gerardo janairo | De La Salle University (original) (raw)
Papers by gerardo janairo
Density functional theory (DFT)-based calculations are performed to determine the effects of prea... more Density functional theory (DFT)-based calculations are performed to determine the effects of preadsorbed atomic hydrogen (H) and substrate reconstruction on the absorption of H into bilayer graphene via the armchair edge. The total energy is calculated using the Vienna Ab-initio Simulation Package (VASP) software for various X-,Y-and Zpositions of H with respect to a predetermined reference point. The potential energy along Z (surface normal) is plotted as functions of the X-and Y-lateral positions of H. From these plots, the potential energy surface (PES) is obtained and the reaction path for the absorption of H into bilayer graphene via the armchair edge is determined. Results show that without surface reconstruction, absorption of H into the region between the graphene sheets is hindered by the preadsorbed H atoms since a barrier exists on the surface. By allowing surface reconstruction, this barrier is lowered thus enhancing H absorption into the bilayer.
Springer series in chemical physics, 2005
Solid-state phase transition onset in an endocrine-disrupting estrogen-like chemical (1,4-naphtho... more Solid-state phase transition onset in an endocrine-disrupting estrogen-like chemical (1,4-naphthol) is detected using terahertz transmission spectroscopy. Differential scanning microscopy and temperature-dependent X-ray diffraction analysis confirmed the occurrence of such phenomenon.
International Journal of Peptide Research and Therapeutics, Oct 28, 2020
Oligomerization plays a crucial role in the structure and function of peptides and proteins, wher... more Oligomerization plays a crucial role in the structure and function of peptides and proteins, wherein sequence variations can affect the oligomeric stability of the biomolecule. In this study, an artificial neural network classifier that can predict the oligomeric state of peptides is presented, using the p53 tetramerization domain and associated mutants as the model system. The FASGAI vectors were utilized as the peptide descriptors, and the resulting binary classifier exhibits satisfactory predictive ability as demonstrated by a test set accuracy of 86%.
ChemInform, Jun 16, 1987
Reactions of the epoxides (I) and (V) according to A) yield isomeric mixtures of the correspondin... more Reactions of the epoxides (I) and (V) according to A) yield isomeric mixtures of the corresponding unsilylated azidodeoxy sugars.
We investigate H absorption into bi-layer graphene via the armchair edge. DFT-based total-energy ... more We investigate H absorption into bi-layer graphene via the armchair edge. DFT-based total-energy calculations for H incident on pristine, rigid graphene show a reaction path with a strong H trap near the surface C atoms. In the subsurface, the negative, fluctuating potential energy indicates further H absorption becomes difficult without reconstruction. Interlayer hopping is unlikely for H stays near a graphene sheet during absorption while it may also move parallel to a C row. H desorption barriers between rows is always less than that to absorption. For subsequent H absorption on rigid H-terminated graphene edge, a large activation barrier is initially observed which is lowered by substrate atom reconstruction.
Tuberculosis, 2018
Isoniazid (INH) is known to cause the exclusive lethal action to Mycobacterium tuberculosis (M. t... more Isoniazid (INH) is known to cause the exclusive lethal action to Mycobacterium tuberculosis (M. tb.) cells because of the pathogen's own catalase peroxidase (katG) enzyme that converts INH to a very reactive radical. Thus, in order to gain insights on the interaction of INH with the individual active site residues (Res) of katG, this study presents a computational approach via molecular docking and density functional theory (DFT) using augmented models to study the individual INH-Res interactions. Seven amino acid residues directly interacts with INH: Arg104, Asp137, His108, Ile228, Trp107, Tyr229, and Val230. The residues with the highest interaction energies are Arg104 (-39.64 kcal/mol) and Asp137 (-32.85 kcal/mol) mainly due to strong iondipole and H-bonding interactions present in the complexes, while the weakest interaction was observed for Ile228 (-13.78 kcal/mol). Molecular electrostatic potential surface revealed complementary regions for dipole interactions and charge distribution analysis further shows that INH generally donates electrons to the residues. The results in this study agrees with the previous experimental findings and provides new insights into the catalase dependent activation of INH and the methods presented may be valuable in the study of biological metabolism of molecules.
ChemInform, 1988
The oxirane activated triflyl-β-L-ribopyranoside (I) reacts with amino acids or peptides protecte... more The oxirane activated triflyl-β-L-ribopyranoside (I) reacts with amino acids or peptides protected at the carboxylic end such as (IIa) or (IIb) to give the amino-α-D-lyxopyranosides (III). Acid-catalyzed epoxide opening of (IIIa) yields on simultaneous saponification the L-xylopyranoside (IV) as main product.
