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Preventive Healthcare Services01:30

Preventive Healthcare Services

Preventive healthcare services keep people healthy via frequent check-ups, screening, and counseling. They primarily aid in disease prevention rather than treating an acute or chronic illness. Preventive treatment also keeps individuals productive and energetic, allowing them to work well into their retirement years. Examples of preventive care services include:
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Binge Eating Disorders

Binge eating disorder is a significant mental health condition characterized by recurrent episodes of excessive food consumption within a short period, accompanied by a perceived loss of control over eating behavior. Unlike occasional overeating, binge eating disorder is marked by distressing emotions such as guilt, shame, and anxiety following binge episodes. The disorder affects individuals across different ages and backgrounds, with profound implications for physical and psychological...
Sources of Food Contamination01:29

Sources of Food Contamination

Contamination of food by microbial agents and natural toxins poses significant risks to public health. These hazards can be introduced at various points across the food supply chain, ranging from environmental sources to processing and storage stages. Understanding these contamination pathways is critical for developing strategies to ensure food safety.Seafood is particularly vulnerable to contamination through both environmental exposure and microbial colonization. Toxins from harmful algal...
Principles of Food Preservation01:27

Principles of Food Preservation

Food spoilage results from microbial growth, enzymatic activity, and environmental factors that gradually degrade the sensory, nutritional, and safety qualities of food. Preservation techniques aim to slow or halt these processes to extend shelf life and maintain product quality.A key concept in food microbiology is the microbial growth curve, which includes four phases: lag, exponential (log), stationary, and death. During the lag phase, bacteria adjust to their environment without significant...
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Hazard Analysis and Critical Control Points (HACCP)

Hazard Analysis and Critical Control Points (HACCP) is a science-based, preventive system used globally to ensure food safety by identifying, evaluating, and controlling biological, chemical, and physical hazards throughout food production. Originally developed by NASA and the Pillsbury Company for astronaut food, HACCP is now a core component of the Codex Alimentarius.HACCP operates on prerequisite programs—such as Good Manufacturing Practices (GMPs), sanitation procedures, and supplier...
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Investigation of Disease Outbreaks

Multistate foodborne outbreaks pose significant public health risks and require meticulous investigation to identify sources and implement control measures. The Centers for Disease Control and Prevention (CDC) utilizes a dynamic seven-step process for these investigations, integrating data from laboratories, interviews, and environmental assessments to protect public health.Outbreak Detection: The detection of multistate outbreaks typically begins with PulseNet, the CDC's national laboratory...

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Updated: Jul 9, 2026

A Procedure to Study the Effect of Prolonged Food Restriction on Heroin Seeking in Abstinent Rats
10:35

A Procedure to Study the Effect of Prolonged Food Restriction on Heroin Seeking in Abstinent Rats

Published on: November 11, 2013

饥荒:原因,预防和救济

J W Mellor, S Gavian

    Science (New York, N.Y.)
    |January 30, 1987
    PubMed
    概括

    饥荒是由于粮食产量下降造成的,通常由经济因素和政府政策加剧. 解决资源短缺问题和促进发展对于预防饥荒至关重要,特别是在非洲.

    科学领域:

    • 农业科学 农业科学
    • 发展经济学 发展经济学
    • 公共政策 公共政策

    背景情况:

    • 饥荒是由于恶劣天气或冲突而导致粮食生产多年下降的结果.
    • 价格波动,失业和资产枯竭等经济因素加剧了饥荒状况,导致死亡率增加.
    • 政府政策在决定饥荒的严重程度和蔓延方面发挥着至关重要的作用.

    研究的目的:

    • 分析饥荒的原因和促成因素.
    • 评估政府政策在减轻饥荒方面的有效性.
    • 确定关键的挑战和潜在的解决方案,以减少饥荒的脆弱性,特别是在非洲.

    主要方法:

    • 对历史饥荒事件的定性分析.
    • 在不同地区 (印度,孟加拉国,非洲) 的饥荒结果的比较研究.
    • 审查影响粮食安全的社会经济和政治因素.

    主要成果:

    • 印度和孟加拉国在控制饥荒方面取得了成功.
    • 非洲持续的饥荒挑战与民间骚乱和资源限制 (人员,机构,基础设施) 有关.
    • 政府政策是防止普遍饥荒的一个重要决定因素.

    结论:

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    • 一般的经济发展和政治共识对于减少非洲对饥荒的脆弱性至关重要.
    • 有针对性的外国援助可以大大有助于减轻饥荒.
    • 解决资源稀缺和不稳定的根本问题是长期粮食安全的关键.