scholarly journals Quantitative Colorimetric Analysis of Aloe Polysaccharides as a Measure of Aloe Vera Quality in Commercial Products

2005 ◽  
Vol 88 (3) ◽  
pp. 684-691 ◽  
Author(s):  
Alexis R Eberendu ◽  
Gabriela Luta ◽  
Joshua A Edwards ◽  
Bill H Mcanalley ◽  
Brice Davis ◽  
...  
Keyword(s):  
Colorimetric Assay ◽  
Aloe Vera ◽  
Accurate Method ◽  
Quantitative Information ◽  
Poor Quality ◽  
Colorimetric Analysis ◽  
Beneficial Effects ◽  
Aloe Gel

Abstract Aloe Vera inner leaf gel has been used as a medicinal remedy for many years. Yet some aloe products do not demonstrate beneficial effects, indicating that poor quality products are reaching the market. Therefore, an efficient and accurate method is needed to evaluate the quality of aloe products. This paper describes a quick, quantitative colorimetric assay that has been developed for the determination of glucomannan in aloe gel and products. With this method, interference by non-aloe polysaccharides or other extraneous components was absent or negligible. Data indicate that the glucomannan can be determined at parts per million (mg/L) in aqueous solutions with an accuracy of 100 ± 5% at a 10 mg/L concentration. The correlation coefficient is 0.999, and linearity is from 0.9 to 72.7 mg/L in the test solution. The method is inexpensive, simple, sensitive, and reproducible. This method was applied to determine the polysaccharide content of commercial aloe products. Both qualitative and quantitative information can be obtained in about 5 min.

scholarly journals Determination of prioritization for maintenance of the upper structure of truss bridge

2019 ◽  
Vol 276 ◽  
pp. 01036 ◽  
Author(s):  
Heni Fitriani ◽  
M. Ade Surya Pratama ◽  
Yakni Idris ◽  
Gunawan Tanzil
Keyword(s):  
Poor Quality ◽  
Truss Bridges ◽  
Vehicle Load ◽  
Bridge Maintenance ◽  
Wide Range ◽  
Maintenance Systems ◽  
Truss Bridge ◽  
Hierarchy Process

Bridge maintenance is one of the major issues of infrastructure problems. Deterioration of a bridge’s structure will continuously increase without proper maintenance. This condition will adversely affect the service life of a bridge. Moreover, the damage will also have a direct impact on structural and functional failure of the bridge. This paper aims at identifying the damages of truss bridges and determining the most significant criteria and sub-criteria used in prioritizing bridge maintenance. Analytical Hierarchy Process (AHP) was used to assess the most important criteria that give significant weight to bridge maintenance analysis. The objects of research were nine truss bridges with a wide range of types and levels of damage. It was found that there were approximately 900 m' of components damaged at the railing of Baruga Bridge and 227 m' truss damages due to poor quality of the galvanized paint. Furthermore, based on the analysis, the most significant criteria were the level of damage (27.6%), the technical aspects (25.7%), the finance (21%), the vehicle load (13.6%) and the resources (12%). The results of this research showed important findings in determining the priority scales for bridge repair and maintenance systems.

scholarly journals Production and production over-supply in construction: estimating unsold stock in Italy

2014 ◽  
Vol 7 (4) ◽  
pp. 506-523 ◽  
Author(s):  
Andrea Ciaramella ◽  
Alberto Celani
Keyword(s):  
Real Estate ◽  
Poor Quality ◽  
Real Estate Market ◽  
Content Type ◽  
The Real Estate ◽  
Real Estate Sector ◽  
Critical Issues ◽  
Definition Of

