Species concepts and biodiversity in Trichoderma and Hypocrea：from aggregate species to species clusters？   总被引：2，自引：0，他引：2  

Druzhinina I  Kubicek CP 《Journal of Zhejiang University. Science. B》2005,6(2):100-112

Trichoderma/Hypocrea is a genus of soil-borne or wood-decaying fungi containing members important to mankind as producers of industrial enzymes and biocontrol agents against plant pathogens, but also as opportunistic pathogens of immuno-compromised humans. Species identification, while essential in view of the  相似文献   

阿尔泰的花毡     

I.V.奥克佳布里斯卡亚  D.V.切列米辛  古力扎提 《伊犁师范学院学报》2006,(4):25-29

考证了游牧民族无纺布和毡子产生的历史,以俄罗斯阿尔泰共和国科什阿加奇区哈萨克居民为例,介绍阿尔泰花毡的制作工艺、类型和装饰主题,说明现代哈萨克族花毡制作和设计的独特性,是对上千年游牧文化发展的延续。  相似文献   

Does deafness lead to enhancement of visual spatial cognition in children? Negative evidence from deaf nonsigners     

Parasnis I  Samar V  Bettger J  Sathe K 《Journal of deaf studies and deaf education》1996,1(2):145-152

This study investigated whether deafness contributes to enhancement of visual spatial cognition independent of knowledge of a sign language. Congenitally deaf school children in India who were born to hearing parents and were not exposed to any sign language, and matched hearing controls, were given a test of digit span and five tests that measured visual spatial skills. The deaf group showed shorter digit span than the hearing group, consistent with previous studies. Deaf and hearing children did not differ in their performance on the visual spatial skills test, suggesting that deafness per se may not be a sufficient factor for enhancement of visual spatial cognition. Early exposure to a sign language and fluent sign skills may be the critical factors that lead to differential development of visual spatial skills in deaf people.  相似文献   

Electroless Co-Zn Surface-Modified Nickel Hydroxide as an Active Material for Pasted Nickel Electrodes     

宋全生  唐致远  郭鹤桐  CHAN S L I 《天津大学学报(英文版)》2004,10(1)

Rechargeablealkalinenickelbatteries (e.g.,Ni/Cd ,Ni/Fe,Ni/Zn,Ni/H2 andNi/MH)areusuallypos itivelimited ,sothatthecapacityandcyclelifeofthecellsaredeterminedmainlybytheperformancesofnickelelectrodes.Withtheirhighenergydensityandlowcostrelativetothatofconventionalsinterednickelelectrodes,pastednickelelectrodeshavenowbeenwidelyusedincommerciallyavailableNi/MHbatteries[1 ,2 ] .Asthedis charged stateactivematerialofthepastednickelelec trodes,thepropertyofsphericalnickelhydroxideisthekeytodeter…  相似文献   

The role of social support in well-being and coping with self-reported stressful events in adolescents   总被引：3，自引：0，他引：3  

Bal S  Crombez G  Van Oost P  Debourdeaudhuij I 《Child abuse & neglect》2003,27(12):1377-1395

OBJECTIVE: This study investigated the role that social support plays in well-being and in coping after a stressful event in a group of non-clinical adolescents. Furthermore, this study aimed at replicating the finding that adolescents who reported sexual abuse reported more symptoms and less adequate coping strategies than adolescents who reported another type of stressful event or no stressful episode. METHOD: Eight hundred and twenty adolescents between 12 and 18 years of age filled out questionnaires assessing social support (Social Support Questionnaire, Sarason, Shearin, Pierce, & Sarason, 1987), trauma-related symptoms (Trauma Symptom Checklist for Children, Briere, 1996), behavior problems (Youth Self-Report, Achenbach, 1991), and coping (How I Cope Under Pressure Scale, Ayers, Sandler, West, & Roosa, 1996). RESULTS: 42% of the adolescents reported a stressful experience, and 4.4% reported sexual abuse. Sexually abused adolescents reported more stress-related symptoms and used more avoidance and fewer support-seeking coping strategies than the other adolescents. The main-effect hypothesis of social support was sustained, but social support did not moderate the relation between a stressful event and coping. Yet, a trend was found suggesting that high support from the family was associated with less avoidance coping and more support-seeking in adolescents who reported a non-sexually abusive, stressful event. CONCLUSIONS: Our findings show that a highly perceived availability of social support is directly associated with fewer trauma-related symptoms, especially in adolescents who are non-sexually abused. For adolescents who reported a sexual or another type of stressful event, social support did not play a different role in coping.  相似文献   

