Yellowing and brightness reversion of celluloses: CO or COOH, who is the culprit?
نویسندگان
چکیده
منابع مشابه
Early "profibrotic" or repair activity in the lung during cardiopulmonary bypass: who is the culprit?
I read with interest the work of Deheinzelin and colleagues (November 1997)1 documenting the upregulation of collagen mRNA expression early in cardiopulmonary bypass (CPB). This study is clearly original and addresses the question of how deleterious several medical procedures potentially can be al¬ though first designed to allow the correction of life-threatening conditions. This is a lesson in...
متن کاملThe Structure of Celluloses
X-ray and neutron fiber diffraction has been used to study cellulose as it is converted from its naturally occurring crystal phase, cellulose I, to an activated crystal phase, cellulose IIII, by ammonia treatment. The detailed crystal structures determined for cellulose Iβ, an intermediate ammonia-cellulose I complex, and cellulose IIII, reveal a structural transition pathway: hydrogen bonded s...
متن کاملit is not possible to understand developments of a country’s culture and civilization without knowing his believes and myths. whether it is north or south, east or west, planes or mountains, sahara or deserts, here in iran every corner includes valuable and precious treasures which are known all over the world, and cultural – historical objects which are found here adorn all well known museums of the globe. zagros mountains, lorestan province locating at the heart of that, are not only the same, but are more prominent than other iranian regions. you can not find someone who does not know what the lorestani bronzes are, and there is no museum that not be pride of having a piece of that. the said bronzes which are manufactured four millenniums b.c. are admired nearly by all those researchers because of their beauty, diversity and technique. lorestani artistic works including stone engraves, bronzes and clays, show an ideal and metaphysical world beside real world which explain mental system of human beings on that era against sensations and phenomena happening around them. men main mental occupation on that time was he unknown world which had surrounded them, and they used to use the religion to fight life’s natural factors, and art was a tool of religious and mythical painting which was far from reality and had entered into the abstract domain. as natural objects have become subjects of lorestani art, it cleanses them from any non – intrinsic limitations and external factors which surround them and darken their meanings, and just shows their main specifications. artist in the said civilization is not searching for realism. although these are few works showing the nature, but in effect there is no wish to imitate touchable factors of the nature, and artist has turned real phenomena to encoded signs as per his own mentality. this procedure is called stylization.
it is not possible to understand developments of a country’s culture and civilization without knowing his believes and myths. whether it is north or south, east or west, planes or mountains, sahara or deserts, here in iran every corner includes valuable and precious treasures which are known all over the world, and cultural – historical objects which are found here adorn all well known museums...
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از محوری ترین اثراتی که یک فیلم سینمایی ایجاد می کند دیالوگ هایی است که هنرپیش گان فیلم میگویند. به زعم یک فیلم ساز, یک شیوه متأثر نمودن مخاطب از اثر منظوره نیروی گفتارهای گوینده, مثل نیروی عاطفی, ترس آور, غم انگیز, هیجان انگیز و غیره, است. این مطالعه به بررسی این مسأله مبادرت کرده است که آیا نیروی فراگفتاری هنرپیش گان به مثابه ی اعمال گفتاری در پنج فیلم هالیوودی در نسخه های دوبله شده باز تولید...
15 صفحه اولMosquito repellent vaporizer poisoning--is the culprit transfluthrin or kerosene?
A 3-year-old boy presented with complaints of sudden onset vomiting and difficult breathing following accidental ingestion of a liquid mosquito repellent vaporizer (LMRV). He was alert, respiratory rate was 54/ min, and there were subcostal, intercostal retractions, nasal flaring, and fine crepitations over right lower chest. Arterial blood gas was normal on 6 L/min of inhaled oxygen. Chest rad...
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ژورنال
عنوان ژورنال: Cellulose
سال: 2019
ISSN: 0969-0239,1572-882X
DOI: 10.1007/s10570-018-2200-x