Physical Sciences and Mathematics Commons^™

Application Of Colloidal Unimolecular Polymer (Cup) Particles In Coatings, Sagar Vijay Gade

Doctoral Dissertations

"Colloidal unimolecular polymer (CUP) particles were prepared by the process of water reduction on copolymers containing hydrophobic and hydrophilic monomers at definite ratio using free radical polymerization. The CUPs are formed by the effect of hydrophilic /hydrophobic interactions of the polymer with a change in the solvent environment around them. Once formed these colloidal particles are thermodynamically stable with collapsed hydrophobic groups forming a spheroidal core and hydrophilic charges on the surface stabilizing the particle by the charge repulsion. CUPs contain only the charged CUP particles, water and counterions with all the functionality on the surface for further chemistry. CUP …

Quantification Of Information Flow In Cyber Physical Systems, Li Feng

Doctoral Dissertations

"In Cyber Physical Systems (CPSs), traditional security mechanisms such as cryptography and access control are not enough to ensure the security of the system since complex interactions between the cyber portion and physical portion happen frequently. In particular, the physical infrastructure is inherently observable; aggregated physical observations can lead to unintended cyber information leakage. Information flow analysis, which aims to control the way information flows among different entities, is better suited for CPSs than the access control security mechanism. However, quantifying information leakage in CPSs can be challenging due to the flow of implicit information between the cyber portion, the …

Approximation Methods In Relativistic Eigenvalue Perturbation Theory, Jonathan Howard Noble

Doctoral Dissertations

"In this dissertation, three questions, concerning approximation methods for the eigenvalues of quantum mechanical systems, are investigated: (i) What is a pseudo-Hermitian Hamiltonian, and how can its eigenvalues be approximated via numerical calculations? This is a fairly broad topic, and the scope of the investigation is narrowed by focusing on a subgroup of pseudo-Hermitian operators, namely, PT-symmetric operators. Within a numerical approach, one projects a PT-symmetric Hamiltonian onto an appropriate basis, and uses a straightforward two-step algorithm to diagonalize the resulting matrix, leading to numerically approximated eigenvalues. (ii) Within an analytic ansatz, how can a relativistic Dirac Hamiltonian be …

Effects Of N-Acetylcysteine Amide In Preventing/Treating Cataracts, Sri Krishna Yasaswi Maddirala

Doctoral Dissertations

"Cataract, the opacification of an eye lens, is a common pathological abnormality of the lens accounting for approximately 50% of all blindness. The only effective treatment currently available for a cataract is the surgical removal of the affected lens and replacement with an artificial lens for the restoration of vision. Although, cataract surgery is considered to be a very successful procedure in terms of visual outcome, the cost of surgery, need for trained personnel and surgeons, and postsurgical complications, limit the worldwide availability and accessibility of this procedure. Hence, alternative preventive and treatment procedures are worthy of investigation. The lens …

Analytical And Numerical Studies Of Photo-Injected Charge Transport In Molecularly-Doped Polymers, Amrita Roy Chowdhury

Doctoral Dissertations

"The mobility of photo-injected charge carriers in molecularly-doped polymers (MDPs) exhibits a commonly observed, and nearly universal Poole-Frenkel field dependence, µ ~ exp [square root (ß₀E)], that has been shown to arise from the correlated Gaussian energy distribution of transport sites encountered by charges undergoing hopping transport through the material. Analytical and numerical studies of photo-injected charge transport in these materials are presented here with an attempt to understand how specific features of the various models developed to describe these systems depend on the microscopic parameters that define them. Specifically, previously published time-of-flight mobility data for the molecularly …

Distributed State Verification In The Smart Grid Using Physical Attestation, Thomas Patrick Roth

