scholarly journals Industrial Practice for Reducing Defective Sterile Milk Products Produced Using Overpressure Rotary Retorts

2021 ◽  
Vol 10 (1) ◽  
pp. 221-232
Author(s):  
Muhamad Wahyu Pamuji ◽  
Eko Hari Purnomo ◽  
Azis Boing Sitanggang
Keyword(s):  
Internal Pressure ◽  
Pressure Difference ◽  
External Pressure ◽  
Scale Production ◽  
Product Packaging ◽  
Pareto Analysis ◽  
Root Cause ◽  
Major Factors ◽  
Product Sales ◽  
Sterilized Milk

Indonesian consumers are fond of commercially sterilized milk as indicated by increasing product sales. High demand for products intensifies the need to increase productivity, generally achieved by minimizing product defects. This study aimed to reduce the number of defects in commercially sterilized milk produced using overpressure rotary retorts. Based on Pareto analysis, the percentage of defective products was 5.14% of which 2.37% were dented bottles. A cause-effect diagram (Ishikawa Diagram) was used to find the root cause of dented bottles. The pressure difference between the retort chamber (external pressure) and inside the product packaging (internal pressure), and the number of bottles stacked inside the retort basket (bottle density) were found as major factors for causing dented bottles. The internal pressure was 1.20 bar higher than the external pressure. By reducing the pressure difference to 0.40 bar, the percentage of dented bottles could be reduced to 0.79%. Applying the low-est bottle density (73% of the retort basket area occupied by bottles) during the sterilization process could decrease the number of dented bottles, however, it also increased the appearance of striped lids. The best conditions for sterilization (pressure difference = 0.40 bar; number of bottles/basket = 1938 bottles) which were used in the three-month full-scale production trial reduced the percentage of defective products from 5.14% to 2.24% of which 0.76% were dented bottles. Setting the retort pressure at 2.80 bar could avoid 52,920 defective bottles of commercially sterilized products per month.

scholarly journals Progress in Research on Carbon Nanotubes Reinforced Cementitious Composites

2015 ◽  
Vol 2015 ◽  
pp. 1-16 ◽  
Author(s):  
Qinghua Li ◽  
Jintao Liu ◽  
Shilang Xu
Keyword(s):  
Carbon Nanotubes ◽  
Large Scale ◽  
High Strength ◽  
Cementitious Composites ◽  
Scale Production ◽  
Multiwalled Carbon ◽  
Factors Affecting ◽  
Environment And Health ◽  
Research Activities ◽  
Major Factors

As one-dimensional (1D) nanofiber, carbon nanotubes (CNTs) have been widely used to improve the performance of nanocomposites due to their high strength, small dimensions, and remarkable physical properties. Progress in the field of CNTs presents a potential opportunity to enhance cementitious composites at the nanoscale. In this review, current research activities and key advances on multiwalled carbon nanotubes (MWCNTs) reinforced cementitious composites are summarized, including the effect of MWCNTs on modulus of elasticity, porosity, fracture, and mechanical and microstructure properties of cement-based composites. The issues about the improvement mechanisms, MWCNTs dispersion methods, and the major factors affecting the mechanical properties of composites are discussed. In addition, large-scale production methods of MWCNTs and the effects of CNTs on environment and health are also summarized.

Fitness for Service Assessments of Bulging and Out-of-Round Structures

2004 ◽  
Author(s):  
Peter Carter ◽  
D. L. Marriott ◽  
M. J. Swindeman
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Internal Pressure ◽  
Structural Model ◽  
External Pressure ◽  
Element Analysis ◽  
Structural Imperfection ◽  
Level 2

This paper examines techniques for the evaluation of two kinds of structural imperfection, namely bulging subject to internal pressure, and out-of-round imperfections subject to external pressure, with and without creep. Comparisons between comprehensive finite element analysis and API 579 Level 2 techniques are made. It is recommended that structural, as opposed to material, failures such as these should be assessed with a structural model that explicitly represents the defect.

