Effects of parameters on mass index of the CHES-FY system

The main content dealt with in this paper is to discuss effects of parameters (bending rigidity, sample size and sensor resolution) on one featured index measured by the comprehensive handle evaluation system for fabrics and yarns (CHES-FY) system, which is named as mass index utilized to on-line evaluate mass of fabric so as to make quick inspection on evenness of fabric under coating and finishing. Based on the deformation shape of fabric in the weighting step of the CHES-FY system, the mass index was featured from the pulling-out force and distance curve. Comparisons between the mass index measured by the CHES-FY system and mass by electronic balance were conducted. It shows that good correlation exists between theoretical and experimental values. Furthermore, effects of bending property and specimen size as well as sensor resolution were discussed, which indicated that variation of the mass index exhibited quadratic relations with bending rigidity of fabric. Moreover, the mass index’s result could be significantly improved to precisely evaluate mass of fabric by selecting both high resolution of sensor and specimen size in width. It demonstrates that the mass index can be adopted to characterize mass of fabric, and the CHES-FY system can be utilized to have on-line and accurate inspection on mass of fabric.     

武夷山市入侵植物的调查与分析

为了摸清武夷山市外来入侵植物的状况,通过野外实地调查、标本采集及鉴定,并结合相关资料,对武夷山市入侵植物的种类组成、原产地、生活型、入侵途径、入侵性等方面进行分析。结果表明:武夷山市现有外来入侵植物67种,隶属27科56属,其中菊科、禾本科、苋科、豆科4个科共计36种,占入侵植物总种数的53.7%;武夷山市入侵植物的生活型以陆生草本为主,有56种,占总种数的83.6%;从入侵植物的来源地看,来自美洲的种类最多,达47种,占总种数的70.2%;从引入途径看,有37种属于有意引入,其余30种属无意引入。将入侵植物的入侵性分为甲、乙、丙3个等级,属于甲级的有空心莲子草、豚草、假高粱、凤眼莲等11种。目前对武夷山市生态环境危害较为严重的入侵植物是大狼把草、加拿大蓬、胜红蓟、野茼蒿、钻形紫菀、白茅等。通过与福建邻近省市外来入侵植物种类组成的比较分析,提出了若干预防和控制入侵植物的建议和对策,为武夷山市外来入侵植物的管理与防范工作提供了科学依据。     

夏威夷毛棉第三次考察简报

在2011和2012年工作基础上,于2013年9月23日-10月2日再次赴美国夏威夷州进行毛棉考察,重点考察了拉奈岛（Lanai）和莫洛凯岛（Molokai）。在包括瓦胡岛（Oahu）在内的3个主岛上,共采集到20份棉花样品,特别是发现了特大的毛棉原始居群,具有珍贵的保存价值。另外,总结了野外考察的体会,分析了毛棉居群的生存状态。     

对棉花生产发展问题的哲学思考

运用哲学的观点来思考棉花生产发展问题,认为发展棉花生产的核心理念是以人为本,根本途径是实践,思维方式是辩证思维;要尊重棉农的实践创造,遵循棉花生产的市场经济规律,兼顾棉农利益.     

2008—2012年贵州省棉花种质资源调查

对贵州省南部山区进行多年的棉花种质资源搜集和调查,实地走访了23个县（市）,超过200个村（镇）,共搜集到棉花种质资源155份,包括45份亚洲棉和110份陆地棉。经过室内种子筛选和田间调查发现,贵州棉花种质资源表型多样性丰富,陆地棉种质资源中存在大量的退化陆地棉。这些地方品种对拓展陆地棉遗传多样性具有重要的意义。此外,结合调查对贵州棉花种质资源的分布和形势进行了探讨。     

First Report of a Peroxiredoxin Homologue in Jellyfish: Molecular Cloning,Expression and Functional Characterization of CcPrx4 from Cyanea capillata

We first identified and characterized a novel peroxiredoxin (Prx), designated as CcPrx4, from the cDNA library of the tentacle of the jellyfish Cyanea capillata. The full-length cDNA sequence of CcPrx4 consisted of 884 nucleotides with an open reading frame encoding a mature protein of 247 amino acids. It showed a significant homology to peroxiredoxin 4 (Prx4) with the highly conserved F-motif (⁹³FTFVCPTEI¹⁰¹), hydrophobic region (²¹⁷VCPAGW²²²), ¹⁴⁰GGLG¹⁴³ and ²³⁹YF²⁴⁰, indicating that it should be a new member of the Prx4 family. The deduced CcPrx4 protein had a calculated molecular mass of 27.2 kDa and an estimated isoelectric point of 6.3. Quantitative real-time PCR analysis showed that CcPrx4 mRNA could be detected in all the jellyfish tissues analyzed. CcPrx4 protein was cloned into the expression vector, pET-24a, and expressed in Escherichia coli Rosetta (DE3) pLysS. Recombinant CcPrx4 protein was purified by HisTrap High Performance chelating column chromatography and analyzed for its biological function. The results showed that the purified recombinant CcPrx4 protein manifested the ability to reduce hydrogen peroxide and protect supercoiled DNA from oxidative damage, suggesting that CcPrx4 protein may play an important role in protecting jellyfish from oxidative damage.     