Doctoral Dissertations

"A cyber process in a distributed system can fabricate its internal state in its communications with its peers. These state fabrications can cause other processes in the distributed system to make incorrect control decisions. Cyber-physical systems have a unique advantage in the detection of falsified states because processes typically have observable effects on a shared physical infrastructure. This physical infrastructure acts as a high-integrity message channel that broadcasts changes in individual process states. The objective of this research is to demonstrate that there are cases where physical feedback from the shared infrastructure can be used to detect state fabrications. To …

Essays On Unit Root Testing In Time Series, Xiao Zhong

Doctoral Dissertations

"Unit root tests are frequently employed by applied time series analysts to determine if the underlying model that generates an empirical process has a component that can be well-described by a random walk. More specifically, when the time series can be modeled using an autoregressive moving average (ARMA) process, such tests aim to determine if the autoregressive (AR) polynomial has one or more unit roots. The effect of economic shocks do not diminish with time when there is one or more unit roots in the AR polynomial, whereas the contribution of shocks decay geometrically when all the roots are outside …

Aligning Public Participation To Stakeholders’ Sustainability Literacy—A Case Study On Sustainable Urban Development In Phoenix, Arizona, Matthew Cohen, Arnim Wiek, Braden Kay, John Harlow

Earth and Environmental Sciences Publications

In public planning processes for sustainable urban development, planners and experts often face the challenge of engaging a public that is not familiar with sustainability principles or does not subscribe to sustainability values. Although there are calls to build the public’s sustainability literacy through social learning, such efforts require sufficient time and other resources that are not always available. Alternatively, public participation processes may be realigned with the sustainability literacy the participants possess, and their capacity can modestly be built during the engagement. Asking what tools might successfully align public participation with participants’ sustainability literacy, this article describes and evaluates …

The Role Of Hydroxyl Channel In Defining Selected Physicochemical Peculiarities Exhibited By Hydroxyapatite, Vuk Uskoković

Pharmacy Faculty Articles and Research

Mysteries surrounding the most important mineral for the vertebrate biology, hydroxyapatite, are many. Perhaps the Greek root of its name, απαταo, meaning ‘to deceive’ and given to its mineral form by the early gem collectors who confused it with more precious stones, is still applicable today, though in a different connotation, descriptive of a number of physicochemical peculiarities exhibited by it. Comparable to water as the epitome of peculiarities in the realm of liquids, hydroxyapatite can serve as a paradigm for peculiarities in the world of solids. Ten of the peculiar properties of hydroxyapatite are sketched in this review piece, …

Instrument For Precision Long-Term Ss-Decay Rate Measurements, M. J. Ware, Scott D. Bergeson, J. E. Ellsworth, M. Groesbeck, J. E. Hansen, D. Pace, J. Peatross

Faculty Publications

We describe an experimental setup for making precision measurements of relative ß-decay rates of ²²Na, ³⁶Cl, ⁵⁴Mn, ⁶⁰Co, ⁹⁰Sr, ¹³³Ba, ¹³⁷Cs, ¹⁵²Eu, and ¹⁵⁴Eu. The radioactive samples are mounted in two automated sample changers that sequentially position the samples with high spatial precision in front of sets of detectors. The set of detectors for one sample changer consists of four Geiger-Müller (GM) tubes and the other set of detectors consists of two NaI scintillators. The statistical uncertainty in the count rate is few times 0.01% per day for the GM …

Preface To "Intertwingled: The Work And Influence Of Ted Nelson", Douglas R. Dechow, Daniele C. Struppa

Mathematics, Physics, and Computer Science Faculty Books and Book Chapters

This is the preface to "Intertwingled: The Work and Influence of Ted Nelson", which examines and honors the work and influence of the computer visionary and re-imagines its meaning for the future. Emerging from a conference held in 2014 at Chapman University, it includes contributions from world-renowned computer scientists and media figures.

The full text of this book is available on an open access basis at Springer.

The blog for the Intertwingled Conference can be read here.

