[ Y112 ] Chem Draw it: Graduate students’ feedback on Learning Advanced Inorganic Chemistry using chemical drawing software

Luningning M. Mendoza 1,*, Mamerto C. Mendoza 2 and Danila S. Paragas 3

ABSTRACT:

This study aims to determine the feedback of the graduate students in Central Luzon State University on using the chemical software Chem Sketch in learning Advanced Inorganic Chemistry and its contribution to their performance in the said subject. This study used a desc...  show all / hide

This study aims to determine the feedback of the graduate students in Central Luzon State University on using the chemical software Chem Sketch in learning Advanced Inorganic Chemistry and its contribution to their performance in the said subject. This study used a descriptive correlation research design and was conducted among MS Chemistry Education and Master in Chemistry graduate students with Advanced Inorganic Chemistry subject in CLSU, Munoz, Nueva Ecija. The researchers used a complete enumeration survey method since the data population is small. The instrument of the study was a survey questionnaire. Frequency, percentage, mean, Pearson correlation were utilized in analyzing the data. The study found that majority of the graduate students were young adults; female, graduate of BS Chemistry and worked as science teacher or instructor. The respondents were satisfied on using the chemical software Chem Sketch in learning Advanced Inorganic Chemistry. The chemical software had a high contribution to the graduate respondents’ performance in Inorganic Chemistry. There is no significant relationship between between the profile of respondents and their feedback on utilizing Chem Sketch in learning Advanced Inorganic Chemistry.

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[ Y113 ] Pedagogy in teaching Capstone in Occidental Mindoro State College Sablayan Campus in relation to teacher’s performance evaluation

Luningning M. Mendoza 1,* and Mamerto C. Mendoza 2

ABSTRACT:

This study aims to determine the pedagogy used in teaching Capstone in OMSC Sablayan Campus and find out if there is a significant relationship between the faculty’s pedagogy in teaching Capstone and their performance rating. Descriptive correlation research design wa...  show all / hide

This study aims to determine the pedagogy used in teaching Capstone in OMSC Sablayan Campus and find out if there is a significant relationship between the faculty’s pedagogy in teaching Capstone and their performance rating. Descriptive correlation research design was utilized in this study and was conducted in OMSC Sablayan Campus. The respondents of the study were the Capstone students of academic year 2019-2020 and the faculty who were teaching Capstone or Research subject. The student respondents were selected using random sampling. Through google form, the data from the respondents were easily collected in real time by the researchers. In analyzing the gathered data, frequency, percentage, mean and Pearson r correlation were employed. Results showed that time management contributed a great extent to the difficulty of the students in learning Capstone. The pedagogy often used in teaching Capstone in OMSC Sablayan Campus was authentic learning. Majority of the faculty who were teaching research received a very satisfactory in their performance rating. There was a significant relationship between the challenges faced by the student respondents and the pedagogy used by faculty in teaching Capstone. Likewise, faculty’s pedagogy in teaching the said subject and their performance rating were significantly related.

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[ Y114 ] Response surface optimization of alkali/acid pretreated gelatin extraction from the by-products of milkfish (Chanos chanos) processing

Rosalie R. Rafael 1, Danila S. Paragas 1,*, Ervee P. Landingin 1, Luzviminda S. Quitos 2, Sharon E. Lazaro 2 and Fatima M. Medina 2

ABSTRACT:

Utilization and conversion of the fish by-products into intermediate products such as gelatin addresses the annually increasing waste production of the fish processing industry. The gelatin from mammalian sources has been linked to religious and health-related issues. T...  show all / hide

Utilization and conversion of the fish by-products into intermediate products such as gelatin addresses the annually increasing waste production of the fish processing industry. The gelatin from mammalian sources has been linked to religious and health-related issues. Thus, this study was conducted to optimize gelatin extraction from milkfish (Chanos chanos) as a substitute for mammalian gelatin. Box-Behnken Design (BBD) with three factors: (sodium hydroxide [NaOH], sulfuric acid [H2SO4] and citric acid concentrations) at three levels for each variable was used to determine the optimum conditions to come up with the highest yield of gelatin. Different concentrations of the acid and base yielded significantly different amounts of gelatin. Sulfuric acid significantly affects milkfish scales, citric acid on milkfish fins, and NaOH on milkfish bones and skin. Both experimental and predicted yield matched each other, indicating that the estimation models accurately predicted the dependent variables. The properties of the extracted gelatin are identical to those from other sources. The highest optimum yield of 15.26% could be obtained from milkfish skin at concentrations of 0.40 % NaOH, 0.33% sulfuric acid and 0.7% citric acid.

