疏松的

PVA-2080 is one of the important dispersing agents to produce loose polyvinyl chlorid. At present KH-20 is mainly imported from Japan to take the place of the traditional gelatin to produce high quality PVC in our country. In order to solve this problem, we exploit PVA-2080 to replace the foreign products. The experiment includes two steps of polymerization and a process of partial alcohlysis. After a number of trials, we get a product of white particles.Its average degree of alcoholysis is 80.77% and t...

聚乙烯醇- 2 0 80 (PVA - 2 0 80 )是生产疏松型聚氯乙烯的重要分散剂之一目前，国内主要依靠进口日本的KH - 2 0以代替传统的明胶来生产高质量的PVC产品为了解决这一问题，作者开发了PVA - 2 0 80 ，以代替国外进口本试验经过两步聚合和部分醇解等过程，通过正交试验优化试验条件，得到了外观为白色粉末状颗粒、平均聚合度为 2 0 4 2、醇解度为 80 。77%的产品经小釜应用试验，效果比较理想

In the catalyst after leaching, other than nanoscaled Ni crystallites, boundary area is observed from HREM. These areas are low contrast and high brightness. The atomic density of these areas should be low, therefore, it is suggested that they are rich in voids and phosphorus atoms.

高分辨电子显微观察显示，合金脱铝形成镍纳米晶的同时，还形成了纳米尺寸的低密度、高亮度的界面区域，该区域与其它文献中提到的孔洞尺寸相当，但认为它应该是富含铝及大量缺陷的结构疏松区。

Assessment of calcaneum bone quality and quantity using quantitative ultrasound can be an effective method in screening and preventing of osteoporosis in aged cohort.

近年来发展起来的定量超声法(Quantitative ultrasound，QUS)利用超声对物质密度、结构及材料的特征表现来评价骨的质量，已被证实与双能X线骨密度测定(Dual一cnergy X一ray absorptiometry，DXA)具有良好的相关性，因而成为一种适宜于在大规模人群中筛选骨质疏松高危患者的经济、方便的检测方式l，幻。

Feb. 28, 2005 — All patients with osteoporosis should be screened for celiac disease, according to the results of a single-institution study published in the Feb. 28 issue of the Archives of Internal Medicine . However, the editorialist suggests that more study is needed before generalizing, especially because a number of the cases should have been diagnosed independently from symptoms.

Feb。 28， 2005 -一项刊载於2月28日内科学志，由单一研究机构所进行的研究结果显示，所有骨质疏松症的患者皆应该接受腹腔疾病的筛选；但是，该期刊编辑人员建议，在将该研究结果一般化之前，应该进行更多的研究，特别是，有一些案例应该接受非症状性的诊断。

Art of figuration of the protruding after classics skin centrum (Percutaneous Kyphoplas-ty, PKP) is to be in art of figuration of classics skin centrum (Percutaneous Ver-tebroplasty, the technology of small innovation of surgery of a rachis that the development on the foundation of PVP) rises, its fundamental is the buy inside preexistence centrum enters but expansile ball bursa , the dilate that carries ball bag forms a cavity inside centrum, again infuse stuff stuff, correct deformation thereby, achieve constrictive to a few osteoporosis or tumour centrum that bring about fracture (Vertebral Compressionfractures, the remedial purpose of VCFs).

梗概： 经皮椎体后凸成形术(percutaneous kyphoplas-ty，PKP)是在经皮椎体成形术(percutaneous ver-tebroplasty，PVP)的基础上发展起来的一项脊柱外科微创新技术，其基本原理是先在椎体内置入一个可膨胀性球囊(inflatable bone tamp，IBT)，通过球囊的扩张在椎体内形成一个空腔，再注入填充材料，从而纠正畸形，达到对一些骨质疏松或肿瘤等导致的椎体压缩性骨折(vertebral compressionfractures，VCFs)的治疗目的。

The ground of prepares ground of 1.1 cuttage nursery choice cuttage nursery before 1 cuttage should choose earthy and relief evenness, loose, source of water enough, illumination the loam of good, small acidity sandiness that does not have damage caused by a windstorm and freeze injury, control of height above sea level is under 700m, traffic compares convenient place. Cent of bedding of soil preparation of bedding of 1.2 soil preparation undertakes 2 times, first time is comprehensive soil preparation, soil preparation deepness amounts to 30cm above, combine bedding the 2nd times, 15cm of soil preparation deepness, etc of cleared block, fireweed is sundry, make land as far as possible fine.

其主要的技术要点如下。1扦插前的预备1.1扦插苗圃地的选择扦插苗圃地要选择地势平坦、土质疏松、水源充足、光照良好、没有风害和冻害的微酸性沙质壤土，海拔高度控制在700m以下，交通比较方便的地方。1.2整地作畦整地作畦分2次进行，第一次全面整地，整地深度达30cm以上，第二次结合作畦，整地深度15cm，并清除石块、杂草及其他杂物，尽量将土整细。

The thermal kinetics characteristics indicate the nature of the distillations approaches that of the diesel oil and the distillations can be used as the substitutes for petroleum.

由于其具有密度小和疏松多孔的特点，加工后还可成为很好的吸附材料。为了简化操作过程，蒸馏的温度范围可以设为150℃以下和150℃～210℃，可以得到150℃以下馏分的上下层、150℃～210℃馏分和生物质炭四种产品。

These risk factors include degree of preoperative serum calcium elevation (levels greater than 12, 13, or 14 mg/dL) in patients with adenomas, severe osteoporosis (bone density T-score less than ?3), morbid obesity (body mass index greater than or equal to 40 kg/m2), the removal of more than 1 parathyroid gland, and the manipulation or biopsy of the remaining glands.

Vasher医师解释，这些危险因子包括罹患腺瘤患者术前血清钙的上升的幅度（超过12、13甚至14 mg/dl的浓度）、严重骨质疏松症（T指数低於-3）、病态性肥胖（身体质量指数大於等於40 kg/m2）、切除超过一个以上副甲状腺、以及对於使用剩下的腺体或进行切片。

They can be widely used in the following industries:aviation. Aerospace, soldierwork, railroad, metallurgy, the automobile manu_facturing,I.C. engine,shipbuilding ect,especially used for theaccessory made of the magnetic material, such as axletree, shafts of different sizes,pole,crank, impeller,lamina,anchor man chain gear,standard pieces and valve ect,Asto the crack,pucker,loosing such surtace defects caused by the reason of raw materials or heat treatment ,sealing,founding,forging and pressing, tiredness, quenching, milling and paring, our products can detect them without any loss.

产品广泛应用于航空、航天、军工、铁路、冶金、汽车制造、内燃机、造船业、弹簧、压力容器、石化、桥梁、油田、机械制造等行业，如锻压件、轴承、大小轴类、连杆、曲轴，叶轮，叶片，锚链、齿轮、标准件、阀门等铁磁性材料制成的零件，因原材料的原因或者热处理、焊接、铸造、锻压、疲劳、淬火、磨削而引起的裂纹、夹渣、折叠、疏松等表面缺陷的无损检测。

Dr. Umberto Maggiore, explained that people on a low-calcium diet excrete less calcium in their urine but more of the other substance that combines with calcium to form most kidney stones.

许多医生曾告诉这些患者减少钙的摄入，因为大多数肾结石的成份是钙。但是最近的研究已表明，低钙饮食不仅不能预防肾结石，甚至会促使它的生成，还伴有骨质疏松。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。