Pengaruh Ekstrak Temulawak (Curcuma Xanthorrhiza Roxb.) terhadap Kadar Glukosa Darah Tikus Wistar yang Diinduksi Aloksan

Latar Belakang: Temulawak merupakan tanaman tropis Indonesia yangkandungan metabolit sekunder dalam rimpangnya diduga dapatmenurunkan kadar glukosa darah. Tujuan: Penelitian ini bertujuan untukmengetahui efek ekstrak temulawak terhadap kadar glukosa darah tikuswistar yang diinduksi aloksan dan dibandingkan dengan metformin.Metodologi: Penelitian eksperimental ini menggunakan metode pretestand posttest control group design. Temulawak diekstrak dengan pelarutetanol 96% menggunakan metode maserasi. Sebanyak tiga puluh ekortikus wistar diaklimasi dan diberi diet tinggi protein selama tujuh hari. Tikusdibagi secara acak ke dalam enam kelompok perlakuan, yaitu kontrolnormal dan negatif (CMC 0,5%), kontrol positif (metformin 63 mg/kgBB),dosis I (4,375 mg/kgBB), dosis II (8,75 mg/kgBB) dan dosis III (17,5mg/kgBB). Induksi aloksan dosis 155 mg/kgBB diberikan pada semuakelompok kecuali kontrol normal secara intraperitoneal. Kadar glukosadarah puasa diukur empat kali yaitu sebelum dan setelah induksi aloksan,serta setelah tujuh dan empat belas hari perlakuan menggunakan metodeGOD-PAP dengan spektrofotometer. Data dianalisis menggunakan ujiOne Way Anova, dilanjutkan dengan uji Post-Hoc LSD. Hasil: Skriningfitokimia menunjukkan ekstrak temulawak mengandung fenol, flavonoid,alkaloid, tanin, triterpenoid dan glikosida. Hasil analisa menunjukkanperbedaan bermakna nilai rerata kadar glukosa darah antara kelompokkontrol negatif dengan kelompok kontrol normal dan positif, serta ketigadosis ekstrak temulawak (p<0,05) setelah tujuh dan empat belas hariperlakuan. Kesimpulan: Ketiga dosis ekstrak temulawak dapatmenurunkan kadar glukosa darah tikus putih wistar yang diinduksialoksan. Ekstrak temulawak pada dosis III (17,5 mg/kgBB) samaefektifnya dengan metformin dalam menurunkan kadar glukosa darah

UJI AKTIVITAS PENURUNAN KADAR ASAM URAT EKSTRAK ETANOL BUAH PARE (Momordica charantia L.) PADA TIKUS PUTIH JANTAN (Rattus norvegicus) YANG DIINDUKSI KAFEIN

ABSTRACTBitter melon fruit (Momordica charantia L.) is one of the plants that contains flavonoid compound supposedly as anti-hyperuricemic activity. This study aims to determine the potential activity of reducing uric acid levels from the ethanol extract of bitter melon fruit (Momordica charantia L.) on white wistar male rats (Rattus norvegicus) induced with caffeine. This study is a laboratory experiment using a complete randomized design. A total of 15 rats were divided into 5 groups : negative control (CMC 1%), positive control (Allopurinol), and treatment group of bitter melon fruit (Momordica charantia L.) extract 0,9 mg, 1,8 mg, and 3,6 mg. Hyperuricemic condition was induced by oral administration of  27 mg/200 gr caffeine for 6 days. The uric acid levels was measured before the rats was induced, 6 days after induced and every 3 days of 9 days of treatment. The data obtained were analyzed by ANOVA (Analisis of Variance) and LSD (Least Significant Different). The results show that the dose group of the ethanol extrack of bitter melon fruit had comparable with positive control of Allopurinol in decrease uric acid levels. The conclusion was the ethanol extract of bitter melon fruit (Momordica charantia L.) had anti-hyperuricemic activity in male white rats (Rattus norvegicus) dose 0,9 mg, 1,8 mg and 3,6 mg. Keywords  : Momordica charantia L., antihiperuricemia, Rattus norvegicus, caffeine.ABSTRAK Buah pare (Momordica charantia L.) adalah salah satu tanaman yang mengandung flavonoid yang diduga sebagai senyawa yang mempunyai aktivitas antihiperurisemia. Penelitian ini bertujuan untuk mengetahui potensi aktivitas penurunan kadar asam urat dari ekstrak etanol buah pare pada tikus putih jantan galur wistar (Rattus norvegicus). Jenis penelitian ini ialah eksperimen laboratorium menggunakan Rancangan Acak Lengkap. Sebanyak 15 ekor tikus dibagi dalam 5 kelompok perlakuan : kontrol negatif (CMC 1%), kontrol positif (Allopurinol), dan kelompok dosis uji yaitu pemberian ekstrak etanol buah pare 0,9 mg/200 gr BB; 1,8 mg/200 gr BB; 3,6 mg/200 gr BB. Induksi hiperurisemia dilakukan dengan kafein dosis 27 mg/200 gr selama 6 hari. Pengukuran kadar asam urat dilakukan sebelum induksi, 6 hari setelah diinduksi dan setiap 3 hari selama 9 hari perlakuan. Data yang diperoleh kemudian dianalisis secara statistik menggunakan ANOVA (Analysis of Variance) dan LSD (Least Significant Different). Hasil penelitian menunjukkan bahwa kelompok dosis ekstrak etanol buah pare memiliki aktivitas yang sebanding dengan kontrol positif allopurinol dalam menurunkan kadar asam urat. Kesimpulannya ekstrak etanol buah pare (Momordica charantia L.) memiliki aktivitas antihiperurisemia pada tikus putih jantan (Rattus norvegicus) pada dosis 0,9 mg/200 gr BB; 1,8 mg/200 gr BB; 3,6 mg/200 gr BB. Kata kunci : Momordica charantia L., antihiperurisemia, Rattus norvegicus, kafein

