• Title/Summary/Keyword: CR emulsion

Search Result 11, Processing Time 0.025 seconds

Emulsification of Chloroprene Rubber (CR) by Interfacial Chemistry; Stabilization and Enhancement of Mechanical Properties

  • Lee, Eun-Kyoung
    • Elastomers and Composites
    • /
    • v.52 no.4
    • /
    • pp.257-265
    • /
    • 2017
  • In this work, CR (Chloroprene Rubber) was emulsified by phase-inversion emulsification with nonionic surfactants (NP-1025, LE-1017, and OP-1019) and an anionic surfactant (SDBS; sodium dodecylbenzenesulfonate), and its stabilization was investigated through a study of its adsorption characteristics, zeta potential, and flow behavior. As the amount of the mixed surfactant increased, the droplet size decreased, resulting in the increase of viscosity. In particular, a CR emulsion with a lower absorbance in the UV spectrum exhibited the highest zeta potential. The results of this experiment showed that the CR emulsion prepared using (LE-1017) and SDBS was the most stable. In this study, calcium hydroxide and aluminum hydroxide were added to enhance the mechanical properties of the CR emulsion, and the relationship between tensile strength, tear strength and surface free energy were investigated. The tensile and tear strengths of the CR emulsion incresed as the amount of calcium hydroxide and aluminum hydroxide increased. The highest tensile and tear strengths and surface free energy were observed for additions of 1.0% calcium hydroxide and 0.80% aluminum hydroxide, respectively. It was concluded that the interfacial bonding strength was improved by the even dispersion of calcium hydroxide and aluminum hydroxide in the CR emulsion.

Formula Optimization of a Perilla-canola Oil (O/W) Emulsion and Its Potential Application as an Animal Fat Replacer in Meat Emulsion

  • Utama, Dicky Tri;Jeong, Haeseong;Kim, Juntae;Lee, Sung Ki
    • Food Science of Animal Resources
    • /
    • v.38 no.3
    • /
    • pp.580-592
    • /
    • 2018
  • The formulation of an oil/water (o/w) emulsion made up of a mixture of perilla oil and canola oil (30/70 w/w) was optimized using a response surface methodology to find a replacement for animal fat in an emulsion-type meat product. A 12 run Plackett-Burman design (PBD) was applied to screen the effect of potential ingredients in the (o/w) emulsion, including polyglycerol polyricinoleate (PGPR), fish gelatin, soy protein isolate (SPI), sodium caseinate, carrageenan (CR), inulin (IN) and sodium tripolyphosphate. The PBD showed that SPI, CR and IN showed promise but required further optimization, and other ingredients did not affect the technological properties of the (o/w) emulsion. The PBD also showed that PGPR played a critical role in inhibiting an emulsion break. The level of PGPR was then fixed at 3.2% (w/w total emulsion) for an optimization study. A central composite design (CCD) was applied to optimize the addition levels of SPI, CR or IN in an (o/w) emulsion and to observe their effects on emulsion stability, cooking loss and the textural properties of a cooked meat emulsion. Significant interactions between SPI and CR increased the cooking loss in the meat emulsion. In contrast, IN showed interactions with SPI leading to a reduction in cooking loss. Thus, CR was also removed from the formulation. After optimization, the level of SPI (4.48% w/w) and IN (14% w/w) was validated, leading to a perilla-canola oil (o/w) emulsion with the ability to replace animal fat in an emulsion-type meat products.

MR Spectroscopy of Cerebral Fat Embolism in Cats

  • Park Byung-Rae
    • Biomedical Science Letters
    • /
    • v.11 no.2
    • /
    • pp.221-225
    • /
    • 2005
  • To investigate the spectroscopic findings of embolized lesions induced with a fat-emulsion technique with magnetic resonance images (MRI). A fat emulsion was made with 0.1 ml of triolein and 20 ml of normal saline. In 12 cats, the internal carotid artery was infused with the fat emulsion. Contrast-enhanced T1-weighted MRI and multivoxel spectroscopy were obtained at 1 hour, 1 and 4 days, and 1 week after embolization. NAA (N-acetylaspartate), Cr (creatine) and Cho (choline) were evaluated on the spectroscopy. Statitistical analysis wsperformed at the embolized and contralateral normal hemisphere in the integral and amplitude of NAA, Cr and Nho in time course. Also NAA/Cr and Cho/Cr were compared in both hemisphere and in time course. The emboli zed lesions showed contrast enhance ments on Gd-enhanced Tl-weighted i~ages at 1 hour. This contrast enhancement was decreased at day 1, and id not appear agter day 4. In spectroscopy, the embolized hemisphere showed no statistical difference to the normal contralateral side at 1 hour and in time course. NAA/Cr and Cho/Cr were not significantly different in both hemispheres at 1 hour and in time course. Cerebral-fat embolism induced by a triolein emulsion in cats revealed no statistical difference on MR spectroscopy. Triolein-emulsion can be used in the study of blood-brain barrier.

