Kaji Eksperimental Pemanfaatan Material Penyimpan Panas Pada Kolektor Pemanas Air Surya

Pada penelitian telah dilakukan pengujian pemanfaatan material berubah fasa sebagai material penyimpan panas yang diletakkan menyatu dalam kolektor. Kolektor yang digunakan adalah plat datar berkuran 160 cm x 100 cm x 10 cm. Sebagai material penyimpan panas digunakan lilin parafin. Dari hasil pengujian menunjukkan sistem pemanas air yang dirancang dan dibuat pada penelitian mampu menaikkan temperatur air sampai 60 oC pada kondisi hari cerah. Penggunaan material penyimpan panas mampu mempertahankan temperatur air pada 40-45 oC sampai jam 20:00 malam, dari hasil penelitian ini dapat disimpulkan bahwa penempatan lilin parafin sebagai material penyimpan panas menyatu dalam kolektor akan mampu meningkatkan efisiensi sistem pemanas air surya

Upacara tradisional (upacara kematian) Daerah Istimewa Aceh

Aneka ragam upacara yang dikembangkan di kalangan masyarakat termasuk masyarakat Aceh, pada dasarnya dapat dibagi ke dalam dua katagori. Katagori pertama merupakan upacara lintasan hidup (individual life cycle), dan katagori yang kedua merupakan upacara merawut (ritual of aflication). Katagori yang pertama merupakan upacara yang diselenggarakan untuk menandakan peristiwa perkembangan fisik maupun sosial seseorang mulai dari dalam kandungan sampai ia mengalami kematian. Katagori ini ditandai oleh perpindahan dari suatu fase kehidupan kepada fase lain atau dari satu status ke lain status sosial. Perpindahan status kepada kematian menjadi pokok perhatian dalam penelitian ini. Peristiwa kematian yang dialami oleh sesuatu keluarga akan mempunyai dampak sosial yang lebih luas, karena menyangkut soal penerusan keturunan, warisan kekayaan dan kedudukan sosial dalam masyarakat. Ruang lingkup materi penelitian ini, meliputi semua upacara tradisional yang berkaitan dengan kematian. Dan ruang lingkup operasional penelitian meliputi tiga suku bangsa di Aceh yaitu suku bangsa Aneuk Jamee, suku bangsa Aceh, dan suku bangsa Alas. Sedangkan suku bangsa lainnya tidak sempat diteliti pada kesempatan ini seperti suku bangsa Gayo, suku bangsa Tamiang, suku bangsa Simeulu, suku bangsa Kluet, dan suku bangsa Singkil

Sistim gotong royong dalam masyarakat pedesaan Propinsi Daerah Istimewa Aceh

Sistem gotong-royong merupakan suatu hal yang bertambah penting, apalagi kalau diingat bahwa generasi muda Indonesia nanti akan mengetahui bagaimana mereka dari generasi yang lalu mengembangkan dan membina nilai-nilai luhur yang terpancar dari unsur budaya mereka. Buku ini memuat berbagai informasi yang tumbuh dan berkembang dalam masyarakat tempo dulu mengenai sistim gotong royong dalam masyarakat pedesaan Propinsi Daerah Istimewa Aceh

Subclinical hypothyroidism among patients with depressive disorders

Subclinical hypothyroidism (SHT) is a biochemical diagnosis, defined as an elevated Thyroid Stimulating Hormone (TSH) with normal free thyroxine (FT4). It affects 4-10% of the adult population and is more prevalent in elderly women. Its commonest cause is autoimmune thyroiditis, detected by anti-thyroid peroxidase antibody (TPO-Ab). About 2-5% of SHT patients progress to overt hypothyroidism annually. The SHT prevalence among depressed patients ranges between 3% and 17%. This study aimed to determine the prevalence of SHT and TPO-Ab positivity among patients diagnosed with depressive disorders. It was a cross-sectional study carried out in the Universiti Kebangsaan Malaysia Medical Centre over a 12 months period. Serum TSH, FT4 and TPO-Ab were measured. Results showed that 82% of depressed patients were euthyroid, 4% had SHT, 11% had subclinical hyperthyroidism and 2% had discordant thyroid function. TPO-Ab positivity among the subjects was 7%, one of whom had SHT. In conclusion, the prevalence of SHT and TPO-Ab positivity in the study population, at 4% and 7%, respectively, were comparable to previous findings

Pemukiman sebagai kesatuan ekosistem daerah istimewa aceh

Buku ini berisi tentang pemukiman sebagai kesatuan ekosistem di daerah istimewa aceh yang meliputi gambaran umum pedesaan dan desa sebagai ekosistem

Copper-dolomite as effective catalyst for glycerol hydrogenolysis to 1,2-propanediol

A series of Cu/dolomite catalysts were synthesized using the impregnation technique, characterized using NH3–TPD, FTIR-Pyridine, XRD, H2-TPR, BET, BJH, FESEM-EDX, and XPS techniques and evaluated in glycerol hydrogenolysis into 1,2-propanediol (1,2-PDO). Remarkably, dolomite support exhibited high acidity, which is, to our knowledge the first acid characteristic revealed among the reported literatures. By doping copper on dolomite support, the acid amount and strength of the catalyst increased. N2O chemisorption analysis suggests that the metallic copper species were well dispersed on dolomite support while the copper surface area increased with copper loading. The formation of metallic copper on dolomite support agreed well with findings derived from XRD and XPS analysis. According to the results of XPS and H2-TPR, metallic copper species were enriched on the grain surfaces of dolomite and not in the bulk. The addition of copper to dolomite ameliorates the redox properties of the catalysts, owing to the reduction at a lower temperature than that of pure CuO and dolomite support. From the catalytic results, 20 wt% Cu/dolomite was the most active catalyst by giving 100% glycerol conversion and 92% selectivity toward 1,2-PDO at 180 ºC, 2 MPa H2 in 6 h reaction time

