Nowa wersja platformy, zawierająca wyłącznie zasoby pełnotekstowe, jest już dostępna.
Przejdź na https://bibliotekanauki.pl
Preferencje help
Widoczny [Schowaj] Abstrakt
Liczba wyników

Znaleziono wyników: 8

Liczba wyników na stronie
first rewind previous Strona / 1 next fast forward last
Wyniki wyszukiwania
help Sortuj według:

help Ogranicz wyniki do:
first rewind previous Strona / 1 next fast forward last
|
|
tom 46
|
nr 11
EN
The influence of residues in milk at the experimental concentrations detected by microbiological method of some sanitizing substances on the result of the Penzym test was evaluated. The following washing substances: Ixi, Michasia, Krasula and Mirax at concentrations 0.1—1.0% and disin­fectants: lime, Mastycyd, Incozan W, Chloramin T, chlori­nated lime, lime water at concentrations 0.2—1.0%, H202 at concentrations 0.025—1.0% and Chlorogen D at concentra­tions 0.08—0.5% and 1.0% were examined. These substances were used in the test separately or in an association with penicillin. It was found that Chloramin T, Ixi, Chlorogen D, Mastycyd, H202 and chlorinated lime afected the colour change in the Penzym test and hence these substances might be detected in the test. A false positive results are obtained when milk acidity is changes from pH 6.1. The residues of experimental concentrations i.e. 0.5% of Chlorogen D, 0.7% Chloramin T, 0.3% of chlorinated lime eliminated a possibility to detect 0.017 iu of penicillin/cm3. The microbiological test was free from this unsuitability. These preliminary experiments were done under laboratory conditions.
|
|
tom 46
|
nr 10
EN
There were compared microbiological indices of 20 milk raw materials taken at random from the large scale cowsheds and 20 samples from the stations of individual deliverers. The microorganisms were found in the amount of 32.5X10® and 17.5X10®/1 ml respectively. The titer of E. coli was 10—4 (40%h) or 10—2 (30%), enterococi 10~3 (75%), 10-3 (50%), and staphylococci in 90% and 65% of the samples. The higher number of acidophylic, caseolytic and psychrotrophic microflora was noted in the raw materials of individual deliverers. The results of microbiological examinations were not in agreement with the healthy state of cows from the large state farms. The control of mastitis showed that: a) 74.5% cows was free from udder diseases, b) 8.55% suffered from subclinical diseases and 14.5% from aseptic forms of mastitis. The yield of milk was increasing every year and it was 30531 in 1983 and 37691 in 1988. The results indicate that a lack of market mechanisms in respect to milk production does not influence profitably the effects of the control of mastitis in cows. The healthy state of udders in cows of individual farms expressed by positive Whiteside’s test was 85% and in the comparable group — 40%.
|
|
tom 44
|
nr 03
RU
Прменяя Быстрой диффузионный критерий (БДК) для обнаруживания остатков антибиотиков в молоке с тестовым штаммом В. stearothermophilus v. calidolactis С. 953, исследовали 1582 пробы дольного молока 405 коров из 8 производственных стад. Отметили 241 мнимо положительную реакцию (15,2%), коrорые отнесли к наличию натуральных биологических тормозящих веществ в молоке (нбтв). После вскипячения получили 41,5% мнимо положительных результатов. Применяя для БДК сборное молоко от многих коров, получили отрицательные результаты. Показали, что вскипячение полностью элиминирует нбтв в разбавлении 1:4, а почти полностью в 1:2. Из исследований вытекает, что не следует применять в обнаруживании тормозящих веществ в молоке дольного секрета, а лишь сборное молоко. Вскипячение проб меритюрически не умотивировано.
EN
Using the rapid diffusion test (STD) for discovering antibiotics residues in milk there were examined 1582 samples of lobular milk by means of B. stearothermophilus v. calidolactis. C.953. The samples were taken from 405 cows of 8 herds. There were found 241 false positive reactions (15.2%) due to natural biological inhibitory substances (NBIS). After boiling 41.5% of false positive reactions were noted. Collective milk coming from many cows gave negative results employing the rapid diffusion test. It was stated that boiling eliminated NBIS entirely in a dilution of 1:4 and almost completely in a dilution of 1:2. The findings showed that only collective milk and not milk of lobular secretion should be taken in order to discover inhibitory substances; boiling did not influence the results.
first rewind previous Strona / 1 next fast forward last
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.