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Biomedical subjects

I Iliev

Publications and source records attributed to I Iliev.

35 records · Page 2Linked to original sources
PubMed1985

[Nature of animal husbandry in the community systems and the administrative and legal status of the veterinary medical services in agroindustrial complexes].

A characteristic is given of the public, private, and auxiliary system of animal breeding within the structure of the community systems. Important integrational links are stated to exist between these three categories of farms. On the base of the contractual system with private animal breeding a solid trend concerning the stock production seems to be established. In connection with the new character of animal husbandry the changes that have taken place in the territorial community structure and the implementation of the system of providing the supply of meat, milk, eggs, and fish of own resources have substantiated the necessity to stabilize the administrative and juridical statute of the veterinary service on the agro-industrial complexes with a view to guaranteeing the more effective veterinary service with all categories of farms. A suggestion is made to transfer the veterinary establishments from the agro-industrial complexes to the community systems, with responsibilities and rights of their own for the entire and dependable veterinary service in aid of the community systems.

Animal Husbandry↗
PubMed1983

[Labor expenditure from the viewpoint of work standardization and planning for veterinary specialists in meat-packing combines].

A functional analysis and investigation was carried out on the character of labour input of vets responsible for the veterinary and sanitary control in the field of meat production and processing at five meat combines of variable volume of production and equipped with different technical means. Photos and self-photos of the working time and chronometric studies were made to find the amount of work done by vets for the specific types of activity. Investigations showet that all veterinary types of work guaranteeing an overall veterinary and sanitary control on the animals and products derived from them, including the keeping of specific veterinary records required 10 min. for a large animal, 4.8 min. for a swine, and 2.6 min. for a small ruminant. On the basis of these time-consuming norms labour stansardization and normatives for the number of persons engaged in the veterinary service responsible for the veterinary-and-sanitary control in the meat-producing combines were worked out.

Bulgaria↗
PubMed1982

[Ratio between lactating and dry periods in cows differing in milk yield and duration of the period between calving].

A study was carried out on the duration of the lactation period at different milk yield values and variable duration of the calving interval. It was found that the time period of lactation was influenced by the calving interval and the amounts of milk obtained. When the calving period was more than 365 days there was an unproportional lengthening of the lactation period which led to the respective lengthening of the dry period of cows. One day lengthening of the calving period brought about an increase of the dry period by 0.3 to 0.4 days. In the groups where milk yields amounted up to 4000 1 per cow the relative share of animals whose lactation period was below the standard was higher as compared to the groups with milk yields amounting over 4000 1 per cow. The higher the milk yield the higher the number of cows whose lactation period was within the norm. However, what is commonly observed is that with most of the cows the lactation period is below the standard, and this substantiates the fact that considerable amounts of milk are not really obtained.

Animals↗
PubMed1982

[Differences in the milk yield with reference to the standard and factual duration of lactation in different lengths of the calving period].

Attempt is made to elucidate and evaluate the difference in the milk yield on a total and per day basis during the calving period at both actual and standard lactation period. It was found that at duration of the calving interval that was admittedly shorter than the standard -- 365 days -- the cows had shorter lactation period than the standard one. At duration of the calving interval of 360 to 370 days (365 days on a average) which is standard for this country none of the groups of cows reached the normative duration of the claving period in terms of milk-yielding capacity. This was better expressed also with the lengthening of the calving period over 365 days. When the cows fail to reach the standard (normative) duration of the lactation period considerable amounts of milk are presumably lost -- for 300 days of lactation, -both for the lactation period as a whole and for each single day of the calving period.

Animals↗
PubMed1980

[Essence of scientific and technical achievements and the nature of the effect of veterinary medical research].

An attempt is made at elucidating the essence of veterinary scientific and technological achievements and the character of the effect of their implementation. On the basis of a structural analysis veterinary scientific investigations are grouped as: theoretical-fundamental, scientific-applicative and scientific-technological elaborations. Starting out from the character of the effect that is achieved through their application, the scientific works, as well as the scientific and technological achievements in the field of veterinary medicine, are categorized as follows: cognitive (New knowledge), technical and technological (medico-biological), socio-sanitary, economic and those having a mixed effect (cognitive- medico-biological, medico-biological-socio-sanitary, socio-sanitary and economic, etc. The identification of the various types of effects requires the elaboration of respective criteria, as well as a system of indexes for their characterization, a qualitative and a quantitative determination, as necessary conditions for determining the effectiveness of research veterinary works and that of research technological achievement.

Research↗
PubMed1976

[Method for computing the milk losses from sterility in cows].

An attempt was made to work out a method and establish the indices in calculating the losses of milk due to sterility in cows, along with recording the level of productivity and the duration of the period of sterility. The differences were established between: 1. The size of the average daily milk yield per normative day (a day of the period between calvings of 365 days) and that per day of the actual period between calvings. 2. The average daily milk yield per normative day and that per day of the period of sterility. The milk losses calculated in both ways gave almost comparable results. It is , therefore, suggested when calculating the losses due to sterility to use the established indices of milk losses per sterility day (Table 2) at a varying milkiness of the cows and a varying length of the period between calvings, resp., the period of sterility.

Animals↗
PubMedDate not supplied

Automatic adjustment of biphasic pulse duration in transthoracic defibrillation.

Many studies have proven that biphasic defibrillation pulses are more efficient than the damped sinusoid monopolar waveform. Transthoracic resistance was shown to change during the two phases. On the other hand, it was proven that transthoracic resistance plays an important role in the defibrillation process, yielding the current for selected energy or voltage. Pre-shock measurement of the resistance may lead to improved selection. Stabilized current defibrillators are of low stored-to-delivered energy ratio. Therefore, automatic dynamic adjustment of some defibrillator parameters with respect to transthoracic resistance changes seems rational. An approach is known for modifying the pulse duration, in order to deliver a selected energy. A method is proposed here and an experimental defibrillator is developed for dynamic pulse duration adjustment with the purpose of obtaining a desired optimal time-course of the cardiac cell transmembrane potential.

Animals↗