If it [time travel] could be done, someone will eventually learn how. If that happens, history would be littered with tourists. They’d be everywhere. They’d be on the Santa Maria, they’d be at Appomattox with [cameras], and they’d be waiting outside the tomb, for God’s sake, on Easter morning.”45 The question the title of this section asks is an echo of the one the physicist Enrico Fermi (1901–1954) asked in the 1950s, about the possibility of interstellar space travel and of alien intelligent life in the universe—if such travel is possible and ‘they’ exist, then where are they? Why haven’t…
Author: Jones
The transmission of human diseases by mosquitoes, fleas, lice, and ticks is well documented, but what about cockroaches? According to a thorough analysis of public health hazards from all types of pests undertaken by the World Health Organization, rather than direct disease transmission, the established health risks of cockroach infestations appear to be mostly those of filth, food contamination, and allergic asthma. Get in touch with experts like #1 Pest Control & Bed Bug Extermination in Charlotte North Carolina, to learn more about the dangers of cockroach infestations. In 1943, it was discovered that certain people developed skin rashes as…
Bargaining power of buyers The increase in customer power and knowledge is perhaps the single biggest threat posed by electronic trading. The bargaining power of customers is greatly increased when they are using the Internet to evaluate products and compare prices. This is particularly true for standardized products for which offers from different suppliers can be readily compared through online intermediaries such as search engines and price comparison sites such as Elko or Price runner. For commodities, auctions on business-to-business exchanges can also have a similar effect of driving down price. Purchase of some products that have not traditionally been…
It has been known for years that psychrotrophic microorganisms are generally unable to grow much above 30–35◦C. Among the first to suggest reasons for this limitation of growth were Edwards and Rettger,14 who concluded that the maximum growth temperatures of bacteria may bear a definite relationship to the minimum temperatures of destruction of respiratory enzymes. Their conclusion has been borne out by results from a large number of investigators. It has been shown that many respiratory enzymes are inactivated at the temperatures of maximal growth of various psychrotrophic types (Table 16–8). Thus, the thermal sensitivity of certain enzymes of psychrotrophs…
As I’ve mentioned earlier, the colon is where the majority of bacteria in your gastrointestinal tract reside, giving the cells that line it two important functions: serving as a blockade against pathogens and bacteria that don’t belong in your circulation, while also allowing for the absorption of fluids and any remaining nutrients that haven’t been absorbed by the small intestine. This physical barrier forms part of the body’s innate immune system. The innate immune system plays a major role in mediating inflammation and autoimmunity. It helps keep the microbiome and our immune cells (our adaptive immune system) separate from each…
The concept of a Lifestyle involves the perspectives, behaviors, beliefs, and orientations of a person, group, or society. The word was introduced by Austrian psychiatrist Alfred Adler in his famous book, The Case of Miss R. with the interpretation of “the basic nature of human beings as established early on in their lives”. According to this school of thought, human beings are essentiallyocial beings who have the ability to form and enjoy relationships. According to the definition, a lifestyle is determined by a set of attitudes and actions that a person belonging to a certain society shares with other people.…
The goal of European waste-related legislation is to protect public health and the environment and, so far, it has had a significant impact. However, given the lack of precision of the definition of waste in the European Community Directive (European Council, 1993), each Member State makes a different interpretation of the definition of waste with regard to specific materials, resulting in trade barriers and the impact of this upon the recycling industry is not to be underestimated. Under the present European definition of waste, recoverable material is seen more as a potential pollutant than as a potential raw material (Bontoux…
Many articles reported on the effects of a wide variety of pollutant forms, including individual complex chemicals and metals to freshwater and seawater aquatic organisms. In a rapid bioassay, 96 cell culture plates for screening herbicides and other phytotoxins for selective toxicity toward cyanobacteria were developed. Oscillatoria cf. chalybea and Selenastrum capricornutum were chosen as representatives of cyanobacteria (Cyanophyta) and green algae (Chlorophyta), respectively (Schrader et al., 1997). A number of ectomycorrhizal fungi, from sites uncontaminated by toxic metals, were analyzed to determine their sensitivity to Cd2, Pb2, Zn2 and Sb3. Significant interspecific variation in sensitivity to Cd2and Zn2 was…
Fashion is a broad term that has a lot of different meaning for different people. For some it is the clothes you wear; for others it is the accessories you put on. It also means how your clothes fit and where they are worn. Fashion is a style of dress and individuality in a certain time and place, at a certain context and with a certain degree of social influence. The word, ‘fashion,’ can mean many things. It can mean dress styles or individual styles; it can refer to the designers who create those styles or it can simply mean…
The liver is the largest organ in the body and one of the most important for overall health. It is situated under the lower right rib cage. The liver is capable of complete self-renewal at a faster rate than the rest of the body. Given this ability to restore itself via good foods, rest, and herbs, the root meaning of its name, “live” or “life,” is very apt. The liver makes and releases into the body an amazing amount of useful substances and sustains us in a myriad of vital ways. It also stores vitamins, minerals, and sugars. Defi ciencies…