Study Of Aerosols’ Characteristics And Dynamics Over The Kingdom Of Saudi Arabia Using A Multisensor Approach Combined With Ground Observations, Ashraf Farahat, Hesham El-Askary, Abdulaziz Al-Shaibani

Biology, Chemistry, and Environmental Sciences Faculty Articles and Research

This study covers various aspects of the aerosol distribution and characteristics, namely, optical depth climatology, absorption characteristics, and their microphysical properties over four regions in Saudi Arabia using satellite and ground observations including MODIS/Terra and Aqua, OMI, MISR/Terra, AERONET, and CALIPSO for the period April 2003–January 2013. The study includes cities in the North Western, Western, Eastern provinces of Saudi Arabia and in the Rub al Khali desert or Empty Quarter. Satellite and ground observations showed that the dust season extends from April to August with prominent peaks yet with high anthropogenic contribution late summer and early fall. Analysis shows …

Studying Air Pollutants Origin And Associated Meteorological Parameters Over Seoul From 2000 To 2009, Sunmin Park, Hesham El-Askary, Ismail Sabbah, Hanbin Kwak, Anup K. Prasad, Woo-Kyun Lee, Menas Kafatos

Biology, Chemistry, and Environmental Sciences Faculty Articles and Research

We investigate the temporal characteristics of major air pollutants collected from 44 air quality stations over the city of Seoul, Korea, namely, nitrogen dioxide, carbon monoxide, particular matter at 10 microns, and sulfur dioxide (SO2) between 2000 and 2009. The corresponding satellite datasets, namely, aerosol optical depth (AOD_sat), Ångström exponent, and fine mode fraction, collected from moderate resolution imaging spectroradiometer (MODIS) as well as the Aeronet ground aerosol optical depth (AOD_aeronet), have been analyzed. Pollutants’ seasonal effect has been inferred from the precipitation and temperature. The four pollutants under study show varying temporal characteristics with different …

Spatial Analyses On Seismo-Ionospheric Precursors Observed By Gim Tec And Demeter During The 2008 M8.0wenchuan Earthquake, Jann-Yenq Liu, Yuh-Ing Chen, Cheng-Chi Huang, Michel Parrot, Sergey Pulintets, Dimitar Ouzounov

Mathematics, Physics, and Computer Science Faculty Articles and Research

An abstract of the "Spatial analyses on seismo-ionospheric precursors observed by GIM TEC and DEMETER during the 2008 M8.0Wenchuan earthquake" paper presented at EGU General Assembly in 2015.

Remote Sensing And Modeling Of Atmospheric Dust And Studying Its Impact On Environment, Weather, And Climate, Hesham El-Askary, Seon K. Park, Slobodan Nickovic, Mian Chin

Mathematics, Physics, and Computer Science Faculty Articles and Research

An overview of the 2015 volume of Advances in Meteorology, which was co-edited by Chapman faculty member Dr. Hesham El-Askary.

On The Detection And Monitoring Of The Transport Of An Asian Dust Storm Using Multi-Sensor Satellite Remote Sensing, Hesham El-Askary, S. K. Park, M. H. Ahn, A. Prasad, Menas Kafatos

Mathematics, Physics, and Computer Science Faculty Articles and Research

Dynamical and physical features of a long range transported dust event originating in China affecting Korea early March 2008 are examined using an integrative multi-sensor and multi-algorithm approach. Aerosol loadings and their size mode were analyzed over both ocean and land surfaces using the Moderate Resolution Imaging Spectroradiometer (MODIS) aerosol optical depth (AOD), employing standard dark target (DT) and deep blue (DB) algorithms, and the Ångström exponent (AE). Anthropogenic absorbing aerosols and smoke were found to be significant over the Indochina Peninsula, the Philippines and southern China, while a mixture of dust and pollution were predominant over central to northern …

Fundamental Mathematics Of Consciousness, Menas Kafatos

Mathematics, Physics, and Computer Science Faculty Articles and Research

We explore a mathematical formalism that ties together the observer with the observed in the view that Consciousness is primary, operating through three principles which apply at all levels, the essence of qualia of experience. The formalism is a simplified version of Hilbert space mathematics encountered in quantum mechanics. It does, however, go beyond specific interpretations of quantum mechanics and has strong philosophical foundations in Western philosophy as well as monistic systems of the East. The implications are explored and steps for the full development of this axiomatic mathematical approach to Consciousness are discussed.

