圈养华南虎血常规正常参考值的初步研究

以建立华南虎血液血常规指标的正常参考值范围为目的，选取国内各动物园和繁育基地饲养的健康华南虎采集血液样本作为研究对象，采用全自动（兽用）血常规分析仪的电阻抗法和射频技术测定血常规指标［白细胞（WBC）、红细胞（RBC）、血红蛋白（HGB）、血小板（PLT）等］。华南虎血液血常规指标的正常参考值范围（95%概率）：WBC（5.45—18.92）109/L、RBC（5.95—10.21）1012/L、HGB（102—187）g/L、PLT（24—621）109/L等，不同性别间华南虎血常规各项指标差异不显著（P>0.05），与其他虎亚种相关血常规指标存在差异。华南虎血常规指标正常参考值范围不同于其他虎亚种，建立华南虎血常规指标正常值对华南虎的饲养管理、疾病诊治预防和保育繁殖研究工作很有必要

Preparation and Electrochemical Behavior of PbO/GN/AC

将商业活性炭和石墨烯在饱和硝酸铅溶液中超声浸渍，并通过化学沉积结合高温煅烧制备了氧化铅/石墨烯/活性炭(PbO/GN/AC)复合材料. 采用XRD、SEM、EDS等手段对复合物进行了物相及微观结构表征. 测试结果发现，PbO（约200 nm）颗粒均匀的分散在活性炭和石墨烯的表面. 复合物表现出优异的电化学性能，具有较高的析氢过电位；比电容高达312.6 F·g-1；等效串联内阻仅为1.56 Ω. 6000次循环之后，复合物电极的电容保持率仍达到92.6%. 将5wt%的Pb(PbO)/活性炭材料加入到铅酸电池负极铅膏中制备相应铅炭超级电池，循环次数达到18051次，是普通铅酸蓄电池的3.5倍.The lead oxide/graphene/activated carbon (PbO/GN/AC) composite materials were prepared by impregnating commercial activated carbon and graphene in saturated lead nitrate solution followed by calcination. The structures and morphologies of the composite were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). The results show that PbO crystals (about 200 nm) were dispersed uniformly on the surface of activated carbon and graphene. Electrochemical data indicate that the composite exhibited good electrochemical performances. The PbO/GN/AC composite possessed the higher over-potential of hydrogen evolution and the high specific capacitance of 312.6 F·g-1, while the internal resistance was 1.56 Ω. The composite electrode also displayed excellent cycling stability, retaining over 92.6% of its initial charge after 6000 cycles. The ultra-battery with 5% (by mass) PbO/GN/AC being added to the negative paste had a cycle life approximately 3.5 times longer than conventional lead-acid batteries.National Key Technology Research and Development Program of the Ministry of Science and Technology of China作者联系地址：浙江工业大学 化学工程与材料学院，绿色化学合成技术国家重点实验室培育基地，浙江 杭州310032Author's Address: State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, College of Chemical Engineering and Materials Science, Zhejiang University of Technology, Hangzhou 310032, China通讯作者E-mail：[email protected]

华南虎染色体核型分析及带型模式建立研究

采用外周血淋巴细胞培养及G带染色体标本制作技术，研究和分析华南虎（Panthera tigris amoyensis）染色体的核型和带型。结果表明：华南虎二倍体染色体数为 2n=38条，其中常染色体18对，性染色体1对。常染色体按相对长度从长到短依次编号为1~18。根据着丝粒指数可将华南虎染色体分为4组，即A组（m），包括2、5、13、18和X；B组（Sm），包括1、4、7、8、9、10、11、12、14、17和Y；C组（St），包括3、6；D组（t），包括15、16。核型公式为8（m）+20（Sm）+4（St）+4（t），XY（m，Sm）/XX（m，m）。本研究成功制备了华南虎染色体核型标本，初步建立了华南虎染色体G带核型模式图谱。经比对，发现华南虎与东北虎（P.t.altaica）染色体核型存在明显差异，可为虎亚种的分类研究提供依据，同时能为华南虎种群基因多样性及遗传学研究提供新的参考和开辟新的途径

JUNO Sensitivity on Proton Decay p→νˉK+p\to \bar\nu K^+ Searches

The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator detector designed to explore many topics in fundamental physics. In this paper, the potential on searching for proton decay in $p\to \bar\nu K^+$ mode with JUNO is investigated.The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification. Moreover, the excellent energy resolution of JUNO permits to suppress the sizable background caused by other delayed signals. Based on these advantages, the detection efficiency for the proton decay via $p\to \bar\nu K^+$ is 36.9% with a background level of 0.2 events after 10 years of data taking. The estimated sensitivity based on 200 kton-years exposure is $9.6 \times 10^{33}$ years, competitive with the current best limits on the proton lifetime in this channel

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

JUNO sensitivity on proton decay p → ν K + searches*

The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator detector designed to explore many topics in fundamental physics. In this study, the potential of searching for proton decay in the $p\to \bar{\nu} K^+$ mode with JUNO is investigated. The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification. Moreover, the excellent energy resolution of JUNO permits suppression of the sizable background caused by other delayed signals. Based on these advantages, the detection efficiency for the proton decay via $p\to \bar{\nu} K^+$ is 36.9% ± 4.9% with a background level of $0.2\pm 0.05({\rm syst})\pm$$0.2({\rm stat})$ events after 10 years of data collection. The estimated sensitivity based on 200 kton-years of exposure is $9.6 \times 10^{33}$ years, which is competitive with the current best limits on the proton lifetime in this channel and complements the use of different detection technologies