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Chemometric characterization of Slovenian red wines
Milena Ivanović, Anja Petek, Maša Islamčević Razboršek, Mitja Kolar, 2017, izvirni znanstveni članek

Opis: Total phenolic (TPC), flavonoid (TFC) and tannin (TTC) contents, total $SO_2$, total acids, pH, and reducing sugars were measured in twenty five Slovenian red wines from three key wine producing regions, Podravje, Posavje and Primorska. The results were chemometrically analysed and the wines were classified according to wine growing region and vine variety. Principal component analysis proved that TPC, TFC and TTC contents were primarily responsible for variation in the wines. Additionally, linear discriminant analysis (LDA) was performed and resulted in the satisfactory classification of samples by both vine variety and region.
Ključne besede: Slovenian red wines, quality parameters of wine, polyphenols, chemometric analysis
Objavljeno: 03.10.2017; Ogledov: 764; Prenosov: 287
.pdf Celotno besedilo (119,46 KB)
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POTENTIAL INDICATORS FOR Sustainability assessment of food production on the field level
Saša Štraus, 2012, doktorska disertacija

Opis: The issue of sustainable agriculture has attracted considerable attention. Sustainable agriculture encompasses economic viability, social acceptance, conservation of the environment, and food quality. The present thesis aims to evaluate the sustainability of conventional (CON), integrated (INT), and organic (ORG) production systems (PS). The assessment of sustainability of different PS was made in terms of the four most significant aspects of sustainability—agronomic, economic, environmental, and food quality—at the field level (i). Agronomic parameters such as the number of leaves, leaf area index, fruit characteristics, and seed/oil yield and economic feasibility were evaluated for oil seed pumpkin (ii). The environmental sustainability was assessed through the ecological footprint and weed biodiversity index (iii). The study of food quality determined the internal quality (total phenol, sugar, organic acid, vitamin C, mineral, and nitrate content and antioxidant activity) and sensory evaluation (iv, v). The sustainability of the PS for the four crops was assessed using a qualitative multi-attribute model (DEXi methodology (vi). Because field trial was conducted in protected landscapes (PL), the options for the development of PLs with the ORG PS were evaluated. To obtain the data, a field trial was conducted on a 4000 m2 area in the years 2008 to 2011. Wheat, oil seed pumpkin, red beet, and cabbage grown by the three different PSs—CON, INT, and ORG—and a control plot were studied. They were arranged in a randomized complete block split-plot design with four replications. The production systems differed in plant protection and fertilization strategies, as defined by legislation and standards. Survey of literature point out that indicator are the basis of assessing sustainability, the assessment of sustainability should encompass at least three pillars of sustainability (i). Agronomic parameters (ii) and economic feasibility were evaluated for oil seed pumpkin in the field trial. The leaf area index differed significantly between CON (4.8 for CON and 4.1 for ORG) and other production systems at later growth stages (BBCH = 600-700), and it was highly correlated with the yield (808 kg ha-1 for CON and 723 kg ha-1 for ORG). The yield and all agronomic parameters were significantly lower in ORG; however, the economic feasibility analysis showed that the financial results could be higher because of lower production costs (1.784 € ha-1 for CON and 1.434.5 € ha-1 for ORG) and higher product prices. The same economic feasibility analysis results were also obtained for cabbage and red beet (iii). The Biodiversity Ecological Footprint index (iii) were interpreted using the SPIonExcel tool and the Shannon-Weaver Diversity Index for the weeds species diversity. The ecological footprint of ORG was 3.3 times lower than that of CON (21 ha to 70 ha), and the Shannon-Weaver diversity index of ORG was significantly higher than that of CON (which was 20% higher, 0.66 for CON and 0.86 for ORG). The internal quality were studied for red beet and white cabbage. Sensory evaluation of sauerkraut samples was made. In the case of red beet, the differences were significant for vitamin C (23.3% higher for ORG than for CON), antioxidant activity (30.3% higher for ORG than for CON), and some microminerals (Na, Cu, Fe, Mn, and Zn) (iv). In the case of cabbage, a significantly lower amount of P and N and a significantly higher amount of Na, Mg, and total phenols (in ORG 0.360 GAE mg g-1 FW and in CON 0.310 GAE mg g-1 FW) was found for ORG than for CON cabbage. The concentration of nitrates is significantly lower in ORG (530 mg kg-1 for CON and 370.37 mg kg-1 for ORG). The sensory evaluation of sauerkraut samples was performed by 100 consumers using a nine-point hedonic scale. The ORG and control samples were evaluated significantly better than the INT and CON samples (overall acceptability was 5.94 for ORG and 5.34 for CON) (v). The core of the qualitative multi-model (DEXi methodology) is a hierarchical tree that divides
Ključne besede: Sustainable agriculture, agronomic parameters, environmental parameters, economic feasibility, food quality, DEX, protected landscapes
Objavljeno: 29.11.2012; Ogledov: 2354; Prenosov: 264
.pdf Celotno besedilo (1,79 MB)

