阻滞

In a study by Kaplan et al.32 conducted in 18 asymptomatic volunteers, the authors found that properly performed MBB result in failure to anesthetize the corresponding facet joint 11% of the time, even with the avoidance of venous uptake.

Kaplan等人对18名无症状的志愿者进行研究，恰当的性MBB后，在避免静脉吸收情况下，相关小关节阻滞失败率为11%。

Meanwhile, the concentration of Pb,Zn and other heavy metals is rather high in the oxidation zone and decreasesdownward to levels that are unbelievably low for Pb-Zn mine tailings. Theseobservations suggest that heavy metals should be re-immobilized by secondaryminerals, rather than primary minerals, in the oxidation zone, and could be leachedout from suboxic environment due to low rate oxidative dissolution which preventsthe precipitation of secondary minerals in significant amount. Thus, cover scenarioswhich establish a suboxic environment beneath the cover layer might not always beeffective in preventing heavy metal release from mine tailings.Sequential extraction studies indicate that, in addition to heavy metal leaching,oxidation of the mine tailings increased the mobility of residual Zn, and Cu, while Pb remains immobile due to the formation of anglesite (PbSO4). Using the seven-step extraction technique developed by Dold (J. Geochem. Explor., 2003, 80: 55-68), galena dissolves in significant amount at step 2 most probably due to the strong complexing of Pb2+ by acetate, while other metal sulfides dissolve at step 6, which suggest that this extraction technique could not be used to evaluate the mobility of lead in natural environment

重金属含量均低于新鲜尾矿，但以硬化层中的含量最高(Pb、Zn含量分别为0.47%和0.93%)，往下大幅度降低，表明尾矿风化过程中形成的次生矿物对Pb、Zn等重金属元素有较强的固定作用，而次氧化带的淋溶作用造成了金属元素的大量流失；(4)与新鲜尾矿相比，硬化层中铅的可迁移性大大降低，硬化层之下尾矿样品中铅的可迁移性也不同程度降低，这是由于硫化物氧化产生的硫酸根与尾矿中的铅反应形成铅矾(PbSO_4)的缘故；(5)氧化作用使尾矿中的zn、Cu等重金属的可迁移性不同程度地增大，其中对锌的可迁移性影响最大，铜的可迁移性与铁比较相似，铅则容易与硫化物氧化形成的SO_4~(2-)反应形成铅矾(PbSO_4)；(6)为了减少尾矿污染和修复矿山环境，人们提出了各种不同的尾矿覆盖方案，本文的研究结果表明，这些方法不一定能够有效地阻滞污染元素的迁移。

Sulfonamide anilide compound could inhibit human bladder cancer cell growth in vitro, most likely through induction of P21(superscript waf/cif1) mRNA expression and subsequent arrest of cell cycling at G1 phase.

Compound在体外能有效抑制对传统化疗耐药的人膀胱癌细胞生长，其抗肿瘤生长机制可能是通过上调P21(上标 waf/cif1)mRNA水平从而使细胞阻滞于G1期所致。

OBJECTIVE:Calcium antagonist is one of vasodilating agents that widely used in clinic.

目的：钙通道阻滞剂是临床上最常用的血管扩张剂之一。

Objective To observe the protective effect of α-receptor antagonist against aging process in rats.

目的 观察α－受体阻滞剂对大鼠球囊功能老化的保护作用。

Objective To asses the effect of anticholinergic agent on the treatment of child asthma and to study the changes in peak expiratory flow rate.

目的 观察抗胆碱能受体阻滞剂在儿童哮喘治疗中的作用及肺功能呼气峰流速的变化。

Methods Seven patients [4 women and 3 men,mean age (32±16) years] with antidromic atrioventricular reentrant tachycardia having a left bundle branch block pattern underwent electrophysiologic evaluation and radiofrequency catheter ablation.

方法对 7例患者，其中男性 3例，女性 4例，平均年龄(32± 16 )岁左束支阻滞图形的逆向型房室折返性心动过速患者进行电生理检查和射频消融治疗。

ChinaObjective:To study the antitoxic role of vesicular monoamine transporter 2 (VMAT2) in transpgenic Chinese Hamster ovary cell.Methods:With the technology of transgene from PC12 to CHO,MTT reduction assay was used to detect MPP^+ toxic effect on wild type CHO and transgenic CHO.

利用转PC12细胞基因到CHO细胞中形成的转基因CHO细胞（cDNACHO，采用MTT比色法检测1-甲基-4-苯基吡啶离子（MPP^+对CHO细胞野生株（wtCHO和cDNACHO细胞的毒性作用，并观察利血平-VMAT2的特异性阻滞剂对MPP^+毒性作用的影响。

Shensongyangxin capsule can block Ik1 ,Ito and Ik,which may contribute to its anti arrhythmic effect.

参松养心胶囊干粉提取溶液对IK1，Ito和Ik均具有不同程度的阻滞作用，这可能是其抗心律失常药理机制的一部分。

Shensongyangxin capsule can block Ik1,Ito and Ik,which may contribute to its anti arrhythmic effect.

参松养心胶囊干粉提取溶液对IK1，Ito和Ik均具有不同程度的阻滞作用。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。