• 제목/요약/키워드: Harmful ingredients

검색결과 55건 처리시간 0.031초

치과용 레진 연마를 위한 바렐 연마재의 성분 분석 및 표면 잔류물 관찰 (Component and surface residue observation of barrel finishing media for grinding dental resins)

  • 정안나;박유진;최성민
    • 대한치과기공학회지
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    • 제43권4호
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    • pp.145-152
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    • 2021
  • Purpose: This study aimed to produce resin prosthetics using a dental barrel finishing machine. For dental resin grinding, the ingredients of the barrel finishing media were analyzed, and surface residues of the resin were observed. Methods: Two types of barrel finishing media for dental resin grinding were tested. Specimens were made from thermal polymerized, auto polymerized, and photopolymerized resins. Finishing media were analyzed through energy-dispersive X-ray spectroscopy (EDS) component analysis and inductively coupled plasma-optical emission spectrometry (ICP-OES) component analysis. Then, the prepared specimen was barrel finished for 25 minutes using two types of barrel finishing media, and scanning electron microscope was photographed to observe the surface residues. Results: As a result of EDS component analysis, both types of finishing media were analyzed for the components of C, O, Zr and Al elements, and industry media (IM) was further analyzed for the components of Si and Mg elements. In the ICP-OES component analysis, Cd and As, which are harmful elements, were detected in IM, and no harmful elements were detected in manufacturing media (MM). Because of observation of surface residues, no residues were observed in the three types of resin specimens that were barrel finished with two types of finishing media. Conclusion: Surface residue wasn't observed on the specimens polished using two types of finishing media. However, in IM, Cd and As, which are harmful elements, were detected, making it inappropriate for clinical use. In MM, harmful elements were not detected; therefore, clinical use will be possible.

The Trend of Cigarette Design and Tobacco Flavor System Development

  • Wu, Jimmy Z.
    • 한국연초학회지
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    • 제24권1호
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    • pp.67-73
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    • 2002
  • In light of addressing consumer health concern, coping with anti-tobacco movement, and promoting new product, tobacco industry is actively pursuing to make a new generation of cigarettes with low tar and nicotine deliveries, and less harmful substances. Low tar and low nicotine cigarettes increases their market shares dramatically world wide, especially in KT&G, multinational tobacco companies, EU countries, even in China regulated by CNTC to set up yearly target to lower tar and nicotine deliveries. On the other hand, to design a new cigarette with reduced harmful substances begins to gain speed. The "modified Hoffmann list" publishes thirty plus substances in tobacco leaf and main smoke stream, which is the prime suspect causing health problems. Various ways and means are developed to reduce such components including new tobacco breeds, new curing method, tobacco leaf treatment before processing, selected filtration system, innovated casing system to reduce free radicals, as well as some non conventional cigarette products. In TSRC held this year, the main topic is related to reduce tobacco specific nitrosamines in tobacco leaf. The new generation of cigarette is in the horizon. It still needs a lot help to produce commercial products with satisfied taste and aroma characters. The flavor industry is not regulated by many governments demanding which ingredients might or might not be for tobacco use. However, most of the cigarette companies self impose a list of ingredients to guide flavor suppliers to design flavors. Unfortunately, the number of ingredients in those lists is getting shorter every year. It is understandable that the health is not the only reason. Some cigarette companies are playing safe to protect the company from potential lawsuit, while others are just copying from their competitors. Moreover, it is obvious that it needs more assistance from casings and flavors to design new generation of cigarettes with missing certain flavor components in tobacco leaf and main smoke stream. These flavor components are either non-existed or at lower level at new form of cured tobacco leaf or filtered in the main smoke stream along with reduced harmful substances. The use of carbon filters and other selected filtration system poses another tough task for flavor system design. Specific flavor components are missing from the smoke analysis data, which brings a notion of "carbon taste" and "dryness" of mouth feel. It is ever more demanded by cigarette industry to flavor suppliers to produce flavors as body enhancer, tobacco notes, salivating agents, harshness reducer, and various of aromatic notes provided they are safe to use. Another trend is that water based flavor or flavor with reduced ethanol as solvent is gaining popularity. It is preferred by some cigarette companies that the flavor is compounded with all natural ingredients or all ingredients should he GMO free. The new generation of cigarettes demands many ways of new thinking process. It is also vital for tobacco industry. It reflects the real needs for the consumers that the cigarette product should be safe to use as well as bearing the taste and aroma characters smokers always enjoyed. An effective tobacco flavor system is definitely a part of the equation. The global trend of tobacco industry is like trends of any other industries lead by consumer needs, benefited with new technology availability, affected by the global economy, and subjected for various rules and regulations. Anti-tobacco organizations and media exceptionally scrutinize cigarette, as a legal commercial product. Cigarette is probably the most studied commercial product for its composition, structure, deliveries, effects, as well as its new developmental trend. Therefore, any new trend of cigarette development would be within these boundaries. This paper is trying to point out what it would be like for tobacco industry in the next few yews and what concerns the tobacco industry. It focuses mostly on the efforts to produce safer cigarettes. It is such a vital task for the tobacco industry and its affiliate industries such as cigarette papers, filters, flavors, and other materials. The facts and knowledge presented in this paper might be well known for the public. Some of the comments and predictions are very much personal opinion for a further discussion.

