鲤TYK2基因的克隆鉴定及组织表达分析

两面神激酶(JAK,Janus kinase)是一类酪氨酸蛋白激酶(PTK,protein tyrosine kinase),迄今已发现有4个成员,即JAK1、JAK2、JAK3和TYK2(Tyrosine kinase 2),JAK分子具有7个独特的结构域,从C端到N端依次为JAK同源区1(JAK homology 1,JH1)-JH71。细胞因子与相应受体结合后,JAK与受体偶联并发生酪氨酸磷酸化而激活,活化的JAK能催化受体上特定部位的酪氨酸残基磷酸化,形成信号转导和转录激活因子(Signal Transducer and Activator of Transcription,STAT)等含Src同源区2(SH2,Sr

Preliminary ecological study of the macrobenthos during summer in Linluobei Bay of Shandong Rongcheng

利用2010年7月在山东荣成临洛北湾所获得大型底栖动物定量分析资料,研究了夏季该海域海带养殖区和邻近水域大型底栖动物在物种组成、生物量、丰度、优势种以及物种多样性等方面的特征和空间差异,并采用MDS和CLUSTER分析了大型底栖动物的群落结构,以期为该地区以后的科学研究提供基础数据。结果表明,本次调查通过采泥和拖网共采集到大型底栖动物88种,其中采泥得到大型底栖动物51种,拖网采得大型底栖动物45种,各站位的物种多样性差异明显,物种数量从2种到21种。与环境因子的相关性分析显示,各站的物种数和丰度与DO存在明显的负相关。在所有大型底栖动物中,甲壳动物26种,多毛类环节动物24种,软体动物23种..

山东荣成临洛北湾夏季大型底栖动物群落生态学初步研究

利用2010年7月在山东荣成临洛北湾所获得大型底栖动物定量分析资料,研究了夏季该海域海带养殖区和邻近水域大型底栖动物在物种组成、生物量、丰度、优势种以及物种多样性等方面的特征和空间差异,并采用MDS和CLUSTER分析了大型底栖动物的群落结构,以期为该地区以后的科学研究提供基础数据。结果表明,本次调查通过采泥和拖网共采集到大型底栖动物88种,其中采泥得到大型底栖动物51种,拖网采得大型底栖动物45种,各站位的物种多样性差异明显,物种数量从2种到21种。与环境因子的相关性分析显示,各站的物种数和丰度与DO存在明显的负相关。在所有大型底栖动物中,甲壳动物26种,多毛类环节动物24种,软体动物23种..

CdCl₂-BaCl₂-KCl（NaCl）和CdF₂-BaF₂-CdCl₂体系—卤化镉玻璃的形成和性质

镉的卤化物玻璃是一类新的红外光学材料。本文叙述CdCl2-BaCl2-KCl（NaCl）系和CdF2-BaF2-CdCl2。系玻璃的合成及某些性质。这些玻璃在红外透过、传输CO2激光和制作超低损耗光纤方面具有潜在的应用

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