Implementasi Pembelajaran Kontekstual Model React pada Materi Fluida Dinamis untuk Meningkatkan Motivasi Belajar Siswa SMA Kelas XI

This research aimed to find out the improvement of the students motivation learning physic by applying REACT model of Contextual learning.This pre-experimental research used one group pretest and posttest design. There were 35 students of clas XI IPA I SMA Negeri 7 Pekanbaru have participated in this research. We used modification ARCS question one of motivation as instrument in collecting data, before and after treatment. The data were analyzed descriptive by using N-Gain. From the data, we found that N-Gain score in high category for all indicators. And, we can conclude that REACT model have improved students motivation in learning physis especially for class XI IPA I students of SMA Negeri 7 Pekanbaru

Faktor-faktor yang Berhubungan dengan Penggunaan Rokok Elektrik pada Perokok Pemuladi SMA Kota Bekasi

Based on the results of the preliminary survey that conducted by the researcher by spreading questionnaires to 581 High School students in Bekasi resulting 22.3% smoke electronic cigarette with details the active novice smokers who're using electronic cigarette in the amount of 8.3% while about 13.4% where the smokers who used to smoke tobacco cigarette are now moved on to electronic cigarette. The purpose of this research is to analyze the factors that associated with the USAge of electronic cigarette to novice smokers in Bekasi City's High School. The type of this research is descriptive analytic with quantitative approach method. The used research design is cross-sectional study, where the amount of the population in this research is 52 people who are novice electronic smokers in four Bekasi City's High School. The Total of Population technique is used to get the sample for this research where the entire population get the chance to be the sample for the research. Data analysis includes descriptive analysis with the presentation of the frequency distribution table and the analytic analysis uses Chi-Square test to see whether there or not there the relation between respondents' friends' support and family's support with the USAge of electronic cigarette in Bekasi City's High School. Statistical test results show that 67.3% respondents use electronic cigarrete. The variables related with the USAge of electronic cigarette to novice smokers in Bekasi City's High School is the availability of the electronic cigarette (p-value = 0.000), the affordability of the electronic cigarette (p-value = 0.000), and the respondents' friends' support (p-value = 0.016). While the respondents' knowledge about the electronic cigarette (p-vaalue = 0.416), the respondents' attitude to the USAge of the electronic cigarette (p-value = 0.538), the respondents' pocket money (p-value = 1.000) and the family's support (p-value = 0,238) is not related with the USAge of the electronic cigarette to novice smokers in Bekasi City's High School

Chemical characterization and origin of suspended atmospheric particles in Meknes city in Morocco

This work is a study of elemental composition of particulate matter (PM-10, with aerodynamic diameter lower or equalizes to 10 µm, collected in Meknes city in Morocco.The compaigns of measure carried out on a traffic site from March 2007 to April 2008. The chemical concentration of 9 elements (Ca, Cr, Cu, Fe, K, Mn, Ni, Pb and Zn) were determined by Total reflection X-Ray Fluorescence (TXRF), Al was determined by Atomic Absorption Spectrometry (AAS), whereas, the Pb isotopic compositions were determined by Thermo Ionisation Mass Spectrometry (TIMS).the obtained results show quite significant seasonal variation of the chemical composition of fine and coarse fractions. It should be noted that Pb and Ni concentrations exceeded the air quality standars. the calculation of the Enrichment Factor (EF) revealed that Cr and Pb were attributer mainly to anthropogenic sources. The use of the isotopic extraction of lead confirms the anthropic origin of Pb

UTILIZATION OF BLACK SOLDIER FLY’S LARVAE FOR INTEGRATED WASTE MANAGEMENT AT FARMER HOUSEHOLD

In 2021, Indonesia mass-produces as much as 28,649,763.30 million tons of different groups of organic waste. This abundance of waste contributed to releasing methane, a very strong greenhouse gas linked to climate change and directly affects the ecosystems. Degrading waste is crucial so that the landfill does not bear too heavy a burden on waste problems. Some biological agents have been studied as a potential bioconversion of any waste produced by household, industrial, and agricultural fields. This research aims to provide information on the utilization of Hermetia illucens (Black Soldier Fly) as a bioconversion force to diminish waste, particularly in the agricultural field. The larvae known for their high source of protein initiated an integrated-sustainable agricultural system. A conceptual design was performed in this study and the method used was a literature study of secondary data research. The discussion consists of several topics, including the morphology of BSF fly, larval growth media, larval nutritional content based on age, use of larvae for livestock feed, and the concept of integrated waste management that utilizes larva, livestock, fish, and plant cultivation. This study demonstrates that larvae not only serve as a protein source in feed but also as a constituent in the zero-waste agriculture system

ORAI3 (ORAI calcium release-activated calcium modulator 3)

Review on ORAI3 (ORAI calcium release-activated calcium modulator 3), with data on DNA, on the protein encoded, and where the gene is implicated

Quantization rule solution to the Hulth\'en potential in arbitrary dimension by a new approximate scheme for the centrifugal term

The bound state energies and wave functions for a particle exposed to the Hulth\'en potential field in the D-dimensional space are obtained within the improved quantization rule for any arbitrary l state. The present approximation scheme used to deal with the centrifugal term in the effective Hulth\'en potential is systematic and accurate. The solutions for the three-dimensional (D=3) case and the s-wave (l=0) case are briefly discussed. Keywords: Hulth\'en potential, improved quantization rule, approximation schemes. 03.65.Ge, 12.39.JhComment: 15 pages. arXiv admin note: substantial text overlap with arXiv:1009.508

