Accelerating rejection-based simulation of biochemical reactions with bounded acceptance probability

2016 ◽  
Vol 144 (22) ◽  
pp. 224108 ◽  
Author(s):  
Vo Hong Thanh ◽  
Corrado Priami ◽  
Roberto Zunino
Keyword(s):  
Biochemical Reactions ◽  
Acceptance Probability

Photosynthetic activity as the basis of potato productivity when using phytohormones

2020 ◽  
Author(s):  
A.V. Shitikova ◽  
◽  
A.A. Abiala
Keyword(s):  
Photosynthetic Activity ◽  
Moscow Region ◽  
Metabolic Processes ◽  
Biochemical Reactions ◽  
Podzolic Soils ◽  
Increase In Productivity

The results of studies on the role of growth biostimulants in the exogenous regulation of potato productivity on sod-podzolic soils of the Moscow region are presented.Studies have established the specificity of the action of phytohormones.The stimulating effect of the drugs manifested itself in the intensification of metabolic processes, changing the direction of biochemical reactions, which led to an increase in productivity.

Non-steady variations of SOD and phosphate release rate due to changes in the quality of the overlying water

2000 ◽  
Vol 42 (3-4) ◽  
pp. 265-272 ◽  
Author(s):  
T. Inoue ◽  
Y. Nakamura ◽  
Y. Adachi
Keyword(s):  
Release Rate ◽  
Oxygen Demand ◽  
Phosphate Concentration ◽  
Sediment Oxygen Demand ◽  
Biochemical Reactions ◽  
Overlying Water ◽  
Phosphate Release ◽  
Do Concentration ◽  
The Difference

A dynamic model, which predicts non-steady variations in the sediment oxygen demand (SOD) and phosphate release rate, has been designed. This theoretical model consists of three diffusion equations with biochemical reactions for dissolved oxygen (DO), phosphate and ferrous iron. According to this model, step changes in the DO concentration and flow velocity produce drastic changes in the SOD and phosphate release rate within 10 minutes. The vigorous response of the SOD and phosphate release rate is caused by the difference in the time scale of diffusion in the water boundary layer and that of the biochemical reactions in the sediment. Secondly, a negative phosphate transfer from water to sediment can even occur under aerobic conditions. This is caused by the decrease in phosphate concentration in the aerobic layer due to adsorption.

scholarly journals Chemical and biochemical thermodynamics reunification (IUPAC Technical Report)

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Antonio Sabatini ◽  
Marco Borsari ◽  
Gerard P. Moss ◽  
Stefano Iotti
Keyword(s):  
Chemical Reactions ◽  
Atp Hydrolysis ◽  
Joint Commission ◽  
Chemical Thermodynamics ◽  
Thermodynamic Quantities ◽  
Biochemical Reactions ◽  
Mathematical Transformation ◽  
Biochemical Nomenclature ◽  
Thermodynamic Potentials ◽  
Technical Report

AbstractAccording to the 1994 IUBMB-IUPAC Joint Commission on Biochemical Nomenclature (JCBN) on chemical and biochemical reactions, two categories of thermodynamics, based on different concepts and different formalisms, are established: (i) chemical thermodynamics, which employ conventional thermodynamic potentials to deal with chemical reactions [1], [2], [3]; and (ii) biochemical thermodynamics, which employ transformed thermodynamic quantities to deal with biochemical reactions based on the formalism proposed by Alberty [4], [5], [6], [7]. We showed that the two worlds of chemical and biochemical thermodynamics, which so far have been treated separately, can be reunified within the same thermodynamic framework. The thermodynamics of chemical reactions, in which all species are explicitly considered with their atoms and charge balanced, are compared with the transformed thermodynamics generally used to treat biochemical reactions where atoms and charges are not balanced. The transformed thermodynamic quantities suggested by Alberty are obtained by a mathematical transformation of the usual thermodynamic quantities. The present analysis demonstrates that the transformed values for ΔrG′0 and ΔrH′0 can be obtained directly, without performing any transformation, by simply writing the chemical reactions with all the pseudoisomers explicitly included and the elements and charges balanced. The appropriate procedures for computing the stoichiometric coefficients for the pseudoisomers are fully explained by means of an example calculation for the biochemical ATP hydrolysis reaction. It is concluded that the analysis reunifies the “two separate worlds” of conventional thermodynamics and transformed thermodynamics.

scholarly journals Statistical Approach for Risk Assessment of Aflatoxin Sampling Plan Used by Manufacturers for Raw Shelled Peanuts

2002 ◽  
Vol 85 (4) ◽  
pp. 925-932 ◽  
Author(s):  
Mark Vandeven ◽  
Thomas Whitaker ◽  
Andy Slate
Keyword(s):  
Test Methods ◽  
Sampling Plan ◽  
Raw Material ◽  
Contamination Level ◽  
Acceptance Probability ◽  
Preparation Methods ◽  
Crop Varieties ◽  
Analytical Test ◽  
Acceptance Sampling Plans ◽  
Methods Analytical

Abstract Processed food manufacturers often use acceptance sampling plans to screen out lots with unacceptable levels of contamination from incoming raw material streams. Sampling plan designs are determined by specifying sample sizes, sample preparation methods, analytical test methods, and accept/reject criteria. Sampling plan performance can be indicated by plotting acceptance probability versus contamination level as an operating characteristic (OC) curve. In practice, actual plan performance depends on the level of contamination in the incoming lot stream. This level can vary considerably over time, among different crop varieties, and among locales. To better gauge plan performance, a method of coupling an OC curve and crop distributions is proposed. The method provides a precise probabilistic statement about risk and can be easily performed with commercial spreadsheet software.

scholarly journals Measuring the Impacts of Saffron Production Promotion Measures on Farmers’ Policy Acceptance Probability: A Randomized Conjoint Field Experiment in Herat Province, Afghanistan

2020 ◽  
Vol 12 (10) ◽  
pp. 4026
Author(s):  
Mohammad Wais Azimy ◽  
Ghulam Dastgir Khan ◽  
Yuichiro Yoshida ◽  
Keisuke Kawata
Keyword(s):  
Causal Effects ◽  
Acceptance Probability ◽  
Promotion Policy ◽  
Governmental Organizations ◽  
Non Governmental Organizations ◽  
Promotion Policies ◽  
The Status ◽  
Conjoint Experiment ◽  
The Government

The government of Afghanistan promotes saffron production as a means to achieve economic development while reducing the widely spread opium cultivation in the country by providing necessary support to its farmers via saffron farmer service centers. This study investigates the causal effects of relevant attributes of potential saffron production promotion policies on the participation probabilities of saffron farmers. This study applies a randomized conjoint experiment to primary survey data of 298 farmers in Herat Province, which is perceived by the government as the center of saffron production in the country. The proposed hypothetical saffron production promotion policy consists of six attributes, namely, provision of machinery equipment, weather-based crop insurance, accessibility to long-term loans, location of saffron farmer service centers, provider of services, and annual payment. In the randomized conjoint experiment design, the respondents rank two alternative policies and policies against the status quo. The desirable policy comprises the machinery provision, long-term (up to 5 years) loan accessibility, an easily accessible service center, and policy implementation by international non-governmental organizations (NGOs). The estimated results reveal that saffron farmers are highly supportive of the proposed saffron promotion policy and that their willingness to pay is as high as 17% of their per capita income.

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