Physicochemical Properties of Aqueous Hydroxylamine Sulfate and Aqueous (Hydroxylamine Sulfate + Ammonium Sulfate) Solutions at Different Temperatures

2009 ◽  
Vol 54 (7) ◽  
pp. 2028-2032 ◽  
Author(s):  
Sheng Fang ◽  
Jian-Guo Zhang ◽  
Jian-Qing Liu ◽  
Ming Liu ◽  
Sheng Luo ◽  
...  
Keyword(s):  
Physicochemical Properties ◽  
Ammonium Sulfate ◽  
Sulfate Solutions ◽  
Different Temperatures ◽  
Hydroxylamine Sulfate

scholarly journals Changes of Physicochemical Properties of Starch Syrups Recommended for Winter Feeding of Honeybees during Storage

Agriculture ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 374
Author(s):  
Teresa Szczęsna ◽  
Ewa Waś ◽  
Piotr Semkiw ◽  
Piotr Skubida ◽  
Katarzyna Jaśkiewicz ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Physicochemical Properties ◽  
Physicochemical Parameters ◽  
Storage Temperature ◽  
Storage Conditions ◽  
Different Temperatures ◽  
And Storage ◽  
Bee Colonies ◽  
Temperature Time ◽  
Winter Feeding

The aim of this study was to determine the influence of storage temperature and time on physicochemical parameters of starch syrups recommended for the winter feeding of bee colonies. The studies included commercially available three starch syrups and an inverted saccharose syrup that were stored at different temperatures: ca. 20 °C, 10–14 °C, and ca. 4 °C. Physicochemical parameters of fresh syrups (immediately after purchase) and syrups after 3, 6, 9, 12, 15, 18, 21, and 24 months of storage at the abovementioned temperatures were measured. It was observed that the rate of unfavorable changes in chemical composition of starch syrups and the inverted saccharose syrup, mainly the changes in the 5-hydroxymethylfurfural (HMF) content, depended on the type of a syrup and storage conditions (temperature, time). Properties of tested starch syrups intended for winter feeding of bees stored at ca. 20 °C maintained unchanged for up to 6 months, whereas the same syrups stored at lower temperatures (10–14 °C) maintained unchanged physicochemical parameters for about 12 months. In higher temperatures, the HMF content increased. To date, the influence of this compound on bees has not been thoroughly investigated.

Thermodynamic and Transport Properties of Some Disaccharides in Aqueous Ammonium Sulfate Solutions at Various Temperatures

2008 ◽  
Vol 53 (8) ◽  
pp. 1713-1724 ◽  
Author(s):  
Parampaul K. Banipal ◽  
Vickramjeet Singh ◽  
Gurpreet Kaur ◽  
Mandeep Kaur ◽  
Tarlok S. Banipal
Keyword(s):  
Transport Properties ◽  
Ammonium Sulfate ◽  
Sulfate Solutions ◽  
Thermodynamic And Transport Properties

scholarly journals CHEMICAL INVESTIGATIONS ON THE ACTIVE PRINCIPLES OF THE PHENOMENON OF LOCAL SKIN REACTIVITY TO BACTERIAL FILTRATES

1938 ◽  
Vol 67 (1) ◽  
pp. 1-12 ◽  
Author(s):  
Gregory Shwartzman ◽  
S. A. Morell
Keyword(s):  
Particle Size ◽  
Physicochemical Properties ◽  
Ammonium Sulfate ◽  
Culture Filtrate ◽  
Active Materials ◽  
Local Skin ◽  
Skin Reactivity ◽  
Average Porosity ◽  
Active Substances ◽  
Capillary Analysis

Several physicochemical properties of the active principles of the phenomenon of local skin reactivity to bacterial filtrates have been investigated. Ultrafiltration through Zsigmondy filters of graded porosities has shown that the active substances are retained by membranes finer than 100 to 120 seconds, whereas coarser ones readily permit their passage. The average porosity of this filtration end-point represents a particle size of about 50 to 100 mµ. When fractionally precipitated with ammonium sulfate, most of the activity of a culture filtrate was concentrated in the two-thirds saturated portion. Isoelectric properties were studied by means of capillary analysis and cataphoresis. At pH 3.0 and below, the substances suspended in the culture filtrates migrated to the cathode; activity in this chamber, however, could not be demonstrated. At pH 4.0 and above, reversal to the anode occurred, as the active materials became negatively charged and readily migrated to this chamber. The isoelectric point, therefore, was considered to be between pH 3.0 and 4.0. Preliminary experiments on adsorption, extraction, and pH stability have been described.

scholarly journals Torrefaction of Almond and Walnut Byproducts

2021 ◽  
Vol 9 ◽  
Author(s):  
Zach McCaffrey ◽  
Lennard Torres ◽  
Bor-Sen Chiou ◽  
Saulo Rocha Ferreira ◽  
Luiz Eduardo Silva ◽  
...  
Keyword(s):  
Physicochemical Properties ◽  
Moisture Absorption ◽  
Calorific Value ◽  
Dynamic Vapor Sorption ◽  
Energy Applications ◽  
Thermochemical Process ◽  
Heat Treated ◽  
The Us ◽  
Torrefied Biomass ◽  
Different Temperatures

While the US nut industry is growing, markets for nut by-products, particularly nutshells and tree prunings, have not kept pace. Torrefaction is a thermochemical process used to improve physicochemical properties of biomass for energy and other applications. The goal of the paper was to characterize the effects of a range of torrefaction conditions on the properties of nut by-product feedstock. The process consists of thermal treatment of biomass at a temperature between 200 and 300°C in the absence of oxygen, where final material properties of the torrefied biomass depend on the temperature, heating rate, and residence time. In general, torrefied biomass exhibits higher hydrophobicity and calorific value with reduced moisture absorption compared to untreated biomass, making it an ideal fuel source for energy applications compared to raw biomass. In this study, almond shells of soft, semi-soft, and hardshell varieties, as well as walnut shells and almond wood, were torrefied at two different temperatures (230 and 290°C) and three different residence times (20, 40, and 60 min) in order to characterize the physicochemical properties. The thermal behavior of raw and heat-treated biomass was investigated by TGA analysis, elemental analysis, pH, helium pycnometry, FTIR spectroscopy, and dynamic vapor sorption analysis.

scholarly journals Correlations of the physicochemical properties of organosolv lignins from Broussonetia papyrifera with their antioxidant activities

2020 ◽  
Vol 4 (10) ◽  
pp. 5114-5119
Author(s):  
Lan Yao ◽  
Long Xiong ◽  
Chang Geun Yoo ◽  
Chengyu Dong ◽  
Xianzhi Meng ◽  
...  
Keyword(s):  
Physicochemical Properties ◽  
Antioxidant Activities ◽  
Broussonetia Papyrifera ◽  
Organosolv Pretreatment ◽  
Different Temperatures ◽  
Lignin Characteristics

To understand the influence of lignin characteristics on their antioxidant activities, lignins were isolated from Broussonetia papyrifera by organosolv pretreatment at different temperatures.

Glyoxal in Aqueous Ammonium Sulfate Solutions: Products, Kinetics and Hydration Effects

2011 ◽  
Vol 45 (15) ◽  
pp. 6336-6342 ◽  
Author(s):  
Ge Yu ◽  
Amanda R. Bayer ◽  
Melissa M. Galloway ◽  
Kyle J. Korshavn ◽  
Charles G. Fry ◽  
...  
Keyword(s):  
Ammonium Sulfate ◽  
Sulfate Solutions
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