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Lamsal, Kabir,Kim, Sang-Woo,Jung, Jin-Hee,Kim, Yun-Seok,Kim, Kyong-Su,Lee, Youn-Su The Korean Society of Mycology 2011 Mycobiology Vol.39 No.3
Pepper anthracnose caused by Colletotrichum species is one of the most important limiting factors for pepper production in Korea, its management being strongly dependent on chemicals. The aim of this work was to evaluate the possibilities of using silver nanoparticles instead of commercial fungicides. In this study, we evaluated the effect of silver nanoparticles against pepper anthracnose under different culture conditions. Silver nanoparticles (WA-PR-WB13R) were applied at various concentrations to determine antifungal activities in vitro and in the field. The application of 100 ppm concentration of silver nanoparticles produced maximum inhibition of the growth of fungal hyphae as well as conidial germination in comparison to the control in vitro. In field trials, the inhibition of fungi was significantly high when silver nanoparticles were applied before disease outbreak on the plants. Scanning electron microscopy results indicated that the silver nanoparticles caused a detrimental effect on mycelial growth of Colletotrichum species.
Biocontrol of Late Blight and Plant Growth Promotion in Tomato Using Rhizobacterial Isolates
( Kabir Lamsal ),( Sang Woo Kim ),( Yun Seok Kim ),( Youn Su Lee ) 한국미생물 · 생명공학회 2013 Journal of microbiology and biotechnology Vol.23 No.7
Seven bacterial isolates (viz., AB05, AB10, AB11, AB12, AB14, AB15, and AB17) were derived from the rhizosphere and evaluated in terms of plant growth-promoting activities and the inhibition of Phytophthora infestans affecting tomatoes in Korea. According to 16S rDNA sequencing, a majority of the isolates are members of Bacillus, and a single isolate belongs to Paenibacillus. All seven isolates inhibited P. infestans by more than 60% in vitro. However, AB15 was the most effective, inhibiting mycelial growth of the pathogen by more than 80% in vitro and suppressing disease by 74% compared with control plants under greenhouse conditions. In a PGPR assay, all of the bacterial isolates were capable of enhancing different growth parameters (shoot/root length, fresh biomass, dry matter, and chlorophyll content) in comparison with non-inoculated control plants. AB17-treated plants in particular showed the highest enhancement in fresh biomass with 18% and 26% increments in the root and shoot biomass, respectively. However, isolate AB10 showed the highest shoot and root growth with 18% and 26% increments, respectively. Moreover, the total chlorophyll content was 14%~19% higher in treated plants.
Research Note: Three New Records of Penicillium Species Isolated from Insect Specimens in Korea
( Kabir Lamsal ),( Sang Woo Kim ),( Shahram Naeimi ),( Mahesh Adhikari ),( Dil Raj Yadav ),( Changmu Kim ),( Hyang Burm Lee ),( Youn Su Lee ) 한국균학회 2013 Mycobiology Vol.41 No.2
Three Penicillium species have been isolated from insect specimens in Korea; Penicillium sp., P. steckii, and P. polonicum. Penicillium sp. (KNU12-3-2) was isolated from Lixus imperessiventris, while P. polonicum (KNU12-1-8) and Penicillium steckii (KNU12-2-9) were isolated from Muljarus japonicas and Meloe proscarabaeus, respectively. The identification was based on the morphological characteristics of the fungi and in internal transcribed spacer analysis. This is the first report on the isolation of these three species of Penicillium from insects in Korea.
( Kabir Lamsal ),( Sang Woo Kim ),( Jin Hee Jung ),( Yun Seok Kim ),( Kyong Su Kim ),( Youn Su Lee ) 한국균학회 2011 韓國菌學會誌 Vol.39 No.3
Pepper anthracnose caused by Colletotrichum species is one of the most important limiting factors for pepper production in Korea, its management being strongly dependent on chemicals. The aim of this work was to evaluate the possibilities of using silver nanoparticles instead of commercial fungicides. In this study, we evaluated the effect of silver nanoparticles against pepper anthracnose under different culture conditions. Silver nanoparticles (WA-PR-WB13R) were applied at various concentrations to determine antifungal activities in vitro and in the field. The application of 100 ppm concentration of silver nanoparticles produced maximum inhibition of the growth of fungal hyphae as well as conidial germination in comparison to the control in vitro. In field trials, the inhibition of fungi was significantly high when silver nanoparticles were applied before disease outbreak on the plants. Scanning electron microscopy results indicated that the silver nanoparticles caused a detrimental effect on mycelial growth of Colletotrichum species.
