• Title, Summary, Keyword: alkaline processing

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Effect of Sarcoplasmic Protein and NaCl on Heating Gel from Fish Muscle Surimi Prepared by Acid and Alkaline Processing (산과 알칼리 공정으로 제조한 어육 수리미의 가열 겔에 미치는 근형질단백질과 NaCl의 영향)

  • 박주동;윤수성;정춘희;조민성;최영준
    • Journal of the Korean Society of Food Science and Nutrition
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    • v.32 no.4
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    • pp.567-573
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    • 2003
  • Surimi yields from acid and alkaline processing of 5 fishes were compared to those from conventional processing Effect of sarcoplasmic protein and NaCl on heating gel from acid and alkaline surimi were also investigated by punch test and color. Yield of alkaline surimi was higher than that of conventional surimi. However, the breaking force, deformation and whiteness of heating gel from alkaline surimi were lower than those of heating gel from conventional surimi. The sarcoplasmic protein increased a breaking force and a deformation of gel. A breaking force was decreased, but deformation not significantly with NaCl concentration. Myosin heavy chain (MHC) and actin were greatly degraded in acid processing. Alkaline process for surimi is a valuable way of increasing the utilization of frozen and pelagic fishes, and making kamaboko-type products.

Surimi Processing Using Acid and Alkali Solubilization of Fish Muscle Protein (산과 알칼리 pH에서 어육 단백질의 용해를 이용한 수리미 제조)

  • 박주동;정춘희;김진수;조득문;조민성;최영준
    • Journal of the Korean Society of Food Science and Nutrition
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    • v.32 no.3
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    • pp.400-405
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    • 2003
  • The surimi processing from jack mackerel and white croaker muscle using acidic and alkaline solubilization was evaluated. The optimum pH for solubilizing protein in acidic and alkaline range was around 2.5 and 10.5, respectively. The optimum pH value for recovery of protein was around 5. The protein solubility was decreased with increase of salt. The homogenized speed and time for maximum solubility were below 9,500 rpm and 30s, respectively The optimum ratio of water to minced muscle was 6 by evaluating breaking force, deformation and whiteness of cooked gel. The protein yield of alkaline processing is higher than that of conventional processing. In addition, the waste water of conventional processing had high solid, nitrogen content and chemical oxygen demand compare to those of acidic and alkaline processing.

Scanning Tunneling Microscopy (STM)/Atomic Force Microscopy(AFM) Studies of Silicon Surfaces Treated in Alkaline Solutions of Interest to Semiconductor Processing

  • Park, Jin-Goo
    • Journal of the Korean institute of surface engineering
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    • v.28 no.1
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    • pp.55-63
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    • 1995
  • Alkaline solutions such as $NH_4$OH, choline and TMAH (($CH_3$)$_4$NOH) have been introduced in semiconductor wet processing of silicon wafers to control ionic and particulate impurities following etching in acidic solutions. These chemicals usually mixed with hydrogen peroxide and/or surfactants to control the etch rate of silicon. The highest etch rate was observed in $NH_4$OH solutions at a pH in alkaline solutions. It indicates that the etch rate depends on the content of $OH^{-}$ as well as cations of alkaline solutions. STM/AFM techniques were used to characterize the effect of alkaline solutions on silicon surface roughness. In SC1 (mixture of $NH_4$OH : $H_2$$O_2$ : $H_2$O) solutions, the reduction of the ammonium hydroxide proportion from 1 to 0.1 decreased the surface roughness ($R_{rms}$) from 6.4 to $0.8\AA$. The addition of $H_2$$O_2$ and surfactants to choline and TMAH reduced the values of $R_{p-v}$ and $R_{rms}$ significantly. $H_2$$_O2$ and surfactants added in alkaline solutions passivate bare silicon surfaces by the oxidation and adsorption, respectively. The passivation of surfaces in alkaline solutions resulted in lower etch rate of silicon thereby provided smoother surfaces.s.ces.s.

