scholarly journals Comparison of quality parameters of Czech and foreign hop varieties

2011 ◽  
Vol 49 (No. 6) ◽  
pp. 261-268 ◽  
Author(s):  
K. Krofta
Keyword(s):  
Quality Parameters ◽  
Separate Group ◽  
Hybrid Origin ◽  
Brewing Industry ◽  
Dual Purpose ◽  
Bitter Acids

Market varieties of hops are classified to several groups according to their use in the brewing industry – aroma, bitter (dual-purpose), high-alpha ones. Saaz and other genetically related varieties form a separate group among the aromatic hops. The group called fine aroma hops has a low content of a-bitter acids (3–4% w/w), its content of b-bitter acids is in the range of 4–7% w/w and cohumulone ratio in the interval of 23–26% rel. The composition of hop oils is characterised by the content of b-farnesene in the range of 15–20% rel. and trans-a-bergamotene at the amount of ca. 1% rel. Most market varieties of hops are of hybrid origin. It holds true about the Czech varieties Sládek, Bor, Premiant and Agnus. The content of a-bitter acids in bitter varieties is in the range of 7–10% w/w while the content of a-bitter acids in high-alpha hops is higher than 10% w/w.

scholarly journals Dual-Purpose Poultry in Organic Egg Production and Effects on Egg Quality Parameters

Foods ◽  
2021 ◽  
Vol 10 (4) ◽  
pp. 897
Author(s):  
Marianne Hammershøj ◽  
Gitte Hald Kristiansen ◽  
Sanna Steenfeldt
Keyword(s):  
Egg Production ◽  
Egg Quality ◽  
Quality Parameters ◽  
Egg Laying ◽  
High Yield ◽  
Meat Production ◽  
Dual Purpose ◽  
Shell Quality ◽  
Egg Shell ◽  
Genotype A

Egg laying genotypes have been selected for generations due to their high yield and egg quality, resulting in efficient feed utilization and low body weight; hence, they are not suitable for meat production. This imposes an issue for the male layer chicks, which are killed at one day old. Because of ethical and food waste concerns, the search for suitable dual-purpose genotypes in order to avoid euthanasia of male day-old chicks has intensified. The aim of the present study is to evaluate potential dual-purpose genotypes for their egg quality compared to a representative egg laying genotype. Three dual-purpose genotypes with divergent characteristics were evaluated: genotype A represented an experimental crossbreed based on a broiler type male and an egg layer female, genotype B was a pure breed, and genotype C was a crossbreed of a layer type. These were compared to a control genotype D, which was an egg layer. Eggs were collected six times during the period of 21–54 weeks of hen age, i.e., a total of 1080 shell eggs were analyzed. Examined parameters were weights of egg, shell, yolk, and albumen, by calculating their relative proportions. Shell quality was assessed by shell strength, shell stiffness, and shell thickness. Yolk quality was determined as yolk color and inclusions of blood and meat spots, and albumen quality was evaluated in terms of pH and dry matter (DM) content. The egg layer genotype produced the smallest eggs with least blood and meat spot inclusions compared to that produced by the three dual-purpose genotypes. Shell quality was superior for the layer genotype. However, the experimental genotype A laid eggs of comparable shell quality, albumen DM, and yolk weight, but also with the darkest and most red-yellow colored yolk. The two other dual-purpose genotypes produced eggs of low-medium quality. In conclusion, the genotype A could serve as dual-purpose genotype from an egg quality perspective.

scholarly journals Meat Quality Parameters and Sensory Properties of One High-Performing and Two Local Chicken Breeds Fed with Vicia faba

Foods ◽  
2020 ◽  
Vol 9 (8) ◽  
pp. 1052 ◽  
Author(s):  
Cynthia I. Escobedo del Bosque ◽  
Brianne A. Altmann ◽  
Marco Ciulu ◽  
Ingrid Halle ◽  
Simon Jansen ◽  
...  
Keyword(s):  
Vicia Faba ◽  
Meat Quality ◽  
Quality Parameters ◽  
Sensory Properties ◽  
Meat Production ◽  
Dual Purpose ◽  
Suitable Alternative ◽  
High Performing ◽  
Faba Beans ◽  
Chicken Breeds

The current practices of the poultry industry have raised concerns among consumers. Among these is the culling of day-old male chicks of laying hybrids; a suitable alternative for this could be the use of dual-purpose breeds where both sexes are used. Another practice that causes concern is the import of large quantities of soybeans for feedstuff production. Substitutes for these soybean-based products are regional protein crops, such as faba beans (Vicia faba L.; FBs). The objective of this study was to test the suitability of FB as a locally produced soybean meal replacement for two local dual-purpose chicken breeds and one high-performing layer line. The breast and leg meat of male Bresse Gauloise (BG), Vorwerkhuhn (VH), and White Rock (WR) animals was evaluated for different meat quality parameters: pH, color, water holding capacity, and tenderness. Sensory properties of the samples were evaluated by a trained panel with a conventional descriptive analysis. Results show different effects of FB diets on meat quality parameters in the different breeds. The attributes mostly affected by the diet are related to aroma, flavor, and texture, particularly in VH and WR. Overall, faba beans appear to be an acceptable dietary protein source for rearing these breeds for meat production.

