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Fulltext Physicochemical Properties and Release Study of Antimetabolite-Incorporated Stearoyl Chitosan

Marlina A, Misran M

ACS Omega, 2023 Oct 31;8(43):40494-40507.
PMID: 37929136 DOI: 10.1021/acsomega.3c05108

Stearoyl chitosan (SC), derived from the acylation of chitosan, contributes to the efficiency of drug delivery systems because of its structure, which accommodates the drug in a particle. Nonetheless, its role in chemotherapy has been largely unexplored. The present study involves the synthesis of stearoyl chitosan through the reaction of depolymerized chitosan with stearoyl chloride under mild reaction conditions. The resulting compound was subjected to structural analysis utilizing Fourier-transform infrared (FTIR) spectroscopy, 1H NMR, and X-ray diffraction (XRD) spectroscopy. The dispersion of SC molecules in phosphate-buffered saline (PBS) forms SC nanoparticles. The best dispersion of SC in the solution was achieved at a 1:60 chitosan-to-stearoyl chloride weight ratio. Three antimetabolite drugs, methotrexate, pemetrexed, and raltitrexed, were selected to examine the loading efficacy of SC. Pemetrexed had the highest drug-loading value of 36.8% among the three antimetabolites incorporated into SC, along with an encapsulation efficiency of 85.1%. The size of SC loaded with antimetabolites ranged from 225 to 369 nm, and their spherical form was verified via a transmission electron microscope. The in vitro release study showed that SC demonstrated controlled drug release, suggesting that SC nanoparticles have significant promise as a delivery strategy for chemotherapy.
Big data management skills: accurate measurement

McKay E, Mohamad MB

Res Pract Technol Enhanc Learn, 2018;13(1):5.
PMID: 30595736 DOI: 10.1186/s41039-018-0071-2

Some say that big data is transforming business and society. This can mean wide-reaching disruption for commerce, health and world governance. Few authors agree on what constitutes big data, depending on the philosophical stance taken. Our propensity for keeping data archived is posing major issues globally, with retrieval and application of such data crossing ethical boundaries. However, one of the more pressing issues is the growing need for confirming whether those working with such big data have the required digital skills to cope. This paper presents one effective and efficient way to identify such digital skill acquisition. We show the progression from the earlier approach used for measuring proficiency between novice and experienced programmers using traditional statistical measures, to adopting a more comprehensive unidimensional scale that empowers comprehension of human performance and test item performance relative to each other. This methodology offers an effective tool for understanding individual of differences in digital skill development.
Fulltext Correction to: Big data management skills: accurate measurement

McKay E, Mohamad MB

Res Pract Technol Enhanc Learn, 2018;13(1):8.
PMID: 31186813 DOI: 10.1186/s41039-018-0074-z

[This corrects the article DOI: 10.1186/s41039-018-0071-2.].
Fulltext Development of Nanostructured Lipid Carrier-Loaded Flavonoid-Enriched Zingiber officinale

Shazwani SS, Marlina A, Misran M

ACS Omega, 2024 Apr 16;9(15):17379-17388.
PMID: 38645372 DOI: 10.1021/acsomega.4c00091

Flavonoids, which are bioactive molecules found in Zingiber officinale, have been widely used as antioxidant and anti-inflammatory drugs. The presence of nanostructured lipid carriers (NLCs) as sophisticated delivery systems for bioactive compounds, such as flavonoids, can increase their bioavailability and stability, thus potentially producing better therapeutic effects. This study aimed to develop an anti-inflammatory topical gel using NLC-containing flavonoids derived from Zingiber officinale. The NLC formulation was prepared using stearic acid, a mixture of medium-chain triglycerides and isopropyl myristate, Tween 20, and Span 20 by using a hot homogenization method. The total flavonoid content obtained through sequential maceration stages was 4.04 mg of QUE/g of dry extract. The highest encapsulation efficiency of flavonoid-loaded NLC was observed at a flavonoid, Zingiber officinale extract (ZOE) concentration of 2%. It was found that a ZOE concentration of 0.4% provided excellent stability with a particle size of 302-344 nm and a polydispersity index of 0.14-0.23 after 28 days of observation. Morphological analysis of the ZOE-loaded NLC revealed a stable and well-developed formulation with a fairly uniform distribution. The presence of distinctive and uniformly distributed single particles suggests a promising alternative drug delivery system for conventional topical preparations. ZOE-loaded NLC gel showed solid-like properties and higher quality stability than the gel.
Fulltext Small bowel obstruction secondary to obturator hernia: A pre-operative diagnosis at computed tomography

