Test Method for Determining the Stability of Compost by Measuring Oxygen Consumption

A dose-controlled chemical sympathectomy with 6-hydroxydopamine (6-OHDA) did not disrupt thermostasis in the pigeon at +38 °C. At +6 °C, thermogenesis was impaired, but the lower body temperature and oxygen consumption were stable and vasoconstriction was normal. The stability may partly be explained by a massive release of adrenaline from the adrenals (50% in 20 min). Despite a deficit in heat production both after sympathectomy and after acute 6-OHDA, no change in muscle electrical activity was observed. Plasma free fatty acid (FFA) concentration was significantly elevated after sympathectomy, but no changes occurred in blood glucose or plasma lactate levels. The results indicate a major compensatory role for the adrenals in avian thermogenesis. They also suggest a sympathetically mediated auxiliary thermogenic mechanism independent of muscle electrical activity and coupled to FFA metabolism.

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Multi-sensor data fusion based on consistency test and sliding window variance weighted algorithm in sensor networks

Computer Science and Information Systems ◽

10.2298/csis110617004s ◽

2013 ◽

Vol 10 (1) ◽

pp. 197-214 ◽

Cited By ~ 6

Author(s):

Jian Shu ◽

Ming Hong ◽

Wei Zheng ◽

Li-Min Sun ◽

Xu Ge

Keyword(s):

Sensor Networks ◽

Internal Noise ◽

Sliding Window ◽

Test Method ◽

Sensor Data ◽

Data Simulation ◽

Consistency Test ◽

Multi Sensor Data Fusion ◽

Weighted Algorithm ◽

The Stability

In order to solve the problem that the accuracy of sensor data is reducing due to zero offset and the stability is decreasing in wireless sensor networks, a novel algorithm is proposed based on consistency test and sliding-windowed variance weighted. The internal noise is considered to be the main factor of the problem in this paper. And we can use consistency test method to diagnose whether the mean of sensor data is offset. So the abnormal data is amended or removed. Then, the result of fused data can be calculated by using sliding window variance weighted algorithm according to normal and amended data. Simulation results show that the misdiagnosis rate of the abnormal data can be reduced to 3% by using improved consistency test with the threshold set to [0.05, 0.15], so the abnormal sensor data can be diagnosed more accurately and the stability can be increased. The accuracy of the fused data can be improved effectively when the window length is set to 2. Under the condition that the abnormal sensor data has been amended or removed, the proposed algorithm has better performances on precision compared with other existing algorithms.

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Preparation of Isotopically Labelled Standards of Creatinine Via H/D Exchange and Their Application in Quantitative Analysis by LC-MS

Molecules ◽

10.3390/molecules25071514 ◽

2020 ◽

Vol 25 (7) ◽

pp. 1514

Author(s):

Remigiusz Bąchor ◽

Andrzej Konieczny ◽

Zbigniew Szewczuk

Keyword(s):

Internal Standard ◽

Test Method ◽

Simple Test ◽

Liquid Chromatography Mass Spectrometry ◽

Creatinine Concentration ◽

Back Exchange ◽

Acidic Conditions ◽

Facile Preparation ◽

The Stability ◽

Neutral Conditions

Kidneys play a crucial role in maintaining metabolic homeostasis in a body. Serum creatinine concentration is a simple test used as an indicator of renal function. One of the known ways of quantifying creatinine concentration is the liquid chromatography-mass spectrometry (LC-MS) method, using an isotopically labeled analog of creatinine as an internal standard. Unfortunately, such isotope-labeled analogs are expensive and their synthesis is complex. Here we demonstrate a facile preparation of deuterated analogues of creatinine, via the H/D exchange of hydrogens located at the α-carbon (α-C) of the N-methylated amino acid part, under basic conditions. The stability of retrieved isotopologues was analyzed under both neutral or acidic conditions, and the results revealed that the introduced deuterons do not undergo back-exchange. In addition, the coelution of deuterated and non-deuterated forms under acidic and neutral conditions was observed. The prepared isotopologues were successfully applied in the quantitative LC-MS analysis of urine samples, and the results demonstrated that the presented strategy is novel and inexpensive, and that the quantification correlates with the commonly used Jaffe test method.

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Analysis of the Sensitivity of Impact Factors on the Stability of Expansion Freeway Slope

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.405-408.1830 ◽

2013 ◽

Vol 405-408 ◽

pp. 1830-1833 ◽

Cited By ~ 1

Author(s):

Gen Chuan Luo ◽

Zhong Ming He ◽

Xin Tong Zhao

Keyword(s):

Slope Angle ◽

Soil Layer ◽

Friction Angle ◽

Test Method ◽

Impact Factors ◽

Factors Affecting ◽

Orthogonal Test Method ◽

Main Factors ◽

The Stability ◽

Method Analysis

By analysis its own characteristics of Reconstruction and Extension freeway slope, summary and presents the main factors affecting slope stability; then use orthogonal test method, analysis the result by Range Method, it indicated that the sensibility of impact factors on the Stability of Reconstruction and Extension Freeway Slope was in the following order: the slope angle after excavation, cohesion, weight of soil layer, internal friction angle, the slope angle before excavation, Cable length, Cable spacing.

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