Purpose – The aim of the article is to identify the limitations and critical issues in the way information in the real estate sector in Italy is currently managed, and propose the principles of a method that would provide information and comparison of the phenomenon of over-supply and non-rational land use. This study is based on a series of assumptions, the first of which is a definition of “unsold”, deemed to mean “the amount of new housing units neither occupied nor sold nor rented”. In effect, unsold stock can be considered as over-supply of construction. Design/methodology/approach – The article identifies the critical aspects in the determination of unsold real estate in Italy, starting from the available data and research already carried out; the results are often contradictory. The comparison with programming systems of building production adopted in other countries allows identification of the guidelines that can be used to better understand and combat the phenomenon. Findings – The assessment of the state -of-the-art provides a clear picture of the shortcomings and potential of the tools used to date to meet the need of studying a complex phenomenon with many obscure points. Following the empirical analysis comes out a picture of inefficiencies due to the poor quality of information, as well as the reluctance of data-sharing and -integration procedures by the institutional and market players. Research limitations/implications – The research produces solutions addressed to the Italian situation, but it identifies systems and methods used in other countries. Practical implications – The article suggests the collection systems and management information that can be used for a more accurate knowledge of unsold real estate. Social implications – The article focuses on some of the limits of the Italian real estate market, highlighting the need for greater transparency and how this can contribute to a more conscious approach to the market. Originality/value – The article seeks to provide the necessary answers to those who must understand the reasons of harmful effects for the market, such as overproduction; besides some models focused on three areas – the procedures, the organization and the market – are also proposed.

scholarly journals Microbial fertilizers: A comprehensive review of current findings and future perspectives

2018 ◽  
Vol 16 (1) ◽  
pp. e09R01 ◽  
Author(s):  
Sandra Stamenković ◽  
Vladimir Beškoski ◽  
Ivana Karabegović ◽  
Miodrag Lazić ◽  
Nada Nikolić
Keyword(s):  
Specific Effect ◽  
Positive Influence ◽  
Poor Quality ◽  
Microbial Inoculants ◽  
Beneficial Effects ◽  
Mass Multiplication ◽  
Plant Growth Promoting ◽  
Growth Promoting ◽  
Microbial Fertilizers

Plant growth promoting microorganisms (PGPM) are an important group of microbial inoculants, which exist in rhizosphere and have the ability to inhabit the root of the plants and improve their development. Their positive influence is achieved through solubilization of phosphorus, nitrogen fixation, production of plant nutrients and phytohormones, protection from pathogens and recovery from stressful environmental conditions. This is the main reason for the increasing usage of many PGPMs which formulations are commonly known as microbial fertilizers. Microbial fertilizers represent an attractive replacement for chemical fertilizers that are polluting the environment. They are used to increase the crop yield in an eco-friendly way while relying on sustainable agriculture principles. The biggest problem nowadays is the very poor quality of such products, which results in the lack of confidence and makes commercialization much more difficult. In order to increase production and hence the commercialization of microbial fertilizers, desired quality and stability should be achieved. For this reason, many researches are done in this particular field. In order to develop an optimal product, it is important to know and understand the process, including the physiology of bacteria and plants, mass multiplication technological processes as well as the existing formulation and the specific effect on the desired plant. For this purpose, the aim of this review is to indicate the significance of microbial fertilizers and their beneficial effects on the plants, as well as to give a brief survey of the different aspects of production processes with a special emphasis on mass multiplication.

scholarly journals Моніторинг безпечності та якості продуктів забою свиней, отриманих в умовах Одеської області

2017 ◽  
Vol 19 (77) ◽  
pp. 148-152
Author(s):  
M.S. Khimich ◽  
A.M. Gorobei ◽  
F.V. Kozulin ◽  
V.V. Zhekov
Keyword(s):  
Poor Quality ◽  
Modern Technology ◽  
Post Mortem ◽  
Food Markets ◽  
Preventive Approach ◽  
Invasive Diseases ◽  
Livestock Products ◽  
Pig Carcasses

