Lightweight, low compression aircraft diesel engine

The feasibility of converting a spark ignition aircraft engine to the diesel cycle was investigated. Procedures necessary for converting a single cylinder GTS10-520 are described as well as a single cylinder diesel engine test program. The modification of the engine for the hot port cooling concept is discussed. A digital computer graphics simulation of a twin engine aircraft incorporating the diesel engine and Hot Fort concept is presented showing some potential gains in aircraft performance. Sample results of the computer program used in the simulation are included

Profile of a Successful Negotiation: The Crest Street Experience

How do you define "success" in a negotiated settlement? The following case study defines it as "Crest St"- a low income neighborhood moved out of the way of a highway in Durham, North Carolina. Although the parties didn't immediately concur with this appelation, their smiles belie their sense of pride in the outcome

An improved method for the solution cyclization of peptides under pseudo-high dilution conditions

Malesevic M, Strijowski U, Bachle D, Sewald N. An improved method for the solution cyclization of peptides under pseudo-high dilution conditions. Journal of Biotechnology. 2004;112(1-2):73-77.Depending on the ring size, the cyclization of peptides often is accompanied by dimerization or cyclodimerization. Hence, these macrocyclizations have to be performed under high dilution conditions. Efficient cyclization of peptides in solution with a minimum amount of solvent succeeds, when a dual syringe pump is used to simultaneously add the linear peptide precursor and a coupling reagent from two separate syringes. (C) 2004 Elsevier B.V. All rights reserved

Pre-Exercise Hyperhydration-Induced Bodyweight Gain Does Not Alter Prolonged Treadmill Running Time-Trial Performance in Warm Ambient Conditions

This study compared the effect of pre-exercise hyperhydration (PEH) and pre-exercise euhydration (PEE) upon treadmill running time-trial (TT) performance in the heat. Six highly trained runners or triathletes underwent two 18 km TT runs (~28 °C, 25%–30% RH) on a motorized treadmill, in a randomized, crossover fashion, while being euhydrated or after hyperhydration with 26 mL/kg bodyweight (BW) of a 130 mmol/L sodium solution. Subjects then ran four successive 4.5 km blocks alternating between 2.5 km at 1% and 2 km at 6% gradient, while drinking a total of 7 mL/kg BW of a 6% sports drink solution (Gatorade, USA). PEH increased BW by 1.00 ± 0.34 kg (<em>P</em> < 0.01) and, compared with PEE, reduced BW loss from 3.1% ± 0.3% (EUH) to 1.4% ± 0.4% (HYP) (<em>P</em> < 0.01) during exercise. Running TT time did not differ between groups (PEH: 85.6 ± 11.6 min; PEE: 85.3 ± 9.6 min, <em>P</em> = 0.82). Heart rate (5 ± 1 beats/min) and rectal (0.3 ± 0.1 °C) and body (0.2 ± 0.1 °C) temperatures of PEE were higher than those of PEH (<em>P</em> < 0.05). There was no significant difference in abdominal discomfort and perceived exertion or heat stress between groups. Our results suggest that pre-exercise sodium-induced hyperhydration of a magnitude of 1 L does not alter 80–90 min running TT performance under warm conditions in highly-trained runners drinking ~500 mL sports drink during exercise