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Full-Text Articles in Life Sciences

Microcystins And Liver Disease Mortality, Insights From An Ecological Study, Rajesh Tirpaul Melaram Jan 2020

Microcystins And Liver Disease Mortality, Insights From An Ecological Study, Rajesh Tirpaul Melaram

Walden Dissertations and Doctoral Studies

Microcystins (MCs) are toxic secondary metabolites produced by freshwater cyanobacteria. Algal bloom subsidence can stimulate MC release, which can impair liver function if orally exposed to in large doses. The purpose of this retrospective, U.S. ecological study was to determine if MC exposure represented an environmental risk factor for liver disease mortality using a socioecological approach. A longitudinal ecological substudy investigated the association between average total MCs in Lake Washington and Lake Manatee and age-adjusted chronic liver disease (CLD)/cirrhosis death rates in Brevard County and Manatee County, Florida (FL). A prediction model of total MCs was deduced by ...


The Role Of Glucose Level On The Performance Of The Framingham Risk Score, Uohna June Thiessen Jan 2019

The Role Of Glucose Level On The Performance Of The Framingham Risk Score, Uohna June Thiessen

Walden Dissertations and Doctoral Studies

Cardiovascular diseases (CVD) are responsible for more deaths than any other disease, continue to threaten the quality of life for many, and is a major burden to the health care system. The Framingham Heart Study (FHS) identified the major CVD risk factors that became essential to effective CVD screening strategies and the Framingham Risk Score (FRS), is used to assess CVD risk. Based on the concepts of the health behavior model and CVD as a cardiometabolic disorder, multivariate logistic regression analysis was used to evaluate the association between fasting blood glucose (FBG) levels and a CHD event, and to determine ...


Exploring Strategies To Integrate Disparate Bioinformatics Datasets, Charbel Bader Fakhry Jan 2019

Exploring Strategies To Integrate Disparate Bioinformatics Datasets, Charbel Bader Fakhry

Walden Dissertations and Doctoral Studies

Distinct bioinformatics datasets make it challenging for bioinformatics specialists to locate the required datasets and unify their format for result extraction. The purpose of this single case study was to explore strategies to integrate distinct bioinformatics datasets. The technology acceptance model was used as the conceptual framework to understand the perceived usefulness and ease of use of integrating bioinformatics datasets. The population of this study included bioinformatics specialists of a research institution in Lebanon that has strategies to integrate distinct bioinformatics datasets. The data collection process included interviews with 6 bioinformatics specialists and reviewing 27 organizational documents relating to integrating ...


Public Elementary School Teachers' Experiences With Implementing Outdoor Classrooms, Lori Schultz Goff Jan 2018

Public Elementary School Teachers' Experiences With Implementing Outdoor Classrooms, Lori Schultz Goff

Walden Dissertations and Doctoral Studies

Children experience limited time outdoors and have few opportunities for outdoor learning in schools, putting them at risk for being unprepared to engage in solving environmental and societal problems. Researchers have examined outdoor learning at the preschool and high school levels; elementary school experiences have been explored less frequently. Guided by a conceptual framework informed by social emotional learning (SEL), ecological literacy, and teacher self-efficacy, this study investigated public school elementary teachers' experiences with outdoor classrooms including barriers and supports to creating and using outdoor classrooms. A qualitative design using in-depth interviews with interpretive phenomenological analysis techniques was conducted with ...


Successful Climate Change Strategies In Corporate Farming In North America, Deann Renee Reaves Jan 2018

Successful Climate Change Strategies In Corporate Farming In North America, Deann Renee Reaves

Walden Dissertations and Doctoral Studies

The impact of climate change on agriculture is evident in changing growing seasons, crop yield, crop quality, and even complete crop losses. Changing climate conditions negatively affect the profitability of agricultural organizations. This study was a single descriptive case of one agricultural corporation in the western United States. The purpose was to identify and explore successful climate change-based sustainability strategies. The conceptual framework for this study was legitimacy theory. The data collection methods consisted of a semistructured interview of a corporate exectutive and obtaining corporate documents, including the annual report from the company's website. Data were analyzed using content ...


Food Waste Reduction Strategies In Supermarkets: The Lived Experiences Of Perishable Food Managers In Michigan, Kelly K. Zimmermann Jan 2017

Food Waste Reduction Strategies In Supermarkets: The Lived Experiences Of Perishable Food Managers In Michigan, Kelly K. Zimmermann

Walden Dissertations and Doctoral Studies

At the retail level, 25% of sellable food is wasted, and perishable foods account for 72% of food waste in the United States. The purpose of this qualitative phenomenological study was to explore the food waste reduction strategies used by supermarket perishable food department managers, which are covered under the Good Samaritan Food Donation Acts (state and federal). The participant population was comprised of 17 managers who are responsible for perishable foods departments (bakery, deli, meat, dairy, and produce) at local, regional, and national supermarkets in Midland, Michigan. Goal systems theory served as the conceptual framework lens for which the ...


Relationship Between The California Drought And Almond Demand, Wayne E. Lacy Jan 2017

Relationship Between The California Drought And Almond Demand, Wayne E. Lacy

Walden Dissertations and Doctoral Studies

Areas of California's Central Valley are sinking at rates up to 1 foot per year due to subsidence caused, in part, by the state's years-long drought, challenging growers to locate additional water sources for their crops. Supply and demand theory guided this correlational study. The purpose of the study was to examine the financial impact of drought on almond demand. This study included annualized historical almond industry data for the United States (N = 97), downloaded from a United States Department of Agriculture database. The results of multiple linear regression analysis indicated that the model was capable of predicting ...


