scholarly journals Effect of laying hens age and housing system on physicochemical characteristics of eggs

2021 ◽  
Vol 21 (1) ◽  
pp. 291-309
Author(s):  
Sebastian Nowaczewski ◽  
Lidia Lewko ◽  
Marta Kucharczyk ◽  
Kinga Stuper-Szablewska ◽  
Magdalena Rudzińska ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Breaking Strength ◽  
Physicochemical Characteristics ◽  
Quality Characteristics ◽  
Point Of View ◽  
Housing System ◽  
Shell Quality ◽  
Housing Systems ◽  
Maintenance System

Abstract In this study, the objective was to evaluate the effect of the age of Hy-line Brown hens – 44 and 60 weeks of age (26 and 42 weeks of laying) and housing system (enriched cages and litter) on the quality of eggs. According to our results, eggs with a better quality of albumen were obtained from younger hens than from older hens. Moreover, older hens produced eggs with inferior quality related to shell parameters, such as greater elastic deformation, poorer breaking strength, and thinner shells. However, hens kept in a litter housing system laid eggs with superior shell quality characteristics of less flexible and greater breaking strength, even though the thickness, weight, and percentage were similar in both housing systems. In addition, a higher amount and activity of lysozyme were obtained from eggs laid by hens kept in the litter housing system than those obtained from hens kept in cages. The maintenance system and age of birds also had a significant (P≤0.05) effect on the basic chemical composition of eggs, as well as on the proportion of individual elements and fatty acid profile. Taking these results into account, we can conclude that the more valuable characteristics from the morphological and nutritional point of view were observed in eggs obtained from younger Hy-line hens kept in the litter housing system.

scholarly journals Evaluation of bone strength, keel bone deformity and egg quality of laying hens housed in small group housing systems and furnished cages in comparison to an aviary housing system

2008 ◽  
Vol 51 (2) ◽  
pp. 179-186 ◽  
Author(s):  
B. Scholz ◽  
S. Rönchen ◽  
H. Hamann ◽  
C. Sürie ◽  
U. Neumann ◽  
...  
Keyword(s):  
Small Group ◽  
Egg Quality ◽  
Breaking Strength ◽  
Quality Parameters ◽  
Housing System ◽  
Bone Deformity ◽  
Bone Status ◽  
Three Point Bending ◽  
Housing Systems

Abstract. The objective of the study was to assess bone breaking strength, keel bone status and egg quality parameters of Lohmann Silver (LS) and Lohmann Tradition (LT) layers housed in small group systems (SG) and furnished cages (FC) in comparison to an aviary system. At the end of the 3rd, 6th, 9th and 11th laying month, approximately 40 hens were randomly chosen from each housing system and slaughtered (478 hens in total). Humerus and tibia strengths were analysed using a three-point-bending machine. Keel bone status was evaluated on a scale from 1 (severe) to 4 (no deformity). Shell breaking strength was measured every four weeks, totalling 4,887 eggs. Statistical analyses were performed using the MIXED procedure of SAS. Humerus and tibia strengths of LS layers housed in SG were significantly higher compared to LS hens kept in FC. Bone breaking strengths of humerus and tibia in LS and LT layers were highest in the aviary system and the differences to the other housing systems were significant. No significant differences in tibia and humerus bone breaking strengths were found between SG and FC for LT hens. Keel bone status was not significantly influenced by housing system or laying strain. For both hybrids, shell breaking strength was significantly lower in SG compared to FC and aviary system. The results showed that SG systems can significantly enhance bone breaking strength for LS layers in comparison to hens kept in FC. The lower shell breaking strength of eggs in SG might slightly impair economic aspects.

scholarly journals Effect of Production Systems on Quality and Chemical Composition of Table Eggs

2016 ◽  
Vol 65 (3-4) ◽  
pp. 27-31 ◽  
Author(s):  
Lidija Perić ◽  
Mirjana Đukić Stojčić ◽  
Siniša Bjedov
Keyword(s):  
Chemical Composition ◽  
Production System ◽  
Egg Quality ◽  
Production Systems ◽  
Breaking Strength ◽  
Fat Content ◽  
Housing System ◽  
Omega 3 ◽  
Free Range

