Physiology of Photoreceptor Organs PDF Download

Author: M. G. F. Fuortes
Publisher:
ISBN:
Category : Photoreceptors
Languages : en
Pages : 786

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Author: Victoria Soroker
Publisher: John Wiley & Sons
ISBN: 1119057493
Category : Science
Languages : en
Pages : 364

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Book Description
Handbook of Major Palm Pests: Biology and Management contains the most comprehensive and up-to-date information on the red palm weevil and the palm borer moth, two newly emergent invasive palm pests which are adversely affecting palm trees around the world. It provides state-of-the-art scientific information on the ecology, biology, and management of palm pests from a global group of experts in the field. An essential compendium for anyone working with or studying palms, it is dedicated to the detection, eradication, and containment of these invasive species, which threaten the health and very existence of global palm crops.

Author: Hansjochem Autrum
Publisher:
ISBN:
Category : Invertebrates
Languages : en
Pages : 752

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Author: A.W. Snyder
Publisher: Springer Science & Business Media
ISBN: 3642809340
Category : Science
Languages : en
Pages : 523

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The above consideration indicates that at present many of the experi mental facts on PS in animals can be quantitatively explained within the limits of the "universal" photoreceptor membrane concept. Of course, existence of preferential orientation of the absorbing dipoles in the tubuli of the rhabdomeres can not be totally rejected. We hope that the concept of the "universal" photoreceptor membrane may serve as the useful instrument when dealing with newly discovered properties of visual cells so that true mechanisms of electrical and optical coupling will be searched for instead of assumptions being made on additional properties of the photoreceptor membrane in every new animal under study. 5. Absorption Spectrum of the Universal Photoreceptor Membrane and Spectral Sensitivity of the Photoreceptor 5. 1 Preliminary Notes It seems nearly self-evident that the absorption spectrum of the pho toreceptor membrane coincides exactly with that of the visual pigment it contains. Hence, the membrane must exhibit three bands of absorp tion - the principal band with its peak within the limits of visible spectrum (or a-peak); the secondary band between 340 and 380 nm (S peak); and the third, protein band, in the ultraviolet (UV) at 280 nm (COLLINS et al. , 1952). The main peak of absorption is located within the range 433-575 nm for retinol-based pigments and between 438 and 620 nm for 3-dehydroretinol-based pigments, the position of Amax de pending on many ecological factors.

Author: A. P. Gupta
Publisher: Van Nostrand Reinhold Company
ISBN:
Category : Science
Languages : en
Pages : 792

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Author: Nobumasa Yagi
Publisher:
ISBN:
Category : Compound eye
Languages : en
Pages : 336

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Author: Michael Locke
Publisher: Elsevier
ISBN: 0323141854
Category : Nature
Languages : en
Pages : 995

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Book Description
Insect Biology in the Future: ""VBW 80"" contains essays presented to Sir Vincent Wigglesworth during his 80th year. Wigglesworth is fairly designated as the founding father and remarkable leader of insect physiology. His papers and other works significantly contribute to this field of study. This book, dedicated to him, underlines the value of insect material in approaching a wide spectrum of biological issues. The essays in this book tackle the insects' physiology, including their evolution and dominance. The papers also discuss the various avenues of water loss and gain as interrelated components of overall water balance in land arthropods. This reference suggests possible areas for further research mainly at the whole animal level. It also describes the fat body, hemolymph, endocrine control of vitellogenin synthesis, reproduction, growth, hormones, chemistry, defense, and survival of insects. Other topics of importance include cell communication and pattern formation in insects; plant-insect interaction; and insecticides.

Author: William S. Furneaux
Publisher:
ISBN:
Category : Butterflies
Languages : en
Pages : 410

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Author: Farzana Khan Perveen
Publisher: BoD – Books on Demand
ISBN: 9535136593
Category : Science
Languages : en
Pages : 156

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Book Description
This book contains seven chapters divided into two sections. The first section is "Lepidoptera Systematics." It covers introduction classification and external and internal morphology. It also includes the importance and modern approaches of Lepidoptera collection curation and data management. It also describes molecular phylogeny and taxonomy of Lepidoptera for ecological and evolutionary studies. The second section, "Lepidoptera as a Model for Research," describes eyespot color pattern formation mechanism in the peacock pansy, Junonia almana (L.). The complete mitochondrial genome of the American potato tuberworm, Tecia solanivora (Povolny), is presented to study a mitogenome in insects. Lepidoptera are sensitive to physical and climatic changes. Therefore, their taxocenotic and biocenotic study was conducted in three environments, i.e., the grassland, forest, and ecotone of Rucamanque, a forest remnant.

Author: Xavier Belles
Publisher: Academic Press
ISBN: 0128130210
Category : Science
Languages : en
Pages : 303

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Book Description
Insect Metamorphosis: From Natural History to Regulation of Development and Evolution explores the origin of metamorphosis, how it evolved, and how it is it regulated. The book discusses insect metamorphosis as a key innovation in insect evolution. With most of the present biodiversity on Earth composed of metamorphosing insects—approximately 1 million species currently described, with another 10-30 million still waiting to be discovered, the book delves into misconceptions and past treatments. In addition, the topic of integrating insect metamorphosis into the theory of evolution by natural selection as noted by Darwin in his On the Origin of Species is also discussed. Users will find this to be a comprehensive and updated review on insect metamorphosis, covering biological, physiological and molecular facets, with an emphasis on evolutionary aspects. - Features updated knowledge from the past decade on the mechanisms of action of juvenile hormone, the main doorkeeper of insect metamorphosis - Aids researchers in entomology or developmental biology dealing with specialized aspects of metamorphosis - Provides applied entomologists with recently updated data, especially on regulation, to better face the problems of pest control and management - Gives general evolutionary biologists context on the process of metamorphosis in its larger scope