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1.
调查淮南地区储藏的40种中药材共400份,从中用清水漂浮法和塔氏电热集螨器分离法分离出粉螨27种,隶属6科16属,污染率达100％,其中两种以上粉螨（含两种）污染的中药材达14种,占35％。可见中药材粉螨污染严重。 相似文献
2.
粉尘螨和屋尘螨属于麦食螨科,它们不仅是储藏物螨类,而且是重要的医学螨类.粉尘螨和屋尘螨不仅危害各种储藏的粮食和其它储藏物品,也是居室的害螨. 相似文献
3.
中国的粉螨属原已查得有粗脚粉螨A．siro庐山粉螨A.lushanensis及静粉螨A．immobilis等十多种．近年来，作者在江西省新余市渝水区北岗乡芙蓉村的米糠中采集发现薄粉螨A．gracilis（Hughes．1957），经查对为中国一新记录种． 相似文献
4.
不同生态桃园昆虫群落多样性研究 总被引：1，自引：0，他引：1
本文对不同生态桃园昆虫群落及其多样性进行了研究。研究结果表明,桃园有昆虫60种（包括螨类）,隶属于10目（包括蜱螨目）,42科;主要类群为鞘翅目（Coleptera）、双翅目（Diptera）、同翅目（Homoptera）、鳞翅目（Lepidoptera）、膜翅目（Hymenoptera）、半翅目（Hemiptera）和蜱螨目（Acarina）。不同生态桃园昆虫群落科数、物种数、多样性指数、均匀性及优势度等均有不同的程度的变化。主要优势种为桃小绿叶蝉（Empoasca flavescerns Fabr．）、桃粉蚜（Hyalopterus amygdale Blanchard）和山楂叶螨（Tetranychus viennesis Zacher）。由群落的相异系数可知,桃园8月上旬与8月中旬的昆虫群落最为相似。 相似文献
5.
目的：对于氏纤恙螨在云南省部分地区的分布和宿主选择情况进行初步探讨。方法：结合云南省不同地理方位和地形,独特的气候与生态等特点,于2001年—2011年选取了23个县（市）进行野外调查,用鼠笼（夹）加食饵诱捕鼠类等小型哺乳动物（小兽）宿主。选择小兽的双侧耳廓和外耳道采集恙螨幼虫,用霍氏液常规封片后在显微镜下逐一鉴定螨种。统计于氏纤恙螨在不同地域、不同景观和不同宿主小兽体表的分布情况。计算于氏纤恙螨在不同宿主小兽体表的感染率（P）、平均多度（MA）和感染度（MI）,用聚块指数（m＊/m）测定其在宿主不同个体间的空间分布格局。结果：所调查的23个县（市）中,有9个县（市）采集到了于氏纤恙螨（共1 959只,占所有恙螨的1.81%）。88.77%的于氏纤恙螨采自山区地理景观（尤其是海拔较高地区）,只有11.23%的于氏纤恙螨采自坝区景观。宿主大类选择显示,采自啮齿目（鼠类）、攀鼩目（树鼩）和食肉目小兽体表的于氏纤恙螨分别为57.78%、42.16%和0.05%,其它目小兽体表没有采集到该螨。宿主种类选择显示,所捕获的5目12科34属67种小兽中,有20种小兽采集到了于氏纤恙螨,其中42.16%采自攀鼩目树鼩科树鼩属的树鼩,其感染率（26.52%）和感染度（13.54只螨/每兽）均比较高,其次是其他野栖小兽。聚块指数显示,于氏纤恙螨在大多数宿主小兽不同个体间的分布呈聚集分布格局。结论：云南省存在于氏纤恙螨,且数量较大。该螨主要分布在海拔较高的山区地带,可寄生多种小兽宿主,宿主特异性低,但主要倾向于寄生在树鼩等野栖小兽体表。 相似文献
6.
草间小黑蛛对柏小爪螨控制作用的研究 总被引：1，自引：0，他引：1
草间小黑蛛成蛛对柏小爪螨雌成螨的捕食功能反应属HollingII型.对柏小爪螨各螨态的控制能力从到大依次为:成螨>若螨>幼螨.草间小黑蛛对柏小爪螨的寻找效应(S)随猎物(Nt)和天敌密度的增加而降低.草间小黑蛛的饥饿程度、生境大小等因素均可引起功能反应参数的变化.草间小黑蛛成蛛喜食柏小爪螨的成螨和若螨,对幼螨的捕食能力较弱. 相似文献
7.