SummaryProduction system is one of the most important factors which have an effect on egg quality. In recent years consumers have paid more attention to the housing system in which eggs are produced with a significant increase of their interest in organic and functional food. Some consumers perceive omega-3 enriched eggs and free range eggs as beneficial for their health. Therefore, the aim of this work was to determine the chemical composition and the internal and external quality of eggs produced in conventional cages, free range systems and of omega-3 enriched eggs. Samples of 30 eggs from three different production systems were taken from the market. For eggs from each system the internal and external egg quality traits were examined as well as the protein and fat content. The results showed lower fat content in eggs from cages (P<0.05). Free range and omega-3 eggs had higher content of protein in egg white compared to the conventional ones (P<0.05). Production system significantly influenced the shell breaking strength, Haugh units and yolk color. The shell breaking force was significantly higher in free range eggs (P<0.05). The highest value of Haugh units was found in free range eggs and the lowest in omega-3 enriched eggs. The results of this work confirmed that there are differences in quality and the chemical composition of eggs from different production systems.

scholarly journals Blood Plasma Mineral Profile and Qualitative Indicators of the Eggshell in Laying Hens in Different Housing Systems

2009 ◽  
Vol 78 (3) ◽  
pp. 419-429 ◽  
Author(s):  
Aleš Pavlík ◽  
Martina Lichovníková ◽  
Pavel Jelínek
Keyword(s):  
Blood Plasma ◽  
Laying Hens ◽  
Breaking Strength ◽  
Housing System ◽  
Shell Quality ◽  
Housing Systems ◽  
Cage System ◽  
Mineral Profile ◽  
Egg Shell ◽  
Mineral Concentrations

The aim of this study was to compare the blood plasma mineral profile (Ca, P, K, Mg, Zn, Cu and Se) and egg-shell quality (eggshell weight, eggshell breaking strength and thickness) of laying hens housed in three different housing systems (traditional cage system, enriched cage system and deep litter system). In each housing system, 12 ISA Brown laying hens were observed during the laying period from week 22 to 75 of age. The effect (p < 0.05 and p < 0.01) of age and/or phase of the laying cycle on all mineral concentrations was determined. Eggshell breaking strength decreased (p < 0.001) with the age of birds. The results of this study indicate that the housing systems compared had no significant effect on the blood plasma mineral profile of laying hens under study and the values were within the physiological range. However, a significant effect of housing system on eggshell breaking strength and eggshell weight was found. Improved eggshell quality was obtained in most periods of the laying cycle in the enriched cage systems.

scholarly journals KARAKTERISTIK FISIKOKIMIA PATI SAGU HASIL PENGERINGAN SECARA FLUIDISASI MENGGUNAKAN ALAT PENGERING CROSS FLOW FLUIDIZED BED BERTENAGA SURYA DAN BIOMASSA

REAKTOR ◽  
2011 ◽  
Vol 13 (3) ◽  
pp. 155 ◽  
Author(s):  
Abadi Jading ◽  
Eduard Tethool ◽  
Paulus Payung ◽  
Sarman Gultom
Keyword(s):  
Chemical Composition ◽  
Fluidized Bed ◽  
Cross Flow ◽  
Physicochemical Characteristics ◽  
Sago Starch ◽  
Drying Time ◽  
Fluidized Bed Dryer ◽  
Conventional Drying ◽  
Fluidized Bed Drying

