Wyniki wyszukiwania - Biblioteka Nauki

1

Determination of unifloral honey volatiles from Centaurea iberica and Zizyphus spinachristi by solid-phase microextraction and gas chromatography-mass spectrometry

100%

Odeh I. , Abu-Lafi S. , Al-Najjar I.

Acta Chromatographica

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2014

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tom Vol. 26, no. 3

485--493

EN

The volatiles of two different unifloral Palestinian honeys from botanical species Centaurea iberica and Zizyphus spina-christi have been investigated for the first time. They were isolated, identified, and quantitatively analyzed using Headspace Solid-Phase Microextraction and Gas Chromatography Mass Spectrometry (HS-SPME-GCMS) methodology. The resulted total ion current (TIC) chromatographic profiles reflected the uniqueness of each type of honey and therefore the proposed procedure can be used to characterize each kind of honey by revealing the absence or presence of certain volatile constituents.A total of 18 compounds were seen in Centaurea iberica honey with phenylacetaldehyde, phenylethylalcohol, 2-ethyl hexanoic acid, 2,4,6-trimethylphenol and nonanoic acid as the principal components, whereas 25 compounds were seen in Zizyphus spinachristi honey with benzaldehyde, phenylacetaldehyde, phenylethylalcohol, benzeneacetonitrile, 2-ethyl hexanoic acid, octanoic acid, 2-methoxy-4-(1-propanol)-6-acetate phenol, nonanoic acid, decanoic acid, 1-hydroxy 2,4,6-trimethylbenzene, and 5-hydroxymethyl-2-furaldehyde as the principal constituents.Ziziphus spina-christi honey was found to have two unequivocal potential markers: phenylacetonitrile and 5-hydroxymethyl-2-furancarboxaldehyde, while Centaurea Italica honey has only one representative floral origin marker compound: the 2,4,6-trimethylphenol.

2

Charakterystyki mocy przy mieszaniu krupca miodowego mieszadłem łapowym

100%

Bakier S.

Zeszyty Naukowe Politechniki Białostockiej. Budowa i Eksploatacja Maszyn

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2002

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tom Z. 9

19--27

PL

W pracy przedstawiono charakterystyki mocy przy mieszaniu krupca miodowego mieszadłem łapowym. Ponieważ badane medium jest płynem tiksotropowym liczbę mocy Ne przedstawiono w funkcji częstości obrotowej mieszadła. W efekcie uzyskano obszary zmian Ne ograniczony od góry i od dołu krzywymi, które uzyskano w wyniku aproksymacji wyników badań. Określono też przedział zmienności liczby Reynoldsa dla mieszania.

EN

The paper presents results of research work characteristic of power in mixing of crystallized honey with paddle. Because the mixing medium is of thixotropic fluids number power presents in function n[s-1]. In the research work the influence of the width of the paddle on both the mixing power and the change of the rheological properties of the product was investigated. The optimum geometry for the paddle impeller was chosen by analyzing the demand for power and simultaneous considering the changes of the rheological properties of the medium.

3

Pyrrolizidine alkaloids in honey from Switzerland

100%

Kast C. , Kilchenmann V. , Dubecke A. , Gallmann P. , Beckh G. , Lullmann C.

Polish Journal of Food and Nutrition Sciences

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2011

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tom 61

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nr Suppl.1

4

Water activity and colour parameters changes during storage of linden and buckwheat honeys

100%

Wilczyńska A. , Ruszkowska M.

Zeszyty Naukowe Akademii Morskiej w Gdyni

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2014

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tom nr 84

174--181

EN

The aim of the study was to evaluate selected quality parameters of honey: water activity and colour parameters and their changes during storage under different conditions. Also the effect of the botanical origin of honey and filtration process on these parameters were examined. In both types of honey, filtered and unfiltered, the initial water content was determined by refractometry, initial water activity was determined by the AquaLab and colour parameters L* a* b* were measured using a colorimeter Chroma Meter CR 400. In addition, a measurement of water activity of the tested honeys stored for 90 days under a constant relative humidity in the range of 0,069-0,932 water activity was done. Analysis of the examined water activity of the honey stored for 90 days showed that storage under conditions of low relative humidity (aw = 0,069-0,548) decreased water activity of honey in relation to their initial water activity, while storage under conditions of high relative humidity (aw>0,548) caused an increase in water activity of honey. It has been also shown that filtration affects the water activity. Storage in different relative humidity conditions and filtration have an impact on the values of the colour parameters of honey, too.

5

Analiza konotacji leksemu miód w zasobach wybranych języków europejskich

100%

Szerszunowicz J.

