of traditional pasta and pasta semi industrialized dates and their susceptibility to contamination by microorganisms, and the damage is even more important as storage conditions and storage are not adequate. The control of manufacturing processes and preparation as well as the entire food chain of these products must be improved to ensure the health and safety of consumers.
The study aims to deepen the knowledge on the integrated management of water resources in the basin of the Niger River in Benin. It was conducted using descriptive methods, hydrological and piezometric statistics.. The results show that climate plan period 1951-2005 was marked by a rain drop out of post- 17% higher average temperatures of 1.8
This study aims to assess the impact of climate change on water resources in the high Oum Er Rbia basin. To achieve this goal; four stations were studied: Dchar el Oued, Taghzout, Taghat and Tamchachte. The difference in the annual mean and annual variations in hydroclimatic factor show that during the period of 1974-2001, the area has very dry and wet years, with excessive periods (1976/1977, 1978/1979 and 1995/1996) and with passive periods (1983/1984, 1992/1993 and 1994/1995). The period of 1974-2001 was characterized by a percentage of 40.7% of wet years and a percentage of 59.3% of dry years. The annual rates of upper Oum Er Rbia basin during the period of 1974-2001 for the Dchar El Oued station indicate a height of average annual water 202.2 mm, while the average annual rainfall in the basin, for the same period of observation is 536.0 mm. It can be inferred that the loss of water: infiltrated, evaporated maintained in the soil or used for irrigation is 333.8 mm or 62.27% of the precipitation. Finally, the general tendency of the high Oum Er Rbia basin is toward drought whose frequency has increased in recent decades to 32.6%.
A study was carried out to determine the optimum effect of infusion temperature, time, and water volume on chemical composition of Khaya tea. Four grammes of Khaya tea was infused in incubators at different temperatures, for different times, and water volume. And treatments for infusion water volume consisted of control 100, 150 and 200 ml at different incubator temperature (45, 70, 95
Newer fatigue prediction models for estimating the multiaxial fatigue limit often lack a simple analytical solution and the complexity of multiaxial solutions during programming makes testing an unattractive task. This paper summarizes an attempt to propose a novel equivalent stress approach suitable for estimating fatigue damage in the presence of complex multiaxial fatigue loadings. According to the devised method, fatigue limit under multiaxial loading is evaluated by proposing an equivalent loading with zero out-of-phase angles. The accuracy of the proposed approach was systematically checked by means of 87 experimental data taken from the literature and generated by testing different metallic materials under both in-phase and out-of-phase biaxial fatigue loading. Results show that the equivalent stress approach is an elaboration of non-conservative stress invariant based multiaxial fatigue criteria like the well-known Sines method. This exercise allowed us to prove that the systematic application of the equivalent stress resulted in highly accurate predictions and it held true independently of the cause of the mobility of principal stress directions of the stress field damaging the fatigue process zone. Simulations also emphasize a general quite better precision of the proposed equivalent stress approach when compared to another method, namely the minimum circumscribed ellipse approach.
This research study is an investigation of the successful small business entrepreneurs who are engaged in family owned business in England. The selected case study of seven days retail store at Luton UK who started the small family business during 2002 with very small investment and now its one of successful family businesses of Asian community in England. The seven days store offers a range of services while catering to the needs of the local Asian Muslim community. The store offers a range of ethnic groceries, Asian food, meat, fruits, vegetables, PCO services, and other convenience items at very competitive prices to its local customers and gain a good business progress and growth within a short timeframe. The study is investigated and analyzed by the principal author during his process of writing his book on Asian SME Management in UK. The data was collected by arranging questionnaires, personal structure interviews, field observations and group discussions with the family business owners and customers and analysis is done by coauthors. This case study is a true success story of an effective entrepreneur in SME Management.
In a socio-political context characterized by a surge of violence in recent decades in the region of the Great Lakes (Burundi, Rwanda and Eastern DRC), solutions research have been undertaken at various levels: legal, political, diplomatic and military. But it is clear that the research did not get the desired effect. For this purpose, a focus on the contribution of civil society as a unifying element of peace and regional integration by adopting a functionalist approach seemed necessary. Civil society is not considered as a panacea for the promotion of peace, but as a means to which it would be appropriate to linger. Civil society is thus a factor contributing to the regional and peace integration. It is translated through the specificity of its action and the trust it enjoys with the populations. Furthermore, civil society plays an important role at the regional level in the reconstruction of the social fabric which expression can be seen through a comprehensive framework. However, it is clear that socio-political, ethnic and economic pressures contribute more to limit its action.
In this paper, the Adaptive Generalized Minimum Variance (AGMVC) is designed to control a Single Input Single Output (SISO) of central heating process by adjusting the flow of hot fluid through a valve driven by an electric voltage input. The model of the process has been obtained by an on- line algorithm identification using the Recursive Least-Squares estimation technique (RLS).
