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Educational laboratory assignment outlining an experimental investigation to determine the products of the thermal decomposition of potassium hydrogencarbonate through quantitative analysis and mole calculations.
Year:
2019
Publication:
Education in Chemistry
Publisher:
Royal Society of Chemistry
Subject:
Thermal decomposition of potassium hydrogencarbonate
Topic:
Determination of decomposition products through experimental analysis
Type of document:
Educational laboratory investigation brief
Educational level:
Secondary chemistry education
Apparatus provided:
Bunsen burner, tripod, pipe clay triangle, crucible and lid, tongs, heat proof mat, balance
Required components:
Aim, method, risk assessment, accuracy and reliability considerations, results table, mole calculations, graphical analysis, error discussion
Chemical compounds involved:
KHCO3, K2O, KOH, K2CO3, CO2, H2O
Period of publication:
January 2019
Price: 8 / 10 USD
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Year:
2015
Region / City:
Leeds, Trondheim, Sydney
Topic:
Multiregional input-output systems, environmental impact, carbon emissions
Document Type:
Research Article
Author:
Anne Owen, Kjartan Steen-Olsen, John Barrett, Thomas Wiedmann, Manfred Lenzen
Target Audience:
Researchers, policymakers, environmental analysts
Period of Action:
2010–2015
Approval Date:
Not specified
Date of Changes:
Not specified
Note:
Year
Author:
Giuseppina Magri, Michael Barter, Jack Fletcher-Charles, Heungjae Choi, Daniel Slocombe, Emma Richards, Andrea Folli, Adrian Porch, Damien M. Murphy
Year:
2022
Conference:
ICASSP
Title of Paper:
Adaptive Variational Nonlinear Chirp Mode Decomposition
Authors:
Xinghao Ding; Andreas Jakobsson; Xiaotong Tu; Yue Huang
Affiliations:
Xiamen University; Lund University
Field:
Signal Processing
Keywords:
Nonlinear chirp signal; Non-stationary signal analysis; Bayesian inference; Mode decomposition; Time-frequency representation; Expectation-Maximization algorithm
Methodology:
Bayesian adaptive variational framework with conjugate priors and iterative posterior estimation
Experiments:
Simulated two-component nonlinear chirp signal; Real-world baiji whistle signal
Application Areas:
Speech analysis; Fault diagnosis; Ocean signal analysis
Noise Assumption:
Independent zero-mean Gaussian noise
Code Availability:
Github Repositories
Year range:
1998–2016
Country:
South Africa
Population:
Women of childbearing age (15–49 years)
Health outcomes:
Obesity and overweight
Stratification:
Rural and urban residence
Variables analyzed:
Age, socioeconomic status, population group, education, employment status, marital status, area of residence, lifestyle (smoking)
Population groups:
Black African, Coloured, Asian/Indian, White
Statistical measures:
Concentration index decomposition
Statistical details:
Bootstrapped standard errors in parentheses
Significance levels:
*** p<0.01, ** p<0.05
Type of document:
Statistical table
Subject area:
Public health and health inequalities
Year:
Not specified
Region / Country:
Not specified
Subject:
Software Engineering
Topic:
Modularisation and System Decomposition
Document Type:
Educational Assignment
Institution:
Not specified
Author:
Not specified
Intended Audience:
Students studying software engineering or system design
System Context:
Smart Home System controlled through a mobile application
Key Concepts:
Subsystems, functional modules, team roles, testing, integration, project reflection
Structure:
Five-step analytical exercise
Year:
2026
Region / City:
Australia
Topic:
Nutritional Formulation, Food for Special Medical Purposes
Document Type:
Submission to PBAC
Organization / Institution:
PBAC, Nutricia Australia Pty Ltd
Author:
Nutricia Australia Pty Ltd
Target Audience:
Healthcare professionals, regulatory bodies, pediatricians
Validity Period:
Ongoing
Approval Date:
1 August 2002
Date of Change:
2011, 2026
Requested Change:
Formulation modification to comply with EU regulations
Status:
Approved for continued listing
Year:
Not specified
Region / City:
Not specified
Topic:
Hazardous Chemicals, Safety Procedures
Document Type:
Standard Operating Procedure
Organization / Institution:
Not specified
Author:
Not specified
Target Audience:
Employees working with Potassium Permanganate
Period of Validity:
Not specified
Approval Date:
Not specified
Date of Amendments:
Not specified
Year:
2017–2018
Region / City:
Aswan, Egypt
Crop:
Mango cvs Sadek and Zebda
Treatment:
Potassium silicate foliar spray
Concentrations:
0.1–0.4%
Application frequency:
One, two, or three times
