Experimental human exposure to carbon disulfide

Summary Six human volunteers were exposed to 10 and 20 ppm carbon disulfide at rest and to 3 and 10 ppm carbon disulfide under a 50 W level of physical exercise during four consecutive periods of 50 min. At the start of the experiments, at the end of the exposure periods and during the post-exposure period, urine was sampled and the concentration of 2-thiothiazolidine-4-carboxylic acid (TTCA) was determined. It was established that only a small percentage, ranging from 0.7 to 2.2% of the absorbed carbon sulfide was transformed into TTCA. The excretion rate of TTCA (mol TTCA h^–1) was found to be the best parameter in evaluating the respiratory uptake of carbon disulfide over a range of 37.9 to 163.3 mg CS₂ compared to the urinary concentration of TTCA (mole TTCA ml^–1) or the creatinine corrected concentration of TTCA (mmol TTCA mol^–1 creatinine). The total amount of TTCA (mol TTCA) excreted proved to be independent of the urinary flow (ml h^–1), the estimates of the individual fatty tissue content and the urinary pH. No correlation was found between the respiratory uptake of carbon disulfide (mg CS₂) and the excretion rate of TTCA within each exposure condition of 3, 10 or 20 ppm carbon disulfide, respectively.     

二硫化碳对接触工人心血管系统的影响

目的 探讨二硫化碳(CS2)接触对作业工人心血管系统的影响.方法 选取某化纤厂CS2污染程度不同的、有代表性的车间,对其633名接触CS2作业工人作业场所的CS2浓度进行检测,同时对工人进行血压、心电图、血常规、胆固醇(TCHO)、甘油三酯(TG)等测定;用X2检验和多元logistic回归分析方法,对数据进行统计学处理.结果 作业工人接触CS2水平检测结果显示,共有389名作业工人接触CS2的浓度≤5 mg/m3,244名作业工人接触CS2的浓度＞5 mg/m3,其中接触CS2浓度最高值为15.73 mg /m3.CS2对作业工人的心电图各检查指标、红细胞、白细胞、血小板等指标以及TCHO和TG均无明显影响,对血压有正向影响,对血红蛋白有负向影响;男性CS2接触工人TCHO升高、TG升高及高血压检出率明显高于女性,差异有统计学意义(P＜0.05),年龄≤30岁的CS2接触工人的窦性心律失常、高血压及TCHO升高的检出率均明显高于年龄＞30岁的CS2接触工人,差异有统计学意义(P＜0.05).1≤工龄＜10年组接触CS2工人的窦性心律失常检出率明显高于工龄≥10年工人,1≤工龄＜10年组接触CS2工人的高血压及TCHO升高的检出率明显低于工龄≥10年工人,差异有统计学意义(P＜0.05).结论 CS2接触对心血管系统相关指标未见明显影响.     

Electrocardiographic features of Korean carbon disulfide poisoned subjects after discontinuation of exposure

Objective Mass poisoning by carbon disulfide (CS₂) was reported at a viscose rayon factory in Korea in the late 1980s; the factory was subsequently closed in 1993. In this study, we evaluated the late electrocardiographic features in the CS₂ poisoned subjects. Methods The cases were composed of 198 retired workers with a history of CS₂ poisoning. An age- and sex-matched reference group was randomly selected from people visiting a hospital for regular health checkups. Intervals, amplitudes and abnormal findings from the electrocardiograms (ECGs) of the two groups were compared. Results Except for the PQ interval, there were no significant ECG differences between the two groups. The cases exhibited ECG abnormalities more frequently than the reference group. Multiple logistic regression analysis revealed that CS₂ poisoning was positively associated with the presence of abnormal ECG findings (OR = 1.603; 95% CI, 1.008–2.549). Conclusion This study suggests that CS₂ poisoned subjects may have an increased risk of ECG abnormalities even after the exposure to CS₂ is no longer present.     

