957 resultados para 14-MUC 7


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This study measures productive inefficiency within the context of multi-environmental pollution (eco-efficiency) in the Chinese industrial sector. The weighted Russell directional distance model is applied to measure eco-efficiency using production technology. The objective is to clarify how external factors affect eco-efficiency. The major findings are that both foreign direct investment and investment for pollution abatement improve eco-efficiency as measured by air pollutant substances. A levy system for wastewater discharge improves eco-efficiency as measured by wastewater pollutant substances. However, an air pollutant levy does not significantly affect eco-efficiency as measured by air pollutants.

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Two inorganic-organic hybrid framework iron phosphate-oxalates, I, [N2C4H12](0.5)[Fe-2(HPO4)(C2O4)(1.5)] and II, [Fe-2(OH2)PO4(C2O4)(0.5)] have been synthesized by hydrothermal means and the structures determined by X-ray crystallography. Crystal Data: compound I, monoclinic, spacegroup = P2(1)/c (No. 14), a=7.569(2) Angstrom, b=7.821(2) Angstrom, c=18.033(4) Angstrom, beta=98.8(1)degrees, V=1055.0(4) Angstrom(3), Z=4, M=382.8, D-calc=2.41 g cm(-3) MoK alpha, R-F=0.02; compound II, monoclinic, spacegroup=P2(1)/c (No. 14), a=10.240(1) b=6.375(3) Angstrom, 9.955(1) Angstrom, beta=117.3(1)degrees, V=577.4(1) Angstrom(3), Z=4, M=268.7, D-calc=3.09 g cm(-3) MoK alpha, R-F=0.03. These materials contain a high proportion of three-coordinated oxygens and [Fe2O9] dimeric units, besides other interesting structural features. The connectivity of Fe2O9 is entirely different in the two materials resulting in the formation of a continuous chain of Fe-O-Fe in II. The phosphate-oxalate containing the amine, I, forms well-defined channels. Magnetic susceptibility measurements show Fen to be in the high-spin state (t(2g)(4)e(g)(2)) in II, and in the intermediate-spin state (t(2g)(5)e(g)(1)) in I.

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Brown spot (caused by Alternaria alternata) is a major disease of citrus in subtropical areas of Australia. A number of chemicals, the strobilurins azoxystrobin, trifloxystrobin, pyraclostrobin and methoxycrylate, a plant activator (acibenzolar), copper hydroxide, mancozeb, captan, iprodione and chlorothalonil/pyrimthanil were tested in the field for its control. Over three seasons, trees in a commercial orchard received 16, 14 and 7 fungicide sprays, respectively, commencing at flowering in the first season, and petal fall in the later seasons. In all experiments, the strobilurins used alone, or incorporated with copper and mancozeb, were as effective as, or better than the industry standard of copper and mancozeb alone. The only exception was trifloxystrobin, which when used alone was less effective than the industry standard. Acibenzolar used alone was ineffective. Applying a mixture of azoxystrobin and acibenzolar was found to reduce the incidence of brown spot compared with applying azoxystrobin alone but, in either case, disease levels were not found to be significantly different to the industry standard. Captan, iprodione and chlorothalonil/pyrimthanil were as effective as the industry standard. The incidence and severity of rind damage were significantly lowest in the azoxystrobin, methoxycrylate, iprodione and chlorothalonil/pyrimthanil treatments. Medium and high rates of trifloxystrobin (0.07 g/L, 0 .15 g/L) and pyraclostrobin (0.8 g/L, 1.2 g/L) applied alone were the only treatments found to be IPM-incompatible as shown by the elevated level of scale infection on fruit.

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Digital image

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The structures of three new diterpenes, calyone, calyenone, and precalyone, isolated from the aerial portion of Roylea calycina have been shown to be 3-acetoxy-15,16-epoxy-9-hydroxylabda-1 3(16),14-dien-7-one (2), 3-acetoxy-15,16-epoxylabda-8,13(16),14-trien-7-one (5), and 3-acetoxy-9,13;15,16-diepoxylabda-14-en-7-one (7), respectively, by chemical and spectroscopic studies. Precalyone showed antitumor activity against P-388 lymphocytic leukaemia.

