New neolignans from Talauma ovata     

Stefanello ME  Alvarenga MA  Toma IN 《Fitoterapia》2002,73(2):135-139

The hexane extract of the bark of Talauma ovata yielded three new natural neolignans, identified as acetyl oleiferin-C (4), acetyl oleiferin-F (7) and acetyl oleiferin-G (8), together with the known compounds dihydroguaiaretic acid (1), austrobailignan-5 (2), oleiferin-C (3), austrobailignan-6 (5) and oleiferin-F (6).  相似文献   

Heparin binding proteins from Leishmania (Viannia) braziliensis promastigotes     

Azevedo-Pereira RL  Pereira MC  Oliveria-Junior FO  Brazil RP  Côrtes LM  Madeira MF  Santos AL  Toma L  Alves CR 《Veterinary parasitology》2007,145(3-4):234-239

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Phenotypic and genotypic pyrethroid resistance of Aedes albopictus,with focus on the 2017 chikungunya outbreak in Italy     

Verena Pichler  Chiara Malandruccolo  Paola Serini  Romeo Bellini  Francesco Severini  Luciano Toma  Marco Di Luca  Fabrizio Montarsi  Marco Ballardini  Mattia Manica  Vincenzo Petrarca  John Vontas  Shinji Kasai  Alessandra della Torre  Beniamino Caputo 《Pest management science》2019,75(10):2642-2651

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Treadmill exercise prevents diabetes-induced increases in lipid peroxidation and decreases in Cu,Zn-superoxide dismutase levels in the hippocampus of Zucker diabetic fatty rats     

Jong Whi Kim  Junghyun Chae  Sung Min Nam  Yo Na Kim  Dae Young Yoo  Jung Hoon Choi  Hyo Young Jung  Wook Song  In Koo Hwang  Je Kyung Seong  Yeo Sung Yoon 《Journal of veterinary science (Suw?n-si, Korea)》2015,16(1):11-16

In the present study, we investigated the effects of treadmill exercise on lipid peroxidation and Cu,Zn-superoxide dismutase (SOD1) levels in the hippocampus of Zucker diabetic fatty (ZDF) rats and lean control rats (ZLC) during the onset of diabetes. At 7 weeks of age, ZLC and ZDF rats were either placed on a stationary treadmill or made to run for 1 h/day for 5 consecutive days at 16~22 m/min for 5 weeks. At 12 weeks of age, the ZDF rats had significantly higher blood glucose levels and body weight than the ZLC rats. In addition, malondialdehyde (MDA) levels in the hippocampus of the ZDF rats were significantly higher than those of the ZLC rats whereas SOD1 levels in the hippocampus of the ZDF rats were moderately decreased. Notably, treadmill exercise prevented the increase of blood glucose levels in ZDF rats. In addition, treadmill exercise significantly ameliorated changes in MDA and SOD1 levels in the hippocampus although SOD activity was not altered. These findings suggest that diabetes increases lipid peroxidation and decreases SOD1 levels, and treadmill exercise can mitigate diabetes-induced oxidative damage in the hippocampus.  相似文献   

兽用天花粉蛋白胶囊对胎衣不下的奶牛降低不孕率和提高受胎率的研究     

潘新权  郁国  陈志森  姚占清  黄明达  江绍福  金善炜 《上海交通大学学报(农业科学版)》1987,(2)

本试验的目的是应用兽用天花粉蛋白对胎衣不下的奶牛达到降低不孕率和提高受胎率。通过311头胎衣不下的奶牛试验表明,试验组比对照组平均提高受胎率13.87%,降低不孕率13.87%,一次受胎率比胎衣正常下落的奶牛提高15.44%。其机理有待进一步深入研究。  相似文献   

The effect of molecular weight and the linear velocity of drum surface on the properties of electrospun poly(ethylene terephthalate) nonwovens     

Kwan?Woo?Kim  Keun?Hyung?Lee  Myung?Seob?Khil  Yo?Seung?Ho  Hak?Yong?KimEmail author 《Fibers and Polymers》2004,5(2):122-127

