Production of Dimethylsulfide and Dimethyisulfoniopropionate by Phytoplankton in the Water of Jiaozhou Bay

Huizhen, Zhang,Zhen, Cui,Yizhi, Chen,Wei, Cui,Ping, Sheng,Manping, Zhang 목포해양대학교해사산업기술연구소 1997 심포지움강연논집 Vol.1997 No.11

The concentration of dimethylsulfide (DMS) and its metabolic precursor, dimethylsulfonio propionate (DMSP) in water and particulate samples obtained along transects through Jiaozhou Bay, China was determined. Here we report the distribution, diurnal change and seasonal variation of DMS and DMSP in water of Jiaozhous Bay and the adjacent area, including some of the biogeochemical factors controlling the distribution, change and variation. Eight individual clones of phytoplankton representing four classes were examined in exponential growth for DMS and KMSP by laboratory batch cultures. There is a strong correlation between the taxonomic position of the phytoplankton and the production of DKSP(DMS). The DMS and DMSP variation in growth and with variations in nutrient and salinity were reported.

Muslin Deweaving through Combined Mechanical, Thermal and Chemical Methods

Hang Zhang Cao,Jamie DeCoster,Jamie DeCoster,Kelvin Linskens,Kareem Mehdi,Yizhi Meng,Gary Halada,Hye-Jung Jung,Theanne Schiros,Asta Skocir,Taejin Kim 한국섬유공학회 2022 Fibers and polymers Vol.23 No.11

Fabric waste has become an escalating problem that stems from the ever-shortening clothing lifecycle. Previouscotton recycling processes used mechanical methods to break the cotton down into fiber; this comes at the cost ofcompromised strength. Sodium hydroxide has long been used in the textile industry to increase dye absorption and lusterthrough mercerization. In this paper, the deweaving of cotton muslin fabric was attempted using the chemical interactions ofNaOH in combination with heat and mechanical forces through agitation. Different NaOH concentrations were tested todetermine the optimum condition for fabric decomposition on a laboratory scale. Overall, the muslin fabric treatment with0.5 M NaOH yielded the most promising results for fiber quality retention and chemical usage. The NaOH solution wasshown to be feasible in effectively deweaving multiple muslin fabrics consecutively. While the deweaving process reducesthe mechanical strength of the fabric, overall, the recycling method was successful in minimizing chemical waste anddeweaving time.

Quantum Chaotic Image Encryption with One Time Running Key

Cao Guanghui,Zhou Jun,Zhang Yizhi,Jiang Yueling,Zhang Xing 보안공학연구지원센터 2014 International Journal of Security and Its Applicat Vol.8 No.4

Epidemiology and resistance features of Acinetobacter baumannii isolates from the ward environment and patients in the burn ICU of a Chinese hospital

Yali Gong,Xiaodong Shen,Guangtao Huang,Cheng Zhang,Xiaoqiang Luo,Supeng Yin,Jing Wang,Fuquan Hu,Yizhi Peng,Ming Li 한국미생물학회 2016 The journal of microbiology Vol.54 No.8

Acinetobacter baumannii is an important opportunistic pathogen that causes severe nosocomial infections, especially in intensive care units (ICUs). Over the past decades, an everincreasing number of hospital outbreaks caused by A. baumannii have been reported worldwide. However, little attention has been directed toward the relationship between A. baumannii isolates from the ward environment and patients in the burn ICU. In this study, 88 A. baumannii isolates (26 from the ward environment and 62 from patients) were collected from the burn ICU of the Southwest Hospital in Chongqing, China, from July through December 2013. Antimicrobial susceptibility testing results showed that drug resistance was more severe in isolates from patients than from the ward environment, with all of the patient isolates being fully resistant to 10 out of 19 antimicrobials tested. Isolations from both the ward environment and patients possessed the β-lactamase genes blaOXA-51, blaOXA-23, blaAmpC, blaVIM, and blaPER. Using pulsed-field gel electrophoresis (PFGE) and multi-locus sequence typing (MLST), these isolates could be clustered into 4 major PFGE types and 4 main sequence types (ST368, ST369, ST195, and ST191) among which, ST368 was the dominant genotype. Epidemiologic and molecular typing data also revealed that a small-scale outbreak of A. baumannii infection was underway in the burn ICU of our hospital during the sampling period. These results suggest that dissemination of β-lactamase genes in the burn ICU might be closely associated with the high-level resistance of A. baumannii, and the ICU environment places these patients at a high risk for nosocomial infection. Cross-contamination should be an important concern in clinical activities to reduce hospital acquired infections caused by A. baumannii.

