ISO-6322-1-1996.pdf
《ISO-6322-1-1996.pdf》由会员分享,可在线阅读,更多相关《ISO-6322-1-1996.pdf(24页珍藏版)》请在三一文库上搜索。
1、 W 4851903 Obb7453 546 W INTERNATIONAL STANDARD IS0 6322-1 Second edition 1996-1 1-01 Storage of cereals and pulses - Part I: General recommendations for the keeping of cereals Stockage des crales et des lgumineuses - Partie I: Recommandations gnrales pour la conserva tion des crales This material i
2、s reproduced from IS0 documents under International Organization for Standardization (ISO) Copyright License number IHSiICCI1996. Not for resale. No part of these IS0 documents may be reproduced in any form, electronic retrieval system or otherwise, except as allowed in the copyright law of the coun
3、try of use, or with the prior written consent of IS0 (Case postale 56, i211 Geneva 20, Switzerland, Fax +41 22 734 10 79), IHS or the IS0 Licensors members. Reference number IS0 6322-1 :I 996(E) Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=
4、NASA Technical Standards 1/9972545001 Not for Resale, 04/19/2007 00:58:25 MDTNo reproduction or networking permitted without license from IHS -,-,- m 485L903 0667454 482 m IS0 6322-1:1996(E) Foreword IS0 (the International Organization for Standardization) is a worldwide fed- eration of national sta
5、ndards bodies (IS0 member bodies). The work of preparing International Standards is normally carried out through IS0 technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International or
6、ganizations, governmental and non-governmental, in liaison with 60, also take part in the work. IS0 collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Draft International Standards adopted by the technical committees are
7、circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 YO of the member bodies casting a vote. International Standard IS0 6322-1 was prepared by Technical Committee iSO/lC 34, Agricultural food products, Subcommittee SC 4, Cereals and pu
8、lses. This second edition cancels and replaces the first edition (IS0 6322:1981), which has been technically revised. IS0 6322 consists of the following parts, under the general title Storage of cereals and pulses: - - Part 2: Essential requirements - Patt 1: General recommendations for the keeping
9、of cereals Patt 3: Control of attack by pests Annexes A and B of this part of IS0 6322 are for information only. O IS0 1996 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including phot
10、ocopying and microfilm, without permission in writing from the publisher. International Organization for Standardization Case Postale 56 CH-1 21 1 Genve 20 Switzerland Printed in Switzerland II Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=N
11、ASA Technical Standards 1/9972545001 Not for Resale, 04/19/2007 00:58:25 MDTNo reproduction or networking permitted without license from IHS -,-,- 4851903 Ob67455 319 IS0 IS0 6322-1:1996(E) Introduction The seasonal nature of cereal production, in conjunction with year-round consumer requirements, h
12、as always made it necessary to store grain for short or long periods. However, the caryopsis of cereals, like all plant life with a reduced metabolic rate, undergoes an unavoidable physiological development which can have beneficial effects (breaking of dormancy, improved baking quality, quality for
13、 making pasta, cooking quality), but which leads to ageing and, after a time, to changes which are detrimental and of a nature and intensity which are dependent upon the storage environment. When considered on a worldwide scale, these various changes result in very substantial qualitative and quanti
14、tative losses. Storage losses have been estimated as being an average of 5 % but sometimes as much as 30 %, especially in countries with climates favourable to the rapid development of agents of deterioration and where storage techniques are poorly developed, such as developing countries in the damp
15、 tropics. The principal causes of loss of quantity and quality are metabolic changes in the grain and the attacks of microorganisms (bacteria and moulds) and of vertebrate and invertebrate animals. The magnitude of these figures highlights the need for promoting throughout the world a rapid improvem
16、ent in techniques of conservation. . 111 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/19/2007 00:58:25 MDTNo reproduction or networking permitted without license from IHS -,-,- 48533
17、0667456 255 _ INTERNATIONAL STANDARD 0 IS0 Storage of cereals and pulses - Part I: General recommendations for the keeping of cereals 1 Scope This part of IS0 6322 gives general guidance related to the problems of keeping cereals. Other aspects of the storage of cereals and pulses are dealt with in
18、IS0 6322-2 and IS0 6322-3. 2 Normative reference The following standard contains provisions which, through reference in this text, constitute provisions of this part of IS0 6322. At the time of publication, the edition indicated was valid. All standards are subject to revision, and parties to agreem
19、ents based on this part of IS0 6322 are encouraged to investigate the possibility of applying the most recent edition of the standard indicated below. Members of IEC and IS0 maintain registers of currently valid International Standards. IS0 5527: 1995, Cereals - Vocabulary. 3 Definitions For the pur
20、poses of this part of IS0 6322, the definitions given in IS0 5527 and the following definition apply. 3.1 relative humidity: Ratio of the vapour pressure in a sample of moist air to the saturation vapour pressure with respect to water at the same temperature. 4 Aspects of the problems 4.1 Technical
21、factors The problem of keeping cereals arises at two different stages, as discussed in 4.1.1 and 4.1.2. 4.1.1 Immediately after harvesting, the cereals may sometimes remain moist for periods of time ranging from a few hours to several months. The product is particularly unstable and as a rule it is
22、at this stage that storage conditions are least favourable. It is frequently a question of storage on the farm or in small, not always adequately equipped, silos and storerooms, whilst awaiting the appropriate treatment. 4.1.2 Up to and including the international marketing stage, cereals are stored
23、 for anything from a few months to several years at or below a maximum moisture content, the level of which may be fixed in each country. Such 1 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resa
24、le, 04/19/2007 00:58:25 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 6322-1:1996(E) Q IS0 storage can be handled by very large bulk storage organizations with modern, well-equipped silos, or other types of bulk storage facility. The type of problem arising varies wit
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- ISO 6322 1996
链接地址:https://www.31doc.com/p-3780555.html