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Bringing the environment down to earth.

The debate on business and the environment has typically been framed in simple yes-or-no terms: "Does it pay to be green?" But the environment, like other business issues, requires a more complex approach--one that demands more than such all-or-nothing thinking. Managers need to ask instead, "Under what circumstances do particular kinds of environmental investments deliver returns to shareholders?" This article presents five approaches that managers can take to identify those circumstances and integrate the environment into their business thinking. These approaches will enable companies with the right industry structure, competitive position, and managerial skills to reconcile their responsibility to shareholders with the pressure to be faithful stewards of the earth's resources. Some companies can distance themselves from competitors by differentiating their products and commanding higher prices for them. Others may be able to "manage" their competitors by imposing a set of private regulations or by helping to shape the rules written by government officials. Still others may be able to cut costs and help the environment simultaneously. Almost all can learn to improve their management of risk and thus reduce the outlays associated with accidents, lawsuits, and boycotts. And some companies may even be able to make systemic changes that will redefine competition in their markets. All five approaches can help managers bring the environment down to earth. And that means bringing the environment back into the fold of business problems and determining when it really pays to be green.

Conservation of Natural Resources↗

Fos protein expression and cocaine-seeking behavior in rats after exposure to a cocaine self-administration environment.

To examine neuronal activation associated with incentive motivation for cocaine, cocaine-seeking behavior (operant responding without cocaine reinforcement) and Fos expression were examined in rats exposed to saline and cocaine priming injections and/or a self-administration environment. Rats were first trained to self-administer cocaine or received yoked saline administration ("control"). They then received 21 daily exposures to either the self-administration environment ("extinction") or a different environment ("no extinction") without cocaine available. Extinction training, used to decrease incentive motivation for cocaine elicited by the self-administration environment, decreased cocaine-seeking behavior elicited by both the environment and the cocaine priming injection. Exposure to the self-administration environment enhanced Fos expression in the no extinction group relative to control and extinction groups in the anterior cingulate, basolateral amygdala, hippocampal CA1 region, dentate gyrus, nucleus accumbens shell and core, and central gray area, regardless of whether or not priming injections were given. The priming injections enhanced Fos expression in the ventral tegmental area, caudate putamen, substantia nigra pars reticulata, entorhinal cortex, central amygdala, lateral amygdala, arcuate nucleus, and central gray area, regardless of group. Thus, these changes likely reflect an unconditioned effect from either cocaine or injection stress. The priming injections also enhanced Fos expression in the anterior cingulate, but only in cocaine-experienced groups, suggesting that this enhancement reflects an experience-dependent motivational effect of the priming injections. The results suggest that different neural circuits may be involved in the incentive motivational effects of cocaine-paired environmental stimuli versus priming injections and that the anterior cingulate may be part of a common pathway for both.

Animals↗

The psychological and physiological effects of an intensive-care unit environment on healthy individuals.

OBJECTIVE: The ideal inpatient environment would be one in which patient stress and anxiety are alleviated, but current inpatient hospital settings often do not seem to take this fact into consideration. To date, the effects of the actual hospital environment itself on patients is poorly understood. The purpose of the present study was to investigate the types of psychological and physiological changes that people undergo in response to being placed in an inpatient setting. DESIGN AND SETTING: Ten healthy volunteers were admitted to an intensive-care unit (ICU) for 4 days and 3 nights. The psychological and physiological changes before and after admission were examined. A qualitative assessment was also performed. RESULTS: Most healthy individuals at times develop feelings of depression, which can be measured by the Profile of Mood States and the Zung Self-Rating Depression Scale (P < .05). In this study, participants' fatigue and confusion increased (P < .05) and vigor decreased (P < .01) as measured by the Profile of Mood States. There was also an increase in the General Health Questionnaire scores (P < .01). However, no significant physiological effects were apparent, as measured by peripheral lymphocyte counts, natural killer cells activity, and urinary 17-kerosteroid and 17-hydroxycorticosteroid levels. Subjects often engaged in introspection during hospitalization and often had a negative attitude towards the hospital environment. CONCLUSIONS: The findings of increased feelings of depression attributable solely to being in an ICU setting are inconsistent with the type of environment generally considered necessary to alleviate patient anxiety and tension in a critical-care-ward environment. The negative perception of this environment strongly suggests room for improvement. Efforts in this regard should focus on improving the five senses, particularly sight, sound, and taste within the ICU.