scholarly journals Bioreactor Operating Strategies for Improved Polyhydroxyalkanoate (PHA) Productivity

Polymers ◽  
2018 ◽  
Vol 10 (11) ◽  
pp. 1197 ◽  
Author(s):  
Warren Blunt ◽  
David Levin ◽  
Nazim Cicek
Keyword(s):  
Production Costs ◽  
Scale Production ◽  
Fed Batch ◽  
Continuous Bioreactor ◽  
Carbon Substrates ◽  
Pure Cultures ◽  
High Production ◽  
Operating Strategies ◽  
Major Factors ◽  
Industrial Scale Production

Microbial polyhydroxyalkanoates (PHAs) are promising biodegradable polymers that may alleviate some of the environmental burden of petroleum-derived polymers. The requirements for carbon substrates and energy for bioreactor operations are major factors contributing to the high production costs and environmental impact of PHAs. Improving the process productivity is an important aspect of cost reduction, which has been attempted using a variety of fed-batch, continuous, and semi-continuous bioreactor systems, with variable results. The purpose of this review is to summarize the bioreactor operations targeting high PHA productivity using pure cultures. The highest volumetric PHA productivity was reported more than 20 years ago for poly(3-hydroxybutryate) (PHB) production from sucrose (5.1 g L−1 h−1). In the time since, similar results have not been achieved on a scale of more than 100 L. More recently, a number fed-batch and semi-continuous (cyclic) bioreactor operation strategies have reported reasonably high productivities (1 g L−1 h−1 to 2 g L−1 h−1) under more realistic conditions for pilot or industrial-scale production, including the utilization of lower-cost waste carbon substrates and atmospheric air as the aeration medium, as well as cultivation under non-sterile conditions. Little development has occurred in the area of fully continuously fed bioreactor systems over the last eight years.

Study on the Preparation and Amplification Experiment of Al-Pillared Montmorillonite

2011 ◽  
Vol 396-398 ◽  
pp. 1440-1445
Author(s):  
Gang Chen ◽  
Chun Jie Yan ◽  
Jin Feng Shou ◽  
Juan Mei ◽  
Nan Nan Chen
Keyword(s):  
Pilot Scale ◽  
Micropore Volume ◽  
Bet Surface Area ◽  
Scale Production ◽  
Mass Ratio ◽  
Optimum Conditions ◽  
Technical Parameters ◽  
Pillared Montmorillonite ◽  
Commercial Aluminium ◽  
Major Factors

A method of preparation and pilot scale production of Al-pillared montmorillonite has been developed. There is a minimum of time and amount of liquid. And it is simpler to operate than the conventional method of pillaring by using the commercial aluminium hydroxychloride(PAC) powder as the pillaring agent. Here, the effect of the major factors such as the mass ratio of PAC to montmorillonite, the concentration of montmorillonite slurry, the sodium agent pretreatment, washing times and drying temperature on the Al-pillared montmorillonite are studied. Then the optimal technical parameters is determined. XRD, BET surface area and micropore volume are applied in order to study the structure and properties of Al-pillared montmorillonite. As a result, the amplification experiment under the optimum conditions shows that this method offers the potential for extension to an industrial-scale process.

scholarly journals IMPLEMENTASI STRATEGI KEUNGGULAN BERSAING DAN PENDAMPINGAN REDESAIN KEMASAN DALAM MENINGKATKAN PENJUALAN PADA UKM RITEL DI TANGERANG

2020 ◽  
Vol 3 (1) ◽  
Author(s):  
Sanny Ekawati ◽  
Nur Hidayah ◽  
Purwanto Purwanto
Keyword(s):  
Competitive Advantage ◽  
Business Environment ◽  
Product Packaging ◽  
Doing Business ◽  
Business Excellence ◽  
Retail Strategy ◽  
Retail Business ◽  
The Many ◽  
Product Sales ◽  
Internal And External Factors

