Browse

141 - 150 of 635 items :

  • General Mathematics x
  • General Interest x
Clear All
Glycaemic Profile and Insulin Response after Consuming Triticale Flakes

Abstract

Daily intake of cereal fibre reduces incidence and progression of metabolic diseases. Very little is known on how triticale (Triticosecale) influences human health and its role in regulating carbohydrate metabolism. The aim of the study was to investigate glycaemic and insulin response in blood after consuming whole grain triticale cereal flakes. A group of twelve healthy, young people, aged from 18 to 30 years participated in the test. The participants in fasted state were given equivalent carbohydrate amounts of triticale cereal and reference food (glucose solution). Postprandial blood glucose and plasma insulin concentrations were measured according to Brouns et al. (2005). Whole grain triticale cereal flakes elicited lower metabolic responses compared to glucose solution. Intake of the triticale cereal flakes induced significantly lower incremental insulin area (iAUC 0–120 min) 1672.9 ± 619.85 than glucose solution 2646.65 ± 1260.56 and showed lower insulinemic indices (II) 68 ± 19.0 (p < 0.05). A low insulin incremental peak was associated with less severe late post-prandial hypoglycaemia. Our study showed that triticale cereal product caused low acute insulinemic response and improved glycaemic profiles, similarly to the rye products studied before. The results also suggested that the triticale cereal flakes could have beneficial appetite regulating properties. Thus, triticale flakes would be a wonderful option for functional breakfast cereal mixtures that might influence course of metabolic syndrome prevention

Open access
Herbal Extracts for Ensuring Pork Meat Quality during Cold Storage

Abstract

Oxidation and microbial spoilage have a negative effect on the quality of meat and meat products, causing changes in their sensory and nutritional properties. Herbs contain biologically active compounds, like phenols with antioxidative and antimicrobial properties. Phenols can be used as substitutes for commercial antioxidants to prevent lipid oxidation, thus maintaining the colour and flavour of the product. The aim of the study was to investigate the the potential use of herbal extracts in ethanol/water application for the maintenance of pork meat quality during storage. Four herbs growing in Latvia — nettle (Urtica dioica L.), lovage (Levisticum officinale L.), oregano (Origanum vulgare), and horseradish (Armoracia rusticana L.) were chosen for the study. An optimal ethanol concentration for the extraction of the phenolic compounds was obtained with ethanol 50%/water 50% concentration (v/v). Prepared herbal extracts were added to chilled pork to determine the quality of the pork during storage. Changes in meat quality and its sensory properties for chilled pork without extracts appeared on day 18 of storage. Negative changes in sensory properties of meat samples with nettle extract were observed on day 22 of storage, and with lovage, oregano, and horseradish extracts on day 32. Statistically significant differences (p ≤ 0.05) were observed for microbiological indices between pork samples with herbal extracts and the control sample.

Open access
Influence of Horseradish Amorica rusticana L. and Lovage Levisticum officinale L. Extracts on the Stability of Rapeseed Oil

Abstract

In this study the efficiency of horseradish Amorica rusticana leaf, and Levisticum officinale lovage leaf and stem extracts for the stabilisation of rapeseed oil during storage was evaluated. Plant extracts were added to unrefined rapeseed oil in a concentration of 1% by weight, which was chosen based on the results of previous experiments studying the possibilities of the addition of different concentrations of plant extracts for extending the shelf life of the oil. As a control a rapeseed oil sample without extracts was analysed, and for comparison butylated hydroxytoluene (BHT) in the maximum allowed concentration was added to the oil. The efficiency of the extracts in oil was tested in the dark and in the light/dark cycles (day/night regime). For all samples the peroxide value, acid value and DPPH scavenging activity were determined. The oil samples with the added plant extracts stored in the dark oxidised significantly (p < 0.05) slower than the control sample and the sample with BHT. After 24 weeks of storage, the lowest peroxide value was in the sample with the lovage stem extract. The extracts contain compounds that could absorb light (for example chlorophyll) and in the light/dark conditions accelerate oxidation in oil. Among the analysed extracts the lovage stem extract was the most effective oil oxidation inhibitor, but horseradish leaf extract was the most effective DPPH radical scavenger.

