A Case of Intussusception and Volvulus Occurring at Intervals in the Same Patient; With Operations and Recovery

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A study of local and non-local spatial densities in quantum field theory

We use a one-dimensional model system to compare the predictions of two different 'yardsticks' to compute the position of a particle from its quantum field theoretical state. Based on the first yardstick (defined by the Newton-Wigner position operator), the spatial density can be arbitrarily narrow and its time-evolution is superluminal for short time intervals. Furthermore, two spatially distant particles might be able to interact with each other outside the light cone, which is manifested by an asymmetric spreading of the spatial density. The second yardstick (defined by the quantum field operator) does not permit localized states and the time evolution is subluminal.Comment: 29 pages, 3 figure

APPLICATION OF PYROLYSIS-GC/MS TO THE STUDY OF BIOMASS AND BIOMASS CONSTITUENTS

Fast pyrolysis, the rapid thermal decomposition of organic material in the absence of oxygen, is a process that can be used to convert biomass into liquid fuels and chemicals. When performed at the micro-scale, pyrolysis is useful for characterizing biomass structure, as well as determining the pyrolysis products that can be generated from specific biomass feedstocks. Indeed, microscale pyrolysis coupled with on-line analysis of the pyrolysis vapors by GC/MS, so-called pyrolysis-GC/MS (Py-GC/MS), is a technique that can be used to characterize the structure and composition of the various components of lignocellulosic and microalgal biomass based on their pyrolysate distributions. Pyrolysates produced also provide insight into the range of products that can be expected when biomass feedstocks are subjected to thermal decomposition processes. This dissertation focuses on the Py-GC/MS analysis of lignocellulosic biomass such as sorghum and Scenedesmus sp. microalgae, in addition to high-lignin feedstocks such as walnut shells, coconut shells, olive pits and peach pits. The differences in the pyrolysate distributions among these biomass types are correlated with differences in the structure and composition of the biopolymers, mainly cellulose, hemicellulose and lignin, present in the biomass. Py-GC/MS analysis of lignin extracted from endocarp feedstocks is also emphasized. In addition to biomass and extracted lignin, sinapyl (S) and coniferyl (G) alcohol have been analyzed by Py-GC/MS in order to understand the relationship between the corresponding pyrolysates and sinapyl/coniferyl ratios of lignin present in lignocellulosic biomass

Some Notes on Collecting Cerambycidae

The chief objective of this paper is the publishing of a preliminary list of the Cerambycidae known to occur in Henry County, but some mention of the habits and methods of collecting these attractive beetles may not come amiss

Planting and Care of Trees in South Dakota

In this circular, created by the Agriculture Extension Service at South Dakota State College, the information provided includes the topics of planting and caring for trees in South Dakota. This information is provided through the guidance of the Agriculture Department during the year 1936

Anything to Act Crazy: Cajun Women and Mardi Gras Disguise

As women play an increasingly prominent part in many Cajun Mardi Gras runs, they bring their own styles of roleplaying and masking to the celebration. A handful of creative women have taken the lead in commodifying the rural tradition, making and marketing Mardi Gras suits and masks on a large scale. This article looks at Cajun women\u27s disguises as a way of understanding their larger influence on the festival