传统书画文物保护修复中“大浆”与“小浆”的特性研究

本文以传统书画装裱常用黏合剂“大浆”与“小浆”为研究对象,研究了两种浆糊糊化过程中,不同温度下的偏光十字及黏度变化规律,比较了保存过程中两者黏度的变化规律;并以两种浆糊为黏合剂,模拟了书画装裱过程中的部分工序,制备了系列纸样,探讨了两种浆糊制备的纸样在纸张性能方面的差异;以期在同样的条件下,找出两者的差异性,从而为现代书画修复中,传统书画修复科学用糊提供一定的参考依据。

小浆苹果解冻方式对果泥品质的影响

利用微波加热法,通过解冻冷冻小浆苹果得出所得到的果泥具有较高的理化和感官指标,这使得地方性原料的冷冻储存得到推广,从而延长其保存期限,保障西伯利亚地区的加工企业可以在全年进行生产。

S303八洋线小浆隧道衬砌病害成因分析与治理措施

隧道病害是公路隧道交通效能发挥的最重要、最突出阻碍之一,为确保隧道结构及运营安全,对小浆隧道衬砌病害进行成因分析和治理,为隧道的安全运营及发展奠定良好的基础。

Load-bearing characteristics and energy evolution of fractured rock masses after granite and sandstone grouting

Experiments on grouting-reinforced rock mass specimens with different particle sizes and features were carried out in this study to examine the effects of grouting reinforcement on the load-bearing characteristics of fractured rock mass.The strength and deformation features of grouting-reinforced rock mass were analyzed under different loading manners;the energy evolution mechanism of grouting-reinforced rock mass specimens with different particle sizes and features was investigated;the energy dissipation ratio and post-peak stress decreasing rate were employed to evaluate the bearing stability of grouting-reinforced rock mass.The results show that the strength and ductility of granite-reinforced rock mass(GRM)under biaxial loading are higher than that of sandstone-reinforced rock mass(SRM)under uniaxial loading.Besides,the energy evolution characteristics of grouting-reinforced rock mass under uniaxial and biaxial loading mainly could be divided into early,middle,and late stages.In the early stage,total,elastic,and dissipation energies were quite small with flatter curves;in the middle stage,elastic energy increased rapidly,whereas dissipation energy increased slowly;in the late stage,dissipation energy increased sharply.The energy dissipation ratio was used to represent the pre-peak plastic deformation.Under uniaxial loading,this ratio increased as the particle size increased and the pre-peak plastic deformation of grouting-reinforced rock mass became larger;under biaxial loading,it dropped as the particle size increased,and the pre-peak plastic deformation of grouting-reinforced rock mass became smaller.The post-peak stress decline rate A_(v) was used to assess the post-peak bearing performance of grouting-reinforced rock mass.Under uniaxial loading,parameter A_(v) exhibited reduction as the particle size kept increasing,and the ability of post-peak of grouting-reinforced rock mass to allow deformation development was greater,and the bearing capacity was greater;under biaxial loading,A_(v) increased with the particle size,and the ability of post-peak of grouting-reinforced rock mass to allow deformation development was low and the bearing capacity was reduced.The findings are considered instrumental in improving the stability of the roadway-surrounding rock by granite and sandstone grouting.

北洺河铁矿主溜井的施工技术

北氵名河铁矿主溜井具有围岩不稳定、含水量大、透水性好等特点 ,给施工带来诸多困难 ,面临溜井的施工工期短、任务重、确保工程质量 ,采用了特殊的注浆封堵井筒的渗漏水、导井反井钻进、钻爆法刷大井筒断面等施工技术 。

Effect of Source-sink Change on Photosynthesis and Yield of Wheat

[Objective] The paper aims to explore the influences of source sink change of wheat at different densities on wheat yield.[Method] 225 （D1） and 320 plant/m2（D2） were adopted,then cutting flag leaf （L1）,the second last leaf （L2）,removing upper part of spike （L3） and controlling （CK） were used to conduct field experiment.[Result] The results showed that both of the two densities of wheat＇s 1 000-grain weight and grain filling rate after anthesis in a decreasing order of L3〉CK〉L2〉L1,and the grain weight per spike and dry matter amount translated after anthesis turned to be CK〉L2〉L1 〉L3.[Conclusion].Both of leaf-cutting and spikelet removing decreased the grain weight per spike and dry matter amount translated after anthesis.Removing upper part of spike increased wheat＇s 1 000-grain weight.But the decreasing of the sink and dry matter amount translated contributed to the decreasing of the yield of wheat.