Critical Care↗

Petroleum biodegradation in marine environments.

Petroleum-based products are the major source of energy for industry and daily life. Petroleum is also the raw material for many chemical products such as plastics, paints, and cosmetics. The transport of petroleum across the world is frequent, and the amounts of petroleum stocks in developed countries are enormous. Consequently, the potential for oil spills is significant, and research on the fate of petroleum in a marine environment is important to evaluate the environmental threat of oil spills, and to develop biotechnology to cope with them. Crude oil is constituted from thousands of components which are separated into saturates, aromatics, resins and asphaltenes. Upon discharge into the sea, crude oil is subjected to weathering, the process caused by the combined effects of physical, chemical and biological modification. Saturates, especially those of smaller molecular weight, are readily biodegraded in marine environments. Aromatics with one, two or three aromatic rings are also efficiently biodegraded; however, those with four or more aromatic ring are quite resistant to biodegradation. The asphaltene and resin fractions contain higher molecular weight compounds whose chemical structures have not yet been resolved. The biodegradability of these compounds is not yet known. It is known that the concentrations of available nitrogen and phosphorus in seawater limit the growth and activities of hydrocarbon-degrading microorganisms in a marine environment. In other words, the addition of nitrogen and phosphorus fertilizers to an oil-contaminated marine environment can stimulate the biodegradation of spilled oil. This notion was confirmed in the large-scale operation for bioremediation after the oil spill from the Exxon Valdez in Alaska. Many microorganisms capable of degrading petroleum components have been isolated. However, few of them seem to be important for petroleum biodegradation in natural environments. One group of bacteria belonging to the genus Alcanivorax does become predominant in an oil-contaminated marine environment, especially when nitrogen and phosphorus fertilizers are added to stimulate the growth of endogenous microorganisms.

Biodegradation, Environmental↗

Cabin environment and perception of cabin air quality among commercial aircrew.

OBJECTIVE: Our objective was to study the perception of cabin air quality (CAQ) and cabin environment (CE) among commercial cabin crew, and to measure different aspects of CAQ on intercontinental flights. METHODS: A standardized questionnaire was mailed in February-March 1997 to all Stockholm-based aircrew on duty in a Scandinavian flight company (n = 1,857), and office workers from the same company (n = 218). The answers were compared with an external reference group for the questionnaire (MM 040 NA). During this time, smoking was allowed on intercontinental flights, but not on other shorter flights. Smoking was prohibited on all flights after 1 September 1997. The participation rate was 81% (n = 1,513) in the aircrew, and 77% (n = 168) in the office group. Air humidity, temperature, carbon dioxide (CO2) and respirable dust were measured during intercontinental flights, during both smoking and nonsmoking conditions. Statistical analysis was performed by multiple logistic regression analysis, keeping age, gender, smoking, current smoking, occupation, and perceived psychosocial work environment simultanously in the model. RESULTS: Air humidity was very low (mean 5%) during intercontinental flights. In most cases (97%) the CO2 concentration was below 1,000 ppm. The average concentration of respirable particles was 67 microg x m during smoking conditions, and 4 microg x m(-3) during non-smoking conditions. Complaints of draftiness, too high temperature, varying temperature, stuffy air, dry air, static electricity, noise, inadequate illumination, and dust were more common among aircrew as compared with office workers from the same company. Female crew had more complaints on too low temperature, dry air, and dust. Current smokers had less complaints on stuffy air and environmental tobacco smoke (ETS). Younger subjects and those with atopy (childhood eczema, allergy to tree or grass pollen, or furry animals) reported more complaints. Reports on work stress and lack of influence on working conditions were strongly related to perception of a poor cabin environment. Flight deck crew had more complaints about inadequate illumination and dust, but less complaints about other aspects of the cabin environment, as compared with flight attendants. Aircrew who had been on a flight the previous week, where smoking was allowed, had more complaints on dry air and ETS. CONCLUSION: Complaints about work environment seems to be more common among aircrew than office workers, particularly draft, stuffy air, dry air, static electricity, noise, inadequate illumination and dust. We could identify personal factors of importance, and certain conditions that could be improved, to achieve a better perception of the cabin environment. Important factors were work stress, lack of influence on the working conditions, and environmental tobacco smoke on some longer flights. The hygienic measurements in the cabin, performed only on intercontinental smoking flights, showed that air humidity is very low onboard, and tobacco-smoking onboard leads to significant pollution from respirable dust.

