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Hertwig's epithelial root sheath degenerates immediately after root dentin is formed.

上皮根鞘在根部牙本质形成后迅速蜕变。

BACKGROUND: Studies demonstrated that incisor continuously growing is due to lack of epithelial root sheath formation. However, researches regarding whether receptor activator of nuclear factor κB ligand and osteoclast has correlation with continue root development is poorly understood.

背景：研究表明小鼠不断生长的切牙是由于切牙仅有颈环而无上皮根鞘的形成，但是破骨细胞分化因子核因子κB受体活化剂配体和破骨细胞与不断生长的牙根发育是否相关，目前研究较少。

Hair follicle composed of epithelial compartment (outer root sheath, inner root sheath) and mesenchyme compartment dermal pap...

毛囊由属上皮成分的内、外根鞘和属真皮成分的真皮鞘与毛乳头组成，是一个很值得深入研究的皮肤附属结构。

Immunohistochemistry was applied for further investigating the expression and location of this gene in Alpaca skin. Results showed that positive expressions of AIF were found in hair root, root sheath, hair bulb, and dermal papilla, with higher expression in brown skin than grey skin. Our findings indicated that the gene could be related to the establishment of Alpaca coat color and hair growth.

运用免疫组化技术进一步研究该基因在羊驼皮肤中的表达和定位，结果显示AIF在羊驼毛囊的毛根、根鞘、毛球、毛乳头位置均呈阳性表达，且棕色皮肤比灰色皮肤表达量高，提示该基因可能和羊驼毛色形成或毛的生长相关。

The influence on the content of Zn~(2+) is not too. The maize seedling have the mechanism of Na~+-exclusion and have definite salt tolerance, the salt tolerance was implemented by root and mature sheath, Na~+ is mainly reserved in root and mature sheath, and the content of Na~+ was less to be transported to mature blade and young blade.

玉米幼苗具有拒Na~+机制，具有一定的耐盐性，它的耐盐性是根和成熟叶叶鞘来实现的，Na~+主要贮存在根系和成熟叶叶鞘中，而向成熟叶叶片和生长叶中运输较少。

Nodule number in main root decreased and increased in lateral root gradually and nodule peak occurred in mid- August.

而侧根上的根瘤数量则不断增加，在8月中旬开始出现结瘤高峰。

The results indicated: the nitrogen of root,stem and leaf was mainly from soil and fertilizer nitrogen at growth stage,and the nitrogen from root nodule azotification started and increased at later growth...

结果表明，在大豆生育前期土壤氮和肥料氮是根、茎、叶片氮素的主要来源，在生育后期根瘤固氮开始增加；随生长大豆荚果氮素中土壤氮所占比例逐渐减小，根瘤固氮所占比例逐渐增加，并在收获期(R8)达到总量的70.6%，肥料氮所占比例一直很低。

The results indicated: the nitrogen of root,stem and leaf was mainly from soil and fertilizer nitrogen at growth stage,and the nitrogen from root nodule azotification started and increased at later growth stage.

结果表明，在大豆生育前期土壤氮和肥料氮是根、茎、叶片氮素的主要来源，在生育后期根瘤固氮开始增加；随生长大豆荚果氮素中土壤氮所占比例逐渐减小，根瘤固氮所占比例逐渐增加，并在收获期(R8)达到总量的70.6%，肥料氮所占比例一直很低。

The use of desulphurisation product stimulate peanut's root nodule in special way, on the condition that the rate of desulphurisation products reaches 1 percent, 5 percent and 10 percent, the quantity and weighty of root nodule is increased

结果表明，在广东浅海沉积砖红壤上，施用脱硫副产物对盆栽花生出苗、根系及其营养生长、花生花针生长发育等均产生一定的抑制作用；抑制程度与脱硫副产物施用量有关。

Uses the soil bonsai to carry on the root nodule bacteria and the alfalfa highly effectiveparagenesis match experiment, in the simulation production practice the big field soil environment,conducts the research to the root nodule bacteria in soil compatibility.

采用土壤盆栽进行根瘤菌与紫花苜蓿高效共生匹配试验，模拟生产实践中大田的土壤环境，对根瘤菌在土壤中的适应性进行研究。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