A novel ethylene-responsive factor IbERF4 from sweetpotato negatively regulates abiotic stress

Yu Yang,김호수,Ma Peiyong,Jia Zhaodong,Guo Xiaoding,Xie Yizhi,곽상수,Zhang Peng,Bian Xiaofeng 한국식물생명공학회 2020 Plant biotechnology reports Vol.14 No.4

The ERF (ethylene-responsive element-binding factor) transcription factor family plays important roles in abiotic and biotic stress responses in plants. An EAR motif-containing ERF gene, IbERF4, was isolated from sweetpotato [Ipomoea batatas (L.) Lam]. IbERF4 was highly expressed in the early stage of storage roots and can be induced by various stresses. By overexpressing IbERF4 in Arabidopsis, the transgenic Arabidopsis showed greater sensitivity to drought and salt stress by down-regulating stress-related genes, such as rd22, rd29, AtCBF1 and AtCBF2. Overexpressing IbERF4 in sweetpotato made the transgenic sweetpotato more sensitive to salt stress and made propagating new seedlings more difficult. Consistently, the transcriptomic profiling results showed that genes involved in oxidative stress were significantly down-regulated in sweetpotato overexpression lines. These results indicated that IbERF4 plays as key regulators in sweetpotato abiotic stress.

여름철 기온상승에 대한 주관감과 의복선택변화 실태조사 ╶ 한국 거주중인 한인ㆍ중국인 성인여성을 대상으로╶

김정연(Jeong Yeon Kim),최서영(Seo Young Choi),왕이지(yizhi Wang),장몽(meng Zhang),김재영(Jae Young Kim) 경희대학교 산학협력단 예술디자인연구원 2017 예술· 디자인학연구 Vol.20 No.2

이 연구에서는 기온상승 시 의복선택이 어떻게 변화하는지 파일럿 설문조사를 실시하였다. 설문대상은 한국에 거주하는 성인여성 114명이었다. 설문내용은 여름철 기온상승 및 여름철 의복선택변화정도에 대한 주관감(7점 척도), 의복ㆍ헤어스타일ㆍ신의 구체적 선택변화에 대한 yes/no 문항으로 이루어졌다. (A)여름철 기온상승에 대한 정적 주관감은 86.8%였고, (B)여름철의복선택변화 정도에 대한 정적 주관감은 86.0%였다. (A)와 (B) 사이의 상관계수는 0.579(p=.001)였다. 여름철 의복선택변화에 대한 yes/no 설문에서 50%의이상의 yes 응답을 얻은 문항들은 다음과 같았다: ‘민소매/어깨오픈 소매를 선호하게 됨’, ‘바지보다 스커트를 선호하게 됨’, ‘바지/스커트를 더 짧게 착용하게 됨’, ‘스타킹 착용을 하지 않게 됨’, ‘시원한 소재의 의복을 선택하게 됨’, ‘한 겹 의류 착용을 선호하게 됨’, ‘시원해 보이는 칼라의 의복을 선호하게 됨’, ‘포니테일을 선호하게 됨’, ‘샌들 착용을 선호하게 됨’, ‘풋케어에 더욱 관심을 가지게 됨’. 여름철 기온증가현상이 매년 지속될 경우 의복의 형태변화가 예견되기 때문에기후변화에 대한 주관감과 의복행동과의 관련성에 대한 분석과 의복선택변화에 대한 적절한 예측은 의류산업발전과 인체환경적응연구에 기여할 것이다. In this study, pilot surveys were conducted to investigate the change of clothing selection during the temperature rise. The subjects of this study were 114 adult women living in Korea. The questionnaire consisted of subjective sensation about summer temperature rise and about change of clothing selection in summer(7 point method), yes/no question about change of clothes/ hair-style/ shoes. (A)Positive sensation of summer temperature rise was 86.8%. (B)Positive sensation of degree of change of clothing selection in summer was 86.0%. The correlation coefficient between (A) and (B) was 0.579(p=.001). In the yes/no questionnaire for change of clothing choice in the summer, the questions with more than 50% yes response were as follows: 'prefer sleeveless or shoulder open sleeves', 'prefer skirts to pants', 'wear pants or skirts shorter', 'dislike stockings', 'prefer cooler clothing', 'prefer to wear one layer of clothing', ‘prefer the clothes of color that looked cool’, ‘prefer ponytail', ’increased wear of sandals', and 'interest in foot care‘. If summer temperature increases every year, the change in clothing choice is predicted. The appropriate prediction of clothing selection change will contribute to the development of apparel industry and adaptation to the thermal environment.

