• Interdisciplinary Bio Central
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• 제2권2호
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• pp.3.1-3.4
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• 2010

In the present research, we assessed the utility of the structural information of drugs for predicting human in vivo intrinsic clearance from in vitro intrinsic clearance data obtained by human hepatic microsome experiment. To compare with the observed intrinsic clearance, human intrinsic clearance values for 51 drugs were estimated by the classical methods using in vivo-in vitro scale-up and by the new methods using the in vitro experimental data and selected molecular descriptors of drugs by the forward selection technique together. The results showed that taking consideration of molecular descriptors into prediction from in vitro experimental data could improve the prediction accuracy. The in vitro experiment is very useful when the data can estimate in vivo data accurately since it can reduce the cost of drug development. Improvement of prediction accuracy in the present approach can enhance the utility of in vitro data.

• 한국가축번식학회지
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• 제4권1호
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• pp.75-82
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• 1980

This experiment was carried out to improve a simple and effective procedure of egg transfer which is considered to be the most useful technique for the improvementand proliferation of domestic animals. Several experiment procedures such as superovulation, surgical recovery of ovulated egg, in vitro capacitation of ejaculated spermatozoa, in vitro fertilization and culture of embryo were conducted. The results obtained in this experiment were summarized as follows: 1. In rabbits treated with PMS in combination with estradiol and HCG, 10 to 43 eggs were obtained in one rabbit and the average ovulation number of 20 rabbits was 21 eggs. 2. Six to 24 eggs (average 13 eggs) were recovered from the removed oviducts by the methods of flushing technique and the average recovery rate of 20 rabbits was 61.9 percent. 3. Most rabbit spermatozoa ejaculated by artificial vagina were capacitated in vitro by the culture of the spermatozoa with PBI medium at 37$^{\circ}C$ for 4 hours after removal of seminal plasma. 4. Normal fetilization following in vitro fetilization was observed in 88 (42.7%) of 206 eggs. 5. The number of eggs developed to 2-, 4-, and 8-cell stage following in vitro culture with PBI medium at 37$^{\circ}C$ was 26 (70.3%), 20 (54.1%) and 17 (45.9%) of 37 eggs used for in vitro culture.

• 대한의용생체공학회:학술대회논문집
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• 대한의용생체공학회 1993년도 추계학술대회
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• pp.110-113
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• 1993

An in vitro experiment under laminar non-pulsatile blood flow and an acute canine ex vivo femoral A-V series shunt experiment were undertaken to investigate the effectiveness of saline perfusion through pores of porous tubes to prevent formation of mural thrombus. PS/SBR porous tubes were used for the in vitro experiment. Commercially obtained ePTFE porous tubes were etched by sodium naphthalenide, and the etched tubes were used for the ex vivo experiment. According to the results of the in vitro experiment, mural thrombus on the surface of the porous tribe could be prevented by the saline perfusion. Adhered blood cells decreased semi-logarithmically with increased perfusion rate (up to $0.022\;ml/min-cm^2$) of isotonic saline solution. According to results of the ex vivo experiment, mural thrombus decreased with increased perfusion rate (upto $0.060\;ml/min-cm^2$).

• Asian-Australasian Journal of Animal Sciences
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• 제8권2호
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• pp.123-127
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• 1995

In vitro embryo production (IVP) is affected by various factors during in vitro maturation, fertilization, and development. In this experiment, the effect of ovary type, quality of follicular oocyte, medium used for fertilization, presence of hormone in medium, sperm concentration on in vitro maturation and fertilization were examined for effective IVP. In vitro maturation was carried out using TCM-199 supplemented with 15% FCS and hormones in 5% $CO_2$ incubator for 24h. In vitro fertilization was performed with frozen-thawed sperm in modified mTALP medium containing 0.3% BSA, $10{\mu}g/ml$ heparin, and 5mM/ml caffeine for 24h. The fertilized embryos were co-cultured on monolayer of cumulus cells in TCM-199. When oocytes were collected from functionally active and inactive ovaries, maturation rate was 76.9 and 7.7%, respectively. When oocytes were classified morphologically to good and poor grades, maturation rate was 75 and 58.8%, respectively. FSH + LH + $E_2$ (86.4%) showed higher maturation rate than control (53.0%) and FSH (73%). The fertilization rate was 28.2, 100 and 91.7% in $1.6{\times}10^5$, $5.0{\times}10^5$ and $10.0{\times}10^5$ sperm concentration per ml. When oocytes were fertilized in mTALP and BO media, fertilization and cleavage rates of oocytes in mTALP were higher (84.3 and 56.9%) than those (67.4 and 23.3%) in BO medium. In this experiment, in vitro maturation, fertilization and development of oocytes were affected by type of ovary, grade of oocyte, hormones, sperm concentration and fertilization medium.

