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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
231

Keeping Foods Cold for Picnics, Grilling, and Camping

Misner, Scottie, Whitmer, Evelyn 12 1900 (has links)
1p. / Keeping food safe to eat is as simple as keeping hot foods hot, cold foods cold, and all foods clean. This article outlines particular options for keeping coolers cold.
232

Genetically modified food and crops : perceptions of risks

Hall, Clare R. January 2010 (has links)
The debate around genetically modified food and crops has proved to be complex and far-reaching, involving diverse stakeholder groups and many issues. Although the extent of global uptake of GM crops has been substantial (23 countries and 114.65 million hectares by 2007), it is significant that four countries are responsible for 86% of all GM plantings, and that a number of key food markets (for example the EU and Japan) remain largely "GM-free‟. This suggests that there is reluctance on the part of many countries to embrace GM technology. There are likely many reasons for this, but one significant issue is that of the perception of the risks associated with the technology. There is a distinction between risk that exists in the world and that can be measured (objective risk) and risk that is perceived by an individual to exist and that is constructed by them based on their values and preferences. When technical measurement of actual risks is not possible, peoples‟ own perceptions of risks become important. This thesis aims to investigate the topic of risk perceptions associated with GM food and crops. Different stakeholder groups have been targeted, and a range of methodologies from a variety of disciplines have been employed to investigate what factors can be shown to influence risk perception. A range of factors were identified from existing literature, as having potential impact on risk perceptions. A number of these were investigated, some of which were found to have some influence on levels of risk perception. Results demonstrate that factors influencing peoples‟ perceptions of risk relating to GM food and crops, include the uncertainty associated with the technology, and trust in regulators, policy makers and others with control over the future development of the technology. Other factors found to be important to levels of risk perception held by different stakeholder groups, were a range of socio-demographic and cultural variables, the relationship between perceived risks and benefits, the equity of impacts, and the influence of third parties. There are a number of implications for the development of the GM debate arising from the findings. First, as there are socio-demographic and cultural factors linked to the perceptions of risk associated with GM technologies in food and agriculture, it is important to recognise that different people will react differently to the technology. Specifically, results from this thesis show that it may be that men, those who are more highly educated, those with a less ecocentric worldview, and those living in urban areas, are likely to respond more favourably to targeted promotional campaigns. As regards the farming community, results show that the first farming adopters are likely to be those who are both owners and tenants, not in an urban fringe location, potato growers, and not barley growers. Second, this thesis provides evidence that third parties are particularly important to farmers, thus it is crucial to recognise that there is potentially a long chain of action and reaction amongst many different stakeholders and actors impacting on farmers' levels of risk perception, and hence willingness to adopt the technology. Third, results from this research demonstrate that the linked issues of the relationship between risks and benefits, and the equity of (positive and negative) impacts, require that all stakeholders are content that they will receive a share of the benefits (if any) to be derived from the technology, and that neither they nor any other group of stakeholders are unduly impacted by the risks or negative impacts (if any) of the technology. Important here is the recognition that perceptions are as important as actual impacts. Fourth, the issue of trust has been shown by the results obtained by this research to be extremely important to peoples' perceptions of risk. It can be concluded that trust is of wider social and political importance that relates to the need to ensure greater democratisation of decision-making in order to re-establish trust in authorities. In the case of GM food this may require a rethinking of the EU legislation relating to the technology. This also relates to point below about the delivery of messages and education. Information sources must be trusted by those at whom the messages are aimed. More importantly though, if people are to trust decision making processes, there needs to be stakeholder involvement at an early stage of decision making, that allows some impact on decisions taken. In the case of the GM debate it may indeed be too late as decisions about the technology, its applications, the regulatory processes and its inclusion within the food chain are well established. Perhaps the best that can be hoped for is that lessons will be learnt and applied to future technology developments of relevance to the food chain, such as, nano-technology. Finally, this thesis has shown that uncertainty is central to peoples' perceptions of risk. This could be addressed through a combination of additional research into what is uncertain to people, the impacts and implications of the technology, more effective dissemination of existing knowledge, and impartially delivered messages and education strategies from trusted sources that address the concerns that people have about the technology. Importantly however there must be an acknowledgement that uncertainty is not restricted to "knowledge deficit‟ but encompasses the scientific uncertainties inherent within the technology, and is framed by the social and cultural values of those whose views are considered. This thesis uniquely targeted diverse groups and employed a combination of different methods from a variety of disciplines. By doing this the study has increased understanding of the views of two groups (campaigners and farmers) who are crucial to the uptake of the technology, and who are seldom researched in the area of attitudes to GM technologies. The diversity of groups, methods and disciplines brought together in this thesis is important because the issue of GM has proved to be complex and far-reaching, and previous discussions of risk perceptions have been complex and disjointed. All groups investigated here are stakeholders in the process, and as such their views and concerns relating to risk perceptions of GM technologies ought to be taken into consideration.
233