Journal of the Chemical Society, 1994
We studied the sorption mechanism of atomic hydrogen on the zigzag edge of pristine bilayer graph... more We studied the sorption mechanism of atomic hydrogen on the zigzag edge of pristine bilayer graphene (BLG) as groundwork effort in the realization of the material’s utilization as the substrate in a hydrogen storage system. Using density functional theory, we performed total energy calculations, using pseudopotentials obtained from projector augmented wave (PAW) method. The Kohn-Sham equations were solved using plane waves with kinetic energies of 400 eV. The surface Brillouin zone integration was performed using the special-point sampling technique of Monkhorst and Pack (with 4×4×1 sampling meshes). For the exchange correlation energy, we adopted the generalized gradient approximation (GGA) using the Perdew-Burke-Ernzerhof (PBE) functional. Each layer in the slab model we used in the calculations consisted of 28 sp2-bonded carbon atoms with in-plane carboncarbon distance of 1.42 Å and out-of-plane equilibrium stacking distance of 3.5 Å. Results revealed at least two non-activated r...
philsciletters.org
... Email Address: jose.isagani.janairo@dlsu.edu.ph gerardo.janairo@dlsu.edu.ph Submitted: Novemb... more ... Email Address: jose.isagani.janairo@dlsu.edu.ph gerardo.janairo@dlsu.edu.ph Submitted: November 24, 2011 Accepted: November 28, 2011 Published: January 13, 2012 Editor-in-charge: Eduardo A. Padlan Reviewer: Eduardo A. Padlan Page 2. ...
Scientia Agriculturae Bohemica, 2019
A support vector machine classification algorithm was formulated to differentiate rubber cup coag... more A support vector machine classification algorithm was formulated to differentiate rubber cup coagulum according to the type of acid coagulant used. Two classification models were established, a binary classification algorithm and a model that can identify if formic, acetic, sulfuric acid, or no acid was used to induce coagulation. The models were based on the properties of the rubber cup coagulum that are easy to measure, such as tensile strength, water contact angle, and density. The binary classification model, which differentiates the industry-accepted formic acid-coagulated rubber cup coagulum from those which are not, exhibited satisfactory reliability, as evidenced by a 92% overall prediction accuracy and 71.4% cross-validation accuracy. Moreover, it was also determined that the rubber properties density, and water contact angle were important contributors for the classification. Acid-induced rubber coagulation is an important post-harvest process that influences the resulting...
abstract: The DNA intercalating potential of the previously prepared water-soluble glycosylated t... more abstract: The DNA intercalating potential of the previously prepared water-soluble glycosylated tetrathiafulvene (TTF) and dithiolene derivatives was assessed through comparative docking analysis using doxorubicin as the reference molecule. Comparing the binding orientations and statistical evaluation of the ten lowest energy poses of each molecule with doxorubicin revealed that the glycosylated TTF derivatives are more likely to possess DNA intercalating activity since they posses lower energy values although adopted a different binding orientation. Results obtained will provide important preliminary insight on the possible biological applications of these glycoconjugates and may aid further development of these compounds for the intention of utilizing them as anti-tumor agents.
Quantitation of the total protein content in a sample is a critical step in protein analysis. Mol... more Quantitation of the total protein content in a sample is a critical step in protein analysis. Molecular UV-Vis absorption spectroscopy is very efficient in quantitative analysis such as protein quantitation and has extensive applications in chemical and clinical laboratories worldwide. Among the various techniques for protein assay, biuret test is of particular interest in this study. This study sought to verify the sensitivity of biuret assay to protein samples with concentrations ranging from 0.0100 to 5.00 mg/mL. Albumin chicken egg was used as the protein sample. The assay was assessed to determine the range of concentration in which it will show linearity. The biuret test exhibited linearity in a wide range of concentrations (0.1000 ± 0.0004 to 5.00 ± 0.02 mg/mL). The starting protein concentration range established for the calibration curve of this assay is lower than the found literature value (1 mg/sample). The study provides a more workable range of biuret test.