二硫化碳对雄性生殖功能的影响

二硫化碳是常见的有毒有害化合物之一。本文着重介绍了二硫化碳对雄性性功能、生殖器官、性激素以及精子生成的影响。     

Mortality of Dutch workers exposed to carbon disulfide

Epidemiological studies carried out in Great Britain, Scandinavia and the United States indicate that workers exposed to carbon disulfide are at an increased risk for cardiovascular disease (CVD) mortality, and in particular for ischemic heart disease (IHD) mortality. In the epidemiological study reported here a retrospective cohort design was used. The total study population consisted of 3322 workers from a Dutch viscose textile plant who had all been employed for at least half a year between 1 January 1947 and 1 January 1980. Only production and maintenance workers were selected for the study. A group of 1434 workers who had been exposed to carbon disulfide was identified from the files available at the plant. The remaining 1888 workers who had not been exposed to carbon disulfide were used as a reference group. The total study population was followed for mortality until 1 January 1988. For the 762 workers who had died before that date, the causes of death were checked at the Central Bureau of Statistics. The results show a slightly but significantly increased risk for CVD mortality (CVD-specific SMR of 115), despite the observation of the socalled healthy worker effect and the statistical uncertainties inherent to this type of study. The results are in accordance with those reported by other investigators. The results indicate that exposure to relatively low levels of carbon disulfide increases the risk of CVD mortality.     

二硫化碳对大鼠神经组织氧化-抗氧化系统的影响

目的探讨二硫化碳亚慢性染毒对大鼠神经组织氧化-抗氧化系统的影响。方法雄性Wistar大鼠30只，随机分为对照组和低、高剂量染毒组，每组10只。利用300和500mg·k^-1·d^-1二硫化碳灌胃染毒，每周5次，连续12周，建立大鼠中毒性神经病模型，测定大鼠大脑、脊髓和坐骨神经中丙二醛（MDA）、活性氧（ROS）、谷胱甘肽（GSH）、超氧化物歧化酶（SOD）、谷胱甘肽过氧化物酶（GSHPx）、过氧化氢酶（CAT）和总抗氧化能力（T-AOC）等指标的变化。结果与对照组相比，染毒大鼠神经组织中MDA和ROS含量明显增加。其中，低、高剂量组大脑MDA含量分别增加20．7％、33．6％，脊髓MDA含量增加18．5％、23.3％，坐骨神经MDA含量增加23.1％、53．0％；低、高剂量组大脑ROS含量分别升高20．1％、34．9％，高剂量组脊髓、坐骨神经ROS含量分别升高14．1％、15．4％，差异均有统计学意义（P〈0．05或P〈0，01）。与对照组相比，染毒大鼠神经组织中GSH含量、SOD、GSH—Px、CAT活力和T—AOC明显降低，其中，低、高剂量组大脑GSH含量分别降低17．2％、26，5％，脊髓GSH含量降低26．4％、31．2％，坐骨神经GSH含量降低15．1％、20．0％；低、高剂量组大脑T—AOC分别降低11．1％、26．4％，脊髓T．AOC降低15．1％、38．4％，坐骨神经T—AOC降低35．6％、42．3％；低、高剂量组脊髓SOD活力分别降低12．1％、25．4％，坐骨神经SOD活力降低16．4％、30-3％；低、高剂量组脊髓GSH—Px活力分别降低17．3％、32．5％，坐骨神经GSH．Px活力降低17．1％、21．5％；高剂量组大脑GSH—Px、SOD活力分别降低12．6％、30．1％；低、高剂量组大脑CAT活力分别降低17．5％、39．4％，脊髓CAT活力降低25．2％、31．3％，坐骨神经CAT活力降低17．1％、36．9％，上述差异均有统计学意义（P〈0．05或P〈0．01）。结论二硫化碳损伤了大鼠神经组织的氧化-抗氧化系统，可能与二硫化碳中毒性神经病的发生机制有关。     