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Availability of Alkaline ionic Water as a Cooking Water (알칼리성 이온수의 조리용수로서의 이용)

  • O, Seung-Hui;Ha, Tae-Ik;Jang, Myeong-Ho
    • The Korean Journal of Food And Nutrition
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    • v.6 no.1
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    • pp.8-15
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    • 1993
  • We have examined the utility of alkaline ionic water for processing water In order to compare with piped tap water in cooking rice, making kimchi, making bean curd, raising bean sprouts and parboiling spinach. And we have estimated the quality of them. The result of the examination was as follow. A rice cooked with alkaline ionic water had pale yellow color, and had good quality in polish, viscocity, taste, odour and retrogradation as compared with a rice cooked of piped tap water. In the case of a water kimchi, refreshing taste and other kinds of taste were good. Unpleasant taste and smell have decreased. Fresh colour of a Chinese cabbage were maintained long because of the prevention of destruction of chlorophyll. In the case of bean sprouts, sprouting rate was promoted up to 2∼3% during the period of 2∼3 days as compared with that treated with piped tap water And the growth state was good and the contents of vitamin C were high as compared with those with piped tap water. In the case of parboiling of green spinach, the alkaline ionic water helped keeping the chlorophyll of spinach. In the case of bean curd, soft taste, polish, smell and total taste were good. The Utility value of alkaline ionic water for the processing of soft bean curd was recognized by making it soften.

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Mass Spectrometry in the Determination of Glycosylation Site and N-Glycan Structures of Human Placental Alkaline Phosphatase

  • Solakyildirim, Kemal;Li, Lingyun;Linhardt, Robert J.
    • Mass Spectrometry Letters
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    • v.9 no.3
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    • pp.67-72
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    • 2018
  • Alkaline phosphatase (AP) is a membrane-bound glycoprotein that is widely distributed in the plasma membrane of cells of various organs and also found in many organisms from bacteria to humans. The complete amino acid sequence and three-dimensional structure of human placental alkaline phosphatase have been reported. Based on the literature data, AP consists of two presumptive glycosylation sites, at Asn-144 and Asn-271. However, it only contains a single occupied N-linked glycosylation site and no occupied O-linked glycosylation sites. Hydrophilic interaction chromatography (HILIC) has been primarily employed for the characterization of the glycan structures derived from glycoproteins. N-glycan structures from human placental alkaline phosphatase (PLAP) were investigated using HILIC-Orbitrap MS, and subsequent data processing and glycan assignment software. 16 structures including 10 sialylated N-glycans were identified from PLAP.

Alkaline Pilot Processing for Recovery of Fish Muscle Protein and Properties of Recovered Protein (어육 단백질 회수를 위한 알칼리 Pilot 공정과 회수 단백질의 특성)

  • Jang, Young-Boo;Kim, Gun-Bae;Lee, Keun-Woo;Choi, Yeung-Joon
    • Journal of the Korean Society of Food Science and Nutrition
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    • v.35 no.8
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    • pp.1045-1050
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    • 2006
  • Optimum operation condition for pilot scale of alkaline processing for fish muscle was investigated by measuring protein solubility, yield, texture, and water-holding capacity. Recovered protein yield was 33.2% for whole fish and 61.8% for minced muscle. Optimum homogenized speed and time, using industrial scale homogenizer, were 3,000 rpm and 5 min, respectively. Limited centrifugal force of continuous cylinder type was 4,000 rpm for recovering soluble protein, and 2,000 rpm for recovering precipitated proteins. The pH control agents such as citric acid, sodium phosphate and calcium oxide decreased the breaking force and deformation of recovered protein gel. The breaking force and deformation of the recovered proteins were high compared to conventional surimi. The breaking force and deformation were decreased by addition of salt, starch and bovine plasma proteins. Whiteness of recovered protein gel was lower than that of conventional surimi. Alkaline processing greatly decreased nitrogen content and chemical oxygen demand in waste water. The results suggest that alkaline processing has a potential as industrial production for recovering the proteins from fish muscle.

Lysinoalanine in Protein Recovered from Frozen Belanger's Croaker, Johnius grypotus, Using Alkaline Processing (알칼리 처리하여 회수한 냉동깡치 어육 단백질의 Lysinoalanine 함량)

  • Kim, Gun-Bae;Lee, Keun-Woo;Hur, Sung-Ik;Choi, Yeung-Joon
    • Korean Journal of Fisheries and Aquatic Sciences
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    • v.40 no.6
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    • pp.337-342
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    • 2007
  • The formation of lysinoalanine (LAL) in protein recovered from the belanger's croaker, Johnius grypotus, using a pH shifting process was measured by amino acid analysis. The LAL peak was detected at 49.24 min, between phenylalanine and histidine peaks in the amino acid analyzer. LAL was not detected in the fish muscle or in protein recovered using the alkaline pH shifting process. LAL was not formed in protein recovered after storage for up to 9 hrs at pH 11, but was detected in the soluble protein fraction at pH 11, followed heating at $90\;^{\circ}C$. The myosin heavy chain decreased with storage time at pH 11. The results suggest that the alkaline shifting process for recovering fish muscle protein is safe, and that no LAL forms.