The purpose of the activity is to implement a competitive advantage strategy in the retail business and assistance in making product packaging in increasing retail business sales in the Old Tangerang market. PKM activity is an inspiration from the many retail stores that are not able to increase sales, which is due to competitive advantage strategies that have not been carried out optimally. Given the retail strategy in building a competitive advantage is very necessary for a retailer. The location of the traditional market was chosen because it still needs help from various parties. Including from educational institutions. For this activity partners were chosen because of limited competitive advantage and limited knowledge of the strategy of excellence. In addition, the limitations of partners to build excellence, in assessing internal and external factors in the business environment through SWOT, are indispensable to assist retailers in assessing business excellence. Furthermore, to improve product sales value, better product packaging is needed, this has not been done by partners. The method offered in this activity is the provision of knowledge of retail business excellence strategies, SWOT strategies and packaging design in the form of FGDs, socialization and training. While the assistance is done by making product packaging that is more environmentally friendly. Through this activity will help overcome the problems of partners in doing business better than competitors. Thus the hope can help partners in increasing sales.ABSTRAK:Tujuan kegiatan adalah mengimplementasikan strategi keunggulan bersaing usaha ritel dan pendampingan membuat pengemasan produk dalam meninggkatkan penjualan Usaha Ritel di pasar Lama Tangerang. Kegiatan PKM merupakan inspirasi dari banyaknya toko ritel yang tidak mampu meningkatkan penjulan, yang dikarenakan strategi keunggulan bersaing yang belum dilakukan secara optimal. Mengingat strategi eceran dalam membangun keunggulan bersaing sangatlah diperlukan bagi seorang pengecer. Dipilih lokasi pasar tradisional karena masih sangat membutuhkan bantuan dari berbagai pihak. Termasuk dari lembaga pendidikan. Untuk kegiatn ini mitra yang dipilih karena masih lemahnya keunggulan bersaing, lemahnya pengetahuan akan strategi keunggulan. Selain itu keterbatasan mitra membangun keunggulan, dalam menilai faktor internal dan eksternal di lingkungan usaha melalui SWOT, yang sangat diperlukan untuk membantu peritel dalam menilai keunggulan usaha. Selanjutnya untuk meningkatkan nilai jual produk diperlukan kemasan produk yang lebih baik, hal ini belum dilakukan mitra. Metode yang ditawarkan dalam kegiatan ini adalah pemberian pengetahuan akan strategi keunggulan usaha ritel, strategi SWOT dan desain kemasan dalam bentuk FGD, sosialisasi dan pelatihan. Sedangkan pendampingan dilakukan dengan membuat kemasan produk yang lebih ramah lingkungan. Melalui kegiatan ini akan membantu mengatasi persoalan mitra dalam melakukan usaha secara lebih baik dibandingkan pesaing. Dengan demikian harapannya dapat membantu mitra dalam meningkatkan penjualan

Dependence of Transcutaneous Oxygen Tension on Local Arteriovenous Pressure Gradient in Normal Subjects

1981 ◽  
Vol 60 (5) ◽  
pp. 499-506 ◽  
Author(s):  
C. R. Wyss ◽  
F. A. Matsen ◽  
Racheal V. King ◽  
C. W. Simmons ◽  
E. M. Burgess
Keyword(s):  
Oxygen Tension ◽  
Pressure Difference ◽  
Venous Blood ◽  
Venous Drainage ◽  
Normal Subjects ◽  
External Pressure ◽  
Transcutaneous Oxygen Tension ◽  
Transcutaneous Oxygen ◽  
Normal Men ◽  
The Relationship

