Có 13+ tài liệu thuộc chủ đề "kỹ thuật thực phẩm"
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Đ tài: ề QUÁ TRÌNH VÀ THI T B TI T TRÙNG N Ế Ị Ệ ƯỚ C D A NĂNG SU T 1000 LÍT S M PH M/ H Ứ Ấ Ả Ẩ. Gi ng viên h ả ướ ng d n ẫ : T.S Tr n Th Thu H ng ầ ị ằ Nhóm th c hi n...
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Bảo quản khoai lang tươi. Khoai lang tươi là một trong những loại củ khó bảo quản vì khoai chứa lượng nước khá cao (80% trọng lượng). Có thể bảo quản khoai lang theo những cách sau đây:. Bảo quản trong hầm đào sâu dưới đất:. Bảo quản trong hầm bán lộ thiên: Hầm này cũng chọn chỗ. Bảo quản...
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Blackwell Verlag GmbH, Kurfürstendamm 57, 10707 Berlin, Germany The right of the Authors to be identified as the Authors of this Work has been asserted in accordance with the Copyright, Designs and Patents Act 1988.. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means, electronic, mechanical, photocopying,...
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Legislation, codes of practice and microbiological criteria. 2.1 UK legislation: the Food Safety Act 1990 2.2 European Community legislation 2.3 Hazard analysis. UK legislation: the Food Safety Act 1990. The Food Safety Act, the main provisions of which came into effect on 1 January 1991, provides the basic framework for all food legislation throughout the UK.. Its primary aim is...
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The recom- mended methods for performing the tests are described in Sections 4–9 of this manual and are cross-referenced in the right-hand column of the schedules.. The symbols that appear in the schedules indicate the status of the tests as follows:. Enterobacteriaceae — the sample fails if any arithmetic mean of the duplicate plates ex- ceeds colony forming units (cfu)/g...
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In the context of the code ‘exami- nation’ means microbiological examination by a food examiner (microbiolo- gist). A copy of this code should be available in every laboratory. The provisions of Part III, ‘Samples for Examination’, of the Code of Practice and the Guidance are summarized below.. This will depend on the pur- pose of the examination, for example whether...
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Purpose of the examination.. Apart from the obvious con- venience of using pre-poured plates, these surface methods have the advantages that they eliminate possible heat stress to the organisms from the molten agar, provide fully aerobic conditions of growth and facilitate identification of the organism types present.. Pour plate methods require the use of a clear growth medium to allow...
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If, however, only small numbers of that organism are anticipated, or if their presence is significant regardless of the number of cells (e.g. In addition the recovery of spoilage organisms may require adjustments to the isolation medium, such as an increase in the levels of salt or glucose, in order to mimic the nature of the spoiled commodity and thus...
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In addition, the regulations require the absence of pathogens in 25 mL of product but do not specify which organisms should be investigated. Check the temperature of the milk during the incubation period using the control container.. (b) After incubation mix the contents of the container thoroughly by inverting the container 25 times.. (c) Prepare serial decimal dilutions of the...
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8.1 Shell eggs 8.2 Bulk liquid egg. Shell eggs. Whenever possible an attempt should be made to quantify the numbers of organisms present.. Disposable gloves should be worn during the examination of shell eggs.. The source of the eggs (i.e. The type and size of the eggs (i.e. The name of the packer or producer.. Incubator set at 37 ±1°C...
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Council Directive 91/492/EEC [1] sets out the designation of production areas of bivalve molluscs based on levels of Escherichia coli or faecal coliforms/100 g of flesh and intravalvular liquid. In the UK testing for E. The microbiological criteria for the classification of shellfish harvesting areas are shown in Table 9.1.. In addition to the classification criteria, diarrhoetic shellfish poison (DSP)...
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Most of the media used in the tests detailed in this section can be obtained from commercial sources, usually in powder form, and require reconstituting and sterilizing before use. Some of the reagents prescribed in the tests may not be available commercially, and so methods for the preparation of these have been included in this section.. (a) Prepare a 10%...
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K THU T TH C PH M 2 Ỹ Ậ Ự Ẩ. 2.2.3 ng d ng Ứ ụ. Trong công nghi p hóa ch t và th c ph m, đa s các quá trình ch x y ra theo ệ ấ ự ẩ ố ỉ ả m t chi u h ộ ề ướ ng nh t đ nh...