( Kabir Lamsal ),( Sang Woo Kim ),( Yun Seok Kim ),( Youn Su Lee ) 한국균학회 2012 Mycobiology Vol.40 No.4
In vitro and greenhouse screening of seven rhizobacterial isolates, AB05, AB10, AB11, AB12, AB14, AB15 and AB17, was conducted to investigate the plant growth promoting activities and inhibition against anthracnose caused by Colletotrichum acutatum in pepper. According to identification based on 16S rDNA sequencing, the majority of the isolates are members of Bacillus and a single isolate belongs to the genus Paenibacillus. All seven bacterial isolates were capable of inhibiting C. acutatum to various degrees. The results primarily showed that antibiotic substances produced by the selected bacteria were effective and resulted in strong antifungal activity against the fungi. However, isolate AB15 was the most effective bacterial strain, with the potential to suppress more than 50% mycelial growth of C. acutatum in vitro. Moreover, antibiotics from Paenibacillus polymyxa (AB15) and volatile compounds from Bacillus subtilis (AB14) exerted efficient antagonistic activity against the pathogens in a dual culture assay. In vivo suppression activity of selected bacteria was also analyzed in a greenhouse with the reference to their prominent in vitro antagonism efficacy. Induced systemic resistance in pepper against C. acutatum was also observed under greenhouse conditions. Where, isolate AB15 was found to be the most effective bacterial strain at suppressing pepper anthracnose under greenhouse conditions. Moreover, four isolates, AB10, AB12, AB15, and AB17, were identified as the most effective growth promoting bacteria under greenhouse conditions, with AB17 inducing the greatest enhancement of pepper growth.
Luo, Xia,Lamsal, Laxmi Pangeni,Xu, Wen-Juan,Lu, Jie,Lu, Yan-Jun,Shen, Ying,Guan, Qing Asian Pacific Journal of Cancer Prevention 2014 Asian Pacific journal of cancer prevention Vol.15 No.21
Background: Rs31489 in the cleft lip and palate transmembrane1-like gene (CLPTM1L) has been identified to be associated with lung cancer through genome-wide association studies (GWAS). However, some recent replication studies yielded inconclusive results. Thus, we undertook this study to investigate the precise effect of rs31489 on lung cancer susceptibility. Materials and Methods: A hospital-based case-control study in 1,673 Chinese subjects (611 individuals with lung cancer and 1,062 controls) and a meta-analysis among 32,199 subjects (16,364 cases and 15,835 controls) were performed in this study. Results: In our case-control study, rs31489 was inversely associated with lung cancer (AC versus CC: OR=0.68, 95%CI=0.52-0.88; additive model: OR=0.68, 95%CI=0.54-0.85; dominant model: OR=0.65, 95%CI =0.51-0.84). Stratification analysis by smoking status showed a significant association and strong genetic effect in non-smokers but not in smokers. Our meta-analysis further confirmed the association, although with significant heterogeneity contributed by study design and source of controls, as shown by stratified analysis. Sensitive and cumulative analyses both indicated robust stability of our results. In addition, there was no observable publication bias in our meta-analysis. Conclusions: Overall, the findings from our replication study and meta-analysis demonstrated that CLPTM1L gene rs31489 is significantly associated with lung cancer.
A Report of Aspergillus niger Isolated from Pectocera fortunei Specimen in Korea
( S. W. Kim ),( K. Lamsal ),( S. Naeimi ),( M. Adhikari ),( D. R. Yadav ),( Y. S. Lee ) 강원대학교 농업생명과학연구원(구 농업과학연구소) 2014 강원 농업생명환경연구 Vol.26 No.3
A new species of Aspergillus niger (KNU12-3-3) has been isolated from insect specimen in Korea. This strain was isolated from Pectocera fortunei. The identification was based on the morphological characteristics and ITS analysis. This is the first report of a new species of A. niger isolated from insects in Korea.
