共查询到20条相似文献,搜索用时 234 毫秒
1.
羊鼻蝇蚴病是由绵羊狂蝇幼虫寄生于羊鼻腔及其相通的腔窦内引起的一种慢性寄生虫病。 1999年 10— 11月份 ,在辽宁省朝阳市调查羊鼻蝇蚴的感染率为 90 %以上 ,通常采取敌敌畏熏治或服用灭虫丁等药物进行治疗 ,而忽略了羊鼻蝇在整个夏、秋季对羊采食和休息的骚扰以及羊鼻蝇蚴驱治前对羊的危害。我们用自拟羊鼻蝇驱避剂对羊鼻蝇蚴病的预防效果进行了观察。药物组成 驱避剂以润滑油为基质 ,含有 90 0g/kg 的敌百虫和高效氯氰菊酯 ,将其按一定比例混合后加上一些辅助药物混匀备用。使用方法 用毛刷蘸适量驱避剂涂在羊鼻孔上侧 ,使药物附在… 相似文献
2.
羊鼻蝇蛆病是由于羊鼻蝇幼虫寄生于羊鼻腔及其附近的腔窦而引起以慢性鼻炎为特征的侵袭病。据笔者等 1984— 1987年调查 ,赤峰地区绵羊感染率为 91.2 % ,强度 2 2 .6条 ;山羊感染率为 5 6 .5 % ,强度 11.5条。为了有效的防治本病 ,我们用碘硝酚、鼻蝇净、虫克星进行驱杀羊鼻蝇幼虫的比较试验。1 材料与方法1.1 药物 2 0 0 g/L碘硝酚注射液 :有效成份为C6H3I2 NO3 系沈阳市兽药厂生产 ;5 0 0g/L鼻蝇净注射液 :主要成分为敌百虫 ,系内蒙古赤峰兽药厂生产 ;虫克星片剂 :主要成分为阿维菌素 ,系北京农业大学新技术开发总公司生产。… 相似文献
3.
4.
5.
羊鼻蝇病在张掖地区分布广泛,危害严重。全区六个县的羊只平均感染率为40.5%,感染强度为1~132个。其中山丹县为65.7%,民乐县为85%,其他各县也不同程度地遭到侵袭,还有不少社队羊只感染率高达100%。据吉林省畜牧兽医研究所赵辉元教授的报告表明:羊患该病时,毛产量损失10~16.8%,肉减少15%以上。张掖地区约有539000多只羊患羊鼻蝇蛆病,若按此计算,每年仅毛、肉的经济损失即达200万元以上。为了给羊鼻蝇蛆病的防治提供流行病学有关的科学资料,研究易于推广的有效的驱杀方法,特进行了本调查及试验研究。 相似文献
6.
我地的泗源沟大队羊群,羊鼻蝇蚴病的感染率约为85%以上,在历年的死亡剖检中,并未见到寄生于支气管的病例。现将我们于1980年4月所见的一例报告如下: 病羊为5岁公羊,咳嗽半月多,流脓性鼻液,并带有血液,后不吃、不喝,喜卧。临床检查:体温41.5℃,心跳54次/分,呼吸113次/分,精神沉郁,喜卧地,站立时伸颈摇头,鼻端在地上磨擦,不断喷鼻,有连 相似文献
7.
8.
9.
10.
对感染驯鹿狂蝇幼虫驯鹿进行了剖检观察,证实狂蝇幼虫主要寄生于驯鹿鼻腔及咽喉黏膜,在当年的7月到翌年1月主要以一期幼虫为主,从翌年2~3月开始快速生长发育,在4~6月多为二、三期幼虫。从翌年5月开始,成熟的三期幼虫随驯鹿打喷嚏排出体外羽化为成蝇。通过对驯鹿狂蝇生活史的观察,表明在大兴安岭地区,驯鹿狂蝇三期幼虫在50%~70%的湿度、21.5℃的平均温度及21.5℃下的451.5~666.5℃总积温下,经21-31 d羽化为成蝇,羽化率为59.6%。成蝇出现于6-9月份,在7~8月份达高峰期。驯鹿狂蝇1年发生一个世代,在驯鹿体内的寄生生活长达9-10个月;雌性成蝇每次产胎蚴30-80条,一生共产800-1000条;雌蝇寿命比雄蝇长,约为1-3周。 相似文献
11.
对甘肃省张家川县绵羊蜱媒血液原虫病进行了流行病学调查。结果发现 ,绵羊体表寄生蜱类 5种 ,即青海血蜱 (Haemaphysalisqinghaiensis)、长角血蜱 (H .longicornis)、革蜱 (Dermacentorspp .)、草原革蜱 (D .nuttalli)和微小牛蜱 (Boophilusmicroplus) ,其中青海血蜱为传播媒介优势种。绵羊泰勒虫 (Theileriaovis)感染率为 6 2 .2 % ,无形体 (Anaplasmaovis)感染率为 16 .7% ,且有双重感染的病例。体表喷洒药物灭蜱试验表明 ,5 0mg/L倍特对蜱类的半数致死时间 (LT50 )为 4 .91h ,用药后 3d体表残留活蜱数为 3.4± 2 .2只 ,14d后再次染蜱数为 4 9.7± 12 .0只 ,羊只血液原虫病感染率由38.1%降至 8.8% (P <0 .0 1) ,红细胞染虫率由 11.6 %± 6 .9%降至 5 .4 %± 2 .1% (P >0 .0 1)。 相似文献
12.