Effect of ingredients on the quality of frozen dough

Hung, May Mei-Jiun. January 1986 (has links)
Call number: LD2668 .T4 1986 H864 / Master of Science / Grain Science and Industry
234

Extrusion, physico-chemical characterization and nutritional evaluation of sorghum-based high protein, micronutrient fortified blended foods

Joseph, Michael Vadakekara January 1900 (has links)
Doctor of Philosophy / Department of Grain Science and Industry / Sajid Alavi / The feasibility of using a wheat flour mill to refine corn, sorghum and cowpea was studied. Milling of white sorghum grain resulted in decrease in fiber content from 1.89% to 0.38% and 0.45% in raw, finely milled and coarsely milled sorghum respectively. Similarly, there was a reduction in fat (3.17% to 1.75% and 0.51%) content from raw to fine and coarse milled fractions. Starch content increased from 61.85% in raw to 69.80% in fine and 72.30% in coarse fractions. Protein content was almost unchanged at about 7.40% in all the fractions. In de-hulling and milling of cowpeas, starch and protein content increased whereas fiber, fat and ash content decreased. There was a significant difference in expansion characteristics between whole and decorticated binary blends on account of different levels of inherent starch content. Sorghum cowpea (SC) blends had the highest specific mechanical energy (SME) range (285.74 – 361.52 kJ/kg), followed by corn soy (CS) (138.73 – 370.99 kJ/kg) and the least SME was found in sorghum soy (SS) blends (66.56 – 332.93 kJ/kg). SME was found to be positively correlated to starch content in the blends. SC blends had the most stable process followed by SSB and CSB in that order. The milling of expanded extrudates was found to be dependent on bulk density and low bulk density extrudates had bigger particle size and vice-versa. The water absorption index (WAI) for SC was 4.17 g/g to 5.97 g/g, SS ranged from 2.85 g/g to 5.91 g/g and CS ranged from 2.63 g/g to 5.40 g/g. Starch gelatinization ranged from 85.42 – 98.83% for SC, 90.70 – 96.27% for SS, and 72.57 – 95.49% for CS. The starch digestibility increased after extrusion and cooking but there was no significant change in protein digestibility. There was a significant reduction in anti-nutritional factors – phytic acid (26.06 – 44.03%), tannins (18.69 – 26.67%) and trypsin inhibitor (16.55 – 50.85%) after extrusion. Thus, the study showed that high protein blends with superior nutrition density needed for preparation of FBFs could be produced by using existing/traditional milling capabilities and extrusion process.
235

The use of chemical leavening in frozen doughs

Holm, Jill T. January 1986 (has links)
Call number: LD2668 .T4 1986 H645 / Master of Science / Grain Science and Industry
236

The Misguided War on Processed Food: How and How Not to Reduce Obesity

Lindsey, Erica January 2018 (has links)
Thesis advisor: Joseph Quinn / The obesity epidemic is highly prevalent, growing and costly to the American public. The burden of obesity-related healthcare and productivity costs fall on employers, the government and the public at large, making it a cause of concern for all. Processed foods have received much of the blame for rising obesity rates in the United States, creating an "organic revolution." However, fast food giants still dominate the market. Changes such as mandated calorie labeling on menus and fat taxes have been attempted, but obesity rates are still growing. Policy action to successfully reduce and prevent obesity must target food environments, influence individual behavior, and support health services. / Thesis (BA) — Boston College, 2018. / Submitted to: Boston College. College of Arts and Sciences. / Discipline: Departmental Honors. / Discipline: Economics.
237