1. We studied the relationship between trans-cutaneous oxygen tension at the foot and local arteriovenous pressure difference in 15 normal men and women; arteriovenous pressure difference was varied by changing the height of the foot with respect to the heart and by applying external pressure to the foot. 2. Control transcutaneous oxygen tension was 67 ± 9 sd mmHg (8.9 ± 1.2 kPa) at a control arteriovenous pressure difference of 80 ± 6 sd mmHg (10.6 ± 0.8 kPa). 3. In every subject transcutaneous oxygen tension fell non-linearly with a decrease in arteriovenous pressure difference; transcutaneous oxygen tension was relatively insensitive to changes in arteriovenous pressure difference when arteriovenous pressure difference was high, but always fell sharply to zero at some positive arteriovenous pressure difference [range 13-34 mmHg (1.7-4.5 kPa)]. 4. An analysis of the data indicated that transcutaneous oxygen tension varied with arteriovenous pressure difference approximately as the oxygen tension of cutaneous venous blood under the sensor varied (in the absence of changes in cutaneous vascular resistance and oxygen consumption). 5. This analysis was supported by studies in three subjects in whom the oxygen tension of superficial venous drainage from a warmed hand or foot was measured along with Transcutaneous oxygen tension while arteriovenous pressure difference was varied.

A Theoretical and Experimental Analysis of the Bending Behavior of Unbonded Flexible Pipes

2014 ◽  
Author(s):  
Tatiana Vargas-Londoño ◽  
José Renato M. de Sousa ◽  
Carlos Magluta ◽  
Ney Roitman
Keyword(s):  
Internal Pressure ◽  
Cross Section ◽  
Structural Response ◽  
Experimental Tests ◽  
Theoretical Models ◽  
External Pressure ◽  
Local Behavior ◽  
Flexible Pipes ◽  
Floating System ◽  
Bending Loads

Due to its compound cross-section, the prediction of the structural response of flexible pipes to loads such as their self-weight, internal and external pressure, movements imposed by the floating system and environmental loads such as currents, waves and wind is quite complex. All these loads generate stresses and strains in the cross section of the pipe that have to be properly evaluated in order to ensure integrity of the line. Research has been done on the local behavior of flexible pipes under combined axisymmetric loads as well as under bending loads. However, there is a lack of research combining both axisymmetric and bending loads, as also in the study of the strains in the tensile amour layers of the pipes, aspects which are important for the calibration of theoretical models to predict such behavior. Based on that, this study aims to evaluate the local behavior of flexible pipes under combinations of axisymmetric (tension, and internal pressure) and bending loads via a series of experimental tests in a 9.13″ I.D pipe. In the experimental tests, the behavior of the pipe was studied for three load combinations: i) bending combined with tension; ii) bending combined with internal pressure; and iii) bending combined with tension and internal pressure. Based on these tests, the authors obtained the strains in the tensile armor layer, axial elongation due to tension, axial reaction forces due to internal pressure, and deflection due to bending. These measurements were used to calibrate a theoretical model devoted to simulate the pipe’s response, getting accurate results for stiffness and stresses of the pipe in each scenario.

A Conceptual Model of Green HRM Adoption Towards Sustainability in Hospitality Industry

2019 ◽  
pp. 400-421 ◽  
Author(s):  
Yusmani Mohd Yusoff ◽  
Mehran Nejati
Keyword(s):  
Human Resource Management ◽  
Internal Pressure ◽  
Financial Performance ◽  
Human Resource ◽  
Hospitality Industry ◽  
External Pressure ◽  
Resource Based View ◽  
Proposed Model ◽  
Level Of Understanding ◽  
Green Human Resource Management

This chapter seeks to provide a better understanding on the predictors of green human resource management which can result in improved environmental and financial performance across hospitality industry. The proposed model has been constructed from the perspective of external pressure (i.e., normative) and internal pressure (manager's environmental concerns) by using the Institutional Theory and Resource Based View Theory. The chapter examines the antecedents of sustainability in hospitality industry in terms of improved financial and environmental performance. It therefore expands the level of understanding on mechanisms which leads to corporation sustainability. While the chapter is written with a focus on hospitality industry, the proposed model is applicable to corporations across other sectors.