Marlina Tanty Ramli Hamid, Mohd Shukry Mohd Khalid, Kartini Rahmat

Journal of Clinical and Health Sciences, 2021;6(1):46-49.
MyJurnal

Obturator hernia is rare, but it must be considered in elderly patients who present with small
bowel obstruction. The diagnosis is challenging unless there is a high index of suspicion as
the presenting symptoms and signs are usually non-specific. Presence of positive HowshipRomberg sign is considered pathognomonic. Early diagnosis and rapid surgical intervention
will reduce the high morbidity and mortality associated with undiagnosed obturator hernia. We
report a case of a 93-year-old female patient who was admitted to our surgical department with
symptoms of intestinal obstruction of 3-days duration. Howship-Romberg sign was negative.
Computed tomography (CT) demonstrated the presence of left obturator hernia with proximal
small bowel obstruction and no sign of strangulation. The patient had emergency laparotomy
post-CT where the incarcerated bowel loop was released and the obstructed bowel was
decompressed without any complication. The hernial defect was close with a mesh and the
patient had an uneventful recovery post-surgery. In this case, we highlight that diagnosis of
obturator hernia must always be considered in elderly patients who present with intestinal
obstruction. Urgent CT could establish a rapid pre-operative diagnosis and aids in appropriate
surgical intervention planning which is crucial in optimising the outcome.
Fulltext Transverse-sigmoid sinus dural arteriovenous fistula presenting with recurrent transient ischaemic attack: A technical case report

Marlina Tanty Ramli Hamid, Khairul Azmi Abdul Kadir

Journal of Cardiovascular, Neurovascular and Stroke, 2020;2(1):13-17.
MyJurnal

Intracranial dural arteriovenous fistulae (DAVF) are uncommon and account for approximately 1% of all strokes. All transverse-sigmoid sinus DAVFs require treatment because of the low rate of spontaneous regression and frequent association with aggressive neurologic symptoms. Endovascular embolization which aims for permanent obliteration of the lesion is now the primary treatment modality for all DAVFs. We present a 56-year-old patient with long standing history of intermittent transient ischaemic attack (TIA)-like symptoms. Magnetic resonance (MR) angiography revealed right transverse-sigmoid sinus DAVF and bilateral vertebral arteries occlusion. The patient’s symptoms completely resolved upon successful trans-arterial embolization of the DAVF
Fulltext Development of a Real-Time Cell Analysing (RTCA) method as a fast and accurate screen for the selection of chikungunya virus replication inhibitors

Marlina S, Shu MH, AbuBakar S, Zandi K

Parasit Vectors, 2015;8:579.
PMID: 26553263 DOI: 10.1186/s13071-015-1104-y

The xCELLigence real-time cell analysis (RTCA) system is an established electronic cell sensor array. This system uses microelectronic biosensor technology that is verified for real-time, label-free, dynamic and non-offensive monitoring of cellular features, including detection of viral cytopathic effect (CPE). Screening viral replication inhibitors based on presence of CPE has been applied for different viruses, including chikungunya virus (CHIKV). However, most CPE-based methods, including MTT and MTS assays, do not provide information on the initiation of CPE nor the changes in reaction rate of the virus propagation over time. Therefore, in this study we developed an RTCA method as an accurate and time-based screen for antiviral compounds against CHIKV.
Dorsal Hand Vein Image Enhancement Using Fusion of CLAHE and Fuzzy Adaptive Gamma