Alimentos funcionais como estratégia de inovação na indústria de alimentos processados : o caso da Nestlé /

Moura, Elizangela Maria de. January 2016 (has links)
Orientador: Rogerio Gomes / Banca: Silvia Angélica Domingues de Carvalho / Banca: Sebastião Neto Ribeiro Guedes / Resumo: A inovação vem sendo inserida em diversos setores como fator fundamental para reposicionar empresas e países. O presente trabalho propõe um estudo analítico sobre o desenvolvimento de inovação e diferenciação de produto por parte da empresa suíça Nestlé, líder em estrutura e faturamento no mercado mundial da Indústria de Alimentos Processados (IAP), que vem investido desde 2000 no segmento de alimentos funcionais e desde 2011 vem se diversificando em direção a indústria farmacêutica por meio da criação de duas organizações, uma se refere a Nestlé Ciência da Saúde S.A., onde são desenvolvidos produtos voltados à saúde e a outra diz respeito ao Instituto de Ciências da Saúde da Nestlé, no qual são desenvolvidas pesquisas de biotecnologia para analisar DNA humano e assim oferecer produtos personalizados. O objetivo do estudo é investigar os principais fatores que levaram essa gigante em alimentos se diversificar em direção à indústria farmacêutica para promover inovação de produto, traduzidos aqui como alimentos voltados à saúde. Isso significa observar as características e determinantes da inovação da Nestlé, durante as duas últimas décadas, a fim de analisar a existência de uma relação entre a inovação de produto na forma de alimentos funcionais e a tendência dessa grande empresa de alimentos processados em se diversificar em direção à indústria farmacêutica como forma de competição; bem como, identificar o impacto da inovação do produto sobre sua quantidade de vendas, lucros ... (Resumo completo, clicar acesso eletrônico abaixo) / Abstract: Innovation has been inserted in varioussectors as a key factor to reposition companies and countries. This paper proposes an analytical study about the development of innovation and differentiation of product by the Swiss company Nestlé, leader in structure and sales in the global market for Processed Foods Industry, which since 2000 has invested in the functional food segment and since 2011 has diversified towards the pharmaceutical industry through the creation of two organizations: the first one refers to Nestlé health Science SA, where are developed products aimed at health, and the second one concerns to the health Sciences Institute of Nestle where biotechnology research is designed to analyze human DNA and thus offer customized products. The purpose is to investigate the main factors that led the giant in food diversify toward the pharmaceutical industry to promote product innovation, translated here like food that focus is on health. This means, observing the characteristics and determinants of Nestlé innovation in the last two decades, for the purpose of analyze the existence of a relationship between product innovation in the form of functional foods and the trend of this great food company processed in diversification into toward the pharmaceutical industry as a means of competition; and identify the impact of product innovation on their quantity of sales, profits and market share in the world and in Brazil. Recent literature shows that the life cycle of the Industry Product Processed Food (IAP) has been reduced owing to the introduction of innovations, several focused on differentiation, but some innovations sight to consolidate a new technological path for the industry. / Mestre
238

Cúrcuma (Curcuma longa L.): avaliação de suas nanopartículas em um modelo animal de depressão / Turmeric (Curcuma longa L.): evaluation of their nanoparticles in an animal model of depression

