What constitutes a network in the acinar cells of amphibian and mammalian pancreas?

Résumé Il a été montré que l'appareil réticulaire classique de Golgi dans les cellules pancréatiques des amphibies et des mammifères est un produit artificiel. Un certain nombre de raisons sont proposées pour expliquer ce fait.     

The mental wealth of nations

Countries must learn how to capitalize on their citizens' cognitive resources if they are to prosper, both economically and socially. Early interventions will be key.     

Identification of a receptor for protein import into chloroplasts and its localization to envelope contact zones

An anti-idiotypic antibody approach was used to identify an integral membrane protein of the chloroplast envelope as a receptor for protein import into the chloroplast stroma. The import receptor is found in contact sites between the outer and inner membrane of the chloroplast envelope.     

Effect of feeding zinc-deficient Bengal gram (Cicer arietenum) diet to rats on the in vitro absorption of L-histidine monohydrochloride

Summary The in vitro absorption of L-histidine monohydrochloride from the duodenum was less in a group of rats fed a zinc-deficient bengal gram diet than in a group fed a zinc-supplemented bengal gram diet.     

Comparison of the production rates of bacteria in the rumen estimated by using labelled live and formaldehyde treated mixed bacterial cells

Summary The bacteria production rates in the rumen have been estimated by injecting¹⁴C- and³⁵S-labelled mixed rumen bacteria, either live or killed by treatment with formaldehyde, into the rumen and applying isotope dilution technique. The rate of bacteria production when estimated by using either live- or dead-(protected-)labelled bacterial cells were comparable.     

What constitutes ‘apparato reticolare interno’ of Golgi in the goblet cells of vertebrate intestine?

Résumé L'auteur montre que l'appareil réticulaire classique de Golgi dans les cellules caliciformes intestinales des Vertébrés est un produit artificiel. Diverses raisons sont alléguées pour expliquer ce fait.     

Studies on the survival time of the eupyrene and oligopyrene spermatozoa of the prosobranch,Vivipara bengalensis (Lamarck)

Summary Vivipara bengalensis, like many other gastropods, produces two types of spermatozoa viz., eupyrene (normal) and oligopyrene (abnormal). The eupyrene ones are comparatively small and uniflagellated, whereas the oligopyrene ones are much larger, worm-like and each with a tuft of tail flagella. Eupyrene and oligopyrene spermatozoa reveal in vitro differential survival characteristics; the eupyrene spermatozoa exhibit considerably shorter survival as compared with their oligopyrene counterparts.     

A common CFH haplotype, with deletion of CFHR1 and CFHR3, is associated with lower risk of age-related macular degeneration

Age-related macular degeneration (AMD; OMIM #603075) is the most frequent cause of visual impairment in the elderly population, with severe disease affecting nearly 10% of individuals of European descent over the age of 75 years. It is a complex disease in which genetic and environmental factors contribute to susceptibility. Complement factor H (CFH) has recently been identified as a major AMD susceptibility gene, and the Y402H polymorphism has been proposed as the likely causative factor. We genotyped polymorphisms spanning the cluster of CFH and five CFH-related genes on chromosome 1q23 in 173 individuals with severe neovascular AMD and 170 elderly controls with no signs of AMD. Detailed analysis showed a common haplotype associated with decreased risk of AMD that was present on 20% of chromosomes of controls and 8% of chromosomes of individuals with AMD. We found that this haplotype carried a deletion of CFHR1 and CFHR3, and the proteins encoded by these genes were absent in serum of homozygotes. The protective effect of the deletion haplotype cannot be attributed to linkage disequilibrium with Y402H and was replicated in an independent sample.     

Possibility of using131I-albumin as a marker for the estimations of microbial protein synthesis rates in the rumen

Summary Total microbial protein synthesis rates in the rumen of buffaloes were estimated by isotope dilution technique, using¹³¹I-albumin treated with tannic acid as a marker. The animals were fed groundnut cake treated with formaldehyde to meet 50% of their digestible crude protein (DCP) requirement and 2.5% urea molasses mixture was given to meet the remaining requirement of DCP. Wheat straw was fed as the basal roughage. The total average microbial protein synthesis was 58.14 g/day.