Compatibility of the Recycled Linerboard Made in Acid Sizing System under Neutral or Alkaline Papermaking Conditions (산성 사이징된 재활용 섬유와 중성 사이징의 상용성)

  • Seo, Man Seok;Lee, Kyong Ho;Lee, Hak Lae
    • Journal of Korea Technical Association of The Pulp and Paper Industry
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    • v.48 no.2
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    • pp.56-60
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    • 2016
  • Neutral or alkaline papermaking provides many advantages in paper strength and processing conditions. It also provides the opportunity of using calcium carbonate fillers in papermaking. These diverse advantages have made almost all paper machines of printing and writing papers run under neutral and alkaline conditions. On the other hand, linerboard machines, which use recycled papers as a raw material, are running under acid conditions using a rosin sizing system. Because the recycled raw materials used by the linerboard industry contain significant amounts of alkaline papers, the linerboard industry has an interest in the possibility of using the neutral or alkaline papermaking opportunity. In this study, the compatibility of the recycled linerboards under neutral or alkaline papermaking conditions was examined by recycling them under various pH conditions. The sizing degree of the papers recycled under neutral or alkaline was significantly lower than that of acid formed papers indicating that during the neutral or alkaline recycling process the rosin sized papers lost their sizing efficiency. Recycling of acid formed linerboards under neutral or alkaline conditions increased the amount of foam, and the foam contained substantial amount of solid materials derived from the acid sizing systems. Use of cationic polyelectrolytes including PEI and poly-DADMAC improved the sizing degree of the recycled papers under neutral and alkaline conditions. PEI decreased the foam generation as well while poly-DADMAC did not show any reducing effect of the foam. These results suggest that PEI forms coordinate bonds with rosin acid and precipitate them onto the surface of recycled fibers, while the reaction products between poly-DADMAC and rosin acid ions still remain water soluble under neutral or alkaline conditions.

Influence of Extrusion on the Solubility of Defatted Soybean Flour in Enzymatic Hydrolysis

  • Cha, Jea-Yoon;Shin, Han-Seung;Cho, Yong-Jin;Kim, Chong-Tai;Kim, Chul-Jin
    • Food Science and Biotechnology
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    • v.16 no.4
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    • pp.543-548
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    • 2007
  • Low-energy processing technology, which enhances the utility of defatted soybean flour (DSF), was developed using extrusion processing. DSF was extruded at different conditions using a twin screw extruder and then, dried at $40^{\circ}C$ for 20 hr. The nitrogen solubility index (NSI), viscosity, water solubility index (WSI), and water absorption index (WAI) of DSF increased after extrusion processing. The density of DSF extrudates decreased with the decrease in water content from 53 to 33% and the increase in extrusion temperature from 110 to $160^{\circ}C$. The addition of NaOH from 1.2 to 1.8% and citric acid from 1 to 5% increased the total solubility (TS) of DSF due to the decrease of protein coiling and hydrophobic bonds formation during extrusion processing. When viscozyme was reacted first, TS, NSI, and soluble carbohydrate content of DSF hydrolysates increased about 12, 6, and 7%, respectively, compared to them reacted with protease first. The TS and NSI of DSF hydrolysates were increased about 15 and 10%, respectively, by extrusion processing at alkaline and acidic pH. Extrusion processing at alkaline and acidic pH contributed the increase of efficiency to hydrolyze DSF samples using enzyme.

Utilization of Korean Maizes in Prodction of Alkaline Processed Snack Foods

  • Lee, Jae-Kwon
    • Preventive Nutrition and Food Science
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    • v.2 no.1
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    • pp.11-16
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    • 1997
  • Alkaline cooking and processing properties of domestic maize were evaluated by comparing to those of imported control maize(Asgrow 404). Domestric maize varieties were hydrated more rapidly and had lower dry matter losses during alkaline cooking than control maize due to softer endosperm texture and incomplete removal of pericarps. Domestic maize varieties produced masas with proper handling properties when nixtamals had 50~52% moisture. However, masas produced from domestic maizes were puffed dur-ing baking and frying process due to the release of more free starch granules in the masa than control masa. Tortilla chips prepared from domestic maizes absorbed more oil during frying and had slightly higher water content with darker color than tortilla chips prepared from control maize. Among the domestic maize hybrids, KS42/Fla2BT113 had more acceptable kernel characteristics of tortilla chips than other varieties.

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