소 초유의 유효성분과 산업적 활용 (Effective Components of Bovine Colostrum and Its Applications)

  • 서상아;서혜령;허영태
    • 한국수정란이식학회지
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    • 제33권3호
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    • pp.159-168
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    • 2018
  • Bovine colostrum is necessary for newborn calves to survive, grow and receive immunity from their mother. Cows in Korea produce about 35kg of colostrum, 4Kg of which is fed to the calf, and the rest is discarded. The bovine colostrum causes the harmful side effects to human, such as allergies and digestive problems; so, it is prohibited by law to consume colostrum itself as a food. However, many scientific research data have suggested that components in the colostrum can improve human health and has the ability to help treat diseases. In line with the trend of food and pharmacy industries using natural product materials, which attract positive attention, recently, some ingredients in colostrum have been used in the production of food supplements, and it has been used in its raw form in some cosmetics. This review introduces the active ingredients and physiologically active substances contained in bovine colostrum, summarizes the efficacy of physiological enhancement of the colostrum, which has been proven by scientific methods to date, and also suggests the possibility of industrial applications of colostrum as an animal-derived natural material.

진구성분의 소진드기 구제(驅除)(살충(殺蟲) 및 기피(忌避))효과(效力)에 관한 연구(硏究) (Studies on the Cattle Tick killing and Repellent Effects of the Ingredients of Radix Jingyu)

  • 이장락
    • 대한수의학회지
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    • 제2권2호
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    • pp.15-24
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    • 1962
  • In the previous report it was demonstrated that aqueous extracts of two Korean indigenous crude drugs, Radix Jingyu and Fructus ponciri, have an excellent tick repellent effect, and also the need for further analytical study of these crude drugs was suggested. In the experiments to be reported herein, attempts were made to find out the active ingredients from Radix Jingyu, since the aqueons extract of Radix Jingyu proved to be mone effective than that of Fructus ponciri. It will be shown that the active ingredient is indicative of Lycaconitine, a known alkaloid. An aqueons solution containing 1.5 Gms of Lycaconitine in tartrate when sprayed on a cow exerted tick repellent effect against Boophilus microplus which lasted approximately 25 days without any harmful influences on cattle. It will also be shown that the oil-fat components of Radix Jingyu act synergistically with Lycaconitine in accelerating and lengthening the effect, although the components alone have no effect under the conditions tested. It was of interest to note that the oil-fat components of Radix Jingyu showed definite repellent effect against the larvae of Boophilus microplus in laboratory experiments by the method newly devised. On the basis of these observations, it was concluded that Lycaconitine can be used as cattle tick repellent, and the evidence seems to warrant a large scale production of Lycaconitine for its widespread use. Further studies on the possible effect of the alkaloid on other genera or species of ticks and related vermins were also indicated.