Effects of Sulfur Fertilizer Application Methods on Grain Protein Content During Filling Stage of Winter Wheat

[ Objective] The experiment aimed to provide a theoretical base of optimal cultivation management for the high yield and good quality and high efficiency of winter wheat. [ Method] The effects of two sulfur fertilizer application methods on dynamic changes of grain protein content and glutenin content of Yumai 49 and Yumai 66 during wheat grain filling stage were studied under the field conditions. [Result] Both the grain protein and glutenin content of two cultivars were increased by sulfur fertilizer, particularly, the effects on Yumai 49 were more significant.[ Conclusion] The grain content and glutenin content of different wheat cultivars could be increased by taking different sulfur fertilizer application methods.

Effect of Different Aromatic Fractions on Colloidal Property of Tahe Atmospheric Residue

Different amounts of FCC slurry oil and HVGO were added to Tahe atmospheric residue respectively. The colloi- dal stability and asphaltene agglomeration of atmospheric residue and mixed oils were characterized by means of the mass fraction normalized conductivity and the small-angle X-ray scattering technology （SAXS）. The results indicated that the sta- bility of Tahe atmospheric residue decreased with an increasing amount of these oil fractions. It was found that the decline of the colloidal stability was attributed to the component polarity difference between oil fractions and the atmospheric resi- due. Though the aromaticity of FCC slurry oil was higher than that of HVGO, the polarity of aromatics and resins of FCC slurry oil was lower than those of HVGO. So the degree of the colloidal stability was more seriously destroyed by FCC slurry oil. The dispersion of asphaltenes in Tahe atmospheric residue was changed by adding FCC slurry oil and HVGO. The particle size of as-ohaltenes increased alon~ with the decline of the colloidal stability

Single dose of intra-muscular platelet rich plasma reverses the increase in plasma iron levels in exercise-induced muscle damage:A pilot study

Background:Platelet rich plasma(PRP) therapy is widely used in enhancing the recovery of skeletal muscle from injury.However,the impact of intramuscular delivery of PRP on hematologic and biochemical responses has not been fully elucidated in exercise-induced muscle damage.The purpose of this investigation the effects of intramuscular delivery of PRP on hematologic and biochemical responses and recovery strategy muscle damage induced by high intensity muscle exercise(exercise-induced muscle damage,EIMD).Methods:Moderately active male volunteers participated in this study and were assigned to a control group(control,n = 6) and PRP administration group(PRP,n = 6).The subjects performed exercise with a load of 80% one repetition maximum(1RM) maximal voluntary contraction of the elbow flexors until point of exhaustion of the non-dominant arm was reached.The arms were treated with saline or autologous PRP post-24 h EIMD.Venous blood samples were obtained in the morning to establish a baseline value and 1–4 days post-exercise and were analyzed for serum ferritin,iron,iron binding capacity(IBC),creatinine kinase(CK),lactate dehydrogenase(LDH),aspartate aminotransferase(AST),and alanine aminotransferase(ALT).Results:The baseline levels of plasma iron,ferritin,IBC,CK,LDH,AST,and ALT were similar in both the control and PRP groups.However,24-h following exercise a significant increase in these parameters was observed in both groups between 1 and 4 days during the recovery period.Interestingly,PRP administration decreased plasma iron levels compared to the control on the second day post-exercise.Plasma IBC increased in PRP group from Days 2 to 4 post-exercise compared to the control group whilst PRP administration had no effect on plasma ferritin,CK,AST,ALT,or LDH.Conclusion:Acute exhaustive exercise increased muscle damage markers,including plasma iron,IBC,and ferritin levels,indicating muscle damage induced by exercise.PRP administration improves inflammation by reversing the increase in the iron levels post-exercise without displaying any myotoxicity and may have a role to play in the recovery of exercise-induced muscle damage.

