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축산관측

  • 한국오리협회
    • Monthly Duck's Village
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    • s.231
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    • pp.24-27
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    • 2022
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Overproduction of Bacterial Trypsin in Streptomyces - Optimization for Streptomyces griseus Trypsin Production by Recombinant Streptomyces (미생물을 이용한 트립신 과대 생산 연구 - Streptomyces용 숙주-벡터계를 이용한 트립신 유전자의 대량발현 최적화 -)

  • Kim, Jong-Hee;Hong, Soon-Kwang
    • Microbiology and Biotechnology Letters
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    • v.36 no.1
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    • pp.28-33
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    • 2008
  • The expression vector (pWHM3-TR1R2) for sprT gene encoding Streptomyces griseus trypsin (SGT) followed by two regulatory genes, sgtR1 and sgtR2, was introduced into Streptomyces lividans TK24 and Streptomyces griseus IFO 13350. Various media with different compositions were used to maximize the productivity of SGT in the recombinant trains. he SGT productivity was best when the transformant of S. lividans TK24 was cultivated in R2YE medium (0.74 unit/mL) at 5 days of cultivation. C5/L (0.66 unit/mL) medium also gave a good productivity, but Livid (0.08 unit/mL) and NDSK (0.06 unit/mL) yielded poor productivities. S. griseus IFO 13350/pWHM3-TR1R2 produced SGT by 1.518 unit/mL (C5/L), 1.284unit/mL (R2YE),0.932 unit/mL (NDSK), and 0.295 unit/mL (Livid) at 7 days of cultivation, which was much higher than those from S. lividans TK24/TR1R2. The SGT protein was purified from the culture broth of S. griseus IFO 13350/pWHM3-TR1R2 in C5/L to homogeneity via ammonium sulfate fractionation, and CM-sepharose and SP-sepharose column chromatographies. The specific activity of purified SGT was 69,252 unit/mg, and the final purification fold and recovery yield were 6.5 and 1.4%, respectively.

A study on effective disinfection methods of medical ultrasound probe resident floras (의료용 초음파 프로브 상제균의 효과적인 소독법에 관한 연구)

  • Yoon, Joon;Kim, Hyeon-ju
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.19 no.1
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    • pp.346-354
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    • 2018
  • In the probe of a medical ultrasound device, three parts were selected randomly by the examiner and the bacteria in the probe were detected by the blood examiners. In addition, the degree of death of the pathogenic bacteria after each disinfection of the detected pathogens, disinfecting ethanol, and disinfecting tissue of the detected pathogens were analyzed quantitatively. The following was detected: S Aureus (32.3 %), Bacillus spp. (26.5 %), Micrococcus spp. (21.5 %), and CNS (20 %). With the conventional probe, S. aureus (26.2 %), a playback curve (24.2 %), and a micron (19.5 %), Micrococcus spp. (15.5 %), and CNS (14.6 %) were observed. In the fan probe, S. aureus (24.7 %), Enterococcus (24.7 %), Enterococcus (17.7 %), and CNS (13.8 %) were detected. The disinfection of the three pathogens detected revealed sterilization of most of the pathogens, and most cases contained at least 91.3 % of the total sterilizing effect (P>0.05). In addition, for the disinfection of Propolis extract and disinfecting tissue, the disinfection effect was lower than that of disinfecting ethanol, but the difference was not statistically significant (P>0.05). The results revealed bacteria on most of the ultrasound probes. Antiseptic disinfection of surgical instruments using an extract of propolis works with results similar to those of ethanol. A blood test along with disinfection can help prevent infection if an ultrasound probe is applied to food.