Yakno M, Mohamad-Saleh J, Ibrahim MZ

Sensors (Basel), 2021 Sep 27;21(19).
PMID: 34640769 DOI: 10.3390/s21196445

Enhancement of captured hand vein images is essential for a number of purposes, such as accurate biometric identification and ease of medical intravenous access. This paper presents an improved hand vein image enhancement technique based on weighted average fusion of contrast limited adaptive histogram equalization (CLAHE) and fuzzy adaptive gamma (FAG). The proposed technique is applied using three stages. Firstly, grey level intensities with CLAHE are locally applied to image pixels for contrast enhancement. Secondly, the grey level intensities are then globally transformed into membership planes and modified with FAG operator for the same purposes. Finally, the resultant images from CLAHE and FAG are fused using improved weighted averaging methods for clearer vein patterns. Then, matched filter with first-order derivative Gaussian (MF-FODG) is employed to segment vein patterns. The proposed technique was tested on self-acquired dorsal hand vein images as well as images from the SUAS databases. The performance of the proposed technique is compared with various other image enhancement techniques based on mean square error (MSE), peak signal-to-noise ratio (PSNR), and structural similarity index measurement (SSIM). The proposed enhancement technique's impact on the segmentation process has also been evaluated using sensitivity, accuracy, and dice coefficient. The experimental results show that the proposed enhancement technique can significantly enhance the hand vein patterns and improve the detection of dorsal hand veins.
Fulltext Dimensions of Interactive Pervasive Game Design: Systematic Review

Kai L, Tan WH, Saari EM

JMIR Serious Games, 2023 Aug 22;11:e42878.
PMID: 37463860 DOI: 10.2196/42878

BACKGROUND: As the gaming industry grows around the world, playing pervasive games is becoming an important mode of entertainment. A pervasive game is one in which the game experience extends into the actual world or where the fictive world of the game merges with the physical world. How pervasive games can adapt to the ever-changing nature of technology and design in current society requires a comprehensive review.
OBJECTIVE: In this systematic review, we aimed to measure and analyze 4 dimensions of pervasive games through development, technology, experience, and evaluation. Moreover, we also aimed to discover and interpret their relationship with game, interaction, experience, and service design.
METHODS: We first chose 3 well-known databases, Web of Science, Scopus, and EBSCO, and searched from 2013 to April 2022. A strictly thorough Boolean search for research keywords such as "pervasive game," "design," and "interactive" resulted in 394 relevant articles. These articles were identified, screened, and checked for eligibility to find valid and useful articles, which were then categorized and analyzed using the PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) method.
RESULTS: The systematic selection was finally left with 40 valid and valuable articles. After categorization and analysis, all articles were classified according to 4 main themes, which were design and development (11/40, 28%), interaction and technology (15/40, 38%), users and experience (9/40, 23%), and evaluation and service (5/40, 13%). These 4 main areas can be subdivided into several smaller areas.
CONCLUSIONS: In the 4 areas of game design, interaction design, experience design, and service design, many scholars have studied pervasive games and made contributions. Although the development and technology of pervasive games have evolved with the times, there is still a need to strengthen emerging design concepts within pervasive games.
Fulltext Adult Intramuscular Shoulder Angiomyolipoma: a rare case

Kadhim Jawad Obaid, Yahya Mohammad Arpine, Nor Salmah Bakar, Marlina Tanty Ramli Hamid, Ahmed Ramzi Yusof

Journal of Clinical and Health Sciences, 2016;1:37-39.

Intramuscular shoulder angiomyolipomas are very rare. We report a case in a 22-year-old male with a well circumscribed lesion located on the back of the shoulder. This lesion, differs from renal angiomyolipoma in terms of non-association with tuberous sclerosis, circumscription and male predominance. Another characteristic feature is the absence of epithelioid cells. Differential diagnosis includes lipoma, angiolipoma, angioleiomyoma, hemangioma, myolipoma and liposarcoma. It is distinguished from the above mentioned entities by the presence of a combination of thick-walled blood vessels, smooth muscle and fat.
Fulltext Antibiotic resistance and plasmid profiling of Vibrio parahaemolyticus isolated from cockles in Padang, Indonesia

Zulkifli, Y., Alitheen, N.B., Raha, A.R., Yeap, S.K., Marlina, Son, R., et al.