In accordance with the modern requirements of the international control system (HACCP), it is necessary to abandon the control of the final product for the purpose of identifying shortcomings, but to proceed to the preventive approach of eliminating potential sources of danger at all stages of production. A step-by-step system for controlling the quality of livestock products, in particular meat, in the absence of modern technology of primary processing and quality veterinary and sanitary control, is complex. Therefore, to ensure the safety and quality of meat, it is necessary to improve and scientifically justify the methods of their control, bringing it closer to international requirements. The purpose of our research was to monitor the safety and quality of slaughter products for pigs obtained in the conditions of the Odessa region. The material of the research was reporting on veterinary medicine (Form No. 6-vet., Form No. 5- vet., Form No. 2a-vet.) In the districts of the Odessa region for 2014–2016, which was processed statistically. The analysis has established that for 2014–2016. In the investigated areas, only 28846 pigs were slaughtered, and 74.48% of the slaughter took place. It was found that according to the results of the pre-blast inspection and post-mortem veterinary examination of pig carcasses, 83 cases of diseases, echinococcosis, were detected during the reporting period. For the reporting years, 17103 carcasses of pigs were supplied to the agro-food markets of the study areas. Employees of laboratories for veterinary and sanitary examination in the markets conducted 65417 laboratory studies: all carcasses of pigs were examined organoleptically (including cooking breakdown), trichinoscopy and studies for phychosis and other parasitic diseases were performed; The determination of physicochemical parameters and bacterioscopy of mascara were carried out in individual cases; radiological and other studies were not conducted. During the veterinary and sanitary examination, 662 cases of diseases were detected in the laboratories of veterinary and sanitary examination in the markets: 65 cases of non-communicable diseases and 597 cases of invasive diseases. And draws attention to the fact that 99.83% of the identified invasive diseases was echinococcosis. Comparative analysis of the results on the detection of cases of echinococcosis, depending on the location of Veterinary control, found significant discrepancies– after post-mortem veterinary and sanitary control, only 7.26–26.27% of cases are detected, in comparison with the results of veterinary and sanitary examination of slaughter products in laboratories for veterinary and sanitary examination In the markets. This imbalance, in our opinion, can be related to homestead slaughter and poor quality post-mortem Veterinary control during it. Summarizing the obtained results of the analysis, we can conclude that the management system for the safety and quality of slaughter products in pigs in the regions of the Odessa region at the present stage still relies on the analysis of the final product, not taking into account the preventive approach.

scholarly journals Design and implementation of fish freshness detection algorithm using deep learning

2021 ◽  
Vol 944 (1) ◽  
pp. 012007
Author(s):  
D F Anas ◽  
I Jaya ◽  
Nurjanah
Keyword(s):  
Detection Algorithm ◽  
Poor Quality ◽  
Fresh Fish ◽  
Traditional Markets ◽  
Organoleptic Test ◽  
Fish Samples ◽  
Medium Quality ◽  
Euthynnus Affinis

Abstract Organoleptic assessment of fresh fish includes specifications for the quality of the eyes, gills, mucus, odor, texture and flesh (color and appearance). However, not everyone has knowledge about it. This research uses the tiny yolov2 to facilitate the determination of fish freshness levels (good quality, medium quality, poor quality) correctly and fast. There are a few stages in this research, included organoleptic test accompanied by taking fish eye image dataset every hour, processing organoleptic test data labeling, training, and validation. There are three types of fish used, consists of Rastrelliger, Euthynnus affinis, and Chanos chanos. Detection of fish freshness level for three species was successfully carried out with the result of average precision is 72.9%, average recall is 57.5%, and accuracy is 57.5%. The factors that affect the prediction results in this study is the collection of datasets before the training process is carried out consisting of fish samples obtained from traditional markets, which are considered inadequate so that it affects the organoleptic test process itself, the organoleptic test that was carried out as a reference for image sorting was considered inaccurate because it used less than 30 untrained panelists and dataset imbalance.

