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Search Results: 1 - 10 of 5314 matches for " Alessandra MS; "
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Mudas de melancia produzidas com substrato à base de pó de coco e solu??es nutritivas
Ramos, Anamaria RP;Dias, Rita de Cássia S;Arag?o, Carlos Alberto;Mendes, Alessandra MS;
Horticultura Brasileira , 2012, DOI: 10.1590/S0102-05362012000200026
Abstract: the choice of substrate is one of the most important stages for the seedlings production and must take into account the nutritional requirements of cultivated species. thus, the objective was to evaluate the substrate using coconut dust associated with nutrient solutions to produce seedlings of watermelon. the experiment was carried out at embrapa semi-arid in petrolina, pernambuco state, brazil, in a greenhouse in a completely randomized design with ten replications in a factorial arrangement 2 x 10 (cultivars of watermelon and substrates). the cultivars used were: opara and top gun. the coconut fiber was associated with nutrient solutions as follows: t1= control treatment composed of the commercial organic substrate plantmax? (sc), t2= coconut powder (pc), t3= coconut powder + melon solution (pc+sm), t4= coconut powder + solution of hoagland and arnon 12.5% (12.5% pc+hs), t5= coconut powder + solution of hoagland and arnon 25% (pc+hs 25%), t6= coconut powder + solution of hoagland and arnon 50% (pc+hs 50%), t7= coconut powder + solution of hoagland and arnon 75% (pc+hs 75%), t8= coconut powder + solution of hoagland and arnon 100% (100% pc+hs), t9= coconut powder + aminoagro mol (pc+am), t10= coconut powder aminoagro root (pc+ar). the solutions were applied eight times, 10 ml on each application, since the fourth day after sowing date (das), when the evaluation of seedlings emergence began. at 24 das we evaluated the fresh weight of shoots and roots, root length, number of roots in the upper third and contents of macro and micronutrients in the aboveground part. the cv. top gun presented higher levels of nutrients, except for iron and copper. the treatments t6, t7 and t8 presented levels of nutrients in plants similar to the commercial substrate plantmax. in general, the combinations of coconut dust associated with the nutrient solution of hoagland and arnon at 50, 75 and 100% and aminoagro root proved to be promising for the formation of watermelon seedlings on t
Review of MANETS Using Distributed Public-key Cryptography
Ms. Rajni,Ms. Reena
Computer Science , 2014,
Abstract: Ensuring security is something that is not easily done as many of the demands of network security conflict with the demands of mobile networks, majorly because of the nature of the mobile devices (e.g. low power consumption, low processing load). The study of secure distributed key agreement has great theoretical and practical significance. Securing Mobile Ad-hoc Networks using Distributed Public-key Cryptography in pairing with Mobile Ad hoc Networks and various protocols are essential for secure communications in open and distributed environment.
Dietary and nutrition screening for children seeking curative care in health facilities in Botswana
MS Nnyepi
African Journal of Food, Agriculture, Nutrition and Development , 2006,
Abstract: The extent to which nutrition and dietary screening performed in children seeking curative care in health facilities in Botswana was investigated using a cross-sectional survey design. Dietary screening, illness status, demographic and anthropometric data were obtained from a random sample of 522 children in 13 health facilities through structured interviews and actual anthropometric measurements. Amongst these, caregivers of children seeking curative care (n =174) completed a nutrition and dietary screening checklist designed to establish the proportion of ill children screened. Additionally, a self-administered questionnaire was used to examine the knowledge, attitudes, and perceptions of providers in the study clinics about nutrition and dietary screening and the types of indicators routinely used. Data were collected from all providers (n = 39) on duty. The results show that malnutrition was prevalent, with 13. 7%, 11.3 % and 3.9 % of children estimated to be stunted, underweight and wasted respectively. The prevalence of stunting and underweight was higher (p < .05) in older children (37–60 months), children perceived as sickly, or raised in households with periodic shortage of food compared to children under one year of age, children perceived as healthy or raised in households with adequate amounts of food at all times. Less than 20 % of children who sought curative care were screened for possible compromised dietary intake or nutritional status. Only 18 % of children had their weight measured during consultations. Only 10.8 % of providers were reported to have discussed the children’s growth indicators with care-givers. Similarly, few providers specifically discussed the feeding recommendations (10.8%) and feeding frequency (7.8 %) of children with care-givers. The providers’ knowledge about nutrition and dietary screening was low. Most providers (70 %) perceived their didactic training to be adequate and over half of them were satisfied with their skill level in assessing the dietary intake (53 %) and nutritional status (57.9 %) of children. Fewer providers were able to correctly list three indicators of nutritional status (35.9 %) or dietary intake (12.8 %). Study observations show that a large proportion of children seeking curative care in the health clinics are rarely screened for possible compromised dietary intake and nutrition status. Also, a large number of health providers are not satisfied with their skill level in dietary and nutrition screening. Since nutritional problems are often juxtaposed to health problems, efforts should be taken to integrate nutrition screening into the medical care for under-fives.
