• Korean Journal of Fisheries and Aquatic Sciences
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• v.26 no.2
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• pp.111-119
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• 1993

The nitrogenous compounds and minerals in the raw and cooked meat of cockle shell were analyzed, and compared with those of cooked meat extracts. In abundant free amino acids, the content of glutamic acid was $129mg\%$ in raw meet, $105mg\%$ in cooked meat, $28mg\%$ in cooked meet extracts, aspartic acid, glycine, arginine, lysine, leucine, and alanine in order. The major components were lysine, arginine and leucine, and the minor components of essential amino acids were proline, tyrosine, serine and cystine. Some of ATP, ADP, AMP, inosine and hypoxanthine were identified in raw and cooked meat, but IMP and inosine were not detected in cooked meat extracts. A slight drop in content of ATP was showed in cooked meat and those had a higher content in inosine and hypoxanthine compared with raw meat. TMA, TMAO and betaine were also checked in all meat products and TMA slightly increased during cooking. Minerals in cooked cockle shell products were phosphorous, potassium, calcium and zinc. The content of phosphorous showed the highest value($16mg\%$ in raw, $185mg\%$ in cooked meat, and $25mg\%$ in extracts).

• Journal of the Korean institute of surface engineering
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• v.25 no.3
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• pp.107-116
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• 1992

The optimum thickness of Pd-Ni plated layers used as an electrical contact film was investigated by evaluating mechanical, thermal and environmental characteristics. The variations of morphologies and chemical compositions were studied by using SEM, EDS and ESCA. As a result of wear test, the wear resistance behavior of the gold plated layers was not changed with the sliding velocity changes. The palladium-nickel plated layer showed better wear resistance than the gold plated layer at low sliding velocity, but it showed poor wear resistance at high sliding velocity. Under the thermal condition of $400^{\circ}C$ in air, the gold thickness of $2\mu\textrm{m}$ without underplate on phosphorous bronze formed copper oxide on the surface layer by rapid diffusion of copper whereas the gold thickness of $0.8\mu\textrm{m}$ deposited on nickel and palladium-nickel underplate was stable at $400^{\circ}C$. Under the sulfur dioxide environments, the gold thickness of $0.3\mu\textrm{m}$ deposited on the nickel thickness of$ 3\mu\textrm{m}$ and the palladium-nickel thickness of $2\mu\textrm{m}$ underplate was more corrosion-resistant than the gold thickness of $2\mu\textrm{m}$ without underplate on phosphorous bronze. Under the nitric acid vapor environment, corrosion resistance of the gold film was superior to an equivalent thickness of the palladium-nickel film.

• Textile Coloration and Finishing
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• v.33 no.4
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• pp.238-249
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• 2021

In this study, the effect on flame retardancy and various physical properties when TiO₂ was added with a citric acid/phosphate complex acid catalyst together with Pyrovatex CP new (N-methylol dimethylphosphonopropionamide), a phosphorus-based flame retardant, was studied on cotton fibers. SEM-EDS analysis was performed to confirm the surface characteristics and surface element analysis of the flame-retardant treated cotton fibers, and a vertical carbonization test was performed to confirm the char formation capability and flame retardancy according to the phosphoric acid ratio. By comparing the LOI index before and after washing 10 times, the washing durability of the flame retardant solution containing the phosphoric acid catalyst and TiO₂ was tested by LOI index after ten washing cycles. In addition, the influence of the flame-retardant processing on the physical properties were compared including thermogravimetric analysis (TGA), tear strength and whiteness.

• Journal of the Korean Society of Food Science and Nutrition
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• v.20 no.3
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• pp.220-224
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• 1991

Six reagents (water, citric acid, phosphoric acid, oxalic acid, acetic anhydride and maleic anhydride) were evaluated for their effectiveness is degumming rice bran oil. All chemical reagents tested were found to be significantly more effective than water in removing phosphatides from crude rice bran oil. Especially acetic anhydride and phosphoric acid were effective in reducing phosphorous levels (92.5% and 93.3% removeal, respectively). Nonhydratable phospholipids, lysophosphatidyl choline, were removed more effectively by the chemical reagents than by the water degumming. The major phospholipid(PL) components were phophatidyl choline. Oleic, linolieic and palmitic acids were the major fatty acids of PL in rice bran acetone insolubles(AI). The AI recovered by acetic anhydride degumming produced the most stable emulsions. However, the AI obtained from phophoric acid or oxalic acid treatments had very poor emulsifying properties.

• Environmental Engineering Research
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• v.22 no.2
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• pp.224-229
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• 2017

Zinc oxide nanoparticles (ZnO NPs) have been used as additives in a variety of consumer products. While these particles may enter the environment, only a limited number of studies have investigated the effects of ZnO NPs on soil exoenzymes. Here, we investigate the long-term effects of ZnO NPs at concentrations of 50 and 500 mg/kg on the activities of six soil exoenzymes in planted soils: Dehydrogenase, fluorescein diacetate (FDA) hydrolase, urease, acid phosphatase, arylsulfatase, and ${\beta}-glucosidase$. Significant effects were observed at one or more time points for all enzymes except for FDA hydrolase. These effects included both decreases and increases in enzyme activity. Our results suggest that ZnO NP treatments of 50 and 500 mg/kg can adversely affect soil enzymes, particularly acid phosphatase and urease, and thus, these data may have implications for phosphorous and nitrogen cycles in the soil.