• 한국가축번식학회지
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• 제22권1호
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• pp.95-99
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• 1998

Three experiments were conducted with follicular oocytes, to compare some somatic cells, growth factors and media for in vitro maturation of bovine oocytes. In the first experiment, the type of somatic cells had no effects on in vitro maturation of bovine follicular ooctyes. In the second experiment, oocytes were matured in TCM199 su, pp.emented with growth factors on IVM of bovine follicular oocytes, then all were co-cultured with cumulus cells. The proportion of used oocytes that developed to expanding blastocysts was 22.2%, 20.2%, 17.7%, 22.2%, 24.4% and 20.2% after maturation in TCM199 su, pp.emented with control, insulin, IGF-I, IGF-Ⅱ, FGF and EGF, respectively. In the third experiment, oocytes were matured in BO, Ham's F10 and TCM199, then all were fertilized in BO, and embryos cultured in BO, Ham's F10 and TCM199, respectively. Cleavage rates in BO were 90%, had higher than in Ham's F10(80%) or in TCM199(64%). But production of expanding blastocysts in TCM199(21%) or Ham's F10(20.6%), had higher than in BO(4.6%).

• Asian-Australasian Journal of Animal Sciences
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• 제11권1호
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• pp.8-12
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• 1998

Two experiments were conducted to determine the effects of $MnSO_4$ on controlling harmful microorganisms in vitro and in vivo. The in vitro experiment was conducted to examine the effects of manganese sulfate $(MnSO_4)$ on the reduction of Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus) by growth stimulation of Pediococcus acidilactici (P. acidilactici; lactic acid bacteria). Manganese ion (0.003 %) was found to stimulate the growth of P. acidilactici in the In Vitro system. When E. coli and S. aureus were grown in a mixture with P. acidilactici, their numbers were reduced. This may be the result of a reduction of pH in the medium as a result of better growth of P. acidilactici due to stimulation by the Mn ion. The in vivo experiment was conducted to determine the effects of $MnSO_4$ in diets on controlling harmful microorganisms in fecal samples of pigs. There were no significant differences for the microbial numbers (i.e., total microorganisms, E. coli, lactic acid bacteria and S. aureus) in feces of pigs fed $MnSO_4$ compared to feces of pigs fed the control diet through 7 days. However, on day 7 of experiment, the pH of feces in pigs fed $MnSO_4$ (0.1%) decreased faster than pigs fed the control diet.

• 동아시아식생활학회지
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• 제4권2호
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• pp.59-67
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• 1994

The present study was conducted to evaluate the hepatoprotective effect of puerariae Radix methanol extract on benzo(a) pyrene(B(a)P) - induced liver injuries in rats. In vitro experiment, primary cultured hepatocytes (5X105 cells/$m\ell$) were cultured for 20~24 hours after adding puerariae Radix mehtanol extract(32$\mu\textrm{g}$/$m\ell$) and B(a)P(50 uM). In vivo experiment, Puerariae Radix methanol extract(0.25 g/kg/day, per os) was administered for 7 days and B(a)P(0.1 mg/kg/day, intraperitoneally) was given after the last administration of extract. And then the hepatoprotective effect of Puerariae Radix methanol extract was investigated biochemically through in vitro and in vivo experiments. Namely, activities of enzymes (GOT, GPT and LDH) were measured and 3-(4,5-dimethylthiazol-2-yl)-2, 5-diphenyl tetrazolium bromide(MTT) assay were carried out in vitro cell culture study and GOT, GPT, LDH and ALP activities and HDL-cholesterol, total cholesterol and triglyceride contents were performed in vivo study. In vitro experiment, as a result of enzyme activity measurement(GOT, GPT and LDH) and MTT assay, GOT,GPT and LDH activities changed by B(a)P were recovered to normal levels and hepatocytes impaired by B(a)P were recovered to normal. In vivo experiment, Puerariae Radix methanol extract significantly decreased the enzyme activities(GOT, GPT, ALP and LDH in serum and GPT and ALP in tissue) and lipid contents in comparison to B(a)P-treated group.