Barankevicz, Gizele Bruna 03 December 2018 (has links)
Os objetivos desse estudo foram caracterizar modelos experimentais validados para avaliação da depressão em animais; avaliar a viabilidade do desenvolvimento de nanopartículas de cúrcuma a partir do encapsulamento com zeína pelo método de dispersão líquido-liquido; avaliar sua possível atividade antidepressiva em ratos submetidos ao protocolo de estresse crônico moderado e imprevisível (ECMI), considerado modelo preditivo para indução de depressão. No protocolo experimental foram utilizados 40 ratos da linhagem Sprague- Dawley divididos em 5 grupos (n=8 ratos/grupo): Estresse crônico moderado e imprevisível+nanopartículas (ECMI+NANO), Nanopartícula + Controle (NANO), Estresse crônico moderado e imprevisível + Veículo (ECMI), Estresse crônico moderado e imprevisível + fluoxetina (ECMI+FLUOX), Controle + Veículo (CONTROLE) sendo veículo a água filtrada,também utilizada para ressuspender as nanopartículas. A avaliação de anedonia, considerada chave para mensuração do ECMI, confirmou que o protocolo foi efetivo para avaliar esse comportamento. No TNF observou-se que, os grupos estressados apresentaram maiores valores de imobilidade, comportamento similiar ao desamparo aprendido. A administração de nanopartículas (10 mg kg-1) preveniu a elevação dos níveis de corticosterona em ratos submetidos ao protocolo de ECMI. Estes dados sugerem que as nanopartículas de zeína contendo cúrcuma podem contribuir para uma possível ação neuroprotetora deste alimento funcional na depressão Além disso, comprovou-se que o encapsulamento possibilitou a elaboração de nanopartículas com boas características, apresentando alta eficiência de encapsulamento e baixo índice de polidispersão. / The objectives of this study were to characterize validated experimental models for the evaluation of depression in animals; to evaluate the viability of the development of turmeric nanoparticles from the zein encapsulation by the liquid-liquid dispersion method; to evaluate its possible antidepressant activity in rats submitted to the chronic mild and unpredictable stress procedure (CMUS), considered a predictive model for induction of depression. In the experimental protocol, 40 Sprague-Dawley rats were divided into 5 groups (n = 8 rats / group): chronic mild and unpredictable stress procedure + nanoparticles (CMUS + NANO), Nanoparticle + Control (NANO), chronic mild and unpredictable stress procedure + Vehicle (CMUS), chronic mild and unpredictable stress procedure + fluoxetine (CMUS + FLUOX), Control + Vehicle (CONTROL) being a filtered water vehicle, also used to resuspend the nanoparticles. The evaluation of anhedonia, considered key to CMUS measurement, confirmed that the protocol was effective in evaluating this behavior. In TNF, it was observed that the stressed groups showed higher values of immobility, a behavior similar to learned helplessness. The administration of nanoparticles (10 mg kg-1) prevented the elevation of corticosterone levels in rats submitted to the CMUS protocol. These data suggest that turmeric- containing zein nanoparticles may contribute to a possible neuroprotective action of this functional food in depression. In addition, it was verified that the encapsulation allowed the elaboration of nanoparticles with good characteristics, presenting high encapsulation efficiency and low polydispersion index
239

Percepção neural da alergia alimentar: envolvimento de mecanismos dependentes de IgE e das fibras nervosas do tipo C / Neural correlates of food allergy: role of IgE-dependent mechanisms and sensory C-fibers

