Author: Clarence J. EhlersPublisher:
ISBN:
Category : Soil moisture
Languages : en
Pages : 156
Book Description
The Nuclear Method of Soil-moisture Determination at Depth
Author: Clarence J. EhlersPublisher:
ISBN:
Category : Soil moisture
Languages : en
Pages : 156
Book Description
Symposium on Nuclear Methods for Measuring Soil Density and Moisture
Author: ASTM Committee D-18 on Soils for Engineering PurposesPublisher: ASTM International
ISBN:
Category : Nuclear physics
Languages : en
Pages : 113
Book Description
Selected Water Resources Abstracts
Author: Density and Moisture Content Measurements by Nuclear Methods
Author: Robin P. GardnerPublisher:
ISBN:
Category : Radioactive gages
Languages : en
Pages : 56
Book Description
Sources of error that have been identified on the gamma-ray soil density gauge are: (1) sensitivity to local density variations, especially at the soil surface, (2) sensitivity to soil composition, and (3) inaccurate calibration techniques. An attempt was made to solve these problems by developing for each gauge calibration models that enable stable and homogenous non-soil standards to be used for calibration. Calibration standards and calibration models for each gauge were found and tested. In the process of developing and testing the new nuclear gauge calibration model, the dual-gauge principal of compensating these gauges for variations in soil composition was discovered. The air-gap method of using this principal is explained and was optimized by using the calibration model developed in the current study.
Instrumentation for Measurement of Moisture
Author: L. F. BallardPublisher: Highway Research Board
ISBN:
Category : Science
Languages : en
Pages : 632
Book Description
The objective of this study was to evaluate the suitability of existing instrumentation and techniques and to stimulate development of modified or new procedures to measure the amount and state of water in highway components, such as embankments, subgrades, base courses, pavements, and structures. In accomplishing this objective, the researchers conducted an extensive literature review. Those techniques that appear to be immediately applicable to highway problems were evaluated using a linear decision model for comparing instrument performance characteristics with specific moisture measurement needs. A comprehensive list of performance characteristics with which to make this comparison was compiled.
Selected Water Resources Abstracts
Author: Advanced Agricultural Instrumentation
Author: W.G. GenslerPublisher: Springer
ISBN: 9789401084598
Category : Technology & Engineering
Languages : en
Pages : 400
Book Description
The photosynthetic process of higher plants converts carbon dioxide, water, and, light quanta into reduced sugars. The enzymes which catalyze this conversion are contained within the chloroplasts and can be thought of as split into two distinct groups. In one group are the enzymes of the IIlightll reactions, which harvest the light, oxidize water and generate two energy-rich intermediates, ATP and NADPH. These two intermediates plus carbon dioxide are the substrates for the second group, the IIdarkll reactions or Cal vi n cycle, which produce the reduced sugars. The chloroplast is completely bounded by an outer membrane. There is a separate, highly convoluted membrane system, the thyla koid system, enclosed within the chloroplast. The enzymes of the light reactions are physically associated with the thylakoid mem branes, while the Calvin cycle enzymes are free-floating within the stroma, or soluble part of the chloroplast (Fig. 1). GRANA MEMBRANES ARE REG I ONS WHERE THE MEMBRANES ARE APPRESSED ON EACH OTHER MEMBRANES WH ICH ARE UNAPPRESSED THT1.AKO ID t1EHBRANE ARE STROMA MEMBRANES ( ) (VES I OJLAR) (c _______ Figure 1. Schematic representation of the photosynthetic process in plant chloroplasts. PC and PCred are the oxidized and reduced ox forms of plastocyanin. PQ and PQH2 are plastoquinone and plasto quinol. For explanation, see text.
WES Microthesaurus of Scientific and Technical Terms
Author: Waterways Experiment Station (U.S.)Publisher:
ISBN:
Category : Science
Languages : en
Pages : 610
Book Description
Nuclear Science Abstracts
Author: Humidity and Moisture: Principles and methods of measuring moisture in liquids and solids. P.N. Winn, Jr., editor
Author: Arnold WexlerPublisher:
ISBN:
Category : Humidity
Languages : en
Pages : 360
Book Description