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국내 허가된 해열.진통.소염제의 치료중복 주의 가이드라인 개발 (Development of Drug Utilization Review Guidelines for Therapeutic Duplication of Antipyretics, Analgesics, and Anti-inflammatory Drugs Registered in Korea)

  • 이영숙;김남효;손현순;최경업;신현택
    • 한국임상약학회지
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    • 제20권3호
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    • pp.213-220
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    • 2010
  • Therapeutic duplication (TD) is a serious problem that frequently occurring primarily in the ambulatory setting in Korea. Implementation of concurrent drug utilization review (DUR) is a promising way to reduce inappropriate prescription and dispensing, and improve patient safety. This study was aimed to develop the process of DUR module of TD. Sixty-five drug ingredients classified into the drug category of the antipyretic, analgesic, and anti-inflammatory drug approved in Korea (The KFDA-dess nated classification codes of 114 or 264) were reviewed for this purpose. The drug ingredients (and products) were reclassified based on WHO's Anatomical, Therapeutic and Chemical (ATC) classification system. The clinical practice guidelines, textbooks and product labels on therapeutic uses of these drugs in Korea and several fores n countries were reviewed. If the drugs were categorized into the same therapeutically duplicable class, they were defined not to be used concurrently because the concurrent use was "therapeutically duplicated (unnecessary or even harmful)". Among the studied drug products, the following 5 drug classes were considto beas "therapeutic duplication": (1), on-t tooid DURnti-inflammatory drugs (NSAIDs, including s Dicylates), (2),Anilidts, (3),Opioids, (4) Ergot Dk Doids and (5) 5-$HT_1$ receptor agonot s. Therefore, concurrent prescribing or dispensing of more than 2 drug ingredients any in the above same classes should be considered as TD and needed to be warrant for careful review by pharmacists before dispensing.

돼지사료내 곰팡이독소의 오염 및 영양학적 해결방안 (Mycotoxin contaminations in swine diets and potential nutritional solutions)

  • 손아름
    • 한국응용과학기술학회지
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    • 제35권4호
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    • pp.1230-1242
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    • 2018
  • 곰팡이독소는 곰팡이의 2차 대사산물로 동물용 원료사료 중에서 특히 곡물 및 곡물부산물에서 가장 흔하게 발생한다. 돼지는 곰팡이독소에 대한 감수성이 다른 동물에 비해 높은 것으로 알려져 있다. 아플라톡신, 디옥시니발레놀 및 제랄레논은 동물용 원료사료에서 가장 흔하게 발생하는 곰팡이독소이며, 국내 외에서 허용기준을 설정하여 관리하고 있다. 곰팡이독소는 종류에 따라 서로 다른 독성작용을 가지지만 모두 면역체계를 표적으로 하며, 최종적으로 돼지의 성장저하를 초래한다. 따라서 곰팡이독소에 의한 피해를 최소화하기 위한 다양한 대책이 필요하다. 일반적으로 곰팡이독소에 오염된 사료를 섭취한 돼지는 사료섭취량이 감소하며, 그 결과 증체량 저하가 발생한다. 사료섭취량 감소로 인한 필수영양소의 불충분한 공급은 영양소함량을 강화시킨 사료를 급여함으로써 증체량 감소를 최소화할 수 있다. 또한 곰팡이독소 저감제를 이용하여 곰팡이독소에 의한 피해를 저감시킬 수 있으나, 곰팡이독소의 종류 및 농도, 환경적 요인, 저감제의 종류 등에 따라 저감제 사용 효과에 대한 변이가 존재한다.