Epidemiological study of gastrointestinal and liver effects of carbon disulfide

Summary In the framework of an extensive health survey, 119 viscose rayon workers exposed to carbon disulfide (CS₂) and 79 workers from other plants not exposed to any toxic agent in the working environment underwent a gastrointestinal examination including a self-administered questionnaire, abdominal palpation, percussion and a number of liver function tests. In the viscose rayon factory the working conditions have not changed since 1932. Personal monitoring performed in 17 jobs showed CS₂ exposures varying from 4 to 112 mg · m^–3. For each individual a cumulative CS₂ exposure index (CS₂ index) was calculated. Univariate analysis of the questionnaire findings showed significantly higher prevalences of anorexia (37.0% vs 11.4%, P<0.0001), vomiting (12.6% vs 3.8%, P = 0.04), and recent weight loss (10.9% vs 1.3%, P = 0.009) in the exposed than in the non-exposed workers. The exposed workers had a larger total number of gastrointestinal complaints and a larger proportion reported at least one complaint at least once a month than the non-exposed ones. Abdominal tenderness was very rare in both groups. In multiple logistic regression analysis, adjusting for alcohol intake, smoking, body mass index (BMI), coffee consumption, commuting time, stress at work, shift work, educational level, family history of ulcer disease and intake of medication, significant associations with exposure were found for anorexia (P = 0.0001), nausea (P = 0.009), vomiting (P = 0.002) and flatulence (P = 0.03). Stress at work was a determinant for quite a few digestive complaints, but shift work was not significantly associated with any of them. The exposed workers had significantly lower median values for aspartate aminotransferase (AST) and alanine aminotransferase (ALT) than the non-exposed (11.0 vs 13.5 mU/ml, P = 0.0008; 12.0 vs 13.0 mU/mL, P = 0.01, respectively. The values for liver size and -glutamyltransferase (GGT) were significantly higher in the exposed than in the non-exposed workers (72 vs 67 mm, P = 0.002; 13 vs 11 U/1, P = 0.0003, respectively). The alkaline phosphatase (AP) activity did not differ significantly between the two groups. In multiple linear regression, adjusting for alcohol, pharmaceuticals consumption and BMI, there was a slightly significant negative association between exposure and AST (P = 0.04) and positive association with liver size (P = 0.002) and GGT (P = 0.0001). Alcohol was positively associated with GGT, and BMI with ALT and GGT.     

Studies on chronic carbon disulfide poisoning

Summary Direct ophthalmoscopic/color fundus photographic examinations and the Prednisolone Glucose Tolerance Test (PGTT) were performed in 214 male carbon disulfide workers, three times in 5 years. The purpose of the follow-up study was to determine the following: (1) the effects of exposure cessation on the course of retinopathy; (2) a prognosis for retinopathy in workers continuously exposed for years; (3) a reasonable maximum length of service at exposure sites, for which equal or shorter exposure duration would not cause retinopathy under present Japanese working conditions; (4) the relationship between changes in glucose tolerance and the course of retinopathy.During the five-year period of study, 56 workers were transferred from exposure to non-exposure work and 31 were not examined. Thus, the subjects completely followed-up numbered 183(85.5%) and fell into two groups: still-exposed and removed from exposure.Results can be summarized as follows: (1) Progression to a more developed stage of retinopathy occurred in 23.1% of the 134 still-exposed group members. (2) Among the 80 removed group members, the prevalence of progression was 13.7%, but no progressed case was found in workers with a short duration of past exposure (10 years or less). (3) Disappearance or improvement to a milder stage of retinopathy occurred in 1.5% of the still-exposed and in 11.3% of the removed group members. In the latter, these changes occurred much sooner after exposure cessation. Even in workers exposed for a long duration, retinopathy either disappeared or improved after cessation. (4) Mean blood-glucose values at both one and two hours (during PGTT) were higher in workers with retinopathy than in those without retinopathy. However, data regarding any relationship between changes of glucose tolerance and the course of retinopathy were not obtained during the study.Finally, similarities in the clinical pictures of chronic carbon disulfide poisoning and diabetes are discussed.     

二硫化碳对大鼠支持细胞凋亡及FasL表达的影响

目的探讨二硫化碳对离体培养支持细胞凋亡及FasL基因表达的影响。方法以0、0．36、0．72、1．44μmol/ml浓度的二硫化碳作用于离体培养的大鼠支持细胞24 h后,应用噻唑蓝(MTT)法检测支持细胞存活率,流式细胞术检测细胞凋亡及逆转录聚合酶链反应(RT-PCR)技术检测凋亡相关基因FasL的表达。结果二硫化碳处理后的支持细胞存活率随作用浓度的增加而下降,当≥1．44μmol/ml浓度时,细胞存活率(73．34%±1．39%)明显下降,与溶剂对照组(99．98%±5．48%)比较,差异有统计学意义(P＜0．05)。随二硫化碳浓度升高,细胞凋亡率增加,当浓度≥1．44μmol/ml时,支持细胞凋亡率(7．93%±0．43%)明显升高,与溶剂对照组(3．63%±0．53%)比较,差异有统计学意义(P＜0．05)。随二硫化碳浓度增加,凋亡相关基因FasL表达量亦明显增加。结论二硫化碳对离体培养支持细胞具有细胞毒性作用,可导致细胞凋亡率升高,凋亡相关基因FasL高表达。     