Adult↗

The safe use of equipment in the magnetic resonance environment.

The clinical literature and problem reporting databases include numerous reports of injuries--and a few deaths--in magnetic resonance (MR) centers. Many of these incidents occurred because ferromagnetic materials (that is, materials that can become strongly magnetized) were mistakenly brought into the MR environment. The most spectacular outcome of such an error is the projectile effect, in which an object becomes airborne and literally flies through the air, crashing into the magnet. (A patient death from an airborne oxygen canister was widely reported last July.) Other incidents can be attributed to the use of devices within the MR environment in a manner not in accordance with their restrictions or limitations. Such incidents continue to occur despite the widely known risks of the MR environment. As the amount of equipment used in this environment increases, and as more powerful MR systems grow in popularity, staff awareness of MR hazards becomes ever more vital. In this Guidance Article, we discuss the basic technology of MR systems (including a description of the different types of magnetic field), outline the hazards presented by various elements of the MR environment, provide ECRI's recommendations for using equipment safely in this environment, and present a starter list of equipment and devices that are marketed by their suppliers as MR compatible.

Artifacts↗

Interaction of gene effects with environments for malting quality of barley doubled haploids.

Barley doubled haploids covering a wide range of malting quality, along with their parental cultivars and F2, F3 hybrids, were investigated in six environments (three locations, two years) to study the genotype-environment (G x E) interaction structure and the influence of environments on additive, dominance and epistatic gene effects. Grain and malt characters, such as 1000-grain weight, percentage of plump kernels, malt extract yield, protein content, Kolbach index and malt fine-coarse difference (FCD), were measured. Main effects for genetic parameters were estimated and regression analysis was used to explain the interaction of gene effects with environments. The results show that additive effects had the greatest interaction with environments for all the analysed traits, but only for malt characters this interaction was linear. Interaction of dominance effects was much lower and only in the case of 1000-grain weight, protein content and Kolbach index it proved to be significant. The results suggest that effects of heterozygous loci are more stable in contrasting environments than effects of homozygous loci.

Genotype↗

Comparison of a simulated versus work environment lifting task on L5/S1 compression forces.

Since a patient's ability to perform simulated work activities guides return-to-work decisions, a significant question to address is whether the simulated work environment accurately reflects the actual work environment. Work hardening programs have been used extensively as a method of rehabilitating workers to return to their pre-injury functioning levels. Re-training workers to lift boxes is a common method used to simulate the work environment. Although very few boxes used in the real work environment have handles, boxes with handles are often used in the simulated work environment. The difference in compression forces at the L5/S1 joint while lifting boxes with and without handles was investigated. The Lift Trak Motion Analysis system was used to estimate lumbar isometric compression forces exerted while lifting a 20-pound (9.07-kg) box. The results indicated that estimates of compression forces when lifting a box without handles were significantly different (p < 0.01) than when lifting the same box with handles. Based on these results, it is recommended that work hardening professionals carefully re-evaluate the simulated work environments currently being used for treatment.

Adolescent↗

[Pathological changes of cat brain tissues after cranial gunshot wound in hot and humid environment].

OBJECTIVE: To investigate pathological changes in cat brain tissues after gunshot wound in the head in hot and humid environments. METHODS: Sixteen cats were randomly divided into 4 groups, namely the normal environment (group 1), gunshot in normal environment (group 2), hot and humid environment (group 3), and gunshot wound in hot and humid environment (group 4) groups. Pathological changes of the cat brain tissues were observed with both optical and electron microscopes. RESULTS: The early-stage changes in group 2 were high-lighted by vasomotor dysfunction, with the coexistence of both vascular spasm and dilation. In group 3, vascular spasm was depressed while hemorrhagic changes increased. On the brain tissue sections in group 4 for optical microscopic observation and ultra-thin sections for electron microscopic examination, the number of viable neural cells was obviously reduced, and edema, degeneration of the organelle occurred; loosening of the capillary tight junction, rupture and bleeding of the blood vessels, as well as degeneration and loosening of the myelin sheath were observed by transmission and scanning electron microscopes, and such changes were more serious than those in group 2. CONCLUSION: The hot and humid environment can significantly affect the pathological changes in the brain tissues of cat with cranial gunshot wound.

