• Korean Journal of Food Science and Technology
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• v.41 no.1
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• pp.1-6
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• 2009

This study investigated arsenic speciation and risk assesment in 30 samples of hijiki purchased from local market in 10 Korean cities. The mean arsenic concentration of the hijiki samples was 45.65 mg/kg (dryness; moisture content of 91.1${\pm}$1.6%), and the major arsenic compound was arsenate [As(V)]. The concentrations of As(V) and As(III), as inorganic arsenic compounds, were detected to be 40.36 mg/kg and 0.37 mg/kg, respectively, and made up 88.6% (40.46 mg/kg) of the arsenic in the hijiki. Among the samples, the highest inorganic arsenic concentration was identified at 9.19 mg/kg (wet), and for an adult with a body weight of 60 kg was within an acceptable level as 0.7% (6.43 mg/60 kg/week) when compared with the provisional tolerable weekly intake (PTWI) (900 mg/60 kg/week), and would be considered safe with respect to health-hazardous effects.

• The Korean Journal of Nuclear Medicine Technology
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• v.13 no.3
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• pp.171-174
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• 2009

Purpose: Cancerous death rate 1 place from 2008 year domestic is the lung cancer. The body count which is caused by in the lung cancer every year is increasing. At this lung cancer is the most non small cell lung cancer. $Monototal^{TM}$ test is short reaction time. it is known as the experiment where the example standard of living is high about non small cell lung cancer. This is the study evaluate usefulness of $Monototal^{TM}$ kit. Materials and Methods: $Monototal^{TM}$ were measured using IRMA kit, using 40 CEA positive patients sample which are diagnosed NSCLC, 15 SCC positive patients sample which are diagnosed NSCLC, 40 Cyfra 21-1 positive sample, 20 negative sample in Seoul national university from March to April, 2009. Results: According to result of the $Monototal^{TM}$ test, which is benignancy rate 87.5% in CEA positive patients sample, 93.3% SCC positive patients sample and 100% Cyfra 21-1 positive sample Conclusions: We recommend that using of $Monototal^{TM}$ parallel with different tumor markers. It was useful that diagnosis and convalescence presumption of Non small cell lung cancer.

• Korean Journal of Environmental Agriculture
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• v.6 no.2
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• pp.39-45
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• 1987

A water culture experiment was conducted to investigate the effect of As content in a culture solution on the water status and growth of rice plants. Rice (Oryza sativa L. Line. Iri 316) seeds were germinated in bentonite and cultivated there for 30 days. Rice seedlings were transplanted into 3.5l pots containing the culture solution on May 1, 1985 and allowed to grow without As treatment for one month. Afterwards, they were grown in a culture solution maintaining the final concentration of As, 0, 1, 5, 10 and 15mg/1 renewing in the solution dissolved sodium arsenate at intervals of 3 to 7 days. Plants were cultivated in the green house during the growing period and harvested 60 days after As treatment. The results obtained were as follows: Transpiration of rice plants was decreased with the increase of the As level in the culture solution. Stomatal diffusive resistance and leaf temperature increased with increase of As levels though the humidity and the air flow rate in leaf decreased. Air flow rate, transpiration and stomatal diffusive resistance showed a highly significant correlation with As contents in shoots and roots of rice plants: Espally The air flow rate and transpiration revealed a significantly higher correlation with As contents in the root than that in the shoot, but diffusive resistance showed adverse tendency. High levels of As in the culture solution depressed plant height, no. of tillers, leaf width and dry weight of plant remarkably. Typical symptoms of As toxicity were root discoloration, and necrosis of leaf tips and margins, and leaf rolling during the sunny daytime were also another symptoms.

• Tuberculosis and Respiratory Diseases
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• v.47 no.3
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• pp.331-338
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• 1999