职业接触二硫化碳生物接触限值的探讨

目的 探讨我国职业接触二硫化碳(CS2)的生物接触限值.方法 用高效液相色谱法测定工人班末尿中2-硫代噻唑烷-4-羧酸(TTCA)含量,用气相色谱法测定接触CS2工人作业场所空气中CS2浓度,探讨二者的相关关系,比较生物接触限值和PC-TWA判定结果.结果 CS2作业工人班末尿中TTCA含量与其接触的工作场所空气中CS2浓度呈正相关,回归方程式Y=0.265X-0.165 (r=0.91,P＜0.01).基于本次研究的回归方程,根据GBZ 2.1-2007《工作场所有害因素职业接触限值第1部分:化学有害因素》规定的CS2的PC-TWA 5 mg/m3推算,CS2接触工人班末尿中TTCA浓度生物限值为1.2 mgTTCA/g Cr.结论 建议我国CS2生物接触限值修订为1.2 mg TTCA/g Cr.     

二硫化碳对作业人员心血管系统的影响

目的 探讨二硫化碳(CS2)对作业人员血管功能的影响.方法 以某厂511名在岗的CS2作业人员为研究对象,将长丝车间和短丝车间的作业人员归为高浓度暴露组,其余车间的工人归为低暴露组.用动脉脉搏分析仪(VP-1000PWV/ABI)检测作业人员的四肢血管收缩压(SBP)、舒张压(DBP)、平均动脉压(MAP)、脉压(PP)、心率(HR)、肱-踝动脉段脉搏波传导速度(brachial ankle pulse wave velocity,baPWV)、输出踝臂指数(ABI)、血清胆固醇(TC)和甘油三酯(TG)及血糖.结果 低暴露组平均体重指数(23.6 kg/m2)高于高暴露组(22.9 kg/m2),差异有统计学意义(P＜0.01);低暴露组平均PP及血清TG水平均高于高暴露组(P＜0.05),ABI低于高暴露组(P＜0.05),差异均有统计学意义;血清TG、baPWV在两组间差异无统计学意义;高血压、高血糖、高血脂、baPWV和ABI异常检出率在高暴露和低暴露两组之间差异无统计学意义.结论 在目前的劳动条件下,CS2长期暴露对作业人员心血管功能无明显影响.     

接触不同浓度二硫化碳工人神经系统体征异常检出率分析

目的 研究接触不同浓度二硫化碳(CS2)对作业工人神经系统体征异常检出率的影响.方法 收集某化纤厂2004-2011年间工作场所CS2浓度或作业工人个体接触CS2浓度的检测资料并进行处理,对该化纤厂3 464名接触CS2的作业工人分别进行肌力和肌张力、膝反射、跟腱反射、四肢感觉功能及三颤等神经系统体征检查;用x2检验的方法比较不同组间神经系统异常率的差异.结果 该化纤厂作业工人接触CS2的8h时间加权平均浓度为0.2～41.0 mg/m3,几何均数为2.38 mg/m3.其中1 771名作业工人接触CS2的浓度为0.2～2.5 mg/m3;642名作业工人接触CS2的浓度为2.6～4.8 mg/m3;1 051名作业工人接触CS2的浓度为5.1～41.0 mg/m3,大于5.0 mg/m3的职业接触限值标准.累积接触量为≤10.0、10.1 ～ 20.0、20.1 ～ 30.0、30.1 ～ 40.0、40.1 ～ 50.0、＞50.0 mg/m3·年组的膝反射异常率为3.0％(31/1 045)、3.7％(21/574)、4.8％(16/331)、3.3％(10/305)、5.9％ (11/187)、6.7％ (68/1 022),差异有统计学意义(x2=19.53,P＜0.01);跟腱反射异常率为2.2％ (23/1 045)、3.7％ (21/574)、2.7％ (9/331)、2.3％ (7/305)、2.1％ (4/187)、5.6％(57/1 022),差异有统计学意义(x2=21.27,P＜0.01);感觉功能异常率为0.4％(4/1 045)、0.5％(3/574)、0.6％(2/331)、0.0％(0/305)、2.1％ (4/187)、1.7％(17/1 022),差异有统计学意义(x2=15.89,P＜0.01).按年龄和性别分层统计结果,除≤25岁年龄段不同浓度组间跟腱反射异常率差异有统计学意义[接触浓度为≤2.5、2.6～5.0、≥5.0 mg/m3组跟腱反射异常率分别为0.4％(2/511)、1.0％(1/98)、2.1％(7/327),x2=5.59,P=0.045]外,其余各年龄段和各性别不同浓度组间神经系统各体征异常检出率差异无统计学意义(P＞0.05).结论 接触CS2除对≤25岁年龄段跟腱反射异常率有影响外,对大部分年龄段和性别组作业工人神经系统各体征无明显影响.     