Weak Values Obtained In Matter-Wave Interferometry, Stephan Sponar, Tobias Denkmayr, Hermann Geppert, Hartmutt Lemmel, Alexandre Matzkin, Jeff Tollaksen, Yuji Hasegawa

Mathematics, Physics, and Computer Science Faculty Articles and Research

Weak values, introduced more than 25 years ago, underwent a metamorphosis from a theoretical curiosity to a powerful resource in photonics for exploring foundations of quantum mechanics, as well as a practical laboratory tool. Due to the tiny coherence volume of particles used in matter-wave optics, a straightforward implementation of weak measurements is not feasible. We have overcome this hurdle by developing a method to weakly measure a massive particle's spin component. A neutron optical approach is realized by utilizing neutron interferometry, where the neutron's spin is coupled weakly to its spatial degree of freedom. Here, we present how one …

Detection And Tracking Of T Cells In Time-Lapse Imaging, Cody Arbuckle, Milton L. Greenberg, Erik J. Linstead

Mathematics, Physics, and Computer Science Faculty Articles and Research

The effective classification and tracking of cells obtained from modern staining techniques has significant limitations due to the necessity of having to train and utilize a human expert in the field who must manually identify each cell in each slide. Often times these slides are filled with noise cells that are not of particular interest to the researcher. The use of computational methods has the ability to effectively and efficiently enhance image quality, as well as identify and track target cell types over large data sets. Here we present a computational approach to the in vitro tracking of T cells …

An Extension Of Herglotz's Theorem To The Quaternions, Daniel Alpay, Fabrizio Colombo, David P. Kimsey, Irene Sabadini, David P. Kimsey

Mathematics, Physics, and Computer Science Faculty Articles and Research

A classical theorem of Herglotz states that a function n↦r(n) from Z into Cs×s is positive definite if and only there exists a Cs×s-valued positive measure dμ on [0,2π] such that r(n)=∫2π0eintdμ(t)for n∈Z. We prove a quaternionic analogue of this result when the function is allowed to have a number of negative squares. A key tool in the argument is the theory of slice hyperholomorphic functions, and the representation of such functions which have a positive real part in the unit ball of the quaternions. We study in great detail the case of positive definite functions.

Boundary Interpolation For Slice Hyperholomorphic Schur Functions, Khaled Abu-Ghanem, Daniel Alpay, Fabrizio Colombo, David P. Kimsey, Irene Sabadini

Mathematics, Physics, and Computer Science Faculty Articles and Research

A boundary Nevanlinna-Pick interpolation problem is posed and solved in the quaternionic setting. Given nonnegative real numbers κ1,…,κN, quaternions p1,…,pN all of modulus 1, so that the 2-spheres determined by each point do not intersect and pu≠1 for u=1,…,N, and quaternions s1,…,sN, we wish to find a slice hyperholomorphic Schur function s so that
limr→1r∈(0,1)s(rpu)=suforu=1,…,N,
and
limr→1r∈(0,1)1−s(rpu)su¯¯¯¯¯1−r≤κu,foru=1,…,N.
Our arguments relies on the theory of slice hyperholomorphic functions and reproducing kernel Hilbert spaces.

