scholarly journals The Influence of Contaminants During the Firing of Inks

1983 ◽  
Vol 10 (4) ◽  
pp. 247-254 ◽  
Author(s):  
A. J. M. Van Gorp ◽  
J. H. C. Van Mourik
Keyword(s):  
Organic Compounds ◽  
Firing Temperature ◽  
Organic Materials ◽  
High Sensitivity ◽  
Inorganic Salts ◽  
Chlorinated Compounds ◽  
Very High ◽  
Gaseous Contaminants

During firing of resistor materials the resistance is influenced by gaseous contaminants and by compounds given off by other pastes. Nearly all inorganic salts which are slightly volatile at the firing temperature, and some rather stable organic materials influence the resistor properties. Halogenated materials are the most important and the higher ohmic series the most sensitive.For aluminium conductors a very high sensitivity to fluorinated and chlorinated compounds has been found but in this case organic compounds have no influence.

scholarly journals Effect of the presence of corrosion products on the corrosion rate of lead during the exposition with paper packaging materials

2018 ◽  
Vol 62 (3) ◽  
pp. 87-96 ◽  
Author(s):  
K. Ch. Strachotová ◽  
M. Kouřil
Keyword(s):  
Corrosion Rate ◽  
Organic Compounds ◽  
Material Properties ◽  
Organic Materials ◽  
High Sensitivity ◽  
Packaging Material ◽  
Corrosion Products ◽  
Packaging Materials ◽  
High Concentration ◽  
Complex Influence

Abstract High sensitivity of lead to organic compounds leads to degradation of historical lead objects stored in the depositories of museums or archives. High concentration of organic compounds in the atmosphere of depositories is caused by degradation of organic materials (wood, glue, leather, paper). Organic materials are stored together with lead objects or they are used as a packaging material. This study was aimed on the influence of packaging material properties to aggressiveness towards lead with different state of surface by the resistometric method. The results showed that aggressiveness of packaging material is determined by a complex influence of material properties. The presence of corrosion products on the lead surface significantly increases its sensitivity to organic compounds.

ANALYSIS FOR POTENCY AND PRODUCTION OF GRANULE ORGANIC FERTILIZER BASED ON MANURE

2018 ◽  
Vol 7 (2) ◽  
Author(s):  
Firman L. Sahwan
Keyword(s):  
Organic Material ◽  
Organic Materials ◽  
Raw Materials ◽  
Organic Fertilizer ◽  
Raw Material ◽  
Cow Manure ◽  
Production Potential ◽  
Natural Organic Material ◽  
Very High

Organic materials that are generally used as raw material for organic fertilizer granules (POG) is a natural organic material that has been degrade, smooth and dry. One of the main raw materials are always used with a very high percentage of usage, is manure. Manure potential in Indonesia is very high, amounting to 113.6 million tons per year, or 64.7 million tons per year to the island of Java. From this amount, it will be generated numbers POG production potential of 17.5 million tons per year (total Indonesia) or 9.9 million tons per year for the island of Java. While the realistic POG production predictions figures made from raw manure is 2.5 million tons annually, a figure that has been unable to meet the number requirement of POG greater than 4 million tons per year. Therefore, in producing POG, it should be to maximize the using of the potential of other organic materials so that the use of manure can be saved. With the use of a small amount of manure (maximum 30% for cow manure), it would be useful also to avoid the production of POG with high Fe content.keywods: organic material, manure, granule organic fertilizer

scholarly journals Halogenated Volatile Organic Compounds in Water Samples and Inorganic Elements Levels in Ores for Characterizing a High Anthropogenic Polluted Area in the Northern Latium Region (Italy)

2021 ◽  
Vol 18 (4) ◽  
pp. 1628
Author(s):  
Mario Vincenzo Russo ◽  
Ivan Notardonato ◽  
Alberto Rosada ◽  
Giuseppe Ianiri ◽  
Pasquale Avino
Keyword(s):  
Organic Compounds ◽  
Mean Value ◽  
Greenhouse Crops ◽  
River Waters ◽  
Liquid Liquid Extraction ◽  
Volatile Organic ◽  
High Concentrations ◽  
Very High ◽  
Inorganic Fraction