二硫化碳对大鼠脊髓组织中微管和微丝表达的影响

目的初步探讨二硫化碳的神经毒性是否与微管、微丝含量变化有关及其机制。方法Wistar雄性大鼠随机分为2个二硫化碳染毒组和1个对照组,每组20只,染毒剂量分别300和500mg/kg,每周5次,连续12周,建立二硫化碳中毒性神经病模型。利用SDS-PAGE和Western Blotting方法检测大鼠脊髓组织中α-微管蛋白、β-微管蛋白和β-肌动蛋白的相对含量;并利用RT-PCR检测α-微管蛋白、β-微管蛋白和β-肌动蛋白的相应mRNA水平。结果二硫化碳染毒引起大鼠脊髓中β-微管蛋白和β-肌动蛋白含量明显改变。300和500 mg/kg二硫化碳染毒动物的脊髓上清β-微管蛋白含量较对照分别升高了141%和158%差异有统计学意义(P<0.01),β-肌动蛋白的含量分别升高了19%和32%差异有统计学意义(P<0.01)。在脊髓沉淀中,β-微管蛋白含量较对照分别增加了107%和118%差异有统计学意义(P<0.01),但β-肌动蛋白的含量无明显改变。与此同时,与对照组相比,300和500 mg/kg二硫化碳染毒动物β-微管蛋白的mRNA水平分别升高了207%和212%差异有统计学意义(P<0.01),β-肌动蛋白的mRNA水平升高了94%和91%差异有统计学意义(P<0.01)。然而,α-微管蛋白在蛋白和mRNA水平均无显著性改变。结论二硫化碳染毒引起大鼠脊髓中微管和微丝蛋白表达发生了显著改变,这种改变可能与二硫化碳的外周神经毒性有关。     

CS2作业工人接触水平的时间加权平均浓度

目的 进行二硫化碳作业工人接触水平的时间加权平均浓度的研究,探讨它们的代表性,为进一步制订卫生标准提供依据。方法 采用国际通用的方法和仪器,分别用固定点采样法测定了车间空气中的二硫化碳浓度,个体采样法测定了作业工人8h的实际暴露水平及其8h工作地点分布的调查,计算出两者各自的TWA,并进行了比较。结果 粘胶作业工人工作的流动性较大,仅有75％的工作时间停留在车间内,分别在16．3％和8．3％的工作时间分布在车间内休息室和车间外面的环境。结论 固定点采样法和工人个体采样技术所获得的TWA值分别为14．87mg/m^3和22．14mg/m^3。MAC并不能反映流动性较大的工种工人的实际接触水平。     

Antioxidative stress response in workers exposed to carbon disulfide

Objective: To study the effects of carbon disulfide (CS₂) on antioxidative stress systems of exposed workers. Methods: Enzyme-linked immunosorbent assay (ELISA) and thiobarbituric acid test (BAT) were conducted on 67 exposed workers and 88 controlled ones in a viscose rayon factory to determine their serum cuprozinc-superoxide dismutase (CuZnSOD) and malonyldialdehyde (MDA) levels. Results: The average levels of CuZnSOD in workers exposed to CS₂ both above and below 10 mg/m³ were higher than those in the control group (P < 0.0001), showing some dose-effect and dose-response relationships. SOD levels increased when the exposure index (EI) was less than 300, and remained at a high level at the range of 300 to 900. When EI was higher than 900, SOD tended to decrease. Meanwhile, the serum MDA levels increased. Both CS₂ concentrations and exposure time contribute to the MDA levels. Conclusions: CS₂ exposure could influence the stress response of the oxidative-antioxidative system of workers. Increased SOD levels could be considered as the stress response of antioxidative system to CS₂ exposure in the early stages, and the influence of CS₂ on SOD might be bi-directional. SOD and MDA might become objective indices in workers' health surveillance. The role of these two indices in the intoxication mechanism still needs to be clarified. Received: 3 August 1999 / Accepted: 25 April 2000     