scholarly journals Heterosis for quality parameters in direct and reciprocal crosses of dual purpose pigeonpea

2016 ◽  
Vol 7 (4) ◽  
pp. 1169
Author(s):  
H. K. Joshi ◽  
D. A. Chauhan ◽  
A.R. Pathak ◽  
Y.A. Viradiya
Keyword(s):  
Quality Parameters ◽  
Dual Purpose ◽  
Reciprocal Crosses

scholarly journals Evaluation of Caponization on Growth and Meat Quality Parameters of Dual-Purpose Chicken

2018 ◽  
Vol 6 (4) ◽  
pp. 339-343
Author(s):  
Tulasi Prasad Paudel ◽  
Bishwas Poudel ◽  
Damodar Neupane
Keyword(s):  
Meat Quality ◽  
New Hampshire ◽  
Quality Parameters ◽  
Quality Characteristics ◽  
Carcass Composition ◽  
Carcass Quality ◽  
High Quality ◽  
Dual Purpose ◽  
Mineral Profile

Caponization is a surgical technique that alters the sexual maturation of male chickens and improves quality characteristics of carcass and meat. The present experiment was conducted in order to evaluate the effects of caponization on body weight, carcass composition and meat quality of dual purpose chicken. A total of 48 dual-purpose breeds of Chicken, namely New Hampshire (NH) and Black Australorp (BA) were examined in a 2 × 2 factorial design each treatment having twelve birds till the age of 32 weeks. The results showed that the growth rate up until the age of 20 are not significant statistically which became significant afterwards (p<0.01). Likewise, some desirable changes in body morphology, carcass quality (p<0.05) and dressing out recovery were also observed. The hedonic ranking test also inferred that the meat from capons are liked by consumers highly significantly (p<0.01). The results of this study indicate that the caponized chicken can be used as a valuable material for production of high quality meat. Based on the overall results patterns and indication of this study, a more detailed study to minutely study the fatty acid, amino acid and mineral profile along with evaluation of the proper age at which caponization can bring about the most desirable changes should be lined up. Int. J. Appl. Sci. Biotechnol. Vol 6(4): 339-343

scholarly journals Influence of growing area, plant age, and virus infection on the contents of hop secondary metabolites

2012 ◽  
Vol 30 (No. 6) ◽  
pp. 541-547 ◽  
Author(s):  
L. Jelínek ◽  
M. Dolečková ◽  
M. Karabin ◽  
T. Hudcová ◽  
B. Kotlíková ◽  
...  
Keyword(s):  
Virus Infection ◽  
Secondary Metabolites ◽  
Essential Oils ◽  
Raw Materials ◽  
Plant Age ◽  
Brewing Industry ◽  
Bitter Acids

Hops and hop products (pellets and extracts) belong to the major raw materials employed in brewing industry. Many effects such as the growing area, hop plant age, and virus infection influence the contents of the brewing-important hop secondary metabolites (&alpha;- and &beta;-bitter acids, essential oils, and polyphenols). The clones of the Czech cultivars Saaz and German cv. Taurus were used in this work and compared with the aim to investigate the influence of the effects mentioned on the contents of hop secondary metabolites.

Monitoring of essential oils during storage by selected quality parameters

Planta Medica ◽  
2010 ◽  
Vol 76 (12) ◽  
Author(s):  
C Turek ◽  
S Ritter ◽  
F Stintzing
Keyword(s):  
Essential Oils ◽  
Quality Parameters

Creating adaptive predictions for packaging-critical quality parameters using advanced analytics and machine learning

TAPPI Journal ◽  
2019 ◽  
Vol 18 (11) ◽  
pp. 679-689
Author(s):  
CYDNEY RECHTIN ◽  
CHITTA RANJAN ◽  
ANTHONY LEWIS ◽  
BETH ANN ZARKO
Keyword(s):  
Machine Learning ◽  
Real Time ◽  
Predictive Analytics ◽  
Paper Industry ◽  
Quality Parameters ◽  
Fast Change ◽  
The Face ◽  
Model Tuning ◽  
Reducing Costs ◽  
Time Critical

Packaging manufacturers are challenged to achieve consistent strength targets and maximize production while reducing costs through smarter fiber utilization, chemical optimization, energy reduction, and more. With innovative instrumentation readily accessible, mills are collecting vast amounts of data that provide them with ever increasing visibility into their processes. Turning this visibility into actionable insight is key to successfully exceeding customer expectations and reducing costs. Predictive analytics supported by machine learning can provide real-time quality measures that remain robust and accurate in the face of changing machine conditions. These adaptive quality “soft sensors” allow for more informed, on-the-fly process changes; fast change detection; and process control optimization without requiring periodic model tuning. The use of predictive modeling in the paper industry has increased in recent years; however, little attention has been given to packaging finished quality. The use of machine learning to maintain prediction relevancy under everchanging machine conditions is novel. In this paper, we demonstrate the process of establishing real-time, adaptive quality predictions in an industry focused on reel-to-reel quality control, and we discuss the value created through the availability and use of real-time critical quality.

Sign in / Sign up

Export Citation Format

Share Document