Animals↗

Occupational health problems in modern work environment.

UNLABELLED: Analysis of occupational health problems in Lithuania and their relation to factors of modern work environment is presented. The article analyses the health of transport workers, airlines pilots and stewards, video display terminal workers and its relation to work environment. OBJECTIVE: To investigate and evaluate influence of changing occupational environment to workers' health. MATERIAL AND METHODS: Complex evaluation including several enterprises with different work profile and conditions. Evaluation of work environment, assessment of psychophysiological and ophthalmological data of workers as well as morbidity studies were performed. RESULTS: Occupational environment of transport workers is related with high levels of noise, vibration, mercury, carbon monoxide, welding aerosols, and dust. Main diseases for transport workers are upper respiratory tract and lung diseases, accidents, cardiovascular and musculoskeletal disorders. Cases of temporal morbidity for pilots and stewards are upper respiratory tract and lung diseases, accidents, intoxications and nervous system diseases. The main effects of video display terminal on operators' health are vision fatigue and musculoskeletal disorders. Ophthalmologic symptoms and vision fatigue are related to changes in eyes and central nervous system fatigue, as well as syndrome of "dry eyes". CONCLUSIONS: Changeable work environment is affecting employees' health with specific changes, which depend upon work character, experience and worker's age.

Accidents, Occupational↗

[Agricultural environment quality of China and its improving countermeasures].

This paper analyzed the present status of China agricultural water and soil environment. It was indicated that the agricultural water environment in this country was more serious, with the affected area being approximately 20% of the total farmland, and 5% of it being severely affected. More attention should be paid to the pollution of agricultural chemicals in soil environment. The impacts of industrial wastes, urban sewage and garbage, agricultural chemicals, and soil erosion on agro-environment were discussed, with the impact degree of these factors analyzed. The major problems in China agricultural environment melioration were presented, related researches and major countermeasures in this country and developed countries were reviewed, and relevant measures and suggestions on improving the agricultural environment quality of China were put forward.

Crops, Agricultural↗

Influence of carbonated drinking water on tibia strength of domestic cockerels reared in hot environments.

To determine the effects of heat stress and drinking water treatments on physical characteristics of skeletal tissue, tibias of cockerels ranging in age from 4 to 11 weeks were tested for breaking strength. Birds were subjected to either a thermoneutral environment (21 +/- 2 C) or a hot environment (37 +/- 2 C) and supplied with either tap or carbonated drinking water. Breaking strength of tibias was reduced in the hot environment; however, consumption of carbonated drinking water in the hot environment resulted in bone strength comparable with that associated with thermoneutral environment (both types of water). Also, bones from birds of the carbonated water-37 C treatment group had less phase breaks and tended to separate with a single break. Results indicate that hot environment and carbonated drinking water not only affect the previously reported morphologic and chemical characteristics of developing bone, but also their physical attributes.

Animals↗

[Urban environment and ultraviolet radiation].

Sanitary prognostication of the quality of urban environment covers a complex of problems, among which problems, associated with the charecter of the rational utilization of natural environment and ultraviolet microclimate regulation. Knowledge on this microclimate will help to elaborate criteria for assessment of environment, pledged in the biological effectiveness of the natural short-wave sun radiation reaching the earth surface a useful, but still poorly known environmental factor. After detailed acquaintance with the economical, physico-geographical and climatic characteristics of the big settlements in Bulgaria, 7 towns were chosen, representatives of the three basic economical regions in this country. A study was undertaken in these towns with compilation of physical characteristics of the natural ultraviolet irradiation, assessment of its biological activity and estimation of the degree of its losses in urban environment and evaluation of ultraviolet microclimate changes, in view of the possibilities to formulate an environment constituting a danger to health. The results may be helpful for a broad circle of specialists, occupied with environment protection problems and with the aspects of rational urban planning.

Bulgaria↗

Porter's generic strategies, discontinuous environments, and performance: a longitudinal study of changing strategies in the hospital industry.