PHYSICOCHEMICAL CHARACTERISTICS OF SAGO STARCH OBTAINED FROM FLUIDIZED BED DRYING USING SOLAR AND BIOMASS POWERED CROSS FLOW FLUIDIZED BED DRYER. The research aim is to study the comparative quality of sago starch drying results using cross flow fluidized bed dryer powered by solar and biomass in conventional drying, particularly the chemical composition and physicochemical characteristics. This research was conducted through a drying phase of wet sago starch using a cross flow fluidized bed dryer, and drying in conventional as well as dried sago starch quality testing results are drying. The results of this study indicate that dry sago starch which has been drained by means of cross flow fluidized bed dryer has a chemical composition that does not vary much with starch which is dried by conventional drying, so that the dried sago starch produced by the dryer is very good. On the other hand the use of dryers is the more correct because the physicochemical properties of sago starch using a low drying temperature and drying time is short. Tujuan penelitian ini adalah mempelajari perbandingan kualitas pati sagu hasil pengeringan menggunakan alat pengering cross flow fluidized bed bertenaga surya dan biomassa dengan pengeringan secara konvensional, khususnya komposisi kimia dan karakteristik fisikokimia. Penelitian ini dilakukan melalui beberapa tahapan yaitu pengeringan pati sagu basah menggunakan alat pengering cross flow fluidized bed, pengeringan secara konvensional serta pengujian kualitas pati sagu kering hasil pengeringan. Hasil dari penelitian ini menunjukkan bahwa pati sagu kering yang telah dikeringkan dengan alat pengering cross flow fluidized bed memiliki komposisi kimia yang tidak berbeda jauh dengan pati yang dikeringkan dengan cara pengeringan secara konvensional, sehingga pati sagu kering yang dihasilkan oleh alat pengering tersebut sangat baik. Di sisi lain penggunaan alat pengering ini semakin memperbaiki sifat fisikokimia pati sagu sebab menggunakan suhu pengeringan yang rendah dan waktu pengeringan yang singkat.   Kata Kunci: pengering unggun terfluidakan; fisikokimia; pati sagu

Nondestructive Quality Evaluation From a Horticulturist's Point of View

1978 ◽  
Vol 41 (1) ◽  
pp. 63-66 ◽  
Author(s):  
W. E. BALLINGER ◽  
W. F. McCLURE ◽  
E. P. MANESS ◽  
W. B. NESBITT ◽  
D. E. CARROLL ◽  
...  
Keyword(s):  
Quality Evaluation ◽  
Fruits And Vegetables ◽  
Quality Characteristics ◽  
Point Of View ◽  
High Quality ◽  
Nondestructive Techniques ◽  
Nondestructive Quality

Application of nondestructive sorting of fruits can be direct or indirect. Direct applications involve mainly objective means of establishing grades and quality of fruits and vegetables, as well as use of light-sorting and other nondestructive means for determining when a crop should be harvested or whether it should be marketed fresh or processed immediately. Indirect applications might be termed “research” usage of nondestructive sorting. Plant breeders would find nondestructive techniques useful for rapidly evaluating quality characteristics during the development of high quality cultivars. Physiologists could utilize it to rapidly determine the effects of treatments upon the quality of the commodity. Examples of development of techniques of light-sorting of blueberries and grapes for ripeness are discussed.

scholarly journals Dairy cows welfare quality in loose vs tie housing system

2011 ◽  
Vol 27 (3) ◽  
pp. 975-984 ◽  
Author(s):  
D. Ostojic-Andric ◽  
S. Hristov ◽  
Z. Novakovic ◽  
V. Pantelic ◽  
M.M. Petrovic ◽  
...  
Keyword(s):  
Quality Parameters ◽  
Health Condition ◽  
Housing System ◽  
Assessment Protocol ◽  
Housing Systems ◽  
Dairy Animals ◽  
Welfare Quality ◽  
Cow Welfare ◽  
Lying Down

The subject of this research was to determine the effect of the housing system on quality of welfare of dairy cattle in Serbia. Study was realized on six farms, capacity of 30 to 900 cows, with loose and tie housing system. Assessment of the welfare quality parameters was done by using the Welfare Quality? Assessment Protocol for Cattle, 2009. Results of the research show that the welfare quality of dairy animals is under the significant effect of housing system, and that loose system has the advantage when it comes to comfort around resting, easy of movements and health condition of cows. Share of not lame cows (81%) and cows with no lesion (86%) was significantly higher (p<0.01) in loose system. Indicator values: duration of lying down movements (6.53 sec), lying down movements with collisions (18.7%) and lying outside lying area (28.4%) in tie system were significantly higher (p<0.01) compared to loose system indicating the inadequacy of the housing and lack of comfort. Analysis of indicators associated with cow hygiene (dirty legs and udder) and diseases (dystocia) points to significant gaps in management in both housing systems which represent significant threat to cow welfare quality.

