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We all think we suffer from stress, and, naturally, we all want to avoid it. But when we use the word stress, what do we mean? For many people, stress [...]

Discusses stress. Estimated annual economic toll of stress-related illnesses in the U.S.; Illnesses caused by stress; Function of the stress response. INSET: Allostasis Revealed.

Reports the technique in the use of red blood cells to deliver needed drugs directly to cells in the body. Delivery of steroids to the lungs of cystic fibrosis patients; Wide-range application of the technique; Release of steroid dexamethasone into the blood of patients.

Details the mechanism of replication in brome mosaic virus. Expression of replication genes in yeast cells; Potential of the mechanism in targeting virus through drugs; Suggestion of a common ancestor for all viruses.

The article discusses a study by Wolf Hanke and colleagues which found that whiskers supply information that may be used by the seal which fish are most worthwhile to hunt. Hanke enlisted the help of a harbor seal named Henry, a veteran research participant. The researchers used a technique called particle image velocimetry wherein a horizontal plane of water filled with reflective particles was illuminated with a laser, filmed, and digitally analyzed.

Focuses on the effect of depression and anxiety on the occurrence of atherosclerosis in the United States. Development of atherosclerosis; Impact of psychological factors on heart attack risks; Use of scanning technique electron-beam computed tomography; Connection between calcification and psychological characteristics.

Reports on a study showing that prions may infer an evolutionary advantage by allowing yeast cells to adapt quickly and radically when the environment changes. How prions that occur in yeast are not pathogenic, while those that occur in mammals are; Responsibility for heeding the so-called stop codon, a built-in part of the genetic code that halts the translation of DNA.

Identifies the earliest photosynthetic bacteria in the United States. Examination of genes of several bacterial groups; Use of the purple bacteria to study the fundamental mechanisms of photosynthesis; Evidence for the existence of anoxygenic photosynthetic bacteria before cyanobacteria.

Reports the observation on stem cells in livers of women receiving bone marrow transplants from male donors for treatment of leukemia at the New York University in New York, New York. Evidence of liver cells carrying Y chromosomes in transplanted livers; Bone marrow cells as source of the Y chromosomes; Implication for the treatment of liver diseases.

Reports the possibility of neurogenesis in the adult brain as discovered by neuroscientist, Jeffrey Macklis of the Harvard Medical School in Boston, Massachusetts. Capacity of the brain to respond to damage by self-repair; Significance of the findings for treatments of brain and spinal cord damage; Appearance of fresh neurons in a mature neurocortex.

Presents a research result regarding biological clocks of bees. Increase in the activity of a gene controlling biological clock upon employment of a bee in the daily nectar-gathering routine; Impact of socializing on the pace of biological clocks; Need for synchronization between biological clocks, daylight cycle and peak nectar-producing times of flowers.

Reports the discovery of the cancer gene CYLD. Manifestations of cylindromatosis; Possible use of the CYLD gene in the identification of pathways leading to cancer; Analysis of amino acid sequence in CYLD; Factors contributing to the mutation of cell into a tumor cell.

Identifies high levels of iron as the primary risk factor for a progressing stroke damage. Physiological effects of the cerebrovascular disease; Effect of the excess fluid buildup after brain injury on the production of destructive free radicals; Vulnerability of stroke patients with low ferritin levels to brain damage brought by stroke.

Reports the discovery of SOD1 gene mutation as an approach for treating amyotropic lateral sclerosis (ALS) in the United States. Narrative on the ALS of baseball player Lou Gehrig; Account on the activation of enzymes through mutation; Experimentation of SOD1 gene on mice; Significance of the study on medical pharmacology.

Reports on the creation of a hybrid virus that can be used in gene therapy. Ability of viruses to invade cells and incorporate DNA into it; Creation of a hybrid virus from adenoviruses and retroviruses.