Chemical Analyses of Canadian Reference Samples: SY-2 and SY-3

As they mostly deal with undisturbed samples, soil hydrophysics analyses often present variability in their results. No one can deny that soil, and particularly structured soil, is a very complex and challenging media to describe. But it remains that the lab measurements themselves deserve attention. To what extent are they reproducible? To what extent different labs following the same protocol do they provide the same results for a given soil sample? Is this uncertainty quantifiable? Is there a way to standardize or harmonize the analyses? And of course, to what extent does it really matter when it comes to produce reliable information about i.e. drought consequences?When most of the labs related to chemical analyses can rely on ring tests to improve their capacity, soil physics labs can&#8217;t. Building reference samples that could fit into classical measurement devices is one of the options that could allow to run ring tests in soil physics measurements.The poster will present an attempt to develop reference samples in view to measure the wet end of the retention curve.

Download Full-text

MÖSSBAUER AND CHEMICAL ANALYSES OF SOME SEDIMENTS FROM THE ROMANIAN SHORE OF THE BLACK SEA

Le Journal de Physique Colloques ◽

10.1051/jphyscol:19792155 ◽

1979 ◽

Vol 40 (C2) ◽

pp. C2-445-C2-448

Author(s):

D. Barb ◽

L. Diamandescu ◽

M. Morariu ◽

I. I. Georgescu

Keyword(s):

Black Sea ◽

The Black Sea ◽

Chemical Analyses

Download Full-text

Colorimetric research of self-luminous objects in software and hardware environments by the method of multidimensional scales implementation

Izmeritel`naya Tekhnika ◽

10.32446/0368-1025it.2020-8-43-50 ◽

2020 ◽

pp. 43-50

Author(s):

Yauheniya N. Saukova

Keyword(s):

Metrological Traceability ◽

Point Of View ◽

Intermediate Precision ◽

Technical Vision ◽

Wide Range ◽

Chromaticity Coordinates ◽

Unity Of Measurements ◽

Software And Hardware ◽

Luminous Objects ◽

Reference Samples

It is shown that the issues of metrological traceability for extended self-luminous objects with a wide range of brightness have not yet been resolved, since the rank scales of embedded systems are used for processing digital images. For such scales, there is no “fixed” unit, which does not allow you to get reliable results and ensure the unity of measurements. An experiment is described to evaluate the accuracy of determining the intensity (coordinates) of the color of self-luminous objects. In terms of repeatability and intermediate precision compared to the reference measurement method, the color and chromaticity coordinates of self-luminous objects (reference samples) were determined by their multiple digital registration using technical vision systems. The possibilities of the developed methodology for colorimetric studies in hardware and software environments from the point of view of constructing a multidimensional conditional scale are determined.

Download Full-text

Analisis Nutrisi Umbi Ubi Jalar (Ipomoea batatas (L.) Lam.) untuk Konsumsi Bayo dan Anak-anak Suku Dani di Distrik Kurulu Kabupaten Jayawijaya

Agrotek ◽

10.30862/agt.v3i2.563 ◽

2018 ◽

Vol 3 (2) ◽

Author(s):

Andrew B. Pattikawa ◽

Antonius Suparno ◽

Saraswati Prabawardani

Keyword(s):

Sweet Potato ◽

Ipomoea Batatas ◽

Nutritional Value ◽

Animal Feed ◽

Ash Content ◽

Infants And Children ◽

Chemical Analyses ◽

Food Crop ◽

Sweet Potatoes ◽

Development Center

Sweet potato is an important staple food crop especially for the local people of Central Highlands Jayawijaya. There are many accessions that have always been maintained its existence to enrich their various uses. Traditionally, sweet potato accessions were grouped based on the utilization, such as for animal feed, cultural ceremonies, consumption for adults, as well as for infants and children. This study was aimed to analyze the nutritional value of sweet potatoes consumed by infants and children of the Dani tribe. Chemical analyses were conducted at the Laboratory of Post-Harvest Research and Development Center, Cimanggu, Bogor. The results showed that each of 4 (four) sweet potato accessions which were consumed by infants and children had good nutrient levels. Accession Sabe showed the highest water content (72.56%), vitamin C (72.71 mg/100 g), Fe (11.85 mg/100 g), and K levels (130.41 mg / 100 grams). The highest levels of protein (1.44%), fat (1.00%), energy (154.43 kkal/100 gram), carbohydrate (35.47%), starch (30.26%), reducing sugar (3.44%), riboflavin (0.18 mg/100 g), and vitamin A (574.40 grams IU/100 were produced by accession Manis. On the other hand, accession Saborok produced the highest value for ash content (1.32%), vitamin E (28.30 mg/100 g), and ?-carotene (64.69 ppm). The highest level of crude fiber (1.81 %) and thiamin (0.36 mg/100 g) was produced by accession Yuaiken.

Download Full-text