• YAKHAK HOEJI
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• v.31 no.4
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• pp.224-229
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• 1987

The earthworm(Annelid) is a herbicine which has traditionally been used in the treatment of infectious fever, jaundice, infection of middle ear, laryngitis, pharyngitis, nephritis, headache, toothache and certain urinary tract infections from the olden times. Before the isolation and purification of biologically active components we analyzed the basic constituents(proteins, amino acids, mineral, etc.) with lyophilized powder of Lamnodrilus gotai Hatai. The results were as follows: Minerals detected and quantitatively analyzed were $Ca^#$, $Mg^#$, Fe, Zn, Mn, Cu, Co, Cr, Ni, Ge and Se. Amino acids detected were alanine, phenylalanine, leucine, glutamic acid, tyrosine, threonine, arginine, aspartic acid, methionine, lysine, serine, histidine, isoleucine, glycine, proline and etc. The constituents of proteins, fat, fiber, ash and phosphorous were measured. These constituents were compared and discussed with those of other investigations.

• Journal of the Korean institute of surface engineering
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• v.48 no.3
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• pp.100-104
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• 2015

The nickel alloys gets a great deal of attention due to their good mechanical, chemical and magnetic properties. Especially Ni-P alloy systems are very attractive due to their good corrosion resistance and the wear resistance in important technological applications. In this study, the effects of phosphorus acid concentration in plating solution on composition of Ni-P alloy coatings were studied. The Ni-P electrodeposits of the various P contents were investigated in order to understand effect of the composition on mechanical properties of Ni-P electrodeposits. The mechanical properties of electrodeposits increased as the P content in electrodeposits increase. The results of mechanical properties were explained by grain size and P solid solution effect. The effects of heat treatment on mechanical properties of Ni-P alloy coatings were also studied.

• Proceedings of the Korean Society of Fisheries Technology Conference
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• 2001.05a
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• pp.220-221
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• 2001

Phytic acid (myo-inositol 1,2,3,4,5,6-hexakisdihydrogen phosphate) is one of the major storage form of phosphorous in the seeds of plants, which are the principal components of feed stuffs. Monogastric animals like Pigs and poultry as well as fish lack phytase activities in their digestive system and most undigested phytic acid was excreted in their manure. (omitted)

• Journal of the Korean Society of Food Culture
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• v.28 no.5
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• pp.502-511
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• 2013

This study evaluated the composition two popular species of edible bamboo shoots in Korea (Phyllostachyspubescens and Sinoarundinarianigra) and the effect of their abundant dietary fiber on intestinal microorganisms in healthy young women. The ranges of total moisture, crude protein, crude lipid, crude ash, and dietary fiber content were 87.190.8, 2.943.5, 0.150.39, 0.411.05, and 4.206.15% (wet weight basis), respectively. Moisture and crude ash content increased after heat treatment; however, crude protein, crude lipid, and dietary fiber content were reduced after heating. The major minerals found in bamboo shoots were potassium, phosphorous, sulfur, magnesium, and calcium. In addition, glucose and fructose were abundant free sugars, while asparagine and tyrosine were the most abundant free amino acids. Approximately 70% of the total free fatty acids found in bamboo shoots were linoleic acid and linolenic acid. The ascorbic acid content was 6.60~17.56 mg/100 g (wet weight basis), and one phenolic compound, p-hydroxy benzoic acid, was 0.10.2% (wet weight basis) and detected by HPLC analysis. The intake of bamboo shoots for seven days significantly increased viable cell counts of Lactobacillus spp. and reduced viable cell counts of Bacteriodes spp. in feces (p<0.05). In our data, bamboo shoots may be useful in the food industry as high dietary fiber ingredients.

• Applied Chemistry for Engineering
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• v.23 no.6
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• pp.583-587
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• 2012

Six kinds of new aminoalkyl phosphonic acid or aminoalkyl phosphinic acid derivatives with mono-dialkylamino, or di-dialkylamino functional groups in the molecule were synthesized and their smoke densities were tested. The aminoalkyl phposphonic acid or aminoalkyl phosphinic acid derivatives were synthesized with quantitative yields of 90~98.6% by one step reaction of the phosphorus acid or hypo phosphorous acid with amine and aldehyde. The smoke density was measured by the ASTM E 662 method. Values of the smoke density were obtained from 224.5 to 256.6. The smoke density of the compounds with two aminoalkyl structures decreased more than that of compounds with one aminoalkyl structure. In addition, there was no correlation between the smoke density and the number of carbon atoms in the alkyl group attached to the amino group.