目的：探讨储藏物螨虫标本制作方法。方法：分别用70％乙醇和MA80液对储藏物螨虫保存,并对保存的螨虫进行玻片标本的制作,显微镜下观察螨虫在保存液和玻片标本中的形态。结果：浸在70％乙醇中螨虫,很快就沉入液底;浸在MA80液中螨虫大多浮在液体表面。螨虫8h,16h和24h在70％乙醇和MA80液形态改变数分别为0和0,45只（4．5％）和31只（3．1％）,533只（53．3％）和54只（5．4％）。两者相比,16h前螨虫形态改变数差异无显著性（△χ=2．68,P〉0．05）;16h到24h,70%乙醇中螨虫形态改变数量明显增加（△χ=553．25,P〈0．01）。24h内两种保存液螨虫形态改变数量差异有显著性（χ=548．38,P〈0．01）。用MA80液中螨虫制作的玻片标本的质量明显好于70％乙醇中保存的螨虫（χ=35．16,P〈0．01）。结论：两种标本制作方法各有优缺点,应根据情况,适当地选择保存液对储藏物螨虫进行保存。 相似文献
9.
《山西教育(综合版)》2001,(6)
20世纪 90年代中期 ,国际热带农业研究所的科学家在南美洲的亚马逊河的雨林中 ,找到一种长着 8条腿 ,浑身圆滚滚 ,像绿色橡皮糖一般不起眼的小螨虫 ,科学家称它为“食虫螨”。它们专门吸食其它螨虫的内脏。于是“食虫螨”被请进非洲大陆 ,专门对付绿螨虫 ,绿螨虫的嚣张气焰很快被控制住。现在 ,“食虫螨”的势力已扩大到非洲几十个国家 ,绿螨虫再也无法成灾了食虫螨的奇妙用途 相似文献
10.
本文对已发现的江西食用茵螨类的10科和与食用菌关系十分密切的粉螨总科14种的形态特征在系统研究的基础上,首次在江西提出了江西食用菌螨类分科和分种检索表。 相似文献
11.
We examined the causal role of decreased food intake in the body weight pattern observed after exposure to intermittent footshock. In Experiment 1, relative to controls, shocked animals decreased food intake and lost weight in the 24-h test. An unshocked group whose food intake was yoked to the shocked group (food-yoked group) for the poststress period revealed that food intake was a sufficient cause of the body weight loss. In Experiment 2, after the first 24 h, the shock group recovered food intake and body weight gain but did not compensate for the initial losses. Body weights of food-yoked animals again indicated that food intake was a sufficient cause of these effects. The lowered body weight of shocked animals at the end of testing was due to a transient hypoingestion and a failure to subsequently show a compensatory hyperingestion. Dess’s (1991) regulatory shift hypothesis is refined in the light of these findings. 相似文献
12.
杨莹 《开封教育学院学报》2011,31(3):6-12,36
食品贮存加工是中国饮食文化和中国科技发展的重要内容,宋代的食品贮存加工大体可分为保鲜贮存加工与干制贮存加工两大技术类型。宋代保鲜贮存的方法有：窖藏法、冷藏法、密封法、混放法、灰藏法等,保鲜贮存多应用于粮食与果蔬食品;而宋代食品的干制贮存,根据不同的方法与特色,可分为：干燥法、腌制法、糟制法和糖制法。宋人在腌制食品的过程中能够结合加热和日晒等方法,使腌制贮存效果达到最佳。 相似文献
13.
抗日战争时期,湖南人民不仅遭受了战争带来的祸患,而且遭遇了严重的自然灾害。为支持抗战,国民政府发动全省人民积极进行赈灾救灾,重建故土家园,采取了急赈、蠲缓、平粜、工赈、放贷、防疫、募捐及难民救济等赈灾措施。这一时期的赈灾,由于战争的影响和国民政府政策的制约,存在一定的弊端,但取得了一定的成效,客观上安抚了民心,鼓舞了士气,促进了抗战事业的发展。 相似文献
14.
Prathyusha Sanagavarapu 《Early Childhood Education Journal》2018,46(5):523-534
Despite the increasing attendance of children with food allergy in schools in Australia and globally, little is known about how affected families manage their children’s transition to school. This paper discusses the experiences and support needs of ten mothers during their child’s transition to school in Sydney, Australia, drawn from the thematic analysis of Photo Elicitation Interviews in homes. One of the significant findings of this study was that most mothers found their child’s transition to school both emotionally and practically challenging, even though their children previously attended a long day care or preschool setting. While the school’s pro-active transitional planning, procedures of food allergy management and psychological support provided to families facilitated a smooth start to school, a lack of these, together with poor or no communication and non-involvement of families in the management of children’s food allergy hindered it. Correspondingly, mothers highlighted the need for schools to keep children’s food allergy at the forefront of their transitional planning and support them holistically by pro-actively communicating, collaborating and involving families in the discussions about food allergy, empowering them with information on the school’s policies and procedures, and acknowledging their concerns of safety. Mothers considered these things to be essential. Additionally, mothers provided advice to other parents on how to achieve a positive start to school. The implications of this study’s findings for schools and families are discussed. Considering the small sample size and generalisability of the findings to other contexts and countries, further research is recommended both nationally and internationally. 相似文献
15.