scholarly journals Buffalo mozzarella chemical composition and authenticity assessment by electrophoretic profiling

2017 ◽  
Vol 38 (4) ◽  
pp. 1841
Author(s):  
Ben-Hur Ramos Ferreira Gonçalves ◽  
Grazielly De Jesus Silva ◽  
Daniele Gomes Conceição ◽  
Antonio Silvio do Egito ◽  
Sibelli Passini Barbosa Ferrão
Keyword(s):  
Chemical Composition ◽  
Electrophoretic Analysis ◽  
Physicochemical Characteristics ◽  
Buffalo Milk ◽  
Water Soluble ◽  
Cow Milk ◽  
Cow’S Milk ◽  
Cow's Milk ◽  
Sds Page

Buffalo milk mozzarella is often adulterated by the addition of cow’s milk. The aim of this study was to assess the quality of buffalo milk mozzarella by using electrophoresis (SDS-PAGE) to detect the addition of cow’s milk. Reference cheeses were produced exclusively from combinations of buffalo and cow milk, and labeled reference treatment buffalo or cow (RTB and RTC, respectively). Standardized cheeses were made by combining buffalo milk and 2.5%, 5.0%, 10%, 20%, 30%, 40% or 50% cow’s milk. A total of 9 cheese formulations were produced and either frozen immediately (time 0) or after 20 days (time 20). Eighteen commercial samples of buffalo mozzarella were sampled between 0–20 days of production. The chemical composition (moisture, ash, fat in dry matter, protein, total solids and defatted dry extract) and physicochemical characteristics (acidity) of the cheeses were evaluated. Proteins and water-soluble peptides (WSP) extracted from RTB, RTC and from the commercial samples, and were analyzed by SDS-PAGE electrophoresis under denaturing conditions. It was not possible to detect the inclusion of cow’s milk by the cheeses’ chemical and physicochemical properties. However, the separation and detection of peptide and protein fractions of the cheese was possible by electrophoresis. The results of the electrophoretic analysis suggest that 28% of the commercial samples considered here had evidence of the addition of cow’s milk. The methodology described here is important to identify occurrences of fraud in buffalo mozzarella production.

Feedlot performance, carcass composition and meat quality of free-range reared pigs

1997 ◽  
Vol 77 (2) ◽  
pp. 225-232 ◽  
Author(s):  
A. P. Sather ◽  
S. D. M. Jones ◽  
A. L. Schaefer ◽  
J. Colyn ◽  
W. M. Robertson
Keyword(s):  
Meat Quality ◽  
Wholesale Price ◽  
Carcass Composition ◽  
Housing System ◽  
Feedlot Performance ◽  
Free Range ◽  
Housing Systems ◽  
Key Words Animal ◽  
Potential Benefits

The effects of the housing system (confinement versus free-range) and season (summer versus winter) on growth performance, carcass composition and meat quality were determined from commercial pigs with known NN genotype at the halothane locus. Free-range-housed pigs reared from 25 to 105 kg required 16 ± 1.2 (SEM) more days to reach market weight compared with confinement-housed pigs. Housing did not affect feed requirements during the summer, but food consumption increased by 13.7% for free-range pigs during the winter. Confinement-reared pigs had a 0.75 ± 0.28 kg heavier commercial carcass weight than free-range-reared pigs. While there was no difference in carcass fat thickness, muscle depth was 2.4 ± 1.02 mm greater in free-range-reared pigs with increased predicted lean yield from 59.1 ± 0.24% to 59.8 ± 24%. Free-range-reared pigs had heavier butts, loins and hams, and lighter bellies, which increased their wholesale carcass value by 2.9%. Furthermore, they had greater dissected lean in the picnic (2.0%) butt (4.0%), loin (4.5%) and ham (2.0%) with no compromise to pork quality. If the wholesale price is adjusted for the increased lean content of each cut by an additive or multiplicative model, apparent value was further increased to 5.7 or 8.1%. While these results suggest a beneficial effect on carcass merit when rearing hogs in outdoor facilities, they further suggest potential benefits to carcass grading using developing technologies that recognize differences in carcass conformation. Key words: Animal ethics, Landrace, carcass value, housing systems