  • PDF

An Experimental Study on the Treatment of Waste Ash from the Incinerator by Alkali Soluble Acrylic Copolymer Emulsion (알칼리 용해성 아크릴계 수분산 중합체를 사용한 소각로 비산재의 처리에 관한 실험적 연구)

  • Lee, Hack-Yong;Choi, Sang-Reung;Noh, Jae-Ho;Heo, Hyung-Seok
    • Journal of the Korean Recycled Construction Resources Institute
    • /
    • v.5 no.1
    • /
    • pp.111-116
    • /
    • 2010
  • The treatment of heavy metal, in the waste ash from incinerator and mine solid waste, by using alkali-soluble acrylic copolymer emulsion, that is effective in the absorption of heavy metal has been studied. It seemed that alkali soluble acrylic copolymer emulsion was very effective in the absorption of Hg, Pb, Cd and Cu in this test. Also, eco-friendly thixotropic grout, using alkali soluble acrylic copolymer emulsion, that is effective in the absorption of heavy metal, for the recycling of waste ash from incinerator and mine solid waste has been tested. It was observed that waste ash could be used as a raw material of eco-friendly thixotropic grout mortar due to the effectiveness of alkali soluble acrylic copolymer emulsion in the fixation of heavy metals including $Cr^{6+}$ from waste ash in this test.

  • PDF

PU Midsole용 수성세정제의 성능향상을 위한 첨가제의 영향에 관한 연구

  • Jeong, Gap-Seop;Na, Seok-Eun
    • Proceedings of the Korean Environmental Sciences Society Conference
    • /
    • 2005.05a
    • /
    • pp.316-318
    • /
    • 2005
  • PU midsole세척용 수성세정제로서 Ester구조를 가진 비이온성 계면활성제를 사용하여 limonene을 유화분산하고, 첨가제의 영향을 검토하여 세정효과를 측정한 결과 계면활성제의 사용은 1${\sim}$1.5wt%, limonene은 30wt%의 범위에서 emulsion입경이 최소로서 가장 좋았다. 접착증진제(CR)와 세척향상제(LD)를 합성하고 첨가효과를 검토한 결과 일정 첨가량 이하에서 세정력이 증가하였으며, 두 첨가제를 동시에 적용하여 synergy효과를 확인하였다. 초적의 첨가조건은 CR과 LD를 각각 5wt%와 2wt% 동시 첨가하는 경우로서 세정성능이 40%정도 증가하였다.

  • PDF

Radioactive Seed Implantation and Lobaplatin Chemotherapy Are Safe and Effective in Treating Patients with Advanced Lung Cancer

  • Li, Jia-Rui;Sun, Yu;Liu, Lin
    • Asian Pacific Journal of Cancer Prevention
    • /
    • v.16 no.9
    • /
    • pp.4003-4006
    • /
    • 2015
  • Objecive: To investigate the clinical safety and efficacy of CT-guided $^{125}iodine$ (125I) seed implantation combined with percutaneous intra-tumor injection of chemotherapy emulsion of lobaplatin and lipiodol in treating patients with advanced lung cancer. Materials and Methods: Patients with advanced lung cancer and treated with spiral CT-guided $^{125}I$ seed implantation combined with percutaneous intra-tumor injection of chemotherapy emulsion of lobaplatin and lipiodol were recruited. Results: Of the 36 patients, there were 40 nidi in total. The contrast-enhanced CT evaluation was conducted 60 d after treatment. Response evaluation suggested that 4 patients achieved complete remission (CR), 24 partial remission (PR), 4 stable disease (SD) and 4 progression disease (PD), with a total response rate of 77.8% (28/36). Conclusions: CT-guided $^{125}I$ seed implantation combined with percutaneous intra-tumor injection of chemotherapy emulsion of lobaplatin and lipiodol are safe and effective in treating patients with advanced lung cancer.

Phase II Study on Safety and Efficacy of Yadanzi® (Javanica oil emulsion injection) Combined with Chemotherapy for Patients with Gastric Cancer

  • Liu, Jin;Huang, Xin-En;Tian, Guang-Yu;Cao, Jie;Lu, Yan-Yan;Wu, Xue-Yan;Xiang, Jin
    • Asian Pacific Journal of Cancer Prevention
    • /
    • v.14 no.3
    • /
    • pp.2009-2012
    • /
    • 2013
  • Objective: To investigate the efficacy and safety of Yadanzi$^{(R)}$ (Javanica oil emulsion injection) combined with chemotherapy for treatment of patients with advanced gastric cancer. Methods: From January 2011 to December 2012, we recruited 75 patients with advanced gastric cancer, who received javanica oil emulsion injection together with chemotherapy. After two cycles of treatment, efficacy and safety of the combined therapies were evaluated. Results: Overall response rate of 75 patients after treatment was 85.3% (CR+PR+SD). Treatment related side effects were recorded. No treatment related death occurred. Conclusions: Javanica oil emulsion injection combined with chemotherapy could be considered as a safe and effective regimen in treating patients with advanced gastric cancer. Further randomized clinical trials should be conducted to confirm whether the addition of Yadanzi$^{(R)}$ to chemotheraphy could be associated with reduced toxicity, enhanced tolerability and improved quality of life for patients with advanced gastric cancer.

