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Search Results: 1 - 10 of 449 matches for " Dwayne Daniels "
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Antimicrobial Activities of Leaf Extracts of Guava (Psidium guajava L.) on Two Gram-Negative and Gram-Positive Bacteria
Bipul Biswas,Kimberly Rogers,Fredrick McLaughlin,Dwayne Daniels,Anand Yadav
International Journal of Microbiology , 2013, DOI: 10.1155/2013/746165
Abstract: Aim. To determine the antimicrobial potential of guava (Psidium guajava) leaf extracts against two gram-negative bacteria (Escherichia coli and Salmonella enteritidis) and two gram-positive bacteria (Staphylococcus aureus and Bacillus cereus) which are some of foodborne and spoilage bacteria. The guava leaves were extracted in four different solvents of increasing polarities (hexane, methanol, ethanol, and water). The efficacy of these extracts was tested against those bacteria through a well-diffusion method employing 50?μL leaf-extract solution per well. According to the findings of the antibacterial assay, the methanol and ethanol extracts of the guava leaves showed inhibitory activity against gram-positive bacteria, whereas the gram-negative bacteria were resistant to all the solvent extracts. The methanol extract had an antibacterial activity with mean zones of inhibition of 8.27 and 12.3?mm, and the ethanol extract had a mean zone of inhibition of 6.11 and 11.0?mm against B. cereus and S. aureus, respectively. On the basis of the present finding, guava leaf-extract might be a good candidate in the search for a natural antimicrobial agent. This study provides scientific understanding to further determine the antimicrobial values and investigate other pharmacological properties. 1. Introduction Recently there has been a lot of attention focused on producing medicines and products that are natural. Several fruits and fruit extracts, as well as arrowroot tea extract [1] and caffeine [2], have been found to exhibit antimicrobial activity against E. coli O157:H7. This suggests that plants which manifest relatively high levels of antimicrobial action may be sources of compounds that can be used to inhibit the growth of foodborne pathogens. Bacterial cells could be killed by the rupture of cell walls and membranes and by the irregular disruption of the intracellular matrix when treated with plant extracts [1]. The guava (Psidium guajava) is a phytotherapic plant used in folk medicine that is believed to have active components that help to treat and manage various diseases. The many parts of the plant have been used in traditional medicine to manage conditions like malaria, gastroenteritis, vomiting, diarrhea, dysentery, wounds, ulcers, toothache, coughs, sore throat, inflamed gums, and a number of other conditions [3–5]. This plant has also been used for the controlling of life-changing conditions such as diabetes, hypertension, and obesity [3, 6–10]. In this study, we aim to evaluate the total extracts of P. guajava leaves, growing at Fort Valley State
Creating a Single South African Keyboard Layout to Promote Language
Dwayne Bailey
Lexikos , 2011, DOI: 10.5788/17--519
Abstract: : In this case study, a description is given of a keyboard layout designed to address the input needs of South African languages, specifically Venda, a language which would otherwise be impossible to type on a computer. In creating this keyboard, the designer, Translate.org.za, uses a practical intervention that transforms technology from a means harming a language into one ensuring the creation and preservation of good language resources for minority languages. The study first looks at the implications and consequences of this missing keyboard, and then follows the process from conception, strategy, research and design to the final user response. Not only are problems such as researching the orthographies, key placement and keyboard input options examined, but strategic objectives such as ensuring its wide adoption and creating a multilingual keyboard for all South African languages are also discussed. The result is a keyboard that furthers multilingualism and ensures the capturing of good data for future research. Finally it is a tool helping to boost and bolster the vitality of a language. Keywords: KEYBOARD, MULTILINGUALISM, VENDA, AFRIKAANS, TSWANA, NORTH-ERN SOTHO, ZULU, SOURCE, FREE SOFTWARE, LAYOUT Opsomming: Die skep van 'n enkelvoudige Suid-Afrikaanse toetsborduit-leg om taal te bevorder. In hierdie gevallestudie word 'n beskrywing gegee van die ontwerp van 'n sleutelborduitleg vir die hantering van die