Effects of Temperature, pH, and Relative Humidity on Growth of Penicillium expansum OM1 and its Patulin Production on Apple Puree Agar Medium

Haiyi Yu,Jeoung Gyu Lee,Wencai Zhao,Shengming Gao,Qing Chu,Shuxian Ma,Yidan Ji,Jinhuan Qu,Junzheng Wang,Liyuan Hao,Sung-Yong Hong,Ae-Son Om 한국식품영양과학회 2022 한국식품영양과학회 학술대회발표집 Vol.2022 No.10

Disturbance, Diversity, Regeneration and Composition in Temperate Forests of Western Himalaya, India

Om Prakash Tiwari,Chandra Mohan Sharma,Yashwant Singh Rana,Ram Krishan 강원대학교 산림과학연구소 2019 Journal of Forest Science Vol.35 No.1

We have investigated the impact of anthropogenic and natural disturbances on regeneration, composition and diversity in some temperate forests of Bhagirathi Catchment Area of Garhwal Himalaya. The forests were categorized on the basis of canopy cover and magnitude of disturbance into highly, moderately and least disturbed classes. The dominant tree species at lower elevation were Pinus roxburghii and Quercus leucotrichophora, while Abies pindrow, Q. semecarpifolia and Rhododenron arboreum were the dominant species at the upper elevational forests. Cythula tomentosa and Indegophera heterentha were the dominant shrub species present in all the forests. Similarly, Circium wallichii and Oxalis corniculata were the dominant herb species found in all forests (except Q. leucotrichophora forest), whereas Thalictrum foliolosum and Viola pilosa were noticed in each forest (except P. roxburghii forest). The tree density values oscillated between 400±10 trees ha-1 to 750±89.1 trees ha-1 which generally decreased from lower to higher disturbance regimes however, the total basal cover value was highest (88.1±23.6 m2 ha-1) in highly disturbed forest and lowest (25.8±2.2 m2 ha-1) in moderately disturbed forest. The shrub and herb densities were maximum in least disturbed forest, while the young regenerating individuals i.e., sapling and seedling were observed increasing from high to low disturbed forests which reflected that the forest fragmentation adversely affected the regeneration. However, A. pindrow and P. roxburghii were found invariably encroaching the habitats of R. arboreum and Q. leucotrichophora at various altitudes, respectively. The Canonical Correspondence Analysis clearly indicated that the elevation and lopping intensity have more impact on trees, while shrub and herbs were more influenced by elevation, canopy cover, light attenuation and soil erosion. Pinus roxburghii was the only species which was affected by heavy litter removal and forest fire.

Statistical RBF Network with Applications to an Expert System for Characterizing Diabetes Mellitus

Om, Kyong-Sik,Kim, Hee-Chan,Min, Byoung-Goo,Shin, Chan-So,Lee, Hong-Kyu The Korean Institute of Electrical Engineers 1998 Journal of Electrical Engineering and Information Vol.3 No.3

The purposes of this study are to propose a network for the characterizing of the input data and to show how to design predictive neural net재가 expert system which doesn't need previous knowledge base. We derived this network from the radial basis function networks(RBFN), and named it as a statistical EBFN. The proposed network can replace the statistical methods for analyzing dynamic relations between target disease and other parameters in medical studies. We compared statistical RBFN with the probabilistic neural network(PNN) and fuzzy logic(FL). And we testified our method in the diabetes prediction and compared our method with the well-known multilayer perceptron(MLP) neural network one, and showed good performance of our network. At last, we developed the diabetes prediction expert system based on the proposed statistical RBFN without previous knowledge base. Not only the applicability of the characterizing of parameters related to diabetes and construction of the diabetes prediction expert system but also wide applicabilities has the proposed statistical RBFN to other similar problems.

