• 제목/요약/키워드: plant nutrition

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고랭지 여름배추의 고온장해 원인 해석 (High Temperature Stress of Summer Chinese Cabbage in Alpine Region)

  • 황선웅;이주영;홍성창;박양호;윤승길;박문희
    • 한국토양비료학회지
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    • 제36권6호
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    • pp.417-422
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    • 2003
  • 고랭지 여름배추의 고온장해원인을 구명하기 위하여 표고별로 배추시료를 채취하여 Hsp, 엽온 분포 및 무기성분 함량을 조사하였다. Hsp는 표고가 낮고 과비를 한 배추 잎에서 더 많이 발현되었고 엽온도 표고 1,100 m에서 재배한 정상적인 배추보다 생리장해를 받은 배추에서 훨씬 더 높았다. 또한 배추 잎에서 즙액 중의 $NO_3-N$ 및 산분해한 CaO 함량만 낮았을 뿐 질소, 인산, 칼리, 고토 등과 같은 대부분의 무기성분 함량은 정상적인 배추보다 훨씬 높았다. 이상의 결과로 볼 때, 표고가 낮은 지대에서 발생하는 배추의 생리장해는 고온이 주원인이므로 해발고도에 따라 배추재배시기를 조절하여야 되며, 특히 과다한 비료를 표층시비하면 고온장해를 가중시킬 우려가 있으므로 반드시 토양검정에 의하여 적정량의 비료를 시용해야 고온장해를 경감시킬 수 있을 것으로 판단된다.

맨드라미 뿌리의 물 추출물질의 지방산과 아미노산의 조성 (Composition of Fatty Acid and Amino Acid in Water Extracted Material from Cockscomb Plant Root)

  • 남현근;노기환
    • 한국식품영양과학회지
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    • 제17권2호
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    • pp.172-175
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    • 1988
  • 맨드라미의 물추출 물질의 지방산과 아미노산의 조성을 조사한 결과 지방산은 모두 14종이 검출되었으며 특히 $C_{16:2}$가 되어 있었으며 필수지방산도 모두 포함되어 있었다. 미지의 물질을 확인한 결과 tricosanoic acid, lignoceric acid, cerotic acid, 1, 1'-[3-(2-cyclopentylethylidene)-1, 5-pentanediyl] biscyclopentane의 methyl ester 등을 함유하고 있었다. 아미노산은 모두 16종이 검출되었고 산성아미노산의

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식이섬유의 물리화학적 특성 (Physicochemical Properties of Dietary Fibers)

  • 황재관
    • 한국식품영양과학회지
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    • 제25권4호
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    • pp.715-719
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    • 1996
  • Dietary fibers consist mostly of complex carbohydrates such as cellulose, hemicelluloses and pectins, and also included are carbohydrate-based gums or hydrocolloids exampled as alginate, carrageenan, galactomannan xanthan, etc. Due to structural diversity, dietary fibers can be classified by various ways i.e., source, plant function, solubility, charge and topology. Understanding on the plant cell wall structure is of primary importance, since physicochemical properties of dietary fibers are dependent on the existence patterns in the cell wall. Depending on the four distinct observational dimensions, the physical parameters of dietary fibers were discussed in terms of raw sources, bulky & complex plant cell wall materials, individually separated hydrocolloid materials and specifically designed materials. Each existence state possesses the distinct physical parameters governing a variety of physiological properties of dietary fibers.

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Determination of pectolinarin in Cirsium spp. using HPLC/UV analysis

  • Cho, Sunghun;Lee, Jaemin;Lee, Yoon Kyoung;Chung, Mi Ja;Kwon, Ki Han;Lee, Sanghyun
    • Journal of Applied Biological Chemistry
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    • 제59권2호
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    • pp.107-112
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    • 2016
  • Pectolinarin was isolated from the ethyl acetate fraction of Cirsium setidens using open column chromatography and was analyzed using spectrometry. Pectolinarin content in Cirsium spp. was determined using HPLC/UV. Pectolinarin content in the aerial part of Cirsium spp. was higher than that in the root and pappus. Pectolinarin content was highest in the aerial part of C. chlorolepis (110.65mg/g extract). Consequently, the aerial part of C. chlorolepis has potential for use in new natural medicinal products, health supplements, and beverages.

털조장나무잎의 소염활성 및 Kaempferol 배당체의 분리 (Isolation of Kaempferol Glycoside from Lindera sericea and Anti-inflammatory Effect)

  • 박종철;박주권;김종홍;김성환;김남재
    • 한국식품영양과학회지
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    • 제25권3호
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    • pp.519-522
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    • 1996
  • From the leaves of Lindera sericea Bl., kaempferol-3,7-0-di-a-L-rhamnopyranoside was isolated and characterized by spectral data and acid hydrolysis. This compound is reported for the first time from this plant. The content of kaempferol glycoside was high in May and June, and low in the fall. And the methoanolic extract of title plant showed the inhibitory effect on carrageenin-induced edema.

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Magnesium intake and dietary sources among Koreans: findings from the Korea National Health and Nutrition Examination Survey 2016-2019

  • Jee-Seon Shim;Ki Nam Kim;Jung-Sug Lee;Mi Ock Yoon;Hyun Sook Lee
    • Nutrition Research and Practice
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    • 제17권1호
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    • pp.48-61
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    • 2023
  • BACKGROUND/OBJECTIVES: Magnesium is an essential nutrient for human health. However, inadequate intake is commonly reported worldwide. Along with reduced consumption of vegetables and fruits and increased consumption of refined or processed foods, inadequate magnesium intake is increasingly reported as a serious problem. This study aimed to assess magnesium intake, its dietary sources, and the adequacy of magnesium intake in Korean populations. SUBJECTS/METHODS: Data was obtained from the Korea National Health and Nutrition Examination Survey 2016-2019 and included individuals aged ≥1 yr who had participated in a nutrition survey (n=28,418). Dietary intake was assessed by 24-h recall, and dietary magnesium intake was estimated using a newly established magnesium database. Diet adequacy was evaluated by comparing dietary intake with the estimated average requirement (EAR) suggested in the Korean Dietary Reference Intakes 2020. RESULTS: The mean dietary magnesium intake of Koreans aged ≥1 yr was 300.4 mg/d, which was equivalent to 119.8% of the EAR. The prevalence of individuals whose magnesium intake met the EAR was 56.8%. Inadequate intake was observed more in females, adolescents and young adults aged 12-29 yrs, elders aged ≥65 yrs, and individuals with low income. About four-fifths of the daily magnesium came from plant-based foods, and the major food groups contributing to magnesium intake were grains (28.3%), vegetables (17.6%), and meats (8.4%). The top 5 individual foods that contributed to magnesium intake were rice, Baechu (Korean cabbage) kimchi, tofu, pork, and milk. However, the contribution of plant foods and individual contributing food items differed slightly by sex and age groups. CONCLUSIONS: This study found that the mean dietary magnesium intake among Koreans was above the recommended intake, whereas nearly one in 2 Koreans had inadequate magnesium intake. To better understand the status of magnesium intake, further research is required, which includes the intake of dietary supplements.