• Journal of Hydrogen and New Energy
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• v.33 no.3
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• pp.202-208
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• 2022

Pt-Ni nanocatalysts were loaded on carbon black by spontaneous reduction reaction of platinum (II) acetylacetonate and nickel (II) acetylacetonate, and they were characterized by transmission electron microscopy (TEM), thermogravimetric analyzer (TGA), energy dispersive x-ray analyzer (EDS), BET surface area and fuel cell test station. The distribution of the Pt and Ni nanoparticles was observed by TEM, and the loading weight of Pt-Ni nanocatalysts on the carbon black was measured by TGA. The elemental ratio of Pt and Ni was estimated by EDS. It was found that the loading weight of Pt-Ni nanoparticles was 5.54 wt%, and the elemental ratio of Pt and Ni was 0.48:0.35. Specific surface area was measured by BET analysis instrument and I-V characteristics were estimated.

• YAKHAK HOEJI
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• v.43 no.3
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• pp.369-377
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• 1999

A new series of highly water soluble platinum(II) complexes {Pt(II)[1,3-bis(phenylthio) propane](trans- -1,2-diaminocyclohexane) (PC-1) and Pt(II)[1,3-bis-(phenythio)propane] cis-1,2-diaminocyclohexane(PC-2)} were synthesized, and characterized by their elemental analysis and by various spectroscopic techniques[infrared(IR), 13C-nuclear magnetic resonance (NMR)]. In vitro antitumor activity of new Pt(II) complexes was tested against P-388 and L-1210 mouse lymphocytic leukemia cell lines, PC-14 / P, PC-14/ADM and PC-14 / CDDP human pulmonary adenocarcinima, DU-145 human prostate carcinoma, HT-1376 human bladder carcinoma, ZR-75-1 human breast carcinoma, MKN-45/P and MKN-45/CDDP human gastric adenocarcinoma cell lines using colorimetric MTT[3-(4,5-dimethyl thiazol-2-yl)-2.5-diphenyltetrazoliumbromide] assay for cell survival and proliferation. PC-1 showed active against L-1210, P-388 leukemia, human lung, stomach, prostate, bladder and breast cancer cell lines, and the antitumor activity of these compounds were comparable or superior to those of PC-2 and displatin. The nephrotoxicities of PC-1 and PC-2 were found quite less than that of cisplatin using MTT and [3H] thymidine uptake in rabbit proximal tubule cells and human kidney cortical cells. Based on these results, this novel platinum (II) complex compound (PC-1) represents a valuable lead in the development of a new anticancer chemotherapeutic agent capable of improving antitumor activity and low nephrotoxicity.

• Journal of Hydrogen and New Energy
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• v.34 no.5
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• pp.421-430
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• 2023

Fe-Ni-Pt nanocatalysts were loaded on carbon black powders which were synthesized by a spontaneous reduction reaction of iron (II) acetylacetonate, nickel (II) acetylacetonate and platinum (II) acetylacetonate. The morphology and the loading weight of Fe-Ni-Pt nanoparticles were characterized by transmission electron microscopy and thermogravimetric analyzer. The amount of Fe-Ni-Pt catalyst supported on the carbon black surface was about 6.42-9.28 wt%, and the higher the Fe content and the lower the Pt content, the higher the total amount of the metal catalyst supported. The Brunauer-Emmett-Teller Analysis (BET) specific surface area of carbon black itself without metal nanoparticles supported was 233.9 m²/g, and when metal nanoparticles were introduced, the specific surface area value was greatly reduced. This is because the metal nanocatalyst particles block the pore entrance of the carbon black, and thereby the catalytic activity of the metal catalysts generated inside the pores is reduced. From the I-V curves, as the content of the Pt nanocatalyst increased, the electrolytic properties of water increased, and the activity of the metal nanocatalyst was in the order of Pt > Ni > Fe.

