THE CHARACTERIZATION OF LACTOBACILLI FROM CHEDDAR CHEESE: II. A NUMERICAL ANALYSIS OF THE DATA BY MEANS OF AN ELECTRONIC COMPUTER

1964 ◽  
Vol 10 (5) ◽  
pp. 757-762 ◽  
Author(s):  
M. M. Hauser ◽  
R. E. Smith
Keyword(s):  
Numerical Analysis ◽  
Numerical Methods ◽  
Lactobacillus Casei ◽  
Electronic Computer ◽  
Cheddar Cheese ◽  
Lactobacillus Brevis ◽  
Computer Technique ◽  
Group Relationships ◽  
Biochemical Features

Data for 59 lactobacilli isolated from Canadian Cheddar cheese and 9 named species, previously characterized on the basis of morphological, cultural, and biochemical features, were analyzed by the Adansonian numerical methods of Sneath. Results confirmed the validity of groups, originally designated as Lactobacillus plantarum, Lactobacillus casei, Lactobacillus brevis, and Lactobacillus fermenti types. The computer technique provided numerical estimates of strain and group relationships, emphasizing the extreme heterogeneity of the groups.

THE CHARACTERIZATION OF LACTOBACILLI FROM CHEDDAR CHEESE: I. AN EVALUATION OF PHYSIOLOGICAL AND BIOCHEMICAL TESTS

1962 ◽  
Vol 8 (5) ◽  
pp. 727-735 ◽  
Author(s):  
R. E. Smith ◽  
J. D. Cunningham
Keyword(s):  
Preliminary Investigation ◽  
Skim Milk ◽  
Cheddar Cheese ◽  
Titratable Acidity ◽  
Lactobacillus Brevis ◽  
Lactobacillus Helveticus ◽  
Biochemical Tests ◽  
Morphological Studies ◽  
Hydrolysis Of

Characterization studies were conducted on 230 cultures of lactobacilli isolated from Canadian Cheddar cheese, and on an additional 15 named cultures from various sources. Preliminary investigation included reactions with 19 carbohydrates, yeast glucose litmus milk, and arginine, hippurate, and aesculin broths. This resulted in the appearance of six major groups, tentatively designated as Lactobacillus plantarum, Lactobacillus casei, Lactobacillus helveticus, Lactobacillus brevis, Lactobacillus fermenti, and an unclassifiable group. Subgroups of the divisions were noted. Sixty-eight cultures were chosen for detailed study. Tests performed included the production of catalase, nitrite, hydrogen sulphide, indole, and polysaccharide; the hydrolysis of starch, gelatin, Tweens 40 and 60, polypectate, and casein; and tolerance of growth temperatures, sodium chloride, and phenol. Titratable acidity in skim milk was determined, and morphological studies were carried out. Accumulated data indicated that the group previously designated as L. helveticus, and the unclassified group, consisted of variants of L. plantarum, L. casei, or intermediates.

Upon Impact Numerical Modeling of Foam Materials

2017 ◽  
Vol 54 (2) ◽  
pp. 195-202
Author(s):  
Vasile Nastasescu ◽  
Silvia Marzavan
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Numerical Modeling ◽  
Numerical Analysis ◽  
Numerical Methods ◽  
Boundary Conditions ◽  
General Character ◽  
Foam Material ◽  
Various Boundary Conditions ◽  
Specific Behaviour

The paper presents some theoretical and practical issues, particularly useful to users of numerical methods, especially finite element method for the behaviour modelling of the foam materials. Given the characteristics of specific behaviour of the foam materials, the requirement which has to be taken into consideration is the compression, inclusive impact with bodies more rigid then a foam material, when this is used alone or in combination with other materials in the form of composite laminated with various boundary conditions. The results and conclusions presented in this paper are the results of our investigations in the field and relates to the use of LS-Dyna program, but many observations, findings and conclusions, have a general character, valid for use of any numerical analysis by FEM programs.

scholarly journals Very Fast and Accurate Procedure for the Characterization of Photovoltaic Panels from Datasheet Information

2014 ◽  
Vol 2014 ◽  
pp. 1-10 ◽  
Author(s):  
Antonino Laudani ◽  
Francesco Riganti Fulginei ◽  
Alessandro Salvini ◽  
Gabriele Maria Lozito ◽  
Salvatore Coco
Keyword(s):  
Numerical Methods ◽  
Search Space ◽  
Extraction Process ◽  
Reduced Form ◽  
Photovoltaic Panels ◽  
Approximation Techniques ◽  
Computational Costs ◽  
Minimization Technique ◽  
Accurate Procedure

