Response of antioxidase in viscera tissue of Pagrosomus major larvae to water-soluble fraction in No. 0 diesel oil

在实验生态条件下 ,研究了不同浓度 0 #柴油的水溶性成分 (watersolublefraction ,WSF)对真鲷幼体内脏组织抗氧化酶活性变化的影响 .结果表明 :不同浓度的WSF污染对抗氧化酶活性变化的影响表现为抛物线型剂量 效应作用形式 ;同一剂量组随着污染时间的延长 ,过氧化物歧化酶 (SOD)活力上升 ,硒谷胱甘肽过氧化物酶 (Se GPx)和过氧化氢酶 (Ca)的活力下降 ;受污染幼体在污染解除之后 ,其抗氧化酶活性得到不同程度的恢复 .Response of antioxidase (superoxide dismutase, SOD; catalase, Ca; sedium\|dependent glutathione peroxidase, Se\|Gpx) in viscera tissues of Pagrosomus Major larvae to water\|soluble fraction in No. 0 diesel oil were tested. Pagrosomus Majoe larvae were exposed to the solutions with the conc. at 0.017, 1.22, 8.82?mg(No.0 diesel oil)/L for 15 days. The results showed that the activity of antioxidase was statistically significant dose\|related effect in different WSF concentrations. Under same dosed\|concentration exposure, significant increases in SOD activity and decreases of Ca and Se\|Gpx activity were observed with the prolonged exposure time. The activity of antioxidase returned to corresponding control level after the recovery experiment.国家自然科学基金!资助项目 (项目批准号 :2 96 770 14) ;; 福建省自然科学基金!资助项目 (C9810 0 3

鲨鱼降钙素的分离纯化及性质研究

国家自然科学基金资助项目!29677014号;; 高等学校博士点专项科研基金项

EFFECTSof WATER SOLUBLE FRACTION of NO.0 DIESEL OIL ON CONTENT of REDUCED GLUATHINE IN VISCERAL TISSUES of PAGROSOMUS MAJOR LARVAE

在实验生态条件下，研究了不同浓度0号柴油的水溶性成分对真鲷幼体内脏组织还原型谷胱甘肽（gSH）含量的影响。结果表明：随着污染时间的延长，水溶性成分对真鲷幼体内脏组织gSH的含量先是诱导然后是抑制（P≤0.05或P≤0.01），而且，不同浓度水溶性成分对gSH的诱导量与污染剂量负相关，而抑制量则与污染剂量正相关。受污幼体在污染解除后，gSH的含量恢复至对照组水平，再次证明gSH对污染改变的适应性和反应能力。The effect or water soluble fraction (WSF) of No.0 diesel oil on the content of reduced glutatnione (GSH) in visceral tissues of Pagrosomus major larvae was studied in laboortorial experiment.The obtained results showed that the contents of GSH were significantly affected by the prolonged exposure of WSF, first induced then inhibited.Additional, the induction of GSH exhibited in a negative dose-related manner, though the inhibition exhibited in a positive one.The recovery of GSH after the removal of WSF further indicated the adaptability and responsibility of ASH to WSF exposure.国家自然科学基金!2967701

Effect of dissolved phosphorus on alkaline phosphatase activity in marine microalgae

在实验室批量培养条件下，测定了海洋微藻培养体系中碱性磷酸酶活力（APA）和各形态溶解磷的动态变化，分析了二者之间的关系.结果表明，在批量培养过程中，APA的动态变化呈“S“形曲线，各形态溶解磷在其变化过程中所起的调控作用不同，介质中溶解无机磷和小分子溶解有机磷的浓度是激发APA发生变化的主要调控因子，大分子溶解有机磷的浓度对APA的作用不明显，但APA的增大可加速微藻利用大分子溶解有机磷的速率.微藻的种类和丰度不影响APA的动态变化形式及其调控机理.It was thought that phosphorus licited the primary productivity in lake while nitrogen in ocean, but recent studies showed that phosphorus limited the phytoplankton growth in the specific coastal waters, results also indicated that Phytoplankton could utilize dissolved organic phosphorus (DOP) and alkaline phosphatase (AP) played an important role in the utilization of DOP.However, the variation and controlling mechanism of AP are still poorly understood.The present study focused on the effects of different species of dissolved phosphorus on the variation of AP in algal batch culture.The results showed that vacation of airline phosphatase activity (APA) was closed to "S" curve, different spotes of dissolved phosphorus had different effects on APA.The concentrations of dissolved inorganic phosphorus and small moleculal dissolved organic phosphorus had a sighficant effect on APA, while the concentration of large molecular dissolved organic phosphorus (LDOP) has little effect on APA, but the increasing of APA could accelerate the decomposing of LDOP in the medium.Results also showed that algae species and abundance had little effect on APA.国家自然科学基金!4920606