scholarly journals Analysis of drying operation and quality evaluation of crushed meat prepared from three trims of low beef marketing

2019 ◽  
Vol 6 (5) ◽  
pp. 254-257
Author(s):  
Pollorena Gregorio Lopez ◽  
Ariana Sainz Melissa Hernandez ◽  
Grace Erandy Baez Hernandez ◽  
Monica Gamez Luque
Keyword(s):  
Chemical Composition ◽  
Quality Evaluation ◽  
Meat Products ◽  
Physicochemical Characteristics ◽  
Raw Material ◽  
Water Removal ◽  
Drying Process ◽  
Normal Range ◽  
Drying Curves

The objective of this research was to evaluate the performance and quality of three cuts of beef marketing low during the drying process for the preparation of meat crushes. quality (color, pH, aw, chemical composition) of beef cuts glove, neck and lizard cool and their behavior during drying (curves) and the quality of the finished product (color, pH, aw analyzed, chemical composition). Data were evaluated by analysis of variance via. Color and aw in the raw material were within the normal range, while the pH was varied from 5.92-6.45. In the chemical composition, the cut glove had higher moisture content (76.42%). Similarly, during drying, this cut, introduced least resistance for water removal, reaching the desired humidity (25-30%) in less time (240 min). With regard to the finished product, differences in physicochemical characteristics, mainly in color they were presented. The chemical composition, both moisture and protein were affected, which varied between the 24.65-28.09% and 51.70-53.65% respectively. The three cuts have assessed potential for the production of dried meat products, such as crushed and dried meat

scholarly journals Effect of cow cleanliness in different housing systems on somatic cell count in milk

2016 ◽  
Vol 85 (1) ◽  
pp. 55-61
Author(s):  
Wojciech Neja ◽  
Mariusz Bogucki ◽  
Małgorzata Jankowska ◽  
Anna Sawa
Keyword(s):  
Somatic Cell ◽  
Cell Count ◽  
Somatic Cell Count ◽  
Clinical Mastitis ◽  
The Body ◽  
Housing System ◽  
Body Parts ◽  
Housing Systems ◽  
Quality Of Milk

The aim of the study was to analyse the effect of the housing system (tie-stall vs free-stall) on cow cleanliness, and the effect of the degree of cow dirtiness on the milk somatic cell count. Over 33% of the cows were found to be clean, with more of them in the free-stall barn. Analysis of the cleanliness of body parts showed that the highest hygiene level was characteristic of the udders and underbelly (scores of 1 for 47% and 56% of the cows, respectively). In the free-stall barn, there were over twice as many cows with clean udders (58%) and almost twice as few cows with very dirty udders. Regardless of the housing system, the degree of udder dirtiness created differences (P ≤ 0.01) in the natural log somatic cell count. The natural log somatic cell count increased from 11.54 to 12.37 on average with increased dirtiness of the udder. Greater differences in the cytological quality of milk were found in cows housed in the free-stall system. When analysing the effect of overall dirtiness of the cows and the body parts on the percentage of SCC classes, it was found that highest quality milk (< 200 000 somatic cells/ml) was produced by clean cows (71.52%). The proportion of cows with subclinical and clinical mastitis was found to increase with decreasing cleanliness of the udder, especially in the free-stall system. Overall, the proportion of cows with clinical mastitis increased from 2.51% (clean cows) to 14.29% (dirty cows).

Sign in / Sign up

Export Citation Format

Share Document