2010年，厦大讲座大盘点

厦门大学《凌云报》第56期第二版学术观察据不完全统计，今年，我校共举办各类讲座六百余场，主讲的几百名专家、学者、教授、社会人士有着不同的文化和学科背景。他们来自世界各地，有的是学术泰斗，有的是学界新贵，有的是青年领袖……他们的声音点燃了厦大人的思维，活跃了厦大人的思想。 　　2010年，承载着思想火花的厦大讲台上，我们盘点那些值得我们铭记的一切。厦门大学研究生

厦大师生聚焦学术规范

厦门大学《凌云报》第二版学术观察2010年8月29日，以“学术界打假斗士”而闻名的方舟子在北京住所附近遭遇伏击。此案后被证实与“肖氏反射弧”技术发明人肖传国因方舟子的举报未能入选中国科学院院士一事有关。这一因学术打假而导致的恶性事件，令学术不端行为再次成为公众关注的焦点。从浙大“贺海波论文造假事件”到《晶体学报》E分卷撤销井冈山大学90余篇论文，从东北财经大学“史上最牛硕士论文抄袭事件”到上海大学博导陈湛匀论文抄袭事件……仅在2009年，媒体曝光的学术不端事件就有近十起。2010年，叱吒商界多年的唐骏被方舟子质疑“学历造假”，在学术界享有盛誉的学者汪晖、朱学勤也被指在学术规范方面存在疏漏。而在中科协2009年公布的《第二次全国科技工作者状况调查报告》中，超过55.5%的科技工作者表示，确切知道自己周围的研究者有过至少一种学术不端行为。厦门大学研究生

Humic nanoparticles for remediation of Cd- contaminated soils

Extraneous humic substances could alter the dynamics of Cd in soils. An insoluble humic acid, produced from a leonardite, was used in laboratory experiment as an adsorbent to immobilize Cd in a silt-loam soil near a smelting plant and a Cd-spiked and aged sandy-loam soil, whereas a soluble peat-derived potassium humate was employed as a washing agent to mobilize Cd in, and remove it out of, the contaminated soils. Addition of 2% humic acid could reduce CaCl_2 extractable Cd in a soil (0.103 mg·L~(-1)) by 19.7%. This immobilization effect was greater in sandy-loam soil than in silt-loam soil. Similarly, Cd removed from the contaminated soils increased with washing agent dosage. A single washing at 10 g·L~(-1) of potassium humate removed up to 38.1% of the total Cd in soils. Fourier transform infrared spectroscopic analysis indicated the formation of Cd-carboxyl complex. This study suggests that Cd-contaminated soils can be remediated by humic substances through either an immobilization or mobilization process. The key to the success is to select humic substances with a suitable solubility: water insoluble humic acid for Cd immobilization and water soluble potassium humate for effective removal of Cd out of soils

Study Progress of Interaction Between Jasmonates and the Singlet Oxygen

茉莉酸类化合物包括茉莉酸及其衍生物,是一类基本的植物激素,作为信号分子在植物的生长发育和胁迫信号响应过程中具有重要的作用。在茉莉酸类化合物对外界环境防御和调控细胞凋亡过程中,与单线态氧相互作用。现主要介绍了茉莉酸类化合物信号转导过程与单线态氧的相互作用

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

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