Determination of Vitamins B2,B3,B6 and B7 in Corn Steep Liquor by NIR and PLSR

Corn steep liquor(CSL) is an important raw material that has high nutritional value and serves as a nitrogen source.Biotin in CSL is especially of great importance to fermentation.In order to develop a fast,versatile,cheap,and environmentally safe analytical method for quantifying vitamins B2(VB2),B3(VB3),B6(VB6) and B7(VB7) in CSL,the near-infrared spectroscopy(NIR) measurements of 66 samples(22 batches) of CSL were analyzed by partial least-square regression(PLSR).Multivariate models developed in the NIR regions showed good predictive abilities for VB2,VB3,VB6 and VB7.Results confirmed the probability of the multivariate spectroscopic approach as a replacement for expensive and time-consuming conventional chemical methods.

小儿热速清糖浆治疗小儿急性上呼吸道感染表里俱热证随机对照多中心研究

目的评价小儿热速清糖浆治疗小儿急性上呼吸道感染表里俱热证的有效性及安全性。方法采用区组随机、双盲双模拟、阳性药对照、多中心的临床研究方法。计划纳入480例,其中治疗组360例服用小儿热速清糖浆与小儿清热宁颗粒模拟剂,对照组120例服用小儿清热宁颗粒与小儿热速清糖浆模拟剂,两组疗程均为5天。比较两组完全退热时间、便秘疗效、中医证候疗效、单项症状消失率、即时退热时间与退热持续时间,安全性指标。结果共纳入468例,其中治疗组352例,对照组116例。全分析数据集(FAS)结果显示,治疗后治疗组与对照组的完全退热中位时间均为48 h,经COX回归模型估计组间风险比(HR)及95%可信区间,在校正中心因素的影响后,按0.67的非劣标准,治疗组非劣效于对照组。治疗后治疗组、对照组便秘总有效率分别为96.54%、88.70%,组间比较差异均有统计学意义(P<0.05);治疗组、对照组中医证候痊愈率分别为46.40%、31.30%(P<0.05)。本研究共发现7例不良事件,治疗组4例(1.15%),对照组3例(2.59%)。结论小儿热速清糖浆治疗小儿急性上呼吸道感染表里俱热证具有缩短热程作用,疗效不劣于小儿清热宁颗粒,且两药的安全性均良好。

Simultaneous determination of five major components of Glycyrrhizae Radix et Rhizoma in Xiaoer Zhike Tangjiang with standardized reference extract

In this study, we developed a novel and simple HPLC-DAD method for simultaneous qualitative and quantitative determination of five major components of Glycyrrhizae Radix et Rhizoma （GRR） in Xiaoer Zhike Tangjiang （XEZKTJ） with standardized reference extract （SRE）. The five analytes （liquiritin apioside, liquiritin, isoliquiritin apioside, liquirigenin and glycyrrhizic acid） were well separated with good linearity, precision, stability and repeatability. The recovery rates ranged from 95.69% to 100.80%. The content of the five compounds in 34 batches of commercial XEZKTJ products was determined using standardized GRR extract （SRE method） and individual chemical reference standards （CRS method）. Highly similar results were obtained from the two methods, demonstrating the feasibility of the proposed SRE method. Taken together, we proposed an efficient and low-cost way to perform multi-component quality control of XEZKTJ in this study.

