Peer-Reviewed Journal Articles

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    Black and White Biracial Marriage in the United States
    (2017) Robinson, Marlon
    This article looks at marital quality in Black and White biracial marriage in the United States. It gives an overview of some of the statistics of Black and White biracial marriage. The current article also highlights variables associated with marital quality in Black and White biracial marriage such as racial differences, probability for divorce, racial identity, age, socioeconomic status, and number of children. Several practical suggestions for helping this population are pulled together at the end of the article.
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    Shared Leadership: A Rediscovery of an Old Paradigm and Its Historical Context
    (2018) Robinson, Marlon
    The paradigm shift in the leadership field has resulted in several contemporary approaches to leadership. These approaches focus on process as opposed to traits-the emphasis of the traditional approaches. The purpose of this article is to examine shared leadership: the historical background, biblical foundation, differences between traditional leadership and shared leadership, dissimilarities of shared leadership and teamwork, benefits and limitations, and shared leadership in practice. Several benefits of shared leadership are highlighted, such as increased trust among team members and performance improvement. While shared leadership has several advantages, leaders need to be aware that it does not fit for every context.
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    Dietary Pentosanase Supplementation of Diets Containing Different Qualities of Wheat on Growth Performance and Metabolizable Energy of Turkey Poults
    (2004) Santos, Anael A. Jr
    Wheat varies in apparent metabolizable energy N-corrected (AMEn) due to the presence of non-starch polysaccharides (NSP), which can be improved by dietary enzyme supplementation. Poults from 0-17 d-age were fed diets containing various wheat sources (WS) with or without Natugrain Blend® (NB) (BASF, Germany). Five replicate cages of 10 poults were assigned to each eight-soybean-meal/wheat treatment diets and a control soybean-meal/corn diet. The treatments were a factorial arrangement of 4 WS (A, B, C, D) and 2 enzyme levels (0 and 200 mg NB/kg). The WS differed by the degree of frost damage during seed development. Regardless of the source of wheat, NB increased 17 d BW (351 vs 381 g, P < 0.001), decreased 1-17 d FCR (1.55 vs 1.49, P < 0.05), increased AMEn (2,204 vs 2,455 kcal/kg, P < 0.001), and increased apparent nitrogen retention (ANR) (35.0 vs 41.4 %, P < 0.05). No effects of WS were seen on growth performance, but WS A and B had higher (P < 0.05) AMEn than sources C and D (2,396 and 2,460 vs 2,246 and 2,216 kcal/kg, respectively). Gut viscosity was higher (P < 0.05) in poults fed wheat-based diets than the control diet. Enzyme supplementation to the wheat-based diets decreased viscosity (5.57 vs 3.98 cP, P < 0.05) to a level similar to the corn-based control diet, and it resulted in equivalent growth performance. Viscosities were negatively correlated with AMEn. The results demonstrated a positive effect of enzyme supplementation on nutrient utilization and performance of turkeys.
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    Dietary Supplementation of Endoxylanases and Phospholipase for Turkeys Fed Wheat-based Rations
    (2004) Santos, Anael A. Jr
    The adverse effects of non-starch polysaccharides (NSP) on turkeys fed wheat-based diets may be alleviated by dietary supplementation of endoxylanase (to reduce the adverse effects of digesta viscosity) or phospholipase (to improve the digestibility of fat). BUTA toms were fed wheat-based diets containing one of 5 enzyme treatments: unsupplemented control, Natugrain Blend® (> 5,500 EXU/kg diet; NB), Lyxasan®-50 (> 2,250 EXU/kg diet; LX50), Lyxasan®-100 (> 5,500 EXU/kg diet; LX100), and Phospholipase (> 500 PLU/kg diet; PL) (BASF, Germany). Each treatment group was assigned to 8 pens containing 12 birds to evaluate growth performance (1-128 d), and 2 pens of 12 birds (excluding LX50) for the apparent metabolizable energy N-corrected (AMEn) and ileum viscosity determination (56-128 d). All enzyme treatments improved growth performance. In comparison to the control, dietary enzyme increased (P < 0.05) BW and decreased 1-128 d feed/gain (2.45 vs 2.37, P < 0.005). PL was most effective in reducing feed/gain during the starting phase and LX100 during the finishing phase, while NB had intermediate benefits throughout the experiment. PL increased AMEn from 9 to 12 wk, while NB and LX-100 resulted in the highest AMEn during the later finishing period. Viscosity was significantly higher for PL than the other treatments (13.5 vs 7.07 cP, P < 0.001). Growth performance and energy utilization of turkeys fed wheat-based diets can be significantly enhanced by phospholipase supplementation of starter feeds and endoxylanase supplementation of growing and finishing feeds. However, enzyme blends may provide a positive response regardless of turkey age.
