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PubMed1999

Circadian rhythms: Something to cry about?

Recent studies suggest that a class of proteins known as cryptochromes have an evolutionarily conserved role in the entrainment of circadian rhythms to the night-day cycle. While the evidence reported is intriguing, the notion that cryptochromes have the same role in all species requires further investigation.

Animals↗
PubMed1999

Circadian clocks: A cry in the dark?

Cryptochrome proteins are key components of the circadian systems of both Drosophila and mammals. In Drosophila, they appear to be responsible for the entrainment of the circadian clock by the light-dark cycle, while in mammals they perform an important role in rhythm generation itself.

Animals↗
PubMed1999

Lipid and lipoprotein ratios as risk factors of atherosclerosis in patients with chronic renal insufficiency (CRI).

The serum levels of lipids, apolipoproteins and lipoprotein ratios in 19 healthy persons and 20 patients with uraemia not dialyzed were determined. Based on creatinine level the patients were divided into two groups: L (serum creatinine 2-5 mg/dl) and H (serum creatinine 5-10 mg/dl). Dyslipoproteinaemia in uraemic patients is already manifested in the early stages of the disease through its abnormal apolipoproteins rather than lipid profile and it suggests a high risk of atherosclerosis.

Adult↗
PubMed2001

Daily interpersonal experiences, context, and alcohol consumption: crying in your beer and toasting good times.

The authors explored a multidimensional view of drinking, whereby social and solitary drinking represent distinct behaviors associated with positive and negative experiences, respectively. Using daily diary methodology and multilevel analytic strategy, the authors examined, over 30 days, the within-person association of negative and positive experiences and alcohol consumption in different contexts and focused on interpersonal experiences. On days with more negative interpersonal experiences, participants engaged in more solitary drinking (i.e., drinking at home and alone), whereas on days with more positive interpersonal experiences they drank more in social contexts. The authors also demonstrated that individuals high on neuroticism drank more in solitary contexts on days with more negative interpersonal experiences, relative to those with lower neuroticism. These findings lend support to models linking daily drinking motivation and context-dependent drinking behavior.

Adaptation, Psychological↗
PubMed2002

Overview: For crying out loud--dangers and opportunities of communicating in the public domain.

Communication often extends into the public domain, inviting "eavesdropping" and other forms of exploitation by other species. Conflict is frequently the result, although interspecific communication can be mutually beneficial even when interests conflict fundamentally, such as between predator and prey. However, the most complex communication systems are likely to involve species with mutual rather than with conflicting interests. When interests do conflict, exploitation of the communication systems of others may impose high costs on signalers and select for signals that are less exploitable. Other costs of communication in the public domain arise from "mistakes" (e.g., mating with the wrong species) and select for more species-specific signal structure. The articles in this section illustrate the complexity of interspecific communication and yield important insights into the dynamic nature of communication systems.

Agonistic Behavior↗