Structural studies on a novel fucogalactan sulfate extracted from the brown seaweed Laminaria japonica

A low molecular weight fucogalactan, obtained from the brown seaweed Laminaria japonica, was separated into three fractions (LF1, LF2 and LF3) by DEAE-Sepharose FF column chromatography. All three fractions contained predominantly fucose, sulfate group and galactose. The results showed that the main fraction LF2 consisted of L-fucose, D-galactose and sulfate at a molar ratio 6:1:9. Structural study on the LF2 was carried out by NMR spectroscopy. The backbone of LF2 was primarily (1 -> 3)-linked alpha-L-fucopyranose residues (75%) and a few (1 -> 4)-alpha-L-fucopyranose linkages (25%). The branch points were at C-4 of 3-linked alpha-L-fucopyranose residues by beta-D-galactopyranose unites (35%, molar ratio) or at C-2 of 3-linked alpha-L-fucopyranose residues by non-reducing terminal fucose unites (65%, molar ratio). Sulfate groups occupied at position C-4 or C-2, sometimes C-2, 4 to fucose residues, and C-3 and/or C-4 to galactose residues. The structure of LF2 was supposed as following: [GRAPHICS] (C) 2010 Elsevier B.V. All rights reserved.

Comparison of the total amount of eggshell pigments in Dongxiang brown-shelled eggs and Dongxiang blue-shelled eggs

Based on the knowledge of the heme biosynthetic and metabolic pathway and the structures of biliverdin and protoporphyrin, experiments were carried out to compare the difference between the total quality of eggshell pigments in blue-shelled eggs and brown-shelled eggs from the same population (Dongxiang, China) and to analyze the correlation between the quantity of protoporphyrin and biliverdin in the 2 kinds of eggshells. It was found that there was no significant difference between the total quantity of eggshell pigments in Dongxiang blue-shelled eggs and Dongxiang brown-shelled eggs (P = 0.9006), and a highly significant positive correlation between the quantity of protoporphyrin and biliverdin in blue eggshells (P < 0.01) and a significant positive correlation between the quantity of protoporphyrin and biliverdin in brown eggshells (P < 0.05). These results suggested that eggshell protoporphyrin and eggshell biliverdin probably derived from common precursor material.

Seasonal regulations of energetics, serum concentrations of leptin, and uncoupling protein 1 content of brown adipose tissue in root voles (Microtus oeconomus) from the Qinghai-Tibetan plateau

Survival of small mammals in winter requires proper adjustments in physiology, behavior and morphology. The present study was designed to examine the changes in serum leptin concentration and the molecular basis of thermogenesis in seasonally acclimatized root voles (Microtus oeconomus) from the Qinghai-Tibetan plateau. In January root voles had lower body mass and body fat mass coupled with higher nonshivering thermogenesis (NST) capacity. Consistently, cytochrome c oxidase activity and mitochondrial uncoupling protein-1 (UCP1) protein contents in brown adipose tissues were higher in January as compared to that in July. Circulating level of serum leptin was significantly lower in winter and higher in July. Correlation analysis showed that serum leptin levels were positively related with body mass and body fat mass while negatively correlated with UCP1 protein contents. Together, these data provided further evidence for our previous findings that root voles from the Qinghai-Tibetan plateau mainly depend on higher NST coupled with lower body mass to enhance winter survival. Further, fat deposition was significantly mobilized in cold winter and leptin was potentially involved in the regulation of body mass and thermogenesis in root voles. Serum leptin might act as a starvation signal in winter and satiety signal in summer.

Smith预估器在纳米操作系统中的应用

针对纳米操作系统中存在的滞后性质,提出了带Smith预估器的PID控制方法。从理论上解决了纳米操作系统中由于纯滞后性质而引起的系统超调或振荡。从而保证了纳米操作中观测的精度和准确性。

Manejo da resistência de insetos-praga a inseticidas, com ênfase em Spodoptera frugiperda (Smith).

Detecção da resistência; Mecanismos da resistência de insetos a inseticidas; Base genética da resistência; Perspectiva genética no manejo da resistência; Aumento da dose do inseticida até que a resistência seja recessiva ou neutralizada; Uso de compostos que confiram menores níveis de resistência; Tratamento visando os estágios de vida do insetos mais vulneráveis; Uso de sinergismo para suprimir os mecanismos de resistência; Utilização de misturas de inseticidas; Decréscimo na dose de aplicação utilizando uma que mata a maioria dos insetos suscetíveis; Aplicação menos freqüente de inseticidas, de tal modo que os insetos suscetíveis tenham a oportunidade de reproduzir-se e, portanto, diluir a resistência pelo cruzamento com indivíduos resistentes; Uso de produtos químicos de curto período residual, evitando uso de formulações de liberações controladas dos ingredientes ativos, de modo que somente a população-alvo seja eliminada; ou seja, evitar que os colonizadores subseqüentes sejam afetados; Propiciar refúgios para o escape dos indivíduos suscetíveis; Fazer rotação dos pesticidas de modo que nem todas as gerações sejam expostas ao mesmo produto, evitando, porém, o tratamento espacial (em mosaico); Manejo da resistência de Spodoptera frugiperda a inseticidas; Táticas de manejo.

Efeito do inseticida Match e sua interação com os inimigos naturais no controle de Spodoptera frugiperda (Smith, 1797), na cultura do milho.

2005

Milho Bt: avaliação preliminar da resistência de híbridos comerciais à lagarta-do-cartucho, Spodoptera frugiperda (J. E. Smith 1797).

2008

Viabilidade do uso de hospedeiros alternativos como área de refúgio para o manejo da resistência da lagarta-do-cartucho, Spodoptera frugiperda (J. E. Smith) (Lepidoptera: Noctuidae) no cultivo do milho-Bt.

2008

Levantamento dos danos causados pela infestação de Spodoptera frugiperda (J.E. Smith) em lavouras comerciais de milho Bt na Região Central de Minas Gerais.

2009

Monitoramento de parasitoides de lagartas de Spodoptera frugiperda (J. E. Smith) (Lepidoptera: Noctuidae) em municípios de Minas Gerais, Brasil.

2009

Informações sobre duas espécies de timbó Derris urucu (Killip et Smith) Macbr e Derris nicou (Killip et Smith) Macbr., como plantas inseticidas.

1987

John Austin, H. L. A. Hart... Oh, And W. Jethro Brown!

Ireland, R. W., Cambrian Law Review, 34 pp.57-69 RAE2008

Warianty realizacji austriackości w wybranych autorów (Joseph Roth, Stefan Zweig, Franz Theodor Csokor i Ődön von Horváth) w odniesieniu do kategorii granicznych starego i nowego świata

Wydział Neofilologii:Instytut Filologii Germańskiej

Experiences of a backwoods preacher, or, Facts and incidents culled from thirty years ministerial life / by Joseph H. Hilts.

http://www.archive.org/details/experiencesofab00hiltuoft

Mission tales in the days of the dons, by Mrs. A.S.C. Forbes ... with nine full page illustrations and decorative drawings, by Langdon Smith.

http://www.archive.org/details/missiontalesday00forbrich