Nurturing the Fourth Generation: Defining the Historical Mission for Our Generation
MS Mwangola
Africa Development , 2008,
Abstract: Reflections on the African academy have identified different generations of African scholars. These interventions have sought to using different criteria, identifying different foci and arguing the importance of each. This paper furthers Thandika Mkandawire’s reflection on the first three generations of the post-colonial era (1995) by suggesting a historical mission for the next, the emerging fourth generation.
Gaborone is Growing like a Baby: Life Expectancies and Death Expectations in Urban Botswana
MS Ritsema
Africa Development , 2008,
Abstract: This article examines the paradox of Botswana’s twin reputations: first, successful national development and second, premature death from the HIV/AIDS epidemic. While locating these reputations in the capital city, Gaborone, the article analyzes reflections of people who are themselves the audience for, and participants in, the country’s development. Ethnographic data reveal a dramatic shift in discourse by generational cohort in terms of explaining the apparent contradiction of successful development in the midst of tragedy. The article shows how official discourses of development and death are appropriated by a younger generation in Gaborone, in ways unanticipated in a meta-narrative of modernity. The emotional anguish of an older generation is absent in a younger generation’s expectation that development goes hand-in-hand with funerals. The shift in perspective that is instantiated in Gaborone, reflects a profound transformation in the relationship between the production of knowledge and the state’s expanding capacity since independence in 1966. This study contributes to the literature on development, modernity, African cities and the HIV/AIDS epidemic.
Performing Our Stories, Performing Ourselves: In Search of Kenya’s Uhuru Generation
MS Mwangola
Africa Development , 2008,
‘Justice Be Our Shield and Defender’: An Intellectual Property Rights Regime for Africa
MS Mwangola
Africa Development , 2007,
Abstract: Protecting intellectual property rights has become essential in encouraging cutting-edge scholarship that advances the frontiers of knowledge. For a long time, the majority of Africa’s intelligentsia has worked in local and international environments that have exploited the continent’s intellectual capital. Even in contexts where intellectual property rights are enforced, certain constituencies remain at high risk for exploitation. In this paper I use three case studies to argue for a more comprehensive conversation on this issue encompassing intellectuals working in different contexts and with diverse agendas. The first of these involves the unequal power dynamics between individuals working in different kinds of institutions, in this particular case, complicated by the global North/ South divide. The second explores the dynamics of power in intellectual relationships while the third deals with the challenges emanating from the development and use of endogenous epistemologies in conversation and confrontation with modes of scholarship traditionally privileged in the western(ised) academy. How do we move towards a comprehensive intellectual property rights regime that does not inhibit intellectual freedom of exploration as it protects even the most vulnerable from exploitation? How do we foster a vibrant intellectual environment that is especially nurturing to communities traditionally marginalised within the academy?
Thermodynamique des systèmes micellaires Partie III : Capacités calorifiques apparente et partielle des alcanoates de sodium
MS Hajji
Afrique Science: Revue Internationale des Sciences et Technologie , 2007,
Abstract: Thermodynamics of micellar systems Part III : Apparent and partial heat capacities of sodium alkanoates To obtain the heat capacities of the aqueous solutions of the sodium carboxylates, we carry out microcalorimetric heat capacities measurements. The aim of this work is to calculate the quantities of the apparent and partial molar heat capacities, and also to define the critical micellar concentrations. The variations of the partial molar heat capacities by increment -CH2 allows us to give prove for products supposed to form true micelles and products do not form micelles. To discuss the solute-solvent and solutesolute interactions we used the standard apparent molar heat capacities.
A study on some efficient parameters in batch fermentation of ethanol using Saccharomyces cerevesiae SC1 extracted from fermented siahe sardasht pomace
MS Asli
African Journal of Biotechnology , 2010,
Abstract: Siahe sardasht grape is famous variety of grape in Iran that is used for red grape juice concentrate. The pomace of this grape (as byproduct of fruit juice concentrate industry) is a favorable medium for growth of all type of yeasts. The ethanol production using Saccharomyces cerevesiae SC1 extracted from fermented siahe sardasht grape pomace was studied in batch fermentation. The best ethanol production rates are observed at pH 4.5, temperature 32°C and sugar concentration equal to 100 g/L. According to the results, KH2PO4 is a better phosphorous source in comparison with K2HPO4, and (NH4)2SO4 is the best nitrogen source.
Functions and Dysfunctions of Mass Communication Media
MS Rabiu
Creative Artist: A Journal of Theatre and Media Studies , 2010,
Abstract: Mass communication provides a way of interacting, distantly, with unknown audiences. It is the process of sharing experience in which a huge number of people are involved simultaneously, or almost so. It often occurs through the use of mass media channels and technology. The mass media are all around us. To live even one day without mass communication would be impossible for most people. And yet many of us know little of how the media work and how they influence our lives – positively and negatively. Accordingly, this paper x-rays the six assigned duties or activities of mass communication and shows that they may be viewed from a functional-dysfunctional perspective.
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