Xem 1-20 trên 27 kết quả Biological threats
  • Conserving biodiversity is a daunting and complex task. Perhaps no species presents a greater challenge than the giant panda – one of the most recognized and threatened animals on the planet. Its difficult-to-traverse, mountainous habitat in China makes quantifying population numbers in the wild exceedingly difficult. Despite a recent survey suggesting that the wild population may be growing, there is no disagreement that the primary threat is severely fragmented habitat.

    pdf612p mnemosyne75 02-02-2013 22 5   Download

  • Almost since their inception, the natural sciences, those fields that use the scientific method to study nature, have been divided into two branches: the biological sciences and the physical sciences. In part, this division can be viewed as a convenient social contrivance. However, over time it has also served more functional purposes. Physical scientists, when seeking the fundamental laws, have found it necessary to focus on the simplest of systems—elementary particles, atoms, and molecules—items clearly not alive.

    pdf123p camnhung_1 13-12-2012 21 4   Download

  • Since the early 1990s, the United States has been concerned about the diversion of expertise and sensitive information from the nuclear, biological, and chemical (NBC) weapons complexes of the former Soviet Union (FSU). This documented briefing offers an assessment of the threat of diversion from the FSU and examine

    pdf1p trinhosieupham 06-02-2013 21 3   Download

  • Chapter 56 - Conservation biology and restoration ecology. This chapter distinguish between conservation biology and restoration biology, list the three major threats to biodiversity and give an example of each, define and compare the small-population approach and the declining-population approach, distinguish between the total population size and the effective population size,...

    ppt114p tangtuy02 08-03-2016 3 1   Download

  • This chapter distinguish between conservation biology and restoration biology, list the three major threats to biodiversity and give an example of each, define and compare the small-population approach and the declining-population approach, distinguish between the total population size and the effective population size,...

    ppt77p tangtuy09 21-04-2016 6 1   Download

  • The international Cartagena Protocol on Biosafety deals primarily with the agricultural definition but many advocacy groups seek to expand it to include post-genetic threats: new molecules, artificial life forms, and even robots which may compete directly in the natural food chain.Biosafety in agriculture, chemistry, medicine, exobiology and beyond will likely require application of the precautionary principle, and a new definition focused on the biological nature of the threatened organism rather than the nature of the threat.

    ppt44p nguyen_vu 21-03-2010 96 16   Download

  • The use of industrially manufactured nitrogen (N) fertilizers increased rapidly in developed countries between 1960 and 1980. This facilitated a large increase in the production of feed and food grains (maize, wheat, and rice) per unit of cultivated land, but in some regions it also contributed to enrichment of surface and groundwater with various forms of nitrogen. Fertilizer, however, is not the only source of nitrogen that can cause contamination of surface waters.

    pdf0p tainhacmienphi 19-02-2013 19 7   Download

  • The Threat Analyzer is used for the analysis of the alerts detected by your McAfee® Network Security Platform [formerly McAfee® IntruShield® ] Sensors as well as those processed by an integrated Host Intrusion Prevention Server. The Threat Analyzer works in conjunction with the policies applied to your McAfee® Network Security Sensor and Host Intrusion Prevention Sensors. For more information on policies, see IPS Configuration Guide.

    pdf123p cao_can 02-01-2013 24 5   Download

  • The EU needs to protect its citizens and their rights from threats and challenges and further remove obstacles to circulation of citizens in Europe. This includes fighting crime and corruption, controlling our external borders and ensuring the respect of the rule of law and of fundamental rights, with the right balance between security and mobility. It also needs a well functioning and efficient justice system to support growth, entrepreneurship and attract investors.

    pdf0p lenh_hoi_xung 01-03-2013 25 5   Download

  • Nitrogen contamination may come from a variety of sources: municipal sewage, animal manure, atmospheric deposition, biological N fixation, soil organic N, and/or nitrogen fertilizers. The consequences of contamination in a specific water body will depend upon the amount of contamination from all sources and characteristics of the receiving waters. Shallow rivers, wetlands, lakes, and reservoirs, have some capacity to remove nitrogen by microbial denitrification.

