Intoxication Induced by Urea Containing Diets in Broiler Chickens: Effect on Weight Gain, Feed Conversion Ratio, Hematological and Biochemical Profiles

Urea as a source of cheap non-protein nitrogen is used to adulterate fish and meat meals which are basic components of broiler diets. The present study was carried out to elucidate the effects of urea on weight gain, and hematological and biochemical profiles. A total of 48 broiler chicks were randomly allotted into 4 groups, designated Groups 1, 2, 3 and 4 of 12 birds each. Birds in Groups 2, 3 and 4 were fed on diets containing urea at the levels of 1%, 2.5% and 4%, respectively. Birds in Group 1 served as control and were not exposed to urea. Experimentation period was for 3 weeks and experiment was terminated when birds were 42 days of age. Body weight of all intoxicated birds at the various intervals was significantly decreased in comparison with that of the untreated control. Compared with control, all intoxicated broilers manifested significant (P ≤ 0.05) decrease in all hematological parameters involving erythrocytic and total leucocytic counts, Hemoglobin (Hb) and Packed Cell Volume (PCV) on a dose- and time-pattern. In comparison with the control levels, biochemical profile of the intoxicated birds disclosed significant decrease in blood glucose level and significant increase in serum uric acid, urea, Alkaline Phosphatase (ALP) and Lactate Dehydrogenase (LDH) levels. Based upon the present data, it was concluded that the addition of urea to broiler diets bears serious sequences concerning the general health condition, performance, weight gain, and hematological and biochemical profiles.

Influences of stoichiometric ratio B/A on structures and electrochemical behaviors of La_(0.75)Mg_(0.25)Ni_(3.5)M_x (M=Ni,Co;x=0-0.6) hydrogen storage alloys

In order to investigate the influences of the stoichiometric ratio of B/A (A: gross A-site elements, B: gross B-site elements) and the substitution of Co for Ni on the structures and electrochemical performances of the AB3.5-4.1-type electrode alloys, the La-Mg-Ni-Co system La0.75Mg0.25Ni3.5Mx (M=Ni, Co; x= 0, 0.2, 0.4, 0.6) alloys were prepared by induction melting in a helium atmosphere. The structures and electrochemical performances of the alloys were systemically measured. The results show that the structures and electrochemical performances of the alloys are closely relevant to the B/A ratio. All the alloys exhibit a multiphase structure, including two major phases, (La, Mg)2Ni7 and LaNi5, and a residual phase LaNi2, and with rising ratio B/A, the (La,Mg)2Ni7 phase decreases and the LaNi5 phase increases significantly. When ratio B/A=3.7, the alloys obtain the maximum discharge capacities. The high rate discharge(HRD) capability of the alloy (M=Ni) monotonously rises with growing B/A ratio, but that of the alloy (M=Co) first mounts up then declines. The cycle stability of the alloy (M=Co) monotonously increases with rising B/A ratio, but it first decreases slightly then increases for the alloy (M=Ni). The discharge potential of the alloy (M=Ni) declines with increasing B/A ratio (x>0.2), but for the alloy (M=Co), the result is contrary. The substitution of Co for Ni significantly ameliorates the electrochemical performances. For a fixed ratio B/A=3.7, the Co substitution enhances the discharge capacity from 365.7 to 401.8 mA·h/g, the capacity retention ratio (S100) after 100 charging-discharging cycles from 50.32% to 53.26% and the HRD from 88.65% to 90.69%.

EFFECTS OF STOICHIOMETRIC RATIO ON STRUCTURE AND ELECTRODE PERFORMANCE OF HYDROGEN STORAGE ALLOYS

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Effects of Feeding Time on the Growth Performance and Variation of RNA/DNA Ratio of the Chinese Soft-shelled Turtle, Pelodiscus sinensis