insetbehoeftes van Suid-Afrikaanse tale, veral Venda, 'n taal wat andersins onmoontlik op 'n rekenaar getik sou kon word. Deur die skep van hierdie sleutelbord gebruik die ontwerper, Translate.org.za, 'n praktiese ingryp wat tegnologie verander van 'n middel wat 'n taal benadeel tot een wat die skep en bewaring van nuttige taal-hulpbronne vir minderheidstale verseker. Die studie kyk eers na die implikasies en gevolge van hierdie ontbrekende sleutelbord, en volg dan die proses van konsepsie, strategie, navorsing en ontwerp tot die uiteindelike gebruikersreaksie. Nie alleen word probleme soos die navors van die ortografie , sleutelplasing en sleutelbordinsetkeuses ondersoek nie, maar ook strategiese doelwitte soos die versekering van 'n wye aanvaarding daarvan en die skep van 'n meertalige sleutelbord vir alle Suid-Afrikaanse tale word bespreek. Die resultaat is 'n sleutelbord wat meertaligheid bevorder en die vaslegging van nuttige gegewens vir toekomstige navorsing verseker. Uiteindelik is dit 'n werktuig wat help om die lewenskragtigheid van 'n taal te versterk en te steun. Sleutelwoorde: TOETSBORD, VEELTALIGHEID, VENDA, AFRIKAANS, TSW
'from the Throne': What the Stranger in 'the War-Prayer' Says About Mark Twain's Theology
Dwayne Eutsey
Journal of Transnational American Studies , 2009,
Abstract:
Why Use Music in English Language Learning? A Survey of the Literature
Dwayne Engh
English Language Teaching , 2013, DOI: 10.5539/elt.v6n2p113
Abstract: The use of music and song in the English language-learning classroom is not new. While many teachers intuitively feel that music is beneficial in teaching English language, there is sometimes a lack of the theoretical underpinnings that support such a choice. There are examples in the literature to argue the strong relationship between music and language that are substantiated by research in the fields of cognitive science, anthropology, sociolinguistics, psycholinguistics, First Language Acquisition (FLA) and Second Language Acquisition (SLA).
Genetic and health issues emerging from sperm donation—The experiences and views of donors  [PDF]
Ken Daniels, Wendy Kramer
Advances in Reproductive Sciences (ARSci) , 2013, DOI: 10.4236/arsci.2013.13003
Abstract: 164 previous sperm donors completed an online survey regarding health and genetic experiences and views. Results highlight that donors desire to act responsibly with recruiting facilities is not always possible. Objective: Obtaining the views and experiences of sperm donors regarding health and genetic matters. Design: Online survey. Setting: Not applicable. Participants: 164 previous sperm donors. Interventions: Not applicable. Main outcome measures: Views and experiences on health and genetic issues. Results: A variety of approaches are adopted by recruiting facilities in regard to selection and post-donation factors. The vast majority of donors said they had not been contacted by the facility they donated at to update their medical information, while almost one quarter of donors indicated that a health or genetic risk factor had occurred. A great majority of donors felt that they had not received any education or counselling on the potential curiosities of donor conceived people. Donors sought to be honest and open with staff but often found there were difficulties in doing so. Conclusions: Overall, donors indicate that they see donating as involving responsibilities to the offspring and families. The study highlights however that their ability to act responsibly is limited by some of the interactions or lack of them with the facilities where they donated. Implications for recruiting facilities need to be considered.
Inflated Production Quota Gains Paid for by a Consumption Tax  [PDF]
Troy G. Schmitz, Andrew Schmitz, Dwayne Haynes
Theoretical Economics Letters (TEL) , 2012, DOI: 10.4236/tel.2012.21012
Abstract: We consider a production quota buyout that is paid for by a consumption tax. If producers are paid the true value of the quota via a consumption tax, the net producer gain is zero for the combined introduction and removal of quota (even though the quota value is positive) since the net gain to producers when the quota was introduced is equal to the net loss to producers when the production quota is removed. Therefore, the quota value does not measure the producer net gain from both the introduction and removal of the production quota. The quota value merely represents the consumption tax amount. This is also true if producers are paid (which is often the case) an inflated quota value that is more than the true quota value.
