http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Nitrate-Metabolic Characteristic of Mesophilic Nitrite Producer Bacteria Isolated from Baby Food
Seon Gyeong Park,Sun Min Park,Min Suk Rhee 한국식품영양과학회 2021 한국식품영양과학회 학술대회발표집 Vol.2021 No.10
Nitrite, causing health risks such as "blue baby syndrome" in infants, could be produced by nitrate-respiring bacteria in various baby foods. In this study, to scientifically demonstrate the risk of nitrate-respiring bacteria in baby foods, the mesophilic isolates from 7 categories of baby foods (fruit and vegetable juice, weaning food, water, honey, cereal snacks, dairy products, and fruit chips) were quantitatively evaluated in terms of nitrate/nitrite respiration. Total 96 mesophiles were isolated as viable cells or spores and 38 strains showed rapid nitrite production within 6 h. The weaning food (13/38, 34.2%) and cereal snacks (10/38, 26.3%) had the highest proportion of these rapid nitrite producers among the food sources. Among them, 13 nitrite producers, which completely consumed nitrate and nitrite within 12 h, were only isolated from weaning food (n = 5), honey (n = 5), and cereal snacks (n = 3). Moreover, 2 out of 5 isolates from honey were isolated as spores, which has relatively high environmental resistance than viable cells. These results newly reveal the risk potential to the infant in the context of bacterial nitrite production during baby food consumption.
Role of MR Neurography for Evaluation of the Lumbosacral Plexus: A Scoping Review
Seon Gyeong Kim,정준용 대한영상의학회 2022 대한영상의학회지 Vol.83 No.6
Purpose MR neurography (MRN) is an imaging technique optimized to visualize the peripheral nerves. This review aimed to discover an optimized protocol for MRN of the lumbosacral plexus (LSP) and identify evidence for the clinical benefit of lumbosacral plexopathies. Materials and Methods We performed a systematic search of the two medical databases until September 2021. ‘Magnetic resonance imaging’, ‘lumbosacral plexus’, ‘neurologic disease’, or equivalent terms were used to search the literature. We extracted information on indications, MRN protocols for LSP, and clinical efficacy from 55 studies among those searched. Results MRN of the LSP is useful for displaying the distribution of peripheral nerve disease, guiding perineural injections, and assessing extraspinal causes of sciatica. Three-dimensional short-tau inversion recovery turbo spin-echo combined with vascular suppression is the mainstay of MRN. Conclusion Future work on the MRN of LSP should be directed to technical maturation and clinical validation of efficacy.
( Seon-Gyeong Ju ),( JeongKwan Roh ) 한국목재공학회 2019 목재공학 Vol.47 No.2
폐MDF로부터 해섬하여 얻은 재생섬유를 Reactive Red H-E3B (Bis-monochlorotriazine(MCT)/MCT type)와 Reactive Red RB 133%(bis-monochlorotriazine/Vinyl sulphone type)로 염색할 때 최적의 염색조건을 구명하기 위하여 염색조건(염료 농도, 염과 알칼리 첨가량, 염색온도)과 염색특성 및 일광견뢰도와의 관계를 검토하였다. 2종의 반응성염료 모두 염료농도가 1∼10(%,OWF)로 증가함에 따라 염착량(K/S)은 증가하였다. 또한, H-E3B가 RB 133%보다 염료 농도에 관계없이 K/S는 높았으며, 자외선 조사에 따른 색차는 낮아 자외선에 의한 변색 저항성이 양호하였다. 황산나트륨의 첨가량이 증가할수록 색차 및 K/S도 증가하였으며, 염의 첨가량은 50∼70 g/L가 적절하였다. 2 g/L의 탄산나트륨 첨가에 의해 색차 및 K/S가 크게 증가하였으나 그 이상의 첨가량 증가에서는 거의 차이가 없었다. 탄산나트륨의 첨가량은 pH 10을 유지하는 5∼10 g/L 가 적절할 것으로 생각된다. H-E3B 염료는 염색 온도가 높아짐에 따라 염착량이 증가하다가 80℃에서 다시 감소한 반면 RB 133%는 60∼70℃까지는 거의 동일한 염착량을 나타냈으나, 이후 감소하였다. 따라서 H-E3B는 80℃, RB 133%는 60℃가 적정한 것으로 판단된다. 이상의 최적조건에서 폐MDF 목질섬유를 염색처리하면 H-E3B염료는 1.5∼2.0R, RB 133%염료는 9.6∼10.0 PR의 색상을 가지는 염색 재생 목질섬유의 제조가 가능하였다. This study aims to review the relations between the dyeing conditions (i.e., dye concentration, addition amounts of salt and alkali, and dyeing temperature) and dyeing properties and color fastness to light for identifying the optimal dyeing conditions when dyed regenerated woody fibers were obtained through the defibration of waste medium density fiberboard (MDF) using reactive Red H-E3B (Bis-monochlorotriazine (MCT)/MCT type) and reactive Red RB133% (Bis-MCT/Vinyl sulphone type). The dyeing yield (K/S) obtained using two types of reactive dyes increased as the dye concentration increased by 1-10% (on the weight of fiber (OWF)). In addition, the K/S of H-E3B was higher than that of RB133% irrespective of the dye concentration. The color difference of H-E3B after ultraviolet (UV) radiation was lower than that of RB133%, denoting good resistance to discoloration by UV. As the amount of sodium sulfate increased, the color difference and K/S also increased, and the adequate salt content was determined to be 50-70 g/L. Further, the color difference and K/S significantly increased only the addition of 2 g/L of sodium carbonate; however, almost no difference was observed when more than 2 g/L of sodium carbonate was added. The addition amount of sodium carbonate was adequate 5-10 g/L to dyeing the fiber and the pH at this addition level was 10. The dyeing yield of H-E3B increased when the dyeing temperature increased; however, it subsequently decreased after the dyeing temperature became 80℃. The dyeing yield of RB133% was almost the same up to 60-70℃ but declined subsequently. Thus, the adequate temperatures were 80℃ and 60℃ for H-E3B and RB133%, respectively. If the waste MDF woody fiber was dyed under the aforementioned optimal conditions, dyed regenerated woody fiber can be obtained having the following colors: 1.5 to 2.0R with the H-E3B dye and 9.6 to 10.0 PR with RB133%.
( Hyeong Seon Lee ),( Gyeong Seon Lee ),( Seon Hee Kim ),( Hyun Kyung Kim ),( Dong Hee Suk ),( Dong Seok Lee ) 생화학분자생물학회 2014 BMB Reports Vol.47 No.2
Orostachys japonicus shows various biological activities. However, the molecular mechanisms remain unknown in LPS-stimulated macrophages. Here, we investigated the anti-oxidizing effect of the dichloromethane (DCM) and hexane fractions from O. japonicus (OJD and OJH) against oxidative stress in RAW 264.7 cells stimulated by LPS. OJD and OJH significantly increased the expression of heme oxygenase-1 (HO-1) in a dose- and time-dependent manner. Additionally, it was found that the expression of HO-1 was stimulated by Nrf2 activated via degradation of Keap1. ERK and p38 inhibitors repressed HO-1 induced by OJD and OJH in LPS-stimulated cells, respectively. In conclusion, these results suggest that OJD and OJH may block oxidative damage stimulated by LPS, via increasing the expression of HO-1 and Nrf2, and MAPK signaling pathway. [BMB Reports 2014; 47(2): 98-103]