Establishing Rubber Research Institute and facilitating a century of natural rubber research activity in Sri Lanka

2021 ◽  
pp. 429-462
Author(s):  
Priyani Seneviratne
Keyword(s):  
Sri Lanka ◽  
Natural Rubber ◽  
Research Activity ◽  
Research Institute

scholarly journals The microbiological investigations in the diagnostics of infections affecting human reproduction

2004 ◽  
Vol 53 (1) ◽  
pp. 16-21
Author(s):  
A. М. Savicheva ◽  
М. A. Bashmakova
Keyword(s):  
Bacterial Infections ◽  
Reproductive Tract ◽  
Clinical Manifestations ◽  
Human Reproduction ◽  
Obstetrics And Gynecology ◽  
Neonatal Infections ◽  
Research Activity ◽  
Reproductive Tract Infections ◽  
Tract Infections ◽  
Research Institute

In the article there are data concerning the development of research activity in the field of reproductive tract infections fulfilled at the laboratory of microbiology, the D.O.Ott Research Institute of Obstetrics and Gynecology, for last one hundred years. The importance of microbiological investigations in diagnosing genital, perinatal and neonatal infections is underlined. Own data on diagnostics, epidemiology, clinical manifestations of listeriosis, toxoplasmosis, viral and bacterial infections are present in the article.

Statistical Analysis of Field Experiments in Coconut Using Fewer Recordings

1993 ◽  
Vol 29 (2) ◽  
pp. 207-213
Author(s):  
T. S. G. Peiris
Keyword(s):  
Statistical Analysis ◽  
Sri Lanka ◽  
Treatment Effects ◽  
Field Experiments ◽  
Yield Data ◽  
The Cost ◽  
Term Field ◽  
Research Institute

SummaryCoconut is harvested at bimonthly intervals (six picks per year) in all field experiments carried out by the Coconut Research Institute in Sri Lanka. Because recording of individual picks is costly and time consuming, it is of interest to know whether or not recording can be restricted to fewer picks without prejudicing the results of experiments. Yield data from five long-term field experiments conducted at five different locations showed that the sum of the first, third and fifth picks could provide a good estimate of the sum of six picks. Yield recording can therefore be confined to these three picks and the cost and time of recording in an experiment reduced by 50%. These three picks can conveniently be used to assess treatment effects on total annual yield.Análisis estadístico del rendimiento de coco

Ski Rubber, Polyisoprene, Similar to Natural Rubber

1958 ◽  
Vol 31 (1) ◽  
pp. 30-43
Author(s):  
K. F. Anikanova ◽  
G. E. Betts ◽  
V. G. Zhakova ◽  
N. F. Komskaya ◽  
B. K. Karmin ◽  
...  
Keyword(s):  
Natural Rubber ◽  
Scientific Research ◽  
Scientific Research Institute ◽  
Structural Element ◽  
Molecular Weights ◽  
Synthetic Rubber ◽  
Truck Tires ◽  
Basic Work ◽  
Isoprene Rubber ◽  
Research Institute

Abstract Years of research at the S. V. Lebedev All-Union Scientific Research Institute for Synthetic Rubber have provided industry with a number of methods for making synthetic rubber from isoprene. Of all the known synthetic rubbers this comes closest to natural rubber in structure and properties; it is the best available substitute of natural rubber, possessing a high degree of elasticity and strength. The present article is a brief summary of the basic work on isoprene rubber done by the Scientific Research Institute of the Tire Industry. On the basis of this work recommendations were made for the development of the production of synthetic isoprene rubber and the substitution of isoprene rubber for natural rubber in the manufacture of heavy duty truck tires. By using different polymerization processes it is possible to produce isoprene rubbers whose chain structures are very similar, but whose molecular weights, and therefore physical and technological properties, are very different. The cis structure of the 1,4 polyisoprene chains is the basic structural element of the new isoprene polymer. Therefore these synthetic isoprene rubbers (SKI) obtained through catalytic polymerization when vulcanized show a crystalline structure when x-rayed in the stretched state. The x-ray photographs also show that the geometric distribution of interference spots in SKI rubbers corresponds to the distribution of interference spots in natural rubber, but that the relative intensities of the crystalline, liquid, and amorphous scatterings in the two rubbers are different (Figure 1).

scholarly journals Assessing the Financial and Environmental Sustainability in Raw Rubber Processing; a Case Study with Ribbed Smoked Sheet Manufacture in Sri Lanka

2019 ◽  
Author(s):  
Pasan Dunuwila ◽  
V.H.L. Rodrigo ◽  
Naohiro Goto
Keyword(s):  
Sri Lanka ◽  
Natural Rubber ◽  
Environmental Sustainability ◽  
Material Flow ◽  
Flow Analysis ◽  
Ghg Emissions ◽  
Material Flow Analysis ◽  
Sufficient Information ◽  
Financial Loss ◽  
Cost Efficient

Sri Lanka has been renowned for its top quality natural rubber products. Among the locally manufactured raw rubber types, ribbed smoked sheets (RSS) hold a significant position as it entails ca. 50% of total natural rubber production in island. With no sufficient information on effectiveness in the use of materials and finance and then environmental impacts of RSS manufacture, this study aimed at assessing RSS manufacturing process adopting Material flow analysis, Material flow cost accounting and environmental Life cycle assessment in three factories in view of providing effective suggestions for making the system to be more cost efficient and environmentally friendly. Results indicated that manufacture cost, financial loss and GHG emissions generated by processing 1 MT of RSS were LKR 104,004 ± 6,336, LKR 1,007 ± 44 and 38.0 ± 2.1 kg CO2e, respectively (mean ± standard error). As an improvement option, installing single-day smoke dryers was proposed. This option could reduce firewood consumption per 1 MT of RSS by ca. 30% resulting in 0.1% and 14% of reductions in manufacture cost and GHG emissions, respectively. Implications of these findings are also discussed.

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