Methylmercury Exposure Via Canned Tuna Fish Consumption And Breast Cancer, Jennifer Bodenrader Jan 2016

Methylmercury Exposure Via Canned Tuna Fish Consumption And Breast Cancer, Jennifer Bodenrader

Walden Dissertations and Doctoral Studies

Widespread consumption of canned tuna fish since the 1950s may explain some of the increase in breast cancer prevalence in the United States and Europe. Although canned tuna is the primary source of human exposure to methylmercury, its role as an estrogen activating metalloestrogen has been overlooked in the etiology and incidence of breast cancer. Carcinogenic theory asserts that increased exposure to estrogen elevates the risk of breast cancer. The purpose of this population-based, case control study was to examine the association between canned tuna consumption, total blood mercury, and breast cancer in the NHANES 2003-2006 surveys. A multivariable logistic ...


Exploring Factors Influencing Information Technology Portfolio Selection Process In Government-Funded Bioinformatics Projects, Braulio J. Cabral Jan 2016

Exploring Factors Influencing Information Technology Portfolio Selection Process In Government-Funded Bioinformatics Projects, Braulio J. Cabral

Walden Dissertations and Doctoral Studies

In 2012, the National Cancer Institute's (NCI) Board of Scientific Advisors (BSA) conducted a review of the Center for Biomedical Informatics and Information Technology's (CBIIT) bioinformatics program. The BSA suggested that the lack of a formal project selection process made it difficult to determine the alignment of projects with the mission of the organization. The problem addressed by this study was that CBIIT did not have an in-depth understanding of the project selection process and the factors influencing the process. The purpose of this study was to understand the project selection process at CBIIT. The research methodology was ...


Correlation Analysis Of Climatic Variables, Migration And Dengue Cases In Southeast Florida, Brunilda Lugo Jan 2015

Correlation Analysis Of Climatic Variables, Migration And Dengue Cases In Southeast Florida, Brunilda Lugo

Walden Dissertations and Doctoral Studies

Dengue fever is a debilitating, viral, mosquito-borne disease occurring in tropical and subtropical areas in the world. The majority of dengue cases in the United States were acquired in endemic areas by travelers or immigrants. However, in recent years, autochthonous (locally acquired) dengue cases have been diagnosed in Florida. The purpose of this study was to find an association between potential risk factors and the expansion of dengue fever in the United States. Guided by the eco-bio-social framework, which offers a broad assessment of risk factors for the illness, a retrospective design was used with archival data to correlate changes ...


Effect Of Neighborhood Features On Bmi Of African American Adolescents In South Los Angeles, Francisca Omelogo Obiora Jan 2015

Effect Of Neighborhood Features On Bmi Of African American Adolescents In South Los Angeles, Francisca Omelogo Obiora

Walden Dissertations and Doctoral Studies

Childhood obesity is a major national and worldwide public health crisis. The occurrence of childhood obesity, caused to large extent by an imbalance between caloric intake and caloric expenditure, has increased in the last 30 years. Although the prevalence of obesity has stabilized in recent years, it remains a top public health concern in the United States, especially in urban centers. The purpose of this study was to examine the associations between diet, physical activity, and the built environment in relation to the mean body mass index (BMI) of adolescents aged 12 to 17 years living in South Los Angeles ...


Rural Year-Round Growing To Ameliorate A Possible Negative Effect From Climate Change, Kimberlie A. Brussa Jan 2015

Rural Year-Round Growing To Ameliorate A Possible Negative Effect From Climate Change, Kimberlie A. Brussa

Walden Dissertations and Doctoral Studies

The Intergovernmental Panel on Climate Change (IPCC) suggested that, as the world population grows, food and water shortages will become even more serious issues (IPPC's 2014 predictions about the future effects of climate change (CC), Year-round growing (YRG) may provide a way for communities to extend growing seasons, expand local farm systems, and provide food year round. This case study included a detailed analysis of responses from representatives of all sectors of rural Mesa County, Colorado, regarding YRG and a local food and farm plan due to CC. The case was bounded by time (6 months of data collection ...


A Meta-Analysis Of Association Between One-Carbon Metabolism Gene Polymorphisms And Risk Of Prostate Cancer, Mahmood Tazari Jan 2015

A Meta-Analysis Of Association Between One-Carbon Metabolism Gene Polymorphisms And Risk Of Prostate Cancer, Mahmood Tazari

Walden Dissertations and Doctoral Studies

Prostate cancer is the most common cancer among men. The purpose of this quantitative, meta-analysis study was to examine one-carbon metabolism gene polymorphisms in a group of genes to determine their association with prostate cancer risk. The genetic epidemiology theory provided the framework for the study. The data collected were from published articles. From over 2,800 individual studies, 20 articles were retained for results and data abstraction, following the title, abstract screen, and full text screening in the second phase. The data were analyzed by a meta-analysis statistical method, combining the results from selected studies to estimate the overall ...


Assessment, Referral, And Self Perception In Binge Eating And Obesity Among Adults, Mary Solberg Jan 2011

Assessment, Referral, And Self Perception In Binge Eating And Obesity Among Adults, Mary Solberg

Walden Dissertations and Doctoral Studies

In the past 30 years, binge eating and obesity has increased among all age groups due to lifestyle, environment, social, and biological reasons. To change eating habits, individuals may have to collaborate with others beyond the medical professional. Societal impacts of binge eating and obesity include increases in insurance rates, medical costs, and increased early-age mortality. The purposes of this study were to assess how individuals are referred to other professionals if they self-identify as binge eaters or obese and to understand personal awareness individuals had of binge eating and obesity. Cognitive behavioral theory was used as the theoretical foundation ...