An Overview of Mobile Malware and Solutions  [PDF]
Fan Wu, Hira Narang, Dwayne Clarke
Journal of Computer and Communications (JCC) , 2014, DOI: 10.4236/jcc.2014.212002
Abstract:

Mobile Security has been a rapidly growing field in the security area. With the increases of mobile devices and mobile applications, the need for mobile security has increased dramatically over the past several years. Many research and development projects on mobile security are ongoing in government, industry and academia. In this paper, we present an analysis of current mobile security problems and propose the possible solutions to malware threats. Our experiments show antimalware can protect mobile device from different types of mobile malware threats effectively.

Polémicos privilegios: dos versiones de la primera sátira conocida en contra de los conversos
Carpenter, Dwayne E.
Sefarad : Revista de Estudios Hebraicos y Sefardíes , 2012,
Abstract: The anti-Converso literature of the 15th century is noteworthy for its variety of genres –prose treatises, sermons, satirical poetry, allegories, etc.–, but what unites all of these works is their intent to mock individuals or vilify conversos as a whole. While most of these works convey their hostility in crude, stereotypical fashion, a few are distinguished by their clever form, a rhetorical cloak designed to conceal the morally repugnant sentiments contained in these texts. Among the latter is a curious, unedited document entitled Privilege that King Juan II granted to a man named Hernando, one of his favored, to become a marrano, even though he was not one by birth. The 18th-century manuscript –“copied by hand from an old book”– is housed in the Royal Library of Madrid, and satirizes not only conversos but also patents of nobility. It is here edited for the first time. A work belonging to the same tradition, Transcript of a letter of privilege that King Juan II granted to a hidalgo, is found in two manuscripts in the National Library of Madrid. The editorial misfortunes it has suffered over more than a century warrant its publication here in a reliable edition. La literatura anticonversa del siglo XV se destaca por su diversidad genérica –tratados en prosa, sermones, sátiras poéticas, alegorías, etc.–, pero todas estas obras coinciden en su finalidad de ridiculizar individuos o envilecer la colectividad conversa. Mientras que la mayor parte de estos escritos expresan su animadversión de forma tosca y estereotipada, algunos se distinguen por su forma ingeniosa de diatriba, cobijo retórico que pretende disfrazar los sentimientos moralmente repugnantes que abarcan. Entre ellos se encuentra un curioso documento inédito llamado Privilegio del rey don Juan Segundo concedido a un hombre llamado Hernando, privado suyo, para ser marrano, aunque no lo era por nacimiento, texto manuscrito del siglo XVIII – Copióse de un libro antiguo de mano – que custodia la Real Biblioteca de Madrid y que se caracteriza por su doble sátira de los conversos y de las patentes nobiliarias. Aquí se edita por primera vez. Pertenece a esta misma tradición el Traslado de una carta de privilegio que el rey don Juan Segundo dio a un hijodalgo, texto que se encuentra en dos manuscritos de la Biblioteca Nacional de Madrid. Sus infortunios editoriales durante más de una centuria justifican aquí una edición fidedigna.
Topological Symmetry Groups for Small Complete Graphs
Dwayne Chambers,Erica Flapan
Mathematics , 2012,
Abstract: For each $n\leq 6$, we characterize all the groups which can occur as either the orientation preserving topological symmetry group or the topological symmetry group of some embedding of $K_n$ in $S^3$.
Avalia??o de genótipos de batata para resistência ao vírus Y
Daniels, Julio;
Horticultura Brasileira , 2000, DOI: 10.1590/S0102-05362000000200015
Abstract: potato virus y (pvy) is considered one of the main causes of potato degeneration in brazil. to determine the field resistance of potato genotypes to pvy, in rio grande do sul, brazil, fifteen clones and cultivars were tested during two consecutive spring planting seasons. pvy detection was done by serological tests (das-elisa). cultivars and lines performed as follows: cristal and 2cri-1149-1-79, resistant; astrid, baraka, baronesa, catucha, macaca, monte bonito, santo amor, trapeira and 2ac-917-7-80, intermediate resistance; bintje, cerrito alegre and monalisa, susceptible; and achat, extremely susceptible.
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