Search results for "HONEY"
showing 10 items of 161 documents
Determination of pesticide residues in honey bees, pollen and beeswax: assessing pesticide hazard in spanish apiaries
2020
Pollinator decline is an emerging worldwide problem with serious repercussions on agriculture and environment. Around one third of human food relies on insect pollination, and most of the flowering plants need pollinators to survive. Honey bee is the main pollinator in environments where anthropogenic pressure has reduced the number of native pollinators, like urban, rural and agricultural areas. The main cause of beekeeping crisis is parasite Varroa destructor and secondary infections associated with the mite. Pesticide contamination and nutritional deficiencies, combined with the parasite, can act synergistically and reduce survival of bee colonies. Honey bees patrol extensive areas when …
Transfer of Immunity from Mother to Offspring Is Mediated via Egg-Yolk Protein Vitellogenin.
2015
Insect immune systems can recognize specific pathogens and prime offspring immunity. High specificity of immune priming can be achieved when insect females transfer immune elicitors into developing oocytes. The molecular mechanism behind this transfer has been a mystery. Here, we establish that the egg-yolk protein vitellogenin is the carrier of immune elicitors. Using the honey bee, Apis mellifera, model system, we demonstrate with microscopy and western blotting that vitellogenin binds to bacteria, both Paenibacillus larvae – the gram-positive bacterium causing American foulbrood disease – and to Escherichia coli that represents gram-negative bacteria. Next, we verify that vitellogenin bi…
Preliminary studies of geochemical tools to traceability of Sicilian honey
2019
Today is increasing the attention of consumers for the origin of food and high reputation of products with a distinct geographical identity. Food traceability is an important issue in food safety and quality control, with impacts on food security, its quantity and overall availability. Furthermore, the possibility of tracing the origin of foodstuff is assuming an increasingly important role at the legislative level, as a tool that may allow to prove on product authenticity and to control adulteration So, establish systems to trace food or feed products through specified stages of production, processing and distribution play a key role also to ensure food safety. For these reason, in the las…
Looking for ancient wine as gift for the Prince of Lavau (5th c. BC)
2017
International audience; The excavations at Lavau brought to light a large monumental necropolis with a central burial mound overlying an undisturbed chieftain’s grave from the end of the Early Iron Age or the beginning of the Late Iron Age. In the funerary chamber rich grave furniture accompanied the dead: a bronze cauldron containing serving and drinking vessels of ceramic, silver, and bronze, two bronze plates, and a cist. As there were visible deposits present on the inner surface of the cauldron, a series of samples were taken from different parts of the cauldron and the locally made oenochoe. Using a double-step methodology of extraction and structural analysis by GC-MS, the main bioma…
Chemiczne markery miodów odmianowych
2011
Honey is a natural food product reach in variety of chemical compounds, which are responsible for its quality and aroma. Unifloral honeys are especially attractive for buyers and are quite frequently falsified. Thus, the assessment of their quality is indispensable. Today it relays on identification of the pollen and determination of honey physicochemical properties. In this paper the new methods for the assessment of honey quality are described. They relay on analysis and identification of volatile compounds typical for certain uniflolar honeys. These compounds are called markers. These could virtually all natural products with products of decomposition of phenylalanine, terpenes, flavonoi…
CHEMICAL CONTAMINATION OF BEE HONEY – IDENTIFYING SENSOR OF THE ENVIRONMENT POLLUTION
2005
Changes in the quality of bee honey are also caused by the contamination with micro-polluting agents, toxic to consumers. This research is about chemical contamination of honey. The honey used in this study was harvested from beehives situated in Copşa Mica (Sibiu region), famous for the ecological unbalances induced by the non-ferrous metal industry through pollution produced by SC Sometra SA. The amount of Pb, Cd and Zn contained in the samples harvested in the area specifi ed above have been determined using an atomic absorption spectrometer AAS. Amounts of heavy metals above the admitted limit by the OMS 975/88 have been discovered. The results suggested that honey could be used to dete…
Od pszczoły mitycznej do pszczoły współczesnej, czyli o kuriozalnej utracie znaczeń
2016
Tekst traktuje o jednym z owadów pszczole, a dokładniej - o utracie znaczeń, jakie były temu stworzeniu przypisywane na przestrzeni wieków, w różnych kontekstach kulturowych. Poczynając od pszczoły mitycznej, która traktowana była w sposób absolutnie wyjątkowy, jako stworzenie święte, uosabiała często bóstwa lub bywała ich atrybutem, przez kulturę tradycyjną, w której te znaczenia wciąż jeszcze były przechowywane, przechodzi się w tekście do współczesności, w której pszczoła jest co najwyżej dostarczycielką miodu, można być jeszcze pracowitym jak pszczółka, przede wszystkim zaś stała się ona gadżetem kultury popularnej. O tej kuriozalnej utracie znaczeń opowiada tekst.
Preventive Impact of Long-Term Ingestion of Chestnut Honey on Glucose Disorders and Neurodegeneration in Obese Mice
2022
The purpose of the present study was to evaluate the impact of long-term honey ingestion on metabolic disorders and neurodegeneration in mice fed a high-fat diet (HFD). Three groups of mice were fed with a standard diet (STD), HFD or HFD supplemented with honey (HFD-H) for 16 weeks. Biochemical, histological, Western blotting, RT-PCR and Profiler PCR array were performed to assess metabolic parameters, peripheral and central insulin resistance and neurodegeneration. Daily honey intake prevented the HFD-induced glucose dysmetabolism. In fact, it reduced plasma fasting glucose, insulin and leptin concentrations and increased adiponectin levels. It improved glucose tolerance, insulin sensitivi…
Sensory analysis integrated by palynological and physicochemical determinations plays a key role in differentiating unifloral honeys of similar botan…
2015
Summary Myrtaceae honeys produced in Sierra Morena (southern Spain, Andalusia) are obtained from both Eucalyptus camaldulensis and Myrtus communis, and honeys can be easily confused when classified as they come from the same botanical family. The characterisation was intended on the basis of their physicochemical, sensory and palynological properties. Cluster analysis (CA) and principal component analysis (PCA) allowed us to make a distinction between two honey profiles. The first one corresponds to the European sensory profile described for Eucalyptus unifloral honeys. The second profile, which sensory characteristics are absolutely different, has not been previously described. Classificat…
Nigeria poligama. Prudenti come serpenti di Lola Shoneyin
2012
Recensione di Prudenti come serpenti, romanzo della scrittrice nigeriana Lola Shoneyin.