Basso, Alexandre Salgado 20 August 2004 (has links)
Embora alguns estudos tenham considerado a possibilidade da existência de uma relação direta entre alergia alimentar e alterações de comportamento, são escassas as evidências que sustentem esta hipótese. Relatamos neste trabalho que, após desafio oral com o antígeno, camundongos sensibilizados com ovalbumina (OVA) apresentaram maiores níveis de ansiedade, maiores níveis séricos de corticosterona e aumento da imunorreatividade para Fos no núcleo paraventricular do hipotálamo (PVN) e no núcleo central da amígdala (CeA), áreas cerebrais relacionadas com emotividade. Os neurônios ativados pela alergia alimentar no PVN e no CeA são capazes de produzir fator liberador de corticotrofina (CRF). Os dados também demonstraram que a alergia alimentar leva à ativação do núcleo do trato solitário (NTS). Além disso, observamos que animais imunizados com OVA desenvolveram aversão à ingestão de uma solução contendo clara de ovo. Um tratamento com anticorpo anti-IgE ou a indução de tolerância oral bloquearam tanto o desenvolvimento da aversão à dieta contendo o antígeno quanto a expressão de c-fos no sistema nervoso central (SNC). Para investigar o modo pelo qual se dá a comunicação entre o cérebro e o intestino de animais com alergia alimentar, tratamos camundongos neonatalmente com capsaicina visando a destruição de fibras sensoriais do tipo C. O tratamento com capsaicina, embora não tenha impedido o desenvolvimento da aversão, diminuiu a sua magnitude. Ademais, este tratamento bloqueou completamente a ativação do PVN e diminuiu a expressão de c-fos induzida pela alergia alimentar no núcleo do trato solitário (NTS). Contudo, o tratamento com capsaicina não modificou a imunorreatividade para Fos no CeA de animais imunizados desafiados por via oral com o antígeno. Estes resultados demonstram claramente que a alergia alimentar influencia a atividade do SNC e o comportamento animal. Além disso, os dados obtidos evidenciam a participação de mecanismos dependentes de IgE e das fibras do tipo C na comunicação entre cérebro e o intestino de animais com alergia alimentar. De modo geral, além de enfatizar a relevância da integração entre os sistemas imune e nervoso na elaboração de respostas adaptativas, este estudo fornece subsídios para uma melhor compreensão de possíveis desordens de natureza psicológica em pacientes alérgicos. / Although many authors have considered the possibility of a direct interaction between food allergy and behavioral changes, the evidence supporting this hypothesis is elusive. Here we show that after oral OVA challenge allergic mice present higher levels of anxiety, increased serum corticosterone, and increased Fos expression in the paraventricular nucleus of the hypothalamus (PVN) and in the central nucleus of the amygdala (CeA), which are both emotionality-related brain areas. Food allergy-activated neurons in the PVN and in the CeA are able to produce CRF. We found that food allergy also induced enhanced Fos immunoreactivity in the nucleus of tractus solitarii (NTS) of OVA-immunized animals. Besides that, OVA-immunized animals developed aversion to an antigen-containing solution. Treatment with anti-IgE antibody, or induction of oral tolerance abrogated both food aversion and the expression of c-fos in the central nervous system. In order to investigate the brain-gut communication in allergic animals, we have employed destruction of sensory C fibers by neonatal capsaicin treatment. Although this treatment did not block development of food aversion, it decreased the magnitude of such aversion. Moreover, we observed that while the degree of Fos staining in the NTS of allergic mice was only diminished by neonatal capsaicin, it was completely blocked in the PVN. However, capsaicin did not modify food alergy-induced c-fos expression in the CeA. Besides establishing a direct relationship between brain function and food allergy, our findings provide evidence showing that IgE-dependent mechanisms and the sensory C fibers play an important role in food allergy signaling to the mouse brain. Finally, this study creates a solid ground for understanding the etiology of psychological disorders in allergic patients.
240

Consumo de adoçantes e produtos dietéticos por indivíduos com diabetes mellitus tipo 2, atendidos pelo Sistema Único de Saúde em Ribeirão Preto - SP / Consumption of sweeteners and dietetic foods by individuals with type 2 diabetes mellitus, assisted by the National Health System (SUS) in Ribeirão Preto - SP