Phase II Study on Javanica Oil Emulsion Injection (Yadanzi®) Combined with Chemotherapy in Treating Patients with Advanced Lung Adenocarcinoma

  • Lu, Yan-Yan;Huang, Xin-En;Cao, Jie;Xu, Xia;Wu, Xue-Yan;Liu, Jin;Xiang, Jin;Xu, Lin
    • Asian Pacific Journal of Cancer Prevention
    • /
    • v.14 no.8
    • /
    • pp.4791-4794
    • /
    • 2013
  • Purpose: To investigate the efficacy and safety of Javanica oil emulsion injection (Yadanzi$^{(R)}$) combined with pemetrexed and platinum (PP) for treating patients with advanced lung cancer. Patients and Methods: From June 2011 to June 2013, we recruited 58 patients with advanced lung cancer, and divided them into two groups. Twenty eight patients received Yadanzi$^{(R)}$ (from ZheJiang Jiuxu Pharmaceutical Co., Ltd.) together with PP chemotherapy (combined group), while the others were given only PP chemotherapy (control group). After two cycles of treatment, efficacy and safety of treatment were evaluated. Results: The overall respnse rate [(CR+PR+SD)/(CR+PR+SD+PD)] of the combined group was higher than that of control group (89.7% vs. 86.2%, p>0.05). Regarding rate of life improvement, it was 82.8% in combined group, and 51.7% in the control group (p<0.05). In terms of side effects, leukopenia in combined group was less frequent than that in control group (p<0.05). More patients in the control group were found to suffer liver toxicity. Conclusions: Javanica oil emulsion injection combined with chemotherapy could be considered as a safe and effective regimen in treating patients with advanced lung adenocarcinoma. It can improve the quality of life and reduce the possibility of leukopenia. Further clinical trials with a large sample size should be conducted to confirm whether addition of Yadanzi$^{(R)}$ to chemotherapy could increase the response rate, reduce toxicity, enhance tolerability and improve quality of life for patients with advanced lung cancer.

Removal of Cadmium. Copper and Chromium Ions in Aqueous Solution using Water in Oil Micro-Emulsion (W/O 마이크로에멀젼을 이용한 수용액중의 카드뮴, 구리 및 크롬이온의 분리제거)

  • Lee, Sung-Sik;Lee, Eun-Joo;Kim, Hyung-Jun;Kim, Jong-Hwa
    • Journal of Korean Society of Environmental Engineers
    • /
    • v.22 no.6
    • /
    • pp.1021-1026
    • /
    • 2000
  • The removal of cadmium, copper and chromium ions was carried in a phase transfer reactor using W/O(water in oil) microemulsion containing sodium di[2-ethylhexyl] sulfosuccinate(AOT) and isooctane system. Removal efficiencies and mass transfer rate of $Cd^{2+}$, $Cu^{2+}$ and $Cr^{3+}$ were increasing with increasing pH of aqueous solution. However, $Cr^{6+}$ was not extracted by W/O microemulsion with AOT/isooctane system. It was found that removal of heavy metal ions were required an attractive electrostatic interaction between the metal ions and W/O microemulsion. The relationship between mass transfer rate. Jo of $Cd^{2+}$, $Cu^{2+}$ and $Cr^{3+}$ and pH of aqueous solution by W/O microemulsion suggested.

  • PDF

Comparative Study on Compositions and Functional Properties of Porcine, Chicken and Duck Blood

  • Sorapukdee, Supaluk;Narunatsopanon, Supawadee
    • Food Science of Animal Resources
    • /
    • v.37 no.2
    • /
    • pp.228-241
    • /
    • 2017
  • Hematological, chemical and functional characteristics of porcine, chicken and duck blood were evaluated. A porcine blood sample showed the most abundant red blood cell, hemoglobin concentration, packed cell volume and plasma protein content as well as its freeze-dried blood possessed the highest contents of protein, fat, Cu and Cr with the highest percentage of heme iron (p<0.05). Unlike porcine blood, chicken blood showed a well balance in some essential amino acids, specifically for a higher isoleucine content (p<0.05). Furthermore, it possessed the highest contents of carbohydrate, Zn and non-heme iron (p<0.05). The most rapid response to form a strong gel, especially at $70^{\circ}C$ and $80^{\circ}C$, was found in chicken blood, followed by duck and porcine blood, respectively. The result of emulsion activity index (EAI) and emulsion stability index (ESI) at the low protein concentration indicated that chicken blood had the most superior emulsion properties (p<0.05). Regarding duck blood, it exhibited the highest content of Mg and Mn (p<0.05). Moreover, duck blood had similar foaming properties to porcine blood in which they showed higher values than chicken blood (p<0.05). Specific characteristics of blood were therefore diminished by animal species in which this information could be used as food supplementation or product development based on their potential applications.