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ArticleNear-infrared analysis and model optimization about main Chemical Components of pulpwood in Hainan Province
XV World Forestry Congress, 2-6 May 2022
2022Also available in:
No results found.In order to improve the utilization of pulpwood in Hainan Province, alleviate the shortage of pulping materials, reduce pollution and overall costs in Chinese pulping and papermaking industry, this study aimed to use near- infrared spectroscopy to realize the rapid analysis of holocellulose and Klason lignin content in pulpwood. A holographic grating near-infrared pectrometer, with a simple structure and easy modification, was used to collect the near-infrared spectrum of 205 samples of pulpwood common in Hainan (E.urophlla× E.tereticornis, Eucalyptus urophylla×grandis, Eucalyptus urophylla, Acacia mangium, Acacia crassicarpa Benth.), and the content of holocellulose and Klason lignin were measured ccording to the traditional laboratory methods. Suitable pretreatment methods were selected in combination with partial least squares (PLS) to establish analysis models of holocellulose and Klason lignin. Then genetic algorithm was used to eliminate the irrelevant variables and clarify the feature absorption of holocellulose and Klason lignin in order to optimize the models. The holocellulose model was established by pretreatment methods of smoothing, vector normalization, first derivative of the original spectrum, with 1150.3~2362.0nm bands participated in modeling. The RMSEP value of the model was 0.55% and the absolute deviation range was -0.91~0.87%. The Klason lignin model was established by pretreatment methods of smoothing, multiplicative scatter correction(MSC), second derivative of the original spectrum, with 1137.6~1872.5nm and 2131.0~2424.1nm bands participated in modeling. The RMSEP value of the model was 0.45% and the absolute deviation range was -0.76~0.79%. The RPD values of the two models were 4.71 and 3.47, respectively, which can meet the industrial needs of online rapid analysis. At the same time, this study provides a theoretical basis for the establishment of a near-infrared characterization system for pulpwood. Keywords: near-infrared; Genetic Algorithm; characteristic wavelengths; holocellulose; Klason lignin ID: 3486598 -
BookletA primer on soil analysis using visible and near-infrared (vis-NIR) and mid-infrared (MIR) spectroscopy
Soil spectroscopy training manual #1
2022“A primer on soil analysis using visible and near-infrared (vis-NIR) and mid-infrared (MIR) spectroscopy” is the first training material on the topic of soil spectroscopy for beginner levels, by the Global Soil Laboratory Network Initiative on Soil Spectroscopy (GLOSOLAN-Spec) of the Global Soil Partnership, FAO. This document provides an introduction to the use of soil spectroscopy for soil analysis and covers the basic and fundamental procedures for using this technology for soil analysis. The series “Soil spectroscopy training material” is part of the Global Soil Laboratory Network (GLOSOLAN) to strengthen the capacity of laboratories in soil analysis. It provides a series of training materials covering wide range of topics in soil vis-NIR and MIR spectroscopy. The overall objective is to develop national and regional soil spectral libraries with an estimation service, and to provide advisory services on appropriate instrumentation. -
ArticleBudgetary and property evaluation of bamboo products: The case of forestry research institute of Nigeria
XV World Forestry Congress, 2-6 May 2022
2022Also available in:
No results found.The increasing difficulty in sourcing timber species in Nigeria necessitates seeking for alternatives species. Providing alternative species requires knowledge on the technical properties and budgetary evaluation particularly in relation to their utilization. Bambusa vulgaris from available evidence had been used for light construction and production in some parts of Nigeria; however, there is dearth of information on its technical properties and budgetary evaluation. Therefore, this study was conducted to evaluate selected properties and budgetary evaluation of Bamboo. Bamboo culms were harvested, processed into valuable products such as Tables, Chairs, Bed, flower vases, lamp stands and many other household items with detail analysis on the cost of production in either round or laminated form. The technical properties considered include: Modulus of rupture (MOR) and Modulus of elasticity (MOE), while the budgetary analysis include: Rate of Returns on Investment and cost benefit analysis of the production. Result of the properties shows that the mean MOE of B. vulgaris was 4556.21±98.42N/mm2. While mean MOR of B. vulgaris was 51.88±112.80N/mm. The Rate of Returns (RORI) of bamboo furniture is above 60% and Cost Benefit Ratio is higher than 1. There are potentials in utilizing bamboo for the production of structural materials being a medium density wood and slightly dimensionally stable. It is also a profitable venture for utilization and it has the potential of serving as a suitable alternative to the scarce tropical timber species Keywords: Value chain, Research, Innovation, Sustainable forest management, Financial mechanisms ID: 3474266
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