scholarly journals Influence of the Collection Season on Production, Size, and Chemical Composition of Bee Pollen Produced by Apis Mellifera L.

2014 ◽  
Vol 58 (2) ◽  
pp. 5-10 ◽  
Author(s):  
Adriana F. Negrão ◽  
Lidia M. R. C. Barreto ◽  
Ricardo O. Orsi
Keyword(s):  
Particle Size ◽  
Apis Mellifera ◽  
Chemical Composition ◽  
Protein Content ◽  
Nutritional Quality ◽  
Particle Sizes ◽  
Bee Pollen ◽  
Pollen Loads ◽  
Food Scarcity ◽  
Collection Period

Abstract The aim of our study was to investigate how the collection period affects and influences the production, chemical composition, and size of bee pollen loads (0.5, 1.0, 2.0, greater than 2.0 mm). The results showed there was a predominance of pollen loads with a diameter greater than 2.0 mm in all the production seasons. For all the seasons, there were no differences in protein content between the particle sizes. But when comparing 0.5 mm during the different periods, there were significant differences; the highest value was found during the winter (24.39 ± 3.7%). As far as lipids and crude fiber are concerned, we obtained differences between the same granulometry sizes for the spring and summer seasons. As for ashes, the results showed differences between different particle sizes for the summer and autumn seasons. Our results have shown that regardless of pollen particle size, its quality was not altered, suggesting that smaller loads can be commercially used by containing nutritional quality or else be used by beekeepers as a supplement during periods of food scarcity.

scholarly journals The nutritional quality of feedstuffs used in dairy goat nutrition in Vojvodina

2019 ◽  
Vol 35 (2) ◽  
pp. 163-178
Author(s):  
Snezana Paskas ◽  
Jelena Miocinovic ◽  
Branislav Vejnovic ◽  
Zsolt Becskei
Keyword(s):  
Chemical Composition ◽  
Medicago Sativa ◽  
Protein Content ◽  
Nutritional Quality ◽  
Lignin Content ◽  
Dairy Goat ◽  
Crude Fibre ◽  
Significant Difference ◽  
Medicago Sativa L

The study was to conduct to evaluate the chemical composition and nutritive values of feedstuffs (forages and concentrate mixtures) used for dairy goats nutrition in Vojvodina. Samples were collected from six farms, including one organic farm. The results showed that the relative feed values of analyzed forages were in the range of good, medium to lower quality. Average protein content from lowest to highest for investigated forages was: corn silage (Zea Mays) (65.37-82.57g kg??DM), alfalfa haylage (Medicago sativa L.) (159.99-184.17g kg??DM), pasture (185.30g kg?? DM), and alfalfa hay (Medicago sativa L.) (167.48-203.60g kg??DM). The non-fibre carbohydrates and protein content most varied in organic hay samples (cv: 29.25% and 19.09%, respectively). Generally, feedstuffs used in organic nutrition, including organic concentrate, were of lower nutritional quality and moreover contained higher amounts of crude fibre and lignin. Especially, a high source of variation was observed in investigated concentrate mixtures for the crude protein content (p<0.0001), ranged from 135.32 to 209.87g kg??DM. Corn silages also varied substantially in their chemical composition and significant difference (p<0.05) was observed in regard to acid detergent fibre (ADF) and lignin content (ranged: ADF: 242.20-319.24g kg??DM; ADL: 27.98-52.54g kg??DM, respectively). Furthermore, pasture contained the most soluble materials during May and June and their content was related inversely to crude fibre amount. This survey highlights that investigated farms still pay insufficient attention to the quality of the feedstuff. For the development of intensive goat farming, greater emphasis should be placed on using higher quality feedstuffs, as well, standards for feed quality must be considered and established.

scholarly journals Botanical profile of bee pollen from the southern coastal region of Bahia, Brazil

2010 ◽  
Vol 24 (3) ◽  
pp. 862-867 ◽  
Author(s):  
Marcos da Costa Dórea ◽  
Jaílson Santos de Novais ◽  
Francisco de Assis Ribeiro dos Santos
Keyword(s):  
Apis Mellifera ◽  
Plant Species ◽  
Coastal Region ◽  
Botanical Origin ◽  
Mimosa Pudica ◽  
Bee Pollen ◽  
Pollen Loads ◽  
Pollen Types ◽  
Pollen Sources ◽  
Forest Biome

