탈염과정 중 온도 및 염화칼슘이 단무지 품질에 미치는 영향

심정석,최원석 한국산업식품공학회 2012 산업 식품공학 Vol.16 No.4

본 연구에서는 단무지 가공초기인 탈염과정에서 온도변화(5oC, 25oC) 및 CaCl2 첨가(0.6%, w/w) 유무가 탈염 단무지의 품질에 미치는 영향을 조사함으로서, 단무지 품질 변화를 최소화 할 수 있는 기초자료를 제공하고자 하였다. 5oC에서 탈염한 경우 25oC 탈염과 비교하여 탈염기간이 증가하였으며, 특히 탈염기간 후반부에 상대적으로 탈염속도가 늦어지는 것으로 나타났다. 미생물(위생)적 측면에서 5oC 탈염이 바람직하였으며, 탈염시 CaCl2 첨가가 단무지의 총균수를 감소시키지는 않았다. pH 변화의 경우 5oC 탈염에서 감소폭이 적었고, 색깔의 경우 탈염기간동안 전반적으로 큰 변화는 나타나지 않았다. 조직감(굳기)은 5oC에서 CaCl2 처리하지 않고 탈염한 단무지에서 변화(감소)가 가장 적었으며, 25oC, CaCl2 처리한 탈염단무지에서 가장 큰 변화(감소)가 나타났다. 미세구조를 관찰한 결과, 탈염과정에서 CaCl2 처리 시 공극이 커져 구조가 상대적으로 엉성해 짐을 확인하였으며, 온도차에 의한 미세구조차이는 육안으로 구별할 수 없었다. 관능검사결과, 조직감 측면에서는 CaCl2 처리하여 탈염한 단무지를 다소 선호하였으나 비처리시료와 유의적 차이는 나타나지 않았다. This study was conducted to evaluate the effects of temperature (5oC & 25oC) and CaCl2 (0.6%, w/w) on the quality properties of salted radish (SR) during desalting period (DP). DP of SR at 5oC was increased by comparison with that of SR at 25oC, and desalting rate of SR at 5oC was reduced greatly at the end of the DP. In viewpoint of hygiene, desalting process of SR at 5oC was better than that of SR at 25oC, and the addition of CaCl2 did not decrease the number of total microorganism. Changes in pH of SR at 5oC were smaller than those of SR at 25oC. There were a little color changes of SR. There was the smallest changes in firmness of SR, which was not treated with CaCl2 at 5oC, and the most significant changes in firmness has occurred that the SR treated with CaCl2 at 25oC. Scanning electron micrographs of SR treated with CaCl2 showed many large holes. Sensory properties showed that there is no significant difference between the texture of SR treated with CaCl2 and not treated.

CaCl_2 및 KCl의 平滑筋收縮에 미치는 Cobalt 이온의 影響

愼弘揆,崔秉周,金重暎 慶北大學校 醫科大學 1985 慶北醫大誌 Vol.26 No.3

CaCl_2 및 KCl에 의한 평활근 수축작용에 미치는 CoCl_2의 영향을 비교하기 위하여 마우스 적출 십이지장을 사용하여 각기 다른 농도의 cobalt존재하에서 CaCl_2(5.3mM) 및 KCl(36mM)을 첨가함으로써 나타나는 수축변화를 관찰하여 다음과 같은 결과를 얻었다. CaCl_2에 의하여 야기되는 초기회복은 cobalt 200uM 존재하에서 64%의 감소를 나타내었고 후기회복은 cobalt 100 및 200uM 존재하에서 각각 68%, 84%의 현저한 감소를 나타내었다. KCl에 의하여 야기되는 phasic 수축은 고농도(100uM)의 CoCl_2존재하에서 81%의 유의한 감소를 나타내었고 tonic 수축은 고농도(100uM) 및 저농도(50uM, 25uM)에서 각각 87%의 감소 및 33%, 30%의 감소를 나타내었다. 이상의 결과로 미루어 보아 cobalt ion에 의한 CaCl_2 및 KCl의 평활근 수축 변화는 cobalt 이온이 외부 calcium의 유입을 억제하고 이로 인한 세포 내부에서의 유리도 억제하여 세포내 calcium 농도의 변화를 나타내지 않기 때문에 평활근의 수축이 감소되어 지는 것으로 보여진다. The effect of various concentrations of CoCl_2 on smooth musle contraction induced by the addition of CaCl to calcium-free Tyrode's solution and the addition of KCl to normal Tyrode's solution was observed in the isolated rat duodenal strip at 37-38℃. The percentae changes of contraction induced by the addition of CaCl_2(5.3mM) and KCl(36mM) in the presence of CoCl_2 at various concentrations were as follows. The early stage of restoration induced by the addition of CaCl_2 to calcium-free solution was decreased by 64% in the presence of 200㎛ of CoCl_2 and the late stage of restoration was decreased by 69% and 84%, respectively, in the presence of 100 and 200uM of CoCl_2. The phasic contraction induced by KCl-addition was decreased by 81% in the presence of 100uM CiCl_2 and tonic contraction was decreased by 31%, 33%, and 87%, respectieely, in the presence of 25uM, 50uM, and 100uM of CoCl_2. These results suggest that CoCl_2 inhibits caclium influx induced by the addition of CaCl_2 and KCl.