Regeneration dynamics, population structure, and forest composition in some ridge forests of the Western Himalaya, India

Om Prakash Tiwari,Yashwant Singh Rana,Ram Krishan,Chandra Mohan Sharma,Bhupendra Singh Bhandari 한국산림과학회 2018 Forest Science And Technology Vol.14 No.2

The present study aimed to analyze the regeneration dynamics, population structure, and forest composition in some ridge forests of the Western Himalaya to elucidate the impact of climate change. The highest species richness (trees, 17; saplings, 16; seedlings, 16) was recorded in mixed Rhododendron arboreum forest. The maximum tree density (737 § 25.93 trees ha¡1; mixed Quercus floribunda); sapling density (5342 § 587.54 saplings ha¡1; mixed Quercus semecarpifolia), and seedling density (71,429 § 26,632.29 seedlings ha¡1; mixed Cedrus deodara) were recorded in forests of higher altitudes. The mean basal cover values in these forests oscillated between 39.21 § 1.53 m2 ha¡1 (mixed Quercus leucotrichophora) to 87.65 § 15.45 m2 ha¡1 (mixed Abies pindrow). The highest Shannon index value (0.51 § 0.05) and species evenness (0.36 § 0.02) for trees were recorded in mixed Rhododendron arboreum forest. Some species like Betula utilis, Myrica esculenta, Ficus rumphii, Ilex dipyrena, Quercus floribunda, Litsea elongata, Symplocos paniculata, and Abies spectabilis were noticed as new recruiters (recent invaders) in new habitats, which may change the future forest composition. This study revealed that ridge forests of the Bhagirathi catchment area were in transition phase at middle altitudes. Mixed Quercus floribunda forest was observed to be the youngest regenerating forest; however, mixed Abies pindrow forest was the most mature old-growth forest.

Direct interspecies electron transfer for enhanced sulfide tolerance in an Up-flow anaerobic sludge blanket (UASB) reactor

( Om Prakash ),( Seongwon Im ),( Alsayed Mostafa ),( Chungman Moon ),( Dong-hoon Kim ) 한국폐기물자원순환학회 2021 젊은 연구자 학술연구발표회 Vol.18 No.0

Energy management in multi stage evaporator through a steady and dynamic state analysis

Om Prakash Verma,Gaurav Manik,Toufiq Haji Mohammed 한국화학공학회 2017 Korean Journal of Chemical Engineering Vol.34 No.10

Increasing energy demand, high cost of energy and global warming issues across the globe require energyintensive industries, such as paper mills to improve energy efficiency. Multi-stage evaporators used to concentrate the black liquor in such mills form its most energy consuming unit and require a strong understanding of steady and unsteady state behavior to ensure energy savings. The modeling of nonlinear heptads’ effect system yielded a set of complex nonlinear algebraic and differential equations that are analyzed using Interior-point method and state space representation. Dynamic response of product concentration and system vapor temperatures along with system stability and controllability have been explored by disturbing the flow rate, concentration and temperature of feed, and fresh steam flow rate. Simulations predict that steam flow rate, feed flow rate and its concentration invariably are major controlling factors (in decreasing order) of vapor temperature and product concentration. The interactive behavior between different effects translates into slower responses of the effects with increasing separation from disturbance source. This steady state and transient study opens many new explanations to this relatively less explored area and helps to propose and implement industrial PID controllers to reduce steam consumption and control product quality.

Chlorella vulgaris May Excrete Dioxin-like PCB-138, -153 via Urine of Rats

Om, Ae-Son,Shin, Hye-Seoung,Shim, Jae-Young,Han, Jae-Gab,Kim, Jae-Hyoun The Korean Society of Toxicogenomics and Toxicopro 2009 Molecular & cellular toxicology Vol.5 No.1

The effect of Chlorella vulgaris (CV) on the urinary excretion of di-ortho PCB congeners (PCB-138, -153) was investigated. Sprague-Dawley rats (6-weeks-old, n=10 rats/group) were randomly divided into one control (0CV) or 2% CV (2CV) or 5% CV (5CV) or 10% CV (10CV) groups, respectively. Composition of normal and chlorella meal-based diet were made up of 30% casein, 15% cornstarch, 50% sucrose, 5% cellulose, 5% coconut oil, 3.5% mineral mixture, 1 % vitamin mixture. All rats had free access to water and diet for 4 weeks. A significant increase in both PCB 138 and 153 in urinary level was detected in CV fed groups, 540% and 167% for 2CV, 155% and 89% for 5CV, 114% and 144% for 10CV group, respectively, when compared with their controls. These findings suggest that CV may have potential to eliminate body burden levels of dioxin-like PCB compounds.

