Abel Herter (4 results)

Paperback. Condition: New. Print on Demand. This book investigates the composition of thymus nucleic acid and its purin groups in order to gain a deeper understanding of the chemical and biological processes taking place in nucleic acid. Early nucleic acid research had long held that thymus nucleic acid contained the nitrogenous bases xanthine and hypoxanthine. However, the experiments in this book demonstrate that thymus nucleic acid does not contain these bases, but instead contains guanine and adenine, with guanine equaling the quantity of adenine. The author posits that the presence of xanthine and hypoxanthine in other studies is due to guanine conversion or the action of certain reagents on a guanine group, as well as the specific hydrolytic agent employed. This work builds upon previous research and contributes to our understanding of nucleic acid, an essential component in the biological processes of animals. This book is a reproduction of an important historical work, digitally reconstructed using state-of-the-art technology to preserve the original format. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in the book. print-on-demand item.

Paperback. Condition: New. Print on Demand. This book delves into the enigmatic nature of the superficial layer of cells and its significance in tissue permeability and how various dyes interact with them. Prior research has hinted at the importance of the solubility of dyes in various tissue elements. However, the author investigates the impact of acids or alkalis on the lipoid solubility of dyes. Their findings reveal that the lipoid solubility of an acid dye is increased by the addition of acid, while that of a basic dye is increased by the addition of alkali. This discovery challenges the prevailing notion that basic dyes are much more soluble in lipoids than acid dyes. The author's exploration extends to the practical applications of these findings, including experiments on fat cells in the omentum and red blood corpuscles, leading to a reassessment of the conventional wisdom on tissue staining. Ultimately, this book offers valuable insights into the complex relationship between the superficial cellular layer and its interactions with the surrounding environment. This book is a reproduction of an important historical work, digitally reconstructed using state-of-the-art technology to preserve the original format. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in the book. print-on-demand item.

Condition: BUONO USATO. INGLESE Vol.IV completo, rilegatura rigida, in mezza tela, piatti cartonati, con lievi segni di usura ai bordi ed alle punte, dorso con titoli d'oro, fioritura, leggermente sbiadita, con strappetto al piede e pieghe alla cima, pagine leggermente e naturalmente ingiallite e con sporadica fioritura, alcuna di esse ancora intonse, timbro di vecchia biblioteca regolarmente acquisita ai margini di alcune carte, tagli con molta fioritura e non rifilati. Numero pagine 510.

Condition: DISCRETO USATO. INGLESE Annata incompleta del periodico in lingua inglese "The journal of biological chemistry" volume V anno 1908 successivamente rilegato. Pagine fruibili anche se brunite dal tempo in particolare ai tagli e sporadicamente fiorite ai bordi esterni; bordi a barbe cotti e logorati non impedenti la fruibilità. Segno a biro al frontespizio. Coperta rigida in mezza tela con titoli oro al tassello in pelle del dorso ingiallita dal tempo presentante abrasioni ai margini e tracce di usura da sfregamento ai piatti. Il volume potrebbe contenere timbri ed etichette dell'Istituto Veneto, regolarmente acquisito dalla nostra libreria. Numero pagine 529.