International Food Research Journal, 2009;16(1):53-58.
MyJurnal

Vibrio parahaemolyticus is one of the most widely recognized pathogenic Vibrio species due to numerous outbreaks and its’ wide occurrence in marine environment. In this study, 32 isolates of V. parahaemolyticus isolated from cockles were tested for sensitivity to 16 antibiotics and the presence of plasmids. All the isolates were multi-resistance, defined as resistant to atleast three different antibiotics with multiple antibiotic resistance indexes ranging from 0.31 to 0.69, indicating the isolates originate from high risk sources of contamination where antibiotics are often used. In the plasmid profiling test, only 15 isolates (47%) harbored plasmid DNA, which ranged in size from 2.7 to 56.2 kb, separating the isolates into 14 plasmid profiles. Hence, food contaminated with antibiotic resistant V. parahaemolyticus could be a major threat to public health due to the distinct possibility that they can be a significant reservoir of genes encoding antibiotic resistance determinants that can be transferred intra or interspecies. As in many developing countries, raw food hygiene and antimicrobial resistance epidemiology is still in the infancy stage in the locality of the study and thus our data provide a current baseline profile of antimicrobial resistance and plasmid of V. parahaemolyticusfrom cockles in Padang, Indonesia.
Fulltext Adult Intramuscular Shoulder Angiomyolipoma: a rare case

Kadhim Jawad Obaid, Yahya Mohammad Arpine, Nor Salmah Bakar, Marlina Tanty Ramli Hamid, Ahmed Ramzi Yusof

Journal of Clinical and Health Sciences, 2016;1(2):37-39.
MyJurnal

Intramuscular shoulder angiomyolipomas are very rare. We report a case in a 22-year-old male with a well circumscribed lesion located on the back of the shoulder. This lesion, differs from renal angiomyolipoma in terms of non-association with tuberous sclerosis, circumscription and male predominance. Another characteristic feature is the absence of epithelioid cells. Differential diagnosis includes lipoma, angiolipoma, angioleiomyoma, hemangioma, myolipoma and liposarcoma. It is distinguished from the above mentioned entities by the presence of a combination of thick-walled blood vessels, smooth muscle and fat.
Fulltext Elucidating the Efficacy of Vaccination against Vibriosis in Lates calcarifer Using Two Recombinant Protein Vaccines Containing the Outer Membrane Protein K (r-OmpK) of Vibrio alginolyticus and the DNA Chaperone J (r-DnaJ) of Vibrio harveyi

Silvaraj S, Md Yasin IS, A Karim MM, Saad MZ

Vaccines (Basel), 2020 Nov 06;8(4).
PMID: 33171991 DOI: 10.3390/vaccines8040660

Recombinant cell vaccines expressing the OmpK and DnaJ of Vibrio were developed and subsequently, a vaccination efficacy trial was carried out on juvenile seabass (~5 cm; ~20 g). The fish were divided into 5 groups of 50 fish per group, kept in triplicate. Groups 1 and 2 were injected with 107 CFU/mL of the inactivated recombinant cells vaccines, the pET-32/LIC-OmpK and pET-32/LIC-DnaJ, respectively. Group 3 was similarly injected with 107 CFU/mL of inactivated E. coli BL21 (DE3), Group 4 with 107 CFU/mL of formalin killed whole cells V. harveyi, and Group 5 with PBS solution. Serum, mucus, and gut lavage were used to determine the antibody levels before all fish were challenged with V. harveyi, V. alginolyticus, and V. parahemolyticus, respectively on day 15 post-vaccination. There was significant increase in the serum and gut lavage antibody titers in the juvenile seabass vaccinated with r-OmpK vaccine. In addition, there was an up-regulation for TLR2, MyD88, and MHCI genes in the kidney and intestinal tissues of r-OmpK vaccinated fish. At the same time, r-OmpK triggered higher expression level of interleukin IL-10, IL-8, IL-1ß in the spleen, intestine, and kidney compared to r-DnaJ. Overall, r-OmpK and r-DnaJ triggered protection by curbing inflammation and strengthening the adaptive immune response. Vaccinated fish also demonstrated strong cross protection against heterologous of Vibrio isolates, the V. harveyi, V. alginolyticus, and V. parahaemolyticus. The fish vaccinated with r-OmpK protein were completely protected with a relative per cent of survival (RPS) of 90 percent against V. harveyi and 100 percent against V. alginolyticus and V. parahaemolyticus. A semi-quantitative PCR detection of Vibrio spp. from the seawater containing the seabass also revealed that vaccination resulted in reduction of pathogen shedding. In conclusion, our results suggest r-OmpK as a candidate vaccine molecule against multiple Vibrio strain to prevent vibriosis in marine fish.
Relationship between early marriage and teenager pregnancy to stunting in toddler at Bangun Rejo Village, Tanjung Morawa District, Tanjung Morawa, Deli Serdang 2019