FEEDLOT FATTENING OF SHEEP IN PAKISTAN

  • Jadoon, J.K.;Syed, A.H.;Mirza, I.H.;Naqvi, M.A.
    • Asian-Australasian Journal of Animal Sciences
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    • v.3 no.3
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    • pp.161-164
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    • 1990
  • Ninety six Rambouillet ${\times}$ Kaghani intact male lambs of 18 months of age were divided into 6 groups of 16 lambs each, groups being G-1, G-2, G-3, G-4, G-5 and G-6. Average liveweight of animals on different treatments at day 0 of the experiment was G-1 (24.68 S.D 3.35), G-2 (24.56 S.D 2.55), G-3 (24.53 S.D 2.90), G-4 (24.51 S.D 3.38), G-5 (24.58 S.D 3.58) and G-6 (24.81 S.D 3.43). Animals on treatment G-1 were fed only maize silage ad libitum, G-2 had been offered maize silage ad libitum plus 4.8 kg of commercial concentrate (Sona Vanda) per group, G-3 maize silage ad libitum plus 4.8 kg of crushed maize grain per group. G-4 lambs were fed oat silage ad libitum plus 4.8 kg of crushed maize per group, G-5 oat silage plus 4.8 kg of commercial concentrate per group and G-6 only oat silage ad libitum. The results showed highly significant differences (p<0.01) among treatment groups in silage intake throughout the feeding trial. G-2 group showed the highest silage intake while treatment G-4 showed the lowest silage intake for the first two months and treatment G-6 for the last two months. The results of growth rates (g/d/animal) showed that treatments G-1 and G-6, where no supplementation was given, had a weight loss throughout the feeding trial. However, weight loss in treatment G-6 was more severe than treatment G-1. Treatments G-2, G-3, G-4 and G-5 all showed weight gain however, treatment G-2 had the most gain. G-2 group also showed the highest wool production while G-6 the lowest. These results indicated that silage when made from full bloom crops of oats and silage fed alone without any supplementation causes weight loss in sheep. Supplementation with concentrates having 19% CP is far better than the crushed maize grain and maize silage is better than oats silage. Maize silage is superior than oat silage however, better performance could be expected if silages were made at the early bloom (dough) stage of plant maturity. The results indicate that treatment G-2 shows highest response while treatment G-6 the lowest. So the response of different treatments on both the parameters of weight gain and wool production is almost similar.

Validity of Estimating Sodium Intake using a Mobile Phone Application of 24-hour Dietary Recall with Meal Photos (식사사진을 이용한 24시간 식사 회상 모바일 폰 앱의 나트륨 섭취 추정 타당성 연구)

  • Kim, Seo-Yoon;Chung, Sang-Jin
    • Korean Journal of Community Nutrition
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    • v.25 no.4
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    • pp.317-328
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    • 2020
  • Objectives: The objective of this study was to verify the validity of a mobile phone application (app) that applies a 24-hour dietary recall with meal photos, as a means of being a more accurate method of estimating dietary sodium intake. Methods: Of the 203 subjects enrolled, 172 subjects (84 males and 88 females) were selected for the final analysis, excluding those with an intake less than 500 kcal and urine output less than 500 ml. Dietary sodium assessment methods used for comparing with the 24-hour urinary sodium excretion are as follows: 1) face-to-face 24-hour dietary recall, 2) 24-hour dietary recall using the mobile app, 3) face-to-face 24-hour dietary recall considering liquid intakes from soup, stew, water kimchi and noodle, etc (liquid-based dishes), 4) 24-hour dietary recall using the mobile app considering liquid intakes from liquid-based dishes, and 5) food frequency questionnaire. Repeated ANOVA with Bonferroni method was used for comparing the average sodium intake, and Pearson's correlation was applied to correlate the methods used. Results: In women, no significant difference was observed in the average sodium intake between all methods. Moreover, analysis in men and total adults revealed no significant difference between the 24-hour urinary sodium secretion, and 24-hour dietary recall using the app and 24-hour dietary recall using the app considering liquid intakes. Sodium intake by food frequency questionnaire was significantly different when compared with the intake determined from 24-hour urinary sodium excretion. Sodium intake from all methods (except food frequency questionnaire) significantly correlated with values obtained from 24-hour urine sodium excretion. Conclusions: Results of this study validated a mobile phone app using a 24-hour dietary recall with meal photos to better estimate dietary sodium intakes. It is believed that further studies in the future will enable the application as a tool to more accurately determine sodium intake.