Default mode network perturbations in Alzheimer's disease: an fMRI study in Klang Valley, Malaysia

The default mode network (DMN) is a large neural network that has a significant correlation with Alzheimer's disease (AD). Grey matter volume (GMV) and functional connectivity (FC) involving the regions of the DMN have been noted to differ significantly between AD and healthy older adults. Nevertheless, there is a paucity of data on the structural and functional changes in the DMN of AD patients in Malaysia. We conducted a cross-sectional study in Klang Valley, Malaysia, to evaluate AD subjects compared to healthy controls (HC) using a resting-state functional MRI (rs-fMRI) experiment. We recruited 22 subjects (AD=11, HC=11) and conducted neuropsychological tests such as the Montreal Cognitive Assessment (MoCA), Mini Mental State Examination (MMSE), and Clinical Dementia Rating (CDR). The subjects then underwent rs-fMRI scans, and subsequently, we quantitatively analysed the GMV by Voxel based Morphometry (VBM) using the structural data. We also utilised the CONN toolbox on Statistical Parametric Mapping (SPM) software to evaluate the FC and activation of the nodes of the DMN. In comparison with the HC group, the AD group demonstrated a reduction in GMV in the right and left inferior temporal gyrus, left superior frontal gyrus, right superior frontal gyrus medial segment, right gyrus rectus, right temporal lobe, left putamen, and right precuneus. Moreover, there was a significant decrease in the FC of the nodes of the DMN noted on rs-fMRI (cluster-size corrected p<0.05). In particular, the precuneus and anterior cingulate cortex had decreased FC in AD compared to HC. Hence, structural and resting-state fMRI can detect distinct imaging biomarkers of AD based on GMV and DMN functional connectivity profiles. This tool can be used as a non-invasive tool for improving the feature detection and diagnosis of AD in the Malaysian population

The impact of surgical delay on resectability of colorectal cancer: An international prospective cohort study

AIM: The SARS-CoV-2 pandemic has provided a unique opportunity to explore the impact of surgical delays on cancer resectability. This study aimed to compare resectability for colorectal cancer patients undergoing delayed versus non-delayed surgery. METHODS: This was an international prospective cohort study of consecutive colorectal cancer patients with a decision for curative surgery (January-April 2020). Surgical delay was defined as an operation taking place more than 4 weeks after treatment decision, in a patient who did not receive neoadjuvant therapy. A subgroup analysis explored the effects of delay in elective patients only. The impact of longer delays was explored in a sensitivity analysis. The primary outcome was complete resection, defined as curative resection with an R0 margin. RESULTS: Overall, 5453 patients from 304 hospitals in 47 countries were included, of whom 6.6% (358/5453) did not receive their planned operation. Of the 4304 operated patients without neoadjuvant therapy, 40.5% (1744/4304) were delayed beyond 4 weeks. Delayed patients were more likely to be older, men, more comorbid, have higher body mass index and have rectal cancer and early stage disease. Delayed patients had higher unadjusted rates of complete resection (93.7% vs. 91.9%, P = 0.032) and lower rates of emergency surgery (4.5% vs. 22.5%, P < 0.001). After adjustment, delay was not associated with a lower rate of complete resection (OR 1.18, 95% CI 0.90-1.55, P = 0.224), which was consistent in elective patients only (OR 0.94, 95% CI 0.69-1.27, P = 0.672). Longer delays were not associated with poorer outcomes. CONCLUSION: One in 15 colorectal cancer patients did not receive their planned operation during the first wave of COVID-19. Surgical delay did not appear to compromise resectability, raising the hypothesis that any reduction in long-term survival attributable to delays is likely to be due to micro-metastatic disease

Biogas production through co-digestion of palm oil mill effluent with cow manure

Palm oil mill effluent (POME) and cow manure (CM) are excellent substrates for biogas production. Biogas production potentials from POME and CM as a single substrate were extensively researched by many researchers. In this work, the biogas potentials from POME and CM as a single substrate as well as co-substrates were investigated. In addition, the effect of removal efficiencies of chemical oxygen demand (COD) and volatile solids (VS) towards biogas production and its methane content were also investigated. Batch anaerobic digesters used for the digestion were operated at ambient temperature (28oC to 34°C) for 21 days. The digesters were operated at different mixing ratios. Maximum cumulative biogas yield and its methane content were obtained as 1875ml and 61.13%, respectively in the mixture containing 70: 30 (POME: CM). Co-digestion of 70% POME + 30% CM improved the removal efficiency up to 75% (COD) and 68% (VS). Biogas yield from digesters D3, D4 and D5 were improved by 21%, 162% and 110% v/v using the codigestion as compared to the digestion of POME alone and 95%, 323% and 240% v/v as compared to the digestion of CM alone respectively. These results show that biogas and its methane content production can be enhanced efficiently through co-digestion process

KITLV- Pemukiman Sebagai Kesatuan Ekosistem Daerah Istimewa Aceh

xi, 85 hal; Ilust; Tabe