Scientists have not only helped us understand the universe but they have enormously contributed t... more Scientists have not only helped us understand the universe but they have enormously contributed to the betterment of human society. However when personal ambitions, politics and greed are intertwined with scientific altruism, the outcome could make a scientist either a hero or a villain. Although there are a number of great scientists who have had such colorful and intriguing scientific career, none could be as interesting and tragic as Fritz Haber. At the start of the twentieth century, the world was at the brink of global famine. A call was made to all scientists to find a solution. Fritz Haber was a German scientist who found the solution. His discovery saved the world but it was also used to kill millions of people in the last two world wars. This is the story of a genius who is today remembered for discoveries that influence the way we produce our food and how we wage war, contributions which continue to have a huge ecological impact worldwide.
SCIENDO, 2018
A support vector machine classification algorithm was formulated to differentiate rubber cup coag... more A support vector machine classification algorithm was formulated to differentiate rubber cup coagulum according to the type
of acid coagulant used. Two classification models were established, a binary classification algorithm and a model that can
identify if formic, acetic, sulfuric acid, or no acid was used to induce coagulation. The models were based on the properties of
the rubber cup coagulum that are easy to measure, such as tensile strength, water contact angle, and density. The binary classification
model, which differentiates the industry-accepted formic acid-coagulated rubber cup coagulum from those which are
not, exhibited satisfactory reliability, as evidenced by a 92% overall prediction accuracy and 71.4% cross-validation accuracy.
Moreover, it was also determined that the rubber properties density, and water contact angle were important contributors for
the classification. Acid-induced rubber coagulation is an important post-harvest process that influences the resulting rubber
quality. Thus, the accurate differentiation of the rubber samples is useful for quality assurance purposes, as well as in policy
enforcement.
Nova Biotechnologica et Chimica
The increasing prevalence of mosquito – borne diseases has prompted intensified efforts in the pr... more The increasing prevalence of mosquito – borne diseases has prompted intensified efforts in the prevention of being bitten by the vector. Among the various strategies of vector control, the application of repellents provides instant and effective protection from mosquitoes. However, emerging concerns regarding the safety of the widely used repellent, DEET, has led to initiatives to explore natural alternatives. In order to fully realize the potential of natural repellents, focusing on the discovery of natural compounds eliciting repellency is of paramount importance. In this paper, machine learning was utilized to establish association between the mosquito repellent activity of 33 natural compounds using 20 chemical descriptors. Individually, the descriptors had insignificant monotonic relationship with the response variable. But when optimized, the formulated model through boosted trees regression exhibited reliable predictive ability (r2 train = 0.93, r2 test = 0.66, r2 overall = 0...
Nova Biotechnologica et Chimica
The increasing prevalence of mosquito – borne diseases has prompted intensified efforts in the pr... more The increasing prevalence of mosquito – borne diseases has prompted intensified efforts in the prevention of being bitten by the vector. Among the various strategies of vector control, the application of repellents provides instant and effective protection from mosquitoes. However, emerging concerns regarding the safety of the widely used repellent, DEET, has led to initiatives to explore natural alternatives. In order to fully realize the potential of natural repellents, focusing on the discovery of natural compounds eliciting repellency is of paramount importance. In this paper, machine learning was utilized to establish association between the mosquito repellent activity of 33 natural compounds using 20 chemical descriptors. Individually, the descriptors had insignificant monotonic relationship with the response variable. But when optimized, the formulated model through boosted trees regression exhibited reliable predictive ability (r2 train = 0.93, r2 test = 0.66, r2 overall = 0...
Annals of Tropical Research
The amounts of P, K, Ca, Mg, Na, Fe, Zn, Mn, Cu, B, Pb, and Cd in both grits and hull/testa of Ad... more The amounts of P, K, Ca, Mg, Na, Fe, Zn, Mn, Cu, B, Pb, and Cd in both grits and hull/testa of Adlay (Coix lacryma-jobi L., Gulian variety) in Bukidnon, Philippines, were quantified relative to the pH, electrical conductivity (EC), cation-exchange capacity (CEC), and amounts of organic matter (OM), N, P, K, Ca, Mg, Na, Fe, Zn, Mn, Cu, B, Pb, and Cd of the soils where these plants were grown. The P, K, Ca, Fe, and Cu contents in grits were differentiated by P, CEC, Ca, Fe, and Zn of the soil, respectively. The accumulations of both Mg and Zn in grits were influenced only by the pH of the soil while the Mn contents in grits were influenced by both pH and Mn content of the soil. The Fe, Zn, and B contents of hull/testa were significantly differentiated by the Zn, Fe and OM of the soil, respectively. The mean amounts of macr-oelements in both grits and hull/testa were in the order of K>P>Mg>Ca. The mean micro-element contents in grits were in the order of Fe>Na>Mn>Zn&g...
