Performance advances in ion mobility spectrometry through combination with high speed vapor sampling, preconcentration and separation trchniques

Jeck P. Dworzanski,Man-Goo, Kim,A. Peter Snyder,Neil S. Arnold,Henk L.C. Meuzelaar 江原大學校 附設 環境硏究所 1994 環境硏究 Vol.11 No.-

Rugged, low weight, hand-held ion mobility spectrometry devices, initially developed far chemical warfare detection purposes, possess attractive characteristics as field-portable instruments for paramilitary (treaty verification, chemical demilitarization, drug interdiction, counterterrorism operations) and civilian (environmental monitoring, forensic characterization, process control) applications. Generally, However, such devices tend to exhibit limited resolution, narrow dynamic range, nonlinear response and long clearance times which severely limit their usefulness for qualitative and quantitative analysis of mixtures. To overcome these restrictions a prototype combined gas chromatography-ion mobility spectrometry (GC-IMS) unit was constructed by replacing the membrane inlet of a military IMS device known as the CAM (chemical agent monitor) with suitable front-end modules. These modules enable high speed automated vapor sampling (AVS), microvolume preconcentration/thermal desorption, and isothermal GC preseparation of analytes using a short capillary column while operating the BMS source and cell at subambient pressures as low as 0.5 atm. The AVS-GC-lMS methodology sharply reduces competitive ionization and facilitates identification of mixture components, thereby enabling quantitation of volatile and semivolatile com-pounds over a broad range of concentrations in air, At higher concentration levels (c.g. > 1 ppm) using the AVS inlet in automatic attenuation control (AAC) mode maintains excellent linear response. At ultralow concentration levels, e.g. < 10 ppb, a microvolume, trap-and-desorb type preconcentration module, maintains adequate signal to noise levels, thereby expanding the effective dynamic range of the method to approπ. 6 orders of magnitude (100 ppt-100 ppm). The resulting "hyphenated" GC-IMS technique has the potential of evolving into the first hand-portable, combined chromatography-spectroscopy instruments for field screening applications.

Exploring spatial patterns of trends in monthly rainfall and temperature in the Philippines based on Climate Research Unit grid

Arnold R. Salvacion,Damasa B. Magcale-Macandog,Pompe C. Sta. Cruz,Ronaldo B. Saludes,Ireneo B. Pangga,Christian Joseph R. Cumagun 대한공간정보학회 2018 Spatial Information Research Vol.26 No.5

This study assessed spatial pattern of trends in monthly rainfall and temperature in the Philippines using Climate Research Unit time series data. Based on the results, there are significant trends in monthly rainfall and temperature in the country. On the average, monthly rainfall in the country is increasing by 0.34 mm/year. In the case of monthly temperature, the average increases per year were 0.008 and 0.019 C, for maximum and minimum temperature, respectively. In terms of proportion, larger portion of the country showed significant trends in monthly temperature ([80%) compared to rainfall (\10%). Shift in wettest, driest, warmest, and coldest months were also observed between the periods of 1951–1980 to 1986–2015.

Banana suitability and Fusarium wilt distribution in the Philippines under climate change

Arnold R. Salvacion,Christian Joseph R. Cumagun,Ireneo B. Pangga,Damasa B. Magcale-Macandog,Pompe C. Sta. Cruz,Ronaldo B. Saludes,Tamie C. Solpot,Edna A. Aguilar 대한공간정보학회 2019 Spatial Information Research Vol.27 No.3

Climate change is expected to affect crop production directly and indirectly due to changes in crop suitability, decrease in productivity, and higher incidence of pest and diseases. In the case of banana, change in suitability and distribution of Fusarium wilt due to climate change can pose a major threat on its production system. Being a major dollar earner for the Philippines, these threats can greatly affect the country’s economic and food production system. This study assessed banana suitability and the potential distribution of Fusarium wilt in the Philippines under current and future climate condition using fuzzy logic and maximum entropy approach. Based on the results, climate change might have limited impact on banana suitability in the country. But the projected changes in rainfall in the future can increase the areas that are favorable for Fusarium wilt occurrence. From 21% under baseline climate condition, favorable areas for Fusarium wilt in the Philippines is estimated to increase to 27% covering 91.2% and 28.5% of the country’s highly and moderately suitable areas for banana, respectively. Such coverage accounts for approximately 67% of the country’s total harvested area for banana.

