| 1. | The al - resistant ability of barley may be assessed by their critical concentrations
进一步的实验表明， vc能明显抑制铝毒诱导的sce 。 |
| 2. | Influencing factors of serum uric acid and the critical concentration of serum uric acid to prevent and treat metabolic syndrome in female inhabitants from coastal area of shandong province
山东沿海女性居民血尿酸影响因素及与代谢综合征防治切点的研究 |
| 3. | The critical concentration and critical particle surface area in constant rate section is studied . the floc density pa and the floc equivalent diameter da are calculated on the basis of experimental data and theoretic analysis
研究了等速段的临界浓度、临界颗粒表面积；分析计算了絮团密度_ 、泥沙絮团当量直径d _ 。 |
| 4. | 5 . the injury degree of so2 on plant is a funition of the exposure time and so2 concentration . the injury critical concentration depends on the exposure time , and the time length is closely relevant to so2 concentration
植物受so _ 2的伤害程度是暴露时间和so _ 2浓度的函数，其中伤害的临界浓度取决于暴露时间，而其时间的长短与so _ 2浓度密切相关。 |
| 5. | Under different al concentrations , there are same change curves of sce rates hi cv . 2000 - 2 and cv . humai 16 , but their critical concentrations , which can induce the highest sce rates , were significantly different from each other
经不同铝浓度处理，这两个品种的sce率具有相类似的变化曲线，但两者的临界浓度(诱导sce率最高的浓度)显著不同(分别为10和320 mol l ) 。 |
| 6. | The critical concentration of mannitol stress is 0 . 8 - 0 . 9mol - l - 1 . the maximal level of aba accumulation is attached after 5 hours " treat with 0 . 9mol - l - 1 mannitol solution . cell wall plays important roles in tobacco cells perception to osmotic stress
渗透胁迫诱导aba积累的水平与胁迫处理的浓度和时间相关，胁迫处理的有临界浓度为0 . 8 ? 0 . 9mol ? l ~ ( - 1 ) ， aba积累水平在胁迫处理5小时后达到最大。 |
| 7. | Abstract : methanesulfonic acid method was used to prepare five acylated chitins . except heptanoyl chitin , four of them , i . e . acetyl chitin , propionyl chitin , butyryl chitin and hexanoyl chitin , had high degree of substitution ( from 1 . 5 to 2 . 0 ) and exhibited lyotropic liquid crystalline behavior and cholesteric phase . as the length of the side chain increased the critical concentration ( w / w ) somewhat increased from 0 . 21 to 0 . 26 because the chain rigidity dropped . the critical concentration values of all the four derivatives were much higher than that of chitin ( 0 . 12 ) due to the decrease of intramolecular hydrogen bonds . the four acylated chitin can form typical banded texture after being sheared . there minimum concentrations to form banded texture of them were evidently different , varied from 0 . 25 ( for acetyl chitin ) to 0 . 37 ( for hexanoyl chitin ) . these results further indicated that liquid crystallinity decreased while the length of flexible side substituents increased
文摘:四种羧酰化甲壳素即乙酰化、丙酰化、丁酰化和己酰化甲壳素在二氯乙酸溶液中均呈现胆甾型溶致液晶相.临界浓度随侧基长度增加而略有增加，衍生物的临界浓度明显都比原甲壳素高许多，这些规律都可以用链刚性的变化来解释.四种羧酰化甲壳素在剪切时均能形成条带织构，而且能形成条带织构的最低浓度有明显差别，随侧基长度增加而提高，进一步表明侧基较长，液晶性减少 |
| 8. | For chitosan , when the concentration of chitosan is under 0 . 1mg / ml , the structure of molecular chain can be observed by afm . at the same time , the refined structure of lyotropic liquid crystal of chitosan and the changes of structure were studied . films with liquid crystalline texture can be prepared from diluted solutions which concentration is lower than critical concentration of liquid crystal
对于壳聚糖( chitosan ) ，通过afm直接对壳聚糖进行分子结构水平的观察研究，发现在浓度低于0 . 1mg ml的稀溶液中用afm可以清楚观察到糖链间形成的环状或螺旋结构，以及链内侧枝绕合排列的树枝状结构，这种现象是由于糖链间和糖链内的氢键缔合所致。 |
| 9. | Some cubic perovskites are good cases in point such as srtio3 and ktao3 . experimental results show that when ba2 + and li + are doped into the above materials respectively and at the same time the impurity content is higher than their critical concentration , the impurity induced ferroe lectric phase transition occurs
Srtio _ 3和ktao _ 3是典型的量子顺电体，实验表明当两者分别掺杂ba ~ ( 2 + )和li ~ +且杂质浓度超过各自的临界浓度时，顺电相不再稳定，出现由杂质导致的铁电相变。 |
| 10. | The his - tagged peacl - gfp purified from the supernatants could polymerize into green fluorescent filamentous structures with diameter , length and shape being identical to that of muscle f - actins , which could be labeled by tritc - phalloidin ( a specific agent for staining actin microfilaments ) , and were identified as having a 9 nm diameter by negative staining , corresponding with that of the muscle f - actins ( 7 - 10 nm ) . under polymerization conditions , his - tagged peacl - gfp polymerized with kinetics similar to those of skeleton muscle actin , that is , an obvious lag nucleation period at the beginning of polymerization and an s - like typical polymerization curve could be obtained . the critical concentration is 0 . 75 umol / l near to that of chicken muscle actin ( 0 . 56 umol / l ) under the same condition
荧光标记结合荧光显微观察表明：从可溶性上清中纯化的his - taggedpeac1 - gfp聚合形成的微丝不仅可以直接在荧光显微镜下观察，也可被微丝的特异标记物鬼笔环肽所标记，而且其直径、长度以及形态上与已知的聚合肌动蛋白荧光丝一致；电镜负染的结果进一步证实其直径为9nm ，与传统微丝直径相当( 7 ? 10nm ) ；聚合曲线有明显的停滞期，为典型的s型聚合曲线，聚合临界浓度为0 . 75 mol l ，这一结果与已有报道相似。 |
