Coloration of ultra high molecular weight polyethylene fibers using alkyl-substituted anthraquinoid blue dyes     

Taekyeong Kim  Seonhee Jeon  Dongsup Kwak  Yuri Chae 《Fibers and Polymers》2012,13(2):212-216

UHMWPE fibers were dyed with a series of anthrquinoid blue dyes having different length of alkyl substituents at general dyeing condition. The dyeability was investigated at various conditions and fastness of the dyeings was examined. As the length of alkyl substituents increased, the dyeability toward UHMWPE fibers tends to be improved gradually. Color strength of the fabrics was increased with the increase of dyeing temperature from 100 to 130 °C. From the dyeing rate, equilibrium dyeing at 130°C was achieved at 2–3 h. The tensile strength of UHMWPE fibers after dyeing at 130 °C for 1 h was maintained at a level of 95 % of untreated fiber. However, at prolonged dyeing time at 130 °C, the tensile strength was significantly decreased to a practically unacceptable level. The color fastnesses to washing, rubbing and light of the dyeings were very good showing higher than 4 ratings.  相似文献   

Diverse phytoplasmas associated with potato stolbur and other related potato diseases in Russia     

Natalia V. Girsova  Kristi D. Bottner-Parker  Damir Z. Bogoutdinov  Yuri I. Meshkov  Karina A. Mozhaeva  Tatyana B. Kastalyeva  Ing Ming Lee 《European journal of plant pathology / European Foundation for Plant Pathology》2016,145(1):139-153

  相似文献   

Identification of vitamin B12 and pseudovitamin B12 from various edible shellfish using liquid chromatography–electrospray ionization/tandem mass spectrometry     

Yuri Tanioka  Shigeo Takenaka  Tadasu Furusho  Yukinori Yabuta  Yoshihisa Nakano  Fumio Watanabe 《Fisheries Science》2014,80(5):1065-1071

In this study, the vitamin B₁₂ contents were analyzed in the edible portions of various shellfish (bivalves and snails). High vitamin B₁₂ contents (30.5–53.3 μg/100 g wet weight) were detected in mussels, surf clams, bloody clams, and freshwater clams. However, scallops and abalone had extremely low vitamin B₁₂ contents (0.1–1.1 μg/100 g wet weight) which was attributed to only the muscle portions being edible. These results suggest that high levels of vitamin B₁₂ are accumulated in the viscera of shellfish. Vitamin B₁₂ levels were also significantly higher in bivalves than in snails. The corrinoid compounds purified from all bivalves were identified as “true” vitamin B₁₂ using liquid chromatography–electrospray ionization/tandem mass spectrometry. In edible snails, abalone, and pond snails, however, both vitamin B₁₂ and pseudovitamin B₁₂ (an inactive corrinoid) were observed to be the major and minor corrinoid compounds, respectively. Based on these results, we conclude that the whole bodies of these edible bivalves are excellent sources of vitamin B₁₂ for humans.  相似文献   

Variation in Baiting Intensity Among CO2-Baited Traps Used to Collect Hematophagous Arthropods     

Yuri P. Springer  Jeffrey R. Taylor  Patrick D. Travers 《Journal of insect science (Online)》2015,15(1)

Hematophagous arthropods transmit the etiological agents of numerous diseases and as a result are frequently the targets of sampling to characterize vector and pathogen populations. Arguably, the most commonly used sampling approach involves traps baited with carbon dioxide. We report results of a laboratory study in which the performance of carbon dioxide-baited traps was evaluated using measures of baiting intensity, the amount of carbon dioxide released per unit time during trap deployment. We evaluated the effects of trap design, carbon dioxide source, and wind speed on baiting intensity and documented significant effects of these factors on the length of sampling (time to baiting intensity = 0), maximum baiting intensity, and variation in baiting intensity during experimental trials. Among the three dry ice-baited trap types evaluated, traps utilizing insulated beverage coolers as dry ice containers sampled for the longest period of time, had the lowest maximum but most consistent baiting intensity within trials and were least sensitive to effects of wind speed and dry ice form (block vs. pellet) on baiting intensity. Results of trials involving traps baited with carbon dioxide released from pressurized cylinders suggested that this trap type had performance comparable to dry ice-baited insulated cooler traps but at considerably higher cost.  相似文献   

Seed formation in triploid loquat (Eriobotrya japonica) through cross-hybridization with pollen of diploid cultivars     

Shinji Kikuchi  Miwako Iwasuna  Aya Kobori  Yasunori Tsutaki  Akihiro Yoshida  Yuri Murota  Eisho Nishino  Hidenori Sassa  Takato Koba 《Breeding Science》2014,64(2):176-182

As the fruits of loquat (Eriobotrya japonica, 2n = 2x = 34) carry large seeds, the breeding of seedless loquat has long been a goal. The recent creation of triploid cultivars (2n = 3x = 51) and the application of gibberellins allow commercial production of seedless loquat, but the possibility of seed formation in triploid loquats has not been carefully investigated. Through crossing experiments and cytological observations of meiosis and pollen tube growth, we found that the triploid line 3N-N28 was essentially self-sterile, but developed seeds on pollination with pollen from diploid cultivars at rates of up to 5.5%. Almost half of the seedlings survived to 5 months, and carried diploid (2n = 34), tetraploid (2n = 68), or aneuploid chromosome numbers. Our results suggest that triploid loquat cultivars might retain the risk of seed formation. Protection from pollination by diploid cultivars or the development of new triploid cultivars will be necessary to ensure the production of seedless loquat fruits.  相似文献   

