67 research outputs found
On the Peculiarity of Class Reproduction in the Society of Exchange and the Popular Subject of Rising Inequality in the United States
Capitalism as a mode of production and a form of social organization differs from all hitherto existing society in that it does not rely on the preservation of traditional hierarchies or on direct coercion to secure its reproduction. Capitalist society coheres on the basis of exchange which establishes a network of interdependent relations between individuals. Drawing on the work of Alfred Sohn-Rethel, this paper engages with the apparent paradox of how the reproduction of class society takes the form of spontaneous exchange transactions between autonomous individuals. The paper further argues that the conceptual basis of cognition is historically and socially conditioned and highlights the unique identity between the structure of exchange and the conceptual mode of thinking. Finally, the paper demonstrates how the hidden character of social domination and ‘the secret identity’ of commodity form and thought form serve to systematically obscure the true origins and nature of fundamental social problems. The case in point is the popular topic of rising inequality in the United States, a direct outcome of the reproduction of class relations, the underlying cause of which – the deepening division of intellectual and manual labor – is either conveniently ignored or, worse still, glorified
A retrospective analysis of glycol and toxic alcohol ingestion: utility of anion and osmolal gaps
<p>Abstract</p> <p>Background</p> <p>Patients ingesting ethylene glycol, isopropanol, methanol, and propylene glycol ('toxic alcohols') often present with non-specific signs and symptoms. Definitive diagnosis of toxic alcohols has traditionally been by gas chromatography (GC), a technique not commonly performed on-site in hospital clinical laboratories. The objectives of this retrospective study were: 1) to assess the diagnostic accuracy of the osmolal gap in screening for toxic alcohol ingestion and 2) to determine the common reasons other than toxic alcohol ingestion for elevated osmolal gaps.</p> <p>Methods</p> <p>Electronic medical records from an academic tertiary care medical center were searched to identify all patients in the time period from January 1, 1996 to September 1, 2010 who had serum/plasma ethanol, glucose, sodium, blood urea nitrogen, and osmolality measured simultaneously, and also all patients who had GC analysis for toxic alcohols. Detailed chart review was performed on all patients with osmolal gap of 9 or greater.</p> <p>Results</p> <p>In the study period, 20,669 patients had determination of serum/plasma ethanol and osmolal gap upon presentation to the hospitals. There were 341 patients with an osmolal gap greater than 14 (including correction for estimated contribution of ethanol) on initial presentation to the medical center. Seventy-seven patients tested positive by GC for one or more toxic alcohols; all had elevated anion gap or osmolal gap or both. Other than toxic alcohols, the most common causes for an elevated osmolal gap were recent heavy ethanol consumption with suspected alcoholic ketoacidosis, renal failure, shock, and recent administration of mannitol. Only 9 patients with osmolal gap greater than 50 and no patients with osmolal gap greater than 100 were found to be negative for toxic alcohols.</p> <p>Conclusions</p> <p>Our study concurs with other investigations that show that osmolal gap can be a useful diagnostic test in conjunction with clinical history and physical examination.</p
Snapshot of the Eukaryotic Gene Expression in Muskoxen Rumen—A Metatranscriptomic Approach
BACKGROUND: Herbivores rely on digestive tract lignocellulolytic microorganisms, including bacteria, fungi and protozoa, to derive energy and carbon from plant cell wall polysaccharides. Culture independent metagenomic studies have been used to reveal the genetic content of the bacterial species within gut microbiomes. However, the nature of the genes encoded by eukaryotic protozoa and fungi within these environments has not been explored using metagenomic or metatranscriptomic approaches. METHODOLOGY/PRINCIPAL FINDINGS: In this study, a metatranscriptomic approach was used to investigate the functional diversity of the eukaryotic microorganisms within the rumen of muskoxen (Ovibos moschatus), with a focus on plant cell wall degrading enzymes. Polyadenylated RNA (mRNA) was sequenced on the Illumina Genome Analyzer II system and 2.8 gigabases of sequences were obtained and 59129 contigs assembled. Plant cell wall degrading enzyme modules including glycoside hydrolases, carbohydrate esterases and polysaccharide lyases were identified from over 2500 contigs. These included a number of glycoside hydrolase family 6 (GH6), GH48 and swollenin modules, which have rarely been described in previous gut metagenomic studies. CONCLUSIONS/SIGNIFICANCE: The muskoxen rumen metatranscriptome demonstrates a much higher percentage of cellulase enzyme discovery and an 8.7x higher rate of total carbohydrate active enzyme discovery per gigabase of sequence than previous rumen metagenomes. This study provides a snapshot of eukaryotic gene expression in the muskoxen rumen, and identifies a number of candidate genes coding for potentially valuable lignocellulolytic enzymes
The Complete Genome Sequence of Fibrobacter succinogenes S85 Reveals a Cellulolytic and Metabolic Specialist
Fibrobacter succinogenes is an important member of the rumen
microbial community that converts plant biomass into nutrients usable by its
host. This bacterium, which is also one of only two cultivated species in its
phylum, is an efficient and prolific degrader of cellulose. Specifically, it has
a particularly high activity against crystalline cellulose that requires close
physical contact with this substrate. However, unlike other known cellulolytic
microbes, it does not degrade cellulose using a cellulosome or by producing high
extracellular titers of cellulase enzymes. To better understand the biology of
F. succinogenes, we sequenced the genome of the type strain
S85 to completion. A total of 3,085 open reading frames were predicted from its
3.84 Mbp genome. Analysis of sequences predicted to encode for
carbohydrate-degrading enzymes revealed an unusually high number of genes that
were classified into 49 different families of glycoside hydrolases, carbohydrate
binding modules (CBMs), carbohydrate esterases, and polysaccharide lyases. Of
the 31 identified cellulases, none contain CBMs in families 1, 2, and 3,
typically associated with crystalline cellulose degradation. Polysaccharide
hydrolysis and utilization assays showed that F. succinogenes
was able to hydrolyze a number of polysaccharides, but could only utilize the
hydrolytic products of cellulose. This suggests that F.
succinogenes uses its array of hemicellulose-degrading enzymes to
remove hemicelluloses to gain access to cellulose. This is reflected in its
genome, as F. succinogenes lacks many of the genes necessary to
transport and metabolize the hydrolytic products of non-cellulose
polysaccharides. The F. succinogenes genome reveals a bacterium
that specializes in cellulose as its sole energy source, and provides insight
into a novel strategy for cellulose degradation
Cellular adhesiveness and cellulolytic capacity in Anaerolineae revealed by omics-based genome interpretation
Promise of combined hydrothermal/chemical and mechanical refining for pretreatment of woody and herbaceous biomass
An Observational Method for Time Use Research: Lessons Learned from the Middletown Media Studies
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