ACADEMIC INFORMATION MANAGEMENT SYSTEM FOR L’ATRA MONTESSORI SCHOOL

Arnold C. Gundran,Jay Ar B. Garcia 대한전자공학회 2010 ICEIC:International Conference on Electronics, Inf Vol.1 No.1

Academic Information Management System (AIMS) for L’atra Montessori School (LMSI) is a school management solution which is highly adaptable for Schools, Institute of Higher Learning and Training Academics. AIMS is built on today’s leading edge internet technology. It is a comprehensive, easily implemented and user friendly. It is the answer that understands the challenges and are focused on delivering effective, high?quality Information System that allow you to creates the right balance of process efficiency and learning excellence. Attaining a higher pass rate of students is consequential for any institutions, this puts pressure on the lecturer to review teaching methodologies and devoting time to students. Information should be readily available for teachers, parents, students and school administration. Administrative duties should be automated and minimized, allowing all parties room to excel. AIMS offers the robust functionality needed to automate the entire academic processes from class scheduling, student enrolment, and class registration including financial aid information such as billing. AIMS provides a centralized data warehouse that gives you a single source of information to make well-informed financial and operational decisions in real time.

Peramivir-Potential Anti-viral Therapy for Influenza Infections Including Pandemic Flu

( C. S Arnold ),( S. Bantia ),( J. M. Kilpatrick ),( R. Sidwell ),( C. D. Parker ),( R. Upshaw ),( Y. S. Babu ) 대한인수공통전염병학회 2006 창립총회 및 학술대회 초록집 Vol.2006 No.1

켬퓨터를 이용한 화학

Wahl, Arnold C. 이화여자대학교 사범대학 과학교육과 1970 과학교육 Vol.6 No.-

전통적으로 화학은 실험중심의 학문이였다. 다시 말하면 전통 화학은 대개가 한 물질에서 다른 물질로 변환하는 화학반응에서 그 물질의 성질을 측정하고 분석하는 것이다. 화학부분에서의 근대 양자론의 지대한 공헌은 화학용어를 풍요하게 해주었고 화학적인 현상의 기초를 이루는 원자나 분자들이 얼마나 중요한가를 설명해 주었고 도 강조를 해준 것이다. 실험하지 않고도 화학실험의 거시적인 결과를 산출해 내기 위한 수단으로 이용되는 원리를 즉 기초적인 정전기법칙, 고전물리학, 양자역학, 통계역학 등으로 원자나 분자들간의 인력을 나타내며 원자나 분자구조의 이론적인 모형을 낼수 있다.

The Role of Increasing Detection in the Rising Incidence of Prostate Cancer

Potosky, Arnold L.,Miller, Barry A.,Albertsen, Peter C.,Kramer, Barnelt S. MediMedia Korea 1995 JAMA-Korea Vol.10 No.6

Real-time Vehicle Classification on Phnom Penh Road in Video Surveillance

Beanbonyka Rim,Sovila Srun,Arnold Williem,Brian C. Lovell 대한전자공학회 2017 대한전자공학회 학술대회 Vol.2017 No.1

In this work we tackle traffic analysis problems for Phnom Penh roads. Unlike in most developed countries such as Australia and USA, the traffic conditions in developing countries such as Cambodia pose unique challenges. For instance, motorcycles are popular vehicles. This means, during peak hours, where the traffic for cars is congested, the traffic for motorcycles could still be flowing. Thus, any approaches using the whole video to determine the traffic condition are not suitable. To that end, this work provides the first stepping-stone by addressing the Phnom Penh vehicle classification problem. We propose a novel dataset capturing CCTV of Phnom Penh roads in 5 locations from 7am until 5pm on five sunny days. Then, we perform the study by proposing a baseline method comprising three steps: (1) background subtraction; (2) bag-of-word histogram feature extraction; and (3) classification using Support Vector Machine (SVM). Evaluation results show promising results with accuracy 0.76, 0.63 and 0.40 for light, medium and heavy traffic.

