Evaluation of the Quality of Bath Cosmetics in Powder Form Depending on the Selection of Fillers

2021 ◽  
Vol 58 (5) ◽  
pp. 334-341
Author(s):  
Ilona Podkowa-Zawadzka ◽  
Tomasz Wasilewski ◽  
Małgorzata Zięba
Keyword(s):  
Functional Properties ◽  
Microcrystalline Cellulose ◽  
Powder Form ◽  
Foaming Ability ◽  
The Stability ◽  
Selection Of

Abstract The aim of the study was to evaluate the effects of hydrophilic microcrystalline cellulose, hydrophobic talc and mixtures of cellulose and talc when used as fillers in powdered bath cosmetics. A number of model formulations were developed that contained fillers in different compositions. Prototypical formulations were prepared and evaluated for their functional properties and skin-drying effect. An increase in the concentration of talc was found to reduce the ability of the formulations to emulsify fatty soils and, consequently, decrease the skin-drying effect after washing. Another result of the study is that a high content of talc does not significantly impair the foaming ability, and the presence of talc improves the stability of generated foam.

scholarly journals Development of protocol for screening of formulation attributes and the assessment of common quality problems in oleuropein loaded nanostructured lipid carriers

2019 ◽  
Vol 10 (2) ◽  
pp. 1382-1391 ◽  
Author(s):  
Sucharitha P ◽  
Satyanarayana SV ◽  
Bhaskar Reddy K
Keyword(s):  
Thermal Analysis ◽  
Nanostructured Lipid Carriers ◽  
Solid Lipid ◽  
Minimum Particle Size ◽  
Lipid Particles ◽  
Quality Issues ◽  
Relative Solubility ◽  
The Stability ◽  
Selection Of

The current study aims to explore and identify the screening of formulation components and evaluates the quality issues of nanostructured lipid carriers (NLCs) for the phenolic secoirodoid Oleuropein. The stepwise screening of the components for preparation of NLCs includes the selection of solid lipid, liquid lipid based on the relative solubility of Oleuropein in different lipids. Polaxomer 188 was selected as the main surfactant for the preparation of NLCs because of its good emulsification efficacy for the solid lipid liquid mix. Lecithin was used to enhance the stability of NLC. The optimized formulation was also evaluated for different quality issues. Thermal analysis by DSC revealed that the lipid particles maintained sufficiently good melting point even after nanonization. Absence of gelation and resilience for the stress provided by autoclaving further established the quality of the developed NLCs. In a nutshell, a systematic protocol was developed for designing of Oleuropein NLC with good particulate parameters of minimum particle size and maximum zeta potential with narrow polydispersity index.

Global Configuration Design of Umbilicals in Deepwater

2005 ◽  
Author(s):  
Ray Fleming ◽  
Thanos Moros ◽  
Rupak Ghosh ◽  
Kostas Lambrakos ◽  
Dave Robson
Keyword(s):  
Configuration Design ◽  
Loop Current ◽  
Global Configuration ◽  
Critical Issues ◽  
The Stability ◽  
Heave Motion ◽  
Vessel Motion ◽  
And Control ◽  
Selection Of

Global configuration design of subsea umbilical risers in deep water is a major challenge due to extreme environmental and operational requirements. The critical issues considered in design are the interference between umbilicals in the presence of strong loop and submerged current, and the on-bottom stability along with the strength and fatigue requirements. The vessel motion primarily controls the selection of the configuration, catenary or lazy wave, and the latter is an obvious choice in the presence of significant heave motion. The length and routing on the seabed ensures the on-bottom umbilical stability by dissipating the axial load through soil friction. However, the interference with other subsea components as well as the space availability can also be a governing criterion in the routing. Finally, all these design requirements must be satisfied economically from the perspective of overall cost of the project without compromising quality of the product and safety of design. This paper presents a brief outline of the global configuration design of umbilicals accounting for various design considerations. The host is a semi submersible in a water depth of 6050-ft in the Gulf of Mexico. The lazy wave configurations of the chemical injection and control umbilicals are considered for the study presented herein. The methodology of design for the global configuration is discussed considering different environmental loadings such as the 100-yr and 10-yr loop current, and 100-yr submerged current. The stability of the umbilical on the seabed is discussed on the basis of analysis results for the environmental loadings with dominant vessel motions. The phenomenon of “walking” under the influence of dynamic loading is investigated and the necessary considerations in design to prevent the umbilicals from “walking” are also discussed.