On the response and prediction of multi-layered flexible riser under combined load conditions

2019 ◽  
Vol 36 (8) ◽  
pp. 2507-2529 ◽  
Author(s):  
Mengsha Liu ◽  
J.Y. Li ◽  
Lixin Chen ◽  
J.S. Ju
Keyword(s):  
Numerical Simulation ◽  
Internal Pressure ◽  
Internal Force ◽  
External Pressure ◽  
Prediction Methods ◽  
Flexible Riser ◽  
Content Type ◽  
Combined Load ◽  
Simulation Results ◽  
Load Conditions

Purpose The internal force is more complicated in a combined load case than in a single load case, and the influence of the combined load on the stress cannot be neglected. The purpose of this paper is to study the mechanical behavior of the flexible riser under combined load conditions of tension and internal pressure or external pressure. Design/methodology/approach The mechanical behavior of the flexible riser under combined load conditions is studied by numerical simulation with a nine-layer detailed finite element model. The layers of flexible riser are modeled separately, and the interactions between layers have been taken into consideration in numerical simulation. Findings Under tension and internal pressure or external pressure, the pressure armor will bear extra external pressure because of the squeezing actions between layers caused by tension, and the extra external pressure will increase proportionately with the increase of the tension. Under internal pressure and tension, the internal stress for tension armor was nearly unchanged compared to that under unique tension load, whereas under external pressure and tension, the change of internal stress for tension armor was significant. Prediction methods of internal force for pressure armor and tension armor under pressure and tension are given, and the result from the formula agrees well with the simulation results. Originality/value The prediction methods on the internal force of flexible riser proposed in this study are proven accurate, with numerical simulation results, and the prediction methods are convenient for engineering applications.

Ethical problems related to intravenous fluids in nursing homes

2014 ◽  
Vol 21 (8) ◽  
pp. 890-901 ◽  
Author(s):  
May-Elin T Horntvedt ◽  
Maria Romøren ◽  
Betty-Ann Solvoll
Keyword(s):  
Decision Making ◽  
Nursing Homes ◽  
Internal Pressure ◽  
Collaborative Research ◽  
Ethical Problem ◽  
Organizational Factors ◽  
External Pressure ◽  
Intravenous Fluids ◽  
Research Project ◽  
Ethical Problems

Background: Intravenous fluids and/or antibiotics are applied to only a limited extent in Norwegian nursing homes, and the patients are often sent to hospital in these situations. A transfer and a stay in hospital may be unnecessary strains for frail older patients. Given this background, a collaborative research project was initiated in a Norwegian county in 2009. A teaching programme was developed, which aimed to strengthen the awareness of ethics, assessments and practical procedures related to intravenous fluid and/or antibiotics among healthcare professionals. Objectives: This qualitative study aimed to increase our knowledge of the ethical problems experienced by nursing home nurses in situations related to the administration of intravenous fluids and/or antibiotics. Research design: An exploratory design was used, and five focus group interviews were conducted with 26 registered nurses. A hermeneutic analytic approach was applied. Ethical considerations: This study was reported to the Norwegian Social Science Data Services in May 2010. The Regional Committee for Medical and Health Research Ethics approved the collaborative research project. Findings: The analysis showed that the nurses experienced difficult decision-making situations, which were interpreted as external pressure and internal pressure. External pressure emerged in interactions with patients and relatives. Organizational factors were also interpreted as external pressure. Internal pressure was interpreted as the nurses’ experience of feeling inadequate in situations where it was difficult to protect the dignity of patients. Discussion: These findings correspond with international studies, which show that ethical problems often arise during decision-making situations. Conclusion: In agreement with the definition of an ethical problem, we found that the nurses experienced uncertainty and disagreements about how situations should be managed. External and internal pressures related to intravenous fluids and/or antibiotics in nursing homes have not been reported in previous studies. Thus, these findings merit further exploration.

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