scholarly journals The performance testing of boars I. Performance testing on Finnish experimental stations and genetic and environmental influences on test results

1971 ◽  
Vol 43 (1) ◽  
pp. 53-62
Author(s):  
Elsi Ettala
Keyword(s):  
Growth Rate ◽  
Feed Efficiency ◽  
Performance Testing ◽  
Live Weight ◽  
Correction Factors ◽  
Test Results ◽  
Genetic Quality ◽  
Effect Of Age ◽  
Selection Of

In 1965 performance testing was initiated in Finland for the selection of boars for A.I. use. In 1965—68 a total of 147 boars were tested on four local testing stations. The following average results were recorded: backfat thickness 21.6 mm (at a live weight of 88 kg), growth rate 699 g/day, feed efficiency 2.69 scand. fu/kg growth and testing score (growth + fat) 99.6. The average testing score for boards selected for A.I. use (43 % of tested) was 99.7. Weakness of the legs was noted in 21 % of the boars. The varying initial weights of the male piglets influenced the growth rate very markedly (P < 0.001), and the effect of the initial age was significant with respect to feed efficiency (P < 0.01). The influence of the weight and age at end of test was highly significant with regard to thickness of fat (P < 0.001). Moreover, the weight at end of test affected the testing score significantly (P < 0.001), but the effect of age was eliminated by use of correction factors. The years as well as the testing stations influenced most of the results in a significant manner. The thickness of fat for the Yorkshire boars was significantly greater (P < 0.01) than for the Landrace boars and the former also had a significantly lower testing score. The effect of the genetic variation, influence of sires within breeds, was highly significant (P < 0.001) for all test results. It has thus proved possible to estimate the genetic quality of the boars. The different influences on the test results were analyzed by least squares procedures.

THE EFFECTS OF SEX AND AGE OF MALE AT CASTRATION ON GROWTH AND CARCASS QUALITY OF YORKSHIRE SWINE

1961 ◽  
Vol 41 (1) ◽  
pp. 30-39 ◽  
Author(s):  
L. A. Charette
Keyword(s):  
Growth Rate ◽  
Iodine Number ◽  
Feed Efficiency ◽  
Carcass Characteristics ◽  
Live Weight ◽  
Carcass Quality ◽  
Selection Of ◽  
Effect On Growth

The effects of sex and age of castration of males on growth rate, feed efficiency and carcass characteristics in bacon type swine were measured using 16 pigs each as gilts, entire boars, and boars castrated at birth, 6, 12, 16, and 20 weeks of age. Castration at 20 weeks was too late since some pigs reached 200 pounds live weight before that age. Boars consumed less feed daily than barrows and gilts, were thinner in loin fat, and yielded a higher percentage of shoulder than gilts. The carcasses of boars and gilts were longer, had less fat covering over the shoulder and back, a larger area of loin, and a higher iodine number than those castrated late. Acceptability tests showed that sex or age of castration did not affect the flavour, odour, or tenderness of the meat.Purebred breeders can delay castration for better selection of boars without any serious effect on growth, physical carcass characteristics, and feed requirements. Although the market discriminates against boars, it appears questionable whether castration is necessary when boars are slaughtered at 200 pounds before they reach the age of 150 days.

Selection of dairy cattle for growth rate and milk production

1966 ◽  
Vol 8 (1) ◽  
pp. 109-119 ◽  
Author(s):  
M. Soller ◽  
R. Bar-Anan ◽  
H. Pasternak
Keyword(s):  
Growth Rate ◽  
Milk Production ◽  
Economic Value ◽  
Performance Testing ◽  
Live Weight ◽  
Economic Conditions ◽  
Progeny Testing ◽  
Genetic Progress ◽  
Weight For Age ◽  
Selection Of