Assessment of vibrocompaction quality of concrete mixtures for making reinforced-concrete products

2021 ◽  
pp. 53-56
Author(s):  
B. V. Gusev ◽  
◽  
L. M. Dobshits ◽  
A. A. Nikolaeva ◽  
◽  
...  
Keyword(s):  
Reinforced Concrete ◽  
Poor Quality ◽  
Concrete Mixture ◽  
Uneven Distribution ◽  
Concrete Mixtures

The paper is devoted to determination of influence of vibration influence parameters at compaction of hard concrete mixtures designed for making reinforced-concrete sleepers. At poor quality compaction of a concrete mixture there is an uneven distribution of physical and mechanical indicators by length and width of products that negatively affects their future operation. The paper presents studies on determination of vibration influence parameters at compaction of concrete mixtures and provides recommendations on improvement of operation of existing technological lines.

scholarly journals Full crystal structure, hydrogen bonding and spectroscopic, mechanical and thermodynamic properties of mineral uranopilite

RSC Advances ◽  
2020 ◽  
Vol 10 (53) ◽  
pp. 31947-31960 ◽  
Author(s):  
Francisco Colmenero ◽  
Jakub Plášil ◽  
Vicente Timón ◽  
Jiří Čejka
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonding ◽  
Thermodynamic Properties ◽  
Poor Quality ◽  
X Ray Diffraction ◽  
Uranyl Sulfate ◽  
X Ray ◽  
The Poor

The determination of the full crystal structure of the uranyl sulfate mineral uranopilite, including the positions of the H atoms in the corresponding unit cell, has not been feasible to date due to the poor quality of its X-ray diffraction pattern.

Colorimetric Assay of Strychnine and Brucine in Nux Vomica

1975 ◽  
Vol 58 (1) ◽  
pp. 85-87
Author(s):  
Mohamed S Karawya ◽  
Mohamed S Hifnawy ◽  
Hasan S Dahawi
Keyword(s):  
Nitric Acid ◽  
Thin Layer ◽  
Stannous Chloride ◽  
Colorimetric Assay ◽  
Chromatographic Technique ◽  
Colorimetric Analysis ◽  
Violet Color ◽  
Colorimetric Methods

Abstract Two colorimetric methods are described for the estimation of strychnine and brucine in nux vomica. The first is a modification of the Karawya and Ghourab method for the determination of strychnine, in which the sensitivity of the color is increased by changing certain conditions of the method. The second was developed for the determination of brucine and is based on measuring the intensity of the violet color produced by treating brucine with nitric acid and methanolic stannous chloride. In the presence of large amounts of strychnine, brucine is isolated prior to colorimetric analysis by a quantitative thin layer chromatographic technique.

scholarly journals CAUSES OF POOR QUALITY CASING OF DIRECTIONAL WELLS AT THE DRILLING DEPARTMENT «UKRBURGAZ» AND METODS FOR THEIR ELIMINATION

2019 ◽  
pp. 26-35
Author(s):  
I. M. Kovbasiuk ◽  
O. B. Martsynkiv ◽  
B. O. Martsynkiv
Keyword(s):  
Field Data ◽  
Drilling Fluid ◽  
Field Research ◽  
Poor Quality ◽  
Design Parameters ◽  
Geological Conditions ◽  
Casing Strength

The analysis of modern studies and field data relating to directional wells casing at the enterprises of “Ukrburgas” drilling company has been carried out in the article. In particular, complications with casing strings, which happened when casing directional wells at these enterprises, data on the non-admission of casing strings to the total depth, a brief description of works aimed at restoring the quality of well casing, are considered. Main reasons of complications, damages and failures during well casing process have been determined. It has been found out that casing string failures mostly happened in the areas of intensive wellbore deviation. The reasons of directional wells poor quality casing taking into account the results of new theoretical, experimental and field research have been systemized. Cases of wells poor quality casing are supposed to be divided into two groups: 1) casing strings damage, 2) non-admission of casing strings to the total depth and violation of string integrity. Each of the groups is classified in accordance with the types of poor casing. The main reason of directional wells poor quality casing are failures caused by wrong casing strength calculations, violation of casing well technology, casing strings wear, mining and geological conditions. The non-admission of the columns to the total depth and poor-quality joining of sections are minor, which arise due to the low passability of the well, inaccurate determination of the depth of the well, geological conditions, etc. Measures to prevent complications, damages and accidents during well casing, in particular, work on forming the necessary wellbore profile, maintaining the design parameters of drilling fluid, and compliance with the requirements of enterprise standards during preparation works, lowering, cementing and final casing works have been worked out.

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