Density functional theory (DFT)-based calculations are performed to determine the effects of prea... more Density functional theory (DFT)-based calculations are performed to determine the effects of preadsorbed atomic hydrogen (H) and substrate reconstruction on the absorption of H into bilayer graphene via the armchair edge. The total energy is calculated using the Vienna Ab-initio Simulation Package (VASP) software for various X-,Y-and Zpositions of H with respect to a predetermined reference point. The potential energy along Z (surface normal) is plotted as functions of the X-and Y-lateral positions of H. From these plots, the potential energy surface (PES) is obtained and the reaction path for the absorption of H into bilayer graphene via the armchair edge is determined. Results show that without surface reconstruction, absorption of H into the region between the graphene sheets is hindered by the preadsorbed H atoms since a barrier exists on the surface. By allowing surface reconstruction, this barrier is lowered thus enhancing H absorption into the bilayer.
Springer series in chemical physics, 2005
Solid-state phase transition onset in an endocrine-disrupting estrogen-like chemical (1,4-naphtho... more Solid-state phase transition onset in an endocrine-disrupting estrogen-like chemical (1,4-naphthol) is detected using terahertz transmission spectroscopy. Differential scanning microscopy and temperature-dependent X-ray diffraction analysis confirmed the occurrence of such phenomenon.
International Journal of Peptide Research and Therapeutics, Oct 28, 2020
Oligomerization plays a crucial role in the structure and function of peptides and proteins, wher... more Oligomerization plays a crucial role in the structure and function of peptides and proteins, wherein sequence variations can affect the oligomeric stability of the biomolecule. In this study, an artificial neural network classifier that can predict the oligomeric state of peptides is presented, using the p53 tetramerization domain and associated mutants as the model system. The FASGAI vectors were utilized as the peptide descriptors, and the resulting binary classifier exhibits satisfactory predictive ability as demonstrated by a test set accuracy of 86%.
ChemInform, Jun 16, 1987
Reactions of the epoxides (I) and (V) according to A) yield isomeric mixtures of the correspondin... more Reactions of the epoxides (I) and (V) according to A) yield isomeric mixtures of the corresponding unsilylated azidodeoxy sugars.
We investigate H absorption into bi-layer graphene via the armchair edge. DFT-based total-energy ... more We investigate H absorption into bi-layer graphene via the armchair edge. DFT-based total-energy calculations for H incident on pristine, rigid graphene show a reaction path with a strong H trap near the surface C atoms. In the subsurface, the negative, fluctuating potential energy indicates further H absorption becomes difficult without reconstruction. Interlayer hopping is unlikely for H stays near a graphene sheet during absorption while it may also move parallel to a C row. H desorption barriers between rows is always less than that to absorption. For subsequent H absorption on rigid H-terminated graphene edge, a large activation barrier is initially observed which is lowered by substrate atom reconstruction.
Tuberculosis, 2018
Isoniazid (INH) is known to cause the exclusive lethal action to Mycobacterium tuberculosis (M. t... more Isoniazid (INH) is known to cause the exclusive lethal action to Mycobacterium tuberculosis (M. tb.) cells because of the pathogen's own catalase peroxidase (katG) enzyme that converts INH to a very reactive radical. Thus, in order to gain insights on the interaction of INH with the individual active site residues (Res) of katG, this study presents a computational approach via molecular docking and density functional theory (DFT) using augmented models to study the individual INH-Res interactions. Seven amino acid residues directly interacts with INH: Arg104, Asp137, His108, Ile228, Trp107, Tyr229, and Val230. The residues with the highest interaction energies are Arg104 (-39.64 kcal/mol) and Asp137 (-32.85 kcal/mol) mainly due to strong iondipole and H-bonding interactions present in the complexes, while the weakest interaction was observed for Ile228 (-13.78 kcal/mol). Molecular electrostatic potential surface revealed complementary regions for dipole interactions and charge distribution analysis further shows that INH generally donates electrons to the residues. The results in this study agrees with the previous experimental findings and provides new insights into the catalase dependent activation of INH and the methods presented may be valuable in the study of biological metabolism of molecules.
ChemInform, 1988
The oxirane activated triflyl-β-L-ribopyranoside (I) reacts with amino acids or peptides protecte... more The oxirane activated triflyl-β-L-ribopyranoside (I) reacts with amino acids or peptides protected at the carboxylic end such as (IIa) or (IIb) to give the amino-α-D-lyxopyranosides (III). Acid-catalyzed epoxide opening of (IIIa) yields on simultaneous saponification the L-xylopyranoside (IV) as main product.