The genetic progress in live-weight-for-age (LFA), milk production, and in overall economic value expected as a result of performance and progeny testing of young bulls with respect to milk production and LFA was computed. It was shown that performance testing can contribute considerably to overall progress in economic value, while under certain circumstances progeny testing for LFA can also contribute to genetic progress in overall economic value, but to a lesser degree than performance testing. The relative economic value of LFA and milk production was derived and found to be relatively stable under differing economic conditions.

scholarly journals Improved in situ performance testing of line-concentrating solar collectors: Comprehensive uncertainty analysis for the selection of measurement instrumentation

2016 ◽  
Author(s):  
Annie Zirkel-Hofer ◽  
Stephen Perry ◽  
Sven Fahr ◽  
Korbinian Kramer ◽  
Anna Heimsath ◽  
...  
Keyword(s):  
Performance Evaluation ◽  
Performance Testing ◽  
Evaluation Procedure ◽  
Test Results ◽  
Solar Collectors ◽  
Further Development ◽  
Testing And Evaluation ◽  
Selection Of

Accurate and complete performance evaluation is playing a major role in the further development of concentrating solar collectors. To ensure dependable test results, an appropriate testing and evaluation procedure is required. Moreover, the selection and installation of suitable  measurement instrumentation are essential for obtaining reliable data for the performance evaluation. The quality of the measurement instrumentation greatly influences the representativeness of the test results. Details on the measurement instrumentation recommended for the testing of low-temperature solar collectors have already been provided in the testing standard EN ISO 9806:2013.

Implementasi Voip Server Berbasis IPV6 Dengan Raspberry PI

2019 ◽  
Vol 9 (01) ◽  
pp. 47-54
Author(s):  
Rabbai San Arif ◽  
Yuli Fitrisia ◽  
Agus Urip Ari Wibowo
Keyword(s):  
Internet Protocol ◽  
Wireless Transmission ◽  
Raspberry Pi ◽  
Test Results ◽  
Average Delay ◽  
Ipv6 Network ◽  
Ip Network ◽  
Selection Of ◽  
Better Than

Voice over Internet Protocol (VoIP) is a telecommunications technology that is able to pass the communication service in Internet Protocol networks so as to allow communicating between users in an IP network. However VoIP technology still has weakness in the Quality of Service (QoS). VOPI weaknesses is affected by the selection of the physical servers used. In this research, VoIP is configured on Linux operating system with Asterisk as VoIP application server and integrated on a Raspberry Pi by using wired and wireless network as the transmission medium. Because of depletion of IPv4 capacity that can be used on the network, it needs to be applied to VoIP system using the IPv6 network protocol with supports devices. The test results by using a wired transmission medium that has obtained are the average delay is 117.851 ms, jitter is 5.796 ms, packet loss is 0.38%, throughput is 962.861 kbps, 8.33% of CPU usage and 59.33% of memory usage. The analysis shows that the wired transmission media is better than the wireless transmission media and wireless-wired.

The effect of a milk diet uponPlasmodium berghei, Nuttallia (=Babesia) rodhainiandTrypanosoma bruceiinfections in mice

Parasitology ◽  
1970 ◽  
Vol 61 (3) ◽  
pp. 425-433 ◽  
Author(s):  
Frank Nowell
Keyword(s):  
Growth Rate ◽  
Normal Diet ◽  
Normal Strain ◽  
Fatality Rate ◽  
Milk Diet ◽  
Infection Pattern ◽  
Selection Of

Suppression ofP. bergheiinfections but not those ofN. rodhainiorT. bruceiin mice on milk diet were noted. The suppression ofP. bergheiwas variable. This was not due to differences of the quality of the milk or to the mice eating faeces, sawdust, etc. which may be rich in PABA. The variability was at least partially due to selection of a strain of parasite probably requiring a lower level of PABA than normal. One such strain was isolated and its pattern of infection compared with the normal strain. The ‘milk diet’ strain caused a higher fatality rate in mice on milk diet but always showed a lower parasitaemia growth rate in mice on normal diet. When repassaged through mice on normal diet, the ‘milk diet’ strain did not revert immediately to the infection pattern of the normal strain.

