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Biomedical subjects

M Prinz

Publications and source records attributed to M Prinz.

65 records · Page 4Linked to original sources
PubMed1981

[Vitamin A requirement of fattening turkeys. 1. Vitamin A requirement of fattening turkeys under conditions of intensive rearing on the ground].

In two experiments with a total of 2,250 fattening turkeys at VEB KIM Turkey and Goose Production Gühlen-Glienicke graded doses of vitamin A (0...20,000 I.U./kg feed) in a ration type poor in vitamin A and carotene were tested in dependence on sex. After a 20-day depletion period the vitamin A supplement of 0, 125 and 250 I.U.vitamin A/kg feed resulted in vitamin A deficiency symptoms after feeding this ration for 1 week. A supplement of between 500 and 1,000 I.U. vitamin A/kg feed diminished consumption in some cases significantly. On the basis of parameters of the fattening performance and of the vitamin A content of the liver it could be proved that the optimal growth of the male and female animals requires approximately 2,000 I.U. and the adequate storage of vitamin A in the liver approximately 5,000 I.U./kg feed. The requirements are fulfilled by the current supplements of the mixed feed for fattening turkeys kept intensively on the ground.

Adipose Tissue↗
PubMed1980

Asbestos as a cofactor in carcinogenesis among nickel-processing workers.

It has been widely assumed, especially in the absence of other explanations, that lung cancer and nasal sinus cancers observed among nickel smelter workers are the result of the carcinogenicity of nickel. Although there may be such influence, supplementary hypotheses are also possible. The nickeliferous ores from at least one major smelter in New Caledonia (excess numbers of cancers have been found in these smelter workers) are derived from serpentinized host rocks which contain large amounts of chrysotile asbestos. Analysis indicates that nickel ores from this area are heavily contaminated by these fibers. The deposits are mined for their nickel content, but workers may be exposed to the asbestos fibers contained in the deposits. Hygiene measures limited to the avoidance of nickel may be inadequate under such circumstances and should be reevaluated so as to prevent the inhalation of asbestos-containing dusts.

Humans↗
PubMed1980

[Requirements of turkeys kept on the ground with respect to energy and crude protein content of mixed feeds].

In four experiments with 9,500 turkeys assorted according to sex, three energy levels (500, 550 and 600 EFh (energetic feed units for hens = 14,6 kJ net energy body fat of hens)/kg feed) were combined with three levels of crude protein (250, 300 and 350 g/kg feed) in the mixed feed (9 rations) and tested under conditions of keeping the turkeys on the ground from hatching to their 42nd day of life. The feed consumption of the turkeys did not correlate with the energy content of the mixed feed. The energy consumption of the groups whose mixed feed had a high energy content (550 and 600 EFh) was significantly higher than that of groups whose feed had a low energy content. With the increasing content of crude protein in the mixed feed the consumption of crude protein per turkey and test period rose significantly. Due to the increase of the content of energy and crude protein, the live weight gain increased after a 28- and 42-day test period; the growth-stimulating effect was more distinct with male animals. Mortality had no connections with nutrition. For the starting-off feed for turkeys an energy content of < 580 EFh with 300 g crude protein per kg mixed feed up to the 4th/5th week of life is recommended.

Animal Feed↗
PubMed1978

[Energy and crude protein requirements of young fattening geese. 2. Inluence of varying energy and crude protein contents of feed on carcass quality].

In 5 trials using a total of 5,7000 geese (Deutsche Legegans maleXWhite Italian Goose female) of which 482 were slaughtered and subsequently dressed, the influence of varying net energy and crude protein levels in the ration on fattening and carcass performance were studied. Increased crude protein contents were found to improve the meat yield. High-energy feeding likewise caused gains to go up, the extra gain almost exclusively consisting in adipose tissue (particularly skin, and intestinal and abdominal fat). In addition, high energy intakes induced earlier juvenile moulting, this effect making the 56-day old carcasses rather bristly. Therefore, it seems more convenient to fatten geese on low-energy rations (500 energetic feed equivalents/poultry [EFp] per kg) up to the age of 63 days because the meat yield (especially of breast meat) is likely to improve considerably when slaughter takes place at a later date. Goose fattening rations should stick to the following parameters (per kg): 500--550 EFp, 160--180 g crude protein, 8 g lysine, 6.5 g thio-amino acids.