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The preparation of semisolid slurry of A356 aluminum alloy using an oblique plate was investigated. A356 alloy melt undergoes partial solidification when it flows down on an oblique plate cooled from underneath by counter flowing water. It results in continuous formation of columnar dendrites on plate wall. Due to forced convection, these dendrites are sheared off into equiaxed/fragmented grains and then washed away continuously to produce semisolid slurry at plate exit. Melt pouring temperature provides required condition of solidification whereas plate inclination enables necessary shear for producing semisolid slurry of desired quality. Slurry obtained was solidified in metal mould to produce semisolid-cast billets of desired microstructure. Furthermore, semisolid-cast billets were heat treated to improve surface quality. Microstructures of both semisolid-cast and heat-treated billets were analyzed. Effects of melt pouring temperature and plate inclination on solidification and microstructure of billets produced using oblique plate were described. The investigations involved four different melt pouring temperatures (620, 625, 630 and 635 degrees C) associated with four different plate inclinations (30 degrees, 45 degrees, 60 degrees and 75 degrees). Melt pouring temperature of 625 degrees C with plate inclination of 60 degrees shows fine and globular microstructures and it is the optimum.

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En el presente trabajo se evaluó EX-ante la factibilidad técnica y financiera de una propuesta de desarrollo ganadero para la finca "El Garabato" planteada por los socios de la Cooperativa Ezequiel N24 en el Municipio de Tola, Departamento de Rivas. Para ello se realizó un diagnóstico general de la finca, donde se determinó los recursos disponibles y las características propias del sistema productivo, basados en esto se estimaron los diferentes coeficientes técnicos así como las posibles fuentes de ingresos y egresos, permitiendo realizar las proyecciones del hato así como las proyecciones financieras, Dentro de los aspectos técnicos se determinó la composición de las pasturas donde el 69% de los pastos son naturalizados, el 23% son pastos mejorados y el 8% está conformado por pastos naturales. Los canales de comercialización en la zona del proyecto para la leche están representados por los manteros, el Proyecto Juan Agustín Guillén de la Tienda Campesina y el Centro de Acopio de La Selecta. En el caso de la carne por los intermediarios (matarifes) y productores dedicados a la crianza y engorde de novillos. Al considerar las inversiones en pastura que conlleva la propuesta, la distribución de pastos varia, ocupando los pastos mejorados el 41%, el 3% por pastos naturales y el 56% corresponden a pastos naturalizados. A la par de esto el área ganadera se incrementa en 64 mz. como consecuencia de la reducción del área agricola por la misma cantidad de mz. Las disponibilidades de pastos se ven mejoradas por las inversiones, disminuyendo el déficit de alimento a partir del segundo año. El uso de la Caña de Azúcar más urea, durante el verano permitirá mejorar la oferta de alimento para esta época, resultando menores pérdidas en la producción. Como efecto de la propuesta se producirá un incremento promedio anual de 7.18% del hato total, este incremento se da esperando que los índices de mortalidad de adultos y terneros disminuyan de un 4 al. 2% y de 14 al 7% respectivamente y que la tasa de descarte de vacas se mantenga en 12%1 considerando que la finca mantenga un 67% en tasa de natalidad. Al estructurar los gastos se encontró que en el año base los gastos de mano de obra representan el 71%, la suplementación el 8%, los gastos en manejo fueron de 8%, impuestos 7%, mantenimiento de equipo e infraestructura de 4% y gastos varios de 1%, con el proyecto esta estructura de gastos se ve un poco alterada al disminuir los gastos por mano de obra a un 63% e incrementarse los gastos por suplementacion y gastos varios a 12% y 6% respectivamente, el resto de los gastos presentan leves modificaciones. En los ingresos del año base la producción de leche representa el 46%, la producción de carne el 53% y el 1% corresponde a otros ingresos. Con el proyecto el aporte en los ingresos por producción de leche asciende a 62% y en producción de carne es de 34%, en otros ingresos representa el 4% al finalizar el sexto año. De las inversiones que se realizaran el 60% ésta destinado para pastos y el 40% corresponde a inversiones en infraestructura. El monto total de la inversión asciende a C$96,905.70 de los cuales el 71% será solicitado en préstamo y el restante 29% será asumido por la Cooperativa. Del análisis financiero resultó que la propuesta de los socios con uso de financiamiento para las inversiones a una tasa de interés del 12.5% presenta un VAN de C$41996.65 y una TIR de 15.16%. En cambió la realización de la propuesta con recursos propios presentó resultados superiores al anterior siendo el VAN de C$18,506.01 y una TIR de 18.01%•. Considerando estos resultados la propuesta es rentable, pero debido al déficit de efectivo que se presenta en los primeros años podría alterar la realización de las inversiones, ésta situación puede compensarse haciendo uso de otros recursos de la Cooperativa.