    pdf12p tainhacmienphi 19-02-2013 18 3   Download

  • Malcolm Hill is an Assistant Professor of Biology at Fairfield University where he teaches General Biology and Evolution (both for majors). He also teaches an evolution course for non-majors. His research focuses on the evolutionary ecology of marine sponges. April Hill is an Assistant Professor of Biology at Fairfield University where she teaches Genetics and Developmental Biology. She is an active proponent of incorporating information technology in her lectures.

    pdf5p tainhacmienphi 19-02-2013 11 3   Download

  • Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành y học dành cho các bạn tham khảo đề tài: The bioscience revolution & the biological weapons threat: levers & interventions

    pdf5p panasonic03 16-12-2011 12 2   Download

  • The debate on climate change has shifted dramatically in recent years. There is now unequivocal scientifi c evidence – summarised in the 2007 report from the Intergovernmental Panel on Climate Change (IPCC) – that global warming is happening; that human actions are responsible; and that this poses an enormous threat to life on Earth. Politicians, businesses and the public are increasingly aware of the problem and are calling for urgent action to cut the man-made emissions of greenhouse gases (GHGs) that cause climate change, in particular carbon dioxide (CO2)....

    pdf171p yeutinh98 26-09-2012 25 2   Download

  • Many societies recognize the reproductive health threats facing young people—especially HIV infection and unwanted pregnancy—and see the schools as an appropriate venue for addressing such threats. They are, however, also concerned with upholding traditions and beliefs, including the expectation that young people abstain from sexual activity until marriage. Thus, traditional and religious leaders—who view themselves as the repository and transmitters of community values and beliefs—are often in the forefront of opposition to sexuality education in the schools.

    pdf5p chiecxedien 03-01-2013 24 2   Download

  • Our goal is to provide privacy and integrity to the data, to authenticate the sender, to prevent replay attacks and to prevent traffic analysis; consequently, the entire communication is encrypted (with one exception which will be explained). All communications consist of a preamble, header and payload. The format of all communications (sensor nodes and the base station) consist of a preamble, header and payload. The preamble is empty if the communication originates from the base station and is directed to a sensor, otherwise it contains the address of the sending node.

    pdf10p khongmuonnghe 04-01-2013 34 2   Download

  • Amer ic a faced a host of biological threats to health and security at the turn of the twenty-first century. Between 1990 and 2009, the United States contended with a foreign biological weapons program, bioterrorism, and a pandemic. Concerns about Saddam Hussein’s biological weapon caches sent the U.S. military scrambling to immunize troops against smallpox and anthrax. The 2001 anthrax attacks demonstrated that non-state actors could terrorize civilian populations with biological weapons as well.

    pdf315p thienbinh1311 13-12-2012 11 1   Download

  • It then outlines agriculture’s importance to the U.S. economy, assesses the vulnerabilities in the general food industry, examines the capabilities that are needed to exploit those vulnerabilities, and explores the likely outcomes from a successful attack. The report next considers the question of why terrorists have yet to employ agricultural assaults as a method of operation and concludes with proposed recommendations for the U.S. policymaking community.

    pdf0p xuan2013 29-01-2013 14 1   Download

  • Tuberculosis (TB) continues to be a major cause of morbidity and mortal-ity worldwide. The increasing emergence and spread of drug-resistant TB poses a significant threat to disease control and calls for the urgent devel-opment of new drugs. The tryptophan biosynthetic pathway plays an important role in the survival of Mycobacterium tuberculosis.

    pdf11p vinaphone15 27-02-2013 16 1   Download

  • This category of pests is widespread and affects every stage of poultry production to a greater or lesser extent. The house fly (Musca domestica) and other fly species with similar biology and habits can generally be managed with minimal use of pesticides where appropriate cultural and biological control practices are most effective (broiler breeders and layers). Manure management to reduce moisture reduces fly-breeding potential and enhances the effectiveness of naturally occurring fly parasites and predators.

    pdf18p loginnhanh 22-04-2013 14 1   Download

  • The soil ecosystem provides services such as carbon sequestration, nutrient cycling, water purification, provisioning of industrial and pharmaceutical goods, and a mitigating sink for chemical and biological agents. However, the soil is subject to various degradation processes. Its relation with the hydrosphere, biosphere, and atmosphere makes the interacting processes even more complex. Moreover, as the soilhuman interactions increase, threats, leading to a series of impacts on soil health, become more important....

    pdf406p cucdai_1 14-10-2012 41 16   Download

Đồng bộ tài khoản