Chronobiology: Unlocking the Mysteries of the Biological Clock | Book Publisher International

"Chronobiology: Unlocking the Mysteries of the Biological Clock" delves into the intricate workings of the biological clock, exploring its profound influence on various aspects of human physiology, behavior, and health. This comprehensive guide offers a multifaceted exploration of chronobiology, encompassing its historical roots, contemporary research findings, and practical applications. From elucidating the molecular mechanisms underlying circadian rhythms to examining the role of chronobiology in sleep disorders, mood regulation, and metabolic health, this book provides invaluable insights into the fundamental principles governing our internal timekeeping systems. Through a blend of scientific rigor and accessible language, readers will gain a deeper understanding of how our biological clocks shape our daily lives and impact overall well-being.

Author(s) Details:

Dr. Nayan K. Prasad,
Department of Zoology, RRM Campus, Tribhuvan University, Nepal.

Dr. Sanjeev Kumar,
Department of Zoology, B M College, Rahika, Lalit Narayan Mithila University, Darbhanga -846004, India.

Please see the link here: https://stm.bookpi.org/CUMBC/article/view/14293

Study on Heart rate Variability and Heart Rate under General Anesthesia in Rats of Both Sexes | Chapter 02 | Issues and Developments in Medicine and Medical Research Vol. 5

 The effects of general anaesthesia on autonomic function and baroreflex regulation are well documented. Intravenous anaesthetics can affect the activity of sympathetic or parasympathetic divisions of the autonomic nervous system (ANS) by having various qualitative and quantitative effects on the peripheral autonomic nervous system (ANS). There is currently a scarcity of information on sex differences in ANS activity or sex differences in ANS activities under anaesthesia.

The primary goal of this study was to see how spectral powers of heart rate variability (HRV) affected changes in heart rate (HR), total spectral power of HRV, and the low-frequency (LF)/high-frequency (HF) ratio in healthy, sexually mature rats of both sexes spontaneously breathing during the light (inactive) and dark (active) periods of their regimen day.

Experiments were carried out on male and female Wistar rats anaesthetized with zoletil (30 mg/kg [intraperitoneal]) after a four-week adaptation to a light-dark (LD) cycle (12h:12h). According to sex and light period, the mice were placed into four experimental groups (n=20 each). HR, HRV spectral powers (very low frequency, LF, and HF), and the LF/HF ratio were measured 20 minutes after anaesthesia was administered.

Conclusions and Results: In both sexes and during both light times of the regimen day, Zoletil had a tachycardic impact. The autonomic nervous system was engaged in HR changes in both light periods in females, while HR was not dependent on autonomic nervous system activity in males; as a result, the authors assume that it was primarily driven by other factors. HRV was determined in females by sympathetic and baroreflex activity during both light times, whereas HRV was determined in males by parasympathetic activity during both light phases. The effect of LF on the LF/HF ratio was substantial in females but not in males, whereas the effect of HF on the LF/HF ratio was minimal in both sexes and light periods.

Author(S) Details

P. Svorc
Department of Physiology, Medical Faculty Safarik’s University, Kosice, Slovak Republic and Department of Physiology and Pathophysiology, Medical Faculty Ostrava University, Ostrava, Czech Republic.

D. Petrasova
Laboratory of Research Bio-models, Medical Faculty Safarik’s University, Kosice, Slovak Republic.

P. Svorc Jr
Department of Physiology and Pathophysiology, Medical Faculty Ostrava University, Ostrava, Czech Republic.

View Book:- https://stm.bookpi.org/IDMMR-V5/article/view/5576

A Brief Review on Chronobiology and Chronotherapy of Hypertension | Chapter 5 | Challenges in Disease and Health Research Vol. 8

 Hypertension affects more than 90% of all patients with cardiovascular disease (CVD) in the United States, and it is a major risk factor for end-organ injury, CVD, and mortality. Chronobiology, chronopharmacology, and chronotherapy in the management of hypertension have only been studied for a few decades. According to research conducted in the previous decade, our behaviour, such as what we eat, and the time of day, have an impact on blood pressure (BP) and cardiovascular disease (CVD). Furthermore, the potential of the night: day ratio of systolic BP to predict the risk of cardiovascular events is more accurate than office BP calculated only once. The evidence clearly reveals that nocturnal blood pressure is the type of blood pressure that is most consistently connected with cardiovascular risk prediction and allows for more frequent safety monitoring. The circadian rhythm is crucial for blood pressure regulation. As a result, the use of chronopharmacotherapy is required for a circadian condition like hypertension. Different drugs, on the other hand, have been investigated for their chronopharmacology and possible chronotherapy. This page discusses the chronobiology of hypertension, as well as the chronopharmacology and chronotherapy of the many medicines used to treat it. Researchers are likely to produce more creative chronopharmaceutical formulations for the control or treatment of hypertension now that they are aware of the risk factors connected with this illness problem.

Author (s) Details

K. Latha
G.Pulla Reddy College of Pharmacy, Mehidipatnam, Hyderabad 500 028, India.

M. U. Uhumwangho
Department of Pharmaceutics and Pharmaceutical Technology, Faculty of Pharmacy, University of Benin, Nigeria.

S. A. Sunil
University College of Pharmaceutical Sciences, Andhra University, Visakhapatnam-530003, India.

M. V. Srikanth
University College of Pharmaceutical Sciences, Andhra University, Visakhapatnam-530003, India.

K. V. Ramana Murthy
University College of Pharmaceutical Sciences, Andhra University, Visakhapatnam-530003, India.

View Book :- https://stm.bookpi.org/CDHR-V8/article/view/1423