Research institution:
Tropical Fruits Research Department, Horticultural Research Institute, ARC, Giza, Egypt
Authors:
Omar A. Khalil, Al-Hussein S. A. Hamad, Mona M. M. Oraby
Soil type:
Newly reclaimed sandy-loam
Experimental design:
Thirty 9-year-old trees per cultivar, uniform vigor, planted 5x6 meters apart
Irrigation:
Surface irrigation using Nile water
Measured parameters:
Growth, photosynthetic pigments, nutrient status, yield, fruit quality
Key findings:
Twice spraying at 0.2% K-silicate optimized yield and fruit quality; Sadek outperformed Zebda under Upper Egypt conditions
Source:
New York Science Journal, 2019; 12(1):1-11, doi:10.7537/marsnys120119.01
Year:
2021
Region / City:
South Africa
Topic:
Pesticides, Forestry, Environmental Impact
Document Type:
Environmental Assessment
Organization / Institution:
Forestry South Africa (FSA), The Southern African Institute of Forestry (SAIF)
Author:
Not specified
Target Audience:
Stakeholders involved in forestry management, pesticide application professionals, environmental consultants
Effective Period:
Ongoing
Approval Date:
Not specified
Modification Date:
Not specified
Exposure Variables:
Water soluble liquid, Mixture of active ingredients, Dose and application method dependent on target species
Mitigation Strategies:
Good silviculture practices, buffer zones, correct application methods, adherence to pesticide label, stakeholder consultation
Year:
2016
Region:
Minia Governorate, Egypt
Topic:
Agricultural water management, potato cultivation
Document type:
Research article
Institution:
Faculty of Agriculture, Minia University; Water Management Research Institute, National Water Research Center
Authors:
Y.Y. Abdel-Ati, H.A. Abdelreheem, Haithan Elham Mohamed Zaki, Ahmed Yousry Tammam
Crop:
Potato (Solanum tuberosum)
Irrigation methods:
Surface irrigation, gated pipes
Fertilization:
Potassium sulfate, potassium nitrate, salicylic acid
Experimental design:
Split plot, four replications
Variables measured:
Water use efficiency, yield, economic evaluation, irrigation efficiency
Publication:
Nat Sci 2016;14(11):138-149
DOI:
10.7537/marsnsj141116.20
Keywords:
Surface irrigation, gated pipe development, water relationship, economic evaluation
Field location:
Mallawy, Water Requirements Research Station
Experimental period:
Full growth season
Year:
2025
Region / City:
Haryana, India (Jind, Rohtak, Jhajjar)
Subject:
Soil fertility and nutrient dynamics in agroforestry
Document Type:
Research article
Institution:
Department of Soil Science, Local Agricultural Research Centers
Author:
Thies & Grossman, Sharma et al., Negi et al., Fahad et al., Khare et al., Sun et al., Singh & Prajjwal
Target Audience:
Soil scientists, agroforestry researchers, agronomists
Study Period:
During sowing and harvest stages of crops, 2025
Sampling Depths:
0–50 cm, 51–80 cm, 81–110 cm, 111–140 cm
Tree Species:
Syzygium cumini, Psidium guajava, Phyllanthus emblica, Terminalia arjuna, Eucalyptus tereticornis, Vachellia nilotica, Melia azedarach, Tamarindus indica, Cycas revoluta, Pinus roxburghii
Measured Nutrients:
Nitrogen (N), Phosphorus (P), Potassium (K)
Methodology:
Micro-Kjeldahl method for N, spectrophotometric determination for P, chloroplatinic acid gravimetric method for K
Sampling Distances:
0 m, 2 m, 4 m, 6 m from tree trunk
Analysis:
Analysis of variance (ANOVA) for nutrient distribution across species, depth, and distance
Year:
2011
Region / City:
Karachi, Pakistan
Topic:
Fertilizer Standards
Document Type:
Standard Specification
Organization / Institution:
Pakistan Standards & Quality Control Authority
Author:
Standards Development Centre; PSQCA
Target Audience:
Fertilizer manufacturers, regulatory bodies
Adoption Date:
26 October 2011
Amendment Date:
None specified
Relevant Documents:
https://drive.google.com/file/d/1AylmLZnWAG20Yor0dM1ws72uFKTQp1yF/view?usp=sharing
Objective:
Revision and harmonization of the Pakistan Standard for Potassium Sulphate with international standards
Description:
This document is a revised standard specification for Potassium Sulphate as fertilizer, providing detailed quality, testing, and environmental requirements.
Influence of tree species and different location on soil nitrogen, phosphorus, and potassium content
Year:
2026
Region / City:
Haryana (Jind, Rohtak, Jhajjar)
Topic:
Soil fertility, Tree species, Agroforestry
Document Type:
Original Research Article
Organization / Institution:
Not mentioned
Author:
Not mentioned
Target Audience:
Researchers, Agroforestry practitioners
Period of validity:
Not specified
Approval Date:
Not mentioned
Date of Changes:
Not mentioned