Water adsorption capacity enhancement of ferroaluminophosphate (FAPO₄-5) by impregnation of CaCl₂

Truong, Bao Nguyen,Park, Jeasung,Kwon, Oh Kyung,Park, In Elsevier 2018 Materials Letters Vol.215 No.-

<P><B>Abstract</B></P> <P>New composite materials were prepared by impregnating CaCl<SUB>2</SUB> into FAPO<SUB>4</SUB>-5 to enhance the water adsorption capacity of the FAPO<SUB>4</SUB>-5 and limit the deliquescence of CaCl<SUB>2</SUB>. The structure of the FAPO<SUB>4</SUB>-5 was not changed after impregnation, as confirmed by the corresponding X-ray diffraction (XRD) patterns. The composite materials exhibited enhanced water adsorption capacity (up to 08 g/g-sorbent at 50.0 wt% loading) within the working relative pressure range of water vapor of adsorption heat pump (AHP) systems (0.1–0.3 of water vapor relative pressure). The composite material with CaCl<SUB>2</SUB> loading up to 15.9 wt% can also minimizes deliquescence of the salt which is not preferable in AHP applications. Despite partial pore filling of CaCl<SUB>2</SUB> in the matrix, the adsorption capacities of the composites were comparable to the sum of the adsorption capacities of CaCl<SUB>2</SUB> and FAPO<SUB>4</SUB>-5 without significantly affecting that of the pristine FAPO<SUB>4</SUB>-5.</P> <P><B>Highlights</B></P> <P> <UL> <LI> New material FAPO-CSPM was synthesized by impregnation CaCl<SUB>2</SUB> into FAPO<SUB>4</SUB>-5. </LI> <LI> FAPO-CSPM showed highly enhancement regarding to water sorption. </LI> <LI> FAPO-CSPM showed a combination in water sorption capacity of the components. </LI> <LI> FAPO-CSPM showed ability to minimize the deliquescence of CaCl<SUB>2</SUB>. </LI> </UL> </P>

암사슴의 뿔 발생 인공 유도가 번식에 미치는 영향

김상우,서길웅,상병찬,이규승 충남대학교 농업과학연구소 2007 농업과학연구 Vol.34 No.1

This study was conducted to investigate the antler induction rate and production by artificial induction of antlerogenesis using CaCl_(2) injection on both periosteum around area of horn development for the frontal bone of a female elk deer which do not have an antler. The results obtained from eleven deers for verifying effect of the female's antler induction on reproduction are as follows: The antler development induction by CaC1_(2) injection is higher on the treatments of 30 and 50 % of CaCl_(2) injection than those on the treatments of 15 %. The antler production is higher on the 30 % CaCl_(2) injection than those of 15 and 50 % CaCl_(2) injection. For 30 % CaCl_(2) injection, the antler production is higher in 1.5 and 2.0 ml of % CaCl_(2) injection than the other injection level. After the induction of antler development, the birth rate is not changed as of 75-100 %, while the regeneration rate of the antler which was not constant in approximately 45 % for five among eleven female deer. With these results, we assume that the injection concentration and amount of CaCl_(2) injection are around 30 % and 1.5 and 2.0 ml level which can be not only most effective conditions for the antler induction rate and production, but also these conditions do not influence the reproduction during the period of the female elk's antler development induction.