Open access
Influence of Sous vide Treatment and High Pressure Processing on Nutritional Value and Overall Acceptance of Pulse Spreads

Abstract

The study was carried out to investigate the influence of sous vide treatment (80 °C/15 min) and high pressure processing (700 MPa/10 min/20 °C) on nutritional characteristics of cowpea (Vigna unguiculata (L.) Walp. cv. Fradel) and maple pea (Pisum sativum var. arvense L. cv. Bruno) spreads after processing and 62-day storage at 5 ± 1 °C temperature, to evaluate overall acceptance of processed pulse spreads after 22-day storage and to analyse nutrient coverage of pulse spreads compared to reference intake for adolescents and adults. Pulse spreads were made of cooked pulse seeds to which salt, citric acid, oil, and seasoning was added. Pulse spreads were hermetically sealed under vacuum in PA/PE and PET/ALU/PA/PP pouches. Nutritional composition was determined according to standard methods; overall acceptance was determined using a 5-point hedonic scale. Nutrient coverage by one serving of pulse spreads for adolescents and adults was compared to nutrient recommendations given by the Ministry of Health of the Republic of Latvia. The results suggest that processing technologies and packaging materials did not influence nutritional value of pulse spreads (p > 0.1). Hedonic evaluation by consumers (n = 90) showed that processing technologies did not influence the overall acceptance of cowpea and maple pea spreads (p > 0.1).

Open access
Iodine Deficiency in Latvia: Current Status and Need for National Recommendations

Abstract

In the absence of a mandatory salt iodisation programme, two nationwide cross-sectional cluster surveys revealed persisting iodine deficiency among Latvian schoolchildren during the spring season and a noteworthy iodine deficiency in pregnant women in Latvia; these deficiencies warrant intervention. The consequences of mild-to-moderate iodine deficiency during pregnancy and lactation can adversely affect foetal brain development. Data from a Latvian population survey revealed the consumption of approximately 100 μg of iodine per day through foods and iodised salt. Therefore, strategies to increase the consumption of iodine-containing products should be implemented, particularly for children. In addition, to meet the increased iodine requirement during pregnancy, pregnant women should take daily supplements containing 150 μg iodine from the earliest time possible. All women of childbearing age should be advised to increase their dietary iodine intake by using iodised table salt and iodine-rich products: seafood, milk and milk products. For women with pre-existing thyroid pathologies, the medical decision should be considered on a case-by-case basis. Urinary iodine concentration monitoring among schoolchildren and pregnant women and neonatal thyrotropin registry analysis every five years would be an appropriate strategy for maintaining iodine intake within the interval that prevents iodine deficiency disorders.

Open access
Knowledge of the Importance of Iodine in Nutrition among Adults in Latvia

Abstract

The Food and Agriculture Organisation of the United Nations (FAO) states that it is essential for people to understand what constitutes a healthy diet and to know how to use their resources in the most effective way. Iodine is an essential nutrient for mammals, required as a mandatory structural and functional element of thyroid hormones. Previous studies in Latvia highlighted a tendency of reduced level of iodine for newborns, school-age children and pregnant women. No studies in the general adult population had been conducted yet. The aim of the study was to evaluate the level of knowledge regarding the role of iodine in nutrition in the adult population of Latvia. In total 199 adults participated in the survey. Data on the knowledge about the occurrence of iodine in nature and foodstuffs, the role of iodine in nutrition, and its deficiency were obtained. Results of the survey showed that only 4.5% of respondents used iodised salt daily in the diet. One-fourth knew that iodine is widely found in the environment and more than one-third knew all of the main functions of iodine in the human body. Salt and sea food were mentioned as the most common iodine sources. While iodised salt is used rarely, public awareness about the role of iodine is good and potential iodine deficiency in Latvia is likely due to unbalanced diet rather than lack of knowledge.

Open access
Latvian Citizens’ Knowledge about Dietary Fibre

Abstract

The positive benefits of dietary fibre (DF) include regulation of the intestinal transit, prevention of risk or treatment of diabetes, and prevention of cardiovascular diseases, colon cancer, and obesity. The aim of this study was to collect information on knowledge about dietary fibre of citizens of Latvia. The questionnaire consisted of 22 questions. Its aim was to evaluate knowledge in three distinct areas: six concerning knowledge about food fibres; six — about the relation between fibres and various foods, and ten about the relation between fibres and diseases. The methodological study was conducted involving 231 participants, of which 83.5% were female and 16.5% male, aged between 18 and 80 years. The respondents were selected by convenience, and they differed in age, literacy, gender, geographical area of residence, and included people from different cities and smaller villages. 67% of the respondents considered that consumption of sufficient amounts of fibres can prevent or treat different diseases. 85% of respondents noted that legumes (peas, beans) are a source of fibres, but that it was more possible to take up the fibre with a combination of vegetables and animal products. The questionnaire revealed that respondents are aware of the benefits of fibre consumption for promoting health and treating some diseases.

