http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Catechol-Functionalized Chitosan/Pluronic Hydrogels for Tissue Adhesives and Hemostatic Materials
Ryu, Ji Hyun,Lee, Yuhan,Kong, Won Ho,Kim, Taek Gyoung,Park, Tae Gwan,Lee, Haeshin American Chemical Society 2011 Biomacromolecules Vol.12 No.7
<P>Bioinspired from adhesion behaviors of mussels, injectable and thermosensitive chitosan/Pluronic composite hydrogels were synthesized for tissue adhesives and hemostatic materials. Chitosan conjugated with multiple catechol groups in the backbone was cross-linked with terminally thiolated Pluronic F-127 triblock copolymer to produce temperature-sensitive and adhesive sol–gel transition hydrogels. A blend mixture of the catechol-conjugated chitosan and the thiolated Pluronic F-127 was a viscous solution state at room temperature but became a cross-linked gel state with instantaneous solidification at the body temperature and physiological pH. The adhesive chitosan/Pluronic injectable hydrogels with remnant catechol groups showed strong adhesiveness to soft tissues and mucous layers and also demonstrated superior hemostatic properties. These chitosan/Pluronic hydrogels are expected to be usefully exploited for injectable drug delivery depots, tissue engineering hydrogels, tissue adhesives, and antibleeding materials.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/bomaf6/2011/bomaf6.2011.12.issue-7/bm200464x/production/images/medium/bm-2011-00464x_0008.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/bm200464x'>ACS Electronic Supporting Info</A></P>
Response regulator dr1558이 발현된 재조합 대장균을 이용한 목재 가수분해물로부터 poly(3-hydroxybutyrate)의 생산
공류경(Ryu-gyoung Gong),최준호(Jun-ho Choi),이재원(Jae-won Lee),김태완(Tae Wan Kim),최종일(Jong-il Choi) 한국생물공학회 2020 KSBB Journal Vol.35 No.2
In this study, wood hydrolysate was added in MR medium for the economical production of poly (3-hydroxybutyrate) by recombinant Escherichia coli. When response regulator dr1558 from Deinococcus radiodurans was overexpressed along with PHB biosynthesis genes, recombinant E. coli XB (pKM212_CnCAB+pRadGro_dr1558) had higher cell concentration and PHB content compared to control strain E. coli XB (pKM212_CnCAB+ pRadGro). From the transcriptional analysis by quantitative real time PCR, some genes involved in TCA cycle and PHB biosynthesis were overexpressed in E. coli XB (pKM212_CnCAB+pRadGro_dr1558). This results will be useful for production of biochemicals from cheap hydrolysate by fermentation process.
Choi, Yun Mi,Kim, Won Gu,Kwon, Hyemi,Jeon, Min Ji,Lee, Jong Jin,Ryu, Jin-Sook,Hong, Eun-Gyoung,Kim, Tae Yong,Shong, Young Kee,Kim, Won Bae European Federation of Endocrine Societies 2016 European journal of endocrinology Vol.175 No.3
<P>Objective: Bone is the second most common site of distant metastases from differentiated thyroid cancer (DTC). Patients with bone metastases were associated with poor clinical outcomes; however, their clinical courses are heterogeneous. The aim of this study is to evaluate early prognostic factors of patients with bone metastases from DTC at the time of diagnosis of bone metastasis. Methods: This retrospective study included 93 patients with bone metastases from DTC. We defined 'Pre-RAIT group' as patients whose bone metastases were detected before initial RAIT. The 'post-RAIT group' was defined as patients whose bone metastases were detected after initial RAIT or during the follow-up period. Results: Median age was 55.4 years, and 55 patients (59%) had papillary thyroid cancer. Patients in the pre-RAIT group (n = 32) demonstrated significantly poorer overall survival (OS) (HR = 1.86, P = 0.04) than those in the post-RAIT group. There was no significant difference in the OS according to the initial RAI avidity among all patients (P = 0.18). RAI-avid bone metastases had better OS only in the pre-RAIT group (HR = 0.23, P = 0.01) but not in the post-RAIT group. In the post-RAIT group, older age (> 45 years), elevated serum thyroglobulin (Tg) level (> 250 ng/mL), and the presence of skeletal-related events (SREs) were significantly associated with poor OS. RAI avidity was not a significant prognostic factor in the post-RAIT group (P = 0.33). Conclusions: Patients whose bone metastases were diagnosed before initial RAIT demonstrate a poorer prognosis. RAI avidity is an early prognostic indicator in the pre-RAIT group. Old age, higher serum Tg levels, and SRE are associated with poor survival outcomes in the post-RAIT group.</P>
류경원,장영남,배인국,서용재,Ryu, Gyoung-Won,Jang, Young-Nam,Bae, In-Kook,Suh, Yong-Jae 대한자원환경지질학회 2008 자원환경지질 Vol.41 No.2
비정질 $SiO_2$와 $Al(OH)_3$를 출발물질로 이용하여 250$^{\circ}C$, $30kg/cm^2$의 조건에서 pH를 2${\sim}$9까지 변화시키면서 캐올리나이트를 수열합성하였다. 합성 캐올리나이트는 XRD, FT-IR, TG, DTA, 및 FE-SEM을 사용하여 광물학적 특성 분석을 실시하였으며, 이로부터 캐올리나이트 합성시 pH의 변화에 따른 영향력을 관찰하였다. 실험결과, 산성조건에서 중-저 결함도와 높은 열적 안정성을 갖는 양호한 캐올리나이트가 합성되었으며, 알카리성 조건에서는 결함이 많은 캐올리나이트가 합성되었다. 이러한 현상은 합성 캐올리나이트의 표면특성이 pH에 의존하기 때문인 것으로 보인다. FT-IR 분석결과, 반응용액의 알칼리도가 증가함에 따라 합성 캐올리나이트의 피크 강도와 분해도가 감소되었으며, TG-DTA 분석결과, 60-70$^{\circ}C$의 저온영역에서의 탈수현상에 의한 피크 강도 증가가 관찰되었다. 이러한 결과는 pH의 증가에 따라 반응에 참여하지 못한 비정질 물질의 양이 증가하기 때문이며 FE-SEM 분석에 의해 확인되었다. Kaolinite [$Al_2Si_2O_5(OH)_4$] used in these experiments was synthesized at 250$^{\circ}C$ for 36 hrs by a hydrothermal process from amorphous $Al(OH)_3$ and $SiO_2$. The change of the mineralogical properties of the phase synthesized were observed in the pH range 2 to 9. The synthetic kaolinite were characterized by the analytical methods of XRD, IR, DIA, and FE-SEM. Kaolinite was obtained in a wide range of pH. The phases with high- to midium- defect kaolinite with high thermal stability were obtained from the acidic conditions and high-defect kaolinite with low thermal stability from the basic conditions. These variations of kaolinite properties appears to be related to the pH dependence of kaolinite surface speciation. The peaks intensity and resolution of the kaolinite decrease according to the alkalinity of the solution by the results of the IR testing. And the peak intensity increases in the 60 to 70$^{\circ}C$ range due to dehydration reaction observed by TG-DTA. Such phenomena was the result of increase of unreacted amorphous materials in the high pH condition, which could be identified by FE-SEM.