Homonimia międzyjęzykowa jako problem glottodydaktyczny w nauczaniu języka polskiego na Uniwersytecie w Belgradzie

Zadanie pt. Digitalizacja i udostępnienie w Cyfrowym Repozytorium Uniwersytetu Łódzkiego kolekcji czasopism naukowych wydawanych przez Uniwersytet Łódzki nr 885/P-DUN/2014 zostało dofinansowane ze środków MNiSW w ramach działalności upowszechniającej naukę

Биосорпција јона никла на тканинама од јуте: кинетичка и изотермска испитивања

Raw jute fabric was chemically modified with 1 % NaOH for 30 min, 17.5 % NaOH for 5 min or with 0.7 % NaClO2 for 30 and 60 min to study the influence of changes in the chemical composition of the fabrics and quantity of carboxyl groups on the biosorption capacity of the fabrics for nickel ions. The effects of contact time and initial concentration of nickel ions on the biosorp- tion capacity of the fabrics were also investigated. The obtained results rev- ealed that the biosorption of nickel ions can be explained by the pseudo-sec- ond-order kinetic model, while the experimental isotherm data fit better with the Langmuir model. The calculated ratios between maximal biosorption cap- acity (6.30–12.06 mg g-1) of the jute fabrics and carboxyl group quantity indi- cated that approximately half of the carboxyl groups of the fabrics’ would be involved in binding nickel ions during biosorption. Therefore, the quantity of carboxyl groups can be used to predict the maximal biosorption capacity of jute fabrics toward nickel ions. In the case of oxidized jute fabrics, the lignin rem- oval, and consequently increased content of cellulose and hemicelluloses, also contributed to a higher biosorption capacity.Сирова тканина од јуте је хемијски модификована 1 % NaOH у току 30 min, 17,5 % NaOH у току 5 min или 0,7 % NaClO2 у току 30 и 60 min у циљу испитивања утицаја промена хемијског састава и садржаја карбоксилних група на биосорпциони капацитет тканина према јонима никла. Такође, испитиван је и утицај времена контакта тканина са раствором NiSO4 и почетне концентрације раствора никла на биосорпциони капацитет тканина од јуте. Добијени резултати указују на то да се процес биосорпције никла може описати кинетичким моделом псеудо-другог реда, а равнотежне вредности добијене за сорпцију никла се боље слажу са Langmuir адсорпционом изотермом. Израчунати однос између максималних биосорпционих капацитета тканина од јуте (6,30–12,06 mg g-1) и садржаја карбоксилних група указују на то да ће приближно половина карбоксилних група учествовати у везивању јона никла током биосорпције. Према томе, садржај карбоксилних група се може користити као индикатор максималног биосорпционог капацитета тканина од јуте према јонима никла. Код оксидисане тканине, уклањање лигнина које је праћено са повећањем садржаја целулозе и хемицелулоза је такође допринело већем биосорпционом капацитету

Mineral content of bee pollen from Serbia

In this study we analysed mineral composition of bee pollen of different plant origin collected across Serbia using inductively coupled plasma - optical emission spectrometry. The most abundant elements were potassium, calcium, and magnesium. The samples were also exceptionally rich in iron and zinc, which are very important as nutrients. Judging by our findings, mineral composition of bee pollen much more depends on the type of pollen-producing plant than on its geographical origin

Health Benefits and Applications of Goji Berries in Functional Food Products Development: A Review

Goji berries have long been used for their nutritional value and medicinal purposes in Asian countries. In the last two decades, goji berries have become popular around the world and are consumed as a functional food due to wide-range bioactive compounds with health-promoting properties. In addition, they are gaining increased research attention as a source of functional ingredients with potential industrial applications. This review focuses on the antioxidant properties of goji berries, scientific evidence on their health effects based on human interventional studies, safety concerns, goji berry processing technologies, and applications of goji berry-based ingredients in developing functional food products

Funkcija štitaste žlezde i prisustvo antitireoidnih autoantitela kod bolesnika sa sistemskim bolestima vezivnog tkiva