浅析微博时代高校网络舆情的监测与引导 总被引：2，自引：0，他引：2
随着时代与技术的不断发展,一种全新的网络信息分享与社交服务平台——"微博"应运而生,并逐渐渗透到高校校园生活的各个方面。微博在高校网络舆情出现的过程中发挥着什么样的作用?高校管理者和大学生应该以什么样的态度对待这一新鲜事物?对于这些问题的解答,有助于高校管理工作水平的提升,实现校方与学生在信息交流方面的双赢。文章分析了微博在信息传播方面的特点,为微博时代下高校网络舆情的监测与引导提供了一些依据。 相似文献
16.
Clark’s nutcrackers use spatial memory to recover stored food in the field and have performed very well in laboratory tests of spatial memory. During the present experiment, two groups of nutcrackers cached seeds every 4 days. Following each cache session, the stay group was tested with seeds in their caches; the shift group found seeds in novel sites. The stay group performed accurately throughout the experiment, but the shift group gave no indication of being able to learn to avoid sites where they had stored seeds. These results suggest that although nutcrackers can learn to shift away from remembered locations during some memory experiments, they cannot learn to shift away from cache sites. This raises interesting questions about the relationship between task characteristics, response strategies, and memory. 相似文献
17.
Pecking at the food key was recorded for 4 pigeons given restricted access to food. The access period was set at a fixed time in a light-dark cycle, continuous dark, or continuous light. The pecking activity occurred a few hours before onset of the access period in all three conditions. When the bird was again given free access to food after being released from restricted access, its pecking rhythm free-ran in the continuous dark. The initial phase of the rhythm coincided with the onset of the food-anticipatory pecking in the previous condition. These results suggest that the bird anticipated food access, based on its biological clock mechanism. When the access period was set in the dark phase of the light-dark cycle, anticipatory pecking did not occur, although pecking actually occurred during the access period. The pigeon’s activity is reduced during the dark phase of the light-dark cycle. Therefore, the bird’s activity level was probably too low to shape the anticipatory response, even if the access period was stored in memory in the biological clock. 相似文献
18.
李瑞 《兰州教育学院学报》2012,28(3):1-2,13
《说文解字》＂涼＂训＂薄也。＂＂薄＂的本义为＂林薄＂,引申有＂少＂义。＂涼＂的本义为＂薄酒＂,与＂林薄＂义相通。在系统考察＂涼＂和＂薄＂的本义、引申义的基础上,文章认为《左传》＂作法于涼＂应当解释为＂制定少取于民的法令＂,故将＂涼＂字释为＂不厚道＂不妥。 相似文献
19.
In two experiments with rat subjects, we examined the effects of a retention interval on performance in two conditioning paradigms in which a conditioned stimulus (CS) was associated with different unconditioned stimuli (USs) in successive phases of the experiment- Experiment 1 was designed to examine aversive-appetitive transfer, in which the CS is associated with shock and then food; Experiment 2 was designed to examine appetitive-aversive transfer, in which the CS is associated with food and then shock. Aversive and appetitive conditioned responses (freezing and head-jerk responding, respectively) were scored from videotape. In both experiments, a 28-day retention interval following the end of Phase 2 caused a recovery of the Phase 1 response and a resuppression of the Phase 2 response. The results suggest that the original association is not destroyed when the CS is associated with a new US in Phase 2. They also suggest that both retroactive and proactive interference effects may result-from interference with performance output rather than a disruption or loss of what is learned during or stored from the target phase. 相似文献
20.
清代台湾米谷运销福建前后延续近一个半世纪，主要有“官运”和“民运”两大系统，“官运”可分为兵眷米谷的调运与平粜米谷的买运；“民运”有商船贩运和走私内运。据估计，清代台湾每年向福建输出的米谷大约为100万石左右，不仅极大地缓解了福建的缺粮问题，同时也促进了清代台湾的开发，推动两岸商贸的发展，这一事件对今天两岸社会经济发展仍具有重要的启迪意义。 相似文献