Reactive Oxygen Species Scavenging Hydrogel Regulates Stem Cell Behavior and Promotes Bone Healing in Osteoporosis

Ye Yuanjian,Zhong Haobo,Huang Shoubin,Lai Weiqiang,Huang Yizhi,Sun Chunhan,Zhang Yanling,Zheng Shaowei 한국조직공학과 재생의학회 2023 조직공학과 재생의학 Vol.20 No.6

BACKGROUND: Implantation of bone marrow mesenchymal stem cells (BMSCs) is a potential alternative for promoting bone defects healing or osseointegration in osteoporosis. However, the reactive oxygen species (ROS) accumulated and excessive inflammation in the osteoporotic microenvironment could weaken the self-replication and multi-directional differentiation of transplanted BMSCs. METHODS: In this study, to improve the hostile microenvironment in osteoporosis, Poloxamer 407 and hyaluronic acid (HA) was crosslinked to synthetize a thermos-responsive and injectable hydrogel to load MnO2 nanoparticles as a protective carrier (MnO2@Pol/HA hydrogel) for delivering BMSCs. RESULTS: The resulting MnO2@Pol/HA hydrogel processed excellent biocompatibility and durable retention time, and can eliminate accumulated ROS effectively, thereby protecting BMSCs from ROS-mediated inhibition of cell viability, including survival, proliferation, and osteogenic differentiation. In osteoporotic bone defects, implanting of this BMSCs incorporated MnO2@Pol/HA hydrogel significantly eliminated ROS level in bone marrow and bone tissue, induced macrophages polarization from M1 to M2 phenotype, decreased the expression of pro-inflammatory cytokines (e.g., TNFa, IL-1b, and IL-6) and osteogenic related factors (e.g., TGF-b and PDGF). CONCLUSION: This hydrogel-based BMSCs protected delivery strategy indicated better bone repair effect than BMSCs delivering or MnO2@Pol/HA hydrogel implantation singly, which providing a potential alternative strategy for enhancing osteoporotic bone defects healing.

Integration and long distance axonal regeneration in the central nervous system from transplanted primitive neural stem cells.

Zhao, Jiagang,Sun, Woong,Cho, Hyo Min,Ouyang, Hong,Li, Wenlin,Lin, Ying,Do, Jiun,Zhang, Liangfang,Ding, Sheng,Liu, Yizhi,Lu, Paul,Zhang, Kang American Society for Biochemistry and Molecular Bi 2013 The Journal of biological chemistry Vol.288 No.1

<P>Spinal cord injury (SCI) results in devastating motor and sensory deficits secondary to disrupted neuronal circuits and poor regenerative potential. Efforts to promote regeneration through cell extrinsic and intrinsic manipulations have met with limited success. Stem cells represent an as yet unrealized therapy in SCI. Recently, we identified novel culture methods to induce and maintain primitive neural stem cells (pNSCs) from human embryonic stem cells. We tested whether transplanted human pNSCs can integrate into the CNS of the developing chick neural tube and injured adult rat spinal cord. Following injection of pNSCs into the developing chick CNS, pNSCs integrated into the dorsal aspects of the neural tube, forming cell clusters that spontaneously differentiated into neurons. Furthermore, following transplantation of pNSCs into the lesioned rat spinal cord, grafted pNSCs survived, differentiated into neurons, and extended long distance axons through the scar tissue at the graft-host interface and into the host spinal cord to form terminal-like structures near host spinal neurons. Together, these findings suggest that pNSCs derived from human embryonic stem cells differentiate into neuronal cell types with the potential to extend axons that associate with circuits of the CNS and, more importantly, provide new insights into CNS integration and axonal regeneration, offering hope for repair in SCI.</P>