One-step fabrication of nickel nanocones by electrodeposition using CaCl₂·2H₂O as capping reagent

Lee, Jae Min,Jung, Kyung Kuk,Lee, Sung Ho,Ko, Jong Soo Elsevier 2016 APPLIED SURFACE SCIENCE - Vol.369 No.-

<P><B>Abstract</B></P> <P>In this research, a method for the fabrication of nickel nanocones through the addition of CaCl<SUB>2</SUB>·2H<SUB>2</SUB>O to an electrodeposition solution was proposed. When electrodeposition was performed after CaCl<SUB>2</SUB>·2H<SUB>2</SUB>O addition, precipitation of the Ni ions onto the (200) crystal face was suppressed and anisotropic growth of the nickel electrodeposited structures was promoted. Sharper nanocones were produced with increasing concentration of CaCl<SUB>2</SUB>·2H<SUB>2</SUB>O added to the solution. Moreover, when temperature of the electrodeposition solutions approached 60°C, the apex angle of the nanostructures decreased. In addition, the nanocones produced were applied to superhydrophobic surface modification using a plasma-polymerized fluorocarbon (PPFC) coating. When the solution temperature was maintained at 60°C and the concentration of the added CaCl<SUB>2</SUB>·2H<SUB>2</SUB>O was 1.2M or higher, the fabricated samples showed superhydrophobic surface properties. The proposed nickel nanocone formation method can be applied to various industrial fields that require metal nanocones, including superhydrophobic surface modification.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Nickel nanocones were formed using electrodeposition solution with CaCl<SUB>2</SUB>·2H<SUB>2</SUB>O. </LI> <LI> Sharper nanocones were formed with increasing CaCl<SUB>2</SUB>·2H<SUB>2</SUB>O concentration. </LI> <LI> Apex angles of nanocones decreased when solution temperature approached 60°C. </LI> <LI> The nickel nanocones assume a superhydrophobic surface after chemical treatment. </LI> </UL> </P>

탈염과정 중 온도 및 염화칼슘이 단무지 품질에 미치는 영향

심정석 ( Jung Seok Shim ),최원석 ( Won Seok Choi ) 한국산업식품공학회 2012 산업 식품공학 Vol.16 No.4

This study was conducted to evaluate the effects of temperature (5oC & 25oC) and CaCl2 (0.6%, w/w) on the quality properties of salted radish (SR) during desalting period (DP). DP of SR at 5oC was increased by comparison with that of SR at 25oC, and desalting rate of SR at 5oC was reduced greatly at the end of the DP. In viewpoint of hygiene, desalting process of SR at 5oC was better than that of SR at 25oC, and the addition of CaCl2 did not decrease the number of total microorganism. Changes in pH of SR at 5oC were smaller than those of SR at 25oC. There were a little color changes of SR. There was the smallest changes in firmness of SR, which was not treated with CaCl2 at 5oC, and the most significant changes in firmness has occurred that the SR treated with CaCl2 at 25oC. Scanning electron micrographs of SR treated with CaCl2 showed many large holes. Sensory properties showed that there is no significant difference between the texture of SR treated with CaCl and not treated.

Synthesis and Characterization of FAPO4-5/CaCl2 Composites Materials

박제성,장세훈,도지윤,권오경,박인 한국공업화학회 2015 한국공업화학회 연구논문 초록집 Vol.2015 No.0

A new group of composite materials, FAPO4-5/CaCl2 with various ratios, has been synthesized by physical mixing of FAPO4-5 with saturated aqueous solution of CaCl2. The FAPO4-5/CaCl2 composites synthesis by a spray drying method has been tried. The FAPO4-5/CaCl2 composites were characterized by several techniques such as scanning electron microscope (SEM), N2 and water adsorption analyses. The FAPO4-5/CaCl2 composites exhibit a high water vapor adsorption capacity up to ~900 mg/g-sorbent at P/P0 < 0.3. The composites will be coated on heat exchangers and water vapor adsorption-desorption performance will be examined in an adsorption air-conditioning system.

