Abstract Porang is well known with its high glucomannan content. Determination of the chemical content porang flour commonly carried out by methods in laboratory, which are to take a long time and expensive. This study aims determine using near infrared spectroscopy (NIRS). The reflectance was measured an FT NIR spectrometer at wavelength 1000 2500 nm. (water content) determined oven spectropho...

Chili (Capsicum annuum L.) is an important source of total carotene and vitamin C. Both substances are widely used in food processing materials, supporting a healthy immune system medicine. However, destructive testing often obtains information about the substances, which damages tested material requires relatively long analysis. Therefore, this research aims to develop calibration models C chi...

PURPOSE An attenuation correction is necessary to improve quantitative SPECT evaluation. The aim of this study was to evaluate the performance of several different types of commercial attenuation correction algorithms. METHODS We investigated the performance of four attenuation correction algorithms using a simulation phantom with and without scatter. The attenuation correction was performed ...

A method for determination of propranolol hydrochloride in pharmaceutical preparation using near infrared spectrometry with fiber optic probe (FTNIR/PROBE) and combined with chemometric methods was developed. Calibration models were developed using two variable selection models: interval partial least squares (iPLS) and synergy interval partial least squares (siPLS). The treatments based on the...

introduction: scattered photon is one of the main defects that degrade the quality and quantitative accuracy of nuclear medicine images. accurate estimation of scatter in projection data of spect is computationally extremely demanding for activity distribution in uniform and non-uniform dense media. methods: the objective of this paper is to develop and validate a scatter correction technique ...

Amino acids are quite important indices to indicate the growth status of oilseed rape under herbicide stress. Near infrared (NIR) spectroscopy combined with chemometrics was applied for fast determination of glutamic acid in oilseed rape leaves. The optimal spectral preprocessing method was obtained after comparing Savitzky-Golay smoothing, standard normal variate, multiplicative scatter corre...

OBJECTIVE A method for rapid analysis of the refining process of honey was developed based on near-infrared (NIR) spectroscopy. METHODS Partial least square calibration models were built for the four components after the selection of the optimal spectral pretreatment method and latent factors. RESULTS The models covered the samples of different temperatures and time points, therefore the mo...