糯小麦粉添加比例对中国干白面条品质的影响

研究了糯小麦粉添加比例对中国干白面条(DWCN)品质的影响。糯小麦粉以0、10%、20%、30%、40%、50%、60%、70%、80%、90%和100%的比例添加到扬麦17号(1)粉中,并且以0、20%、40%、60%和80%的比例添加到扬麦158(1)、扬麦158(2)和扬麦17号(2)中。结果表明40%的糯小麦粉添加比例制成的DWCN具有最好的品质,其中添加40%糯小麦粉的扬麦158(1)混合粉制作的DWCN评分最高,而100%糯小麦粉则最差。DWCN的评分在很大程度上不受流变学性质如粉质仪和拉伸仪参数以及小麦粉组分、而更多的是受淀粉糊化性质的影响。DWCN质量可以通过增加峰值温度、或降低峰值黏度和回生值而加以改善。中等偏差流变学性质的100%糯小麦粉不适合于制作删,而以适当比例(40%)将糯小麦粉添加到非糯小麦粉中可能有助于改善DWCN品质。

小麦品系干白面条品质特性的遗传差异研究

对四川58份小麦品系的面条品质进行了系统测试和分析,旨在研究不同基因型与面条加工品质的关系,为优质面条小麦品种的选育提供理论依据。研究结果表明,多数品种(系)的面条品质特性在基因型间存在显著差异,其中面条咬劲、延伸性和最佳烹调时间具有很大的遗传选择潜力。面条的口感与咬劲、最佳烹调时间、吸水率、弹性和白度显著相关,r值分别为-0.480、0.735、-0.807、0.423和-0.312,用最佳烹调时间和吸水率可较好反映面条的口感。

Study on Food-making Quality of Strong-gluten Wheat Varieties from Lime Concretion Black Soil Area in the Huanghuai Wheat Region

In this study, 13 strong-gluten wheat varieties screened by the Key Project of Modern Agricultural Industry Technology System ＂Study on Industrial Technology for Strong-gluten Wheat from Lime Concretion Black Soil Area in the Huanghuai Wheat Region＂ were used as experimental materials to investigate their bread-making quality, noodle-making quality and other related characteristics. The results showed that more than half of the wheat varieties had better bread-making quality; the bread made from wheat with longer dough mixing time than 3.0 min had better texture, lighter color, and better taste. All these 13 strong-gluten wheat varieties showed good noodle-making quality in color, appearance, smoothness and taste; the differences between varieties were mainly found in palatability and viscoelasticity. Jimai 20, Xinong 979, Zhengmai 7698, Ji＇nan 17 and Zhengmai 9023 exhibited excellent bread-making quality; Zhengmai 366, Jimai 20 and Xinong 979 displayed excellent noodle-making quality. Fresh dough sheets made from Zhengmai 366, Jimai 20 and Xinong 979 exhibited slight color variation within 24 h and high peak starch paste viscosity; dry and cooked noodles made from Zhengmai 366, Jimai 20 and Xinong 979 had good quality.

数字化自调匀整系统的研究

自调匀整系统在纺织工业生产中,对提高纱条品质有着重要的作用。通过对机械式自调匀整的不足进行分析,提出和研究了数字化自调匀整系统的架构和关键技术,并对该系统的性能试验进行了分析。

Enhanced exergy cost optimization of operating conditions in FCCU main fractionator

Exergy indicates the maximal energy that can do work effectively. Different from optimization of product quality or calculation of generic energy conservation in most previous studies, the application of exergy analysis and exergy cost optimization in petrochemical industry is of great economic and environmental significance. Based on the main fractionator in Jiujiang Petrochemical Complex No. 2 FCCU, an enhanced exergy cost optimization under different operating conditions by adjusting set points of temperature and valves opening degree for flow control is studied in this paper in order to reduce exergy cost and improve the quality of energy. A steadystate optimization algorithm to enhance exergy availability and an objective function comprehensively considering exergy loss are proposed. On the basis of ensuring the quality of petroleum products, the economic benefits can be improved by optimizing the controllable variables due to the fact that exergy cost is decreased.

Laboratory Investigation of Disintegration Characteristics of Purple Mudstone under Different Hydrothermal Conditions

Disintegration of rock is one of the primary processes of soil formation and geomorphology and is affected considerably by water and heat.This study focused on the disintegration characteristics under laboratory conditions of typical purple mudstone from the Tuodian group of Jurassic red beds(J3t) in Tuodian Town,Shuangbai county,Yunnan Province of southern China.The fresh mudstone was subjected to alternating applications of water,heat and hydrothermal interaction during five treatments:wetting-drying(WD),saturation(ST),refrigeration-heating(RH),a combination of wetting-drying and refrigeration-heating(WDRH),and a combination of saturation and refrigeration-heating(STRH).Each treatment was run in twenty-four cycles.The results showed that there are three types of disintegration:collapsing disintegration,exfoliation disintegration and imperceptible disintegration.The cumulative disintegration rate(percentage of cumulative disintegrated mass to the initiative sample mass passed through a 2 mm sieve) produced a 'S'-shape function when related to treatment cycle time and closely fit a logistic model(R2 > 0.99).The rank order of the cumulative disintegration rate resulting from the five treatments was as the following:WDRH > STRH > ST > WD > RH.Because of alternating periods of moisture and dryness,WD caused the most disintegration,while RH alone resulted in imperceptible disintegration.Additionally,there was a negative correlation between the disintegration rate of each treatment cycle(percentage of disintegrated mass to the treated sample mass) and treatment cycle number.There was a positive correlation between this rate and temperature change under moist conditions,indicating that a change in temperature greatly accelerates the disintegration of parent rock when water was supplied.

Effect of rearing conditions on carcass and pork quality attributes of finishing pigs

The effects of sex, housing temperature, feed ingredients and slaughter weight on carcass and meat quality were investigated. A total of three-way crossbred （LWD） 100 pigs were used in a completely randomized design to study the influence of rearing condition, in the growing finishing period, the initial weight, finial weight, live weight, total feeding days, daily weight gain and total feed consumptions affected carcass traits and meat qualities. In conclusion, the rearing condition will give a significant effect on pork and carcass quality so that they can be controlled by changing the raising situation.

Product Defect Management of Children's Toys Made in China——A renection on the two-year implementation of Children's toys recall system

The Management Regulations on Recallof Children's Toys is a recall system based onthe Management Regulations on Recall of MotorVehicles in China.During its two years,the children'stoy recall management system has helped toprevent and eliminate damage caused by defectivechildren's toys.It has also helped to protect children'shealth and safety,safeguard public safetyand interest,and improve toy manufacturers' productquality and safety awareness.However,due tothe small scale of most Chinese toy manufacturers,and the low standard of management,more effort isneeded from government departments and thecommunity to improve the recall system.