Angiotensin is a peptide that can narrow down the blood vessels and lift up the blood pressure. Renin-angiotensin system is a group of peptides that act as receptors for drugs that take part in lowering the blood pressure. Angiotensin peptide also aids in secretion of aldosterone from the cortical region of the adrenal gland.
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If you’re not one of the lucky students back in high school who got the chance to dissect an owl pellet, then you don’t know what you missed out on. Sure, opening up something that an owl threw up may sound gross and repulsive to some, but it’s actually quite fun and not nearly as bad as it sound.
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Clostridium perfringens was another name given to C. welchii. This is a bacterium which belongs to gram-positive group. They are rod-shaped, form spores and are anaerobic. This bacterium lives in the places like decaying vegetation, sedimentation formed inside the waters, inside the intestinal tract of vertebrates, and in the soil. Clostridium perfringens sometimes acts as a pathogen for humans and sometimes, it will not cause harm even if ingested…
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A Review of the Book – “First Life” Designed to accompany the two-part television series, “David Attenborough’s First Life” covers the billions of years of time, leading up to the development of advanced forms of life on our planet. It is a chronological journal, split into eleven chapters that tells the story of the “slow burning fuse” that led to the explosion of life in the Cambrian, the development of the Phyla of organisms that are still with us today.
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This review examines the book “A Field Guide to Warblers of North America”, by Dunn and Garrett, part of the Peterson Field Guide series, commonly referred to as the “Peterson Warblers Guide”. This book is an advanced field guide, and will be most useful to advanced birders looking to master warbler identification, and may seem less useful or a bit overwhelming to beginners. However, it is also an outstanding reference on the topic of ecology and conservation issues relating to the warblers, and it is an invaluable resource to scientists or amateurs alike, looking to deepen their understanding of the warblers.
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The book Ornithology, by Frank B. Gill, is one of the most widely-used textbooks on the subject of ornithology. This critical book review gives an overview of my experience with this book, and what I think about the book’s writing style, appropriate audience, and content. I also examine the question of whether or not it is essential to buy the third edition of this book, or whether the older (1994) second edition would suffice. I argue that the third edition is essential.
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This book review of Ecology: The Ascendent Perspective by Robert Ulanowicz highlights both my personal story of reading this book, including how it influenced me as a thinker, and a more professional review of the book and discussion of which audience I think it would be most useful for. I discuss the book’s core ideas and underlying philosophy, and compare it to Ulanowicz’s other two groundbreaking books, published in 1986 and 2009.
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Rooibos is a plant used to produce South African Red Tea, a caffeine-free herbal tea with numerous positive effects on health. This article explores a little bit about the biology and ecology of the plant, including discussion of its production, region of origin, and the vulnerability of its production to climate change. The article also briefly discusses the health effects of this herb, and what is known of the biochemical underpinnings of these effects.
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Antioxidants are natural chemicals in biological systems that neutralize free radicals, thus stopping chain reactions that cause oxidative stress. Many antioxidants are able to be obtained from foods through the diet, and these chemicals include both essential nutrients like Vitamins A, C, and E, and other beneficial but non-essential compounds. This article gives an overview of what antioxidants are, how they work, and how to best benefit from including them in your diet.
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The flavor, aroma, and other qualities of a brewed cup of tea are influenced in profound ways by environmental factors in the area in which the tea is produced. These factors include large-scale factors such as weather and climate, but also include some peculiarities, such as insect predation. This article gives a brief overview of how these factors operate, and gives some amusing examples of particular types of teas and how their flavor is influenced by their environment during growth and production.
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