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Analisa os aspectos políticos do discurso fundador das mídias legislativas da Câmara dos Deputados. Tal discurso compreende os argumentos e justificativas dos responsáveis pela criação, gestão e produção de conteúdos desses veículos e contempla três aspectos: (1) justificativa baseada no princípio constitucional da publicidade; (2) contraposição à agenda negativa da mídia privada sobre o Poder Legislativo; (3) defesa institucional dos veículos legislativos, especialmente política editorial e estratégias de divulgação

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Aldizkariaren sarrera

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7 cartas y 1 tarjeta postal (mecanografiadas y manuscritas) ; entre 215x275mm y 160x112mm. Ubicación: Caja 1 - Carpeta 75

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This paper describes some characteristic features of the phytoplankton of Grasmere, one of the smaller of the principal lakes of the English Lake District, and attempts to relate these to distinctive physical and chemical properties of the lake. Quantitative data presented herein are derived from 5-m vertical column samples, collected with a flexible polyethylene hose close to the deepest point of Grasmere, generally at intervals of 14 days ( 7 days from 1972 to 1978, inclusive). The study concludes that although Grasmere has been subject to increased phosphorus-loading and has quickly developed many features associated with eutrophication, the composition of its plankton has retained the characteristics of a mesotrophic, soft-water lake: a vernal diatom maximum, generally dominated by Asterionella, is followed by summer growths of nanoplanktonic species, of various colonial Chlorophyceae, before a substantial return to Asterionella-dominance in the autumn.

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To investigate the possibility that oil and gas platforms may reduce recruitment of rockfishes (Sebastes spp.) to natural habitat, we simulated drift pathways termed “trajectories” in our model) from an existing oil platform to nearshore habitat using current measurements from high-frequency (HF) radars. The trajectories originated at Platform Irene, located west of Point Conception, California, during two recruiting seasons for bocaccio (Sebastes paucispinis): May through August, 1999 and 2002. Given that pelagic juvenile bocaccio dwell near the surface, the trajectories estimate transport to habitat. We assumed that appropriate shallow water juvenile habitat exists inshore of the 50-m isobath. Results from 1999 indicated that 10% of the trajectories represent transport to habitat, whereas 76% represent transport across the offshore boundary. For 2002, 24% represent transport to habitat, and 69% represent transport across the offshore boundary. Remaining trajectories (14% and 7% for 1999 and 2002, respectively) exited the coverage area either northward or southward along isobaths. Deployments of actual drifters (with 1-m drogues) from a previous multiyear study provided measurements originating near Platform Irene from May through August. All but a few of the drifters moved offshore, as was also shown with the HF radar-derived trajectories. These results indicate that most juvenile bocaccio settling on the platform would otherwise have been transported offshore and perished in the absence of a platform. However, these results do not account for the swimming behavior of juvenile bocaccio, about which little is known.

