液氮

The design project of refrigerating and vacuum system of the test-bed for heat tube in artificial satellite was introduced.

介绍了能满足卫星环境要求的热管传热试验台的制冷与真空系统的设计方案，提出了一种采用液氮制冷和分子泵抽真空系统的方案。

The alternative is to liquefy the hydrogen at great expense and transport it in road tankers refrigerated with liquid nitrogen.

一个替代的办法是以巨大的代价把氢气液化，并用带液氮冷却的罐车运输。

Results showed a high-purity and a good-integrity DNA can be obtained from the preserved fresh leaves of Camellia azalea, using the methods of modified CTAB and SDS subarea. The DNA extracting quality from the leaves preserved with silica gel by the methods of modified CTAB and SDS subarea is high, which is the same as from the leaves preserved at the -200C and liquid nitrogen, So these preserving methods are suitable for the fresh leaves of Camellia azalea, including for it from distant place.

结果表明，改进的CTAB和SDS区室法都适合杜鹃红山茶基因组DNA的提取，都能提取到完整性较好、纯度较高的基因组DNA，且在采用的-200C、液氮、硅胶脱水干燥3种方法保存样品中，硅胶脱水干燥法保存的样品与其它几种方法保存的样品一样，提取获得了高质量DNA，为远距离采样提取杜鹃红山茶DNA提供了一种较好的鲜叶保存方法。

The Boletus aereus freezing pattern was studied through analyzing the freezing curve at different temperature, freezing speed and juice leakage by liquid nitrogen flash freezer .

采用液氮速冻，研究在不同的冻结温度下黑牛肝菌的冻结温度曲线及其冻结速度和汁液流失率之间的关系等。

Methods the caput femoris necrosis models were established in 23 rabbits with bilateral caput femoris necrosis, and 45 necrotic caput femoris were randomly divided into 3 groups with 15 necrotic caput femoris in each group.

23 只新西兰白兔，用液氮冷冻的方法，建立双侧股骨头坏死模型，取其中45 个坏死股骨头，随机分组，分别为对照组，实验1 组，实验2 组。

This paper introduces a Large scale Cold-roll deep cooling reinforce equipment which is the equipment can ultralow temperature reinforce for high alloy steel,high-speed steel roller. It use the advanced technology by liquidnitrogen-boilaway,through the patented design of case cover structure ,locking equipment and sealability(had registered two utility model patent)which is assured the technical target like temperature uniformity and etc.

本文介绍了一种大型超低温强化处理装置，它是高合金钢、高速钢轧辊进行超低温强化处理的工艺装备，它采用先进的液氮气化制冷技术，通过箱盖结构和锁紧装置及密封性能方面的专利设计（注册了两项实用新型专利）保证了该装置在温度均匀性等方面的技术指标，可以及时、有效地对冷轧辊进行超低温强化处理。

The result show in transplanted vessel EF-1 and PCNA are mainly expressed in smooth muscle cells and Clemons rate proliferation of SMC is the core of endothelium proliferation.In the third part of our experiment we use fluid nitrogen to fire transplanted rein, crofter tissue homogeneous to test the expression of CE and EF-1 gene we use RT-Craned immunohistologiccal method to test mKNA and protein level respectively and analyze the expression of these tm genes in transplanted vein.

本实验的第二部分，我们将术后大鼠分为10组，每组8只，分别于术后6hours、24hours、72hours、1W、10days、2W、3W、4W、6W、8W切取移植静脉，将切取的不同时期的移植静脉分别置于10％中性福尔马林溶液中固定和液氮冷冻固定，将福尔马林溶液固定的标本制成4μm厚石腊切片，，常规进行病理观察大体改变，静脉标本HE染色后于光镜下观内膜增殖情况，并应用PCNA单克隆抗体，观察SMC增殖情况。

As a kind of excellent cryogen,liquid nitrogen has been widely used in many fields,such as the aerospace,electronic engineering,cooling of superconducting magnet and superconducting power cable,cryo-medicine,etc.

作为一种优良的低温冷却剂，液氮在航天、电子工业、超导磁体和超导电缆冷却及低温生物医疗等领域应用广泛。

The system was reassembled using a new 4K GM cryocooler with larger cooling capacities both at the first stage and the second stage. The magnet reached a field of 5. 1T central field. This reassembled system was a cryogen free superconducting magnet system.

用一级和二级制冷量都较大的GM制冷机组成了第二套磁体系统，磁体中心场到了5T，既没有使用液氦，也没有使用液氮，这一套系统是最新式的无液体制冷剂的超导磁体系统。

The two most widely used systems are Cryotech (CandelaLaser Corp., Wayland, Mass) which uses liquid nitrogen as cryogen, and Cryocare (EndoCare.Inc., Irvine, Calif.) which uses argon gas as a cryogen.

两个最广泛应用的系统是应用液氮作为冷冻剂的Cryotech（Candela激光公司， Wayland， Mass），和应用氩气作为冷冻剂的Cryocare（EndoCare有限公司，Irvine， Calif。）。

For a big chunk of credit-card losses; the number of filings (and thus charge-off rates) would be rising again, whether

年美国个人破产法的一个改动使得破产登记急速下降，而后引起了信用卡大规模的亏损。

Eph. 4:23 And that you be renewed in the spirit of your mind

弗四23 而在你们心思的灵里得以更新