Białostockie Archiwum Językowe

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2017

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tom 17

EN

The aim of the paper is to conduct a contrastive analysis of the connotations of the lexeme HONEY in phraseological units from selected European languages. The units were excerpted from various lexicographic works. The cultural significance of honey is discussed briefly to shed light on its function in the Mediterranean cultures. The connotation of the name are divided into three categories: I – based on objective features, II – resulting from objective characteristics, mostly sweetness, III – further associations. The phraseological units are analyzed within the framework of this division, so that it could be determined which connotations are employed in particular languages.

6

Study of some physicochemical and rheological properties of irradiated honey

100%

Bera A. , Almeida-Muradian L. G. , Sabato S. F.

Nukleonika

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2008

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tom Vol. 53, suppl. 2

85--87

EN

Honey is a sweet substance produced by bees, well appreciated in many places and its consumption has been increased either as raw material or as a food ingredient. Its use as food by the consumer, or even for exportation, implies safety inherent in its quality and processing control. Gamma radiation can be applied in food or ingredients for many objectives like pathogens microorganisms’ reduction, disinfestations, and sterilization. The aim of this work was to verify some physicochemical modifications, as well as rheological evaluation of honey submitted to irradiation at 10 kGy. The physicochemical parameters analyzed were: moisture, HMF, free acidity, pH, sugars and ash. The rheological behavior was measured at different temperatures. The results indicated that few changes occurred; the rheological behavior was not impaired and did not present any significant physicochemical alteration.

7

Metody określania autentyczności miodów - cz. II. Dbajmy o jakość miodu

100%

Chudzińska M. , Barałkiewicz D.

Analityka : nauka i praktyka

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2008

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tom nr 4

23-25

8

Determination of the diastase activity in honeys

100%

Kuc J. , Grochowalski A. , Kostina M.

Technical Transactions

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2017

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tom Vol. 8(114)

29--35

EN

The diastatic number in five samples of honey has been determined by two methods: according to guidelines included in Polish standard PN-88/A-77626 and the Phadebas method. Research shows that the storage of honeys did not have a significant impact on lowering of diastatic number. However, long-term storage of honey was characterized a reduction of the diastase number. The correlation between the two applied methods was very strong (r = 0.921).

PL

Oznaczono liczbę diastazowa w pięciu miodach metodą rekomendowaną w normie PN-88/A-77626 i według metody Phadebas. Badania wskazują, że warunki przechowywania miodów nie miały większego wpływu na obniżenie liczy diastazowej. Jednak przechowywanie miodów przez dłuższy czas powoduje obniżenie wartości liczby diastazowej. Korelacja pomiędzy dwoma stosowanymi metodami była bardzo silna (r = 0,921).

9

Właściwości dielektryczne wybranych odmian miodu

100%

Łuczycka D.

Inżynieria Rolnicza

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2010

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tom R. 14, nr 5

137-142

PL

Celem pracy było sprawdzenie możliwości wykorzystania różnych wielkości dielektrycznych do różnicowania miodów naturalnych. Badano wybrane cechy dielektryczne 30 odmian miodów w częstotliwości pola elektromagnetycznego 2 kHz w temperaturze 25°C. Określenie dla patoki przenikalności elektrycznej, współczynnika strat dielektrycznych oraz konduktywności pozwala na różnicowanie miodu. Konduktywność roztworu jednoznacznie różnicuje badane grupy miodów jednak, jak wykazała analiza wyników badań, sposób jej wyznaczania może być źródłem znaczących błędów pomiarowych. Dalsze badania prowadzone na większej ilości i różnorodności miodów mogą doprowadzić do wprowadzenia nowych, skutecznych metod oceny rodzaju i jakości miodu naturalnego. Dalsze prace powinny się skupić nad wyznaczeniem ścisłych warunków pomiaru umożliwiających ocenę jakości miodu na podstawie pomiarów patoki a nie jej wodnego roztworu.

EN

The aim of the work was to check the possibility of use of various dielectric values for differentiation of natural honeys. Selected dielectric characteristics for 30 honey varieties were examined in the frequency of the 2 kHz electromagnetic field at a temperature of 25°C. The determination of permittivity, dielectric loss factor and conductivity for liquid honey helps to differentiate honeys. The conductivity of the solution clearly differentiates groups of honeys under analysis; however, as shown by the analysis of test results, the method of its determination can be a source of significant measurement errors. Further tests carried out for a larger quantity and differentiation of honeys can result in an introduction of new effective methods of evaluation of the kind and quality of natural honey. Further works should focus on the determination of strict conditions of measurement in which the quality of honey can be evaluated on the basis of measurements of liquid honey rather than its water solution.

10

Dbajmy o jakość miodu

100%

Madejczyk M. , Kanecka A. , Barałkiewicz D.