Pangaribuan IK, Sari I, Simbolon M, Manurung B, Ramuni K

Enferm Clin, 2020 06;30 Suppl 5:88-91.
PMID: 32713593 DOI: 10.1016/j.enfcli.2019.11.028

The brain undergoes very rapid growth and development among toddler below 5 year of age. The fault in their upbringing during this period of time will cause them to undergo growth and development disorder, and parents who get married too young early have lack of knowledge of raising their young children. As a result, the latter become vulnerable during their growth and development. The objective of the research was to analyze the correlation between early marriage and teenager pregnancy to stunting in growth among toddlers. The research used descriptive analytic method with cross-sectional design. It was conducted at Bangun Rejo Village, Tanjung Morawa District, Deli Serdang regency from June to September 2019. The population consisted of 645 toddler aged between 0 and 59 months. The sample was chosen by using systematic random sampling technique. The data were gathered by using questionnaires in order to get the information about early marriage and by conducting observation in order to find out toddler stunting. The result of univariate analysis showed that 87 (82.1%) infants had normal growth. The result of bivariate analysis, using chi-square test, showed that there was correlation between early marriage and toddler stunting, teenager pregnancy (p=0.000) and marriage age (p=0.001). The conclusion of the research was that there was correlation between early marriage and teenager pregnancy to stunting in toddler. The study showed that toddlers in case of parent with early marriage was more vulnerable to growth and development disorder. It is recommended that health service of care for adolescents and integrated monitoring of toddler be established in order to decrease the risk of incidence of early marriage and toddler stunting.
Controlled acid catalyzed sol gel for the synthesis of highly active TiO2-chitosan nanocomposite and its corresponding photocatalytic activity

Afzal S, Samsudin EM, Julkapli NM, Hamid SB

Environ Sci Pollut Res Int, 2016 Nov;23(22):23158-23168.
PMID: 27591888

For the synthesis of a highly active TiO2-chitosan nanocomposite, pH plays a crucial role towards controlling its morphology, size, crystallinity, thermal stability, and surface adsorption properties. The presence of chitosan (CS) biopolymer facilitates greater sustainability to the photoexcited electrons and holes on the catalysts' surface. The variation of synthesis pH from 2 to 5 resulted in different physico-chemical and photocatalytic properties, whereby a pH of 3 resulted in TiO2-chitosan nanocomposite with the highest photocatalytic degradation (above 99 %) of methylene orange (MO) dye. This was attributed to the efficient surface absorption properties, high crystallinity, and the presence of reactive surfaces of -NH2 and -OH groups, which enhances the adsorption-photodegradation effect. The larger surface oxygen vacancies coupled with reduced electron-hole recombination further enhanced the photocatalytic activity. It is undeniable that the pH during synthesis is critical towards the development of the properties of the TiO2-chitosan nanocomposite for the enhancement of photocatalytic activity.
Application of Artificial Intelligence (AI) System in Opportunistic Screening and Diagnostic Population in a Middle-income Nation

Hamid MTR, Mumin NA, Hamid SA, Rahmat K

Curr Med Imaging, 2024 Feb 27.
PMID: 38415464 DOI: 10.2174/0115734056280191231207052903