A New Resolvent Equation For The S-Functional Calculus, Daniel Alpay, Fabrizio Colombo, Jonathan Gantner, Irene Sabadini

Mathematics, Physics, and Computer Science Faculty Articles and Research

The S-functional calculus is a functional calculus for (n + 1)-tuples of non necessarily commuting operators that can be considered a higher dimensional version of the classical Riesz-Dunford functional calculus for a single operator. In this last calculus, the resolvent equation plays an important role in the proof of several results. Associated with the S-functional calculus there are two resolvent operators: the left S−1 L (s, T ) and the right one S−1 R (s, T ), where s = (s0, s1, . . . , sn) ∈ Rn+1 and T = (T0, T1, . . . , Tn) is …

Inner Product Spaces And Krein Spaces In The Quaternionic Setting, Daniel Alpay, Fabrizio Colombo, Irene Sabadini

Mathematics, Physics, and Computer Science Faculty Articles and Research

In this paper we provide a study of quaternionic inner product spaces. This includes ortho-complemented subspaces, fundamental decompositions as well as a number of results of topological nature. Our main purpose is to show that a closed uniformly positive subspace in a quaternionic Krein space is ortho-complemented, and this leads to our choice of the results presented in the paper.

Realizations Of Infinite Products, Ruelle Operators And Wavelet Filters, Daniel Alpay, Palle Jorgensen, Izchak Lewkowicz

Mathematics, Physics, and Computer Science Faculty Articles and Research

Using the system theory notion of state-space realization of matrix-valued rational functions, we describe the Ruelle operator associated with wavelet filters. The resulting realization of infinite products of rational functions have the following four features: 1) It is defined in an infinite-dimensional complex domain. 2) Starting with a realization of a single rational matrix-function M, we show that a resulting infinite product realization obtained from M takes the form of an (infinitedimensional) Toeplitz operator with the symbol that is a reflection of the initial realization for M. 3) Starting with a subclass of rational matrix functions, including scalar-valued ones corresponding …

On Algebras Which Are Inductive Limits Of Banach Spaces, Daniel Alpay, Guy Salomon

Mathematics, Physics, and Computer Science Faculty Articles and Research

We introduce algebras which are inductive limits of Banach spaces and carry inequalities which are counterparts of the inequality for the norm in a Banach algebra. We then define an associated Wiener algebra, and prove the corresponding version of the well-known Wiener theorem. Finally, we consider factorization theory in these algebra, and in particular, in the associated Wiener algebra.

Wiener-Chaos Approach To Optimal Prediction, Daniel Alpay, Alon Kipnis

Mathematics, Physics, and Computer Science Faculty Articles and Research

In this work we combine Wiener chaos expansion approach to study the dynamics of a stochastic system with the classical problem of the prediction of a Gaussian process based on part of its sample path. This is done by considering special bases for the Gaussian space G generated by the process, which allows us to obtain an orthogonal basis for the Fock space of G such that each basis element is either measurable or independent with respect to the given samples. This allows us to easily derive the chaos expansion of a random variable conditioned on part of the sample …

Implicit Measures And Online Risks, Lucinda W. Wang

CCAC Theses and Dissertations

Information systems researchers typically use self-report measures, such as questionnaires to study consumers’ online risk perception. The self-report approach captures the conscious perception of online risk but not the unconscious perception that precedes and dominates human being’s decision-making. A theoretical model in which implicit risk perception precedes explicit risk evaluation is proposed. The research model proposes that implicit risk affects both explicit risk and the attitude towards online purchase. In a direct path, the implicit risk affects attitude towards purchase. In an indirect path, the implicit risk affects explicit risk, which in turn affects attitude towards purchase.

The stimulus used …

Security Frameworks For Machine-To-Machine Devices And Networks, Michael Demblewski

CCAC Theses and Dissertations

Attacks against mobile systems have escalated over the past decade. There have been increases of fraud, platform attacks, and malware. The Internet of Things (IoT) offers a new attack vector for Cybercriminals. M2M contributes to the growing number of devices that use wireless systems for Internet connection. As new applications and platforms are created, old vulnerabilities are transferred to next-generation systems. There is a research gap that exists between the current approaches for security framework development and the understanding of how these new technologies are different and how they are similar. This gap exists because system designers, security architects, and …