Animal Feed↗
PubMed1978

[Studies on the vitamin requirement and vitamin supply in fattening turkeys. 2. Checking the vitamin supplements to state-approved mixed animal feed for fattening turkeys].

In turkey fattening experiments, the vitamin A, vitamin D3, vitamin B6, vitamin B12, niacine, pantothenic acid, folic acid, biotine and choline chloride additions to mixed feeds for fattening turkeys were checked. The vitamin A requirement of the fattening turkey is met, in all stages of growth, by adding 3,000 I.U./kg feed. For vitamin D3 the necessary supplements are 1,000 and 500 I.U./kg for starter feed and fattening mixes, respectively. The requirements for vitamins B2, B6, B12, niacine, pantothenic acid, folic acid and biotine of the fattening turkey are covered by the respective amounts contained in the ration components. To ensure adequate choline supply (optimum gain, small losses) during the starter period, the addition of 500 mg/kg feed proved necessary. On the basis of the results presented, recommendations are given for requirement norms and mixed feed supplementation that have been fully implemented in the meantime.

Animal Feed↗
PubMed1977

[Requirements of Muscovy ducks (Cairina moschata domestica) for crude protein and energy levels of fattening diets].

Groups of male and female Cairina ducks subjected to equal starter feeding (1st to 3rd weeks) were used from the 4th week of live (fattening period) to test feed mixes of varying energy and crude protein levels (480 energetic feed equivalents/heu[EFH] - 140 g crude protein[CP]; 480 EFh - 180/g CP; 555 EFh - 140 g CP; 555 EFh - 180 g CP; 625 EEh - 140 g CP; 625 EFh - 180 g CP - all figures referred to 1 kg of feed). The different energy levels remained without influence of the live weight development. High-energy feed caused, however, higher expenditures of energetic feed equivalents per kg of gain and resulted in carcases with higher fat proportion. At all the 3 energy levels under study, high-protein feeding proved superior to low-protein rations with regard to live weight gains and meat yield. For the time being, 500 EFh and 180 g CP per kg of organic matter are recommended as indicators for Cairina duck fattening rations.

Animal Feed↗
PubMedDate not supplied

Genetic variation of the amplified VNTR polymorphism COL2A1 in Chinese and German populations.

The amplifiable VNTR polymorphic system COL2A1 has been investigated in Chinese and German population samples. In order to accurately identify COL2A1 alleles, a number of human allele ladders were prepared. A total of 14 different alleles in 23 genotypes was observed in the Chinese population, while in the German population there were 11 alleles in 24 genotypes. Four new alleles were observed. All of them were found in the Chinese and one was also observed in the German population. There was no statistical difference in the allele distribution between two German populations from Münster and Köln, while the allele frequency distribution in the Chinese population differed significantly from the German.

Alleles↗
PubMedDate not supplied

[Possibilities of DNA sex determination in hair roots].

Species- and sex-determination on hair roots were simultaneously performed using extracted DNA and a human Y chromosomespecific probe. (pH Y 2.1) After Southern hybridization, Hae III-digested DNA fragments were detected by non-radioactive digoxigenin detection system. DNA was extracted from one to five freshly plucked hair roots. The specific 2.12 kb fragment was successfully detected in male DNA samples from a single hair root. A positive identification of female DNA was more difficult. The hair root DNA was revealed to be stable at room temperature for at least 2 weeks (examination time) and produced the same specific band pattern as the DNA of fresh hair roots. In the blind tests with DNA samples from randomly plucked one to four hair roots, the rate of successful sex-determination was 95.8% on male samples (23 out of 24 samples) and 25% on female samples (4 out of 16 samples).

DNA Probes↗
PubMedDate not supplied

[Corpse dismemberment with sequential identification and classification of body parts].

In the reported case of criminal dismembering of a corpse the preservation in vinyl-bags allowed seven years after murder, to find out if the body parts fitted to those which were detected years ago. Furthermore, it was possible to find out the presumed cause of death, the morphologic characteristics of the injuries caused by stabbing with a single edged tool and successful DNA typing by PCR amplification for identification of the body parts and for interpretation of the biological stains from the crime scene.

Blood Grouping and Crossmatching↗