Analityka : nauka i praktyka

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2006

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tom nr 4

28-31

11

Anti-breast cancer potential of honey: a narrative review

100%

Qadirifard M. S. , Fathabadi A. , Hajishah H. , Gholami K. , Abbasi M. , Sami N. , Zo M. M. , Kadkhodaei F. , Sina M. , Ansari A. , Rahimi Z. , Deravi N.

OncoReview

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2022

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tom 12

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nr 1

5-15

EN

Cancer is responsible for the death of millions of people all around the world. Among the large group of cancers, the prevalence of breast cancer is highest in women. Therapeutic interventions, including removal surgery, radiation therapy, hormone therapy, and chemotherapy which is largely used, may cause adverse effects on the quality of patients’ life. This fact has encouraged researchers to find natural substances such as honey to overcome harmful effects. Nowadays, honey is recommended for plenty of abnormalities because of its antioxidant, anti-inflammatory, and antimicrobial properties. Various studies have been conducted to explore the anticancer benefits of different types of honey from different origins. In this review, we are going to summarize in-vitro, animal, and human studies on the anti-breast cancer potential of honey.

12

Determination of Heavy Metals in Bee Honey as a Bioindicator in the Istog, Drenas and Kastriot Regions

100%

Demaku S. , Aliu A. , Sylejmani D. , Ahmetaj B. , Halili J.

Journal of Ecological Engineering

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2023

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tom Vol. 24, nr 5

191--200

EN

The major goal of this research was to employ honey as a bio-indicator to identify the heavy metal levels in bee honey in the Istog, Drenas, and Kastriot regions. As a result, honey was purposely tested in these locations, and two industrial specific areas were chosen for examination and analysis: Kastriot (Graboc) and Drenas (Vrboc), as these are considered to be among the most industrial polluted areas. A honey sample was also taken in the Istog (Vrell, as a clean area) region in order to compare not just honey, but also the area where the bee obtains nectar, as well as the sources of pollution discharge into the environment. Concentrations of heavy metals in honey, (min. and max.) amounted to: Zn (8.705–9.804 mg/kg), Mn (5.620–5.718 mg/kg), Fe (3.635–3.745 mg/kg) and Cu (2.295–2.299 mg/kg). In contrast, lower concentrations of metals, have been observed for: Ni (0.640–1.126 mg/kg), Pb (0.235–0.268 mg/kg), As (0.107–0.199 mg/kg), Cd (0.040–0.058 mg/kg) and Cr (0.025–0.036 mg/kg) while elements such as; Hg, and Co, are almost undetected. The study of hierarchical clusters revealed several groupings of elements with geogenic and anthropogenic origins. The concentrations of heavy metals selected for honey were compared to standards of other countries, such as Poland and other European Union countries. Samples were taken in October 2020 and September 2021. The concentration of heavy metals was determined using inductively coupled plasma optical emission spectrometry, ICP OES.

13

Survey of consumer preferences on the bee product market. Part 1. Honey

88%

Kopala E. , Kuznicka E. , Balcerak M.

Annals of Warsaw University of Life Sciences - SGGW. Animal Science

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2019

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tom 58[2]

14

A study of stable isotope composition of chosen foodstuffs from the Polish market

88%

Malec-Czechowska K. , Wierzchnicki R.

Nukleonika

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2013

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tom Vol. 58, No. 2

323--327

EN

In the present work the carbon and nitrogen isotopic composition of food products bought in the retail trade in Warsaw is demonstrated. The research was carried out using meat (pork, chicken), hen eggs and honey. These products originated from the conventional and ecological farms. The values of the isotopic ratios are expressed as δ notation and correspond to the international standards (V-PDB for δ13C, and air for δ15N) according to the following general formula: δ(‰) = [(R sample / R standard) – 1] × 1000, where R represents the ratio between the less abundant and more abundant isotopes, in particular 13C/12C and 15N/14N. The results received in our laboratory, were compared with results presented in the literature for similar products. The results of the study show that the N and C stable isotope ratios in the tested products can be applied to verify their authenticity.

15

PREPARATION AND CHARACTERIZATION OF CHITOSAN-AGAR FILMS

88%

Joanna Wolska J. W. , Setkowicz J. , Maliszewska I. H.

Progress on Chemistry and Application of Chitin and its Derivatives

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2020

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tom 25

210 - 226

EN

Hydrogel films composed of chitosan and agar or chitosan, agar and honey/bee pollen were prepared; they could be used as active wound dressings. During this study, various types of gel films were prepared using chitosan with different molecular weights and ratios of the two biopolymers. In addition, compositions with different amounts of honey or bee pollen were obtained. The selected samples were characterized by determining typical properties that are important for wound dressings. The best twocomponent films had a chitosan to agar weight ratio of 2:1. From among the examined tri-component films, the 2:1:0.5 weight ratio of chitosan, agar and 50 wt% honey solution was the best composition.