Implementing hygiene monitoring systems in hospital laundries in order to reduce microbial contamination of hospital textiles
Sabina Fijan, Sonja Šostar-Turk, Avrelija Cencič, 2005, izvirni znanstveni članek

Opis: As textiles sent to hospital laundries contain many types of pathogenic organisms, it is important that laundering not only has an appropriate cleaning effect but also has a satisfactory disinfecting effect. Critical to this process is the maintenance of an appropriate hygiene level in the clean area of laundries in order to prevent recontamination of textiles from manual handling when ironing, folding, packing etc. The aims of this study were to evaluate the hygienic state of a hospital laundry, to introduce continuous sanitary measures, and to introduce a continuous hygiene monitoring system with an infection control programme. Two systems for evaluating hospital laundry hygiene were combined: HACCP principles (hazard analysis and critical control points) and RAL-GZ 992 standards (quality assurance standard for textile care of hospital laundry). Evaluation of the hygienic state of the hospital laundry was carried out by evaluating the number and types of micro-organisms present at the critical control points throughout the whole laundering process, using RODAC agar plates for surface sampling and the pour plate method for investigating water samples. The initial examination showed that the sanitary condition of the laundry did not reach the required hygiene level. Therefore, fundamental sanitation measures were instituted and the examination was repeated. Results were then satisfactory. The most important critical control point was the chemothermal laundering efficiency of the laundering process. To prevent micro-organisms spreading into the entire cleanworking area, it is important that, in addition to regular sanitary measures such as cleaning/disinfecting all working areas, technical equipment and storage shelves etc., regular education sessions for laundry employees on proper hand hygiene is undertaken and effective separation of the clean and dirty working areas is achieved.
Ključne besede: textile care, hospital laundry, laundry hygiene, micro-organisms, washing quality parameters, sanitary microbiological parameters, hospital-acquired disease prevention, sanitary measures
Objavljeno: 01.06.2012; Ogledov: 2360; Prenosov: 79
URL Povezava na celotno besedilo

Hygiene monitoring systems for hospital textile laundering
Sabina Fijan, Sonja Šostar-Turk, 2007, strokovni članek

Opis: The main aim of washing laundry is to remove soils and microorganisms from infected and dirty textiles and achieve clean, fresh and disinfected textiles ready for use. Textiles undergo laundering processes, which include: soil removal with special laundering agents; bleaching; disinfecting; and finally neutralising and rinsing. Because textiles from hospitals may contain many kinds of pathogenic -bacteria, fungi and viruses, it is essential that the laundering process has not only a cleaning effect but also an antimicrobial one. Since users of hospital textiles are often patients with a weakened immune -system, it is recommended that best practice and common sense be employed when washing and -disinfecting hospital textiles. Most people assume that the laundry returned to them is in fact clean and, therefore, safe. Experience encourages all infection control teams to take laundering very seriously. (1-15) Inappropriately disinfected textiles are one of the possible sources of nosocomial infections for patients. There are reports of hospital textiles being the source of nosocomial infection with streptococci, enterococci, Bacillus cereus, staphylococci and coliforms.(5-9) There are some documented cases where staff in hospital wards and laundries have been infected with scabies, fungi, salmonellas, gastroenteritis viruses, hepatitis A viruses and coxiellas after treating dirty laundry.
Ključne besede: textile care, hospital laundry, laundry hygiene, micro-organisms, washing quality parameters, sanitary microbiological parameters, hospital-acquired disease prevention, sanitary measures
Objavljeno: 31.05.2012; Ogledov: 2282; Prenosov: 26
URL Povezava na celotno besedilo

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