• Applied Biological Chemistry
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• 제47권3호
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• pp.325-331
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• 2004

왕겨 분말을 가연성 담체로 첨가하여 분상, 과립상 및 봉상의 fenarimol 훈연제를 제제하고 제형이 훈연제의 연소성에 미치는 영향을 조사하였다. 가연성 담체로 목분을 사용한 목분 훈연제의 연소성을 조사하고 왕겨 훈연제와 비교하였다. 왕겨 분말을 가연성 담체로 한 fenarimol 훈연제(3%)는 분말, 과립 및 막대 모양으로 성형할 수 있었으며, 염소산나트륨 첨가비가 11% 이상일 때 모두 연속적으로 연소하였다. 형상과 무관하게 모두 염소산나트륨 첨가비가 13%인 훈연제의 훈연율이 가장 높았으며, 분상 훈연제(64.5%) < 과립훈연제(78.4%) < 봉상 훈연제(90.9%) 순으로 훈연율이 증가하였다. 봉상 훈연제는 과립훈연제보다 점화가 특히 용이하고 강도와 훈연율이 우수하였다. 목분을 가연성 담체로 사용한 훈연제는 방염 성분을 함유하여 연소 시간이 매우 길어지는 특성이 있어서 훈연제보다 서서히 연소하는 훈증제용 담체로 더 적합하였다.

• 한국가금학회지
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• 제22권3호
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• pp.155-160
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• 1995

To evaluate the nutritive values of outdoor mass cultivated Spirulina platensis both chemical analysis and bioassay were carried out using adult cockerels. Blue-green algae, Spirulina platensis contained about 71g /l00g DM of crude protein with balanced amino acid profiles although methionine is liable to he limiting to animals. Compared to fish meal, calcium content and calcium : phosphorus ratio of the Spirulina were not suitable in terms of animal requirements. Reasonable amount of y-linolenic acid(C18: 3 $\omega$6) in Spirulina platensis draws a clinical attention due to its historically recognized pharmacotheraputic functions. Metabolizable energy contents of Spirulina were 3.67 and 3.11 mcal /kg DM for TMEn and AMFn, respectively, which therefore, can he a reliable energy source for poultry. True amino acid availabilities of essential amino acids of Spirulina platensis were higher than 90% for poultry, which is better than comparative ingredient like fish meal. Overall data from both chemical analysis and bioassay demonstrated that the Spirulina platensis could he a favorable protein feedstuffs for poultry.

• Asian Pacific Journal of Cancer Prevention
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• 제15권10호
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• pp.4301-4305
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• 2014

Tanshinone IIA is a pharmacologically active ingredient extracted from Danshen, a Chinese traditional medicine. Its molecular mechanisms are still unclear. The present study utilized computational approaches to uncover the potential targets of this compound. In this research, PharmMapper server was used as the inverse docking tool andnd the results were verified by Autodock vina in PyRx 0.8, and by DRAR-CPI, a server for drug repositioning via the chemical-protein interactome. Results showed that the retinoic acid receptor alpha ($RAR{\alpha}$), a target protein in acute promyelocytic leukemia (APL), was in the top rank, with a pharmacophore model matching well the molecular features of Tanshinone IIA. Moreover, molecular docking and drug repurposing results showed that the complex was also matched in terms of structure and chemical-protein interactions. These results indicated that $RAR{\alpha}$ may be a potential target of Tanshinone IIA for APL. The study can provide useful information for further biological and biochemical research on natural compounds.

• Bulletin of the Korean Chemical Society
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• 제32권1호
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• pp.109-112
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• 2011

A new derivative of tacrolimus was evaluated for its molecular weight, using LC-MS of the tacrolimus bulk active pharmaceutical ingredient (API) recovered through the purification of crude tacrolimus produced by Streptomyces clavuligerus CKD-1119. In addition, the molecular weight of the new derivative of tacrolimus was found to be at m/z 818 and was identified by $^{13}C$-NMR with peak assignments based on the differences in methyl group location resulting from the chemical structure. The structure of the new derivative, an unknown impurity of tacrolimus, was found to be 18-methyltacrolimus through comparison of the spectral data of the structural differences between ascomycin, tacrolimus, and the new derivative 18-methyltacrolimus.