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[ Y115 ] Development of biosorbent using mango (Mangifera indica l.) peels for the recovery of gold from e-waste

Arvin Luis M. Santos 1*, Danila S. Paragas1, Cesar V. Ortinero2, Redel L. Gutierrez 1

ABSTRACT:

E-waste or electronic waste broadly describes loosely discarded, out-of-date, broken or electronic devices. Current technology for the recovery of gold from ores involves using chemical methods, such as cyanidation and thiourea leaching, which present environmental and ...  show all / hide

E-waste or electronic waste broadly describes loosely discarded, out-of-date, broken or electronic devices. Current technology for the recovery of gold from ores involves using chemical methods, such as cyanidation and thiourea leaching, which present environmental and health risks. Biosorption is another technique to extract metals such as precious and non-precious metals from a solution containing metals. Agricultural waste (mango peel) is a significant by-product of the mango-processing industry. This study used a mango peel as a biosorbent to recover gold from e-waste. The electronic waste was fully leached using an aqua regia solution. The biosorbent was obtained by mixing mango peel with three different volumes of concentrated sulfuric acid. The absorption was carried out by mixing the biosorbent and the gold-containing solution. The biosorbent before and after adsorption was characterized using a scanning electron microscope (SEM), Fourier transform infrared (FTIR) spectroscopy and optical microscope. The adsorption experiment was successfully carried out, which is proved by using optical observation using a microscope. The SEM micrographs showed the surface morphology of the biosorbent that as the concentration of sulfuric acid increases, the surface area also increases and found that treatment 2 (10:75mL) has the best crosslinked and adsorption product. The FTIR confirmed the reduction of gold ion to gold metal due to band broadening of the hydroxyl group and the appearance of an intense peak of C=O. The qualitative analysis confirmed the presence of gold after adsorption. The metal (gold) was successfully recovered from electronic waste using the crosslinked product from mango peel.

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[ Y116 ] Preliminary assessment on antisense oligodeoxynucleotide knockdown of porcine TGFβ1 mRNA in porcine monocyte-derived macrophages stimulated with lipopolysaccharide

Dante Fabros Jr.1 and Wasin Charerntantanakul 1,*

ABSTRACT:

Phosphorothioate-modified antisense oligodeoxynucleotide was used to activate RNase-H mediated pathway of TGFβ1 mRNA degradation. In this study, porcine monocyte-derived macrophages (MDMs)was cultivated through continuous plate adherence. Two micromolars of AS-ODN in 1...  show all / hide

Phosphorothioate-modified antisense oligodeoxynucleotide was used to activate RNase-H mediated pathway of TGFβ1 mRNA degradation. In this study, porcine monocyte-derived macrophages (MDMs)was cultivated through continuous plate adherence. Two micromolars of AS-ODN in 1.5% lipofectamine was transfected to MDMs for 4 h, and stimulated with LPS for additional 8 h. TGFβ1 mRNA level was measured by qPCR and were normalized with two housekeeping genes i.e. RPL32 and YWHAZ. Results showed that TGFβAS1 specific to AUG region effectively reduced TGFβ1 mRNA whereas TGFβS1 and SCR1 did not affect the TGFβ1 mRNA expression. The results will be used in succeeding experiments to evaluate the TGFβ1 paracrine and autocrine function system with other pro-inflammatory and anti-inflammatory cytokines in porcine monocyte-derived macrophages milieu.

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[ Y117 ] Development of choline biosensor using choline oxidase co-immobilization of gold and platinum bimetallic at carbon nanomaterials in chitosan reticulum

Suphaporn Chenkhuruthum1, Anchana Preechaworapun2, Tanin Tangkuaram1,*

ABSTRACT:

A choline biosensor had been developed based on choline oxidase (ChOx) immobilized with platinum and gold bimetallic (PtAu) at carbon dot composite carbon nanotube (@C-CNTs) in chitosan (CHIT) scaffold on a glassy carbon electrode (ChOx/PtAu@C-CNTs-CHIT/GCE). K2PtCl6 an...  show all / hide

A choline biosensor had been developed based on choline oxidase (ChOx) immobilized with platinum and gold bimetallic (PtAu) at carbon dot composite carbon nanotube (@C-CNTs) in chitosan (CHIT) scaffold on a glassy carbon electrode (ChOx/PtAu@C-CNTs-CHIT/GCE). K2PtCl6 and HAuCl4 were used as precursors for the synthesis of the bimetallic nanoparticles and it will be characterized by a scanning electron microscope (SEM). The cyclic voltammetric and amperometric techniques were used to detect signals from the ChOx enzyme reaction as the oxidative reaction from the product hydrogen peroxide. The choline biosensor was operated at an applied potential of +0.95 V, and the ChOx of 2.5 units showed linear ranges of 0.05 – 10 mM (R² = 0.9953) with a limit of detection of 25.17 μM.