• Biomolecules & Therapeutics
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• v.11 no.2
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• pp.91-98
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• 2003

A new series of highly water soluble platinum(II) complexes[Pt(II)(DL-2-hydroxy-3-methylbutyrate)(trans-l-1,2-dimninocyc1ohexane)] (PC-1) and [Pt(II)DL-2-hydroxy-3-methylbutyrate](cis-1,2-diaminocyclohexane)](PC-2) were synthesized and characterized by their elemental analysis and by various spectroscopic techniques [infrared(IR), $^{13}C$-nuclear magnetic resonance (NMR)]. In vitro antitumor activity of new Pt(II)complexes was tested against MKN-45, MKN/ADM and MKN/CDDP human gastric adenocarcinoma cell lines using colorimetric MTT[3-(4,5-dimethyl thiazol-2-yl)-2,5-diphenyltetrazoliumbromide] assay for cell survival and proliferation. PC-1 and PC-2 showed active against MKN-45/P, MKN/ADM and MKN/CDDP human gastric cancer cell lines, and the antitumor activity of these compounds were comparable or superior to that of cisplatin. The nephrotoxicities of PC-1 and PC-2 were found quite less then that of cisplatin using MTT and [$^3H$] thymidine uptake tests in rabbit proximal tubule cells, human kidney cortical cells human renal cortical tissues. Based on these results, these novel platinum(II) complex compounds(PC-1 ＆ PC-2) represent a valuable lead in the development of the new anticancer chemotherapeutic agents capable of improving antitumor activity and low nephrotoxicity.

• Proceedings of the Korean Society of Applied Pharmacology
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• 1995.04a
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• pp.119-119
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• 1995

This study was performed to evaluate the general toxicity of novel Pt(II) complexes, (KHPC-002: [Pt(trans-1-dach) (DPPE)].2NO$_3$, KHPC-005: [Pt(cis-dach)(DPPE)].2NO$_3$ and KHPC-006: [Pt(cis-dach)(DPPP)]. 2NO$_3$). In the acute toxicity study in rats, three dosing groups of Sprague-Dawley male rats in each compounds were given a single intraperitoneal injection of KHPC-002, KHPC-005 and KHPC-006. In order to compare the toxic effects of these novel Pt(II) complexes with those of cisplatin, one group Sprague-Dawley male rats were given 7mg/kg i.p injection of cisplatin. Body weights showed dose-related decrease in all treatment groups when compared wi th the control group.

• Proceedings of the Korean Society of Applied Pharmacology
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• 1995.04a
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• pp.120-120
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• 1995

This study was conducted to examine novel Pt(II) complexes, (KHPC-002; [Pt(trans-1-dach) (DPPE)]. 2NO$_3$, KHPC-005;[Pt(cis-1-dach)(DPPP)]. 2NO$_3$ and KHPC-006; [Pt(cis-1-dach) (DPPE)]. 2NO$_3$) for their acute toxicities and toxicological profiles in preclinical studies. In male and female mice given a single intraperitoneal administration of KHPC-002, KHPC-005 and LHPC-006, we determined that LD$\_$50/ values of pt(II) complexes were 295.5mg/kg(M), 350.4mg/kg(F);KHPC-002, 158.7mg/kg(M), 157.7mg/kg(F); KHPC-005, 574.8mg/kg(M), 596.5 mg/kg (F); KHPC-006, respectively. In gross and histopathological examination on dead animals, no abnormal changes were observed in any organs.

• Proceedings of the Korean Society of Applied Pharmacology
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• 1995.04a
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• pp.121-121
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• 1995

This study was conducted to examine novel Pt(II) complexes, (KHPC-002: [Pt(trans-1-dach) (DPPE)]. 2N0$_3$, KHPC-005: [Pt(cis-dach) (DPPE)] 2NO$_3$ and KHPC-006: [Pt(cis-dach) (DPPP)]. 2NO$_3$) for their acute toxicities. In male and female mice given a single intraperitoneal administration of KHPC-002, KHPC-005 and KHPC-006, we determined that LD$\_$50/ values of Pt(II) complexes were 295.5mg/kg(M), 350.4mg/kg(F) : KHPC-002, 596.5mg/kg(M), 674,8mg/kg(F): KHPC-005, 158.7mg/kg(M), 157.7mg/kg(F); KHPC-006, respectively. The signs of toxicity in mice observed fellowing the administration of these compounds included the followings: decreased mortor activity: abnormal gait: salviation, trasient decreased body weight. There were no treatment related specific changes in growth examination.