The present study was to investigate the effects of feeding time on growth of the Chinese soft-shelled turtle. The experiment was carried out with a photoperiod of 12L （light）： 12D （dark） with lights on at 06：00 and off at 18：00. Turtles were maintained at a temperature of 32 - 0.2 ℃ in tanks throughout the length of the experiment. The turtles in group 1 to group 6 were fed respectively at 00：00, 04：00, 08：00, 12：00, 16：00 and 20：00 with 60 turtles each （Initial body weight 88.27 - 0.09 g）. Acrophases of postprandial RNA/DNA ratio in liver in each group was shown between 5h and 7h after feeding. A positive linear correlation could be seen between specific growth rate （SGR） and RNA/ DNA：SGR=t.1586RNA/DNA-0.7097 （r = 0.9328, P = 0.0066）. The results indicated that the values at the acrophases of about 6h after feeding might be used as an instantaneous growth index in the Chinese soft-shelled turtle. The turtles in group 1 grew better than group 3, group 4, group 5, group 6, because they ate more, but they ate more and grew slower than group 2, whose feed conversion rate was also higher. Meanwhile, the SGR and feeding rate of turtles fed at 12：00 were the lowest from the six groups （P 〈 0.05）. Turtles fed in group 1, group 2 and group 6 developed more heavy final body weight （FBW）, higher feeding rate and SGR than the other three groups. This probably suggested that turtles fed in scotophase grew better than that fed at photophase in total.

Effects of ratio of hydrogen flow on microstructure of hydrogenated microcrystalline silicon films deposited by magnetron sputtering at 100 ℃

Hydrogenated microcrystalline silicon(μc-Si:H)films were prepared on glass and silicon substrates by radio frequency magnetron sputtering at 100°C using a mixture of argon(Ar)and hydrogen(H2)gasses as precursor gas.The effects of the ratio of hydrogen flow(H2/(Ar+H2)%)on the microstructure were evaluated.Results show that the microstructure,bonding structure,and surface morphology of theμc-Si:H films can be tailored based on the ratio of hydrogen flow.An amorphous to crystalline phase transition occurred when the ratio of hydrogen flow increased up to 50%.The crystallinity increased and tended to stabilize with the increase in ratio of hydrogen flow from 40%to 70%.The surface roughness of thin films increased,and total hydrogen content decreased as the ratio of hydrogen flow increased.Allμc-Si:H films have a preferred(111)orientation,independent of the ratio of hydrogen flow.And theμc-Si:H films had a dense structure,which shows their excellent resistance to post-oxidation.

The Effect of Quantitative Feed Restriction Duration on Growth Performance and Carcass Characteristics of Broiler Chickens

The growth productivity of broilers is influenced by improving growth performance through improving body weight, average daily gain, and feed conversion rate. The objective of the study was to determine the effect of quantitative feed restriction duration on growth performance and carcass characteristics of broilers. A total of 144 day-old broiler chicks were reared in a deep litter system until slaughter at 42 days. Chicks were randomly allocated to three treatments which were replicated three times with 16 birds per replicate. The three treatments were the control (T1), one week of feed restriction (T2), and two weeks of feed restriction (T3). Birds were fed with starter, grower and finisher diets. The average daily gain (ADG), average daily feed intake (ADFI), and the feed conversion ratio (FCR) were computed for each week. Carcass weight and internal organs weights were measured. The body weight gained by the birds in T1 was similar to the birds that were restricted for a week. The treatments had a significant effect on the average daily gain in weeks 4, 5, and 6. The ADG for T2 was higher (P < 0.05) at week 5 after 1 week of restriction, than T1 and T3. The feed conversion ratio was significantly higher in T3 after 2 weeks of restriction. In T2 and T3, feed intake was significantly lower than in birds fed ad libitum at week 4 at the start of the treatment. There was no significant effect on the relative weights of heart weights, liver, gizzard, feet, and heads among the treatment groups except for intestine weight which was lower (P < 0.05) in T1 than T2 and T3. It was concluded that broilers that were restricted for one week had a positive result in growth performance. Feed restriction had minimal effect on the organ weights of broiler chickens.

Oxygen and hydrogen isotope ratios of chert from the Sixtymile Formation in Grand Canyon National Park,USA：a warm palaeoclimate,freshwater deposit

