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손지현,Md Atikul Islam,홍준호,정지영,송옥연,김희은,Naeem Khan,Nargis Jamila,김경수 한국식품과학회 2021 Food Science and Biotechnology Vol.30 No.3
This study was designed to analyze the volatileorganic compounds in the leaves of Ambrosia artemisiifoliaL. and Artemisia annua L. from Korea. For extractionof volatile compounds, headspace-solid phase microextraction (HS-SPME) and simultaneous distillationextraction (SDE) were applied and analyzed by gas chromatography/mass spectrometry (GC/MS). From the results,SDE extraction was found to give the highest concentrationof volatile compounds with an average concentration of1,237.79 mg/kg for A. annua L. leaves compared to1,122.73 mg/kg by HS-SPME technique. A total of 116volatile organic compounds were identified, including 76similar volatile organic compounds detected by both themethods of extraction in leaves of subject species atvarying concentrations. Among these 33 volatile organiccompounds were reported for the first time from the subjectplant species. Thus the present research findings extend thecharacterization of volatile organic compounds from leavesof A. annua L. and A. artemisiifolia L. species and reportedsome distinguishing compounds which may be used fortheir discrimination.
Ji Young Jeong,Md Atikul Islam,Kyong Su Kim 한국식품영양과학회 2021 한국식품영양과학회 학술대회발표집 Vol.2021 No.10
Silybum marianum (milk thistle) is an annual herb and it has been famous for therapeutic effects since ancient times. It is also effective in the treatment of cirrhosis, hepatitis, and fibrosis of the liver. On the other hand, Cirsium setidens (Dunn) Nakai, a perennial plant commonly called “Gondre” in Korea. It is extensively used in a variety of cooking methods, such as in preparing soups, vegetables, fried, stir-fried, and blanched food items. Both leaves have a similar appearance, but the therapeutic effects are different. So, identify their unique bioactive compound is essential to discriminant them. In this study, the 70% methanol extracts of these leaves were analyzed by high performance liquid chromatography diode array detector (HPLC-DAD). Two marker peaks identified only in Silybum marianum (milk thistle) leaves were assigned to be Luteolin-7-O-β-D-glucuronide (11.481 min, 347 nm) and Apigenin-7-glucuronide (12.653 min, 12.653 min, 335 nm) and one marker peak in Cirsium setidens (Dunn) Naki, which was Pectolinarin (14.969 min, 330 nm). The developed technique is rapid and efficient for authentication and discrimination of these leaves.
Ji Young Jeong,Md Atikul Islam,Kyong Su Kim 한국식품영양과학회 2021 한국식품영양과학회 학술대회발표집 Vol.2021 No.10
Animal welfare chicken meat demand is increasing worldwide. This study examines several elements, including macro (Ca, Mg, Na, K, P, and S), micro (Cu, Rb, Mn, Sr, and Zn), trace (Ba, Co, Ga, Li, Cr, Se, and V), and toxic (As, Pb, and Cd) in the chicken breast meat from conventional and animal welfare farms from South Korea. The macro elements analysis was executed on inductively coupled plasma-optical emission spectrometry (ICP-OES), whereas micro, trace, and toxic elements were examined via inductively coupled plasma-mass spectrometry (ICP-MS). The concentration of some elements for example, Zn, Ba, Se, Sr, Li, and Ga were higher in animal welfare compared to conventional chicken breast meat. The trace and toxic elements content were within safe limits. The principal component analysis (PCA) and linear discriminant analysis (LDA) were applied to the multi-element data for chicken breast meat authentication. The outcomes could be applied to evaluate chicken breast meat elemental composition of conventional and animal welfare chicken farms in South Korea as well as worldwide.
Influence of V2O5 Addition on the Magnetic Properties of Li-Zn Ferrites
M. Samir Ullah,Sm. Rubayatul Islam,M. Atikul Islam,M. Hassan,M. Firoz Uddin,M. Mizanur Rahman 한국자기학회 2023 Journal of Magnetics Vol.28 No.1
The structural property, bulk density and porosity of V2O5 (0.0, 0.4, 0.8 and 1.2 wt.%) added Li-Zn ferrites are observed along with the surface morphology. The samples have been prepared by the solid-state reaction technique and sintered at 1050 oC. The X-ray diffraction patterns of the prepared samples have shown the single phase cubic spinel structure. A microstructural study demonstrates that the grain size increases up to 0.8 wt.% V2O5 and slightly decreased thereafter for 1.2 wt.% V2O5 addition. The saturation magnetization value increases from 44.0 to 50.3 emu/g as the V2O5 content increases up to 0.8 wt.%. The decrease of magnetization for 1.2 wt.% V2O5 content is apparent and it is found to be 47.3 emu/g. This may be related to the dilution effect with the excess of non-magnetic V2O5. It is also observed that the value of initial permeability increases up to 0.8 wt.% V2O5.