Heralded Noiseless Amplification of a Photon Polarization Qubit

Non-deterministic noiseless amplification of a single mode can circumvent the unique challenges to amplifying a quantum signal, such as the no-cloning theorem, and the minimum noise cost for deterministic quantum state amplification. However, existing devices are not suitable for amplifying the fundamental optical quantum information carrier, a qubit coherently encoded across two optical modes. Here, we construct a coherent two-mode amplifier, to demonstrate the first heralded noiseless linear amplification of a qubit encoded in the polarization state of a single photon. In doing so, we increase the transmission fidelity of a realistic qubit channel by up to a factor of five. Qubit amplifiers promise to extend the range of secure quantum communication and other quantum information science and technology protocols.Comment: 6 pages, 3 figure

Utility of neutrophil Fcgamma receptor I (CD64) index as a biomarker for mucosal inflammation in pediatric Crohn\u27s disease

BACKGROUND: Neutrophil expression of the Fcgamma receptor I (CD64) is upregulated in adult patients with clinically active inflammatory bowel disease (IBD). We tested the relationship of CD64 with mucosal inflammation and clinical relapse in pediatric Crohn\u27s disease (CD). METHODS: In a cohort of 208 newly diagnosed CD and 43 non-IBD controls, ileal expression of FcgammaRI/S100A9 was determined by RNA sequencing from biopsies obtained at ileocolonoscopy. In a second cohort, we tested for the peripheral blood polymorphonuclear neutrophil (PMN) CD64 index from 26 newly diagnosed CD, 30 non-IBD controls, and 83 children with established CD. RESULTS: Ileal FcgammaRIA mRNA expression was significantly elevated in CD at diagnosis compared with non-IBD controls (P \u3c 0.001), and correlated with ileal S100A9 (calprotectin) expression (r = 0.83, P \u3c 0.001). The median (range) PMN CD64 index for newly diagnosed CD was 2.3 (0.74-9.3) compared with 0.76 (0.39-1.2) for non-IBD controls (P \u3c 0.001) with 96% sensitivity and 90% specificity at the cut point of 1.0. The PMN CD64 index significantly correlated with mucosal injury as measured by the simple endoscopic score for CD (r = 0.62, P \u3c 0.001). Patients with CD in clinical remission receiving maintenance therapy with a PMN CD64 index1.0 (P \u3c 0.01). CONCLUSIONS: An elevated PMN CD64 index is associated with both mucosal inflammation and an increased risk for clinical relapse in pediatric CD. The PMN CD64 index is a reliable marker for sustained remission in patients with CD receiving maintenance therapy

Observation of time-reversal symmetry breaking in the band structure of altermagnetic RuO2_2

Altermagnets are an emerging third elementary class of magnets. Unlike ferromagnets, their distinct crystal symmetries inhibit magnetization while, unlike antiferromagnets, they promote strong spin polarization in the band structure. The corresponding unconventional mechanism of timereversal symmetry breaking without magnetization in the electronic spectra has been regarded as a primary signature of altermagnetism, but has not been experimentally visualized to date. We directly observe strong time-reversal symmetry breaking in the band structure of altermagnetic RuO$_2$ by detecting magnetic circular dichroism in angle-resolved photoemission spectra. Our experimental results, supported by ab initio calculations, establish the microscopic electronic-structure basis for a family of novel phenomena and functionalities in fields ranging from topological matter to spintronics, that are based on the unconventional time-reversal symmetry breaking in altermagnets