Recent strategies for improving the quality of meat products

  • Seonmin Lee;Kyung Jo;Seul-Ki-Chan Jeong;Hayeon Jeon;Yun-Sang Choi;Samooel Jung
    • Journal of Animal Science and Technology
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    • 제65권5호
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    • pp.895-911
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    • 2023
  • Processed meat products play a vital role in our daily dietary intake due to their rich protein content and the inherent convenience they offer. However, they often contain synthetic additives and ingredients that may pose health risks when taken excessively. This review explores strategies to improve meat product quality, focusing on three key approaches: substituting synthetic additives, reducing the ingredients potentially harmful when overconsumed like salt and animal fat, and boosting nutritional value. To replace synthetic additives, natural sources like celery and beet powders, as well as atmospheric cold plasma treatment, have been considered. However, for phosphates, the use of organic alternatives is limited due to the low phosphate content in natural substances. Thus, dietary fiber has been used to replicate phosphate functions by enhancing water retention and emulsion stability in meat products. Reducing the excessive salt and animal fat has garnered attention. Plant polysaccharides interact with water, fat, and proteins, improving gel formation and water retention, and enabling the development of low-salt and low-fat products. Replacing saturated fats with vegetable oils is also an option, but it requires techniques like Pickering emulsion or encapsulation to maintain product quality. These strategies aim to reduce or replace synthetic additives and ingredients that can potentially harm health. Dietary fiber offers numerous health benefits, including gut health improvement, calorie reduction, and blood glucose and lipid level regulation. Natural plant extracts not only enhance oxidative stability but also reduce potential carcinogens as antioxidants. Controlling protein and lipid bioavailability is also considered, especially for specific consumer groups like infants, the elderly, and individuals engaged in physical training with dietary management. Future research should explore the full potential of dietary fiber, encompassing synthetic additive substitution, salt and animal fat reduction, and nutritional enhancement. Additionally, optimal sources and dosages of polysaccharides should be determined, considering their distinct properties in interactions with water, proteins, and fats. This holistic approach holds promise for improving meat product quality with minimal processing.

폐쇄순환 양식장에서의 생물여과기 (biofilter) 및 자외선살균기(ultra-violet disinfector)효과에 대한 연구 (The study for the effect of biofilter and ultra-violet disinfector in fish-breeding place using seawater)

  • 강청근;노기완;류시영;조충희
    • 한국동물위생학회지
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    • 제22권4호
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    • pp.357-361
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    • 1999
  • The most harmful nitrogenous compounds in fish-breeding place using are ammonia and nitrate. Excessively high total nitrogen concentration is the signal of unbalance for breeding fishes in seawater and may result overfeeding or overstocking without seawater treatment system. The failure of elimination for the organic ingredients or nitrogen compounds can also cause the consequence of inadequate oxygen concentration in seawater, either. The study shows the effect of biofilter and W disinfector of seawater in the fish- breeding place. In the results, these tools had ammonia, nitrite, nitrate and decreased 71.8%, 27.6% and 1%, respectively, and the total number of microorganisms decreased up to 81.9%.

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사료 중의 곰팡이와 곰팡이 독소에 대한 문제점과 가능한 대책 (Problems and Possible Solutions about Feed Fungi and Mycotoxins)

  • 남기홍
    • 한국가금학회지
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    • 제21권2호
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    • pp.113-117
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    • 1994
  • Of the 200, 000 known species of molds, only 50 or 60 are known to be harmful to humans or livestock. Certain fungi that grow on grains and grasses can produce chemical substances called mycotoxins that adversely affect performance in poultry. There are several methods of preserving feed ingredients. The list includes: drying, antioxidants, mold inhibitors, organic acids, phosphates, cooking or toasting, fat extraction, blending and fermenting. Mold inhibitors are manufactured to inhibit mold growth and prevent the production of toxic substances. They are fungistats and not fungicides, that is, they only stop the growth of molds. Practical and cost-effective methods to detoxify mycotoxin containing feedstuffs are in great demand. 0.5% hydrated sodium calcium aluminosilicate added to the diet protected chicks from the deleterious effects of aflatoxin-contaminated feed. The dietary addition of antioxidants and methionine also significantly diminished the negative effects on body weight in chicks toxicated with 3.0 ppm aflatoxin B1.

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