16

Investigation on the possibility to enhancing honey spray drying process and powders properties by ultrafiltration pre-treatment

88%

Samborska K. , Barańska A. , Bodel D. , Jedlińska A.

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nr 3

17

Transverse study of the perception and uses of honey as a complementary and alternative medicine in Ibadan, Nigeria

88%

Ibitoye O. S.

World News of Natural Sciences

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2019

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tom 25

1-14

EN

Honey is the focus of many research projects for its varied biological activities. It is an age-old remedy that is currently being rediscovered as a complementary and alternative medicine (CAM) to be used in modern medicine. The present study aims to investigate the use and perception of honey as CAM among the general public in Ibadan metropolis. A cross sectional study was conducted using three local government areas in Ibadan, a structured and tested questionnaire was then adopted with readjustment. A total of 405 questionnaires were randomly distributed within the study area. These indicate that 63.5% (257/405) of the respondents used honey as CAM, and age significantly affects the usage/ none usage of honey in the study area (p < 0.05). Many respondents claimed they use honey as a dietary supplement for general well-being (79%, 203/257), or for treating burns/wounds (76.3, 196/257), cough (72.8%, 187/257) and sore throat (60.3%, 155/257). A small percentage of the respondents used honey to treat ulcers (17.1%, 44/257). Our work also revealed that a limited number of the respondents (13%, 32/257) buy honey from pharmaceutical stores, while information regarding honey was majorly gotten from friends and family (70%, 180/257). In addition, respondents have favourable perception of the use of honey as CAM - as over 60% of them rated strongly agree and agree for each of the perception question. Respondents highlighted some risk factors affecting the use of honey as CAM, Among which inadequate information on the use of honey ranked highest (mean = 4.40), concerns were also raised on the quality (mean = 4.33) and high price of honey used (4.31). There are favourable perception of the use of honey as CAM, but issues relating to honey quality should be determined before use. Future work should be done to test the perception and acceptance level of honey as CAM among health workers.

18

Origin of synthetic particles in honeys

88%

Liebezeit G. , Liebezeit E.

Polish Journal of Food and Nutrition Sciences

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2015

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tom 65

|

nr 2

EN

A total of 47 honeys and 22 flowering plants was analysed for their load of synthetic fibres and fragments. In all samples investigated foreign particles were found. These include also black carbon particles which were not enumerated. Fibres and fragments ranged from 10 to 336 kg-1 and 2 to 82 kg-1 honey, respectively. The data of the flowering plants analysed indicate that a major proportion of the particle load may originate from external sources, i.e. these particles are brought into the beehive by the worker bees during nectar collection.

19

Tri-city and surrounding area residents’ opinion about honey produced by bees fed with nanoparticles of gold and silver

88%

Przybyłowski P. , Żak N. , Wilczyńska A.

Zeszyty Naukowe Akademii Morskiej w Gdyni

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2016

|

tom nr 94

114--120

EN

The use of nanotechnology achievements may enable creation of products with yet unknown properties. Products created based on principles of nanotechnology are prone to carry a high risk related to lack of social acceptance. Following study attempts to assess degree of acceptance and readiness to consume honey produced by bees fed with nanoparticles. The study group consisted of 100 participants, at the age of 18 to 70 from the Tri-City and the surrounding areas. The research found that most people were not willing to try honey produced by bees fed with nanoparticles of gold and silver. They fear for their lives and health. Survey participants declared minimal level of knowledge about honey produced by bees fed with nanoparticles. Respondents agreed, that product innovations should not lead to increase of their retail prices.

20

Antioxidant effect of natural honeys affected by their source and origin

88%

Mellen M. , Fikselova M. , Medelova A. , Hascik P.

Polish Journal of Food and Nutrition Sciences

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2015

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tom 65

|

nr 2

EN

In purpose to examine the antioxidant activity of 15 natural honeys of different origin ABTS method was used, total phenol content and dry matter content of honey samples were determined. Honeys were collected from different locations of Slovakia, Poland and Serbia and were represented as monofl oral and multifl oral samples (10) which originated from Poland and Slovakia, forest samples (4) originated from Serbia and honeydew honey. Average values of antioxidant activity observed in samples of honeys ranged from 0.62 to 4.63 mmol/kg. The highest antioxidant activity was detected in buckwheat honey and the lowest was shown in acacia honey. By observing the impact of individual honey samples on antioxidant activity it was found that the sample had a highly statistically signifi cant effect. 10 homogeneous groups which varied in the antioxidant activity among each other were established by all 15 samples. Antioxidant activity of honeys could be a positive infl uence factor in terms of honey differentiation, especially in the case of the forest honeys collected from different places. Monofl oral and multifl oral honeys (10) established 5 homogenous groups, but in the case of several multifl oral honeys which originated from different places of Poland and Slovakia no statistically signifi cant differences were found.