College teachers' perceptions of English language characteristics that identify English language learning disabled deaf students     

Berent GP  Samar VJ  Parasnis I 《American annals of the deaf》2000,145(4):342-358

Deaf individuals typically experience English language difficulties at all levels of linguistic knowledge. Hearing individuals with English language learning disabilities (LD) can exhibit the same kinds of English language difficulties as deaf individuals. Although the existence of deaf individuals who also have LD has long been recognized, no definite criteria for identifying them exist, partly because of the confounding effects of deafness and LD on English language development. Despite the confound, previous surveys suggest that teachers believe atypical English-language behavior is a potential diagnostic marker for LD in deaf individuals. In the present study, a survey solicited the intuitions of experienced teachers and tutors of English to deaf college students regarding the degree of difficulty deaf students with and without LD might be expected to have in dealing with 30 specific English language phenomena. Spelling knowledge and a variety of English discourse, lexical syntactic, and morphological phenomena emerged as candidates for further study as potential markers of LD in the deaf population.  相似文献   

The redistribution of authority in national laboratories in Western Germany     

Deich I 《Minerva》1979,17(3):413-444

  相似文献   

一种与众不同的染色方法     

I．Holme 《技术创新》2004,(7):30-32

随着纤维、染料、助剂、染色工艺以及印染机械的更新，纺织染色世界不断发生变化，获得了特殊的颜色效果。其中的一些变化出现在特殊纺织品，如地毯上。而另外的变化出现在纺织原料的生产中，如机织物、针织物、服装、袜类等。  相似文献   

Antimutagenic potential of curcumin on chromosomal aberrations in Allium cepa   总被引：1，自引：0，他引：1  

Ragunathan I  Panneerselvam N 《Journal of Zhejiang University. Science. B》2007,8(7):470-475

Turmeric has long been used as a spice and food colouring agent in Asia. In the present investigation, the antimutagenic potential of curcumin was evaluated in Allium cepa root meristem cells. So far there is no report on the biological properties of curcumin in plant test systems. The root tip cells were treated with sodium azide at 200 and 300 μg/ml for 3 h and curcumin was given at 5, 10 and 20 μg/ml for 16 h, prior to sodium azide treatment. The tips were squashed after colchicine treatment and the cells were analyzed for chromosome aberration and mitotic index. Curcumin induces chromosomal aberration in Allium cepa root tip cells in an insignificant manner, when compared with untreated control. Sodium azide alone induces chromosomal aberrations significantly with increasing concentrations. The total number of aberrations was significantly reduced in root tip cells pretreated with curcumin. The study reveals that curcumin has antimutagenic potential against sodium azide induced chromosomal aberrations in Allium cepa root meristem cells. In addition, it showed mild cytotoxicity by reducing the percentage of mitotic index in all curcumin treated groups, but the mechanism of action remains unknown. The antimutagenic potential of curcumin is effective at 5 μg/ml in Allium cepa root meristem cells.  相似文献   

Language delays, reading delays, and learning difficulties: interactive elements requiring multidimensional programming   总被引：1，自引：0，他引：1  

Hay I  Elias G  Fielding-Barnsley R  Homel R  Freiberg K 《Journal of learning disabilities》2007,40(5):400-409

Researchers have hypothesized four levels of instructional dialogue and claimed that teachers can improve children's language development by incorporating these dialogue levels in their classrooms. It has also been hypothesized that enhancing children's early language development enhances children's later reading development. This quasi-experimental research study investigated both of these hypotheses using a collaborative service delivery model for Grade 1 children with language difficulties from a socially and economically disadvantaged urban community in Australia. Comparing the end-of-year reading achievement scores for the 57 children who received the language intervention with those of the 59 children in the comparison group, the findings from this research are supportive of both hypotheses. The interrelationships between learning difficulties, reading difficulties, and language difficulties are discussed along with children's development in vocabulary, use of memory strategies and verbal reasoning, and the need for multidimensional programming.  相似文献