focalinterest.net

Tag: Nutrition & Diet

  • Amylose content is linked to rice starch structure and pasting behavior

    What the study found

    The study found that apparent amylose content, or AAC, was linked to multiple structural and physicochemical properties of rice starch. The relationships formed coordinated patterns rather than appearing as isolated single-variable effects.

    Why the authors say this matters

    The authors conclude that these patterns provide a scientific basis for selecting and using rice starches in food applications. They suggest that understanding amylose content together with structural features helps explain resistant starch formation and pasting behavior.

    What the researchers tested

    The researchers analyzed rice starches spanning a wide AAC range from 2.94% to 44.43%. They used principal component analysis, Pearson’s correlation analysis, and hierarchical cluster analysis on 16 variables covering physicochemical and structural properties.

    What worked and what didn't

    AAC showed positive correlations with resistant starch, final viscosity, setback viscosity, lipid content, blue value, and maximum absorption wavelength. Principal component analysis explained 65.5% of the total variance, and pasting temperature contributed minimally to the major components; hierarchical cluster analysis identified two dominant clusters, one centered on starch composition and retrogradation behavior and another on structural and pasting properties.

    What to keep in mind

    The abstract does not describe experimental limitations beyond the scope of the variables analyzed. The findings are based on statistical relationships within the studied rice starch samples and do not by themselves show causation.

    • Apparent amylose content ranged from 2.94% to 44.43% across the rice starches studied.
    • AAC was positively correlated with resistant starch, final viscosity, setback viscosity, lipid content, blue value, and maximum absorption wavelength.
    • Principal component analysis of 16 variables explained 65.5% of the total variance.
    • Hierarchical cluster analysis identified two main groups: one for composition and retrogradation behavior, and one for structural and pasting properties.
    • Pasting temperature contributed minimally to the major components in the analysis.

  • Thermal treatments changed black wheat flour properties and digestibility

    What the study found

    Thermal treatments altered whole-grain black wheat flour in several ways, and heat fluidization had the most pronounced overall effect. The study found changes in composition, structure, pasting behavior, and in vitro digestibility, along with increased resistant starch.

    Why the authors say this matters

    The authors conclude that thermal modifications, especially heat fluidization, are promising for improving the quality of whole-grain black wheat flour and for developing functional foods. In this context, functional foods are foods designed to provide benefits beyond basic nutrition.

    What the researchers tested

    The researchers compared untreated black wheat flour with flour or kernels processed by microwaving, roasting, and heat fluidization. They measured proximate composition, anthocyanin content, physical properties, microstructure, starch order and crystallinity, protein secondary structure, gelatinization, pasting viscosity, viscoelasticity, and in vitro digestibility.

    What worked and what didn't

    All thermal treatments caused kernel swelling, darker flour color, lower kernel hardness, and disruption of starch microstructure. They also reduced starch crystallinity and gelatinization enthalpy, disrupted protein secondary structure, and denatured and aggregated gluten. The treatments increased anthocyanin content, improved paste viscoelasticity, decreased starch digestibility and protein bioavailability, and increased resistant starch; heat fluidization showed the largest changes overall.

    What to keep in mind

    The abstract reports in vitro digestibility, so the results are based on laboratory testing rather than direct human digestion. It also does not describe any study limitations beyond the comparisons among the tested thermal treatments.

    • Microwaving, roasting, and heat fluidization all changed whole-grain black wheat flour properties.
    • Anthocyanin content increased after thermal treatment.
    • All treatments reduced starch crystallinity and changed starch structure.
    • Thermal treatments lowered starch digestibility and increased resistant starch.
    • Heat fluidization produced the strongest overall effect among the treatments.

  • Polish doctors’ dairy purchases were shaped by health, quality, and practical factors

    What the study found

    The study found that Polish doctors’ dairy product purchase decisions are shaped by diverse factors. The authors report that these decisions are guided not only by health and quality values, but also by practical considerations such as shelf life and availability in shops.

    Why the authors say this matters

    The authors say the study helps fill a research gap on what influences individual Polish doctors’ purchasing decisions in the dairy market. They also present research among doctors, a group they describe as highly trusted and scientifically trained, as an important contribution to discussion of purchasing behavior.

    What the researchers tested

    The researchers surveyed 201 doctors from across Poland, using computer-assisted personal interviewing, or CAPI. The sample was purposive with elements of proportional territorial allocation, and it included doctors from various medical specialties. They also used principal component factor analysis to identify hidden factors behind purchasing decisions and to define customer segments.

    What worked and what didn't

    The study confirmed the hypothesis that purchasing decisions in the dairy market are shaped by diverse factors. It also found gender differences for 6 of the 26 variables assessed, so one hypothesis was only partially confirmed. The factor analysis identified hidden factors for all respondents and for gender-based groups.

    What to keep in mind

    The abstract does not describe detailed limitations beyond the fact that the study used a purposive sample of 201 doctors in Poland. The findings are specific to Polish doctors and the dairy products market described in the study.

    • Polish doctors’ dairy purchases were influenced by both health/quality values and practical factors.
    • Practical factors mentioned in the abstract included shelf life and availability in shops.
    • Gender differences appeared for 6 of the 26 variables assessed.
    • The study used 201 interviews with doctors from across Poland.
    • Principal component factor analysis was used to identify hidden factors and customer segments.

  • Certain dietary patterns were associated with endometriosis risk

    What the study found

    The study found associations between some dominant food patterns and endometriosis in women aged 15 to 45. In particular, patterns high in processed meats, oils, and sugars were linked with higher odds of endometriosis.

    Why the authors say this matters

    The authors conclude that food patterns high in processed meats, oils, and sugars may increase the risk of endometriosis in women. Endometriosis is described in the abstract as a chronic inflammatory condition, meaning a long-lasting condition involving inflammation.

    What the researchers tested

    The researchers conducted a case-control study with 180 women, including 60 with endometriosis and 120 without it. Endometriosis was confirmed by ultrasound or laparoscopy, and diet was assessed with a 146-item food frequency questionnaire. They used factor analysis to identify dietary patterns and logistic regression, along with other statistical tests, to examine associations while adjusting for factors such as BMI, menstrual cycle characteristics, physical activity, and education.

    What worked and what didn't

    Three dominant dietary patterns were identified: one high in red meat, solid oils, high-fat snacks, and processed foods; one featuring vegetables, grains, and coffee; and one including sugar, cereals, and jam. Pattern one and pattern three were significantly associated with increased risk of endometriosis, while pattern two was not reported as significantly associated. Higher energy, lipid, and carbohydrate intake were also significantly associated with endometriosis.

    What to keep in mind

    This was an observational case-control study, so it can show associations but not prove cause and effect. The abstract does not describe limitations beyond the study design, and the reported confidence interval for one odds ratio appears inconsistent in the abstract as provided.

    • The study examined 180 women aged 15 to 45, including 60 with endometriosis and 120 controls.
    • Three dietary patterns were identified from a 146-item food frequency questionnaire.
    • A pattern high in red meat, solid oils, high-fat snacks, and processed foods was associated with higher endometriosis risk.
    • A pattern including sugar, cereals, and jam was also associated with higher endometriosis risk.
    • Higher intake of energy, lipids, and carbohydrates was significantly associated with endometriosis.