筛板

The new sieve tray tower of carrier gas evaporation can be installed with multiplayer sieve trays, and has double concentration ratio as compared with that of general sieve tray towers, and can be operated under vacuum conditions, which can avoid the leakage of acrylamide.

依据新方法开发的新型载气蒸发筛板塔可采用多层塔板操作，该塔与未设置加热管且塔板较少的情况相比，浓缩比可以提高1倍；采用负压操作，可以避免丙烯酰胺泄漏。

In the organic glass tower of 600mm in diameter, the pressure drop, leakage and mist carrying of the high efficient flow-guided sieve tray were measured in the experiment and we found that there was no flooding phenomenon when the resident time of liquid in the downcomer was less to 2. 5 second. It shows that the structure of the tray is reasonable and it can increase the column capacity greatly.

在自建的φ600mm有机玻璃塔内对高效导向筛板的各项流体力学性能进行有关实验研究，其中发现在高气速下当液体在降液管中的停留时间低至2.5秒时，仍没有观察到液泛现象，说明高效导向筛板可在不改动降液管的情况下大规模地提高塔设备的液相通量和生产能力。

These data on ethmoid roof and cribrum should benefit the endoscopic sinus surgery and transnasal ethmoidectomy.

了解筛顶板及筛板的影像解剖对进行鼻内筛窦手术重要指导作用。

The cortical cells had thin walls and mitochondrium, and nucleus wassurrounded by chloroplasts, and vesicles were next to cell plasmalemma. However, cellwalls of velamen, cortex and exodermis in the mycorrhiza of D. nobile had ring orpapillary thickenings in many cases. The hyphae were surrounded by moremitochondria and vesicles of plant, and the hyphae were digested and their structure waschanged at last. The cell wall of endodermis also had typical ring thickenings, and manysieve orifices in sieve tube elements of phloem were covered by callose, while therewere liaison cords in a few sieve orifices.

金钗石斛菌根的根被细胞的细胞壁多处出现环形圈，外皮层细胞壁加厚，木质化，也有环形圈存在，皮层细胞细胞壁多角形明显，加厚，皮层细胞中存在被消化、失去结构的真菌菌丝，在菌丝周围有较多的线粒体、小泡，内皮层细胞的细胞壁呈现的典型的加厚及木质化环形圈，韧皮部筛管的筛板结构，绝大多数筛孔已为胼胝质所覆盖，仅个别筛孔中还存在连络索。

The casting and moulding process for forming the polyurethane sieve plate s is introduced briefly.

简要介绍了聚氨酯筛板浇注成型工艺过程，重点叙述了聚氨酯筛板浇注成型模具及浇注平台的结构与设计要点。

The good characteristic of polyurethane material makes the polyurethane sieve plate evidently exceed the rubber sieve plate in the application and processing.

由于聚氨酯材料优良的特性使得聚氨酯筛板在应用与加工方面明显优于橡胶筛板。

Recording electrode was placed on the scalp near the olfactory bulb. Results Electrically evoked olfactory potentials composed of triphasic negative-positive-negative peaks, named N1, P1, N2 respectively, were detected on the olfactory region. The latencies of N1, P1, N2 were 16.27ms, 25.36ms, 49.75ms respectively in cribriform plate.

结果 电极置于筛板和鼻甲嗅区粘膜可记录到一组&负-正-负&三相的诱发电位波，依次命名为N1、P1、N2，当刺激强度为2.0 mA时，筛板粘膜诱发电位的潜伏期分别为16.27、 25.36、 49.75 ms；鼻甲嗅区粘膜诱发电位的潜伏期为20.29、31.31、 46.83 ms。

The difference of blood capillary caliber in nipple prompts ischemic lesions occur easily in sieve plate prezone and sieve plate district.

视乳头各层毛细血管口径不同，提示筛板前区及筛板区容易发生缺血性病变。

Structured packing which has wire mesh packing, sheet packing nets, rolling-hole packing, corrugated plate packing, etc.; bulk packing are: Powell ring, ladder ring, Intalox ring, flat ring, conjugate ring, the British park , double convex ring, ring ohm, V-ring, ring 84 inside the arc and so on; experimental filler: Q net ring packing, rolling-hole ring packing, Seater, Central and so on, column has: Tortoise net, float valve, connectors , Nagarze, blister, plate, tray, distribution devices, such as demister.; Products sold throughout the country, exported to Southeast Asia.

其中规整填料有丝网波纹填料、板网波纹填料、压延孔波纹填料、孔板波纹填料等；散装填料有：鲍尔环、阶梯环、矩鞍环、扁环、共轭环、英特帕克、双凸环、欧姆环、V型环、八四内弧环等；实验填料：Q网环填料、压延孔环填料、西特环等，塔内件有：龟甲网、浮阀、连接件、卡子、泡罩、筛板、塔板、分布器、除沫器等。；产品畅销全国，远销东南亚地区。

The products of company mainly include Bubble-Cap Tray, Vertical Shifter Pagoda Plate Tray, High-effect HLMV Float Valve Tray, Firm-Float Valve Tray, F1 Float Valve Tray, Guiding sieve Plate Plate Tower Tray and various types of gauge tower internals products such as neat packing, random packing.

公司主要产品有泡罩塔、垂直筛板塔、高效HLMV浮阀塔盘、固阀塔盘、F1浮阀塔盘，导向浮阀塔盘、导向筛板塔盘等。各种规整、散堆填料和各种类型的液体分布器等塔内件产品。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。