高收缩水溶维纶纱在纺织品生产中的应用

介绍了用高收缩水溶维纶纱生产起绉、起绒、镂空等高档织物的工艺和技术关键 。

内镜下乳头球囊扩张术对胆囊收缩功能的长期影响

We prospectively studied long- term (5 years) effects of endoscopic papillar y balloon dilation (EPBD) on gallbladder motility. Thirteen patients with intact gallbladders (six with and seven without gallbladder stones) who had undergone EPBD for choledocholithiasis were enrolled in this study. Gallbladder volumes, w hile fasting and after dried egg yolk ingestion, were determined by ultrasonogra phy, before and at 7 days, 1 month, and 1, 2, and 5 years after EPBD. Before EPB D, the gallbladder had a larger fasting volume and lower yolk- stimulated maxim um contraction than in normal controls. Seven days after EPBD, fasting volume wa s decreased and maximum contraction was increased, regardless of whether the pat ient had gallbladder stones, showing significant differences from the pre- EPBD values. At 1 month to 5 years after EPBD, these changes were far less evident a nd gallbladder function did not differ significantly from baseline. EPBD does no t adversely affect gallbladder motility in the long- term (5 years).

Experimental study on shrinkage and rehydration of seed during drying process

Biomaterial will shrink during the drying process. The characteristics of shrinkage and rehydration of fresh peas were studied. Drying curves, shrinkage and rehydration curves of peas without seed coats and whole peas were compared. In addition, different volumetric shrinkage coefficients were obtained and discussed. The results show that seed coats resist moisture movement not only from inside to outside but also from outside to inside during different drying conditions. During a seed’s drying process, the drying curve is similar to the shrinkage curve. The higher the heat flux is, the less drying time is needed, and in the meantime, volume would shrink more and more intensively. Dried media will break easily at high heat flux. When we create a drying regime, both drying speed and the quality of dried media should be considered.

学会生活

学会生活夏季如何护扶不少人有一种误解，认为炎热的夏天与各类护肤品无缘。其实，夏季的护肤更为重要。这是因为夏季皮肤上的汗腺、皮脂腺分泌明显增加，于是，直接暴露于空气的皮肤更容易受到灰尘与细菌的污染，这时，如果不注意护肤，到了秋风送凉之时，你对镜而照会蓦...

2017年山东省重点产业技术改造投资指南(摘录)

八、建材行业（一）水泥1.鼓励采用的技术工艺和装备：高能效低氮预热预分解及烧成技术,高效节能料床粉磨技术,原料、燃料均化配置技术,数字化智能型控制技术,废弃物安全无害化处置和资源化利用技术,新型低碳高标号水泥熟料生产技术,专用水泥制备成套技术与装备。

虽All in VR,但营收难“止跌”

从手机市场的巨头,到All in VR,HTC的决策看似“超前”,实际上却谈不上什么成功。“跌跌不休”的营收2020年1月6日HTC发布了2019年财报,财报显示2019年12月HTC合并营收仅为1.38亿元人民币,全年收入为23.1亿元人民币,同比下滑了57.82%,比2017年的总收入下降87%。要知道,早在2001年HTC的营收就已超过35.9亿元人民币,2019年不仅是19年来营收最差的一年,相比巅峰期,营收缩水更是超过40倍。

优化Office Lady生活

工作时的压力和情绪影响着生活质量,你的喜怒哀乐,也可能涉及到其他的家庭成员,那么你就可以尝试一下下面的方法,让你回到家中以后,能尽快地进入"角色"……上班前10分钟OL靓妆时间是个聒噪的闹钟,不停地在催促你快点、快点、再快点,这点难题怎么能难倒擅于精打细算的你,Let’s go! 1.从雪柜取出预先冷冻的毛巾,然后闭起双眼,将毛巾放于双眼处一分钟。