scholarly journals Effect of age upon utilisation of iron in chickens

2011 ◽  
Vol 49 (No. 9) ◽  
pp. 407-410
Author(s):  
E. Fajmonová ◽  
J. Zelenka ◽  
K. Holendová
Keyword(s):  
Growth Rate ◽  
Live Weight ◽  
The Body ◽  
Fast Growing ◽  
Fe Content ◽  
Weight Gains ◽  
Iron Retention ◽  
Ad Libitum ◽  
Effect Of Age ◽  
Meat Type

The effect of age upon iron retention in cockerels of laying and meat type hybrids was examined within 46 subsequent balance periods. Chickens were fed ad libitum a diet with the content of 312 mg Fe per 1 kg. The dependence of Fe utilisation upon age from Day 3 to Day 100 was expressed by the second degree parabolas with minimum values in the tenth week of age. The dependence of Fe content in weight gains on age was highly significant (P &lt; 0.01). The course of this dependence was expressed by parabolas with minimum values on Day 38 and Day 28 in slow and fast growing chickens, resp. The growth rate of total amount of Fe in the body was by 6&nbsp;per cent lower (P &lt; 0.01) than that of live weight of chickens. &nbsp; &nbsp;

scholarly journals Selected Issues Concerning Degradation of Material in the Production of Injection Molded Plastic Components

2016 ◽  
Vol 10 (3) ◽  
pp. 173-180
Author(s):  
Marek Jałbrzykowski
Keyword(s):  
Thermal Characteristics ◽  
Test Results ◽  
Base Materials ◽  
Plastic Materials ◽  
Technological Quality ◽  
Injection Molded ◽  
Plastic Components ◽  
Injection Molded Plastic ◽  
Selection Of

Abstract This paper presents the problem of thermal degradation of thermoplastic materials processed using the injection method. Attention was paid to the issue of the optimal selection of a dye for modifying the base materials. For the selected materials and dyes, derivatograph tests were performed in order to assess their thermal characteristics and breakdown kinetics. Additionally, tribological tests and microscope observations of selected samples were performed. The obtained test results suggest a diverse level of thermal processes in the analyzed materials. This is crucial for the appropriate selection of dyes for plastic materials. As it turned out, the tribological properties of materials can also influence the technological quality of the injected alloy.

scholarly journals Performance and carcass quality of Czech Fleckvieh, Charolais and Charolais × Czech Fleckvieh bulls fed diets based on different types of silages

2008 ◽  
Vol 52 (No. 9) ◽  
pp. 269-276 ◽  
Author(s):  
L. Bartoň ◽  
V. Kudrna ◽  
D. Bureš ◽  
R. Zahrádková ◽  
V. Teslík
Keyword(s):  
Feed Efficiency ◽  
Dry Matter ◽  
Live Weight ◽  
Experimental Period ◽  
Average Weight ◽  
Dietary Energy ◽  
Maize Silage ◽  
Different Types ◽  
Entire Experiment

A total of thirty-four Czech Fleckvieh (CF), Charolais (CH) and Charolais × Czech Fleckvieh (CH × CF) bulls with an average weight of 284 kg were included in the experiment and fed ad libitum two mixed diets: MS (based on maize silage) and LCS (based on legume-cereal and lucerne silages) with different concentrations of dietary energy until slaughter at the target live weight of 600 kg. The CF bulls consumed more dry matter (DM) of feed daily than the CH bulls (<i>P</i> < 0.05) and gained weight less efficiently than the CH × CF and CH animals (<i>P</i> < 0.01) during the entire experiment. The killing-out percentage was lower in the CF than in the CH × CF and CH (<i>P</i> < 0.05). The CH bulls received a higher score for carcass conformation and a lower score for carcass fatness (<i>P</i> < 0.01) than the CF bulls, had lower proportions of kidney and cod fat (<i>P</i> < 0.01) than the CH × CF and CF bulls, and produced the highest percentage of high-priced meat (<i>P</i> < 0.05) and the lowest percentage of separable fat (<i>P</i> < 0.001). The bulls on the MS diet were younger than the others at the end of the experiment (<i>P</i> < 0.01), gained weight more rapidly (<i>P</i> < 0.001), consumed less DM (<i>P</i> < 0.001) daily, utilized nutrients more efficiently over the entire experimental period (<i>P</i> < 0.001), and had a higher proportion of internal fat than the LCS bulls. It can be concluded that purebred CH bulls were superior to the other breed groups in most of the traits observed. The intensive diet based on maize silage increased average daily gains, reduced the time needed to achieve the target slaughter weight, and improved the feed efficiency of bulls.