In this study, we evaluated the effect of the molecular weight of the polymer on electrospun poly(ethylene terephthalate) (PET) nonwovens, and their mechanical properties as a function of the linear velocity of drum surface. Polymer solutions and electrospun PET nonwovens were characterized by means of viscometer, tensiometer, scanning electron microscope (SEM), wide angle X-ray diffraction measurement (WAXD) and universal testing machine (UTM). By keeping the uniform solution viscosity, regardless of molecular weight differences, electrospun PET nonwovens with similar average diameter could be obtained. In addition, the mechanical properties of the electrospun PET nonwovens were strongly dependent on the linear velocity of drum surface. From the results of the WAXD scan, it was found that the polymer took on a particular molecular orientation when the linear velocity of drum surface was increased. The peaks became more definite and apparent, evolving from an amorphous pattern at 0 m/min to peaks and signifying the presence of crystallinity at 45 m/min.  相似文献   

Mineral composition of freshly harvested potatoes     

Ruth H. True  John M. Hogan  Jorg Augustin  S. J. Johnson  C. Teitzel  R. B. Toma  R. L. Shaw 《American Journal of Potato Research》1978,55(9):511-519

Nine Irish potato varieties from five growing locations were assessed for mineral content to determine the contribution of the potato toward meeting the U.S. recommended daily allowances for man. With the exception of calcium, the potato is a significant source of minerals for which U.S. recommended daily allowances have been established (iron, copper, iodine, magnesium, phosphorus, and zinc).  相似文献   

Increased nuclear NAD biosynthesis and SIRT1 activation prevent axonal degeneration     

Araki T  Sasaki Y  Milbrandt J 《Science (New York, N.Y.)》2004,305(5686):1010-1013

Axonal degeneration is an active program of self-destruction that is observed in many physiological and pathological settings. In Wallerian degeneration slow (wlds) mice, Wallerian degeneration in response to axonal injury is delayed because of a mutation that results in overexpression of a chimeric protein (Wlds) composed of the ubiquitin assembly protein Ufd2a and the nicotinamide adenine dinucleotide (NAD) biosynthetic enzyme Nmnat1. We demonstrate that increased Nmnat activity is responsible for the axon-sparing activity of the Wlds protein. Furthermore, we demonstrate that SIRT1, a mammalian ortholog of Sir2, is the downstream effector of increased Nmnat activity that leads to axonal protection. These findings suggest that novel therapeutic strategies directed at increasing the supply of NAD and/or Sir2 activation may be effective for treatment of diseases characterized by axonopathy and neurodegeneration.  相似文献   

First record of avian Plasmodium DNA from mosquitoes collected in the Yaeyama Archipelago, southwestern border of Japan     

Ejiri H  Sato Y  Kim KS  Tamashiro M  Tsuda Y  Toma T  Miyagi I  Murata K  Yukawa M 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2011,73(11):1521-1525

We studied the prevalence of avian Plasmodium in 509 mosquitoes of 9 species collected from the Ishigaki and Iriomote islands in the Yaeyama Archipelago, located southwest from the mainland of Japan. Two identical avian Plasmodium lineages were detected from Culex (Culiciomyia) nigropunctatus. Detected lineages were phylogenetically classified into different clade to avian Plasmodium lineages from birds and mosquitoes in the mainland of Japan but identical to a lineage detected from a resident bird, White-breasted Waterken (Amaurornis phoenicurus). This is the first detection of avian Plasmodium DNA from mosquitoes in the Yaeyama Archipelago and suggested that resident birds might have been infected with an avian Plasmodium lineage specific to the studied area and C. nigropunctatus could be the candidate vector mosquito species.  相似文献   

Estimation of stomatal ozone uptake of deciduous trees in East Asia     

Yasutomo Hoshika  Tomohiro Hajima  Yo Shimizu  Masayuki Takigawa  Kenji Omasa 《Annals of Forest Science》2011,68(3):607-616

• Background   

To assess ozone risks to temperate deciduous forest trees in East Asia, the stomatal ozone uptake was estimated based on a flux-based modeling approach.  相似文献