औचित्य का कावत्व : स्वरूप, सन्दर्भ और समस्याएँ

????? ?????(Om Nath Bimali) 한국외국어대학교 인도연구소 2016 남아시아연구 Vol.21 No.3

Auchitya as the soul of poetry: it"s references and problems. The question as to what constitutes the idea of poetry evokes the emergence of certain notions in our mind. All those notions are somehow or the other related to poetry. The said notions can be seen as the poetical elements. Those notions play different rules and contribute something or the other, thus helping a certain linguistic expression received the persona of poetry. But among all those poetical elements what is that element whose presence enables a linguistic expression to be designated as poetry and whose absence debars it from being a case of poetry, irrespective of the presence of other poetic elements? What is the very essence of poetry? What is it to be a case of poetry? What is the soul of poetry? This has all along remained the most significant question in the history of literary criticism in India. A mere glance into the tradition would reveal the fact that the Indian savants of literary art, have delved very deep into these questions. In fact their engagement with this very question was so intensive, so expensive, so full and so fertile that this paved the way for emergence and development of Indian science of literary criticism. One of the six schools fundamentally differed from others when it comes to the idea of the soul of the overall phenomenon called ‘Poetry’. Unlike other schools, the present school did not see a particular, traditionally perceptible poetic element constituting the idea of poetry. Rather, the appropriate synthesis of all poetic elements on the part of the poet constitutes the idea of Poetry. This theory is known as the theory of “Auchitya” and its propounder was a 10<SUP>th</SUP> or 11<SUP>th</SUP> Century critique ‘Kshemendra’. This article aims at critically examine the theory, its historicity and the problems it brings. This paper also sums up the modern contributions on this poetic notion.

Key management for blockchain technology

Om Pal,Bashir Alam,Vinay Thakur,Surendra Singh 한국통신학회 2021 ICT Express Vol.7 No.1

Public Key Infrastructure (PKI) is used in Blockchain Technology to authenticate the entities and to ensure the integrity of the blockchain. Proper Protection of Bitcoin wallet is required for private keys, seeds and keys stored in external hardware in Blockchain infrastructure. In this paper, overview of Blockchain, analysis of existing PKI for Blockchain and key management for Blockchain wallet are discussed. To achieve the confidentiality of sensitive records over the Blockchain network, a Group Key Management scheme for secure group communication is also proposed.

Sulfide tolerance enhancement using direct interspecies electron transfer in an electrical energy prompted Up-flow anaerobic sludge blanket (UASB) reactor

( Om Prakash ),( Seongwon Im ),( Alsayed Mostafa ),( Chungman Moon ),( Dong Hoon Kim ) 한국폐기물자원순환학회(구 한국폐기물학회) 2021 한국폐기물자원순환학회 춘계학술발표논문집 Vol.2021 No.-

The treatment of sulfate rich wastewater leads to the failure of anaerobic digestion process due to high sulfide generation. Sulfide toxicity for the anaerobic digestion process is one the major concern that needs to overcome in order to recover the methanogenic potential of the sulfate-rich wastewater. In the present study, we tried to enhance the sulfide tolerance by promoting direct interspecies electron transfer (DIET) via electrical energy input (EEI). Two different operational conditions have been set to study the effect of sulfide on methanogenic process using up-flow anaerobic sludge blanket (UASB) reactor, comprising one control and one EEI reactor with an applied voltage of 0.6 V. The operation was continued for 194 days under different COD/SO₄ ^2- ratios. The EEI reactor exhibited maximum performance of 2.3 L CH₄/L/d at the COD/SO₄ ^2- of 5 which is 15 % higher than the control. The free sulfide concentration were 251 and 283 mg S^2-/L in control and EEI reactors, exceeding the inhibition threshold (50-200 mg S^2-/L). Only EEI reactor could keep its advanced performance, by acquiring 12 and 15% higher sulfate removal and CH₄ productivity respectively than control reactor. Form this study, it can be claimed that DIET stimulation has potential for enriching efficient sulfate-metabolizing microbes. Furthermore, microbiological studies can enhance the depth of the mechanism and unearthed the reason behind the sulfide tolerance system supported by DIET promoting reactor.