Plasma thrombopoietin levels in patients with aplastic anemia and idiopathic thrombocytopenic purpura

OBJECTIVE: To evaluate the role of thrombopoietin (TPO) in the pathology of chronic thrombocytopenic disease. METHODS: We measured the endogenous plasma concentration of TPO in 40 patients with acquired aplastic anaemia (AA) and in 32 patients with idiopathic thrombocytopenic purpura (ITP) by a sensitive Sandwich enzyme-linked immunosorbent assay (ELISA) and compared the results. RESULTS: Plasma TPO concentrations were significantly higher in AA patients (774 +/- 393 pg/ ml) in comparison with healthy control subjects (55 +/- 34 pg/ml, P 0.05). There was also no relationship between their plasma TPO levels and platelet counts. CONCLUSIONS: TPO levels may be regulated not only by platelets but also by megakaryocytes in AA and ITP, and measurement of TPO levels is useful for diagnosing thrombocytopenia and understanding the pathophysiology of thrombocytopenia.

小儿智力糖浆治疗儿童短暂性抽动障碍30例临床观察

目的观察小儿智力糖浆治疗儿童短暂性抽动障碍的临床疗效。方法选取2016年7月至2018年2月在曲阜市中医院儿科就诊的短暂性抽动障碍患儿60例,随机分为治疗组和对照组,各30例。治疗组给予小儿智力糖浆治疗,对照组给予盐酸硫必利治疗,2组均治疗3个月为1个疗程,1个疗程后比较2组的临床疗效、中医证候积分和不良反应发生情况。结果治疗组总有效率为90.0%,对照组为93.3%,2组比较,差异无统计学意义(P>0.05)。治疗前,2组中医证候积分比较,差异无统计学意义(P>0.05),具有可比性;治疗后,2组中医证候积分与同组治疗前比较,均有所下降,且治疗组下降更显著,差异有统计学意义(P<0.05)。治疗组总不良反应发生率为6.7%,显著低于对照组的26.7%,2组比较,差异有统计学意义(P<0.05)。结论小儿智力糖浆治疗儿童短暂性抽动障碍疗效满意,可显著减少患儿的抽动症状,改善中医证候积分,且不良反应少,值得临床推广应用。

Proteome changes in the plasma of Papilio xuthus (Lepidoptera:Papilionidae):effect of parasitization by the endoparasitic wasp Pteromalus puparum (Hymenoptera:Pteromalidae)

Although the biochemical dissection of parasitoid-host interactions is becoming well characterized, the molecular knowledge concerning them is minimal. In order to understand the molecular bases of the host immune response to parasitoid attack, we explored the response of Papilio xuthus parasitized by the endoparasitic wasp Pteromalus puparum using proteomic approach. By examining the differential expression of plasma proteins in the parasitized and unparasitized host pupae by two-dimensional (2D) electrophoresis, 16 proteins were found to vary in relation to parasitization compared with unparasitized control samples. All of them were submitted to identification by mass spectrometry coupled with a database search. The modulated proteins were found to fall into the following functional groups: humoral or cellular immunity, detoxification, energy metabolism, and others. This study contributes insights into the molecular mechanism of the relationships between parasitoids and their host insects.

Enhanced plasma factor Ⅷ activity in mice via cysteine mutation using dual vectors

Hemophilia A is caused by a genetic mutation in coagulation factor VIII （FVIII） gene and gene therapy is considered to be a promising strategy for its treatment. We recently demonstrated that co-delivery of two vectors expressing M662C mutated heavy and D1828C mutated light chain genes of B-domain-deleted coagulation factor VIII （BDD-FVIII） leads to inter-chain disulfide cross-linking and improved heavy chain secretion in vitro. In this study, co-injection of both M662C and D1828C mutated BDD-FVIII gene expression vectors into mice resulted in increased heavy chain secretion and coagulation activity in plasma in vivo. Approximately （239＋_56） ng mL-1 above endogenous levels of transgenic FVIII heavy chain was found in mouse plasma using a chain-specific ELISA. For FVIII coagulation activity, approximately （1.09＋_0.25） IU mL-1 above en- dogenous levels were detected in co-injected transgenic mouse plasma using a chromogenic assay. These data demonstrate that inter-chain disulfide bonds likely increase heavy chain secretion and coagulation activity in the plasma of transgenic mice with an improved efficacy of a dual-vector delivery of BDD-FVIII gene. These findings support our ongoing efforts to develop a gene therapy for hemophilia A treatment using dual-AAV vectors.