An epidemiological study on retinopathy due to carbon disulfide

Summary In order to clarify the influence of carbon disulfide exposure level on the progress of retinopathy, direct ophthalmoscopy and color fundus photography were performed on 338 randomly-selected workers of a viscose rayon staple plant.Retinal abnormalities characterized by microaneurysms were found in 89 of 289 workers exposed to carbon disulfide (30.8%) and in 2 of 49 control workers not exposed to carbon disulfide (4.1%). The prevalence of retinopathy among 124 high exposure group members was significantly higher than that among 127 low exposure group members. Results clearly showed that the prevalence of retinopathy increased with both increasing carbon disulfide exposure duration and increasing concentration.Finally, the onset and progress of retinal changes due to carbon disulfide are compared to those occuring with diabetes mellitus.     

单细胞凝胶电泳法检测二硫化碳染毒小鼠精子DNA损伤

目的　用碱性单细胞凝胶电泳技术检测CS2 染毒小鼠精子DNA损伤 ,研究CS2 的遗传毒性。方法　用单细胞凝胶电泳法 ,以DNA断裂分级及DNA彗星尾长和尾矩来评价CS2 对精子DNA的损伤。结果　CS2 染毒剂量组均出现DNA彗星的拖尾率增加 (分别为 6 7.14 %、84 .2 9%和 91.0 0 % )、损伤强度指数增高 (分别为 5 0 7、6 5 6和 74 5 )、DNA头部百分比减少 (分别为 84 .5 5 %、73.84 %和5 5 .71% )、彗星尾长 (分别为 5 .87、8.81、13.4 9μm)及尾矩 (分别为 1.30、1.6 3、2 .6 6 μm)增加 ,与阴性对照组比较 ,差异均有显著性 (P <0 .0 5 )。结论　单细胞凝胶电泳能够快速、敏感地检测CS2 染毒小鼠精子DNA损伤 ,该方法可用于环境致癌物和致突变物的检测。     

二硫化碳及其与噪声联合作用对大鼠心肌组织的损害

目的　研究二硫化碳(CS     

CS2作业工人红细胞膜收缩蛋白初探

目的　观察作业工人长期接触二硫化碳 (CS2 )对其红细胞膜收缩蛋白的影响。方法　气相色谱法测定作业场所CS2 浓度 ;分离 16名工人红细胞膜 (接触、对照各 8人 ) ,采用十二烷基硫酸钠 -聚丙烯酰胺凝胶电泳 (SDS PAGE)法分析红细胞膜蛋白谱。结果　车间空气CS2 浓度 (TWA)为 0～ 8.98mg/m3。CS2 接触工人红细胞膜收缩蛋白百分含量 (34.48% )高于对照工人 (2 6 .18% ) (t =5 .92 0 ,P <0 .0 0 1) ,CS2 浓度 (TWA)与收缩蛋白含量呈正相关 (r=0 .85 9,R2 =0 .738,P <0 .0 0 1) ,接触指数 (EI)与收缩蛋白含量也呈正相关 (r=0 .713,R2 =0 .5 0 8,P =0 .0 0 2 )。其中 2名长工龄高浓度CS2接触工人红细胞膜图谱在高相对分子质量区有可疑异常区带形成。结论　长期接触CS2 作业工人红细胞膜蛋白电泳图谱出现异常 ,提示该指标有希望成为CS2 接触工人的分子水平接触 -效应生物标志物。     

二硫化碳对邻苯三酚自氧化化学发光体系及超氧阴离子的影响

目的 探讨二硫化碳（ＣＳ２）对邻苯三酚－鲁米诺（ＰＡ－Ｌ）自氧化化学发光体系以及对超氧阴离子产生的影响。方法 应用ＰＡ－Ｌ化学发光体系观察ＣＳ２的发光动力学曲线及超氧化物歧化酶（ＳＯＤ）对发光强度的抑制作用。结果 不同浓度ＣＳ２（１０、４０、８０ｍｇ／ｍｌ）与乙醇溶剂对照组比较,均能使ＰＡ－Ｌ体系化学发光强度增强,峰时延迟,呈明显的剂量－效应关系,其中ＣＳ２浓度为８０ｍｇ／ｍｌ时化学发光峰值高于无