• 원예과학기술지
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• 제31권5호
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• pp.633-639
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• 2013

딸기의 잿빛곰팡이병과 흰가루병을 방제하기 위해 개화기에 살균제 처리가 요구된다. 최근에 딸기에 등록된 살균제들이 딸기 화분 발아에 미치는 영향은 거의 알려지지 않았다. 따라서 본 연구에서는 in vitro 상에서 딸기 3품종의 화분에 대한 24종의 살균제와 6종의 친환경자재에 대해 발아에 미치는 영향을 조사하였다. 딸기의 화분은 18% sucrose agar 배지에서 $25^{\circ}C$로 처리되었을 때 쉽게 발아되었으며, '설향', '매향', '금향'의 평균 화분 발아율은 각각 15.3, 18.4, 30.7%을 보였다. Pyraclostrobin, azoxystrobin, kresoxim-methyl, dichlofluanid, iminoctadine tris, sulfur는 무처리구 대비 93.8% 이상의 화분 발아 억제가를 나타내었다. 반면, simeconazole과 procymidone 살균제의 화분 발아율은 영향이 가장 적었다. 이 in vitro 검정 결과는 딸기 재배농가의 개화기 살균제 선정에 대한 정보를 제공할 수 있을 것이다.

• 한국수정란이식학회지
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• 제10권1호
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• pp.53-63
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• 1995

The effects of different protein sources (serum vs bovine serum albumin), growth factors (EGF and PDGF) and co-culture with various type of somatic cel1s (BOEC, MEF and BRL) on the in vitro development of in vitro matured / in vitro fertilized bovine oocytes were examined, and the viability of frozen/thawed embryos derived from IVM /IVF was examined. Cell numbers of blastocysts were also counted. In Experiment 1, CR$_1$aa with serum was superior to CR$_1$aa with BSA in producing morulae plus blastocysts from IVM /IVF oocytes(24.4% vs 30.4%, p>0.05). In Experiment 2, more morulae plus blastocysts(42.3%) were produced in CR$_1$aa containing long /ml EGF than in the control CR$_1$aa(33.3%). In Experiment 3, 2- to 8-cell embryos derived from IVM /IVF oocytes were randomly allotted to one of 4 culture groups : a) CR$_1$aa ; b) CR$_1$aa + ing /ml PDGF ; CR$_1$aa + Sng /ml PDGF ; CR$_1$aa + lOng /ml PDGF ; culture resulted in 21.3, 51.2, 41.4 and 45.9%(p<0.05), respectively, developing into morulae and blastocysts. In Experiment 4, 0 and Sng /ml PDGF added to CR$_1$aa coculture with BRL or BOEC yielded 47.5, 42.5, 33.8 and 41.6% morulae and blastocysts, respectively. In Experiment 5, the proportion of embryos into morulae and blastocysts was highest in CR$_1$aa with MEF coculture group(50.9%) compared to any other group(CR$_1$aa, 22.3%; CR$_1$aa+BRL, 32.9%; CR$_1$aa+BOEC, 33.8%, p>0.05). In Experiment 6, survival rate of blastocysts produced by in vitro fertilization when cryoprotectant was removed in 0.7M glycerol+0.7M sucrose and 0.7M sucrose solution for 10 min. after thawing at 2$0^{\circ}C$ (Exp. H, 58.8%) was slightly higher than when cryoprotectant was removed 10%, 6.7% and 3.3% glycerol for 10 min. after thawing at 37$^{\circ}C$ (Exp. I, 54.3%). These study indicate that growth factors and somatic cell co-culture can increase the proportion of embryos that develop into morulae and blastocysts without an increase in the cell number and frozen /thawed method employed this experiment was not different.

• Asian-Australasian Journal of Animal Sciences
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• 제18권3호
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• pp.354-357
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• 2005

The in vitro degradability of yeast and the effect of yeast on the in vitro degradability of forage may differ in terms of the specific yeast strains or their incubation conditions. Thus in experiment 1, two strains of sake yeast (strainK7 and strainK9) and one strain of bakers' yeast (KY5649) were incubated in an aerobic condition. In experiment 2, aerobically or anaero bically incubated K7 was used for investigating the in vitro degradability of yeast, the effect of yeast on the in vitro degradability of forage, and the degradability of yeast by pepsin and pronase treatment. The in vitrodegradability of bakers' yeast was significantly (p<0.05) higher than those of sake yeasts. The in vitro degradability of anaerobically incubated yeast was significantly (p<0.01) higher than that of aerobically incubated yeast. The degradability of bakers' yeast by pepsin treatment was significantly (p<0.01) higher than that of the sake yeasts. The degradability of bakers' yeast by pronase treatment was slightly higher than that of the two sake yeasts, while the degradability of anaerobically incubated yeast by both enzymes, respectively, was significantly (p<0.01) higher than that of aerobically incubated yeast. The degradability of forages was increased significantly (p<0.05) by the addition of yeasts. The degradability of roughage by sake yeast tended to be higher than that by the bakers' yeast. The degradability of roughage was significantly (p<0.05) higher by anaerobically incubated yeast than by aerobically incubated yeast. Given the above results, it seems that in vitro degradability of yeast and the magnitude of the increment of roughage degradation differ among the yeast strains and their incubation conditions.