( Rajendra Kc ),( Madhab Lamsal ),( Prahlad Karki ),( Shankar Majhi ),( Nirmal Baral ) 대한내과학회 2014 대한내과학회 추계학술발표논문집 Vol.2014 No.1
Background: Several potential cardiovascular risk factors were reported in patients with subclinical hypothyroidism (SCH) but the association still remains controversial therefore, we aimed to evaluate cardiovascular risk factors in subjects with subclinical hypothyroidism. Methods: A total of 100 subjects with subclinical hypothyroidism and 100 age and gender matched euthyroid controls, were included in the study. Serum free T3, free T4 and TSH were estimated by fl uorescent immunoassay. Total cholesterol (TC), low density lipoprotein cholesterol (LDL-C) and high density lipoprotein cholesterol (HDL-C) were assayed by enzymatic colorimetric method, and high sensitivity C-reactive protein (hs-CRP) by enzyme immunoassay. Data were analyzed by SPSS version 20. Results: Mean levels of diastolic blood pressure (82.1±6.0 vs 79.1±6.1 mmHg, p=0.001), total cholesterol (199.6±31.6 vs 184.3±30.8 mg/dl, p=0.001) and LDL-C (104.0±27.5 vs 94.6±25.4, p=0.012), and median hs-CRP (0.92 (0.30-2.17) vs 0.56 (0.33-1.35), p=0.03) were significantly higher in SCH than the euthyroids. Within the SCH group, mean diastolic blood pressure, TC, LDL-C, and median hs-CRP levels were signifi cantly higher in subjects with TSH=10 mU/L than those with TSH<10 mU/ L. Individual analysis revealed that the prevalence of borderline elevated total cholesterol (=200mg/dL), elevated LDL-C (=100mg/dL) and raised hs-CRP (=3mg/L) were signifi cantly higher in SCH than ineuthyroid group. TSH levels in SCH was positively correlated with diastolic blood pressure (r=0.33, p=0.001), total cholesterol (r=0.39, p<0.001), LDL-C (r=0.42, p<0.001) and hs-CRP (r=0.51, p<0.001). Conclusions: Subclinical hypothyroidism was associated with higher diastolic blood pressure, higher total cholesterol, LDL-C and higher hs-CRP levels, this might increase the risk of accelerated arteriosclerosis.
Banik Sujoy,Rath Girija P,Lamsal Ritesh,Bithal Parmod K 대한마취통증의학회 2020 Korean Journal of Anesthesiology Vol.73 No.4
Background: There are conflicting opinions on the effect of dexmedetomidine on cerebral autoregulation. This study assessed its effect on dynamic cerebral autoregulation (dCA) using a transcranial Doppler (TCD). Methods: Thirty American Society of Anesthesiologists physical status I and II patients between 18 and 60 years, who underwent lumbar spine surgery, received infusions of dexmedetomidine (Group D) or normal saline (Group C), followed by anesthesia with propofol and fentanyl, and maintenance with oxygen, nitrous oxide and sevoflurane. After five minutes of normocapnic ventilation and stable bispectral index value (BIS) of 40–50, the right middle cerebral artery flow velocity (MCAFV) was recorded with TCD. The transient hyperemic response (THR) test was performed by compressing the right common carotid artery for 5–7 seconds. The lungs were hyperventilated to test carbon dioxide (CO2) reactivity. Hemodynamic parameters, arterial CO2 tension, pulse oximetry (SpO2), MCAFV and BIS were measured before and after hyperventilation. Dexmedetomidine infusion was discontinued ten minutes before skin-closure. Time to recovery and extubation, modified Aldrete score, and emergence agitation were recorded. Results: Demographic parameters, durations of surgery and anesthesia, THR ratio (Group D: 1.26 ± 0.11 vs. Group C: 1.23 ± 0.04; P = 0.357), relative CO2 reactivity (Group D: 1.19 ± 0.34 %/mmHg vs. Group C: 1.23 ± 0.25 %/mmHg; P = 0.547), blood pressure, SpO2, BIS, MCAFV, time to recovery, time to extubation and modified Aldrete scores were comparable. Conclusions: Dexmedetomidine administration does not impair dCA and CO2 reactivity in patients undergoing spine surgery under sevoflurane anesthesia.