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Search Results: 1 - 10 of 157173 matches for " Hudson B;Ribeiro "
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Resíduos de frutos de pequi no controle do nematóide das galhas em tomateiro
Ribeiro, Hudson B;Ribeiro, Regina Cássia F;Xavier, Adelica Aparecida;Campos, Vicente Paulo;Dias-Arieira, Cláudia Regina;Mizobutsi, Edson Hiydu;
Horticultura Brasileira , 2012, DOI: 10.1590/S0102-05362012000300016
Abstract: the exocarp and external mesocarp of pequi fruit are discarded during the extraction of internal mesocarp which is the commercial part used as food. the objective of this research was to study the use of aqueous extract and of pequi ground-powder to the control of root-knot nematode (meloidogyne javanica). from ground pequi fruit exocarp and external mesocarp were obtained the aquaeous extract and powder. five doses of aquaeous extract (0.0; 2.5; 5; 10 or 20%) were evaluated on root-knot nematode j2 (second stage juvenile) hatching and mortality. the assays were carried out in entirely randomized design with 10 replications. the hatching assay was set in petri plates with 800 nematode eggs and 10 ml of different doses of extract. during 14 days we counted the number of hatched juveniles under optical microscope. the mortality assay of root-knot nematode was evaluated putting 100 μl of each dose of extract plus 20 μl of supension containing 20 j2 in each cell elisa plate. after 24 h was counted the number of live and dead juveniles. the pequi powder was tested in tomato plants in greenhouse in four doses (0; 7.5; 15 or 30 g/4 kg of soil) in randomized blocks design with 10 replications per treatment. the pequi powder was incorporated to the soil seven days before transplanting and nematode eggs inoculation was carried out after transplanting. after 40 days we evaluated the number of galls, egg masses, eggs/root and j2 per 200 cm3 soil and the tomato shoot dry weight and height. the aquaeous extract reduced j2 hatching and increased j2 mortality. the increased application of powder doses reduced the number of galls, egg masses and eggs of root-knot nematodes per root system and the tomato shoot dry weight being a good indication of phytotoxicity.
Applications of the Phytomedicine Echinacea purpurea (Purple Coneflower) in Infectious Diseases
James B. Hudson
Journal of Biomedicine and Biotechnology , 2012, DOI: 10.1155/2012/769896
Abstract: Extracts of Echinacea purpurea (EP, purple coneflower) have been used traditionally in North America for the treatment of various types of infections and wounds, and they have become very popular herbal medicines globally. Recent studies have revealed that certain standardized preparations contain potent and selective antiviral and antimicrobial activities. In addition, they display multiple immune-modulatory activities, comprising stimulation of certain immune functions such as phagocytic activity of macrophages and suppression of the proinflammatory responses of epithelial cells to viruses and bacteria, which are manifested as alterations in secretion of various cytokines and chemokines. These immune modulations result from upregulation or downregulation of the relevant genes and their transcription factors. All these bioactivities can be demonstrated at noncytotoxic concentrations of extract and appear to be due to multiple components rather than the individual chemical compounds that characterize Echinacea extracts. Potential applications of the bioactive extracts may go beyond their traditional uses.
What Makes School Leaders Inspirational and How Does This Relate to Mentoring?  [PDF]
Peter Hudson
Open Journal of Leadership (OJL) , 2013, DOI: 10.4236/ojl.2013.24014
Abstract:

Leadership comes in many forms (such as transactional, transformational,anddistributed) and its effectiveness can inspire others to achieve organisational goals and visions.Inspiration as an emotional event requires receptiveness and an awareness of social interdependence. When mentees are inspired by mentor role models they can extend personal attributes and practices.Similar to other leaders, inspiring mentors can motivate mentees to develop a strength of character and achieve goals in the workplace.What makes school leaders inspirational and how does this relate to mentoring? This qualitative study collects data from 25 experienced teachers, which involved a written questionnaire, work samples, and audio-recorded focus group discussions. These participants indicated that inspirational school leaders were those who had: 1) organisational goals (e.g., visionary, goal driven, innovative, & motivational); 2) professional skills such as being knowledgeable, communicative, and acknowledging others’ achievements; and 3) personal attributes (e.g., integrity, active listening, respectful, enthusiastic, & approachable). This research shows how mentors and school leaders can consider the inspirational attributes and practices outlined by participants in this study to inspire teaching staff. For example, an awareness of attentive listening, motivational and visionary practices, and acknowledging individual achievements can guide school leaders and mentors to inspire others for achieving organsational goals and visions.