The conduct of the electrical networks has known in recent years major changes induced mainly by the technological development of power electronics as well as information systems and communication (Smart Grid), in addition to this is the integration of intermittent sources of production and competitive requirements advocating the power quality and the continuity of service as major objectives. That said it is understood that the electrical networks have a set of vulnerabilities due to the intrinsic parameters. The new concept of electrical networks regulation based on topological control can prevent major incidents following a saturation of transmission lines by providing a means of optimized regulation and means of safer and more effective communication.
Ancient Chinese thought that home physically reflects what individuals are experiencing in life, because that everything chosen to surround us will affect us emotionally. According to this argument ancient Chinese put the rules of the Feng Shui, which knows as an art and science of balancing the energy of a space through the arrangement of items. The goal is to maximize the flow of the Chi, or the energy around us. The history of Feng Shui in Chinese cultural heritage and its philosophical values and psychological effects reached through many of the studies carried out by Feng Shui teachers over hundreds of years, so the research find the necessity need of studying the Feng Shui and knowing its elements importance (symbols and colors) and its aesthetic values and psychological effects on the user and take advantage of them in the development of designs for printed upholstery fabrics and which is suitable to furnish the bedrooms , living rooms and dining rooms.
In this research, zeta potential technical has been used to limit the scales and biofilm inside cooling towers. To perform this experiment, two towers have been used; one with zeta potential device and the other is working normally as a control. A weekly test on samples at the outlet from the two towers has been conducted. As a result, the total count of bacteria was (4308.7 cfu/ml) on the control tower while the total count of bacteria on the zeta potential tower was (731.5 cfu /ml). The average algae growth has been decreased in zeta potential tower to (110.1 cfu/l) while it was about (153.48 cfu/l) in the control tower. The research focused also on some physical properties such as surface tension which is decreased under the influence of zeta potential, the electrical conductivity is increased in potential tower. Biofilm layer in control tower is found while it's not found in treated cooling with 25 high voltage zeta rod.
OBJECTIVES: The aim of this work is to study the relationship between praxis construction and visual memory presented successively by the score at copying and reproduction of memory with the body mass index in pre-school children of Kenitra city. METHODS: A 240 children aged 5-6 years apparently in the Kindergarten section of private schools in the city of Kenitra were evaluated. Weight and height were measured and body mass index (BMI) was calculated. Cognitive assessment was made by the Test of the figure of Rey B, which is to copy and reproduce from memory a simple geometric pattern. Statistical analyzes were performed using SPSS Version 20 software RESULTS Significant correlations (p <0.05) were recorded between these cognitive and anthropometric parameters of the different BMI groups. CONCLUSIONS: These results converge to show that the nutritional status presented by BMI correlates with perceptual activity and graphomotor and working memory in our context. Many tests appear necessary to better understand the children's performance.
The study was conducted to illuminate the food security status of livestock rearing small farmers in some selected areas of Gazipur district and to examine whether their food security are affected by livestock assets and in what extent. Data were collected from 50 farmers using purposive random sampling method during January-March, 2014. In order to collect data, a questionnaire was administered through face-to-face interviews. Data were analyzed by using descriptive statistics and logit model was used for statistical analysis. The results of descriptive statistics showed that only 4 percent of the sample small farmers crossed the secondary level of education, 14 percent of them were able to sign only and 8 percent of them were illiterate. Agriculture was identified as the main source of income among the sample small farmers and livestock rearing was identified as the subsidiary occupation of them. The descriptive study revealed that 58 percent of their total income came from crop cultivation and 37 percent came from livestock. The food security status of the sample farmers were checked by using recommended minimum calorie requirement (i.e. 2122 kcal). The results of the descriptive analysis revealed that, 50 percent of the sample farmers were food secured and the rest 50 percent were food insecure. The results of the logit model indicated that, out of six variables, four variables- annual income, education level of household head, number of small and large animals had significant positive influence on household's food security. Finally based on findings some policy measures were recommended.
The olive oil industry in Morocco produces an important amount of olive mill wastewater (OMWs) which poses serious environmental problems, anaerobic digestion is the most interesting technique of olive mill wastewaters treatment. In this study anaerobic digestion of OMWs was performed in a semi continuous mesophilic anaerobic digester for 30 days, during the experiment, the volume of biogas produced was measured by the water displacement method. The pH was around neutrality throughout the experiment and the maximum of biogas yield coefficient was 2277 ml / g VS.
21st century companies and institutions realized the need of embracing diversity and inclusion in their workforce and recruitment plans. This paper addresses the issues of diversity in the case of Silicon Valley Technology Companies in the United States. The key concepts around which this paper is build are an extensive definition of diversity, the history of equality in the US education system and statistics regarding the degree of minority persence in the Silicon Valley, with a focus on the technology companies. The paper also outlines the correlation between the level of minority presence and the female graduates of technical educational institutions in Silicon Valley.