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    Influence of Grain Particle Size and Insoluble Fiber Content on Salmonella Colonization and Shedding of Turkeys Fed Corn-Soybean Meal Diets
    (2006) Santos, Anael A. Jr
    This study aimed to determine the impact of feeding partially ground corn or insoluble fiber on intestinal development, Salmonella cecal colonization and fecal shedding of turkeys from 0-28d. Turkeys reared in cage-batteries were assigned to 1 of 3 diets: ground corn-SBM (GC, TRT 1), coarse ground corn-SBM (CC, TRT 2), and 4% wood shavings + ground corn-SBM (SC, TRT 3). A 3-strain cocktail of nalidixic acid-resistant Salmonella enterica serotypes Hadar, Javaina, and Typhimurium was orally-gavaged into each poult at placement. Cecal and fecal Salmonella populations, growth performance and intestinal weights and lengths were measured. The diets had no impact on Salmonella cecal or fecal populations. At 28d, Salmonella cecal populations decreased approximately 3-logs (range: 2.4-3.3 log reduction) across all treatments in comparison to 7d (P< 0.0001). At 28d body weight, body gain and feed conversion ratio were not impacted by the diets. However, at 14d poults consuming the SC diet had lower feed consumption than those fed the GC and CC diets (231 vs. 243 and 252 g, P=0.001, respectively). The CC diet resulted in heavier relative gizzard weights at 28d in comparison to the GC and SC diets (30 vs. 28 and 22 g/kg, respectively, P< 0.0001). Conversely, the SC treatment reduced the mass of the small intestine relative to body weight, especially the jejunum. Dietary inclusion of coarsely ground corn and wood shavings had no adverse effect on growth performance yet improved gizzard and intestinal development, which could have positive effects on intestinal health.
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    Determination of Ileum Microbial Diversity of Broilers Fed Triticale- or Corn-based Diets and Colonized by Salmonella
    (2007) Santos, Anael A. Jr
    Diversity of the bacterial communities in the ileum of broilers was characterized using denaturing gradient gel electrophoresis. Denaturing gradient gel electrophoresis separation of polymerase chain reaction amplicons of the V2–V3 variable regions of the 16S rDNA is a common method to profile community diversity and has been used to assess the effects of diet and antibiotics on the ileal bacterial community of chickens. Broilers raised either on litter floor or in cage batteries were fed either a finely ground corn- (control), a finely ground triticale-, or a whole triticale-based diet from 0 to 42 d. Microbial DNA was extracted from the ileum content of 42-d-old broilers, and the 16S rDNA gene was amplified by polymerase chain reaction and the amplicons separated by denaturing gradient gel electrophoresis. Diversity indexes including richness, evenness, diversity, and pairwise similarity coefficients were calculated. Diversity indexes were related to the dietary treatments, housing designs, and to changes in Salmonella colonization of broiler ceca as characterized by the most probable number method. Higher microbial diversity indexes were observed among birds fed whole triticale-based diets and reared on litter floors. In contrast, finely ground grain treatments had lower diversity and higher Salmonella prevalence than the whole triticale treatment. The data indicated that combination of high dietary fiber content and increased coarseness of the diet by feeding whole triticale stimulated microbial community diversity and discouraged Salmonella colonization, perhaps through a competitive exclusion-type mechanism.
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    Influence of Housing System, Grain Type and Particle Size on Salmonella Colonization and Shedding of Broilers Fed Triticale or Corn-Soybean Meal Diets
    (2008) Santos, Anael A. Jr
    Salmonella colonization in poultry may be influenced by grain type and particle size. Broilers reared either in nonlitter cage-based housing or in a conventionally floored litter house from 0 to 42 d were assigned to 1 of 4 dietary treatments: 1) ground corn-soybean meal (C, 560 μm), 2) coarsely ground corn-soybean meal (CC, >1,700 μm), 3) ground triticale-soybean meal (T, 560 μm), or 4) whole triticale-soybean meal (WT). A 4-strain cocktail of Salmonella enterica was orally gavaged into each chick at placement. Growth performance, cecal and fecal Salmonella populations, gizzard and proventriculus pH, intestinal size, jejunum histomorphometry, and carcass yields were measured. Broilers responded differently to the dietary treatments according to the housing system used. At 42 d, birds reared on litter and fed ground grain had greater BW than those fed coarse grain (2.87 vs. 2.71 kg), whereas cage-reared broilers fed ground triticale were heavier than those fed corn (2.75 vs. 2.64 kg). Broilers raised on litter had a better feed conversion ratio than those raised in cages (1.71 vs. 1.81 g/g). Independent of the housing system, relative eviscerated carcass weights of birds fed T and C were heavier than those of CC- and WT-fed broilers (762 vs. 752 g/kg). Generally, the jejunum villus area and mucosal depth were larger, whereas the small intestine was lighter and shorter in broilers raised on litter. Relative gizzard weights of broilers raised on litter and fed the coarser diets were heavier than those of broilers reared in cages and fed finely ground diets. Feeding whole or coarsely ground grains decreased cecal Salmonella populations in 42-d-old broilers (3.8, 3.9, 4.4, and 4.4 log most probable number/g for CC, WT, C, and T, respectively). Additionally, 42-d-old broilers reared on litter had lower cecal Salmonella populations than those in cages (3.8 vs. 4.4 log most probable number/g). In conclusion, as a feed ingredient, triticale is a good alternative to corn, resulting in improved BW and reduced Salmonella colonization. Broilers raised on litter may have achieved lower cecal Salmonella populations than caged birds because access to litter may have modulated the intestinal microflora by increasing competitive exclusion microorganisms, which discouraged Salmonella colonization.
