Browsing by Subject "Fiber"

Now showing 1 - 6 of 6
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    A Systematic Review and Meta-Analysis of Diet and Nutrient Intake in Adults with Irritable Bowel Syndrome
    (Wiley, 2024) Veraza, Diego Izquierdo; Calderon, Gerardo; Jansson-Knodell, Claire; Aljaras, Rawan; Foster, Erin D.; Xu, Huiping; Biruete, Annabel; Shin, Andrea; Medicine, School of Medicine
    Background: Numerous individual and environmental factors including diet may play an important role in the pathophysiology of irritable bowel syndrome (IBS). It is unclear to what degree dietary intake is affected in individuals with IBS. We aimed to perform a systematic review and meta-analysis to summarize dietary intake of adults with IBS and to compare dietary intake between adults with IBS and non-IBS controls. Methods: Ovid MEDLINE, Embase, Cochrane, CINAHL, and Scopus were searched through February 2023 for clinical trials and observational studies measuring usual diet in adults with IBS. Pooled weighted averages were estimated for total energy, macronutrient, and micronutrient data. Mean differences (MD) in nutrient intake were estimated for adults with IBS versus non-IBS controls using a random effects model. Heterogeneity was assessed by the inconsistency index (I2). Key results: Sixty-three full-text articles were included in the review of which 29 studies included both IBS and control subjects. Nutrients not meeting the recommended intake level for any dietary reference values in the IBS population were fiber and vitamin D. Meta-regression by female proportion was positively correlated with total fat intake and negatively correlated with carbohydrate intake. Comparisons between participants with IBS and controls showed significantly lower fiber intake in participants with IBS with high heterogeneity (MD: -1.8; 95% CI: -3.0, -0.6; I2 = 85%). Conclusions and inferences: This review suggests that fiber and vitamin D intake is suboptimal in IBS; however, overall dietary intake does not appear to be comprised. Causes and consequences of reduced fiber in IBS deserve further study. Results of this systematic review and meta-analysis suggest that fiber and vitamin D intake is suboptimal in IBS. However, overall intake of other macro- and micronutrients does not appear to be compromised. Causes and consequences of reduced fiber and Vitamin D intake in IBS deserve further study.
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    The effect of polymerization methods and fiber types on the mechanical behavior of fiber-reinforced composite resin
    (2015) Huang, Nan-Chieh; Chu, Tien-Min Gabriel; Hara, Anderson T.; Brown, David T.; Bottino, Marco C.; Levon, John A.
    Background: Interim restoration for a lost anterior tooth is often needed for temporary esthetic and functional purposes. Materials for interim restorations usually have less strength than ceramic or gold and can suffer from fracture. Several approaches have been proposed to reinforce interim restorations, among which fiber reinforcement has been regarded as one of the most effective methods. However, some studies have found that the limitation of this method is the poor polymerization between the fibers and the composite resin, which can cause debonding and failure. 64 Purpose: The purpose of this study was to investigate the effects of different polymerization methods as well as fiber types on the mechanical behavior of fiberreinforced composite resin. Material and Methods: A 0.2-mm thick fiber layer from strip fibers or mesh fibers embedded in uncured monomers w as fabricated with polymerization (two-step method) or without polymerization (one-step method), on top of which a 1.8-mm composite layer was added to make a bar-shape sample, followed by a final polymerization. Seventy-five specimens were fabricated and divided into one control group and four experimental groups (n=15), according to the type of glass fiber (strip or mesh) and polymerization methods (one-step or two-step). Specimens were tested for flexural strength, flexural modulus, and microhardness. The failure modes of specimens were observed by scanning electron microscopy (SEM). Results: The fiber types showed significant effect on the flexural strength of test specimens (F = 469.48; p < 0.05), but the polymerization methods had no significant effect (F = 0.05; p = 0.82). The interaction between these two variables was not significant (F = 1.73; p = 0.19). In addition, both fiber types and polymerization steps affected the flexural modulus of test specimens (F = 9.71; p < 0.05 for fiber type, and F = 12.17; p < 0.05 for polymerization method). However, the interaction between these two variables was not significant (F = 0.40; p = 0.53). Both fiber types and polymerization steps affected the Knoop hardness number of test specimens (F = 5.73; p < 0.05 for polymerization method. and F = 349.99; p < 0.05 for fiber type) and the interaction between these two variables was also significant (F = 5.73; p < 0.05). SEM images revealed the failure mode tended to become repairable while fiber reinforcement was 65 existed. However, different polymerization methods did not change the failure mode. Conclusion: The strip fibers showed better mechanical behavior than mesh fibers and were suggested for use in composite resin reinforcement. However, different polymerization methods did not have significant effect on the strength and the failure mode of fiber-reinforced composite
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    Impact of diet on hydrogen sulfide production: implications for gut health
    (Wolters Kluwer, 2023) Teigen, Levi; Biruete, Annabel; Khoruts, Alexander; Medicine, School of Medicine
    Purpose of review: Excessive hydrogen sulfide (H 2 S) production by the gut microbiota may contribute to the pathogenesis of multiple intestinal diseases, including colon cancer and ulcerative colitis. Therefore, understanding of dietary drivers of H 2 S production has potential implications for nutritional strategies to optimize gut health and treat intestinal diseases. Recent findings: Recent studies support a positive relationship between dietary protein intake and H 2 S production. However, protein rarely exists in isolation in the diet, and dietary fiber intake could reduce H 2 S production in humans and animals, even with ∼30% of calories derived from protein. Summary: These findings suggest that increased fiber intake may reduce H 2 S production irrespective of protein intake, enabling the ability to meet the metabolic demands of the illness while supporting gut health. Here we discuss two recent ulcerative colitis diet studies that illustrate this point.
