I-4. Crustacean production

Production of Glucosamine Hydrochloride from Crustacean Shell

The use of chitin as raw material to obtain glucosamine hydrochloride at laboratory level was investigated. Chitin was extracted from shrimp shells by deproteinization, demineralization and depigmentation. Afterwards, glucosamine hydrochloride was produced in four main stages: (1) acid hydrolysis of chitin with 12 M hydrochloric acid using the reflux technique; (2) filtration of the solution to...

On the Excitation of Crustacean Muscle. I

Apol i poprotei n A 4 decreases neut rop h i I degranulation and superoxide production

Neutrophils participate in the acute phase response and are often associated with tissue injury in a number of inflammatory disorders. The acute phase response is accompanied by alterations in the metabolism of apolipoprotein A-I and high density lipoprotein (HDL). Structural considerations led to studies investigating the effect of purified HDL and apolipoprotein A-I on neutrophil degranulatio...

Esterases in Crustacean Nervous System. I. Electrophoretic Studies in Lobsters.

Biochemical and pharmacological studies have established that crustacean nervous system contains fairly large amounts of cholinesterase and acetylcholine or acetylcholine-like compounds (Nachmansohn and Rothenburg, '45; Schallek, '45; Augustinsson, '48; Walop, '50, '51; Walop and Boot, '50). The ability of lobster central ganglia to hydrolyze acetylcholine, and the effectiveness of extracts of ...

I-4: Sperm Preparation: Biomimetic Aspects

With the advent of human assisted reproduction in the year 1978 numerous techniques were developed to isolate spermatozoa capable to fertilize oocytes. While early methodologies only focused on the aim of isolating viable, motile spermatozoa, with further progress of assisted reproductive technology, particularly for ICSI, it rapidly became clear that these two parameters are insufficient for t...