Coping Complexity Model: Coping Stressors, Coping Influencing Factors, and Coping Responses  [PDF]
Kathleen Hudson
Psychology (PSYCH) , 2016, DOI: 10.4236/psych.2016.73033
Abstract:

Aim: To describe the complex phenomena of coping involving the stressors, influencing factors, and responses of coping via a mid-range theory Background: Previous models have presented the concepts of coping, this model expands previous models, creates a revision which is more complex and more comprehensive than previous work. Design: Model includes components of initial stressors, key critical coping influencing factors, and various types of coping responses, either healthy or unhealthy responses. Results: Coping is complex and multifaceted. This model portrays a comprehensive overview of the facets of coping, including temporary, effective, and destructive coping responses. A list of key influencing factors is presented to assist with highlighting possible factors that can influence the overall potential adaptive (healthy) or maladaptive responses (unhealthy). This model outlines the various possible pathways of coping. Conclusion: This model provides a comprehensive complex coping overview which can be used for education, clinical, and research applications.

The impact of site factors and climate variability on the calculation of potential evaporation at Moel Cynnedd, Plynlimon
S. B. Crane,J. A. Hudson
Hydrology and Earth System Sciences (HESS) & Discussions (HESSD) , 1997,
Abstract: The meteorological record from the manual Moel Cynnedd climate station at Plynlimon in the Welsh Uplands has been supplemented with solar radiation data, initially from the Institute of Hydrology's Dolydd Office, and later from an adjacent automatic weather station, in order to calculate Penman potential evapotranspiration for the entire 27 year data set, 1969-1995. The methods of data capture are consistent with Meteorological Office criteria throughout the entire record, establishing an unbiased and probably unique indicator of climatic variability and change for this type of environment. Values of Penman Et calculated from these data provides an independent index of atmospheric demand for moisture as an adjunct to the hydrological studies being carried out in the Plynlimon and neighbouring catchments. Analysis of the long term data indicates considerable year-to year variability in the component variables, including some cyclical changes and possible long term trends in measured temperature. Annual variability in Et is less than in the component variables, and there is an indication of a possible long term cycle, but no evidence of an overall trend in Et during this particular study period. The results indicate that some of the observed variability can be explained by inevitable changes in exposure within this forest clearing site rather than changes in regional or global climatic patterns. A single meteorological station sited in a forest clearing at a relatively low altitude may underestimate potential evaporation across the catchment, as this will also include areas of exposed hillside and forest canopy.
In Vitro Anticancer Activity of Plant-Derived Cannabidiol on Prostate Cancer Cell Lines  [PDF]
Manju Sharma, James B. Hudson, Hans Adomat, Emma Guns, Michael E. Cox
Pharmacology & Pharmacy (PP) , 2014, DOI: 10.4236/pp.2014.58091
Abstract:

Cannabinoids, the active components of Cannabis sativa Linnaeus, have received renewed interest in recent years due to their diverse pharmacologic activities such as cell growth inhibition, anti-inflammatory effects and tumor regression, but their use in chemotherapy is limited by their psychotropic activity. To date, cannabinoids have been successfully used in the treatment of nausea and vomiting, two common side effects that accompany chemotherapy in cancer patients. Most non-THC plant cannabinoids e.g. cannabidiol and cannabigerol, seem to be devoid of psychotropic properties. However, the precise pathways through which these molecules produce an antitumor effect have not yet been fully characterized. We therefore investigated the antitumor and anti-inflammatory activities of cannabidiol (CBD) in human prostate cancer cell lines LNCaP, DU145, PC3, and assessed whether there is any advantage in using cannabis extracts enriched in cannabidiol and low in THC. Results obtained in a panel of prostate cancer cell lines clearly indicate that cannabidiol is a potent inhibitor of cancer cell growth, with significantly lower potency in non-cancer cells. The mRNA expression level of cannabinoid receptors CB1 and CB2, vascular endothelial growth factor (VEGF), PSA (prostate specific antigen) are significantly higher in human prostate cell lines. Treatment with Cannabis extract containing high CBD down regulates CB1, CB2, VEGF, PSA, pro-inflammatory cytokines/chemokine IL-6/IL-8. Our overall findings support the concept that cannabidiol, which lacks psychotropic activity, may possess anti-inflammatory property and down regulates both cannabinoid receptors, PSA, VEGF, IL-6 and IL-8. High CBD cannabis extracts are cytotoxic to androgen responsive LNCaP cells and may effectively inhibit spheroid formation in cancer stem cells. This activity may contribute to its anticancer and chemosensitizing effect against prostate cancer. Cannabidiol and other non-habit forming cannabinoids