泰国药皂的“锦丽”传奇

一块小小的香皂就能替代洗面奶、面膜、收缩水?而且还能治疗青春痘、黑斑、狐臭、脚气、调整血液循环……太神奇了吧?从泰国远道而来的"锦丽"草本精华皂就书写了一个美好、跌宕的传奇。

彻底击退“黑头”问题

"黑头"是硬化油脂阻塞物,通常出现在脸的额头和鼻子部位。当油脂腺受到过分刺激,毛孔充满多余的油脂而造成阻塞时,在鼻子部位,通常会有油腻的感觉,而这些油脂最终会硬化,经氧化后成为黑色的小点,这些小点也就是人们称作"黑头"的油脂阻塞物。黑头产生的主要原因是皮脂腺分泌过度。这种分泌过度会导致皮肤毛孔变粗。毛孔中的油脂聚集并硬化成为楔状,毛孔就被硬化的油脂堵塞。因为毛孔是开放的,硬化的油脂接触到空气被氧化而变黑,这样,就形成了我们经常见到的黑头了。

粘土砖质量缺陷及其克服——第八讲 粘土砖掉小头的原因及克服方法

粘土砖“掉小头”多是成批出现,红砖、青砖都存在这一质量问题。掉小头主要是在干燥、烧制过程中形成的。制砖粘土从塑性指数分类有粘土(】17)、亚粘土(【10)、轻亚粘土(【7)和亚砂土(【3);从颗粒级配划分有粘土(【0.005毫米)、尘土(0.05～0.005毫米)、砂土(】0.05毫米)之分。由于粘土的成因不同。

44.01%,近半浙股对新冠免疫

从浙江上市公司半年报的营收数字里可以看出,疫情冲击下,只有部分行业表现突出,比如机械设备、医药生物、化工等,它们被“黑天鹅”翅膀扇动的风吹得很高,逆势而上,实现了雾霾变晴天;而一些如影视传媒、家用电器、餐饮、纺织服装等行业,营收缩水严重。

Performance analysis of ammonia-water absorption/compression combined refrigeration cycle

In view of different compressor adding ways in the ammonia-water absorption/compression combined refrigeration AWA /CCR cycle combining the Schulz state equation of the ammonia-water solution the theoretical analysis and calculations on two combination ways by adding the compressor in the high-pressure area and in the low-pressure area are conducted respectively.The effects of several factors including the evaporation temperature Te heat-source temperature Th as well as the cooling water temperature Tw on the equivalent heat consumption in compression qCW heat consumption in absorption qG and the system coefficient of performance COP are analyzed under the two combination configurations.The results show that the effect of the equivalent heat consumption in compression on the COP is less than that of the heat consumption in absorption.Besides the compressor set in the high-pressure area uses more energy than that in the low-pressure area. Moreover the compressor in the low-pressure area is superior to that in the high-pressure area with respect to the COP. Under the given intermediate pressure there is an optimum heat-source temperature corresponding to the maximum COP of the AWA/CCR cycle.

Role of nitric oxide in the impairment of circular muscle contractility of distended, uninflamed mid-colon in TNBS-induced acute distal colitis in rats