Spontaneously occurring intracranial lipomatous hamartoma in a young BALB/c mouse and a literature review     

T Sasaki  K Yoshizawa  Y Kinoshita  H Miki  A Kimura  T Yuri  N Uehara  A Tsubura 《Journal of toxicologic pathology》2012,25(2):179-182

An intracranial lipomatous hamartoma was found in the third ventricle of a 7-week-old female BALB/cAnNCrlCrlj mouse. The nodule was composed of mature white adipose cells, which contained one large fat droplet, and there was no evidence of cytological atypia. The brain parenchyma at the retrosplenial granular cortex and the hippocampus in the cerebrum were slightly compressed, and the choroid plexus was dislocated downward. Scattered capillary vessels penetrated the nodule from the surrounding tissue. Based on these findings, the lesion was diagnosed as a lipomatous hamartoma that occurred from the roof of the third ventricle. This extremely rare tumor-like nodule represents an overgrowth of the mature adipocyte population as a malformation rather than a true neoplasm.  相似文献   

类似但成土因素不同的土壤：巴西始成土的趋同演变     

Alba L. A. SKORUPA  Sérgio H. G. SILVA  Giovana C. POGGERE  Diego TASSINARI  Leandro C. PINTO  Yuri L. ZINN  Nilton CURI 《土壤圈》2017,27(4):747-757

Soils result from the interaction of five independent formation factors.If one factor varies,while the others remain constant,different soils can be produced.Herein,we demonstrated an opposing trend,wherein two soils were similar,despite considerable differences in all factors of soil formation.We sampled two Inceptisols (Oxic Dystrudepts) formed on different parent materials (gneiss vs.mica schist),climate (tropical altimontane vs.warmer,drier plateau),topography (1 650 m,45％ slope vs.1000 m,8％ slope),time (rejuvenated vs.old,stable surface),and vegetation (rainforest vs.Cerrado savanna).The two soils had similar chemical properties,whereas the soil on mica schist had finer particle size distribution,lower porosity,and lower saturated hydraulic conductivity.These properties were related to a coarser blocky microstructure compared to the soil on gneiss.Both soils presented active mineral weathering and pronounced pedoplasmation,demonstrated by clay contents ＞ 300 g kg-1,although only the Dystrudept on gneiss possessed coarse rock fragments.The C horizons of both soils presented fragmented clay coatings suggestive of argilluviation,likely relict,because they were not observed in the B horizons.The similarities in many properties of the two Dystrudepts,despite contrasting factors of soil formation,suggest converging evolution and that soil classification at the subgroup level was efficient in grouping similar formative processes in tropical conditions.Moreover,this work revealed that similar pedogenic processes acting on different factors of soil formation can result in similar soil properties,at least for Inceptisols where further soil development is hindered by topographic limitations.  相似文献   

俄罗斯生态保护构架——特别自然保护区域体系   总被引：2，自引：0，他引：2  

尤·依·彼尔谢涅夫  王凤昆 《野生动物》2007,28(1):39-41

俄罗斯特别自然保护区域包括国家级自然保护区、全国和地方性的国家自然禁猎区、国家公园、自然公园、自然遗迹地、植物园、树木公园、疗养院、医疗保健地等特别自然保护区域。本文介绍了俄罗斯不同级别的自然资源和生态环境保护体系——特别自然保护区域体系的历史、框架、现状及其有关管理制度的规定。  相似文献   

Interpreting habitat distribution models of an elusive species,the marbled murrelets: a response to Burger and Page     

Yuri Zharikov  David Lank  Falk Huettmann  Fred Cooke 《Landscape Ecology》2007,22(9):1283-1289

Burger and Page (this volume) evaluated our models of habitat preferences and breeding success of a threatened seabird, the marbled murrelet (Brachyramphus marmoratus), based on the largest available set of confirmed nest-sites found in coastal old-growth forest of the Pacific North-West. We believe our study documented novel and unexpected patterns of landscape-level distribution of marbled murrelets in both heavily logged and relatively intact old-growth landscapes and provided insights into how these patterns influence their reproduction, and, eventually, management. Considering the importance of the issue and to ensure appropriate and responsible use of the information we welcome discussion, detailed scrutiny and evaluation of our original results. Burger and Page claim to have identified flaws with model interpretation, data quality, statistical approaches, presentation and interpretation of our results that would invalidate our conclusions. We respond that most of their critique is irrelevant and/or misdirected with respect to our study and the interpretation of GIS data models, and that valid aspects of their claims do not critically affect our conclusions.  相似文献   

Transferase activity of GhCesA2 (putative cotton cellulose 4- β -glucosyltransferase) expressed in Pichia pastoris     

Yuri Ihara  Takumi Takeda  Fukumi Sakai  Takahisa Hayashi 《Journal of Wood Science》2002,48(5):425-428

GhCesA2 is a cotton (Gossypium hirsutum) homologue of the bacterial cellulose synthase gene that encodes cellulose 4--glucosyltransferase. The central catalytic region of GhCesA2 was expressed as a soluble protein in the methylotrophic yeastPichia pastoris. The molecular size of the recombinant protein was 100kDa, which decreased to 85 kDa after treatment with endoglycosidase H. The recombinant GhCesA2 catalyzed transfer of glucose from UDP-glucose into unknown products in the presence of an extract of cotton hypocotyls, but the products were not-1,4-glucan.  相似文献