OBJECTIVE: Changes in generic strategies in response to discontinuous environments have been relatively ignored in the management literature. This study reports an examination of the relationships between Porter's (1980) generic strategies, discontinuous environments, and performance. DATA SOURCES: Archival data for 1984 and 1988 were collected for 172 acute care hospitals in Florida in order to test these relationships. STUDY DESIGN: To examine fully the performance impact of changes in strategy in a discontinuous environment, a longitudinal research design that identified a firm's strategy at two points in time, 1984 and 1988, was used. PRINCIPAL FINDINGS: Results indicate that firms with a proper strategy environment fit performed the highest, firms that did not change their strategy had no change in performance, and firms that changed their strategy toward a proper strategy environment showed an increase in performance. CONCLUSION: Findings support the notion that hospitals with appropriate strategy-environment combinations will exhibit higher performance.

Analysis of Variance↗

The use of a direct current electromagnetic tracking device in a metallic environment.

The use of a relatively new direct current (DC) electromagnetic tracking device in conjunction with a hostile metal environment of Material Testing Machine was studied. In this research, we first evaluated the reliability and performance of the DC tracking system operating in an ideal metal-free environment for both the translational and rotational error in static and dynamic conditions. When the tracking system with the same factory default configuration was moved into a heavy metal environment, serious translational and rotational distortion were observed. Through a series of evaluation of the physical environment and modification of the settings, the tracking system could perform satisfactorily and both the translational and angular error could be reduced in manufacturer's specifications. The safe working region for the DC tracking systems operating in a material testing machine environment was successfully mapped out. This study provides information for using the DC electromagnetic tracing device in the heavy metal environment exists in the material testing machine.

Biomechanical Phenomena↗

Generation of development environments for the Arden Syntax.

Providing appropriate development environments for specialized languages requires a significant development and maintenance effort. Specialized environments are therefore expensive when compared to their general-language counterparts. The Arden Syntax for Medical Logic Modules (MLM) is a standardized language for representing medical knowledge. We have used PROTEGE-II, a knowledge-engineering environment, to generate a number of experimental development environments for the Arden Syntax. MEDAILLE is the resulting MLM editor, which provides a user-friendly environment that allows users to create and modify MLM definitions. Although MEDAILLE is a generated editor, it has similar functionality, while reducing the programming effort, as compared to other MLM editors developed using traditional programming techniques. We discuss how developers can use PROTEGE-II to generate development environments for other standardized languages and for general programming languages.

Programming Languages↗

Using the radial distributions of physical features to compare amino acid environments and align amino acid sequences.

We have performed a comprehensive analysis of the microenvironments surrounding the twenty amino acids. Our analysis includes comparison of amino acid environments with random control environments as well as with each of the other amino acid environments. We describe the amino acid environments with a set of 21 features summarizing atomic, chemical group, residue, and secondary structural features. The environments are divided into radial shells of 1 A thickness to represent the distance of the features from the amino acid C beta atoms. We make the results of our analysis available graphically over the world wide web. To illustrate the validity and utility of our analysis, we used the amino acid comparative profiles to construct a substitution matrix, the WAC matrix, based on a simple summary of the computed environmental differences. We compared our matrix to BLOSUM62 and PAM250 in BLAST searches with query sequences selected from 39 protein families found in the PROSITE database. Although BLOSUM62 was the most sensitive matrix overall, our matrix was more sensitive for some families, and exhibited overall performance similar to PAM250. Our results suggest that the radial distribution of biochemical and biophysical features is useful for comparing amino acid environments, and that similarity matrices based on the geometric distribution of features around amino acids may produce improved search sensitivity.

Amino Acid Sequence↗

Airborne contaminant exposure control in a partitioned work environment by exhaust ventilation systems.

The evaluation of contaminant removal effectiveness can play a key role in a working environment quality investigation and in remediation efforts. In this study a computer simulation technique was developed for assessing the efficiency of contaminant removal within a partitioned working environment. To determine the effect of the physical parameters of each partitioned space on contaminant removal effectiveness, a relative contaminant concentration unit was used to show the simulation results. In addition, tracer gas techniques were adopted to validate the accuracy of the prediction model. A comparison of measured CO2 concentrations in a controlled environment chamber with the results of a simulation model is presented. This study investigated the partition configuration of work environment and environment parameters including openings operation, constant concentration, and exhaust air volume mode. Results indicated that variations of the above three parameters can produce great differences in overall ventilation performance. Through this type of study, the interaction of airflow and contaminant concentration between partitioned spaces can be understood in advance and adequate knowledge can be provided to maintain a high-quality and healthy environment for workers.

Air Movements↗