New oxygen and hydrogen isotope ratios of chert from middle, intraformational breccias, and upper breccia members of the Sixtymile Formation（SMF） in eastern Grand Canyon National Park（AZ） yield palaeoclimate estimates between 27 and 33℃. The isotopic compositions of cherts define a domain approximately parallel to the meteoric water line when plotted on a δD–δ-（18）O diagram; these data indicate that meteoric water was involved during formation of the chert. In thin section, the absence of interlocking mega quartz（〉35 lm） and silicafilled fractures and veins, along with preserved micromorphological silica fabrics, suggest that the chert has not been permeated by later hydrothermal fluids. Petrographic observations in thin section such as cyclic silica precipitation phases and glaebular micromorphologic fabrics lend support to the interpretation that meteoric waters were involved during chert precipitation. The post 742 Ma SMF has been correlated with diamictite（transition） beds of the Kingston Peak Formation（CA）, which in turn have been interpreted to have been deposited during the Sturtian Ice Age（-750–700 Ma）. Absence of facetted and striated clasts and other diagnostic glaciogenic features in the SMF,an unconformable contact with the stratigraphically older Chuar Group, coupled with warm palaeotemperature data inferred from stable isotope values of chert, tentatively suggest that deposition of sediment in the SMF likely did not take place during the Sturtian Ice Age.

Biohydrogen Production from Synthetic Waste Co-digested with Liquid Dairy Cow Manure： Effect of Temperature and Mixing Ratio

Biohydrogen production from synthetic waste, SW （model organic fraction of municipal solid waste） co-digested with liquid dairy manure （M） was tested in batch reactions to assess the effect of temperature and mixing ratio of the substrates. A 5 × 2 factorial design experiment was conducted. Synthetic waste： manure mixtures of 1：1, 2：1, 3：1, 1：0, 0：1 （volatile solids, VS, basis） were tested at 37 （T37） and 55 ℃ （T55） using thirty 1 L laboratory scale digesters. Total VS of each mixture was 50 g/L except SW：M 0：I treatment, where total VS was 27.4 g/L. Gas samples were taken daily to determine hydrogen production, and slurry samples taken before and after experimentation, were analyzed for volatile fatty acid （VFA） concentration, volatile solid （VS） degradation, ammonium nitrogen （NH4＋-N） and pH. Hydrogen production （mL/g-VS fed） showed a significant two-factor interaction between incubation temperature and SW：M ratio （P 〈 0.001）. Maximum production of 15.8 mL/g-VS （fed） was achieved in SW：M ratio of 3：1 at 55 ℃. Generally, hydrogen productions at thermophilic temperature （T55） were significantly higher than at mesophilic （T37） temperature for all treatments （P 〈 0.001） except for SW：M 1：0 and SW：M 0：1 treatments （P 〉 0.05）. This study indicates that hydrogen production from co-digestion of synthetic waste and manure is dependent on incubation temperature and relative contribution of wastes in the mixture.

天然气管道掺氢输送研究现状与分析

天然气管道掺氢输送是实现大规模、远距离和低成本氢气运输的手段之一,但氢气掺入天然气管道给管线运行工况、安全维护等带来了不容忽视的影响,具有一定的安全隐患。为此,围绕国内外天然气管道掺氢输送的技术研究与工程应用现状,讨论了影响天然气管道掺氢安全输送的主要因素,即掺氢引起的天然气物性改变、氢致失效和掺混不均,以及掺氢管道泄漏扩散和燃爆的安全问题。结果表明,天然气掺氢后,对现有管材提出了新要求,需开展相关实验以揭示氢致失效机理,掺氢天然气管道停输后是否发生气体分层与管道是否发生氢致失效密切相关。掺氢天然气管道泄漏扩散及自燃的安全范围、发生燃爆所需的最小掺氢比及燃爆机理尚不明晰,实验研究与实际运营存在差距。针对天然气管道掺氢输送的规范、标准及相关监管政策仍处于发展阶段,需要结合系统的研究数据及实践进一步完善。以上结果明晰了掺氢输送存在的风险,可为大规模掺氢混输的工程推广与实际运营提供参考。

进水分配比对分段进水PN/A工艺脱氮性能影响

以预脱碳污水和市政污水作为目标污水,建立了好氧段分段进水的新模式,通过调整进水分配比来优化好氧段C/N,以期实现短程硝化-厌氧氨氧化(PN/A)工艺在实际工况下的稳定运行.采用4组以好氧/缺氧/好氧/缺氧(O/A/O/A)模式运行的序批式反应器(SBR),R1、R2、R3及R4以进水分配比(预脱碳污水:市政污水)分别为1:0、2:1、1:1及1:2的分段进水模式运行.结果表明,R1未能实现PN/A工艺,总氮去除率(NRE)仅为60.2%.随着进水分配比不断下降,R2、R3、R4分别在第34,30及36d实现PN/A工艺,NRE分别达到71.8%、80.3%及74.1%.其中R3系统处理性能最好且最稳定,厌氧氨氧化贡献率达到83.9%.污泥沉降性与粒径最佳.此外,高通量结果显示氨氧化菌(Nitrosomonas)和厌氧氨氧化菌(Candidatus_Kuenenia)丰度分别为2.74%和12.17%,且与好氧异养菌(AHB)形成了良好的协同作用.因此,分段进水模式在进水分配比为1:1时有利于实现稳定的PN/A工艺,此时各功能微生物可得到较好富集与平衡.