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    Installation as a Sensory Vessel
    (2017) Sciore-Jones, Elizabeth J.; Winship, Andrew
    The tectonic plates of earth are in constant movement, floating on magma. The earth cracks and presses, creating mountain ranges and valleys. Water rushes in filling the crevasses, changing jagged bedrock into smooth curves, turning the seabed into a dry salt covered desert. The shift of the earth can be felt and the object-hood of a mountain range cannot be denied. Our origins are buried deep in the earth, creating a relationship between the self and the flesh of existence. The sensing matter of humanity is apodictic; confirmation is received from the nervous system as it interacts with primal environments, symbols, textures, and sounds. This information is processed phenomenologically, shaping how we think, communicate, and develop. As our contemporary minds grow further away from our intuition, we must look to the roots of our origin stories and how they merge withour modern sense of the sublime. I connect our contemporary phenomenological awareness to the primal origins of Earth, and humanity by utilizing video mapping, sound, sculptural paper-making and installation. Through this connection, I create sensory experiences to increase the viewer's awareness to their physical body and its causation.
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    Made Me/Sustains Me
    (2017) Bennett, Emily; Hull, Greg; Nordgulen, Eric; Giddings, Anita; King, Juliet
    My work strives to create catharsis through the construction of shared experiences rooted in identity and place. I do this by creating engaging sculptural works that viewers can interact with both mentally and physically. My visual research takes the form of houses, nests, or swings and references play, rest and prayer. These works become safe spaces for people to engage and form connections with those around them and within themselves. I intend to create enjoyable experiences for viewers with the purpose of gaining an opportunity for introducing deeper contemplation on ideas such as how identity forms over time, and through what means. My culminating thesis work encourages viewers to contemplate home and how our origin can deeply influence our identity.
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    Starchy and fibrous feedstuffs differ in their in vitro digestibility and fermentation characteristics and differently modulate gut microbiota of swine
    (Springer, 2022-05-03) Tiwari, Utsav P.; Mandal, Rabindra K.; Neupane, Kabi Raj; Mishra, Birendra; Jha, Rajesh; Pediatrics, School of Medicine
    Background Alternative feedstuffs may contribute to reducing feed costs of pig production. But these feedstuffs are typically rich in fiber and resistant starch (RS). Dietary fibers and RS are fermented in the gastrointestinal tract (GIT) and modulate the microbial community. Certain microbes in the GIT can promote host health, depending on the type of fermentation substrates available. In this study, six alternative feedstuffs (three starchy: Okinawan sweet potato, OSP; yam, and taro, and three fibrous: wheat millrun, WMR; barley brewers grain, BBG; and macadamia nut cake, MNC) were evaluated for their in vitro digestibility and fermentation characteristics and their effects on pig’s hindgut microbial profile. After 2 steps of enzymatic digestion assay, residues were fermented using fresh pig feces as microbial inoculum, and gas production was recorded periodically for 72 h and modeled for fermentation kinetics. After fermentation, the residual liquid phase was analyzed for short-chain fatty acid (SCFA), and the solid phase was used to determine the nutrient’s digestibility and microbial community. Results In vitro ileal digestibility of dry matter and gross energy was higher in starchy than fibrous feedstuffs. Total gas and SCFA production were significantly higher (P < 0.001) in starchy feedstuffs than fibrous feedstuffs. Both acetate and propionate production was significantly higher (P < 0.001) in all starchy feedstuffs than BBG and MNC; WMR was in between. Overall alpha diversity was not significantly different within and between starchy and fibrous feedstuffs. Beta diversity (measured using bray Curtis dissimilarity distance) of starchy feedstuffs was significantly different (P < 0.005) than fibrous feedstuffs. Conclusion Starchy feedstuffs acted as a substrate to similar types of microbes, whereas fibrous feedstuffs resulted in a more diverse microbial population. Such alternative feedstuffs may exert comparable beneficial effects, thus may be included in swine diets to improve gut health.