• The Journal of Korean Physical Therapy
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• v.31 no.1
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• pp.7-12
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• 2019

Purpose: This study examined the effects of stretching and strengthening exercises on the pain, pelvic tilt (PT), functional disability, and balance of patients with chronic lower back pain (CLBP). Methods: A total of 42 patients with CLBP were randomly divided randomly into either experimental group I (EG I, n=21), who received stretching exercise, or experimental group II (EG II, n=21), who received strengthening exercise. Both interventions were applied three times a week for eight weeks. Assessments were made with a visual analogue scale (VAS), PT, Oswestry disability index (ODI), and Berg's balance scale (BBS) before and after the eight weeks intervention period. A paired t-test was conducted to compare the within-group changes before and after the intervention. An independent t-test was used compare the between-group difference. The statistical significance level was set to ${\alpha}=0.05$ for all variables. Results: The EG I and II showed significant within-group changes in the VAS, PT, ODI, and BBS (p<0.05). The changes in VAS, PT, ODI, and BBS were similar regardless of the exercise form. Conclusion: In this study, the application of stretching and strengthening exercise for subjects who complain of CLBP was effective in changing the level of pain, PT, functional disability, and balance.

• YAKHAK HOEJI
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• v.44 no.2
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• pp.149-154
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• 2000

Flavin mononucleotide (1,4-butanediamine) Pt(II) complex (7FMN) was synthesized and screened anticancer activity [J. Pharm. Soc. Korea 43(6),762-770 (1999)]. 7FMN have good water solubility and moderate anticancer activiy In this paper cell-cycle specificity and nephrotoxicity were studied. Interaction of DNA with cisplatin and synthesized 7FMN was analyzed by flow cytometry and showed G2 arrest in L1210 cell line. It means that cell-cycle on L1210 was inhibit in S phase by cisplatin and 7FMN. In order to biochemically analyze nephrotoxicity of cisplatin and 7FMN, after injecting each agent intraperitoneally, blood was exsanguinated after 6 hours, 1 day, 3 days and 7 days, respectively. Then, serum was separated from the blood. The serum level of BUN, creatinine and uric acid in cisplatin and 7FMN administated mice (25~35 g, ICR strain, a dose each 8,12 and 16 times of the $IC_{50}$/ value, cisplatin; 7 times) were determined by autochemistry analyzer. In cisplatinadministered mice group, BUN level was elevated than normal control group at 3rd day and repaired at 7th day. In 7FMN administrated group was not elevated. Creatinine and uric acid level were no difference with the normal control group. Therefore synthesized 7FMN is less toxic than cisplatin in nephrotoxiciaty.

• Bulletin of the Korean Chemical Society
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• v.29 no.3
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• pp.599-603
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• 2008

The complexes Pd(nbmtp)Cl2 and Pt(nbmtp)Cl2 (nbmptp = 1-nonyl-3,4-bis(methylthio)pyrrole) were prepared and their x-ray structures were determined at room temperature. The four-coordinated metal unit and the pyrrole ring formed a nearly planar geometry. The free ligand dissolved in CH2Cl2 produced two luminescence bands associated with the lone-pair electron of S (l max = 525 nm) and the pyrrole p electron (l max = 388 nm). When the two complexes were dissolved in CH2Cl2, these two luminescence bands were also observed, although the low-energy band was blueshifted. For the crystalline Pt(II) complex, only the strong charge transfer band (l max = 618 nm) from the d* orbital of Pt resulted from excitation of the lone-pair electron of S.