柴油/醇氢双燃料发动机燃烧特性试验研究

在不改变Z6170发动机结构和参数的基础上,搭建一套基于尾气余热在线重整制氢的甲醇和重整气进气歧管喷射系统,并开展了柴油/醇氢双燃料发动机的燃烧特性研究。试验结果表明,柴油/甲醇双燃料模式下,随着替代率增加,燃烧持续期(CA10-90)逐渐减少,着火延迟期逐渐增长,燃烧重心(CA50)表现出先提前后滞后的特性。柴油/醇氢双燃料模式下,在同替代率时相比于甲醇模式,着火延迟期缩短,燃烧持续期反而延长。研究结果为柴油/醇氢双燃料发动机的性能进一步优化提供了试验支持。

海南石碌铁矿石氢基矿相转化——磁选试验研究

海南石碌铁矿石铁品位为52.45%,铁主要以赤(褐)铁矿形式存在,分布率达86.18%,少量以磁铁矿形式存在。为高效回收利用该矿石,采用氢基矿相转化(HMPT)—磁选工艺流程开展了系统的试验研究,并对适宜条件下的产品进行了化学成分、XRD和VSM分析。结果表明:试样在给矿粒度-0.074mm占89.41%、HMPT温度525℃、HMPT时间10min、总气体流量500m L/min、H_(2)浓度20%、HMPT产品磨矿细度-0.045mm占69.68%的适宜条件下,经磁选获得铁品位65.26%、铁回收率95.39%的铁精矿。试验所获铁精矿较原重磁联合工艺铁精矿品位提高了2.7个百分点,铁回收率增加了30个百分点。研究不仅为海南石碌铁矿氢基矿相转化—高效分选工业应用提供技术支撑,还为其他复杂难选铁矿资源的绿色高效分选提供了参考依据。

燃料配比和点火提前角对氨氢发动机的性能影响研究

针对氨氢发动机在燃料匹配比和点火提前角参数不准确时会造成发动机输出效率较低、排放增加等问题,以某款直列六缸四冲程氨氢发动机为研究对象,给出不同研究参数,在GT-POWER中建立发动机仿真模型,并使用Simulink联合仿真验证了氨氢发动机仿真模型的可行性。研究燃料配比和点火提前角对发动机的性能影响规律,结果表明:发动机在9∶1的氨氢比下有最佳的综合使用效率;26°CA点火提前角时可以提高发动机效率,降低排气温度,但不利于减少污染物排放;14°CA点火提前角时可降低污染物排放,但会影响发动机工作效率;20°CA为最佳点火提前角。研究结果可为针对氨氢发动机的标定及进一步的性能规律研究提供参考。

氮氢比对H13钢离子渗氮组织和耐磨性能的影响

针对H13钢离子渗氮精密热锻模具出现早期疲劳裂纹或龟裂问题,开展温度520℃、气压250 Pa、不同氮氢比条件下的离子渗氮试验,以考察渗氮气氛中氮氢比对渗层组织及耐磨性能的影响规律。利用X射线衍射仪、共聚焦显微镜、扫描电镜、显微硬度计和摩擦磨损试验机分析不同氮氢比渗氮后渗层的相结构、显微组织、显微硬度及耐磨性能。结果表明:渗氮时间3 h、氮氢比为1∶3、1∶4、1∶5时,渗层物相主要由ε-Fe_(2-3)N、γ′-Fe_(4)N、α_(N)-Fe(N)相组成,氮氢比为1∶8时渗层物相主要为γ′和αN相;渗层深度及硬度随渗氮气氛中氮浓度降低而减小,氮氢比为1∶8时,延长渗氮时间可增加渗层厚度,在60μm渗层深度内硬度可达800~900 HV_(0.1)。氮氢比为1∶3、1∶4的渗层的磨损机理以疲劳磨损为主;氮氢比为1∶5、1∶8的渗层的磨损机理以磨粒磨损为主。采用氮氢比为1∶8对H13钢进行离子渗氮,渗层中无化合物层和脉状组织,渗层可获得适中的硬度和较佳的韧性,具有较好的耐磨性能。