Oliveira, Paula Barbosa de 07 August 2009 (has links)
OLIVEIRA, P. B. Consumo de adoçantes e produtos dietéticos por indivíduos com diabetes mellitus tipo 2, atendidos pelo Sistema Único de Saúde em Ribeirão Preto SP. 2009. 84 f. Dissertação (Mestrado em Saúde na Comunidade). Faculdade de Medicina de Ribeirão Preto-USP. Devido às suas complicações crônicas, o diabetes mellitus (DM) apresenta impacto considerável como problema de saúde pública pela morbidade, mortalidade e custos no seu tratamento. Para obter um bom controle metabólico, a educação alimentar é um dos pontos fundamentais no seu tratamento. O uso de adoçantes e alimentos dietéticos é importante para as pessoas com DM, apesar de serem dispensáveis na alimentação. Este setor cresceu nos últimos anos e atualmente 35% dos lares brasileiros consomem algum tipo de produto light ou diet. Diante das dificuldades e do pouco conhecimento dos indivíduos com DM sobre o uso destes produtos, verificou-se a necessidade de coletar informações sobre o assunto para subsidiar programas educativos. Este estudo tem como objetivo analisar o consumo de adoçantes e produtos dietéticos por indivíduos com diabetes tipo 2 (DM2), atendidos pelo Sistema Único de Saúde em Ribeirão Preto-SP. Os dados foram obtidos por meio de um questionário envolvendo variáveis sóciodemográficas, clínicas, relacionadas à hábitos alimentares e ao uso de produtos dietéticos e adoçantes, aplicado em uma amostra de 120 pacientes, sendo 60 do sexo feminino e 60 do sexo masculino, estratificados em adultos e idosos. Metade da amostra foi entrevistada no Centro de Saúde Escola da FMRPUSP (nível secundário de atendimento) e a outra metade nos Núcleos de Saúde da Família (nível primário de atendimento), vinculados à FMRP-USP, após concordância em participar do estudo e assinatura do termo de consentimento. As análises foram realizadas com ajuda do software Epi-Info e consistem na descrição das variáveis de interesse, com realização de comparação, entre sexos, faixa etária e nível de atendimento (primário e secundário). Aplicou-se o teste exato de Fisher e fixou-se o valor de p em 0,05. A média de idade dos entrevistados foi de 63,1 anos (± 10,5) e a duração do diagnóstico médio de DM de 9,8 anos (± 8,6). Os resultados encontrados mostram que a maioria apresentou sobrepeso ou obesidade. O uso de adoçante é freqüente na população em estudo, com predomínio do tipo líquido, e o uso de produtos dietéticos é menor, porém significativo, com predomínio dos refrigerantes. O diagnóstico do DM foi determinante para o uso de ambos e o critério de seleção mais utilizado para os usuários de adoçante foi o sabor. É pequena a porcentagem da população estudada que sabe a diferença entre produto diet e light, que tem o hábito de ler o rótulo dos alimentos e que se preocupa com a quantidade utilizada de adoçante. Conclui-se que é uma necessidade a inclusão de informações sobre o uso adequado de adoçantes e produtos dietéticos nas atividades assistenciais aos pacientes com diabetes nos diversos níveis do Sistema Único de Saúde, levando em consideração as características educacionais da população assistida. / OLIVEIRA, P. B. Consumption of sweeteners and dietetic foods by individuals with type 2 diabetes mellitus, assisted by the National Health System (SUS) in Ribeirão Preto - SP. 2009. 84 f Dissertation (Master Degree). Faculdade de Medicina de Ribeirão Preto-USP. Due to its chronic complications, diabetes mellitus presents considerable impact as public health problem for the morbidity, mortality and costs in its treatment. To get a good metabolic control, the nutritional education is one basic point for its treatment. The use of sweeteners and dietetic foods is important for persons with diabetes, although dispensable in the diet. This sector had an important growth in recent years and presently, 35% of the Brazilian homes consume some type of light or diet products. Ahead of the difficulties and the limited knowledge of individuals with diabetes about the use of these products, it was identified the necessity to collect information about this issue to subsidize educative programs. This study has the objective to analyze the consumption of sweeteners and dietetic foods by individuals with type 2 diabetes, assisted by the Brazilian National Health System (SUS Sistema Único de Saúde), in the city of Ribeirão Preto-SP. Data were collected through a questionnaire involving variables as: socio-demographic, life style, history of illness and consumption of dietetic foods and sweeteners in a sample of 120 diabetic patients, being 60 women and 60 men, stratified in adults and elderly. Half of the sample was interviewed in the CSE of the FMRP-USP and the other half in the NSF, tied to the FMRP-USP, after signature of the informed consent form. The analysis was carried through the software Epi-Info and consisted of description of variables of interest, with comparison between sex, age-group and level of attendance. The test of Fisher was applied and was fixed the value of p as 0,05. The mean age of the individuals was 63,1 years (± 10,5) and the average duration of the diagnosis of diabetes was 9,8 years (± 8,6). The sample is characterized by individuals classified between overweight and obesity. The use of sweeteners is very frequent by the population in study, with predominance of the liquid type, and the use of dietetic foods is less common, but significant, with predominance of soft drinks. The diagnosis of diabetes was determinant for starting the use of both and the used criterion for selection of the sweetener is its flavor. The percentage of the population that knows the difference between diet and light products, that has the habit to read labels and that is worried with the amount used of sweetener, is small. In conclusion, there is a need to include informations about the adequate use of sweeteners and dietetic products in the health care activities for patients with diabetes in the different levels of the Brazilian National Heath System, taking in consideration the educational characteristics of the target population.

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