Open access
Meat and Meat Product Consumption among Infants in Latvia

Abstract

Meat consumption during the first year of life is especially important to provide necessary iron requirements. The aim of the study was to assess meat and meat product consumption of Latvian infants during their first year of life, in relation to different factors. Data were collected by interview method using two types of questionnaires: food frequency questionnaires and food diary. The study included a representative sample of infants and toddlers from all regions of Latvia with a target sample of 560 participants. The study included 266 infants: 127 girls, 139 boys, aged from 0 to 12 month. Data were summarised using the Excel software and analysed using the SPSS software. For data analysis two age groups were created: 0–5.9 months and 6–12 months. Consumption was analysed by two parameters: frequency and amount per feeding. Meat products were defined as offal products, sausages, and meat in baby food. Meat was mainly consumed after 6 months of age and by 73% of infants (n = 107). Meat from baby food was consumed only after 6 months and by 23% (n = 34). Sausages and offal products were consumed after 6 months of age. Sausages were consumed by 18% (n = 28) and offal products by 11% (n = 16) of infants. Meat consumption for the majority of infants was introduced after 6 months and was in accordance with recommendations.

Open access
Microorganisms of Grape Berries

Abstract

Grape surface is an unstable habitat that changes greatly according to the stage of grape ripening. Different bacteria and yeasts can colonise the surface of grape berry and the diversity of microorganisms depends on the stage of ripening, pesticide application and health condition. The aim of this study was to study the microflora of the surface of grape berries. Altogether, 19 grape samples from Slovakia were collected. The spread plate method was applied and a 100 μL inoculum of each dilution (10−2, 10−3) was plated on TSA, MEA, and MRS agar for isolation of microorganisms from grapes. Proteins were extracted from cells by ethanol/formic acid extraction procedure. MALDI-TOF Mass Spectrometry was used for identification of microorganisms. In total, 11 genera of Gram-negative bacteria, 11 of Gram-positive bacteria and nine of yeasts were identified. Among 200 isolates, Gram-negative, Gram-positive bacteria and yeasts represented 11%, 27% and 62% of the total number of isolates studied. The most common genera of isolated yeasts were Hanseniaspora (37%), Metschnikowia (31%), and Rhodotorula (10%). The most frequently isolated among Gram-negative bacteria were Acinetobacter (22%), Pseudomonas (22%) and Sphingomonas (13%). The most common genera of Gram-positive bacteria were Bacillus (20%), Lactobacillus (19%), Leuconostoc and Staphylococcus (11%), respectively.

Open access
Milk as an Essential Source of Iodine in Latvian Population

Abstract

Milk and dairy products are studied as alternative iodine sources, because salt iodisation is controversial due to high salt consumption leading to cardiovascular diseases. However, the iodine concentration in milk markedly varies. This study evaluated the iodine concentration in cow’s milk available in the Latvian market. Iodine and fat concentration was analysed with a spectrophotometer “Varian Cary 50” based ISO 2446:2008 in 20 milk samples. Data from the Central Statistical Bureau and survey among pregnant women were used to analyse milk product consumption and its impact on iodine status. Average iodine concentration in milk samples was 457.6 (179.6) μg/L, winter samples had a higher concentration of iodine than summer samples: 563.4 (329.6) μg/L and 469.2 (162.0) μg/L, but this is not statistically significant p < 0.05. Iodine concentration in skimmed milk was 490 μg/L, milk with the reduced fat content 501.7 (174.8) μg/L, and whole milk — 422.6 (192.1)1 μg/L. Milk consumption decreased from 2002 to 2014, while yogurt and cheese consumption increased. Higher consumption of milk and milk products was related to higher urinary iodine concentration ρ = 0.115; p = 0.003. Milk and milk products are an important iodine source in Latvia and their consumption should be promoted.

Open access