Nutritional Studies on Production of Antibacterial Activity by the Zebra Mussel Antagonist, Pseudomonas fluorescens CL0145A

( Polanski Cordovano ),( Grace Lea Romano ),( Lauren L C Marotta ),( Serena Jacob ),( Jennifer Soo Hoo ),( Elena Tartaglia ),( Deepa Asokan ),( Simkie Kar ),( Arnold L Demain ) 한국미생물 · 생명공학회 2013 Journal of microbiology and biotechnology Vol.23 No.5

Pseudomonas fluorescens strain CL0145A was discovered at the New York State Museum Field Research Laboratory as an effective agent against the environmentally destructive zebra mussel, which has contaminated US waters. Dried cells of the microbe are being commercialized as an environmentally friendly solution to the problem. We found that antibiotic activity against the Gram-positive bacterium Bacillus subtilis is produced and excreted by this strain. We have carried out studies to optimize production of the antibiotic. Studies were begun in a complex corn meal medium. Activity was found in both cells and culture supernates and was maximal after one day of fermentation. Static fermentation conditions were found to be superior to shaken culture. Production of extracellular antibiotic in complex medium was found to be dependent on the content of sucrose and enzymehydrolyzed casein. Indeed, production was greater in sucrose plus enzyme-hydrolyzed casein than in the complex medium. Of a large number of carbon sources studied as improvements over sucrose, the best was glycerol. An examination of nitrogen sources showed that production was improved by replacement of enzymehydrolyzed casein with soy hydrolysates. Production in the simple glycerol-Hy-Soy medium was not improved by addition of an inorganic salt mixture or by complex nitrogen sources, with the exception of malt extract. In an attempt to keep the medium more defined, we studied the effect of amino acids and vitamins as replacements for malt extract. Of 21 amino acids and 7 vitamins, we found tryptophan, glutamine, biotin, and riboflavin to be stimulatory. The final medium contained glycerol, Hy- Soy, tryptophan, glutamine, biotin, and riboflavin.

Quantitative Skeletal Muscle MRI: Part 1, Derived T2 Fat Map in Differentiation Between Boys With Duchenne Muscular Dystrophy and Healthy Boys.

Johnston, Jennifer H,Kim, Hee Kyung,Merrow, Arnold C,Laor, Tal,Serai, Suraj,Horn, Paul S,Kim, Dong Hoon,Wong, Brenda L American Roentgen Ray Society, etc.] 2015 American Journal of Roentgenology Vol.205 No.2

<P>OBJECTIVE. The purpose of this study was to validate derived T2 maps as an objective measure of muscular fat for discrimination between boys with Duchenne muscular dystrophy (DMD) and healthy boys. SUBJECTS AND METHODS. Forty-two boys with DMD (mean age, 9.9 years) and 31 healthy boys (mean age, 11.4 years) were included in the study. Age, body mass index, and clinical function scale grade were evaluated. T1-weighted MR images and T2 maps with and without fat suppression were obtained. Fatty infiltration was graded 0-4 on T1-weighted images, and derived T2 fat values (difference between mean T2 values from T2 maps with and without fat suppression) of the gluteus maximus and vastus lateralis muscles were calculated. Group comparisons were performed. The upper limit of the 95% reference interval of T2 fat values from the control group was applied. RESULTS. There was no significant difference in age or body mass index between groups. All healthy boys and 19 boys (45.2%) with DMD had a normal clinical function scale grade. Grade 1 fatty infiltration was seen in 90.3% (gluteus maximus) and 71.0% (vastus lateralis) of healthy boys versus 33.3% (gluteus maximus) and 52.4% (vastus lateralis) of boys with DMD. T2 fat values of boys with DMD were significantly longer than in the control group (p < 0.001). Using a 95% reference interval for healthy boys for the gluteus maximus (28.3 milliseconds) allowed complete separation from boys with DMD (100% sensitivity, 100% specificity), whereas the values for the vastus lateralis (7.28 milliseconds) resulted in 83.3% sensitivity and 100% specificity. CONCLUSION. Measurement of muscular fat with T2 maps is accurate for differentiating boys with DMD from healthy boys.</P>