• Applied Biological Chemistry
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• 제35권2호
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• pp.76-81
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• 1992

원제와 무기증량제의 혼합분말을 유용성 점결제 stearly alcohol 혹은 ethyl cellulose로 조립한 KC-7079, isoprothiolane, perfluidone 및 tricyazole 입제를 $25^{\circ}C$ 항온조건하에서 물이 담긴 비이커에 침적하고 일정시간 간격으로 수중 유효성분농도를 분석하여 입제의 용출속도를 측정하였다. 입제의 수중용출속도는 점결제 첨가량에 따른 입제의 수중붕괴성, 사용한 점결제의 종류 및 원제의 물에 대한 용해도에 따라 크게 영향을 받았다. Stearyl alcohol 첨가입제의 수중붕괴성은 제제방법에 따라 달라져서 수중에서 붕괴되지 않고 원형을 유지하기 위한 점결제 첨가량은 sodium dodecylbenzene sulfonate 수용액(0.5%)으로 반죽하여 조립할 때는 8%, methanol로 반죽하여 조립할 때는 3% 이상 요구되었다. Stearyl alcohol을 점결제로 사용한 KC-7079 입제는 점결제 첨가량이 증가할수록 수중붕괴성이 감소하여 유효성분의 초기 용출속도가 크게 감소하였으며, 붕괴하지 않는 입제는 점결제 첨가비가 증가하여도 용출속도가 거의 변하지 않았다. Ethyl cellulose가 0.5% 이상 첨가된 입제는 수중에서 붕괴하지 않았으며, 점결제 첨가비가 증가할수록 유효성분의 용출지연효과가 증가하였다. 또한 용출지연효과는 원제함량이 작은 입제에서 현저하였다. Stearyl alcohol 첨가제제는 KC-7079와 perfluidone의 용출을 지연시킨 반면 ethyl cellulose 첨가제제는 모든 원제에 대하여 용출을 지연시킬 수 있었다. 또한 이들 유용성 점결제로 조립한 입제는 원제의 수용해도가 작을수록 용출지연효과가 뚜렷하였다.

• Journal of Ginseng Research
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• 제31권2호
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• pp.69-73
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• 2007

Since chemical structures of ginsenoside as active ingredient of Panax ginseng are known, accumulating evidence have shown that ginsenoside is one of bio-active ligands through the diverse physiological and pharmacological evaluations. Chemical structures of ginsenoside could be divided into three parts depending on diol or triol ginsenoside: Steroid- or cholesterol-like backbone structure, carbohydrate portions, which are attached at the carbon-3, -6 or -20, and aliphatic side chain coupled to the backbone structure at the carbon-20. Ginsenosides also exist as stereoisomer at the carbon-20. Bioactive ligands usually exhibit the their structure-function relationships. In ginsenosides, there is little known about the relationship of chemical structure and biological activity. Recent reports have shown that ginsenoside $Rg_3$, one of active ginsenosides, exhibits its differential physiological or pharmacological actions depending on its chemical structure. This review will show how ginsenoside $Rg_3$, as a model compound, is functionally coupled to voltage-gated ion channel or ligand-gated ion channel regulations in related with its chemical structure.

• 한국잡초학회지
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• 제17권2호
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• pp.135-138
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• 1997

Sulfonylureas are highly active herbicides which can be applied at very low rate(10-50g/ha) to control broadleaf weeds. The nature of this category of compound is, however, very unstable toward hydrolysis. Therefore, the preparation of these compounds as liquid formulation was not possible. Most of the current formulations of sulfonylurea are in dry forms such as water dispersible granule or wettable powder. Even in these dry forms, the active ingredients also encounter significant chemical decomposition. This study involves the preparation of the sulfonylurea salts by reacting the parent compound with base such as sodium hydroxide. The salt becomes stable toward hydrolysis and it turns soluble when diluted with water. This discovery makes the preparation for liquid formulation or soluble granule of sulfonylurea possible. The stoichiometry of base added to the neutral sulfonylurea is controlled quite precisely. The base has to be added enough to quench the acidic impurities in the technical material and to convert the active ingredient into salt. However, the base should not be overused to cause further saponification of the sulfonylurea salts. The chemical nature of these compounds is presented and the chemical reaction is described. New soluble liquid formulation and solid granule formulation of sulfonylurea are suggested.