13.
Layla Saleh 《The international spectator : a quarterly journal of the Istituto affari internazionali》2020,55(2):49-64
ABSTRACT Donald Trump’s presidency may have altered less in relations between the United States and the Gulf Cooperation Council than recent accounts suggest. Instead, power relations between the US and its Gulf allies have long been, and continue to be, asymmetrical. Dependency theory and postcolonial analysis illustrate the ways in which the US global hegemon exhibits hierarchy, exerting control over Gulf economic resources (oil) and extending its ‘security umbrella’ (e.g. weapons sales and bases) – all in highly unequal dynamics. A critical discourse analysis of American and Saudi speeches during the 2017 Riyadh summit further confirms this assessment. This raises questions about alliance-making and alliance-maintenance norms of promise-keeping and reciprocity. 相似文献
14.
《中国国际问题研究》2016,(6)
Structural contradictions exist in the relationship between Russia and the West. Since the end of the Cold War, Russia's strategic influence has been increasingly curtailed by the US-led West, an unequal situation it is trying to change with its gradual recovery and rise. 相似文献
15.
Clive Gabay 《Global Society》2008,22(2):197-216
This paper concerns itself with the values which make up what has been labelled “ethical cosmopolitanism”—that which entails a universal scope of ethical concern. Conceptions of this ethic have underpinned the development of a “global civil society” and associated humanitarian and activist campaigns. However, such cosmopolitan campaigns have illustrated the ways in which the dismissals of difference and importance of embeddedness have caused suffering to the supposed beneficiaries of such campaigns. This is because of the unrecognised power relations that exist between moral agents, which result in “unequal exchanges”, that is, the exchange of physical, material and mental resources from positions of unequal negotiating positions, driven by power differentials and hierarchy. A theory of the “equal exchange” is developed upon which to base alternative cosmopolitan practices. Such a theory is grounded in Anarchist thought, which, it is argued, provides the most stringent philosophical underpinning for such a cosmopolitan theory. 相似文献
16.
作为恐怖组织常用的一种行动模式,自杀性恐怖主义在历史上就长期存在,尤其是九一一事件的发生,更使得自杀性恐怖主义成为恐怖组织在恐怖袭击中惯用的一种手段。相比其他形式的恐怖袭击,自杀性恐怖主义具有简单、廉价、机动性强、引起的社会恐慌大以及造成的人员伤亡严重等特征。自杀性恐怖主义在世界多地都已经发生过,被各种类型的恐怖组织广泛使用,针对的对象多样化,并且具有相对固定的行动流程。目前学术界从个体、组织、社会、文化和环境等方面对于自杀性恐怖主义的产生原因进行了分析。从个体的角度来看,一个人是否愿意进行自杀性恐怖袭击,最为重要的是当事人的理性计算,即个人通过自杀性恐怖袭击获得的好处是否能为自己带来更大的个人收益、是否可以增进家庭的福利、是否可以增加所在共同体的利益。在未来的反恐与应对中,国际社会可以通过增强重要设备的科技含量、增加双方对话与谈判的可能性、加强公共外交的力度、增进各国间的相互合作等方式以应对自杀性恐怖主义威胁。 相似文献
17.
18.
琉球政府《关于尖阁列岛主权》的声明宣称:“《琉球三省并三十六岛之图》所依据的是中国的《中山传信录》,这种资料没有价值。”本文通过考证,认为《琉球三省并三十六岛之图》是《琉球国图》的临摹图,《琉球国图》是日本最早记载钓鱼岛的文献,琉球政府的声明不能成立;甲午战争之前,钓鱼岛并非日本政府所称的“无主地”,更不是琉球群岛的属地,而是台湾的附属岛屿,属于中国的领土。这不仅为中国文献所证明,也为日本和西方的文献所证明。钓鱼岛属于中国,已经是当时国际社会的共识。 相似文献
19.
The conditions under which negotiation or mediation are chosen in internationalconflict have been little studied. Previous research has tended tofocus on the motivations and rational calculations of the states involved.Scant attention has been given to examining the effect of the context onthis choice. In this article, we present a framework for studying the contextualconditions under which negotiation or mediation are likely to takeplace. Employing an original data set, we find that negotiation tends to beused when conflicts are relatively simple, of a low intensity, and when bothparties are relatively equal in power. Mediation, on the other hand, tends tobe used in disputes characterized by high complexity, high intensity, longduration, unequal and fractionated parties, and where the willingness ofthe parties to settle peacefully is in doubt. 相似文献
20.
David Patrick Houghton 《Terrorism and Political Violence》2013,25(2):259-279
Psychological approaches have long been utilized to try to understand the mindsets of terrorists, but much of this literature has drawn on Freudian-inspired psychoanalytic approaches derived from the field of what is sometimes known as abnormal psychology. Building upon recent work which has largely dismissed the value of this kind of approach, this article suggests that we ought to draw more actively than hitherto upon newer, cognitive-based approaches to the study of terrorism. Stressing the importance of analogical reasoning in normal human reasoning, this article seeks to explain the actions of the Iranian students who stormed the U.S. embassy in Tehran in November 1979. Cognitive images of “another 1953,” it is argued, played an especially decisive role in the hostage takers' decision-making processes. While analogical reasoning represents only one cognitive approach to decision-making, future research in the field of terrorist studies should utilize more up-to-date “mainstream” approaches to understanding the psychology of terrorist decision-making. 相似文献