2021년 봄철 흡습성 에어로졸 입자의 시딩에 의한 인공증우 효과 및 민감도 분석

강채연,송상근,문수환,임윤규,장기호,채상희 한국대기환경학회 2023 한국대기환경학회지 Vol.39 No.3

This study investigated the seeding effect of hygroscopic aerosol particles (CaCl2 and NaCl) on artificial rainfall enhancement (ARE) around the Boryeong Dam (BRD) region located in Chungnam Province in spring (April) 2021. In addition, a sensitivity analysis on the ARE changes caused by the changes in seeding duration and amount of CaCl2 and NaCl was conducted in the study area. This analysis was performed by two sets of simulation experiments: (1) meteorological model simulation with (i.e., SEED) and (2) without a modified Morrison microphysics scheme for CaCl2 and NaCl (i.e., UNSD). The model study indicated the possibility that the seeding of hygroscopic materials around the BRD can affect the ARE in its surrounding/downwind regions. The mean 180 min-accumulated ARE between the SEED and UNSD (SEED-UNSD) due to CaCl2 seeding was 0.44 mm in the study area (15.5% increase relative to 2.84 mm of the UNSD), with the largest ARE of 2.95 mm (35.5% increase relative to 8.32 mm) in regions located northeast of the BRD along southwesterly winds. For NaCl, the mean 180 min-accumulated ARE was 0.47 mm (16.9% increase relative to 2.77 mm), with the largest ARE of 3.93 mm (43.4% increase relative to 9.04 mm) in the same region as CaCl2. The magnitudes of 60 min- and 120 min-accumulated AREs were smaller than those of the 180 min-accumulated ARE. In the sensitivity analysis, the increases in CaCl2 seeding duration (2- and 3-fold) resulted in significant changes (a factor of 3 increase) in the mean 180 min-accumulated ARE in the study area, but there were no distinct changes in case of increased NaCl seeding duration. Unlike the seeding duration, the AREs of both CaCl2 and NaCl were not sensitive to increases in their seeding amount (2- and 3-fold), possibly due to overseeding.

Implications of CaCl₂ application to plants in LID facilities

Choi, H. S.,Hong, J. S.,Geronimo, F. K. F.,Kim, L. H. IWA Publishing 2018 Water Science & Technology Vol.78 No.5

<P>Low impact development (LID) technologies mimic the natural water cycle through the physico-chemical and biological interactions of plants, filter media and soil, and microorganisms, thereby reducing the release of pollutants. In LID facilities, plants carry out photosynthesis, facilitate microbial growth, and uptake pollutants contained in stormwater runoff. However, de-icers (CaCl<SUB>2</SUB>) used to melt snow during winter slow the growth of plants and even increase plant mortality. In addition, de-icers change the soil structure, causing changes in soil content and affecting the growth of plants and microorganisms. Therefore, this study examined the effects of CaCl<SUB>2</SUB> on the resistance of plants, the removal efficiency of non-point source pollutants, and water circulation. The mortality rate of the tree and shrubs caused by CaCl<SUB>2</SUB> was found to be in the order of <I>Rhododendron indicum</I> > <I>Spiraea prunifolia</I> var. <I>simpliciflora</I> > <I>Metasequoia glyptostroboides</I>. For herbaceous plants, mortality rate was in the order of <I>Pratia pedunculata</I> > <I>Aquilegia japonica</I> > <I>Tagetes erecta</I> > <I>Sedum makinoi aurea</I> > <I>Hosta longipes</I> > <I>Dianthus chinensis</I> > <I>Acorus gramineus</I> > <I>Liriope platyphylla</I>. In addition, it was found that the amount of chlorophyll decreases with high concentrations of CaCl<SUB>2</SUB>. The findings of this research will be useful for plant selection considering CaCl<SUB>2</SUB> concentrations applied to paved areas during the winter.</P>

발모법과 CaCl2 용액 분리법에 의한 원형 탈모증 모근의 비교 관찰

곽은희(Eun Hee Kwark),서재일(Jae Il Suh),임철완(Chull Wan Ihm) 대한피부과학회 1987 대한피부과학회지 Vol.25 No.1

Observation of hair roots by simple plucking is a comnon methad in trichology. But the plucking method is subject to artificial deformation of hair roots during the procedure and the possibility of the artifact may be greater when hair roots are in pathological state. Treatment of the scalp tissue with 1 M CaC12 permits epidermodermal separation and subsecuent harve.sting of hair follicles without any damage on the structures. To make sure if the possible artificial deformation of the hair roots of plucking method could affect significantly the overall evaluation of the hairs in alopecia areata, authors compared the results of plucking method(total 171 hair roots) with the results of CaCl2 method(total l94 roots) in 15 cases of alopecia areata. The sites of taking hair roots by the two rnethocds were located side by side at the edges of the bald areas. The results were as frllows: 1. The average percentages of actual dystrophic hairs in 15 alopecia areat.a patients are 55% by plucking method and 53% by CaCl2, method, thus showing no significant difference in overall evaluation of the hair roots. 2. The shapes of proximal hair shafts obtained by plucking were similar with the shape obtained by CaCl2 method.