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A fibrose pulmonar é uma doença pulmonar crônica caracterizada pelo acúmulo excessivo de matriz extracelular (MEC) e um remodelamento na arquitetura pulmonar. Embora já se saiba da participação do estresse oxidativo e da inflamação na fibrose de forma isolada, é importante observar como se comporta o estresse oxidativo na fibrose quando esta ocorre associada a uma doença de base. O presente estudo teve como objetivo investigar o perfil inflamatório e oxidativo na fibrose pulmonar associado ao enfisema pulmonar prévio. Camundongos C57BL/6 foram divididos em três grupos: grupo controle (n=5) que receberam salina intranasal (50 l) e foram sacrificados no 21 dia; grupo bleomicina (BLEO) (n=15) que receberam bleomicina intratraqueal (0.1 U/animal) no dia 0 e foram sacrificados nos 7 (n=5), 14 (n=5) e 21 (n=5) dias e grupo PPE (elastase) + BLEO (n=21) que receberam elastase (3U/animal) e após 14 dias receberam bleomicina e foram sacrificados nos 14(n=7), 21 (n=7), 28 (n=7) e 35 (n=7) dias. Foram realizadas análises histológicas através de H&E e picro-sirius; análises bioquímicas para superóxido dismutase (SOD), catalase (CAT), glutationa peroxidase (GPx) e glutationa-S-transferase (GST) e ELISA para Interleucina (IL)-1β e IL-6. A fibrose pulmonar ocorreu a partir do 14 dia (p<0.001) e o enfisema concomitante a fibrose pulmonar a partir do 28 dia (p<0.001) e um aumento de fibras colágenas no grupo BLEO 21(p<0.001) e PPE + BLEO 21(p<0.001). As enzimas antioxidantes CAT (p<0.01), SOD (p<0.01) e GPx (p<0.01) reduziram e a GST aumentou no grupo BLEO 21 dias (p<0.05). No grupo PPE + BLEO 21 dias houve redução das enzimas antioxidantes CAT, SOD, GPx (p<0.05) e GST. Os níveis de óxido foram altos nos grupos BLEO 21 dias (p<0.01) e PPE + BLEO 21 dias (p<0.01). A IL-1β mostrou-se elevada no grupo BLEO 7 dias quando comparado ao controle (p<0.001) e ao grupo PPE + BLEO 7 dias (p<0.01). Concluímos que a resposta inflamatória inibiu a ação do sistema antioxidante contribuindo para o agravamento da lesão. Isso sugere que terapias anti-inflamatórias podem contribuir tanto para redução da resposta inflamatória quanto de forma indireta no sistema antioxidante.

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本文应用植物引种驯化,栽培学及植物化学的理论方法对引入我国的迷迭香(Rosmarinus officinalisL.)精油和抗氧化剂进行了研究.主要结果如下; 1、昆明地区的生态气候条件最适宜迷迭香生长。南京地区局部良好环境也能满足迷迭香正常生长需要。北京地区在保护栽培的情况下,迷迭香才能够安全越冬。 2、用GC-MS和GC-IR鉴定了迷迭香精油的23种成分。不同采收期精油成分含量变化有3种类型,即似单峰曲线,似8曲线和w曲线。一年生与二年生苗在精油成分含量上略有差异。与主要栽培国相比,我国不同引种地精油成分化学类型各具特点,北京地区α—蒎稀(31.58%)含量很高,南京地区富含樟脑(14.86%)乙酸龙脑酯(7.97%)和龙脑(6.90%)含量也相对较高,昆明地区则是α—蒎稀(24.32%)和1.8—桉叶油素(24.43%)含量并重。 乙酸龙脑酯含量的高低对精油香气质量优劣起关键作用。北京地区雨季来临收获(7月初)精油香气质量最好。南京地区,11月初精油香气质量也属优质。本实验未能得到高质量的昆明地区精油。 3、从迷迭香蒸油残渣中分离得到三种抗氧化成分,迷迭香酚( Rosrmanol)、鼠尾草酚(Carnosol)和迷迭香双醛(R0smadial),并用质谱,核磁做了鉴定.硫氰铁酸法、TBA法、AOM法检测了三种成分的抗氧化效能.Rosmanol对多双键不饱和脂肪酸抗氧化效果显著,Carnosol和BHT在不同双键脂肪酸中抗氧化效果稳定,Rosmadial的抗氧化效果则随不饱和双键数目的增加而降低。在猪油中,抗氧化效能的强度顺序为Rosmanol >carnosol>BR>Rosmadial。 抗氧化物质在植株体内是不断积累的。不同引种地迷选香抗氧化效能的强弱差异表现为昆明>北京>南京。 迷迭香的正己烷,两酮提取物抗氧化效能都是随着添加量的增加而增强、丙酮提取物的抗氧化效能优于正己烷提取物。 对迷迭香抗氧化剂提取工艺做了探讨,得到R-1,R—2,R-3三种小试样品,R-2,R-3的抗氧化效果优于BHT.B—l接近于BET。

