Human Health

From the physical and social well-being of an individual to the functioning of an ecosystem, health has many different meanings and applications. More than just the absence of disease, health implies a state of well-being. Ever since the origin of life, physical, chemical and biological factors have impacted the health or biological status of living things. And in response life has evolved immune systems, detoxification systems and redundancies to stave off infection, disease, and toxicity. As the world becomes more interconnected, and industrialized, diseases never seen in one part of the globe now threaten to devastate human, wildlife and plant populations, while industrial chemicals now contaminate life in the most remote regions. Maintaining health, whether ecosystem, human or microbial arguably presents one of the greatest challenges of the day. 

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    Home canning is an excellent way to preserve garden produce and share it with family and friends, but it can be risky or even deadly if not done correctly and... More »

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    The energy requirement of species at each trophic level is a function of the number of organisms and their average mass. The study estimates global human biomass, its... More »

Recently Updated
Air quality in megacities Last Updated on 2014-09-18 16:40:27 Ambient air pollution in an increasingly urbanized world directly threatens the health of a large fraction of the world’s population. There is growing recognition that air-borne emissions from major urban and industrial areas influence both air quality and climate change on scales ranging from regional up to continental and global. Deteriorating urban air quality affects the viability of important natural and agricultural ecosystems in regions surrounding highly urbanized areas, and significantly influences regional atmospheric chemistry and global climate change. This challenge is particularly acute in the developing world where the rapid growth of megacities (cities having population equal to or more than 10 million) is producing atmospheric pollution of unprecedented severity and extent. For example, the deterioration of air quality is a problem that is directly experienced... More »
Fluorine Last Updated on 2014-09-13 19:14:38 Fluorine is a highly reactive chemical element with atomic symbol F. Having the atomic number nine, fluorine is the lightest halogen. Fluorine is a yellow-green gas which does not occur as a free, unreacted element in the natural environment. Under conditions of standard temperature and pressure, elemental fluorine forms a diatomic molecule with chemical formula F2. Chemically, fluorine is one of the strongest known oxidizing agents, and even more reactive and hazardous than chlorine. Its very high electron affinity causes fluorine to react directly with almost all other elements except for several of the Noble gases. Previous Element: Oxygen Next Element: Neon 9 F 18.998 Physical Properties Color colorless Phase at Room Temp. gas Density... More »
Fenugreek Last Updated on 2014-08-22 15:04:52 Fenugreek Seedlings (Source: Saikat Basu, own work) Scientific Classification Kingdom: Plantae Phylum:  Anthophyta Class:   Dicotyledoneae Order:   Fabales Family:  Fabaceae Genus:   Trigonella Species: Trigonella foenum-graecum Binomial name: Trigonella foenum-graecum L. Fenugreek (Trigonella) is the oldest medicinal plant in the world. Most popular species of this genus is Trigonella foenum-graecum, where the term “foenum-graecum” means ‘Greek hay’ pointing to its use as a forage crop in the past, fenugreek is grown mainly as a spice crop in the recent times. The plant is believed to be native to the Mediterranean region1-6. There are several controversies regarding the origin of the fenugreek plant for which no proper theory as to the... More »
Ricin Last Updated on 2014-06-30 13:49:34 The Director's Emergency Operations Center at the Centers for Disease Control and Prevention (CDC) has assembled basic information about the toxin ricin. You can find more detailed information on the CDC's Ricin Homepage. Ricin is a poison found naturally in castor beans. If castor beans are chewed and swallowed, the released ricin can cause injury. Ricin can be made from the waste material left over from processing castor beans. It can be in the form of a powder, a mist, or a pellet, or it can be dissolved in water or weak acid. It is a stable substance under normal conditions, but can be inactivated by heat above 80 degrees Centigrade (176 degrees Fahrenheit). Castor beans are processed throughout the world to make castor oil. Ricin is part of the waste “mash” produced when castor oil is made. Ricin has been used experimentally in medicine to... More »
Healthy Community Design Last Updated on 2014-06-29 19:10:40 The way we design and build our communities can affect our physical and mental health. Healthy community design integrates evidence-based health strategies into community planning, transportation, and land-use decisions. The U.S. Centers for Disease Control and Prevention notes that healthy community design can improve people’s health by: Increasing physical activity; Reducing injury; Increasing access to healthy food; Improving air and water quality; Minimizing the effects of climate change; Decreasing mental health stresses; Strengthening the social fabric of a community; and Providing fair access to livelihood, education, and resources. According to the World Health Organization, health is a state of complete physical, mental, and social well-being and not merely the absence of infirmity. A healthy community as described by the U.S. Department of Health and... More »