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[ Y118 ] Tyrosinase immobilization on home-made screen-printed carbon electrode with chitosan at carbon dot as a dopamine biosensor

Tanin Tangkuaram1,2,*, Tik Ouiram2, Nuenghathai Chaiya2, Jirapatpong Senabut2, Anchana Preechaworapun3

ABSTRACT:

Dopamine biosensor was developed using chitosan at carbon dots (CHIT@CD) and the tyrosinase enzymes (Tyr) on the surface of screen-printed carbon electrode (SPCE) (SPCE/CHIT@CD/Tyr). The repeatability and reproducibility of SPCE/CHIT@CD/Tyr were found to be 2.58 % RSD a...  show all / hide

Dopamine biosensor was developed using chitosan at carbon dots (CHIT@CD) and the tyrosinase enzymes (Tyr) on the surface of screen-printed carbon electrode (SPCE) (SPCE/CHIT@CD/Tyr). The repeatability and reproducibility of SPCE/CHIT@CD/Tyr were found to be 2.58 % RSD and 3.75 % RSD, respectively. The electrode is stable 25 times and the linearity is 0.1 μM - 0.10 mM with the detection limit at 0.036 μM.

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[ Y119 ] A Non-enzymatic Glucose Sensor using Rose-like Nickel Particles modified on Glassy Carbon Electrode

Kulwadee Pinwattana1,*, Naruemol Mangmee1, Padarat Ninjiaranai1, Prayoon Khamterm2, Rapiphun Janmanee1, Jiraporn Kitikul3, Anchana Preechaworapun1 and Tanin Tangkuaram3

ABSTRACT:

In this work, a non-enzymatic glucose sensor has been successfully fabricated using rose-like nickel particles as a catalyst. The rose-like nickel structure assembled from nanosheets was synthesized by an easy one-step hydrothermal method in Teflon-lined stainless steel...  show all / hide

In this work, a non-enzymatic glucose sensor has been successfully fabricated using rose-like nickel particles as a catalyst. The rose-like nickel structure assembled from nanosheets was synthesized by an easy one-step hydrothermal method in Teflon-lined stainless steel autoclaves. The hydrolysis of nickel chloride can procedure in the mixed solvents of water and ethanol with the assistance of polyethylene glycol. The morphological structure of the rose-like nickel particles was characterized by scanning electron microscopy, and the result showed that a 3D rose-like nickel has a sheet-like crystal with a thickness size of 40-50 nm. The glucose electrocatalytic property of the rose-like nickel particles was investigated by cyclic voltammetry and amperometry. The glucose measurement was carried out in 0.1 M NaOH solution. The improved response of glucose at rose-like nickel particles modified on a glassy carbon electrode surface was obtained by electrochemical technique. The oxidation current had a wide linear response with glucose concentration in the range between 0.0012 and 15.70 mM with an excellent low detection limit, under the optimum condition.

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[ Y120 ] Development of lead (II) ion electrochemical sensor using imprinted polymers at graphene oxide (GO@IIP) modified glassy carbon electrode

Nuenghathai Chaiya1, Anchana Preechaworapun2, Weerakanya Maneeprakorn3 and Tanin Tangkuaram1,*

ABSTRACT:

An electrochemical sensor for the determination of lead (II) ion on the surface of glassy carbon electrode (GCE) was studied. The GCE was developed using imprinted polymers at graphene oxide (GO@IIP). The square wave anodic stripping voltammetry technique was used for t...  show all / hide

An electrochemical sensor for the determination of lead (II) ion on the surface of glassy carbon electrode (GCE) was studied. The GCE was developed using imprinted polymers at graphene oxide (GO@IIP). The square wave anodic stripping voltammetry technique was used for the determination of Pb2+. This sensor showed linearity from 50 ppb to 50,000 ppb (y = 0.0087x + 3.0769, R2 = 0.9972) with a detection limit at 9.9 ppb.

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[ Y121 ] Automatic life-support system for aquariums at Fish Diseases and Fisheries Biology Laboratory at LMU

Dejan N. Milic1, Dusan Palic2, Vladimir Cokanovic1 and Nenad Petrovic1,*

ABSTRACT:

This paper presents a network of sensors and actuators developed for fish life support at Fish Diseases and Fisheries Biology Laboratory at Ludwig-Maximilians University in Munich. The laboratory consists of several rooms, each containing multiple aquarium tanks with di...  show all / hide

This paper presents a network of sensors and actuators developed for fish life support at Fish Diseases and Fisheries Biology Laboratory at Ludwig-Maximilians University in Munich. The laboratory consists of several rooms, each containing multiple aquarium tanks with different fish species. Purpose of the network is to enable automatic life support with pre-defined parameters, thus allowing the laboratory staff to concentrate on research instead on performing repetitive tasks of the life-support system. Sensor/actuator network is controlled via a single server that collects the monitoring data and provides access to system parameters via web-interface, but the network can also function without the centralized infrastructure if a node or a group of nodes becomes detached from the network.

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