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Production of Biopesticides01:18

Production of Biopesticides

Biopesticides offer a sustainable alternative to chemical pesticides, utilizing microbial agents to control agricultural pests. Bacillus thuringiensis (Bt) is a widely employed bacterium known for its potent insecticidal activity. Bt biopesticides are favored for their specificity to insect pests, minimal environmental impact, and natural degradability.Mechanism of Bt Toxin Action Bt produces insecticidal crystal (Cry) proteins during its sporulation phase. These proteins form parasporal...
Constant Volume Calorimetry02:41

Constant Volume Calorimetry

Calorimeters are useful to determine the heat released or absorbed by a chemical reaction. Coffee cup calorimeters are designed to operate at constant (atmospheric) pressure and are convenient to measure heat flow (or enthalpy change) accompanying processes that occur in solution at constant pressure. A different type of calorimeter that operates at constant volume, colloquially known as a bomb calorimeter, is used to measure the energy produced by reactions that yield large amounts of heat and...

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相关实验视频

Updated: May 20, 2026

Testing Protozoacidal Activity of Ligand-lytic Peptides Against Termite Gut Protozoa in vitro (Protozoa Culture) and in vivo (Microinjection into Termite Hindgut)
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爆炸性背包在老白工作者中的爆炸性背包.

J Šobotník1, T Bourguignon, R Hanus

  • 1Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, 166 10 Prague, Czech Republic.

Science (New York, N.Y.)
|July 28, 2012
PubMed
概括
此摘要是机器生成的。

虫工人表现出一种独特的自杀防御机制. 它们的身体破裂,释放有毒分泌物,阻止捕食者,随着它们的食能力下降,防御强度增加.

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Testing Protozoacidal Activity of Ligand-lytic Peptides Against Termite Gut Protozoa in vitro (Protozoa Culture) and in vivo (Microinjection into Termite Hindgut)

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Extracting DNA from the Gut Microbes of the Termite (Zootermopsis Angusticollis) and Visualizing Gut Microbes
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科学领域:

  • 动物学 动物学
  • 昆虫的行为昆虫的行为
  • 化学生态化学生态学

背景情况:

  • 社会昆虫的防御行为往往涉及到专门的个体.
  • 老龄化工人的资源分配转移可能会影响任务专业化.

研究的目的:

  • 为了研究Neocapritermes taracua工人的自杀防御机制.
  • 了解年龄,防御能力和任务绩效之间的关系.

主要方法:

  • 对白防御结构进行微观分析.
  • 对参与防御的分泌物进行化学分析.
  • 行为测试来评估防御有效性.

主要成果:

  • 塔拉库亚工人拥有两部分自杀装置,包括含铜的蛋白质晶体和唾液分泌物.
  • 在身体破裂时,这些成分反应形成毒液滴.
  • 随着工人年龄的增长,防御强度和自我毁灭倾向的增加,与食能力的下降相关.

结论:

  • 这项研究揭示了白中一种新的自杀防御策略.
  • 在这些社会昆虫中,寻找食物和防御之间的年龄相关的权衡是显而易见的.