CHEMORECEPTION FOR CELLULOSE
CHEMORECEPTION FOR CELLULOSE
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DOI：
10.1093/chemse/16.6.691
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发表时间：
1991-12-01
期刊：
影响因子：
3.5
通讯作者：
RAMIREZ, I
中科院分区：
文献类型：
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作者：
RAMIREZ, I
大鼠被训练避免含有1%纯化纤维素的悬浮液，随后避免含有0.1%纤维素的悬浮液，但不避免含有玉米、小麦或大米淀粉的悬浮液。随后的实验检验了这种不寻常的化学接受形式的基础。粘度测量表明，纤维素和淀粉具有相似的粘度效应；在这些实验中使用的悬浮剂黄原胶掩盖了纤维素或淀粉在水中的大部分质地效应。因此，大鼠似乎不太可能通过纤维素的结构效应来感知纤维素。另一方面，那些被训练避免纤维素悬浮液的大鼠，也避免了经过过滤以去除纤维素颗粒的纤维素的水提取物。这一结果表明，水溶性杂质有助于纤维素的化学接受。这种水溶性杂质可以用水从纤维素上洗掉，但在洗涤后的纤维素干燥后又返回。很可能纤维素与大气发生反应，产生老鼠能感知的少量水溶性化合物。
Rats that had been trained to avoid a suspension containing 1% purified cellulose, subsequently avoided suspensions containing as little as 0.1% cellulose, but did not avoid suspensions containing corn, wheat or rice starch. Subsequent experiments examined the basis for this unusual form of chemoreception. Viscosity measurements indicated that cellulose and starch have similar effects of viscosity; the suspending agent used in these experiments, xanthan gum, masked much of the textural effects of cellulose or starch in water. Therefore, it does not seem likely that rats sense cellulose via its textural effects. On the other hand, rats that had been trained to avoid cellulose suspensions, also avoided aqueous extracts of cellulose that had been filtered to remove cellulose particles. This result suggests that a water-soluble impurity contributes to cellulose chemoreception. This water-soluble impurity could be washed off cellulose with water, but returned after the washed cellulose was dried. It is likely that cellulose reacts with the atmosphere to produce small amounts of water-soluble compounds that rats can sense.