光纤温度传感器在微波场测温中的应用

处于强电磁场的环境下，在微波场中温度的测量依然是一个技术难题。介绍了适用于微波场测温的各类光纤温度传感器，阐述了光纤光栅用于温度传感的原理及在微波场中测温的前景与应用。对微波场中测温技术的进一步发展具有一定的参考价值。     

GFH系列光纤阀位回讯器的工作原理与特点

介绍了运用光纤传感技术研制的光纤阀位回讯器的工作原理、特点及技术性能。由武汉工业大学光纤传感科技股份有限公司研制生产的GFH系列光纤阀位回讯器 ,于 1999年通过中国石化总公司成果鉴定。目前已广泛应用于钢铁、石化等行业 ,使用期最长的已达 5年之久 ,不失为一种性能价格比较高的、有前途的新型阀位回讯装置     

果聚糖的系统中文命名的探讨

果聚糖的应用领域不断扩大,针对果聚糖组分的研究也越来越深入。不断发现不同结构的组分,但缺乏标准化的系统命名方法,不利于果聚糖产品有效成分的分析、推广及应用。本文重点探讨果聚糖的系统命名和中译名的方法。回顾Waterhouse和Lewis命名体系,分析现有命名体系存在的问题,综合Waterhouse和Lewis命名体系各自的优点并融入中文翻译和系统命名的习惯,提出在以蔗果三糖的三种不同连接方式形成的三种异构体的基础上研究得出中文译名的方法。这套命名体系能够准确并明确地指代果聚糖的功能组分,规范和统一结构式和中文译名,避免混淆和误导的出现,对文献的编辑和检索带来准确和效率。贯彻果聚糖的系统中文命名法对于与同行业交流和在向国际市场推广中国的产品乃至与国际研究技术同步的进程中具有重要的意义。      

热处理对功能性低聚糖稳定性的影响

为了测定功能性低聚糖的稳定性,建立了应用高效液相色谱法快速测定功能性低聚糖的方法,测定了水苏糖、低聚异麦芽糖、低聚果糖在酸性、中性、碱性环境中加热不同时间的稳定性。结果表明,水苏糖在中性和碱性环境下均非常稳定,酸性环境下,121℃,25min后水苏糖保留率为74%;低聚异麦芽糖在中性和酸性环境下非常稳定,碱性条件下总功能性低聚糖保留率为89%;低聚果糖在中性条件下121℃,25nin后总功能性糖保留率降至74%,酸性环境下,保留率为31%,碱性稳定。     

固定化黑曲霉增殖细胞生产低聚果糖的研究

黑曲霉孢子经海藻酸钙包埋３３ｈ后得到的固定化增殖细胞其酶活性达到最高，机械强度仍保持较高水平（为起始时８０％），最适ｐＨ为５．０，与游离酶相同，最适温度为５５℃，比游离酶高５℃；有害离子对其影响较小，其Ｋｍ（以蔗糖为底物）为８２ｍｍｏｌ．将固定化增殖细胞装入填充式反应柱，产品中低聚果糖含量在５０％～５５％，操作一个月活性保持不变。     

共固定化生产高含量低聚果糖的研究

生产低聚果糖过程中，副产物葡萄糖抑制酶反应，降低了产物中低聚果糖的含量。本文采用两种固定化方法，通过去除或转化葡萄糖，从而制备出高含量的低聚果糖。首先以２％戊二醛和０．１％丹宁于２０℃时处理固定化黑曲霉菌体与葡萄糖氧化酶，将菌体与酶共包埋得到固定化颗粒，所得到的共包埋产物于５０℃ｐＨ５．０条件下与５０％蔗糖溶液摇瓶反应２４ｈ，得到７１％的低聚果糖；又采用固定化黑曲霉增殖细胞与固定化葡萄糖异构酶协同作用方法，将５０％蔗糖溶液通入柱式反应器，连续生产得到高含量低聚果糖，产物中低聚果糖和果糖含量分别为６３％和１６％。     

新型光纤高温计的研究

介绍了新型光纤高温计的工作原理及特点,并对其在生产实际中的使用情况进行了经济效益比较分析。     

Iron bioavailability from ferric pyrophosphate in rats fed with fructan-containing yacon (Smallanthus sonchifolius) flour

The effects of inulin-type fructans (ITF)-containing yacon flour (YF) on Fe bioavailability from ferric pyrophosphate (FP) were evaluated in Fe-deficient rats using the Hb repletion efficiency (HRE) assay. Weanling male Wistar rats were fed a low-Fe diet (12 mg/kg) for 15 days followed by 2 weeks of Fe repletion with diets providing 35 mg Fe/kg as either ferrous sulphate (FS) or FP, supplemented with 7.5% ITF as either YF or Raftilose (RAF), a purified ITF. ITF increased caecal fermentation, whereas YF was more butyrogenic than RAF. ITF improved HRE in FP-fed rats, and those fed YF had a higher relative biological value compared with those fed FP and RAF. Liver Fe was increased by ITF, but only YF led to values similar to those in the FS group. It is observed that ITF increased caecal fermentation and Fe bioavailability. These effects were more pronounced when YF was the ITF source.     

The effect of inulin and fructo-oligosaccharide supplementation on the textural,rheological and sensory properties of bread and their role in weight management: A review

There is evidence that fructo-oligosaccharides (FOS) and inulin can impart a range of health benefits if consumed on a regular basis. The health benefits include increased mineral absorption and improved immune response and while there is mounting evidence that prebiotics play a role in colorectal cancer prevention, their role of satiety and weight management is still being investigated.     

Amount of characteristic compounds in 15 cultivars of onion (Allium cepa L.) in controlled field trials

BACKGROUND: In order to develop the production of sweet onions (Allium cepa L.) and onions with a high content of flavonols and fibre in Norway, it was necessary to evaluate available cultivars with respect to their content of selected chemical compounds. A field trial with 15 different cultivars was conducted at Landvik in southern Norway. Compounds that reflect onion pungency and sweetness (pyruvate, sugars) and parameters known to have a beneficial impact on health (fructo‐oligosaccharides (FOS), flavonols, antioxidant capacity) were analysed. RESULTS: The sweetest onions with respect to low content of pyruvate and high amount of fructose and glucose ranged in pyruvate content from 2.7 to 3.6 µmol mL^?1. These cultivars were juicy and contained low amounts of FOS and total flavonols. The most pungent onions contained the highest amounts of FOS among the cultivars: 4.53, 3.80 and 5.81 g per 100 g fresh weight (FW) respectively. They also had a high content of flavonols (86.6, 159.2 and 97.6 mg per 100 g FW) and high dry weight content (14.6, 13.5 and 15.6 g per 100 g). CONCLUSION: The sweetest onion cultivars were found to be ‘NUN 9746’, ‘Musica’, ‘Domenica Supersweet’, ‘Colossus’ and ‘Cronus’. The most pungent cultivars were ‘Powell Brown’ and ‘Tilbury’, which also contained the highest amounts of flavonols and gave the highest Trolox equivalent antioxidant capacity (TEAC) values among the 15 cultivars. Copyright © 2007 Society of Chemical Industry