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    Change in the Ileum Bacterial Population of Turkey Fed Different Diets and after Infection with Salmonella as Setermined with Denaturing Gradient Gel Electrophoresis Analysis of Amplified 16S Ribosomal DNA
    (2008) Santos, Anael A. Jr
    Changes in ileal bacterial populations of Salmonella-infected turkeys fed different diets were analyzed by using 16S-V3 PCR denaturing gradient gel electrophoresis. Turkeys raised on litter flooring were fed wheat- and corn-based diets with and without enzyme preparations (XY1 and XY2, respectively) from 0 to 126 d. Preparation XY1 contained exclusively endoxylanase, whereas preparation XY2 contained endoxylanase, protease, and α-amylase (Danisco, Wiltshire, UK). The dietary activity levels of XY1 and XY2 were 2,500 and 650 endo-1,4-β-xylanase units/kg of feed, respectively. Microbial DNA was extracted from the ileal content of 16-wk-old turkeys, and the 16S rDNA gene was amplified by PCR and analyzed by denaturing gradient gel electrophoresis. Diversity indexes, including richness (number of species, S), evenness (relative distribution of species, EH), diversity (using Shannon's index, H′), and Sorenson's pairwise similarities coefficient (measures the species in common between different habitats, Cs) were calculated. Additionally, diversity indexes were associated with Salmonella prevalence determined from fresh fecal droppings collected from each pen. On the basis of contrast analysis, the wheat-based diets resulted in higher microbial diversity indexes than the corn-based diets (S = 10 vs. 12; EH = 0.9 vs. 0.8; H′ = 2.2 vs. 1.9, P < 0.05). Likewise, enzyme supplementation stimulated growth of the microbiota and increased the diversity indexes in comparison with unsupplemented treatments (S = 13 vs. 10; EH = 0.9 vs. 0.8; H′ = 2.2 vs. 1.9, P < 0.05). Salmonella prevalence was higher (P < 0.05) at 15 wk in turkeys fed the corn-based diet (Salmonella prevalence = 50%) than in turkeys fed the corn-enzyme (Salmonella prevalence = 13%) and wheat-based (Salmonella prevalence = 0%) dietary treatments. Therefore, contrast analysis showed that birds fed the corn control diet had lower microbiota diversity but higher Salmonella prevalence than birds fed the enzyme-supplemented and wheat-based diets. In contrast, birds fed the wheat-based diets had higher diversity but lower Salmonella prevalence than birds fed the corn-based diets. High dietary nonstarch polysaccharides from wheat and dietary exogenous enzyme supplementation promoted microbial community diversity and apparently discouraged Salmonella colonization through competitive exclusion. Nonstarch polysaccharides and dietary exogenous enzyme supplementation may be practical tools to control enteric pathogens and benefit the intestinal health and food safety of the birds.