This paper shows a characterization of the organic and inorganic fraction of river waters (Tiber and Marta) and ores/soil samples collected in the Northern Latium region of Italy for evaluating the anthropogenic/natural source contribution to the environmental pollution of this area. For organic compounds, organochloride volatile compounds in Tiber and Marta rivers were analyzed by two different clean-up methods (i.e., liquid–liquid extraction and static headspace) followed by gas chromatography–electron capture detector (GC-ECD) analysis. The results show very high concentrations of bromoform (up to 1.82 and 3.2 µg L−1 in Tiber and Marta rivers, respectively), due to the presence of greenhouse crops, and of chloroform and tetrachloroethene, due to the presence of handicrafts installations. For the qualitative and quantitative assessment of the inorganic fraction, it is highlighted the use of a nuclear analytical method, instrumental neutron activation analysis, which allows having more information as possible from the sample without performing any chemical-physical pretreatment. The results have evidenced high levels of mercury (mean value 88.6 µg g−1), antimony (77.7 µg g−1), strontium (12,039 µg g−1) and zinc (103 µg g−1), whereas rare earth elements show levels similar to the literature data. Particular consideration is drawn for arsenic (414 µg g−1): the levels found in this paper (ranging between 1 and 5100 µg g−1) explain the high content of such element (as arsenates) in the aquifer, a big issue in this area.

Very high sensitivity optical modulators based on band filling effect in GaInAs quantum wells

1990 ◽  
Author(s):  
T.Y. Chang ◽  
J.E. Zucker ◽  
K.L. Jones ◽  
N.J. Sauer ◽  
B. Tell ◽  
...  
Keyword(s):  
Quantum Wells ◽  
High Sensitivity ◽  
Optical Modulators ◽  
Band Filling ◽  
Very High

scholarly journals Vulnerability analysis of capture fisheries to climate change based on the Province Scale (exposure and sensitivity analysis)

2021 ◽  
Vol 869 (1) ◽  
pp. 012016
Author(s):  
V Mandhalika ◽  
A B Sambah ◽  
D O Sutjipto ◽  
F Iranawati ◽  
M A Z Fuad ◽  
...  
Keyword(s):  
Climate Change ◽  
High Sensitivity ◽  
Final Analysis ◽  
Vulnerability Analysis ◽  
Exposure Analysis ◽  
Sst Variability ◽  
Vulnerability To Climate Change ◽  
Important Input ◽  
Recorded Data ◽  
Very High

Abstract Fisheries has a major contribution for the Indonesian economy both on a local and national scale. However, the phenomenon of climate change can threaten the sustainability of this sector. Therefore, a scientific approach is needed to determine the level of risk and adaptation strategies for fisheries, one of which is through vulnerability analysis. Vulnerability is the final analysis resulted from the analysis of sensitivity and exposure. Both of these analyses are important to determine the parameters that will affect the value of the fishery vulnerability to climate change. This research is focused on sensitivity and exposure analysis with the coverage limit is the province area to determine the sensitivity and exposure index that exists in the study area. The result will be important input in further research for the vulnerability of capture fisheries to climate change. Three provinces in Indonesia were selected through purposive sampling method. The source of data for indices variables were using recorded data in 2009-2020 from relevant sources. Result described that SST variability in the three provinces has the same pattern. In the exposure analysis, the SST is linked to the catch resulting in different exposure statuses in each province. It also illustrated those areas with a very high number of fishermen and catches will have very high sensitivity. The research will support in the sustainable management of capture fish at the province scale.

The enhanced photoelectric properties of ZnO-doped WSe2 thin film

2021 ◽  
pp. 2150082
Author(s):  
Jingyi Zhu ◽  
Xin Ding ◽  
Xiaoyu Zhang ◽  
Xiying Ma
Keyword(s):  
Thin Films ◽  
Light Absorption ◽  
High Sensitivity ◽  
Nucleation Density ◽  
Light Power ◽  
Thermal Evaporation Method ◽  
Si Substrates ◽  
Photoelectric Properties ◽  
Very High ◽  
Photoluminescence Efficiency

The photoelectric properties of ZnO-doped WSe2 thin films created on Si substrates by a thermal evaporation method were investigated. The effects of ZnO on the surface morphology, structure, photoluminescence, light absorption characteristics and electrical properties of WSe2 thin films were analyzed. It is found that the nucleation density and the crystallinity of the ZnO-doped WSe2 nanowires are higher than without doping, and the electron mobility of the doped sample is about 1.4 times that of the undoped sample. Also, doping improved the light absorption and photoluminescence efficiency. Additionally, the [Formula: see text]–[Formula: see text] curve of the ZnO-doped WSe2/Si heterojunction gradually changes from a rectification characteristic to a linear dependence, and the photocurrent increases by about four times when the light power increases from 0 to 25 mW/cm2. Moreover, the heterojunction has a very high sensitivity to operating temperature; the current significantly increases as the temperature increases to 300[Formula: see text]. With high absorptivity and photoluminescence efficiency, and sensitivity to light and temperature, ZnO-doped WSe2 film is promising for use in optoelectronic devices.

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