Journal of the Chemical Society, 1994
We studied the sorption mechanism of atomic hydrogen on the zigzag edge of pristine bilayer graph... more We studied the sorption mechanism of atomic hydrogen on the zigzag edge of pristine bilayer graphene (BLG) as groundwork effort in the realization of the material’s utilization as the substrate in a hydrogen storage system. Using density functional theory, we performed total energy calculations, using pseudopotentials obtained from projector augmented wave (PAW) method. The Kohn-Sham equations were solved using plane waves with kinetic energies of 400 eV. The surface Brillouin zone integration was performed using the special-point sampling technique of Monkhorst and Pack (with 4×4×1 sampling meshes). For the exchange correlation energy, we adopted the generalized gradient approximation (GGA) using the Perdew-Burke-Ernzerhof (PBE) functional. Each layer in the slab model we used in the calculations consisted of 28 sp2-bonded carbon atoms with in-plane carboncarbon distance of 1.42 Å and out-of-plane equilibrium stacking distance of 3.5 Å. Results revealed at least two non-activated r...
philsciletters.org
... Email Address: jose.isagani.janairo@dlsu.edu.ph gerardo.janairo@dlsu.edu.ph Submitted: Novemb... more ... Email Address: jose.isagani.janairo@dlsu.edu.ph gerardo.janairo@dlsu.edu.ph Submitted: November 24, 2011 Accepted: November 28, 2011 Published: January 13, 2012 Editor-in-charge: Eduardo A. Padlan Reviewer: Eduardo A. Padlan Page 2. ...
Scientia Agriculturae Bohemica, 2019
A support vector machine classification algorithm was formulated to differentiate rubber cup coag... more A support vector machine classification algorithm was formulated to differentiate rubber cup coagulum according to the type of acid coagulant used. Two classification models were established, a binary classification algorithm and a model that can identify if formic, acetic, sulfuric acid, or no acid was used to induce coagulation. The models were based on the properties of the rubber cup coagulum that are easy to measure, such as tensile strength, water contact angle, and density. The binary classification model, which differentiates the industry-accepted formic acid-coagulated rubber cup coagulum from those which are not, exhibited satisfactory reliability, as evidenced by a 92% overall prediction accuracy and 71.4% cross-validation accuracy. Moreover, it was also determined that the rubber properties density, and water contact angle were important contributors for the classification. Acid-induced rubber coagulation is an important post-harvest process that influences the resulting...
abstract: The DNA intercalating potential of the previously prepared water-soluble glycosylated t... more abstract: The DNA intercalating potential of the previously prepared water-soluble glycosylated tetrathiafulvene (TTF) and dithiolene derivatives was assessed through comparative docking analysis using doxorubicin as the reference molecule. Comparing the binding orientations and statistical evaluation of the ten lowest energy poses of each molecule with doxorubicin revealed that the glycosylated TTF derivatives are more likely to possess DNA intercalating activity since they posses lower energy values although adopted a different binding orientation. Results obtained will provide important preliminary insight on the possible biological applications of these glycoconjugates and may aid further development of these compounds for the intention of utilizing them as anti-tumor agents.
Quantitation of the total protein content in a sample is a critical step in protein analysis. Mol... more Quantitation of the total protein content in a sample is a critical step in protein analysis. Molecular UV-Vis absorption spectroscopy is very efficient in quantitative analysis such as protein quantitation and has extensive applications in chemical and clinical laboratories worldwide. Among the various techniques for protein assay, biuret test is of particular interest in this study. This study sought to verify the sensitivity of biuret assay to protein samples with concentrations ranging from 0.0100 to 5.00 mg/mL. Albumin chicken egg was used as the protein sample. The assay was assessed to determine the range of concentration in which it will show linearity. The biuret test exhibited linearity in a wide range of concentrations (0.1000 ± 0.0004 to 5.00 ± 0.02 mg/mL). The starting protein concentration range established for the calibration curve of this assay is lower than the found literature value (1 mg/sample). The study provides a more workable range of biuret test.
