179 research outputs found
Utjecaj promjena sastojaka na kvalitetu mlijeka
Po svome sastavu mlijeko predstavlja jedan kompleksan fiziÄko-kemijski sistem u kome se sastojci mlijeka nalaze u odreÄenoj ravnoteži. Svaka promjena pojedinih sastojaka mlijeka utiÄe na odreÄeni naÄin na kvalitetu, njegovu tehnoloÅ”ku i prehrambenu vrijednost
ZnaÄaj i problemi u proizvodnji topljenih sireva
PolazeÄi od Äinjenice da proizvodnju topljenog sira po svom znaÄaju karakterizira niz elemenata, opravdano je Å”to se danas u suvremenoj mljekarskoj industriji topljeni sir može ubrajati u važne mlijeÄne artikle prometa na tržiÅ”tu
CORRELATION OF TUMOUR SUPPRESSOR GENE P53 EXPRESSION WITH MACROSCOPIC MANIFESTATION AND GROWTH PATTERN OF COLORECTAL CANCER
Colon carcinoma is one of the most common malignant tumours and the second cause of cancer-related deaths in developed countries.The objective of the research was to investigate the p53 expression in colorectal cancer and compare the expression levels of p53 with the macroscopic appearance and manner of growth of the tumours, followed by detection and identification of the expression levels of p53 as an important prognostic factor of the further course, outcome and data for the selection of appropriate therapy.Research was implemented as a prospective, clinical and experimental study. We used a postoperative material obtained by resection of colorectal cancer from 63 patients of both sexes.The results showed that the majority of tumours 36/63, i.e. 57.1% were manifested as infiltrative forms, 9/63, i.e. 14.3% as ulcerating form, and 18/63, i.e. 28.6% of tumours had a polypoid ā exophytic form.The results have shown that three tumours of infiltrative forms were p53 negative and 17 of them were p53 positive. In tumours with ulcerating form, eight were p53 negative, and 16 of them were no p53 positive tumours. In vegetative tumour forms, four were p53 negative, and 15 of the were p53 positive.Positive p53 status was present in 52.4% of tumours. Expression of p53 was absent in 47.6% of the tumours and does not correlate with the macroscopic appearance and manner of tumour growth. Expression levels of p53 do not have a diagnostic, predictive and prognostic potential, while its importance is undeniable in the understanding of oncogenesis
Neke karakteristike kvalitete sitnog sira na beogradskom tržiŔtu
U toku posljednjih nekoliko godina beogradsko tržiÅ”te je dosta dobro snabdjeveno sirovima kako u pogledu koliÄina tako i u pogledu asortimana. Å iri asortiman sireva najviÅ”e je zastupljen u specijaliziranim prodavnicama i u veÄim samoposlugama. Snabdjevanje ovih prodavnica vrÅ”i se preko trgovaÄke mreže koja se povezuje sa sirarskim industrijskim pogonima u raznim krajevima naÅ”e zemlje, a za pojedine vrste sireva i sa kooperativnim organizacijama
Prilog poznavanju polimorfizma kazeina u kravljem mlijeku
Proteini mlijeka privlaÄe veliku pažnju mnogih istraživaÄa veÄ viÅ”e desetljeÄa. Rezultati ovih ispitivanja koriste potpunijem upoznavanju proteina ili su od interesa za rjeÅ”avanje drugih istraživaÄkih problema
Neke izmjene u izradi somborskog sira kao prilog poboljŔanju kvalitete
Somborski sir je domaÄa vrsta sira, koja se odlikuje posebnom tehnologijom i osobinama. Najprije se poÄeo proizvoditi u okolini Sombora, a kasnije se njegova proizvodnja proÅ”irila i na neke druge krajeve
Sterilizirano mlijeko
Mlijeko je veoma važna hrana za Äovjeka, a ujedno i pogodna sredina za mikroorganizme (koji u mlijeko mogu dospijevati od momenta muže i u toku dalje manipulacije). Stoga se pred mljekare postavlja kao osnovno: saÄuvati mlijeko u ispravnom stanju za duže vrijeme
GM uljana repica tolerantna na herbicide-uticaj na životnu sredinu i poljoprivredu
The introduction of genetically modified herbicide tolerant rapeseed has raised questions concerning the possible transfer of transgenes into wild relatives or neighbouring fields with similar crops. Pollen of rapeseed can be spread in the area and if a non-GM crop is fertilised by GM pollen, some percentage of the collected seed product will contain GM. Current regulation in the EU limits the allowed content. For conventional crops the critical level of GM contamination is in practice below 0.9%, which is the threshold value for labelling of GM in food and feed by the EU, although the limit for seeds is 0.1% in Serbia. In organic farming, the regulations do not allow the use of genetic engineering in the grain production system.UvoÄenje genetski modifikovane uljane repice koja je otporna na herbicide nameÄe pitanja u vezi sa potencijalnim prenoÅ”enjem transgena sa genetski modifikovane uljane repice na njene divlje srodnike ili susedna polja sa sliÄnim kulturama. Polen uljane repice Å”iri se u prostoru, te ukoliko je genetski nemodifikovan usev oploÄen genetski modifikovanim polenom, odreÄeni broj biljaka biÄe genetski modifikovan. VažeÄa zakonska regulativa u Evropskoj uniji ograniÄava dozvoljen sadržaj genetske modifikacije u usevima. Za konvencionalne useve najviÅ”i dozvoljen nivo kontaminacije u praksi je 0,9%, Å”to je istovremeno i graniÄna vrednost za obeležavanje GM hrane i hrane za životinje u Evropskoj uniji. U Srbiji kritiÄna granica za semena iznosi 0,1%. U organskoj proizvodnji zakonska uredba ne dozvoljava upotrebu genetiÄkog inžinjeringa u sistemu proizvodnje semena
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