How do Different Types of Emulsifiers/Stabilizers Affect the In Vitro Intestinal Digestion of O/W Emulsions?

This study analyzes the influence of different types of molecules (tween, lecithin, xanthan gum, and methylcellulose) on the physical properties (flow behavior and particle size) and microstructure of oil-in-water (o/w) emulsions before and during in vitro intestinal digestion. The release of free fatty acids during a simulated intestinal stage has also been examined. The results show that various o/w emulsions present different rates and extents of lipolysis and that these differences are not primarily due to their rheological properties nor to the droplet size/surface area available for the action of lipase. Rather, the observed differences in the kinetics of lipolysis are most likely attributable to the nature and location of each type of molecule in their respective o/w emulsions as well as to their interactions with intestinal components. These results shed light on the mechanisms by which the interfacial layer controls lipid digestion, paving the way for a practical application of some of these emulsions in the production of foods used for regulating dietary lipid digestion in order to prevent and treat obesity and related disorders.

     

Concurrent Validation of the OMNI-Resistance Exercise Scale of Perceived Exertion With Thera-Band Resistance Bands

ABSTRACT: Colado JC, Garcia-Masso X, Triplett TN, Flandez J, Borreani S, Tella V. Concurrent validation of the OMNI-Resistance Exercise Scale of perceived exertion with Thera-Band resistance bands. J Strength Cond Res 26(11): 3018-3024, 2012-The concurrent validity of the OMNI-Resistance Exercise Scale (OMNI-RES) of perceived exertion for use with elastic bands was studied during isotonic resistance exercises. Twenty healthy, physically active subjects completed both familiarization and testing sessions. The criterion variables were myoelectric activity, recorded by electromyography, and heart rate, recorded by a heart rate monitor. The subjects performed 2 separate sets of 15 repetitions in each of the 2 testing sessions and for each of the exercises applied (i.e., frontal and lateral raises). One set was carried out with the separation between the hands gripping the elastic band allowing that 15 repetition maximum to be performed in the selected exercise, whereas the other set was carried out with the separation between hands at +50% of the previous grip. The perceived exertion rating for the active muscles and for the overall body, muscular activity, and heart rate were measured during the final repetition of each set. The results showed significant differences (p ≤ 0.001) in myoelectric activity, heart rate, and OMNI-RES scores between the low- and high-intensity sets and the intraclass correlation coefficient was 0.72-0.76. So it can be concluded that the OMNI-RES can be used for monitoring the intensity of exercises when elastic bands are used. This would allow the training stimulus dosage to be precisely controlled in both the session in progress and between different sessions, and allowing to differentiate between different levels of intensity according to the physical aptitudes and special physiological needs of the subjects.     

Clostridia spore formation during aerobic deterioration of maize and sorghum silages as influenced by Lactobacillus buchneri and Lactobacillus plantarum inoculants

Aims:  The effect of the inoculation of maize and sorghum silages with Lactobacillus plantarum (LP) and Lactobacillus buchneri (LB) on the clostridia spore formation during aerobic deterioration has been studied.
Methods and results:  The crops were ensiled in 30 l jars, without a lactic acid bacteria inoculant (C), and with an LP or LB inocula (theoretical rate of 1 × 10⁶). After 90 days of conservation, the silages were analysed for the chemical and microbiological characteristics and subjected to an aerobic stability test, during which pH, temperature, nitrate, yeast, mould and clostridia spores were measured. Compared to the C and LP silages, yeasts were reduced in the LB silages, resulting in an increased aerobic stability. Clostridia spores, determined by most probable number (MPN) procedure, increased to 6 log₁₀ MPN g⁻¹ in the C and LP maize silages, whereas they reached 3 log₁₀ MPN g⁻¹ in C and LP sorghum silages.
Conclusions:  Clostridia spore count only slightly increased in the LB maize silages after 342 h (2·59 log₁₀ MPN g⁻¹), whereas it did not show any increase in the LB sorghum silages for the whole period of air exposure.
Significance and impact of the study:  The data indicated that clostridia spore outgrowth can take place during silo feedout in aerobic-deteriorated silages and that LB inoculation reduces the risk of clostridia outgrowth after silage opening by increasing the aerobic stability.     

Informing the debate on oral health care for older people: a qualitative study of older people’s views on oral health and oral health care

doi: 10.1111/j.1741‐2358.2009.00274.x
Informing the debate on oral health care for older people: a qualitative study of older people’s views on oral health and oral health care Background: Older people represent a growing and diverse section of the population. As age increases, people are more likely to experience health and mobility problems and be at higher risk of developing oral disease. Nevertheless, few older people utilise primary oral healthcare services. It is therefore important to understand the value older people place on oral health and dental services to inform providers and planners of oral health care. This research was conducted as part of a study to identify potential ways of minimising barriers to oral health care in older people. Objectives: To explore perceptions of oral health and oral healthcare services amongst older people living in a socially deprived inner city area and how these are related to service utilisation. Methods: A qualitative approach was utilised to explore the range of issues related to older people’s perceptions of oral health and their views on health care. This involved a combination of focus groups and semi‐structured individual interviews with older people and their carers. Data analysis was conducted using the Framework approach. Results:

• ? Response: Thirty‐nine older people and/or their carers participated in focus groups.
• ? Oral health perception: Oral health was associated with the presence of natural teeth, the absence of pain, practical/social functioning, preferably supported by positive assessment by a dentist.
• ? Oral health life‐course: Older people have a long and complex dental history. Past negative experiences with oral health care, especially in childhood, strongly influenced present attitudes towards dentistry and dental personnel.
• ? Citizenship and right to health care: There was a strong perception that, as ‘British citizens’, older people should have a right to free health care and that the National Health Service (NHS) should support them in this phase of their life.

Conclusions: The oral health life‐course of older people is an important influence on their perceptions of oral health and dental attendance. They consider oral health of importance and place great emphasis on their citizenship and rights of access to state funded oral health care. This raises important issues for the funding and delivery of NHS oral health care for older people.     

Digestibility and Bioaccessibility of Pickering Emulsions of Roasted Coffee Oil Stabilized by Chitosan and Chitosan-Sodium Tripolyphosphate Nanoparticles

Food Biophysics - Due to the valuable lipid fraction composition present in roasted coffee oil, it has become important to develop methods that modify its structure, such as emulsion-based...     

Screening for suicidal thoughts in primary care: the views of patients and general practitioners

Background It has been argued that primary care practitioners have an important part to play in the prevention of suicide. However, levels of assessment of risk of suicide among patients treated in this setting are generally low.Methods Cross-sectional survey of general practitioners (GPs) and people being treated in primary care who had signs of depression. The study combined open and closed questions on attitudes to screening or being screened for suicidal ideation.Results One hundred and one of 132 patients took part in the survey and 103 of 300 GPs completed a questionnaire. A majority of both GPs and patients stated that people should be screened for suicidal ideation. However, an important minority of patients and GPs stated that asking or being asked such questions made them feel uncomfortable. Less than half of GPs had received formal training on the assessment of suicide risk. GPs told the researchers that barriers to screening included time pressures, culture and language, and concerns about the impact that screening could have on people's mental health. One-quarter of GPs and one-fifth of patients supported the notion that screening for suicidal ideation could induce a person to have thoughts of self-harm.Conclusions GPs and family doctors should screen for suicidal risk among depressed patients and should receive training on how to do this as part of their general training in the assessment and management of mental disorders. Research should be conducted to examine what, if any, effect screening for suicidal ideation has on mental health.