Graphene Synthesis on Ultrathin Metal Catalyst Films

2019 ◽  
Author(s):  
Kaihao Zhang ◽  
Sameh Tawfick
Keyword(s):  
Thin Films ◽  
Mechanical Performance ◽  
Metal Films ◽  
Metal Catalyst ◽  
Graphene Synthesis ◽  
Coated Metal ◽  
The Stability ◽  
Systematic Framework ◽  
Selection Of

Abstract Graphene synthesis on ultra-thin catalysts can allow the use of graphene-coated metal films in electronic applications. Graphene coated thin films are expected to offer superior mechanical performance owing to the strength of graphene. However, several factors need to be considered to assure the stability of thin films at the high temperatures required for graphene synthesis. In this work, we present a systematic framework for the selection of thin films (< 1 micron thickness) to be used as catalyst for graphene synthesis. We present our progress towards the rapid synthesis of graphene at 1100°C in less than two minutes, thus avoiding solid state dewetting. The quality of the graphene is assessed by Scanning Electron Microscopy, Raman spectroscopy and indentation. It is shown that these films exhibit higher stiffness and resistance to crack propagation.

Design and Simulation of Feedback Interference Cancellation Repeater

2012 ◽  
Vol 195-196 ◽  
pp. 666-672
Author(s):  
Fu Hong Zhang ◽  
Ye Zhu
Keyword(s):  
Output Signal ◽  
Interference Cancellation ◽  
High Gain ◽  
Signal Quality ◽  
Basic Requirement ◽  
Variable Gain ◽  
The Stability ◽  
Channel Filter ◽  
Selection Of

Stability and output signal quality are two important indicators to evaluate the performance of a repeater.A high gain is also the basic requirement of repeater.This paper first proposes a feedback interference cancellation repeater scheme, and then the scheme is simulated on simulink.The result shows that the proposed scheme is able to cancel the feedback interference and guarantee the stability and output signal quality of repeater. Besides, it confirms that stability and output signal quality have some relation with the repeater gain G, the order of estimated channel filter N and the introduced delay. Finally, the approach of variable gain effectively increases the repeater gain, and appropriate selection of the gain makes it possible to avoid the output signal quality deterioration.

scholarly journals Stability of Hydrocortisone in Oral Powder Form Compounded for Pediatric Patients in Japan

Pharmaceutics ◽  
2021 ◽  
Vol 13 (8) ◽  
pp. 1267
Author(s):  
Jumpei Saito ◽  
Nozomi Yoshikawa ◽  
Takehisa Hanawa ◽  
Ayuna Ozawa ◽  
Takahiro Matsumoto ◽  
...  
Keyword(s):  
Pediatric Patients ◽  
Degradation Products ◽  
Storage Conditions ◽  
Drug Dissolution ◽  
Powder Form ◽  
X Ray Diffraction ◽  
X Ray ◽  
Array Detection ◽  
The Stability

Hydrocortisone has been utilized in the management of adrenal insufficiency. For pediatric patients, the commercially available enteral form of hydrocortisone tablets (Cortoril®) is administered in powder form after being compounded by a pharmacist. However, the stability and quality of compounded hydrocortisone powder have not been verified. In this study, we formulated a 20 mg/g oral hydrocortisone powder by adding lactose monohydrate to crushed and filtered hydrocortisone tablets and assessed the stability and physical properties of this compounded product in polycarbonate amber bottles or coated paper packages laminated with cellophane and polyethylene. Stability was examined over 120 days in three storage conditions: closed bottle, in-use bottle, and laminated paper. Drug dissolution and powder X-ray diffraction analysis were conducted to assess its physicochemical stabilities. Validated liquid chromatography-diode array detection was used to detect and quantify hydrocortisone and its degradation products. Although impurity B (cortisone) and G (hydrocortisone-21-aldehyde) were found after 120 days of storage, no crystallographic and dissolution changes were noted. Hydrocortisone content was maintained between 90% and 110% of initial contents for 120 days at 25 ± 2 °C and 60 ± 5% relative humidity in all packaging conditions.

scholarly journals DETERMINING THE OPTIMAL DIMENSIONS FOR A MECHANISM FROM A WHEELCHAIR USING LABVIEW

2018 ◽  
Vol 6 (1) ◽  
pp. 240-247
Author(s):  
Vlad Gheorghita ◽  
Catalin Gheorghita
Keyword(s):  
Development Process ◽  
Product Development Process ◽  
Improve Performance ◽  
Software Model ◽  
Design Changes ◽  
Optimum Selection ◽  
The Stability ◽  
Experimental Values ◽  
Selection Of

The optimum selection of process parameters plays a very important role to ensure quality of product, to reduce the machining cost and to increase the productivity. Customizing a product to improve performance requires a reliable method to measure performance, in order to evaluate the effects that design changes have on them. A product development process can be thought as a sequence of activities to be completed. This paper has the purpope to analyse the influence of the parameters for equipment from a wheelchair that will overcome obstacles. The fuzzy logic is used through specialized software to optimize several parameters of the proposed mechanism with the purpose to ensure the stability through maintaining horizontality of the equipment. Comparing experimental values with those obtained through the software model, is determined whether the model used is consistent.