沸腾床渣油加氢裂化装置投产对重油制氢装置的影响

沸腾床渣油加氢裂化装置投产后,将溶剂脱沥青装置的原料由常减压装置洗涤油和减压渣油调整为渣油加氢裂化装置未转化油,作为重油制氢装置原料的脱油沥青性质由此发生变化。对比重油制氢装置原料油性质、主要操作参数、技术经济指标、气化炉运行周期等参数,结果表明,渣油加氢裂化装置投产后,以脱油沥青为原料的重油制氢装置气化炉油气分布更均匀,气化单元有效气含量提高2.12个百分点,有效气产率提高0.20个百分点,碳转化率提高0.18个百分点,氢气产率提高1.21个百分点,吨氢标油能耗下降140 kg,装置各项技术经济指标均有较大幅度提升,气化炉烧嘴运行周期明显延长。

静置工况条件下掺氢天然气浓度分布规律

利用天然气管道进行掺氢输送已成为氢能及天然气输送领域的热点和重点,但当前业界对于掺氢天然气在管道输送和停输静置过程中是否会自发分层一直存在较大争议。为了厘清该问题,以掺氢天然气在管道中静置这一极端工况为例,基于热力学能量最小原理,推导了在重力场作用下掺氢天然气浓度分布数学模型,并采用Peng-Robinson真实气体状态方程对该数学模型进行了求解,最后研究了甲烷—氢气二元组分混合气体在4种典型场景高度和5种掺氢比下氢浓度随高度的分布规律。研究结果表明:(1)在重力影响下管道顶部和底部的氢浓度存在差异,但其受高度差的影响显著,对于米级的水平管道、几十米级的一般城镇楼宇天然气立管、百米级的高层楼宇天然气立管,氢浓度随高度变化的差异微小,可完全忽略氢分层;(2)对于千米级大落差的掺氢天然气管道,当掺氢比不超过20%时,氢分层仍可忽略,但当掺氢比很高时(例如50%)管道顶部和底部的氢浓度差将超过1%,此时需考虑工程实际情况评估能否忽略氢分层;(3)西气东输某管道考虑真实气体组成、掺氢比20%、管道落差200 m时,各气体组分的浓度随落差高度的分布规律揭示了在实际工程中此类落差高度的掺氢天然气氢分层可忽略。结论认为,对于掺混均匀的掺氢天然气在静置这种最容易发生分层的极端工况下,如果不存在千米级极端大落差和极端大掺氢比,掺氢天然气管道分层现象可完全忽略;该认识从理论上厘清了目前关于掺氢天然气分层现象的争议,对掺氢天然气管道安全输送具有重要指导意义。

零鱼粉饲料与高鱼粉饲料饲喂下凡纳对虾饲料利用效率相关性状的遗传评估

为探讨选育零鱼粉需求凡纳对虾(Penaeus vannamei)品种的可能性,解决目前鱼粉短缺、饲料成本居高不下的问题,本研究在零鱼粉饲料(蛋白含量占38%)和高鱼粉饲料(鱼粉含量占25%,蛋白含量占42%)饲喂条件下进行凡纳对虾饲料利用效率相关性状的遗传评估。选择30个家系进行40 d的单尾饲养实验,结果显示,饲喂高鱼粉饲料对虾的平均增重率(62.00%)和平均饲料效率比(124.00%)明显高于饲喂零鱼粉饲料(23.50%和49.40%)。对虾摄食量和增重率在零鱼粉饲料和高鱼粉饲料饲喂下的遗传力在0.458±0.140到0.699±0.155之间,饲料效率比在零鱼粉饲料和高鱼粉饲料饲喂下的遗传力分别为0.186±0.098和0.341±0.110。由于没有剖分出共同环境效应,遗传力都存在一定程度高估,因此,零鱼粉饲料饲喂下的饲料效率比的遗传变异并不高。摄食量和增重率在2种饲料间的遗传相关分别为0.580±0.171和0.676±0.155,表示这2个性状存在中等的基因型与饲料互作效应。饲料效率比在2种饲料间的遗传相关仅为0.299±0.304,表示该性状存在严重的基因型与饲料互作效应。综上结果来看,使用零鱼粉饲料不利于凡纳对虾的养殖及选育工作的开展。