Cold ion-atom chemistry driven by spontaneous radiative relaxation: a case study for the formation of the YbCa^{+} molecular ion
B. Zygelman,Zelimir Lucic,Eric R. Hudson
Physics , 2013, DOI: 10.1088/0953-4075/47/1/015301
Abstract: Using both quantum and semi-classical methods, we calculate the rates for radiative association and charge transfer in cold collisions of Yb+ with Ca.
Perceptions of teenagers about the role of the veterinarian in practice : a cross-cultural study : research communication
W.G.B. Hudson,B. Gummow
Journal of the South African Veterinary Association , 2012, DOI: 10.4102/jsava.v68i2.871
Abstract: A questionnaire survey of teenagers was conducted in 1995 to discover if the perceptions of the role of the veterinarian in practice differed among 3 cultural groups. Teenagers in their 1st year of secondary school education in 16 schools in the Krugersdorp area were used as the sample. Two thousand and sixty-five questionnaires were processed. A statistically significant difference in perceptions of the role of the veterinarian in practice was found between Black, Indian and White teenagers. Only 19.2 % of the Black teenagers and 51.6 % of the Indian teenagers had any idea of what a veterinarian did, compared to 88.1 % of White teenagers. Similar differences in pet ownership, disease recognition, and veterinary care between the cultural groups were also found. The study emphasised the tremendous need for increased exposure to the veterinary profession within the historically disadvantaged communities of South Africa.
Control of Germline Stem Cell Division Frequency – A Novel, Developmentally Regulated Role for Epidermal Growth Factor Signaling
Benjamin B. Parrott, Alicia Hudson, Regina Brady, Cordula Schulz
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0036460
Abstract: Exploring adult stem cell dynamics in normal and disease states is crucial to both better understanding their in vivo role and better realizing their therapeutic potential. Here we address the division frequency of Germline Stem Cells (GSCs) in testes of Drosophila melanogaster. We show that GSC division frequency is under genetic control of the highly conserved Epidermal Growth Factor (EGF) signaling pathway. When EGF signaling was attenuated, we detected a two-fold increase in the percentage of GSCs in mitotic division compared to GSCs in control animals. Ex vivo and in vivo experiments using a marker for cells in S-phase of the cell cycle showed that the GSCs in EGF mutant testes divide faster than GSCs in control testes. The increased mitotic activity of GSCs in EGF mutants was rescued by restoring EGF signaling in the GSCs, and reproduced in testes from animals with soma-depleted EGF-Receptor (EGFR). Interestingly, EGF attenuation specifically increased the GSC division frequency in adult testes, but not in larval testes. Furthermore, GSCs in testes with tumors resulting from the perturbation of other conserved signaling pathways divided at normal frequencies. We conclude that EGF signaling from the GSCs to the CySCs normally regulates GSC division frequency. The EGF signaling pathway is bifurcated and acts differently in adult compared to larval testes. In addition, regulation of GSC division frequency is a specific role for EGF signaling as it is not affected in all tumor models. These data advance our understanding concerning stem cell dynamics in normal tissues and in a tumor model.
Minimal Important Difference (MID) of two commonly used outcome measures for foot problems
Karl B Landorf, Joel A Radford, Susie Hudson
Journal of Foot and Ankle Research , 2010, DOI: 10.1186/1757-1146-3-7
Abstract: 184 participants with plantar heel pain were recruited from the general public to take part in two randomised trials (92 participants in each trial) that studied the effectiveness of two conservative interventions for plantar heel pain. Data from these participants were used to calculate the MIDs of the VAS and the FHSQ. An anchor-based method was used to calculate the MIDs. Two distinct types of pain were investigated for the VAS: average pain and first-step pain. All four domains of the FHSQ were investigated: foot pain, foot function, footwear and general foot health.The MID for the VAS using the anchor-based approach was -8 mm (95% CI: -12 to -4) for average pain and -19 mm (95% CI: -25 to -13) for first-step pain on the 100 mm VAS. The MID for the FHSQ was 13 points (95% CI: 6 to 19) for pain and 7 points (95% CI: 1 to 13) for function. The MID for the footwear domain of the FHSQ was -2 points (95% CI: -8 to 4) and 0 points (95% CI: -7 to 6) for the general foot health domain of the FHSQ.The results of this study provide additional evidence for MID values of the VAS and the FHSQ for plantar heel pain. This is important for clinicians and researchers as it provides a greater understanding of how much improvement is required by a patient before a minimal, worthwhile change is experienced. The calculated MIDs will also assist researchers with prospective sample size calculations.Health outcome assessment is an important component of health care. Outcome measures are primarily used to objectively detect change in a patient's health status in response to an intervention [1]. They may also be used to measure a patient's health status at a specific point in time [2].As outcome measurement has developed, there has been a growing appreciation of the patient's perspective of their disease and their preferences for treatment [3]. Outcome measures completed by the patient (i.e. self-reported) are now commonly referred to as patient-reported outcomes [4]. Patient-reported o
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