ON THE EXPERT’S RIGHT TO BE PRESENT AT LEGAL PROCEEDINGS

2016 ◽  
Vol 15 ◽  
pp. 163-171
Author(s):  
M. G. Shcherbakovskiy
Keyword(s):  
Initial Data ◽  
Legal Proceedings ◽  
Reliable Assessment ◽  
Data Acquiring ◽  
Selection Of

The article discusses the reasonsfor an expert to participate in legal proceedings. The gnoseological reason for that consists of the bad quality of materials subject to examination that renders the examination either completely impossible or compromises objective, reasoned and reliable assessment of the findings. The procedural reason consists ofa proscription for an expert to collect evidence himself or herself. The author investigates into the ways of how an expert can participate in legal proceedings. If the defense invites an expert to participate in the proceedings, then it is recommended that his or her involvement should be in the presence of attesting witnesses and recorded in the protocol. In the course of the legal proceedings an expert has the following tasks: adding initial data, acquiring new initial data, understanding the situation of the incident, acquiring new objects to be studied, including samples for examination. An expert’s participation in legal proceedings differs from the participation of a specialist or an examination on the scene of the incident. The author describes the tasks that an expert solves in the course of legal proceedings, the peculiarities ofan investigation experiment practices, the selection of samples for an examination, inspection, interrogation.

Criteria for evaluation of the coordinate measurements quality of parts geometric parameters at pilot-experimental production

2019 ◽  
pp. 3-8
Author(s):  
N.Yu. Bobrovskaya ◽  
M.F. Danilov
Keyword(s):  
Quality Indicators ◽  
Quality Management System ◽  
Technical Specification ◽  
Experimental Production ◽  
Technological Heredity ◽  
Coordinate Measurements ◽  
Reasonable Choice ◽  
The Stability ◽  
Geometric Elements

The criteria of the coordinate measurements quality at pilot-experimental production based on contemporary methods of quality management system and traditional methods of the measurements quality in Metrology are considered. As an additional criterion for quality of measurements, their duration is proposed. Analyzing the problem of assessing the quality of measurements, the authors pay particular attention to the role of technological heredity in the analysis of the sources of uncertainty of coordinate measurements, including not only the process of manufacturing the part, but all stages of the development of design and technological documentation. Along with such criteria as the degree of confidence in the results of measurements; the accuracy, convergence, reproducibility and speed of the results must take into account the correctness of technical specification, and such characteristics of the shape of the geometric elements to be controlled, such as flatness, roundness, cylindrical. It is noted that one of the main methods to reduce the uncertainty of coordinate measurements is to reduce the uncertainty in the initial data and measurement conditions, as well as to increase the stability of the tasks due to the reasonable choice of the basic geometric elements (measuring bases) of the part. A prerequisite for obtaining reliable quality indicators is a quantitative assessment of the conditions and organization of the measurement process. To plan and normalize the time of measurements, the authors propose to use analytical formulas, on the basis of which it is possible to perform quantitative analysis and optimization of quality indicators, including the speed of measurements.

Implementasi Voip Server Berbasis IPV6 Dengan Raspberry PI

2019 ◽  
Vol 9 (01) ◽  
pp. 47-54
Author(s):  
Rabbai San Arif ◽  
Yuli Fitrisia ◽  
Agus Urip Ari Wibowo
Keyword(s):  
Internet Protocol ◽  
Wireless Transmission ◽  
Raspberry Pi ◽  
Test Results ◽  
Average Delay ◽  
Ipv6 Network ◽  
Ip Network ◽  
Selection Of ◽  
Better Than

Voice over Internet Protocol (VoIP) is a telecommunications technology that is able to pass the communication service in Internet Protocol networks so as to allow communicating between users in an IP network. However VoIP technology still has weakness in the Quality of Service (QoS). VOPI weaknesses is affected by the selection of the physical servers used. In this research, VoIP is configured on Linux operating system with Asterisk as VoIP application server and integrated on a Raspberry Pi by using wired and wireless network as the transmission medium. Because of depletion of IPv4 capacity that can be used on the network, it needs to be applied to VoIP system using the IPv6 network protocol with supports devices. The test results by using a wired transmission medium that has obtained are the average delay is 117.851 ms, jitter is 5.796 ms, packet loss is 0.38%, throughput is 962.861 kbps, 8.33% of CPU usage and 59.33% of memory usage. The analysis shows that the wired transmission media is better than the wireless transmission media and wireless-wired.

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