Effect of Petroleum Pollutant on SOD and Cat Enzyme in Viscera Tissue of Pagrosomus Major

研究了在实验生态条件下，不同浓度可溶性0＃柴油的暴露对真鲷幼鱼内脏组织超氧化物歧化酶（SOd）和过氧化氢酶（CAT）活性的影响.实验结果表明：SOd酶活性对于油污染胁迫呈现出明显的剂量-诱导效应关系.在同一剂量溶度作用下，延长暴油时间，能诱导鱼体内SOd酶活性，抑制CAT酶活性.当污染胁迫解除后，其幼体内脏组织中的SOd酶和CAT酶活力均得到不同程度的恢复The response of Superoxide Dismutase(SOD)and Catalase(Cat)in viscera tissues of Pagrosomus Major larvae to water soluble hydrocarbons in No.0 diesel oil was tested. Pagrosomus Major larvae were exposed to the solutions with the concentrations at 0.017, 1.22, 8.82 mg (No.0 diesel oil) /L for up to 15 days.Supernatants of viscera tissues were assayed for biochemical responses with oxidative stress SOD and Cat activities.The results showed statistically significant dose related increases in SOD activity on 9days.Compared to measurements on same dosed concentration exposure, significant increases of SOD activity in contrast to decreases of Cat activity were observed by prolonging time of expose.When releasing larvae from the highest dosed group to clear sea water levels for several days.The enzymes activities all returned towards corresponding control levels.国家自然科学基

Effects of pupils’ internalizing problems on academic performance: analysis of chain-mediated effect

目的 探讨学业效能感和家庭作业努力在小学生内化问题与学业成绩之间的链式中介作用。方法 采用广泛性焦虑自评量表、流调中心抑郁量表（简版）、学业效能感量表、家庭作业努力问卷对750名三到五年级的小学生进行问卷调查。结果 小学生内化问题与学业效能感、家庭作业努力、学业成绩均呈显著负相关；学业效能感、家庭作业努力和学业成绩均呈显著正相关。学业效能感和家庭作业努力是内化问题与学业成绩之间的中介变量。内化问题通过学业效能感来影响家庭作业努力，进而影响学业成绩，即学业效能感和家庭作业努力起链式中介作用。结论 学业效能感和家庭作业努力在小学生内化问题与学业成绩之间起链式中介作用。</p

Effects of pupils’ reading ability on academic emotions: mediating role of academic self-efficacy

目的 探讨小学生阅读能力、学业效能感与学业情绪的关系。方法 采用小学语文阅读能力测评量表、小学生学业情绪问卷和学业效能感量表，对343名三至五年级的小学生进行了历时3个月的追踪研究。结果 小学生阅读能力可以显著预测学业情绪的积极高唤醒和消极低唤醒维度；学业效能感在阅读能力与学业情绪消极低唤醒之间起部分中介作用，在阅读能力与积极高唤醒之间起跨时间点的中介作用。结论 小学生阅读能力可以通过学业效能感影响学业情绪。</p

Prediction of Energy Resolution in the JUNO Experiment

International audienceThis paper presents the energy resolution study in the JUNO experiment, incorporating the latest knowledge acquired during the detector construction phase. The determination of neutrino mass ordering in JUNO requires an exceptional energy resolution better than 3% at 1 MeV. To achieve this ambitious goal, significant efforts have been undertaken in the design and production of the key components of the JUNO detector. Various factors affecting the detection of inverse beta decay signals have an impact on the energy resolution, extending beyond the statistical fluctuations of the detected number of photons, such as the properties of liquid scintillator, performance of photomultiplier tubes, and the energy reconstruction algorithm. To account for these effects, a full JUNO simulation and reconstruction approach is employed. This enables the modeling of all relevant effects and the evaluation of associated inputs to accurately estimate the energy resolution. The study reveals an energy resolution of 2.95% at 1 MeV. Furthermore, the study assesses the contribution of major effects to the overall energy resolution budget. This analysis serves as a reference for interpreting future measurements of energy resolution during JUNO data taking. Moreover, it provides a guideline in comprehending the energy resolution characteristics of liquid scintillator-based detectors