OBJECTIVE: This study evaluates the effectiveness of artificial intelligence (AI) in mammography in a diverse population from a middle-income nation and compares it to traditional methods.
METHODS: A retrospective study was conducted on 543 mammograms of 467 Malays, 48 Chinese, and 28 Indians in a middle-income nation. Three breast radiologists interpreted the examinations independently in two reading sessions (with and without AI support). Breast density and BI-RADS categories were assessed, comparing the accuracy, sensitivity, specificity, positive predictive value (PPV), and negative predictive value (NPV) results.
RESULTS: Of 543 mammograms, 69.2% had lesions detected. Biopsies were performed on 25%(n=136), with 66(48.5%) benign and 70(51.5%) malignant. Substantial agreement in density assessment between the radiologist and AI software (κ =0.606, p < 0.001) and the BI-RADS category with and without AI (κ =0.74, p < 0.001). The performance of the AI software was comparable to the traditional methods. The sensitivity, specificity, PPV, and NPV or radiologists alone, radiologist + AI, and AI alone were 81.9%,90.4%,56.0%, and 97.1%; 81.0%, 93.1%,55.5%, and 97.0%; and 90.0%,76.5%,36.2%, and 98.1%, respectively. AI software enhances the accuracy of lesion diagnosis and reduces unnecessary biopsies, particularly for BI-RADS 4 lesions. The AI software results for synthetic were almost similar to the original 2D mammography, with AUC of 0.925 and 0.871, respectively.
CONCLUSION: AI software may assist in the accurate diagnosis of breast lesions, enhancing the efficiency of breast lesion diagnosis in a mixed population of opportunistic screening and diagnostic patients.
KEY MESSAGES: • The use of artificial intelligence (AI) in mammography for population-based breast cancer screening has been validated in high-income nations, with reported improved diagnostic performance. Our study evaluated the usage of an AI tool in an opportunistic screening setting in a multi-ethnic and middle-income nation. • The application of AI in mammography enhances diagnostic accuracy, potentially leading to reduced unnecessary biopsies. • AI integration into the workflow did not disrupt the performance of trained breast radiologists, as there is a substantial inter-reader agreement for BI-RADS category assessment and breast density.
Evaluation on the Photocatalytic Degradation Activity of Reactive Blue 4 using Pure Anatase Nano-TiO2

Joon Ching Juan, Sze Nee Goh, Ta Yeong Wu, Emy Marlina Samsudin, Tan Tong Ling, Sharifah Bee Abd. Hamid

Sains Malaysiana, 2015;44:1011-1019.

Disposal of dye wastewater into water streams without treatment endangers human and marine lives. This work focused on the second largest class of textile dyes after azo dyes due to its high resistivity to biodegradation and high toxicity. The photocatalytic degradation of Reactive Blue 4 (RB4), an anthraquinone dye, has been investigated using pure anatase nano titanium (IV) oxide (TiO2). The dye molecules were fully degraded and the addition of hydrogen peroxide (H2O2) enhanced the photodegradation efficiency. It is found that the degradation as the hydroxyl radicals in the bulk solution is sufficient for complete mineralisation. The disappearance of the dye follows pseudo-first-order kinetics. The effect of pH, amount of photocatalyst, UV-light intensity, light source and concentration of hydrogen peroxide was ascertained.
Fulltext Characterization and Performance Evaluation of Cellulose Acetate-Polyurethane Film for Lead II Ion Removal

Iqhrammullah M, Marlina M, Khalil HPSA, Kurniawan KH, Suyanto H, Hedwig R, et al.

Polymers (Basel), 2020 Jun 09;12(6).
PMID: 32526903 DOI: 10.3390/polym12061317

Global pollution from toxic metal waste has resulted in increased research on toxic metal adsorption. A cellulose acetate-polyurethane (CA-PU) film adsorbent was successfully prepared in this research. The cellulose acetate-polyurethane film adsorbent was prepared with a polycondensation reaction between cellulose acetate and methylene diphenyl diisocyanate. The CA-PU bond formation was confirmed by functional group analysis obtained from Fourier transform infrared (FTIR) spectroscopy. The obtained film was characterized for improved tensile and thermal properties with the addition of methylene diphenyl diisocyanate (MDI). The adsorption ability of the obtained film was evaluated with laser-induced breakdown spectroscopy (LIBS). The best film adsorbent from the LIBS was selected and studied for adsorption isotherm. The FTIR analysis confirmed the formation of the CA-PU bond from the polycondensation between cellulose acetate and the methylene diphenyl diisocyanate. The result showed that the addition of methylene diphenyl diisocyanate (MDI) resulted in the urethane network's growth. The characterization result showed an improvement in the morphology, thermal stability, and tensile strength of the film. The LIBS studies showed improvement in the adsorption of Pb2+ with CA-PU compared with the neat CA. The isotherm studies revealed that Pb2+ adsorption by cellulose acetate-polyurethane film adsorbent was heterogeneously dependent on the Freundlich isotherm model (R2 = 0.97044). Overall, the polycondensation method proposed by this study enhanced the Pb2+ removal, and was comparable to those reported in previous studies.
Fulltext Photophysical and electrochemical studies of multinuclear complexes of iron(II) with acetate and extended conjugated N-donor ligands