In recent years several numerical methods have been proposed to identify the five-parameter model of photovoltaic panels from manufacturer datasheets also by introducing simplification or approximation techniques. In this paper we present a fast and accurate procedure for obtaining the parameters of the five-parameter model by starting from its reduced form. The procedure allows characterizing, in few seconds, thousands of photovoltaic panels present on the standard databases. It introduces and takes advantage of further important mathematical considerations without any model simplifications or data approximations. In particular the five parameters are divided in two groups, independent and dependent parameters, in order to reduce the dimensions of the search space. The partitioning of the parameters provides a strong advantage in terms of convergence, computational costs, and execution time of the present approach. Validations on thousands of photovoltaic panels are presented that show how it is possible to make easy and efficient the extraction process of the five parameters, without taking care of choosing a specific solver algorithm but simply by using any deterministic optimization/minimization technique.

scholarly journals Characterization of a Lactobacillus brevis strain with potential oral probiotic properties

2018 ◽  
Vol 18 (1) ◽  
Author(s):  
Fang Fang ◽  
Jie Xu ◽  
Qiaoyu Li ◽  
Xiaoxuan Xia ◽  
Guocheng Du
Keyword(s):  
Lactobacillus Brevis ◽  
Probiotic Properties

Optimization of the Navy’s three-dimensional mine impact burial prediction simulation model, Impact35, using high-order numerical methods

2021 ◽  
pp. 154851292110286
Author(s):  
Athanasios Donas ◽  
Ioannis Famelis ◽  
Peter C Chu ◽  
George Galanis
Keyword(s):  
Numerical Analysis ◽  
Numerical Methods ◽  
Prediction Model ◽  
Simulation Model ◽  
Three Dimensional ◽  
Simulation System ◽  
High Order ◽  
Alternative Methodology ◽  
Runge Kutta ◽  
Fifth Order

The aim of this paper is to present an application of high-order numerical analysis methods to a simulation system that models the movement of a cylindrical-shaped object (mine, projectile, etc.) in a marine environment and in general in fluids with important applications in Naval operations. More specifically, an alternative methodology is proposed for the dynamics of the Navy’s three-dimensional mine impact burial prediction model, Impact35/vortex, based on the Dormand–Prince Runge–Kutta fifth-order and the singly diagonally implicit Runge–Kutta fifth-order methods. The main aim is to improve the time efficiency of the system, while keeping the deviation levels of the final results, derived from the standard and the proposed methodology, low.

Steady-state Characterization of LLC-based Single-Stage AC/DC Converter Based on Numerical Analysis

2021 ◽  
pp. 1-1
Author(s):  
Xiang Li ◽  
Liuniu Guo ◽  
Tianchen Lang ◽  
Daorong Lu ◽  
Khalil Alluhaybi ◽  
...  
Keyword(s):  
Steady State ◽  
Numerical Analysis ◽  
Single Stage

THE RESOLUTION CORRECTION IN THE SCINTILLATION SPECTROMETRY OF CONTINUOUS X RAYS

1958 ◽  
Vol 36 (12) ◽  
pp. 1624-1633 ◽  
Author(s):  
W. R. Dixon ◽  
J. H. Aitken
Keyword(s):  
Integral Equation ◽  
Numerical Analysis ◽  
Numerical Methods ◽  
Analytical Procedure ◽  
Pulse Height ◽  
Matrix Inversion ◽  
Height Distribution ◽  
X Rays ◽  
Smooth Solutions ◽  
Pulse Height Distribution

The problem of making resolution corrections in the scintillation spectrometry of continuous X rays is discussed. Analytical solutions are given to the integral equation which describes the effect of the statistical spread in pulse height. The practical necessity of making some kind of numerical analysis is pointed out. Difficulties with numerical methods arise from the fact that the observed pulse-height distribution cannot be defined precisely. As a result it is possible in practice only to find smooth "solutions". Additional difficulties arise if the numerical method is based on an invalid analytical procedure. For example matrix inversion is of doubtful value in making the resolution correction because there does not appear to be an inverse kernel for the integral equation in question.

Numerical Analysis of Air Measuring Station Location Optimization in Underground Mine Airway

2014 ◽  
Vol 960-961 ◽  
pp. 621-624
Author(s):  
Jing Zhao Zhang ◽  
Yong Sheng Yan ◽  
Zhen Guo Yan ◽  
Feng Liang Wu
Keyword(s):  
Numerical Analysis ◽  
Numerical Methods ◽  
Underground Mine ◽  
Inlet Velocity ◽  
Location Optimization ◽  
Measuring Station ◽  
Numerical Tests ◽  
Station Location

The optimized air measuring station location of mine airway based on air fully developed was proposed and numerical tests were conducted with six models. The independence of air fully development and inlet velocity was analyzed which validated the models and the numerical methods. The results show that optimized air measuring station location in head entry is 132m-198m after the airway turning while 5.0m-10.1m before the airway turning in tail entry.

Characterization of β-glucan formation by Lactobacillus brevis TMW 1.2112 isolated from slimy spoiled beer

2018 ◽  
Vol 107 ◽  
pp. 874-881 ◽  
Author(s):  
Marion E. Fraunhofer ◽  
Andreas J. Geissler ◽  
Daniel Wefers ◽  
Mirko Bunzel ◽  
Frank Jakob ◽  
...  
Keyword(s):  
Lactobacillus Brevis
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