Storage time as a factor in the physicomechanical properties of viscose rayon

1978 ◽  
Vol 9 (4) ◽  
pp. 387-389
Author(s):  
L. L. Agafonova ◽  
Z. G. Serebryakova ◽  
R. A. Glavochevskaya ◽  
A. Ya. Lyalyushkin
Keyword(s):  
Viscose Rayon ◽  
Storage Time ◽  
Physicomechanical Properties

Stretching conditions and relaxation processes as factors in the physicomechanical properties of high-modulus viscose rayon staple fibre

1980 ◽  
Vol 11 (3) ◽  
pp. 218-221
Author(s):  
V. V. Skorobogatykh ◽  
I. Kh. Natanson ◽  
E. V. Karchevskaya ◽  
A. V. Ryabushkin ◽  
A. T. Serkov
Keyword(s):  
Viscose Rayon ◽  
Physicomechanical Properties ◽  
Staple Fibre ◽  
Relaxation Processes ◽  
High Modulus ◽  
Rayon Staple

scholarly journals Physicomechanical properties of different nanohybrid composites after aging: color stability, flexural strength, and microhardness

2019 ◽  
Vol 18 ◽  
pp. e191395
Author(s):  
Rafaella Caramori Saab ◽  
Adriana Osten Costacurta ◽  
Marina Samara Baechtold ◽  
Rafaella Ronchi Zinelli ◽  
Ana Beatriz Franco Fernandes ◽  
...  
Keyword(s):  
Flexural Strength ◽  
Repeated Measures ◽  
Storage Time ◽  
Hybrid Composites ◽  
Color Stability ◽  
Physicomechanical Properties ◽  
Composite Resins ◽  
Bending Test ◽  
Flat Surfaces ◽  
Three Point Bending

Aim: To evaluate the physicomechanical properties of different hybrid composites (Charisma Diamond - CD, Aura - AU, NT Premium - NT, Opallis - OP, Filtek Z250 – Z250) after 6 months of aging in distilled water. Methods: Discs were fabricated and color measurements were performed after 24 hours and at 7, 30, and 180 days. Flexural strength was determined using the three-point bending test. For the microhardness test, the specimens were flattened to obtain polished and flat surfaces and indentations. The results for ∆E and microhardness were analyzed by two-way repeated-measures ANOVA and Tukey’s HSD test. The flexural strength results were analyzed by two-way ANOVA and Tukey’s test (α=0.05). Results: The ∆E values for composite resins varied in the following order: CD (3.54)a < Z250 (4.70)ab < AU (4.95)ab < OP (5.20)ab < NT (6.23)b. ∆E values were lower for 24 h (3.84)a < 7 days (4.43)ab < 30 days (4.93)b. The highest values were observed after 180 days (ΔE = 6.54)c. The flexural strength of composite resins varied in the following order: CD (89.17 MPa)a < Z250 (73.06 MPa)b < OP (60.30 MPa)c < NT (51.28 MPa)c < AU (23.77 MPa)d. Flexural strength values were significantly higher for 24 h (68.62 MPa)a < 180 days (51.40 MPa)b. The microhardness of composite resins varied in the following order: Z250 (112.05)a < CD (102.15)ab < OP (92.04)bc < NT (87.77)d < AU (87.68)d. Microhardness was significantly higher for 180 days (113.44)a < 24 h (78.21)b. Conclusion: The microhybrid (Z250) and one of the nanohybrid composites (CD) performed better. The color stability and flexural strength of all tested composites decreased with storage time.

The Sterility of Reusable Surgical Instruments with Pouches Packaging on One of the Private Hospital in Bandung

2017 ◽  
Vol 8 (2) ◽  
Author(s):  
Kurniawansyah I. S. ◽  
Mita S. R. ◽  
Najla E. ◽  
Nindayani E.
Keyword(s):  
Storage Time ◽  
Private Hospital ◽  
Surgical Instruments ◽  
Healthcare Associated Infection ◽  
Sterility Testing ◽  
Reusable Instruments ◽  
Healthcare Associated ◽  
The Relationship ◽  
Common Infection ◽  
Long Storage

Healthcare associated infection is one of the common infection that happens in Indonesia. One form control to prevent healthcare associated infection is the sterilization process of the materials and medical instruments that used for taking care of patients. At the private hospital whereas a place of research, there’s never been done the study of sterility test for reusable instrument with pouches, based on previous studies showed that 8 sets from 40 sets of reusable instrument with linen were not sterile moreover there were positively influence from the amount of time to the sterility of reusable instrument. The purpose of these studies was to determining the relationship between a long storage time and the sterility of reusable instruments with pouches. The method that used in this study was the sterility testing of reusable instrument with pouches which were stored in a central operations room storage with a long storage time of 1 and 2 months. From 30 reusable instruments with pouches which were stored for nine months there were 5 instruments were not sterile. The results of statistic analysis showed that the amount of storage time not significantly associated to the sterility of reusable instrument with pouches in the operating room central storage space.

THE INFLUENCE OF STORAGE TIME ON THE RHEOLOGY AND PH OF BENTONITE SUSPENSIONS

2019 ◽  
Author(s):  
Elis Marina Schvan Wendt ◽  
Leonardo Banaszevski Gomes ◽  
Rubens Rosario Fernandes ◽  
Admilson Franco
Keyword(s):  
Storage Time

Study and Evaluation of Stored Drinking Water Characteristics Using Three Types of Roof Water Tanks in Kirkuk Governorate, Iraq

2019 ◽  
Vol 7 (1) ◽  
pp. 11-16
Author(s):  
Abdulkhaleq K Mahmood ◽  
Ali A Kamal ◽  
Ako R Hama
Keyword(s):  
Drinking Water ◽  
Storage Time ◽  
Total Dissolved Solids ◽  
Water Tank ◽  
Dissolved Solids ◽  
Water Characteristics ◽  
Three Samples ◽  
Water Metal ◽  
Water Tanks ◽  
Better Than

The scarcity of safe drinking water is one of the problems faced by the majority of cities in the world. Kirkuk city is one of these cities, which suffer from a shortage of drinking water. People have adopted the use of different rooftop tanks to overcome this problem. This research focuses on studying the effect of storage time on the five main characteristics of drinking water, which include, acid index (pH), electrical conductivity (EC), total suspended solids (TSS), total dissolved solids (TDS), and turbidity (Tr). Three types of tanks were used predominantly (galvanized metal, plastic, and aluminum tanks). By analyzing the results, the characteristics of three samples of municipal source water obtained. Three samples were taken from each tank at different periods (4, 8, and 12 days). The results showed that the storage time affected the characteristics of drinking water. These characteristics differed from one tank to another. Metal tanks showed an increase in total dissolved solids, due to the evaporation process, even as plastic and aluminum tanks showed an increase in pH. The properties of all storage water tanks changed with times, but overall, the results were within the Iraqi limitation for drinking water. It was not easy to only depend on the results of this study to believe that any one type of water tank was better than the other, as the values of most of the variables studied had varied from one type to other. However, many studies have indicated a number of health risks, and most significantly with regard to plastic tanks, which are said to contain dangerous organic compounds that can be transferred to water. Metal tanks can cause zinc leakage, caused by a number of environmental factors at high levels. Aluminum tanks also can have an effect on the water in tanks.

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