MCPB-ethyl对富士苹果疏花效果的研究   总被引：3，自引：0，他引：3  

曹秋芬  孟玉平  横田清  王晋泽 《华北农学报》2004,19(2):100-103

探讨了MCPB-ethyl的喷布时期、喷布浓度对富士苹果的疏花效果、果实发育和果实品质的影响。试验证明,MCPB-ethyl是一个良好的苹果疏花剂,有效喷布期是中心花盛开后1～5d,最适喷布期是中心花盛开后1～3d;最适喷布浓度为15mol／L,对果实发育、果形、果实着色和果实品质无不利影响。  相似文献   

Molecular typing of Salmonella enterica serovar Enteritidis isolates from food-producing animals in Japan by multilocus variable-number tandem repeat analysis: evidence of clonal dissemination and replacement     

Ayumi Kobayashi  Sayaka Takahashi  Masaaki Ono  Kiyoshi Tanaka  Masato Kishima  Masato Akiba  Ikuo Uchida 《Acta veterinaria Scandinavica》2014,56(1):31

Background

Salmonella enterica serovar Enteritidis is a zoonotic pathogen. Human infections are associated with contaminated eggs and egg products. In Japan, since 1989, the incidence of food-borne disease caused by S. Enteritidis has increased and a pandemic has occurred; however, little is known about changes that occurred before and after this pandemic event in the dominant lineage of isolates from food-producing animals. This study aimed to determine the S. Enteritidis lineages in Japan over the last few decades by using multilocus variable-number tandem repeat analysis (MLVA).

Findings

MLVA was used to analyse 79 S. Enteritidis isolates collected from chickens (n = 63), cattle (n = 12), pigs (n = 2), and goats (n = 2) during 1975–2009. The S. Enteritidis isolates showed 14 different MLVA allele combinations, which were classified into two major clusters (A and C) and a minor cluster (B). All the 62 isolates in cluster A were isolated after 1988, whereas 13 of the 17 isolates belonging to cluster B and C were isolated before 1989.

Conclusions

The MLVA results showed that cluster C was predominant before 1989, and isolates in cluster A disseminated since 1989 and replaced the previous dominant clone, suggesting that isolates of cluster A originated from imported S. Enteritidis infection.  相似文献   

Prognostic Judgment at Post-Surgery by Biochemical Parameters in Beef Cattle with Left Displaced Abomasum     

Toshihiro ICHIJO  Hiroshi SATOH  Yuki YOSHIDA  Isao MURAYAMA  Kiyoshi TAGUCHI  Shigeru SATO 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2014,76(10):1419-1421

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Establishment and characterization of immortalized bovine endometrial epithelial cells     

Hanako Bai  Toshihiro Sakurai  Rulan Bai  Sachiko Yamakoshi  Etsunari Aoki  Mariko Kuse  Kiyoshi Okuda  Kazuhiko Imakawa 《Animal Science Journal》2014,85(8):799-804

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Regolith migration and sorting on asteroid Itokawa     

Miyamoto H  Yano H  Scheeres DJ  Abe S  Barnouin-Jha O  Cheng AF  Demura H  Gaskell RW  Hirata N  Ishiguro M  Michikami T  Nakamura AM  Nakamura R  Saito J  Sasaki S 《Science (New York, N.Y.)》2007,316(5827):1011-1014

High-resolution images of the surface of asteroid Itokawa from the Hayabusa mission reveal it to be covered with unconsolidated millimeter-sized and larger gravels. Locations and morphologic characteristics of this gravel indicate that Itokawa has experienced considerable vibrations, which have triggered global-scale granular processes in its dry, vacuum, microgravity environment. These processes likely include granular convection, landslide-like granular migrations, and particle sorting, resulting in the segregation of the fine gravels into areas of potential lows. Granular processes become major resurfacing processes because of Itokawa's small size, implying that they can occur on other small asteroids should those have regolith.  相似文献   

Neuroscience. Understanding intentions: through the looking glass     

Nakahara K  Miyashita Y 《Science (New York, N.Y.)》2005,308(5722):644-645

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Molecular cloud origin for the oxygen isotope heterogeneity in the solar system     

Yurimoto H  Kuramoto K 《Science (New York, N.Y.)》2004,305(5691):1763-1766

Meteorites and their components have anomalous oxygen isotopic compositions characterized by large variations in 18O/16O and 17O/16O ratios. On the basis of recent observations of star-forming regions and models of accreting protoplanetary disks, we suggest that these variations may originate in a parent molecular cloud by ultraviolet photodissociation processes. Materials with anomalous isotopic compositions were then transported into the solar nebula by icy dust grains during the collapse of the cloud. The icy dust grains drifted toward the Sun in the disk, and their subsequent evaporation resulted in the 17O- and 18O-enrichment of the inner disk gas.  相似文献   

利用内部信息的农用自动引导行走车的研究(第4报)——适应农业环境的控制系统     

于海业  马成林  并河清  村主胜彦 《农业工程学报》1997,13(4):35-39

研究的行走控制系统由软、硬两部分组成，通过建立系统的控制模型，开发了利用非线性理论进行线性变换的直线行走控制方法和利用预测控制进行曲线行走控制的方法，通过实验确定了控制系统的参数；改造设计了行走车的行走与操向部分。实现了计算机的行走控制。  相似文献   

Photic and circadian regulation of self-feeding activity in ayu     

Masafumi Amano  Masayuki Iigo  Kiyoshi Furukawa  Mitsuo Tabata  Kunio Yamamori 《Fisheries Science》2006,72(2):250-255

ABSTRACT:   The self-feeding rhythms of ayu Plecoglossus altivelis altivelis were examined. Individual ayu (mean body weight 40 g) were held in 60-L glass tanks equipped with self-feeders. Six of 14 fish learned self-feeding during the experiment. Under two different light–dark (LD) conditions (16 h:8 h and 8 h:16 h LD), self-feeding was synchronized to the LD cycle, and feeding occurred almost exclusively during the light phase. During exposure to constant light (LL), circadian feeding rhythms were observed. These results indicate self-feeding rhythms in ayu are restricted to the light phase under LD conditions and are controlled by the circadian clock under LL conditions.  相似文献   

alpha-Glucosidase inhibitory activity of some Sri Lanka plant extracts, one of which, Cassia auriculata, exerts a strong antihyperglycemic effect in rats comparable to the therapeutic drug acarbose     

Abesundara KJ  Matsui T  Matsumoto K 《Journal of agricultural and food chemistry》2004,52(9):2541-2545

Some Sri Lanka plant stuffs were examined regarding in vitro and in vivo alpha-glucosidase (AGH) inhibitory actions. According to the results, water extracts and methanol extracts of dried fruits of Nelli (Phylanthus embelica), methanol extracts of dried flowers of Ranawara (Cassia auriculata), and water extracts of latex of Gammalu (Pterocarpus marsupium) were found to have a potential AGH inhibitory activity. In particular, Ranawara methanol extract showed the strongest AGH inhibitory activity in vitro preferably on maltase giving an IC(50) value of 0.023 mg/mL and inhibited the maltase activity competitively. As a result of single oral administration of Ranawara (C. auriculata) methanol extract in Sprague-Dawley rats, a significant and potent lowering of blood glycemic response toward maltose ingestion was observed at 30 min after dosing of 5 mg/kg, thus, concurrently suppressed insulin activity. The ED(50) of the extract (4.9 mg/kg) clearly indicated that the antihyperglycemic effect was as potent as that of therapeutic drug, acarbose (ED(50) 3.1 mg/kg).  相似文献