Background: Nearly 10% of cancer patients will develop a second primary cancer within ten years after surgical removal of the primary tumor. The detection of risk factors for developing multiple primary tumors would be important This study was conducted to evaluate the clinical characteristics and abnormal p53 expression of lung cancer associated with multiple primary cancer(MPC). Method: Clinical characteristics and abnormal p53 expression were compared between 20 cases of lung cancer(NSCLC ; 16 cases, SCLC ; 4 cases) associated with MPC and 26 cases of primary non-small cell lung cancer. Result: MPC associated with lung cancer was gastric cancer(8), lung cancer(2), esophageal cancer(2), colon cancer(2), laryngeal cancer(1), bladder cancer(1), small bowel cancer(l), adrenal cancer(1), hepatocellular carcinoma(1), and breast cancer (1) in order. The clinical stage of primary NSCLC was relatively advanced, but NSCLC associated with MPC was even distribution at each stage. The detected incidences of abnormal p53 expressions were 62.5% in NSCLC associated with MPC and 76.9% in primary NSCLC(p>0.05). Conclusion: There was no difference in abnormal p53 expression between non-small cell carcinoma associated with multiple primary cancer and primary non-small cell carcinoma.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2017.11a
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• pp.225-226
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• 2017

Recently, there has been a growing interest in the development of non-sintered binder to reduce CO2 emissions from the cement clinker manufacturing process and a number of studies have been conducted on fly ashes as an industrial by-product. However, in order to utilize fly ashes as a non-sintered binder, it is necessary to solve problems such as safety issues and economical efficiency due to use of an alkali activator. This study evaluates the material properties and compressive strength characteristics of three types of circulating fluidized bed boiler ashes. As a result, it was confirmed that the characteristics of each binder vary depending on the location of the power plant and the types of raw materials. In addition, it has been confirmed that the fluidized bed boiler ash shows a high compressive strength and can be used sufficiently as an non-sintered binder.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2022.04a
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• pp.45-46
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• 2022

In this study, ultrasonic pulse velocity is compared on non-sintered hwangto concrete(NHTC) and normal concrete(NC) at ages. Strength of specimens set up 30MPa. Cement is replaced with 15 and 30% non-sintered hwangto. UPV is tested at 1, 3, 7, 28, 56, 91 days. As a result, UPV increases as the age and strength increase, but decreases as the non-sintered hwangto replacement increases. Although ultrasonic pulse velocity of NHTC was 72% lower than NC, after that, difference tends to decrease

• Proceedings of the Korean Institute of Building Construction Conference
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• 2022.04a
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• pp.186-187
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• 2022

The purpose of this study was to give fluidizing properties to non-sirtered cement made using by-products that can replace Portland cement by using a fluidizing agent. Blast furnace slag, C-type fly ash, and F-type fly ash were used for non-sirtered cement, and sand was used for aggregate. The amount of fluidizing agent used was fixed at 1%, and the water-cement ratio (W/C) was different by setting the binder blending ratio of the non-sintered cement differently, and the fluidity test and flow were compared. As a result of the experiment, when the flow standard was 170mm when the fluidizing agent was used, the fluidizing properties were shown at an average water-cement ratio (W/C) of 36%. Through this study, it was confirmed that the fluidizing properties appeared when the fluidizing agent was used in non-sintered cement.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2021.11a
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• pp.34-35
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• 2021

In this study, we compared and analyzed hydration heat of the Concrete(NC) and non-fired Hwangto Concrete(HT). The Concrete(NC) was based on the mix that showed 30, 45 MPa on compressive strength on 28th and Only cement was used to make it. and We substituted 30% of weight of unit cement to non-fired Hwangto to create non-fired Hwangto Concrete(HT).

• Proceedings of the Korean Institute of Building Construction Conference
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• 2023.05a
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• pp.39-40
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• 2023

In this study, the compressive strength development was analyzed at early ages of concrete specimens admixed with non-sintered hwangto to reduce the CO₂ emissions generated during cement production. The W/B of the specimens was set at 0.41, the percentage of non-sintered hwangto admixture was set at three levels of 15, 30, and 45%, and the compressive strength were measured at 1, 3, 7, and 28 days. The results showed that the compressive strength decreases as the percentage of non-sintered hwangto increases, but the strength development rate increases, and the NHTC41-15 test specimen developed a compressive strength close to NC41 at 28 days.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2023.11a
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• pp.273-274
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• 2023

In this study, ultrasonic pulse velocity was analyzed to evaluate the high-temperature mechanical properties of concrete mixed with non-sintered hwangto. The W/B of the specimens was set at 0.41, the percentage of non-sintered hwangto admixture was set at two levels of 15,30%. The target temperature of the specimen is set to 6 levels of 20, 100, 200, 300, 500, 700 ℃, and the heating rate is set to 1℃/min. The result showed that the amount of non-sintered hwangto incorporated into the concrete tends to results in lower compressive strength. Ultrasonic pulse velocity showed similar trends, but differed in some areas.