The synthesis of core-shell monodisperse P(St-MAA) microspheres and fabrication of photonic crystals Structure with Tunable Colors on polyester fabrics

The core-shell monodisperse P(St-MAA) microspheres with different diameters ranging from 200 nm to 400 nm were prepared by soap-free emulsion copolymerization, in which styrene (St) and methacrylic acid (MAA) were polymerizable monomers, and ammonium persulfate (APS) acted as initiator. The diameters and monodispersity of P(St-MAA) microspheres could be controlled by adjusting the concentrations of styrene, methacrylic acid and ammonium persulfate. The core-shell structure and chemical component distribution of the P(St-MAA) microspheres were confirmed by TEM and XPS. The photonic crystals on polyester fabrics with three-dimensionally ordered arrangement were fabricated by self-assembly of gravitational sedimentation with P(St-MAA) microspheres and exhibited brilliant structural colors without any chemical dyes and pigments. SEM, TEM and crystallographic analysis were applied to confirm a face centered cubic (fcc) structure of the photonic crystals on polyester fabrics. The versatile structural colors of the photonic crystals were dependent on the photonic band-gap which could be regulated by the spherical size of P(St-MAA) microspheres and viewing angles. This technology may provide a new strategy to color the fabrics and reduce the pollution in the current textile industry.     

Synthesis and Evaluation of Some New Aza-B-homocholestane Derivatives as Anticancer Agents

Using analogues of some marine steroidal oximes as precursors, a series of aza-B-homocholestane derivatives possessing different substituted groups at the 3-position of the steroidal nucleus were synthesized. Their biological activity against cancer cell proliferation was determined with multiple cancer cell lines. Aza-B-homocholestane derivatives possessing 3-hydroxyl, 3-hydroximino and 3-thiosemicarbazone groups displayed remarkable cytotoxicity to cancer cells via apoptosis inducing mechanism. Compounds 5, 10, 12, 15 and 18 exhibited better potency to inhibit cancer cell proliferation. In addition, compound 15 was further evaluated with three dimensional (3D) multicellular spheroids assay to determine its potency against spheroid growth. The structure-activity relationship (SAR) generated in the studies is valuable for the design of novel chemotherapeutic agents.     

Modification of Marine Natural Product Ningalin B and SAR Study Lead to Potent P-Glycoprotein Inhibitors

In this study, new marine ningalin B analogues containing a piperazine or a benzoloxy group at ring C have been synthesized and evaluated on their P-gp modulating activity in human breast cancer and leukemia cell lines. Their structure-activity relationship was preliminarily studied. Compounds 19 and 20 are potent P-gp inhibitors. These two synthetic analogues of permethyl ningalin B may be potentially used as effective modulators of P-gp-mediated drug resistance in cancer cells.     

Allele Types of Rc Gene of Weedy Rice from Jiangsu Province,China

Weedy rice(Oryza sativa f. spontanea), the predominant type of which has a red pericarp, seriously inhibits growth and yield of direct-seeded rice in Jiangsu Province, China. In this study, we randomly selected 10 weedy rice accessions from 10 plots in Jiangsu, and then sequenced the full lengths of their Rc genes(approximately 6.4 kb). In addition, we collected 166 different full-length Rc genes in the Oryza genus from the literature and from GenBank. A collinearity sequence analysis showed that the 10 weedy rice accessions from Jiangsu all had the same wild-type allele of the Rc gene. Single nucleotide polymorphisms indicated that the nucleotide polymorphisms(π = 0.19) and the proportion of segregation sites(θw = 0.28) of the Rc genes in the 10 weedy rice accessions from Jiangsu were higher than those in 56 weedy rice accessions from USA(π = 0.09 and θw = 0.07). Haplotype and phylogenetic analyses showed that the Rc genes of weedy rice accessions from Jiangsu were not revertants of the rc gene found in Asian cultivated rice(O. sativa) varieties with white pericarp. In addition, Rc gene sequences of the rice varieties Lvdao from Lianyungang, Jiangsu and Tangdao from Anhui were more similar to those of cultivated rice than to the weedy rice from Jiangsu. These findings support the continued quarantine of weedy rice and clarify the evolutionary mechanism of the red pericarp found in the weedy rice of Jiangsu.