This paper aims to identify the botanical origin of pollen loads collected by Apis mellifera L. in Canavieiras municipality, Bahia state. It provides a list of polliniferous plant species from the Atlantic Forest biome that are important for the development of regional apiculture. Using the acetolysis method, 35 bee-pollen samples were analyzed qualitatively and quantitatively. Results showed that pollen types Elaeis (23.99%), Mimosa pudica (22.78%) and Cecropia (13.68%) were the most abundant among the samples. These also showed the highest relative frequencies of the material studied and were important pollen sources for bees in the study area.

scholarly journals The botanical profiles of dried bee pollen loads collected by Apis mellifera (Linnaeus) in Brazil

Sociobiology ◽  
2013 ◽  
Vol 60 (1) ◽  
Author(s):  
Alex Freitas ◽  
Vanilda Aparecida Soares de Arruda ◽  
Ligia Bicudo de Almeida-Muradian ◽  
Ortrud Monika Barth
Keyword(s):  
Apis Mellifera ◽  
Bee Pollen ◽  
Pollen Loads

scholarly journals Study the Effect of Particle Sizes and Concentration on the Rheological Properties of Iraqi Bentonite for Using as Drilling Fluids

2020 ◽  
Vol 26 (3) ◽  
pp. 65-76
Author(s):  
Ahmed Sattar Ibrahim ◽  
Mayssaa Ali Al-bidry
Keyword(s):  
Particle Size ◽  
Chemical Composition ◽  
Particle Size Distribution ◽  
Rheological Properties ◽  
Size Distribution ◽  
Mineral Composition ◽  
Drilling Fluid ◽  
Drilling Fluids ◽  
Particle Sizes ◽  
Effect Of Particle Size

The aim of this study is to identify the effect of particle size and to increase the concentration of Iraqi bentonite on rheological properties in order to evaluate its performance and to know if it can be used as drilling fluid without additives or not. In this study, Iraqi bentonite was carried out by mineral composition (XRD), chemical composition (XRF) and Particle size distribution (PSD), and its rheological properties were measured at different particle size and concentration. The results showed that when the particle size of Iraqi bentonite decreased, and the rheological properties were increased with increased concentration of Iraqi bentonite. Also, Iraqi bentonite was unable to use as drilling fluid without certain additives.

scholarly journals The effect of bee pollen as dietary supplement on meat chemical composition for broiler Ross 308

2013 ◽  
Vol 61 (1) ◽  
pp. 71-76 ◽  
Author(s):  
Peter Haščík ◽  
Ibrahim Omer Elamin Elimam ◽  
Jozef Garlík ◽  
Miroslava Kačániová ◽  
Juraj Čuboň ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Protein Content ◽  
Fat Content ◽  
Control Group ◽  
Water Contact ◽  
Bee Pollen ◽  
Energy Value ◽  
Thigh Muscles ◽  
Significant Difference ◽  
Positive Effect

The present experiment was aimed to study the effect of bee pollen on the meat chemical composition of broiler’s Ross 308 breast and thigh muscles. In the experimental groups were added bee pollen in an amount (group E1 – 2 500 mg.kg−1, group E2 – 3 500 mg.kg−1 and E3 – 4 500 mg.kg−1) to the feed mixtures for 42 days. At the end of the study the water content was higher in experimental groups than the control group and on breasts there were a significant difference (P ≤ 0.05) between control groups and experimental groups (E1, E2 and E3) also there was a significant difference (P ≤ 0.05) between the experimental E3 and experimental E1, E2 groups. In protein content, the control group was higher than experimental groups and there no significant differences (P ≥ 0.05) among the groups. In fat content, the control group (2.04%, 13.2%) was higher than experimental groups E1 group (1.59%, except thigh 14.11%), E2 group (1.70%, 13.00%) and E3 group (1.51%, 10.96%) and on breast there were significant differences (P ≤ 0.05) between control group and experimental groups E1, E3 and on thigh there were significant differences (P ≤ 0.05) between experimental E3 and experimental E1, E2 groups. In energy value (kJ.100 g−1) of the breast and thigh muscles in control was higher than experimental groups and on the breasts there were a significant differences (P ≤ 0.05) between control group and experimental groups (E1, E3) and on the thigh there were significant differences (P ≤ 0.05) between experimental E1 and experimental E3 groups. From the study we concluded that the bee pollen has a positive effect of the breast’s meat chemical composition of broiler, which led to increase the water contact and reduce the fat content and energy value, but he had a normal effect on thigh, also bee pollen has normal effect on the protein content of the breast and thigh muscles.

scholarly journals Beebread from Apis mellifera and Apis dorsata. Comparative Chemical Composition and Bioactivity