Scientists have not only helped us understand the universe but they have enormously contributed t... more Scientists have not only helped us understand the universe but they have enormously contributed to the betterment of human society. However when personal ambitions, politics and greed are intertwined with scientific altruism, the outcome could make a scientist either a hero or a villain. Although there are a number of great scientists who have had such colorful and intriguing scientific career, none could be as interesting and tragic as Fritz Haber. At the start of the twentieth century, the world was at the brink of global famine. A call was made to all scientists to find a solution. Fritz Haber was a German scientist who found the solution. His discovery saved the world but it was also used to kill millions of people in the last two world wars. This is the story of a genius who is today remembered for discoveries that influence the way we produce our food and how we wage war, contributions which continue to have a huge ecological impact worldwide.
SCIENDO, 2018
A support vector machine classification algorithm was formulated to differentiate rubber cup coag... more A support vector machine classification algorithm was formulated to differentiate rubber cup coagulum according to the type
of acid coagulant used. Two classification models were established, a binary classification algorithm and a model that can
identify if formic, acetic, sulfuric acid, or no acid was used to induce coagulation. The models were based on the properties of
the rubber cup coagulum that are easy to measure, such as tensile strength, water contact angle, and density. The binary classification
model, which differentiates the industry-accepted formic acid-coagulated rubber cup coagulum from those which are
not, exhibited satisfactory reliability, as evidenced by a 92% overall prediction accuracy and 71.4% cross-validation accuracy.
Moreover, it was also determined that the rubber properties density, and water contact angle were important contributors for
the classification. Acid-induced rubber coagulation is an important post-harvest process that influences the resulting rubber
quality. Thus, the accurate differentiation of the rubber samples is useful for quality assurance purposes, as well as in policy
enforcement.
Nova Biotechnologica et Chimica
The increasing prevalence of mosquito – borne diseases has prompted intensified efforts in the pr... more The increasing prevalence of mosquito – borne diseases has prompted intensified efforts in the prevention of being bitten by the vector. Among the various strategies of vector control, the application of repellents provides instant and effective protection from mosquitoes. However, emerging concerns regarding the safety of the widely used repellent, DEET, has led to initiatives to explore natural alternatives. In order to fully realize the potential of natural repellents, focusing on the discovery of natural compounds eliciting repellency is of paramount importance. In this paper, machine learning was utilized to establish association between the mosquito repellent activity of 33 natural compounds using 20 chemical descriptors. Individually, the descriptors had insignificant monotonic relationship with the response variable. But when optimized, the formulated model through boosted trees regression exhibited reliable predictive ability (r2 train = 0.93, r2 test = 0.66, r2 overall = 0...
Nova Biotechnologica et Chimica
The increasing prevalence of mosquito – borne diseases has prompted intensified efforts in the pr... more The increasing prevalence of mosquito – borne diseases has prompted intensified efforts in the prevention of being bitten by the vector. Among the various strategies of vector control, the application of repellents provides instant and effective protection from mosquitoes. However, emerging concerns regarding the safety of the widely used repellent, DEET, has led to initiatives to explore natural alternatives. In order to fully realize the potential of natural repellents, focusing on the discovery of natural compounds eliciting repellency is of paramount importance. In this paper, machine learning was utilized to establish association between the mosquito repellent activity of 33 natural compounds using 20 chemical descriptors. Individually, the descriptors had insignificant monotonic relationship with the response variable. But when optimized, the formulated model through boosted trees regression exhibited reliable predictive ability (r2 train = 0.93, r2 test = 0.66, r2 overall = 0...
Annals of Tropical Research
The amounts of P, K, Ca, Mg, Na, Fe, Zn, Mn, Cu, B, Pb, and Cd in both grits and hull/testa of Ad... more The amounts of P, K, Ca, Mg, Na, Fe, Zn, Mn, Cu, B, Pb, and Cd in both grits and hull/testa of Adlay (Coix lacryma-jobi L., Gulian variety) in Bukidnon, Philippines, were quantified relative to the pH, electrical conductivity (EC), cation-exchange capacity (CEC), and amounts of organic matter (OM), N, P, K, Ca, Mg, Na, Fe, Zn, Mn, Cu, B, Pb, and Cd of the soils where these plants were grown. The P, K, Ca, Fe, and Cu contents in grits were differentiated by P, CEC, Ca, Fe, and Zn of the soil, respectively. The accumulations of both Mg and Zn in grits were influenced only by the pH of the soil while the Mn contents in grits were influenced by both pH and Mn content of the soil. The Fe, Zn, and B contents of hull/testa were significantly differentiated by the Zn, Fe and OM of the soil, respectively. The mean amounts of macr-oelements in both grits and hull/testa were in the order of K>P>Mg>Ca. The mean micro-element contents in grits were in the order of Fe>Na>Mn>Zn&g...