中子数 N=50核~(88)Sr的高自旋态

在用８２Ｓｅ束流和天然 Ｂａ靶之间的深部非弹反应研究类靶余核激发态时，Ｂａ靶严重氧化，８８Ｓｒ的激发态由１６Ｏ与８２Ｓｅ之间的融合蒸发反应产生．通过在束γ谱学方法测量了８８ Ｓｒ的退激 γ射线，提取了γ跃迁的 ＤＣＯ系数和角分布各向异性因子，对所有能级进行了自旋指定．在已知能级之上观测到了两个高自旋能级结构，自旋、激发能分别达到１３ｈ，８５２０ｋｅＶ和１２ｈ，７９０９ｋｅＶ．根据能级衰变特征和邻近Ｎ＝５０同中子素的能级结构系统性，对高自旋态的组态进行了讨论．

8×8单元CsI(Tl)探测阵列研制；Development of 88 CsI(Tl) array detector

描述了1个8×8单元CsI(Tl)探测阵列的结构和工作原理。探测阵列的每个单元是由1块前表面21 mm×21 mm、后表面23.1 mm×23.1 mm、高50 mm的CsI(Tl)棱台、1块光导和光电倍增管组成。在兰州放射性次级束流线(RIBLL)上对探测阵列进行测试,得到探测阵列对30 MeV质子的能量分辨可达2.7%,对170 MeV7Be可达1.5%,可很好地用于放射性束物理实验中带电粒子的鉴别。

8×8单元CsI(Tl)阵列探测器的研制

近二十年，世界上各大实验室相继建立了各具特色的放射性束流装置，放射性束物理得到了长足的发展，在实验上要求对反应产物进行全运动学测量且具有较高的精度，为实验探测装置提出了更高的要求。我们研制了8×8单元CsI(Tl)阵列探测器，主要用于测量核反应产物的能量和角分布、进行粒子的关联测量以及对粒子的鉴别。脉冲形状甄别（PSD）技术是一种重要的鉴别粒子的方法，已经从原来直接利用电子学硬件的方法发展到先采集到脉冲波形，进而进行离线分析，甚至利用现代数字信号处理(DSP)技术的在线分析。我们对该技术进行了一些初步的研究，为以后利用DSP技术研制PSD系统奠定了重要的基础。本论文工作的主要内容有：（1）探测器的研制和性能测试。该探测器由64块CsI(Tl)晶体组成,每块晶体由光电倍增管单独读出。该探测器覆盖较大的立体角，具有较好的能量分辨和粒子鉴别能力。本文对探测器的探测原理，结构及性能进行较详细的说明。（2）系统地对两部分比较法(Qfast/Qslow，Qfast/Qtotal，Qslow/Qtotal)进行了模拟计算，定性的分析了两部分的积分门的延迟和宽度，为实验提供了有效的指导。分别采集到α源和宇宙线(m子)两种脉冲波形，使用两部分比较、平均时间、确定幅度和确定时间四种方法进行离线分析，对四种分析方法进行比较，以选择甄别效果最好的分析方法。最后，对关于进一步工作的方向进行了简要的讨论

氯苯胁迫对蚕豆幼苗生长和细胞分裂的影响

研究了 1,2 ,4 三氯苯 (TCB)对蚕豆幼苗生长、根尖细胞分裂及染色体畸变的影响 .结果表明 ,随TCB浓度增加和处理时间延长 ,蚕豆幼苗根长的生长及根尖细胞有丝分裂指数降低甚至停止 .TCB诱发蚕豆根尖细胞有丝分裂过程中染色体数目畸变和结构畸变 .5 0～ 10 0 μg·g-1TCB胁迫 12～ 2 4h ,蚕豆根尖染色体的主要损伤形式为c 有丝分裂、染色体桥和不均匀排列 ,其出现百分率达 1.0 %～ 10 .3 % .30 0 μg·g-1TCB胁迫 12～ 96h ,蚕豆根尖细胞中染色体粘连 (S)、S +染色体断裂 (S +B)、S +染色体环 (S +R)、S +染色体不均匀排列 (S +A)及S +染色体桥 (S +Be)出现的百分率达 47.9%～ 88.9% ,各种类型染色体断裂出现的百分率仅为 18.1%～ 2 9.6 % ,说明蚕豆根尖细胞染色体畸变分析可作为TCB土壤污染监测的敏感生物监测指标 .

Identification and characterization of a myeloid differentiation factor 88 (MyD88) cDNA from Zhikong scallop Chlamys farreri

Myeloid differentiation factor 88 (MyD88) is a universal and essential adapter for the TLR/IL-1R family. In this report, the first mollusk Myd88 ortholog (named as CfMyd88) was cloned from Zhikong scallop (Chlamys farreri). The full-length cDNA of CfMyd88 was of 1554 bp, including a 5 '-terminal untranslated region (UTR) of 427 bp, a polyA tail, and an open reading frame (ORF) of 1104 bp encoding a polypeptide of 367 amino acids containing the typical TLR and IL-1R-related (TIR) domain and death domain (DD). Homology analysis revealed that the predicted amino acid sequence of CfMyd88 was homologous to a variety of previously identified Myd88s with more than 30% identity. The temporal expressions of CfMyd88 mRNA in the mixed primary cultured haemocytes stimulated by lipopolysaccharide (LPS) and peptidoglycans (PGN) were measured by real-time RT-PCR system. The mRNA expression of CfMyd88 decreased after stimulation with both LPS and PGN, and the lowest level was about 1/3 times (at 6 h) and 1/10 times (at 9 h) to that in the control group, respectively. The expression then recovered and was upregulated to two-fold at 9 h after LPS stimulation or to the original level at 12 It after PGN stimulation. The results suggest that the MyD88-dependent signaling pathway exists in scallop and was involved in the defense system. (c) 2007 Elsevier Ltd. All rights reserved.

Recomendações técnicas para a cultura da soja no Parana 1987/88.

Melhoramento de soja para alimentacao humana; Manejo do solo; Clima; Cultivares; Populacao e densidade de semeadura; Epocas de semeadura; Instalacao da lavoura; Controle de plantas daninhas; Manejo de pragas; Controle de doencas; Colheita.

Merely Birds of Passage: Lady Hariot Dufferin's Travel Writings and Medical Work in India, 1884-88

This article examines the travel writings and medical work in India of Lady Hariot Dufferin, Vicereine of India between 1884 and 1888. Lady Dufferin accompanied her husband, the Viceroy Lord Dufferin, through various social and political engagements in India, and carved her own niche in colonial and postcolonial history as a pioneer in the medical training of women in India. The article examines her travel writings on India and explores the nature of her complicity in the Raj, as well as the gendered nature of the separate public role she created for herself in relation to her 'zenana work' in providing medical care for the women of India. The author suggests that, through her work, Lady Dufferin challenges and extends the theoretical paradigms of postcolonialist and feminist critiques of empire.