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本文通过野外观测和实验室分析,研究了大血藤的繁育系统、开花习性、传粉方式和花粉-胚珠比等生殖生物学特征;我们还利用石蜡切片技术和扫描电镜观察研究了大血藤的花部形态解剖学和胚胎学特征,比较该类群与近缘类群的特征并讨论了其系统学意义;此外,我们研究了猫儿屎的胚胎学和花部结构特征,比较了它和近缘类群的相关特征并讨论其系统学意义。主要研究结果如下: 1.大血藤的传粉生物学研究 大血藤为单性花,雌雄同株。雄花单花花期7~10d,雌花单花花期2~3d,种群开花历时14~17d,散粉高峰期历时7天。大血藤花粉-胚珠比为(600±20),属兼性异交类型,花粉在体外适宜条件下存活可达24hs。大血藤的传粉方式还需要进一步研究。 大血藤形态上的两性花是功能上的雄花或雌花,大血藤花性的演化方向是从两性花到单性花。 2.大血藤的胚胎学研究 大血藤花药四室,成熟的花药壁由1层表皮、1层药室内壁、2层中层和1层绒毡层组成,绒毡层为分泌型。小孢子母细胞的减数分裂为同时型;成熟的花粉为2细胞。多心皮,离生,每个心皮只含一胚珠;成熟的胚珠横生、厚珠心,具有双珠被。胚囊的发育类型为蓼型。 3.猫儿屎的胚胎学研究 猫儿屎花药四室,成熟的花药壁由1层表皮、1层药室内壁、2-3层中层和1层绒毡层组成;绒毡层为分泌型。小孢子母细胞的减数分裂为同时型,四分体的排列方式为四面体型;成熟花粉为3细胞。子房由单心皮组成,胚珠2列。成熟胚珠倒生,厚珠心,双珠被,珠孔仅由内珠被组成。大孢子母细胞经过减数分裂形成T形排列的4个大孢子,其中珠孔端的3个大孢子逐渐退化,靠近合点端的1个大孢子发育为功能性大孢子。功能性大孢子发育为单核胚囊,单核胚囊的核经过3次有丝分裂,结果形成7细胞8核的成熟胚囊(即2个助细胞,1个卵细胞,1个含有2核的中央细胞和3个反足细胞)。胚囊发育类型为单孢子蓼型,成熟的胚囊中反足细胞宿存。胚乳发育为细胞型。 4.系统学研究 猫儿屎属、串果藤属和大血藤属的胚胎学和花部结构特征相比较,猫儿屎属存在3个显著的特点:反足细胞宿存而其它两属的反足细胞存在时间较短;反足细胞较大而其它两属的反足细胞较小;猫儿屎属花部无花瓣而串果藤属有花瓣,大血藤属花瓣退化。 生殖生物学特征支持大血藤属作为木通科内一个亚科的处理方式;猫儿屎属与串果藤属的关系最为近缘。