三价

In order to investigate the capabilities of zircon as waste forms for immobilizing simulated trivalent actinides, trivalent europium (Eu3+) was used as the simulacrum for trivalent actinides, the waste forms containing 20 mol% Eu3+ were successfully synthesized by high temperature solid reaction and using ZrO2, SiO2 and Eu2O3 powders as starting materials.

中文摘要：为研究锆英石基三价锕系模拟核素固化体的性能，利用Eu3+作为三价锕系核素模拟替代物质，以ZrO2、SiO2和Eu2O3粉体为原料采用高温固相法制备了包容Eu3+为20mol%的锆英石基固化体。

Thress homologous chromosomes of trisomics associated as a trivalent or a bivalent and a univalent or three univalent during diakinesis and metaphase 1 ;Laggard chromosome and univalent separated in advance at anaphase I ,leading to distribution of 10-1-10,9-12,11-11,10-2-10,10-12,10-10,9-1-11 besides 10-ll;And there was distribution of 11-11-10-10, 10-10-10-12, 10-10-10-11, 10-11-11-11, 11-11-10-9, 10-10-10-10, 9-12-10-10, 9-9-11-11, 11-10-10-9, 12-10-9-11, 11-9-9-13, 10-10-10-9 at anaphase II ;n l microspore frequency were different of four trisomics.

三体在终变期和中期Ⅰ，3个同源染色体联会成三价体，或2个联会成二价体和1个单价体，或3个都为单价体；后期Ⅰ出现落后染色体或单价体提前分离，导致除10-11式分离外，还有10-1-10，9-12，11-11，10-2-10，10-12，10-10，9-1-11等不均衡分离方式；后期Ⅱ有11-11-10-10，10-10-10-12，10-10-10-11，10-11-11-11，11-11-10-9，10-10-10-10，9-12-10-10，9-9-11-11，11-10-10-9，12-10-9-11，11-9-9-13，10-10-10-9等分离方式；4个三体中的n 1小孢子频率不同。

According to AAS data, Fe, Ni and Mn in pits dissolved into ions in form of divalence, and Cr in form of trivalence both in the presence and absence of PD.

结果表明：304不锈钢蚀孔内，铬元素以三价，铁、镍和锰以二价离子形式溶解，缓蚀剂PD不改变各元素溶解的价态。

Set down 300,000 yuan, strong-you Qinghe Metro 85 packs, average price of 16,000 yuan / square meter Poly Lily Garden introduced 36 sets of two-bedroom 79 square meters per square meter 13100-13500 yuan,万象新天average price of 13,000 yuan per square meter from 9343 yuan down to the south …… Seeing a sound property market down, the capital developer discounts, price, and finally no longer hold still pipa half-face, and the development of many renowned enterprises loosening the price the ice, but a drop is三四千million.

珠江御景每套降30万元，强佑清河新城85折，均价1.6万元/平方米的保利百合花园推出36套79平方米两居室，每平方米1.31万到1.35万元，万象新天均价从每平方米13000元降到9343元……眼看南方楼市降声一片，京城开发商的打折、降价，终于不再犹抱琵琶半遮面了，不少知名开发企业也松动了价格坚冰，而且一降就是三四千元。

Results showed that the PMC meiosis of autotetraploid was similar to the diploid except some particularities. In metaphase Ⅰ, multivalent, quadrivalent, trivalent, bivalent and univalent were observed and some of the chromosomes were found not to rank on the metaphase plate and so did in metaphase Ⅱ cells. In anaphase Ⅰ and anaphase Ⅱ cells, there were lagging chromosomes, chromosome bridge and fragment. During anaphase Ⅱ and telophase Ⅱ, chromosome segregation was not synchronous or equal. At tetrad stage, dyad, triad, tetrad with micronucleus and polyad appeared.

结果表明，同源四倍体花粉母细胞减数分裂过程与二倍体相比，中期Ⅰ染色体构型复杂，有多价体、四价体、三价体、二价体和单价体；中期Ⅰ及中期Ⅱ有部分染色体没有排列在赤道板上；后期Ⅰ及后期Ⅱ出现落后染色体、染色体桥及断片；后期Ⅱ和末期Ⅱ有染色体不同步分离及不等分裂的现象；四分体时期还出现二分体、三分体、含微核的异常四分体及多分体。

We studied trivalence chromium ion electrode reaction on three different surface state by cyclic voltammetry, discussed electrode activation influence on electrode reaction, and analysed the mechanism of electrode reaction. We discussed current efficiency during the first charge process and charge/discharge cycle performance by invariable current charge method.

应用循环伏安法考察了三价铬离子在三种不同表面状态石墨电极上的电极反应，探讨了电极表面活化处理对三价铬离子的电极反应的影响，并分析了电极反应的机理；采用恒电流充电的方法探讨铬液流电池初次充电过程的电流效率及恒电流充/放电循环的性能。

Chlororespiring, sulfate-reducing bacterium Desulfovibrio dechloracetivorans strain SF3 is capable of dissimilatively reducing Fe, Cr and Co.

还原脱氯，脱硫细菌Desulfovibrio dechloracetivorans strain SF3可异化还原三价铁，六价铬和三价钴。

While high quality deposition from trivalent chromium electrolyte could only be sustained for short periods and thin deposits obtained of decorative value only, it is difficult to substitute heaxvalent chromium plating in engineering electrodeposits by trivalent chromium plating at all.

因此，本文在电沉积出镍-铁合金纳米晶的基础上，采用脉冲电沉积的方法研究了在三价铬体系中获得纳米晶铬和铬-镍-铁合金纳米晶厚镀层的工艺及其基础理论，以期解决三价铬镀液完全代替六价铬电镀的难题。

The reduction of the chromium oxide particles within the iron matrix is affected by factors that include the diffusion of the reduced chromiu....

铬主要以两种价态稳定的存在於自然界中，分别是三价铬以及六价铬，六价铬被认为是具有较强的生物毒性。

To acquire iron, many plants reduce Fe to Fe in soil by ferric-chelate reductases, which is an obligatory process for the iron acquisition.

为了获取铁元素，许多植物都将三价铁还原为二价铁后再吸收，由三价铁还原酶参与的还原过程是植物从土壤中获取铁的限速过程。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。