Abdullah N, Mohd Said S, Marlina A, Roslan MF, Azil A, Nordin AR

ScientificWorldJournal, 2015;2015:860537.
PMID: 25879076 DOI: 10.1155/2015/860537

A dimeric iron(II) complex, trans-[Fe2(CH3COO)4(L1)2] (1), and a trinuclear iron(II) complex, [Fe3(CH3COO)4(H2O)4(L2)] (2), were studied as potential dye-sensitised solar cell materials. The structures of both complexes were deduced by a combination of instrumental analyses and molecular modelling. Variable-temperature magnetic susceptibility data suggested that 1 was made up of 56.8% high-spin (HS) and 43.2% low-spin (LS) Fe(II) atoms at 294 K and has a moderate antiferromagnetic interaction (J=-81.2 cm(-1)) between the two Fe(II) centres, while 2 was made up of 27.7% HS and 72.3% LS Fe(II) atoms at 300 K. The optical band gaps (Eo) for 1 were 1.9 eV (from absorption spectrum) and 2.2 eV (from fluorescence spectrum), electrochemical bandgap (Ee) was 0.83 eV, excited state lifetime (τ) was 0.67 ns, and formal redox potential (E'(FeIII/FeII)) was +0.63 V. The corresponding values for 2 were 3.5 eV (from absorption spectrum), 1.8 eV (from fluorescence spectrum), 0.69 eV, 2.8 ns, and +0.41 V.
Fulltext Comparison of energy and protein adequacy between closed and open enteral nutrition system in critically-ill adult patients [Abstract]

Zheng YL, Norafizah MN, Rosli MS, Marlina MN, Maslina M, Nora Nurlinda Z, et al.

Borneo Journal of Medical Sciences, 2019;2(101):17-18.
MyJurnal

Introduction: Critically-ill patients are commonly fed with EN via open system (OS) or closed system (CS). Several studies showed that patients on CS had received greater volume of EN compared to OS.
Objective: As there was no study conducted in Malaysia, hence this study is conducted to compare the energy and protein adequacy of both systems.
Methodology: This cohort prospective study was conducted in GICU (OS) and NICU/NHDW (CS) in Hospital Kuala Lumpur. Patients aged ≥18 years and fed by feeding pump in OS were included. Patients who were moribund or not given EN were excluded. Patients’ demographic data and disease severity score were collected on day 1 in ICU and followed for 5 days until decease or discharge. Adequacy was determined by percentage of energy/protein received from requirements.
Results: Fifty-five patients were included (25 OS and 30 CS) with mean aged 45.41±17.46 years old, 78.2% male and 65.5% Malay. The mean SAPS II, SOFA score and ICU LOS were 46.47±10.65, 8.60±3.64 and 9.24±7.91 days respectively. The ICU mortality was 20%. EN was started about 2.56±2.89 days after ICU admission and the mean adequacy of energy was 74.56±32.23%, while protein adequacy was and 69.15±35.78%. Compared with the CS, OS were significantly older than CS (51 years old vs 42.5 years old; p=0.035) and had a higher SOFA score (10 vs 7.5; p= 0.014). No difference in ICU LOS and mortality between group were found. Energy (45.64% vs 96.71%; p<0.001) and protein adequacy (38.78% vs 94.12%; p<0.001) were significantly higher in the CS than the OS.
Conclusion: CS as compared with OS may improve nutritional adequacy as CS delivered more 108% energy and 141% protein than OS. The difference in adequacy might be attributed to these factors; feeding method used in the system, patients’ characteristics and condition rather than the feeding system itself.
Keywords: enteral nutrition, critically-ill patients, open system, closed system, adequacy

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