Autoimmune thyroid disease (ATD) has been described in patients with connective tissue diseases (CTD). The aim of this study was to estimate and compare the prevalence of ATD in a group of 91 CTD patients, and in their subgroups: 53 systemic lupus erythematosus (SLE), 24 rheumatoid arthritis (RA), 7 primary Sjogren’s syndrome (SSy) and 7 progressive systemic sclerosis (SSc) patients. A control group of 34 healthy blood volunteers was used for comparison. Serum levels of free thyroxine (FT4), thyroid stimulating hormone (TSH), as well as thyroid autoantibodies (Abs) specific of thyroperoxidase (TPO) and thyroglobulin (TG) were examined. CTD patients, in general, as well as SLE and RA subgroups, had significantly higher number of thyroid dysfunction than the control group (p lt 0.05). The most prominent thyroid dysfunction was subclinical hypothyroidism, with a higher prevalence in all subgroups of patients when compared to the control. Anti-TPO Abs were detected in a significant number of CTD patients, especially in SLE subgroup when compared to the control group. It was also found that a higher number of CTD patients, SLE and RA subgroups, had positive anti-Tg Abs, when compared to the control subjects. In conclusion, the prevalence of ATD in CTD patients was more frequent than in the control group. The patients with anti-TPO Abs and anti-Tg Abs at the time when they were analyzed, had hyperthyroidism, hypothyroidism or were clinically and biochemically euthyroid. The prevalence of hypothyroidism was greater than the prevalence of hyperthyroidism in all subgroups of patients.Autoimunske bolesti štitaste žlezde (AITD) opisane su kod bolesnika sa sistemskim bolestima vezivnog tkiva (SBVT). Cilj ovog rada bio je da se ispita prevalencija AITD u grupi od 91 bolesnika sa SBVT, koja je uključila 53 bolesnika sa sistemskim eritemskim lupusom (SLE), 24 obolelih sa reumatoidnim artritisom (RA) i po 7 obolelih od primarnog Sjogrenovog sindroma (SSy) i progresivne sistemske skleroze (SSc). Kontrolnu grupu ispitanika činila su 34 dobrovoljna davaoca krvi. Kod svih učesnika u studiji merene su serumske koncentracije slobodnog tiroksina (FT4), tireostimulišućeg hormona (TSH), kao i autoantitela specifičnih za tireoperoksidazu (anti-TPO At) i tireoglobulin (anti-Tg At). U grupi bolesnika sa SBVT, kao i u podgrupama obolelih od SLE i RA, nađena je statistički značajno veća učestalost poremećaja funkcije štitaste žlezde u odnosu na kontrolnu grupu (p lt 0.05), a od svih poremećaja funkcije štitaste žlezde najčečće je detektovana subklinička hipotireoza. Anti-TPO At nađena su kod značajno većeg broja bolesnika sa SBVT i SLE, u odnosu na kontrolnu grupu. Isto tako, i anti-Tg At su detektovana kod većeg broja ispitanika u grupi SBVT, i podgrupama SLE i RA, nego kod zdravih osoba. U zaključku, prevalencija AITD kod obolelih od SBVT veća je nego u kontrolnoj grupi. Bolesnici sa anti- TPO At i anti-Tg At u vreme kada su analizirani, imali su subkliničku ili klinički manifestnu hipotireozu ili hipertireozu, ili su još bili u stadijumu bolesti u kome se ne može detektovati poremećaj funkcije štitaste žlezde. Prevalencija hipotireoze bila je veća od prevalencije hipertireoze u svim podgrupama bolesnika sa SBVT

Unnecessary prescribing of antibiotics to healthy/asymptomatic school-age carriers of potentially pathogenic bacteria

Objectives: To re-draw attention to the unnecessary prescribing of antibiotics. ----- Methods: We monitored nasopharyngeal colonization by 3 potentially pathogenic bacteria, Streptococcus pyogenes, Streptococcus pneumoniae, and Haemophilus influenzae type b in 81 children between the ages of 6 and 7 years who attended the same primary school. The children's health status was also monitored, without using antimicrobial treatment for healthy/asymptomatic carriers. Nasopharyngeal swabs were collected on 6 occasions during autumn months, from mid-September to mid-December 2016. The children who fell ill during the study were treated at the Ear, Nose and Throat Clinic, Sisters of Mercy University Hospital Center, Zagreb, Croatia. ----- Results: Four hundred and sixty-three nasopharyngeal swabs were collected. Each child had at least one positive swab result. Bacterial colonization with Streptococcus pyogenes had the highest colonization rate. During the study, 83% of the children were healthy/asymptomatic carriers with no clinical signs of disease, while 17% became ill. The statistical results showed that the increase in all examined bacteria was statistically significant. ----- Conclusions: Our study results showed that positive bacterial findings in nasopharyngeal swabs from clinically healthy carriers were not an indication for antibiotic therapy

Obtaining colored antioxidant cotton and cotton/linen fabrics using green tea aqueous extract

Green tea aqueous extract was prepared and characterized regarding total flavonoids and total phenolic contents as well as antioxidant activity (assessed by ABTS method). The characterized aqueous extract was used for dyeing and functionalization of 100% cotton and cotton/linen (47%/53% and 70%/30%) fabrics. Fabric color strength (K/S) values and their antioxidant activities before and after washing were compared. The obtained results revealed that 100% cotton (GTI), 47%/53% cotton/linen (GTII), and 70%/30% cotton/linen (GTIII) fabrics have K/S values ranging between 8.33 and 10.85. After one washing cycle, these values decreased significantly. On the other hand, dyed fabrics showed excellent (100 %) ABTS radical scavenging ability which remained excellent (GTII) or decreased to medium (GTI and GTIII) levels after one washing cycle. Based on the obtained results, it can be concluded that 47%/53% cotton/linen fabric is the most suitable for functional clothing capable of trapping the free radial of oxygen species. The current paper represents a step towards a more sustainable textile industry that could undoubtedly contribute to overcoming the environmental problems caused by the textile industry

Fatty acid profiles and mineral content of Serbian traditional white brined cheeses

This study deals with fatty acid profiles and mineral contents of traditional Serbian white cheeses in brine. Study covered four Serbian traditional white brined cheeses: Zlatar cheese, Sjenica cheese, Svrljig cheese and Homolje cheese prepared from raw cow and ovine milk. Fatty acid profiles of traditional cheeses were qualitatively and quantitatively different. The content of saturated fatty acids was in the range of 65.97 %-76.61 % (cow cheeses) and 69.68 %-74.52 % (ovine cheeses). Unsaturated fatty acids range of cow and ovine cheeses was 23.39 %-34.03 % and 25.48 %-30.08 %, respectively. Depending on the type of cheese, the ratio of polyunsaturated fatty acids was 1.66 %-11.03 %. The lowest content of saturated fatty acids was observed in Sjenica cow cheeses. Thus, this type of traditional cheeses had the most favorable health indices including atherogenicity index (1.89), thrombogenicity index (1.37) and desirable fatty acid ratio (46.34 %). Mineral content of traditional cheeses was also different. The ratio Ca:P was in the range of 0.70-1.33. The highest level of Ca, P, K, Mg, Zn, Cu and Cr was detected in Sjenica cheeses prepared from cow milk. The absence of Cd was observed in all cheeses