• Journal of Microbiology and Biotechnology
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• 제17권9호
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• pp.1533-1537
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• 2007

In this study, in order to develop a continuous production process of lactosucrose in a packed-bed reactor, Sterigmatomyces elviae ATCC 18894 was selected and mutated. The mutant strain of S. elviae showed 54.3% higher lactosucrose production than the wild type. Reaction conditions such as temperature, pH, substrate concentration and flow rate were also optimized. Under optimized reaction conditions ($50^{\circ}C$, pH 6.0, 25% sucrose and 25% lactose as substrate, flow rate 1.2 ml/min), the maximum concentration of lactosucrose (192 g/l) was obtained. In a packed-bed reactor, continuous production of lactosucrose was performed using S. elviae mutant immobilized in calcium alginate, and about 180 g/l of lactosucrose production was achieved for 48 days.

• 대한한의학회지
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• 제18권1호
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• pp.187-197
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• 1997

Major separation for the active ingredients and characterization of chemical properties in conjunction with screening test on animal were performed in order to analyze and standardize Ligustici Rhizoma or Angelicae Tenuissimae Radix as an important oriental herbal medicine for antiphlogistic or an important oriental herbal medicine for antiphlogistic or an anodyne. Furthermore the structure, composition and contents of ingredients for essential oil in Angelicae Tenuissimae Radix(Suckpo, Korea) were determined by means of Ge/MS followed by screening test on Z-ligustilide(82%) known as major ingredient as well as butylidenephthalide collected by HPLC with normal phase semiprep-column. The total active ingredient in Ligustici Rhizoma from China or Angelicae Tenuissimae harvested at Choonyang(Kyungnam, Korea), Jungsun(Kangwon, Korea), Suckpo(Kyungnam Korea), Youngchun(Kyungnam, Korea) have been determined showing higher abundant for three times on the product in Korea compared to that in China. In addition, the major component in Ahgelicae Tebyussunae Radux extract was found to be Z-ligustilide(70-80%) which is very different from that in Ligustici Rhizoma senkyunolide(39%) as major species. For screening test of Ligustici Rhizoma or Angelicae Tenuissimae Radix extracts toward the target animal, the efficiency has been shown the similarity on both extracts. Taking into account the level of ingredient, the total efficiency may be three times higher on Angelicae Tenuissimae Radix in Korea compared to Ligustici Rhizoma in China. As a result of present study, it is preferable to distinguish between Ligustici Rhizoma and Angelicae Tenuissimae Radix for better usage of oriental herbal medicine because of very different composition and abundant in spite of their similar screening effect.

• 산업진흥연구
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• 제9권1호
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• pp.13-20
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• 2024

본 연구에서는 국내 시장에서 판매되는 다크닝 샴푸 5종에 대한 성분 분석을 실시하고, 그 결과를 바탕으로 해당 제품들의 유효 성분과 안전성에 대해 평가하였다. GC-MS 분석을 통해 각 샴푸의 주요 성분을 확인한 결과, 제조사가 표기한 전성분 목록과 일부 차이가 있는 화합물들이 검출되었다. 이는 GC-MS 분석의 한계와 특정 화합물의 휘발성 여부에 따른 것으로 해석된다. 이러한 분석을 바탕으로, 모발의 색상 변화에 기여할 가능성이 있는 화합물을 조사하였다. 그러나 이러한 화합물들이 모발 다크닝 과정 자체에 직접적으로 관련된 역할을 하는 성분이라고 단정지을 수는 없었다. 다만 헤어 케어 제품의 성능을 향상시키고 모발에 대한 일부 추가적인 이점을 제공하거나 제품의 질감, 안정성 또는 보존 등의 특성을 향상시키는 역할을 하는 것으로 추정할 수 있었다. 또한 GC-MS 성분 분석 결과, 확인된 성분 중 안전성이 우려되는 화합물에 대한 조사를 통해 화장품 원료로 사용될 경우 주의가 필요한 몇 가지 화합물에 대한 정보를 제시하였다.