AIM： To evaluate the role of nitric oxide （NO） in the motor disorders of the dilated uninflamed mid-colon （DUMC） from trinitrobenzene sulfonic acid （TNBS）-induced acute distal colitis in rats. METHODS： Colitis was induced in male Sprague-Dawley rats by a single intracolonic administration of TNBS. Control rats received an enema of 0.9% saline. The rats were killed 48 h after TNBS or saline administration. Macroscopic and histologic lesions of the colon were evaluated. Myeloperoxidase （MPO） and nitric oxide synthase （NOS） activity were measured on the colonic tissue. In TNBS rats, we evaluated spontaneous and evoked contractile activity in circular muscle strips derived from DUMC in comparison to the same colonic segment of control rats, both in the presence and in the absence of a non-selective NOS isoforms inhibitor N-nitro-L- arginine （L-NNA）. Pharmacological characterization of electric field stimulation （EFS）-evoked contractile responses was also performed. RESULTS： In TNBS rats, the distal colon showed severe histological lesions and a high MPO activity, while the DUMC exhibited normal histology and MPO activity. Constitutive NOS activity was similar in TNBS and control rats, whereas inducible NOS activity was significantly increased only in the injured distal colon of TNBS rats. Isometrically recorded mechanical activity of circular muscle strips from DUMC of TNBS rats showed a marked reduction of the force and frequency of spontaneous contractions compared to controls, as well as of the contractile responses to a contracting stimulus. In the presence of L-NNA, the contractile activity and responses displayed a significantly greater enhancement compared to controls. The pharmacological characterization of EFS contractile responses showed that a cooperative-like interaction between cholinergic muscarinic and tachyldnergic neurokinin 1 and 2 receptors mediated transmission in DUMC of TNBS rats vs a simple additive interaction in controls. CONCLUSION： The results of this study show that, during TNBS-induced acute distal colitis, circular muscle intrinsic contractile mechanisms and possible enteric neural excitatory activity are inhibited in the distended uninflamed mid-colon. Suppression of NO synthesis markedly improves spontaneous and evokes muscle contractions, in spite of any evident change in local NO activity. 2005 The WJG Press and Elsevier Inc. All rights reserved

Climate change and glacier area variations in China during the past half century

Glacier variations in the Tibetan Plateau and surrounding mountain ranges in China affect the livelihood of over one billion people who depend on water from the Yellow, Yangtze, Brahmaputra, Ganges and Indus rivers originating in these areas. Based on the results of the present study and published literature, we found that the glaciers shrank ：5.7% in area from 1963 to 20：0 with an annual area change of -0.33%. The shrinkage generally decreased from peripheral mountain ranges to the interior of Tibet. The linear trends of annual air temperature and precipitation at 147 stations were 0.36℃（10a）^-1 and 8.96 mm （10a）^-1 respectively from 1961 to 2010. The shrinkage of glaciers was well correlated with the rising temperature and the spatial patterns of the shrinkage were influenced by other factors superimposed on the rising temperature such as glacier size, type, elevation, debris cover and precipitation.

Drying Shrinkage of Cement-Based Materials Under Conditions of Constant Temperature and Varying Humidity

Currently,deformations along the central axis of specimens were usually measured under fixed environmental conditions. Seldom were the effects of environmental factors on the drying-shrinkage deformation of cement-based ma-terial considered. For this paper,the drying-shrinkage deformation at different w/b ratios and different additions to mor-tars was investigated under different environments at a temperature of 20 ℃ and humidity ranging from 100% to 50%. The specimens were cured in water for 28 days before measurement. The results illustrate that mortar shows much less shrinkage under various drying conditions when a lower w/b ratio is adopted. With a decrease in relative humidity the speed of drying-shrinkage becomes gradually lower. The addition of silica fume reduces the drying-shrinkage of mortar under higher relative humidity,because the pore structure of mortar with silica fume becomes more refined. The addi-tion of fly ash increases the total porosity and the volume of coarse pores in the mortar. The drying-shrinkage of mortar under different conditions increases with the addition of more of fly ash.

Kinetics of Reductive Leaching of Low-grade Pyrolusite with Molasses Alcohol Wastewater in H_2SO_4

The kinetics of reductive leaching of manganese from low grade pyrolusite in dilute sulfuric acid in the presence of molasses alcohol wastewater was investigated. The shrinking core model was applied to quantify the effects of reaction parameters on leaching rate. The leaching rate increases with reaction temperature, concentrations of H 2 SO 4 and organic matter in molasses alcohol wastewater increase and ore particle size decreases. The leaching process follows the kinetics of a shrinking core model and the apparent activation energy is 57.5 kJ·mol –1 . The experimental results indicate a reaction order of 0.52 for H2SO4 concentration and 0.90 for chemical oxygen demand (COD) of molasses alcohol wastewater. It is concluded that the reductive leaching of pyrolusite with molasses alcohol wastewater is controlled by the diffusion through the ash/inert layer composed of the associated minerals.