2017 ◽  
Vol 74 (1) ◽  
pp. 43
Author(s):  
Otilia BOBIS ◽  
Daniel Severus DEZMIREAN ◽  
Liviu Alexandru MARGHITAS ◽  
Victorita BONTA ◽  
Rodica MARGAOAN ◽  
...  
Keyword(s):  
Apis Mellifera ◽  
Chemical Composition ◽  
Protein Content ◽  
Total Protein ◽  
Soxhlet Extraction ◽  
Climatic Conditions ◽  
Total Protein Content ◽  
Composition Analysis ◽  
Apis Dorsata ◽  
Bioactive Properties

Beebread is a valuable bee product, both for bee nutrition and for humans. The high nutritional and bioactive properties of beebread were evaluated by chemical composition analysis of beebread from Apis mellifera and Apis dorsata. Bee bread harvested from Romania and India, coming from Apis mellifera and Apis dorsata bees, were evaluated for their chemical composition. Analyses were made in APHIS Laboratory from USAMV Cluj, using validated methods for bee products. Lipids were determined by the Soxhlet extraction method, total protein content was determined by Kjehldahl method, sugar spectrum was determined by high performance liquid chromatography with refractive index detection (HPLC-IR). Water content of beebread samples were situated between 11.45 and 16.46%, total protein content between 16.84 and 19.19% and total lipids between 6.36 and 13.47%.  Beebread has high bioactive properties which can be expressed as antioxidant and/or antibacterial activity. Chemical composition and bioactive properties of beebread is influenced by floral origin of the pollen which the bees collect and place in combs for fermentation. Also the climatic conditions have an important role in developing different fermentation compounds, that may act as antioxidants or antibacterial agents.

Sintering Studies and Microstructural Evolution of Fe-MoS2 Mixtures

2014 ◽  
Vol 802 ◽  
pp. 415-420 ◽  
Author(s):  
Kaline Pagnan Furlan ◽  
Julia Zimmermann de Assunção ◽  
Gustavo Paz ◽  
Cristiano Binder ◽  
Aloisio Nelmo Klein
Keyword(s):  
Particle Size ◽  
Chemical Composition ◽  
Molybdenum Disulfide ◽  
Microstructural Evolution ◽  
Solid Lubricant ◽  
Particle Sizes ◽  
Iron Sulfides ◽  
Iron And Steel ◽  
The World

The development of dry self-lubricating materials is directly linked to the rising requirements of performance. Iron and steel are the most used metals around the world and molybdenum disulfide (MoS2) one of the most used solid lubricant. Therefore it is expected that one might try to develop self-lubricating steels containing MoS2, however MoS2 reacts with steel matrices during sintering. This work has focused on the study of these reactions; temperatures at which this occurs; the influence of particle sizes and MoS2 content and also MoS2 influence during processing and in the parts properties. The results showed that the reaction occurs at lower temperatures than the predicted and the products are iron-molybdenum and iron sulfides. The sintering studies revealed that MoS2 enhances sintering and the particle size and MoS2 content directly influenced the morphology and chemical composition of the resulting phases.

Surface energy of cellulosic materials: The effect of particle morphology, particle size, and hydroxyl number

TAPPI Journal ◽  
2015 ◽  
Vol 14 (9) ◽  
pp. 565-576 ◽  
Author(s):  
YUCHENG PENG ◽  
DOUGLAS J. GARDNER
Keyword(s):  
Particle Size ◽  
Surface Energy ◽  
Particle Morphology ◽  
Nanofibrillated Cellulose ◽  
Particle Sizes ◽  
Hydroxyl Number ◽  
Small Individual ◽  
Dispersion Component ◽  
Commercial Applications ◽  
Lower Temperature

Understanding the surface properties of cellulose materials is important for proper commercial applications. The effect of particle size, particle morphology, and hydroxyl number on the surface energy of three microcrystalline cellulose (MCC) preparations and one nanofibrillated cellulose (NFC) preparation were investigated using inverse gas chromatography at column temperatures ranging from 30ºC to 60ºC. The mean particle sizes for the three MCC samples and the NFC sample were 120.1, 62.3, 13.9, and 9.3 μm. The corresponding dispersion components of surface energy at 30°C were 55.7 ± 0.1, 59.7 ± 1.3, 71.7 ± 1.0, and 57.4 ± 0.3 mJ/m2. MCC samples are agglomerates of small individual cellulose particles. The different particle sizes and morphologies of the three MCC samples resulted in various hydroxyl numbers, which in turn affected their dispersion component of surface energy. Cellulose samples exhibiting a higher hydroxyl number have a higher dispersion component of surface energy. The dispersion component of surface energy of all the cellulose samples decreased linearly with increasing temperature. MCC samples with larger agglomerates had a lower temperature coefficient of dispersion component of surface energy.

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