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    Organic Trace Minerals and 25-hydroxycholecalciferol Affect Performance Characteristics, Leg Abnormalities, and Biomechanical Properties of Leg Bones of Turkeys
    (2009) Santos, Anael A. Jr
    Leg problems and resulting mortality can exceed 1% per week in turkey toms starting at approximately 15 wk of age. Dietary supplementation of organic trace minerals (MIN) and 25-hydroxycholecalciferol (HyD) may improve performance, decrease incidence of leg abnormalities, and increase bone strength. Nicholas 85X700 toms were assigned to 4 treatments consisting of a factorial arrangement of 2 concentrations of MIN (0 and 0.1% of Mintrex PSe, which adds 40, 40, 20, and 0.3 mg/kg of Zn, Mn, Cu, and Se, respectively) and 2 concentrations of HyD (0 and 92 μg/kg of HyD). Diets were formulated to be equal in nutrient content and fed ad libitum as 8 feed phases. Feed intake and BW were measured at 6, 12, 15, 17, and 20 wk of age. Valgus, varus, and shaky leg defects were determined at 12, 15, 17, and 20 wk of age. Tibia and femur biomechanical properties were evaluated by torsion and bending tests at 17 wk of age. There were no treatment effects on BW. Only MIN significantly improved feed conversion ratio through to 20 wk of age. Cumulative mortality at 3 wk of age was greater among the MIN birds, but it was lower by 20 wk (P = 0.085). The MIN decreased the incidence of varus defects at 17 wk of age; shaky leg at 12, 15, and 17 wk of age; and valgus defects at 15, 17, and 20 wk of age. There were no MIN × HyD interaction effects on individual gait problems. Maximum load and the bending stress required for tibias to break in a 4-point assay were increased with MIN supplementation, especially when HyD was also added. Maximum shear stress at failure of femoral bones in a torsion assay was increased by supplementation with both MIN and HyD together. Dietary supplementation of MIN and HyD may improve biomechanical properties of bones. Dietary MIN supplementation may improve feed conversion of turkeys, likely by decreasing leg problems.
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    Influence of Housing System on Growth Performance and Intestinal Health of Salmonella-challenged Broiler Chickens
    (2012) Santos, Anael A. Jr
    Rearing chickens on litter floors or in cages may influence their performance, especially when they are colonized by enteric pathogens, such as Salmonella. Male Ross 308 broilers were randomly assigned to 32 litter floor (litter) pens in a curtain-sided house or 32 cages (cages) in a total confinement house (25 birds/pen or cage). Birds were orally inoculated with 106 CFU of a cocktail of S. enterica subsp. enterica at three days of age. Salmonella populations (SP), body weights, feed conversion ratio and the weights of spleen and liver relative to body weight were determined at 14, 28 and 42 days of age. At each time point, characteristics of the intestinal segments were scored as an indicator of gut health on 32 birds per house. SP was higher in litter than cages treatment at 14 days of age which corresponded with a higher incidence of mucoid jejunum exudate. In contrast, cages had higher incidence of ileal grain chips than litter at 14 days, indicating inferior gizzard function. At 42 days of age, litter birds had higher breast meat yield, heavier body weight and improved cumulative feed conversion ratio than those in cages. Although, birds raised on litter floors showed greater 14 day Salmonella colonization than cage-reared birds, their digestion capacity appeared superior. Birds reared on litter floors had fewer undigested feed particles in their distal small intestine which correlates with enhanced growth performance and breast meat yield.
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    Counselor and Workplace Wellness Programs: A Conceptual Model
    (2017) Saliba, Yvette
    Occupational stress is a top source of stress for over 65% of Americans due to extended hours in the workplace. Recent changes in health care have encouraged employers to build workplace wellness programs to improve physical and mental health for employees to mitigate the effects of occupational stress. Wellness programs focus on either disease management; treating chronic illnesses, such as hypertension and diabetes; lifestyle management; or preventing chronic illnesses through health promotion. This manuscript provides an overview of recent changes in health care and describes a conceptual framework, Steps to Better Health (S2BH), that counselors can use in workplace wellness programs. S2BH is an 8-week psychoeducational group based on the combination of motivational interviewing (MI) and the transtheoretical model of change (TTM).
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    Optimism in Trauma and Growth: A Path Analysis of Former War-related Displaced Persons
    (2018) Saliba, Yvette
    The study evaluated the contribution of war, trauma, and optimism on growth in adult Liberian former displaced persons traumatized by war-related experiences (N = 444). Hypotheses based on existing literature grounded the path model assessing the relationship among war-related events, trauma, optimism and post-traumatic growth. There were statistically significant correlations among all variables, except between war-related events and optimism [χ2(1) = 0.90; p > .05; CFI = 1.00; GFI = .99; SRMR = 0.02; RMSEA = 0.00]. Clinicians are encouraged to identify resources that traumatized populations use in coping, and incorporate them within the therapeutic environment.
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    Journal Sharing on Group Cohesion and Goal Attainment in Experiential Growth Groups
    (2018) Saliba, Yvette
    This study investigated the effect of journal sharing in counselor education experiential growth groups. Outcome measures included change in group cohesion over time and rate of group cohesion change after controlling for level of goal attainment. Counseling students were assigned to either treatment (i.e., journal sharing; n = 38) or control groups (i.e., non-journal sharing; n = 24). The control groups that did not share journals showed a significantly faster growth of the group cohesion than journal sharing groups. Implications for future research and counselor education programs are presented.