Theoretical and experimental study of initial cracking mechanism of an expansive soil due to moisture-change

Swelling and shrinkage due to moisture-change is one of the characteristics of the expansive soil,which is similar to the behavior of most materials under thermal effect,If the deformation is restricted,stress in expansive soil is caused by the swell-shrinking.The stress is defined as "moisture-change stress" and is adopted to analyze swell-shrinkage deformation based on the elasticity mechanics theory.The state when the total stress becomes equal to the soil tensile strength is considered as the cracking criterion as moisture-change increases.Then,the initial cracking mechanism due to evaporation is revealed as follows:Different rates of moisture loss at different depths result in greater shrinkage deformation on the surface while there is smaller shrinkage deformation at the underlayer in expansive soil;cracks will grow when the nonuniform shrinkage deformation increases to a certain degree.A theoretical model is established,which may be used to calculate the stress caused by moisture-change.The depth of initial cracks growing is predicted by the proposed model in expansive soil,A series of laboratory tests are carried out by exposing expansive soil samples with different moisture-changes.The process of crack propagation is investigated by resistivity method.The test results show good consistency with the predicted results by the proposed theoretical model.

Effective stress law for rock masses and its application in impoundment analysis based on deformation reinforcement theory

Reservoir impoundment is related to several hydraulic engineering concerns,including irreversible valley contractions,landslides and reservoir-induced earthquakes.However,these phenomena,such as valley contractions,are hardly to be explained by the conventional method.The scientific understanding of water effects during impoundment and their hazards to hydraulic structure are needed.The effective stress law for fissured rock masses is introduced in the elasto-plastic model employing the Drucker-Prager criterion and implemented in the three dimension(3D)nonlinear finite element method(FEM)program Three-dimensional FINite Element(TFINE).The slope deforms towards river-way during impoundment since the increasing pore pressure in fissures changes stress state and leads to additional plastic deformation in the rock materials.The value of Biot coefficient and the influence of water on rock materials are discussed in detail.Thus,the mechanism of slope deformation during the impoundment of Jinping-I arch dam is revealed,and the deformation is accurately measured.The application of the effective stress law provides a method to consider stress assessment,deformation evaluation and stability estimate of hydraulic structures during the impoundment process.This is a beneficial exploration and an improvement of hydraulic engineering design.

Effects of long term hydrophilic bile acid therapy on in vitro contraction of gallbladder muscle strips in patients with cholesterol gallstones

AIM:To evaluate ursodeoxycholic acid (UDCA) therapy on the in vitro contraction of gallbladder smooth muscle strips from cholesterol gallstone patients. METHODS:The contraction forces of gallbladder smooth muscle strips from 28 patients with cholesterol gallstones treated with UDCA were compared with contraction forces from 14 untreated patients. The strips were stimulated with increasing concentrations of cholecystokinin-8 (CCK-8). RESULTS:Although the contraction forces that developed in response to CCK-8 were higher in strips from specimens of UDCA treated patients compared to untreated patients,longer treatment periods (6-wk) caused more contraction responses than the short treatment period of 3-wk (F = 19.297,1.85 ± 0.22 g vs 1.70 ± 0.10 g,P < 0.01). Contraction forces developed with maximal stimulation with KCl in the 6-wk treatment group were also higher than contraction forces in the untreated group (F = 4.274,3.77 ± 0.45 g vs 3.30 ± 0.30 g,P < 0.05). CONCLUSION:Six-week UDCA treatment caused an increase in contractions of muscle strips from patients with cholesterol gallstones when compared to shorter treatment administration or controls. We suggest that extending UDCA treatment periods may cause more effective contractions in the gallbladder,and thereby increase the rate of response to treatment.