Replication Fork Reversal after Replication–Transcription Collision

Replication fork arrest is a recognized source of genetic instability, and transcription is one of the most prominent causes of replication impediment. We analyze here the requirement for recombination proteins in Escherichia coli when replication–transcription head-on collisions are induced at a specific site by the inversion of a highly expressed ribosomal operon (rrn). RecBC is the only recombination protein required for cell viability under these conditions of increased replication-transcription collisions. In its absence, fork breakage occurs at the site of collision, and the resulting linear DNA is not repaired and is slowly degraded by the RecJ exonuclease. Lethal fork breakage is also observed in cells that lack RecA and RecD, i.e. when both homologous recombination and the potent exonuclease V activity of the RecBCD complex are inactivated, with a slow degradation of the resulting linear DNA by the combined action of the RecBC helicase and the RecJ exonuclease. The sizes of the major linear fragments indicate that DNA degradation is slowed down by the encounter with another rrn operon. The amount of linear DNA decreases nearly two-fold when the Holliday junction resolvase RuvABC is inactivated in recB, as well as in recA recD mutants, indicating that part of the linear DNA is formed by resolution of a Holliday junction. Our results suggest that replication fork reversal occurs after replication–transcription head-on collision, and we propose that it promotes the action of the accessory replicative helicases that dislodge the obstacle

European aerosol phenomenology - 8 : Harmonised source apportionment of organic aerosol using 22 Year-long ACSM/AMS datasets

Organic aerosol (OA) is a key component of total submicron particulate matter (PM1), and comprehensive knowledge of OA sources across Europe is crucial to mitigate PM1 levels. Europe has a well-established air quality research infrastructure from which yearlong datasets using 21 aerosol chemical speciation monitors (ACSMs) and 1 aerosol mass spectrometer (AMS) were gathered during 2013-2019. It includes 9 non-urban and 13 urban sites. This study developed a state-of-the-art source apportionment protocol to analyse long-term OA mass spectrum data by applying the most advanced source apportionment strategies (i.e., rolling PMF, ME-2, and bootstrap). This harmonised protocol was followed strictly for all 22 datasets, making the source apportionment results more comparable. In addition, it enables quantification of the most common OA components such as hydrocarbon-like OA (HOA), biomass burning OA (BBOA), cooking-like OA (COA), more oxidised-oxygenated OA (MO-OOA), and less oxidised-oxygenated OA (LO-OOA). Other components such as coal combustion OA (CCOA), solid fuel OA (SFOA: mainly mixture of coal and peat combustion), cigarette smoke OA (CSOA), sea salt (mostly inorganic but part of the OA mass spectrum), coffee OA, and ship industry OA could also be separated at a few specific sites. Oxygenated OA (OOA) components make up most of the submicron OA mass (average = 71.1%, range from 43.7 to 100%). Solid fuel combustion-related OA components (i.e., BBOA, CCOA, and SFOA) are still considerable with in total 16.0% yearly contribution to the OA, yet mainly during winter months (21.4%). Overall, this comprehensive protocol works effectively across all sites governed by different sources and generates robust and consistent source apportionment results. Our work presents a comprehensive overview of OA sources in Europe with a unique combination of high time resolution (30-240 min) and long-term data coverage (9-36 months), providing essential information to improve/validate air quality, health impact, and climate models.Peer reviewe

Naupliar and Metanaupliar development of Thysanoessa raschii (Malacostraca, Euphausiacea) from Godthåbsfjord, Greenland, with a reinstatement of the ancestral status of the free-living Nauplius in Malacostracan evolution

The presence of a characteristic crustacean larval type, the nauplius, in many crustacean taxa has often been considered one of the few uniting characters of the Crustacea. Within Malacostraca, the largest crustacean group, nauplii are only present in two taxa, Euphauciacea (krill) and Decapoda Dendrobranchiata. The presence of nauplii in these two taxa has traditionally been considered a retained primitive characteristic, but free-living nauplii have also been suggested to have reappeared a couple of times from direct developing ancestors during malacostracan evolution. Based on a re-study of Thysanoessa raschii (Euphausiacea) using preserved material collected in Greenland, we readdress this important controversy in crustacean evolution, and, in the process, redescribe the naupliar and metanaupliar development of T. raschii. In contrast to most previous studies of euphausiid development, we recognize three (not two) naupliar (= ortho-naupliar) stages (N1-N3) followed by a metanauplius (MN). While there are many morphological changes between nauplius 1 and 2 (e.g., appearance of long caudal setae), the changes between nauplius 2 and 3 are few but distinct. They involve the size of some caudal spines (largest in N3) and the setation of the antennal endopod (an extra seta in N3). A wider comparison between free-living nauplii of both Malacostraca and non-Malacostraca revealed similarities between nauplii in many taxa both at the general level (e.g., the gradual development and number of appendages) and at the more detailed level (e.g., unclear segmentation of naupliar appendages, caudal setation, presence of frontal filaments). We recognize these similarities as homologies and therefore suggest that free-living nauplii were part of the ancestral malacostracan type of development. The derived morphology (e.g., lack of feeding structures, no fully formed gut, high content of yolk) of both euphausiid and dendrobranchiate nauplii is evidently related to their non-feeding (lecithotrophic) status