The Clinical Value of the 24-hour Ambulatory ECG Monitoring in Patients with Chronic Atrial Fibrillation (Digoxin을 투여한 만성 심방세동 환자에서 24시간 Ambulatory ECG의 유용성)

  • Yang, Chang-Heon;Kim, Young-Jo;Shim, Bong-Sup;Lee, Hyun-Woo
    • Journal of Yeungnam Medical Science
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    • v.6 no.1
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    • pp.99-107
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    • 1989
  • 24-hour ambulatory ECG monitoring has been examined for the evaluation of heart rate and longest pause in 34 patients with chronic atrial fibrillation(20 patients treated with digoxin and 14 patients without treatment). Following results were obtained : 1. In 34 patients, the mean of average heart rates was $75.7{\pm}13.8$/minute, fastest heart rates $148.0{\pm}32.4$/minute, slowest heart rates $48.1{\pm}8.4$/minute, difference between fastest and slowest heart rates in individual patients $99.9{\pm}29.0$/minute and longest pauses $2.95{\pm}1.06$seconds. The longest pauses of more than 4.0 seconds occurred in 4 of the 34 patients and made an exeption of comparison groups. 2. In 27 of the 34 patients, ventricular premature contractures were developed and in 11 of 27, mainly occured less than 100/24 hours and aberrant conduction occurred in all patients. 3. In 20 patients treated with digoxin(0.25mg/day), the mean of average heart rates was $78.4{\pm}13.7$/minute, fastest heart rates $152.5{\pm}33.1$/minute, slowest heart rates $48.9{\pm}8.5$/minute, difference between fastest and slowest heart rates in individual patients $103.6{\pm}31.7$/minute and longest pauses $2.55{\pm}0.50$seconds. 4. In 10 patients without treatment, the mean of average heart rates was $78.0{\pm}10.7$/minute, fastest heart rates $154.5{\pm}26.8$/minute, slowest heart rates $50.6{\pm}7.1$/minute, difference between fastest and slowest heart rates in individual patients $103.9{\pm}22.2$/minute and longest pauses $2.66{\pm}0.39$seconds. 5. The difference of heart rates and longest pauses between patients with treatment and without treatment were statistically not significant(P>0.05). In summary, authors seemed to consider that 24-hour ambulatory ECG was useful and safe method for clinical evaluation of patients with chronic atrial fibrillation.

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A Study on the Improvement of Pyroelectric Coefficient in the PSS-PT-PZ Infrared Sensor (PSS-PT-PZ 적외선 센서의 초전계수향상에 관한 연구)

  • 이성갑;배선기;이영희
    • The Transactions of the Korean Institute of Electrical Engineers
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    • v.41 no.6
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    • pp.652-660
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    • 1992
  • 0.10Pb(SbS11/2TSnS11/2T)OS13T-0.25PbTiOS13T-0.65PbZrOS13T ceramics modified by LaS12TOS13T(1[mol%]) and MnOS12T(0-0.30[mol%]) were fabricated. The structural and pyroelectric properties with contents of MnOS12T were studied. Crystal structure of a specimen was rhombohedral type and average grain sizes were decreased with increasing the contents of MnOS12T. Relative dielectric constant and dielectric loss factor were minimum in the specimens doped 0.24[mol%]MnOS12T. (PbS10.99TLaS10.01T)[(SbS11/2TSnS11/2T) TiS10.25TZrS10.65T]OS13T specimen modified 0.24[mol%]MnOS12T showed the good pyroelectric properties and pyroelectric coefficient and voltage responsivity were 6.73x10S0-8T[C/cmS02TK], 125[V/W], respectively. Voltage responsivity was increased with decreasing the chopper frequency.