การประเมินรอยเท้าคาร์บอนขององค์กรและศักยภาพในการลดก๊าซเรือนกระจก : กรณีศึกษาอุตสาหกรรมเม็ดพลาสติก, ชมพูนุท รุ่งทอง

Chulalongkorn University Theses and Dissertations (Chula ETD)

งานวิจัยนี้มีวัตถุประสงค์เพื่อประเมินการปล่อยก๊าซเรือนกระจกของอุตสาหกรรมที่ทำการผลิตเม็ดพลาสติกในประเทศไทย ทั้ง 7 ผลิตภัณฑ์ ได้แก่ พอลิเอทิลีนความหนาแน่นสูง (high density polyethylene : HDPE) พอลิเอทิลีนความหนาแน่นต่ำ (low density polyethylene : LDPE) พอลิเอทิลีนความหนาแน่นต่ำเชิงเส้น (linear low density polyethylene : LLDPE) พอลิไวนิลคลอไรด์ (polyvinyl chloride : PVC) พอลิพรอพิลีน (polypropylene : PP) พอลิสไตรีน (polystyrene : PS) และพอลิเอทิลีนเทเรฟทาเลต (polyethylene terephthalate : PET) โดยใช้ข้อมูลในปี พ.ศ. 2556 ในการคำนวณหาปริมาณก๊าซเรือนกระจกในรูปแบบรอยเท้าคาร์บอนขององค์กร และอ้างอิงวิธีการคำนวณตามวิธีมาตรฐานของ ISO14064-1:2006 และองค์การบริหารจัดการก๊าซเรือนกระจก (องค์การมหาชน) โดยพิจารณาการปล่อยก๊าซเรือนกระจกจากขอบเขตที่ 1 การปล่อยก๊าซเรือนกระจกทางตรง ประกอบไปด้วย การใช้สารทำความเย็น การใช้เชื้อเพลิงในกระบวนการผลิตและยานพาหนะ และการรั่วไหลจากการเผาทิ้ง และขอบเขตที่ 2 การใช้ไฟฟ้าและไอน้ำเท่านั้น เพื่อนำไปสู่การระบุแหล่งปล่อยก๊าซเรือนกระจกที่สำคัญพร้อมทั้งสามารถนำข้อมูลในงานวิจัยนี้มาเป็นส่วนหนึ่งของการศึกษาแนวทางการลดก๊าซเรือนกระจกของอุตสาหกรรมปิโตรเคมีขั้นปลายกลุ่มพลาสติกได้ จากการศึกษาพบว่า ทั้ง 7 ผลิตภัณฑ์ มีการปล่อยก๊าซเรือนกระจกจากการใช้ไฟฟ้าและไอน้ำมากที่สุดโดยอยู่ในช่วงร้อยละ 39-99 ของปริมาณการปล่อยทั้งหมด ความเข้มก๊าซเรือนกระจกอยู่ในช่วง 0.153-0.473 tonCO2eq./ton product โดย LDPE มีความเข้มก๊าซเรือนกระจกสูงที่สุด ซึ่งมีค่าเท่ากับ 0.473 tonCO2eq./ton product และความเข้มพลังงานอยู่ในช่วง 1.238-3.508 GJ/ton product จากผลการคาดการณ์ปริมาณการปล่อยก๊าซเรือนกระจกในปี ค.ศ. 2013 ถึง 2050 ในลักษณะการดำเนินการปกติ (Business as usual) โดยการปล่อยก๊าซเรือนกระจกในปี ค.ศ. 2020 2030 และ 2050 มีค่าเท่ากับ 2,117, …

การใช้แบคทีเรียบนใบพืชสำหรับกำจัดฟอร์มาลดีไฮด์, จิรารัตน์ พินทอง

Chulalongkorn University Theses and Dissertations (Chula ETD)

