浓度测定

First,through monofactorial experiment,we studied the influences of pH,temperature and substrate concentration on acidic trehalase activity of baker's yeast.

首先通过单因素实验研究了pH值、温度、底物浓度对面包酵母酸性海藻糖酶活性的影响，然后通过正交试验得出了酸性海藻糖酶活性测定的适宜条件：海藻糖浓度1.6%、温度30℃、pH 4.0、酵母菌泥接种量为0.02g/mL。

First, through monofactorial experiment, we studied the influences of pH, temperature and substrate concentration on acidic trehalase activity of baker's yeast. Then we designed an orthogonal experiment to detective the optimal condition of ascertaining acidic trehalase activity. The optimal conditions are: substrate concentration 1.6%, pH 4.0, temperature 30 and seed volume 0.02g/mL compressed yeast.

首先通过单因素实验研究了pH值、温度、底物浓度对面包酵母酸性海藻糖酶活性的影响，然后通过正交试验得出了酸性海藻糖酶活性测定的适宜条件：海藻糖浓度1.6%、温度30℃、pH 4.0、酵母菌泥接种量为0.02g/mL。

The influence of various parameters on clean-up of neomycin in milk, including the concentration of trichloroacetic acid, centrifugation speed, the flow rate and the concentration of eluent, were investigated.

考察了三氯乙酸浓度、离心力的大小、样品过固相萃取柱的速度以及洗脱剂浓度等因素对牛奶中新霉素测定结果的影响。

Objective:To explore the relationship of negative schizophrenic cognitive function improvement with HVA and 5-HIAA, Method:Thirteen negative schizophrenic patients were treated with clozapine for 8 weeks,Memory,attention,executive function were assessed separately with Waise memory scale,cancellation test and Wisconsin card sorting test before and after treatment,and cerebrospinal fluid HVA and 5-HIAA levels were determined with HPLC-ECD, Results:Part of short memory was improving with decreasing of HVA or increasing of 5-HIAA,while significant correlation were not found between improvement of memory quotient,attention,executive function and change of HVA,5-HIAA, Conclusion:The great part of negative schizophrenic cognitive function improvement has marked correlation with change of DA and 5-HT

目的：探讨阴性精神分裂症认知功能的改善与HVA和5-HIAA变化的关系。方法：对13例阴性精神分裂症在氯氮平治疗前和治疗8周后分别采用韦氏成人记忆量表，数字划消测验和威斯康星卡片分类测验(Wisconsin card sorting test，WCST)评估其记忆、注意及执行功能，采用高效液相色谱-电化学检测测定其治疗前和治疗后脑脊液中DA代谢产物高香草酸和5-HT代谢产物五羟吲哚乙酸(5-HIAA)的浓度。结果：部分短时记忆随HVA降低或5-HIAA的增高而改善。而总的记忆商数，注意及执行功能的改善与HVA和5-HIAA的变化无明显相关。结论：大部分阴性精神分裂症认知功能的改善与DA和5-HT浓度变化无明显相关。

Results: Solution concentration range depended on 0.5~50 mg/L lineaity, relation fine, the relevance modulus amounted to 0.999 without exception. The soursulfan acet ophenetidin ilamide potassium, benzoic acid, dehydro aectic acid, sorbic acid, saccharin sodium minium inspects up out tickness being 0.062, 0.074, 0.066, 0.370, 0.105mg/L The standard deviation was smaller than 5.0%. The additive hit hack rate was 96.8% in drink pickle and the nature bean product fermenting 101.6%.

结果：本方法测定食品中5种添加剂，溶液浓度范围在0.5~50mg/L线性关系良好，相关系数均达0.999；乙酰磺胺酸钾、苯甲酸、脱氢乙酸、山梨酸、糖精钠最小检出浓度分别为0.062，0.074，0.066，0.037，0.105mg/L；标准偏差均小于5.0%；饮料、酱菜和发酵性豆制品中添加剂的回收率为

The conclusions were that the inhibitory effect of SM was the result of inhibiting the mitosis of cells and the cellular cycle be at a standstill in G2-M stage.

应用流式细胞光度分析法测定丹参和川芎嗪对体外培养的瘢痕成纤维细胞DNA相对含量和细胞周期时相变化，发现药物在一定浓度作用下，DNA指数无明显变化；丹参使C2-M期细胞分布增多，C2-M期延长；川芎嗪使C2-M期细胞分布增多，C2-M期、S期延长；药物使细胞群体倍增时间延长，与浓度呈明显直线正相关。

The effect of impurity H2SO4 in the simulating wet-process phosphoric acid on the rheological behavior of the ammoniated slurry was studied.

用化学试剂配制不含铁的模拟湿法磷酸，在其铝，镁，氟杂质浓度固定的条件下，改变硫酸杂质的浓度，在50 ℃下测定其氨化料浆的流变曲线。

To determine the concentrations of berberine hydrochloride,chlorogenic acid and baicalin in rabbit body fluid and their minimal inhibitory concentrations respectively,and to clarify the relationship between the heat-clearing and detoxicating function of the three Chinese herbal medicinal ingredients and their bacteriostatic actions.

测定盐酸小檗碱、绿原酸和黄芩苷在兔体液内浓度，及各成分体外最小抑菌浓度，阐明3种中药成分清热解毒功能与其抑菌作用的关系。

In waters of different electrolyteconcentrations and at different SAR,clay from brown soil flocculated when one of thecation's concentration at least in the electrolyte is higher than its critical coagulationconcentration.

用同样的方法测定电解质浓度和钠吸附率对棕壤粘粒凝聚的影响，发现只有当电解质组成中的某一种离子的浓度超过它的相应的絮凝临界值时，悬浮液才发生絮凝。

Treated fresh carnation cut flower and rose cut flower with salicylic acid of different density 20mgL^(-1 and 40mgL^(-1) and 60mgL^(-1) and 80mgL^(-1) and 100mgL^(-1), it was studied the influence and the value of moisture equilibrium of fresh heavy change rate for carnation. The result as follows:(1) The carnation cut flowers of tested with SA of different density, fresh weight presented drop after rising tendency.

用不同浓度的水杨酸20mgL^(-1、40mgL^(-1)、60mgL^(-1)、80mgL^(-1)、100mgL^(-1)作保鲜液来处理康乃馨切花，测定SA对康乃馨切花鲜重变化率的影响及水分平衡值的影响；结果如下：(1)不同浓度SA处理的康乃馨切花，鲜重都呈现先上升后下降的趋势。

She gently rebuff ed him, but agreed that they could be friends

她婉言拒绝了，但同意作为朋友相处。

If in the penal farm, you were sure to be criticized.

要是在劳改农场，你等着挨绳子吧！