Fast Electroless Ni-P Coating on AM60 Magnesium Alloy at Low Bath Temperature

2011 ◽  
Vol 418-420 ◽  
pp. 756-759 ◽  
Author(s):  
Guo Bing Mao
Keyword(s):  
Growth Rate ◽  
Corrosion Resistance ◽  
Magnesium Alloy ◽  
Magnesium Alloys ◽  
Electroless Plating ◽  
Corrosion Test ◽  
Bath Temperature ◽  
Test Results ◽  
Electroless Ni

The Ni-P coatings were deposited on AM60 magnesium alloy by electroless plating process without or with accelerators. Without accelerators, the deposition rate is slow and required high bath temperature to obtain compact coating. There have many defects on the surface of the Ni-P coatings which deposited at high bath temperature. The composite accelerators were introduced into the bath for improving the growth rate and the quality of the Ni-P coating. Uniform, with no pores or cracks, “cauliflower-like” structure and complete Ni-P coatings were deposited only taken 20 min with additives at low bath temperature. The XRD result indicates that the structure of the Ni-P coating is amorphous nickel. The corrosion test results indicated that the corrosion resistance of this coated AM60 magnesium alloys increases distinctly as compared to bare alloys.

scholarly journals Effects of ewe live weight and age on reproductive performance, lamb growth, and survival in Central Anatolian Merino sheep

2015 ◽  
Vol 58 (2) ◽  
pp. 451-459 ◽  
Author(s):  
A. H. Aktaş ◽  
Ş. Dursun ◽  
Ş. Doğan ◽  
Z. Kiyma ◽  
U. Demirci ◽  
...  
Keyword(s):  
Growth Rate ◽  
Reproductive Performance ◽  
Birth Rate ◽  
Live Weight ◽  
Fertility Rate ◽  
Multiple Birth ◽  
Growth And Survival ◽  
Merino Sheep ◽  
Lamb Growth ◽  
Selection Of

<p><strong>Abstract.</strong> The aim of this study was to evaluate the effects of premating ewe weight and age on ewe reproductive performance, lamb growth and survival in Central Anatolian Merino (CAM) sheep. <br><br> The trial included 4935 ewes and 5548 lambs from 23 breeder flocks in Eskişehir Province. The live weights (LWs) and ages of the ewes were recorded 1 week before the mating season. The number of lambs born, fertility rate, multiple birth rate (MBR), and lamb survival rate (SR) at days 75 and 120 were determined. The effects of the LW and age of the ewe were found to be important for the reproductive performance of ewes and for the lamb's growth rate (<i>P</i> < 0.05–0.001). Ewe MBRs and the birth weight (BW) and LW of the lambs at days 75 and 120 increased proportionally with the increase in LW in ewes prior to mating. The fertility rate and MBR were lower (<i>P</i> < 0.05–0.001) in 1.5-year-old ewes than in older ewes. However, lambs' SR at days 75 and 120 were not affected by the premating LW and age of the ewe. In summary, a better reproductive performance and lamb growth rate in CAM flocks may be achieved by the selection of breeding ewes from ewes weighing more than 60 kg.</p>

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