基于工程应用的CW-GMAW熔滴过渡形态表征

综述了涉及工程应用的冷丝熔化极气体保护焊(Cold wire gas metal arc welding,CW-GMAW)熔滴过渡形态特征。结果表明,在大电流、强规范、富氩混合气体保护下,CW-GMAW工艺的熔滴过渡形态呈喷射过渡;当电流较小、电弧电压较低时,可能为滴状过渡,甚至在弧压很低时,呈现短路过渡形态。该工艺电弧发生偏向冷丝的位移,弧长变短甚至发生短路,与冷丝送进速率比增高及冷丝在电弧中产生大量金属蒸气时弧柱电阻下降有关。在具有富氩混合保护气体的相同工艺参数下,CWGMAW转变电流比GMAW降低了4%~7%。焊接工艺参数对CW-GMAW和GMAW工艺熔滴过渡形态的影响规律大致相近,但前者因涉及冷丝送进速率比和电极焊丝送进速度,以及它们的匹配等,使焊接电流的影响更为复杂。

掺氢天然气的管道输运特性仿真与分析

掺氢天然气(HCNG)输送是利用现有天然气管线实现氢气长距离运输的一种可行方案,天然气中因氢气的加入使得输运气体的物性发生明显变化,从而对管道的输运特性造成一定影响。本文对掺氢混合气的流动及换热过程进行了分析建模,对天然气掺氢管道的运行特性进行了计算分析,并在计算中使用物性快速计算公式代替BWRS方程进行物性求解以提高计算效率。根据计算结果,氢气与天然气混合气体的黏度、密度、体积热值和焦耳-汤姆逊效应系数随着掺氢比例的增加而下降,比热容和压缩因子随掺氢比例的增加而增加;在管道运行中,管输体积流量随掺氢比例的增加而上升,管道压降和管道管存随之下降,管道的能量流量先下降后在大掺氢比后略有回升;管道能量流量恒定时,管道出口压力先降低后略有升高;氢气的加入会削弱长输管线压降导致的温度降低;地面温度对于管输流量和能量流量影响较小。

饲料酵母水溶物具有促进草鱼原代肝细胞生长及修复过氧化氢损伤的作用

研究以3种酵母水溶物为实验材料,探究饲料酵母对草鱼原代肝细胞生长的促进作用和过氧化氢(H_(2)O_(2))诱导草鱼原代肝细胞氧化损伤的缓解作用。实验使用酶消化法分离得到草鱼原代肝细胞,以200μmol/L H_(2)O_(2)处理细胞1 h建立氧化应激模型;分别选取质量浓度为25、50、100、200、400 mg/L的饲料酵母水溶物处理细胞,比较3种饲料酵母水溶物对原代肝细胞的促生长效果;分别使用3种饲料酵母的最佳促生长质量浓度处理模型细胞,分析饲料酵母水溶物对H_(2)O_(2)诱导的氧化损伤的缓解作用。结果表明:3种饲料酵母水溶物均能促进原代肝细胞增殖,酵母培养物YC-A、YC-B、酵母细胞壁多糖YCP的最佳促生长质量浓度分别为100、200、100 mg/L,在该质量浓度下细胞活力较对照组极显著提高(P<0.001)。相比于H_(2)O_(2)模型组,3个饲料酵母水溶物组细胞活力和MMP极显著提高(P<0.001),培养液中LDH活性极显著降低(P<0.001),细胞凋亡率和胞内ROS水平极显著降低(P<0.01);电镜结果显示,模型组细胞线粒体肿胀、嵴扭曲或消失,细胞内出现大量空泡,而3个饲料酵母水溶物处理组观察到线粒体肿胀情况得以改善。转录组结果提示,YCP可能通过增加细胞内Ⅰ相和Ⅱ相代谢酶保护细胞免受氧化损伤,而YC对细胞的保护可能是通过调控细胞内铁稳态实现的。饲料酵母水溶物能够促进草鱼原代肝细胞生长,并对原代肝细胞H_(2)O_(2)氧化损伤具有一定的修复作用。