ฟอร์มาลดีไฮด์เป็นสารอินทรีย์ระเหยง่ายที่ส่งผลกระทบต่อสุขภาพของมนุษย์ ในปัจจุบันการบำบัดฟอร์มาลดีไฮด์ด้วยพืชกำลังได้รับความสนใจ เพราะเป็นมิตรต่อสิ่งแวดล้อม และราคาถูก โดยใบพืชเป็นแหล่งที่อยู่อาศัยของแบคทีเรียหลากหลายชนิด ดังนั้นในงานวิจัยนี้จึงสนใจศึกษาประสิทธิภาพของแบคทีเรียบนใบพืชในการกำจัดฟอร์มาลดีไฮด์ โดยศึกษาใบพืชทั้งพืชคลุมดิน และไม้พุ่ม จากบริเวณรอบคณะวิทยาศาสตร์ จุฬาลงกรณ์มหาวิทยาลัย พบว่าใบพลูด่างมีจำนวนแบคทีเรียทั้งหมด และแบคทีเรียที่ใช้ฟอร์มาลดีไฮด์เป็นแหล่งคาร์บอนมากที่สุดถึง 7.99±0.2 และ 6.37±0.23 Log CFU/กรัมใบไม้ ตามลำดับ พบว่า Microbacterium paroxydans JP13 มีประสิทธิภาพสูงที่สุดในการกำจัดฟอร์มาลดีไฮด์ นอกจากนั้นศึกษาประสิทธิภาพต้นพลูด่างและแบคทีเรียบนใบในการกำจัดฟอร์มาลดีไฮด์ในอากาศ ที่ความเข้มข้นเริ่มต้น 0.04 ppmV ในแบบจำลองตู้กระจกขนาด 40×40×60 ลูกบาศก์เซนติเมตร ทำการทดลอง 4 ชุดการทดลอง โดยทั้ง 4 ชุดการทดลองจะเปรียบเทียบกับชุดควบคุมซึ่งเป็นตู้กระจกที่ไม่มีพืช ดังนี้ 1) ต้นพลูด่างตามธรรมชาติ 2) ต้นพลูด่างที่ผ่านการฆ่าเชื้อแบคทีเรียที่ผิวใบ 3) ต้นพลูด่างที่พ่นสารอาหารที่ผิวใบ และ 4) ต้นพลูด่างที่พ่นด้วยแบคทีเรีย M. paroxydans JP13 พบว่าสามารถกำจัดฟอร์มาลดีไฮด์ได้ถึง 87%, 79%, 94% และ 100% ตามลำดับ เมื่อระยะเวลาผ่านไป 96 ชั่วโมง แสดงให้เห็นว่าต้นพลูด่างสามารถกำจัดฟอร์มาลดีไฮด์ด้วยกลไกการดูดซับของใบ เมตาบอลิซึมของใบ และการย่อยสลายฟอร์มาลดีไฮด์ของจุลินทรีย์บนใบ อย่างไรก็ดีการพ่นแบคทีเรียย่อยสลายฟอร์มาลดีไฮด์ชนิด M. paroxydans JP13 ลงบนใบพลูด่าง ทำให้มีการกำจัดฟอร์มาลดีไฮด์สูงกว่าในชุดการทดลองอื่นๆ การจัดจำแนกชนิดของแบคทีเรียที่คัดแยกจากใบต้นพลูด่างหลังการบำบัด พบว่าแบคทีเรียเด่นที่พบอยู่ในจีนัส Microbacterium แสดงให้เห็นว่า M. paroxydans JP13 ที่เติมบนใบสามารถเจริญเติบโตได้ งานวิจัยนี้จึงเป็นงานวิจัยที่พบว่าการเติมแบคทีเรียบนใบสามารถเสริมประสิทธิภาพของพืชในการกำจัดฟอร์มาลดีไฮด์ ความรู้ที่ได้รับสามารถนำไปประยุกต์ใช้งานในการกำจัดฟอร์มาลดีไฮด์ในอากาศต่อไป