The CECAM Electronic Structure Library and the modular software development paradigm

First-principles electronic structure calculations are very widely used thanks to the many successful software packages available. Their traditional coding paradigm is monolithic, i.e., regardless of how modular its internal structure may be, the code is built independently from others, from the compiler up, with the exception of linear-algebra and message-passing libraries. This model has been quite successful for decades. The rapid progress in methodology, however, has resulted in an ever increasing complexity of those programs, which implies a growing amount of replication in coding and in the recurrent re-engineering needed to adapt to evolving hardware architecture. The Electronic Structure Library (\esl) was initiated by CECAM (European Centre for Atomic and Molecular Calculations) to catalyze a paradigm shift away from the monolithic model and promote modularization, with the ambition to extract common tasks from electronic structure programs and redesign them as free, open-source libraries. They include ``heavy-duty'' ones with a high degree of parallelisation, and potential for adaptation to novel hardware within them, thereby separating the sophisticated computer science aspects of performance optimization and re-engineering from the computational science done by scientists when implementing new ideas. It is a community effort, undertaken by developers of various successful codes, now facing the challenges arising in the new model. This modular paradigm will improve overall coding efficiency and enable specialists (computer scientists or computational scientists) to use their skills more effectively. It will lead to a more sustainable and dynamic evolution of software as well as lower barriers to entry for new developers

Multi-agent systems in epidemiology: a first step for computational biology in the study of vector-borne disease transmission

<p>Abstract</p> <p>Background</p> <p>Computational biology is often associated with genetic or genomic studies only. However, thanks to the increase of computational resources, computational models are appreciated as useful tools in many other scientific fields. Such modeling systems are particularly relevant for the study of complex systems, like the epidemiology of emerging infectious diseases. So far, mathematical models remain the main tool for the epidemiological and ecological analysis of infectious diseases, with SIR models could be seen as an implicit standard in epidemiology. Unfortunately, these models are based on differential equations and, therefore, can become very rapidly unmanageable due to the too many parameters which need to be taken into consideration. For instance, in the case of zoonotic and vector-borne diseases in wildlife many different potential host species could be involved in the life-cycle of disease transmission, and SIR models might not be the most suitable tool to truly capture the overall disease circulation within that environment. This limitation underlines the necessity to develop a standard spatial model that can cope with the transmission of disease in realistic ecosystems.</p> <p>Results</p> <p>Computational biology may prove to be flexible enough to take into account the natural complexity observed in both natural and man-made ecosystems. In this paper, we propose a new computational model to study the transmission of infectious diseases in a spatially explicit context. We developed a multi-agent system model for vector-borne disease transmission in a realistic spatial environment.</p> <p>Conclusion</p> <p>Here we describe in detail the general behavior of this model that we hope will become a standard reference for the study of vector-borne disease transmission in wildlife. To conclude, we show how this simple model could be easily adapted and modified to be used as a common framework for further research developments in this field.</p

Energetic, spatial and momentum character of a buried interface: the two-dimensional electron gas between two metal oxides

The interfaces between two condensed phases often exhibit emergent physical properties that can lead to new physics and novel device applications, and are the subject of intense study in many disciplines. We here apply novel experimental and theoretical techniques to the characterization of one such interesting interface system: the two-dimensional electron gas (2DEG) formed in multilayers consisting of SrTiO$_3$ (STO) and GdTiO$_3$ (GTO). This system has been the subject of multiple studies recently and shown to exhibit very high carrier charge densities and ferromagnetic effects, among other intriguing properties. We have studied a 2DEG-forming multilayer of the form [6 unit cells STO/3 unit cells of GTO]$_{20}$ using a unique array of photoemission techniques including soft and hard x-ray excitation, soft x-ray angle-resolved photoemission, core-level spectroscopy, resonant excitation, and standing-wave effects, as well as theoretical calculations of the electronic structure at several levels and of the actual photoemission process. Standing-wave measurements below and above a strong resonance have been introduced as a powerful method for studying the 2DEG depth distribution. We have thus characterized the spatial and momentum properties of this 2DEG with unprecedented detail, determining via depth-distribution measurements that it is spread throughout the 6 u.c. layer of STO, and measuring the momentum dispersion of its states. The experimental results are supported in several ways by theory, leading to a much more complete picture of the nature of this 2DEG, and suggesting that oxygen vacancies are not the origin of it. Similar multi-technique photoemission studies of such states at buried interfaces, combined with comparable theory, will be a very fruitful future approach for exploring and modifying the fascinating world of buried-interface physics and chemistry.Comment: 34 pages, 10 figure