Identifikasi Pemahaman Konsep Tingkat Representasi Makroskopik, Mikroskopik, dan Simbolik pada Materi Ikatan Kimia

Penelitian ini bertujuan untuk mengetahui pemahaman konsep siswa tingkat representasi makroskopik, mikroskopik, dan simbolik pada materi ikatan kimia di SMAT Wira Bhakti Gorontalo. Penelitian ini merupakan penelitian deskriptif kualitatif yang diujikan kepada 57 siswa kelas X SMAT Wira Bhakti Gorontalo. Pengumpulan data menggunakan tes diagnostik tiga tingkat. Level pemahaman siswa dibagi menjadi tiga kategori yaitu paham konsep, tidak paham konsep, dan miskonsepsi, yang terdiri dari tiga tingkat representasi yaitu makroskopik, mikroskopik, dan simbolik. Hasil penelitian menunjukan bahwa pada tingkat representasi makroskopik siswa paham konsep sebesar 9,20%, tidak paham konsep sebesar 23,60%, dan miskonsepsi sebesar 67,20%. Pada tingkat representasi mikroskopik siswa paham konsep sebsar 15,75%, siswa tidak paham konsep sebsar 17%, dan miskonsepsi sebesar 67,25%. Pada tingkat representasi simbolik siswa paham konsep sebsar 7,17%, tidiak paham konsep sebesar 23,17%, dan miskonsepsi sebesar 69,67%. Sehingga dapat ditemukan bahwa ketiga tingkat representasi berada dikategori miskonsepsi dengan kriteria tinggi, yaitu pada makroskopik sebesar 67,20%, mikroskopik sebesar 67,25%, dan simbolik sebesar 69,67%. Sehingga rata-rata totalnya didapatkan sebesar 68,04%. Berdasarkan presentase ditemukan bahwa pengetahuan siswa kelas X SMAT Wira Bhakti Gorontalo termasuk pada kategori miskonsepsi dengan kriteria tinggi

Pelatihan Pembuatan Pestisida Nabati Sebagai Alternatif Pengendalian Serangga Hama Tanaman Pada Petani Sayur di Desa Bulotalangi Timur

This service activity aims to provide training on making vegetable pesticides to farmers and housewives. As an alternative to controlling plant insect pests, the use of vegetable pesticides is considered safe to use. Botanical Pesticides are pesticides whose active ingredients come from plants or herbs and other organic materials which are efficacious in controlling pest attacks on plants. This pesticide does not leave harmful residues on plants or the environment and can be made easily using inexpensive materials and simple equipment. Vegetable pesticides are relatively easy to make with natural or vegetable ingredients which make these pesticides easy to decompose in nature so they don't pollute the environment. This organic pesticide is able to overcome and repel pests that destroy agricultural and plantation crops in general, such as fleas, caterpillars, grasshoppers and so on. The method used is direct training to groups of housewives and vegetable farmers using innovative technology. From the results of the implementation of these activities, the community was very enthusiastic about participating in these activities and was interested in making/producing their own pesticides from materials that are easy to obtain from the surrounding environmen

Deskripsi Keterampilan Generik Sains Siswa dalam Penyelesaian Soal Kimia pada Materi Hidrolisis Garam

Generic science skills are very important for students, in addition to being able to improve students' understanding of concepts, by measuring generic science skills teachers can understand the character and skills possessed by students. This study aims to determine students' generic science skills in solving chemistry problems on salt hydrolysis material by high school students of class XI IPA SMA Muhammadiyah Batudaa. The focus of this study is to describe students' generic science skills in solving chemistry problems on salt hydrolysis material. The method used in this study is a qualitative descriptive research method using tests. The data was obtained through a description test, which was done in writing by 66 students at SMA Muhammadiyah Batudaa. The data that has been obtained will then be analyzed first through the code on the answers given by students, as well as through the scores of each component of the student answers. The results showed the achievement of generic science skills, namely indirect observation 78.41% (good), symbolic language 59.85% (less), law of cause and effect 62.06% (sufficient), logical frame 73.48% (sufficient), logical consistency 64.44% (sufficient). In general, the mastery of generic science skills of grade XI science students of Muhammadiyah Batudaa High School obtained an average percentage of 63.42%, including in the sufficient category

Mutations in GATA2 cause primary lymphedema associated with a predisposition to acute myeloid leukemia (Emberger syndrome).

We report an allelic series of eight mutations in GATA2 underlying Emberger syndrome, an autosomal dominant primary lymphedema associated with a predisposition to acute myeloid leukemia. GATA2 is a transcription factor that plays an essential role in gene regulation during vascular development and hematopoietic differentiation. Our findings indicate that haploinsufficiency of GATA2 underlies primary lymphedema and predisposes to acute myeloid leukemia in this syndrome

Factors influencing success in quality-improvement collaboratives: development and psychometric testing of an instrument

Contains fulltext : 88630.pdf (publisher's version ) (Open Access)ABSTRACT: BACKGROUND: To increase the effectiveness of quality-improvement collaboratives (QICs), it is important to explore factors that potentially influence their outcomes. For this purpose, we have developed and tested the psychometric properties of an instrument that aims to identify the features that may enhance the quality and impact of collaborative quality-improvement approaches. The instrument can be used as a measurement instrument to retrospectively collect information about perceived determinants of success. In addition, it can be prospectively applied as a checklist to guide initiators, facilitators, and participants of QICs, with information about how to perform or participate in a collaborative with theoretically optimal chances of success. Such information can be used to improve collaboratives. METHODS: We developed an instrument with content validity based on literature and the opinions of QIC experts. We collected data from 144 healthcare professionals in 44 multidisciplinary improvement teams participating in two QICs and used exploratory factor analysis to assess the construct validity. We used Cronbach's alpha to ascertain the internal consistency. RESULTS: The 50-item instrument we developed reflected expert-opinion-based determinants of success in a QIC. We deleted nine items after item reduction. On the basis of the factor analysis results, one item was dropped, which resulted in a 40-item questionnaire. Exploratory factor analysis showed that a three-factor model provided the best fit. The components were labeled 'sufficient expert team support', 'effective multidisciplinary teamwork', and 'helpful collaborative processes'. Internal consistency reliability was excellent (alphas between .85 and .89). CONCLUSIONS: This newly developed instrument seems a promising tool for providing healthcare workers and policy makers with useful information about determinants of success in QICs. The psychometric properties of the instrument are satisfactory and warrant application either as an objective measure or as a checklist

The Effect of Project Based Learning with Fhotonovela to Ability Student in Solve Problem Warming Global

This study is a quantitative study that aims to see whether there is an effect on the problem solving abilities of students who are taught by a project-based learning model with photonovelas media on global warming materials. this study used in this study was a multiple choice test to measure students’ problem solving abilities. The population taken in this study was seventh grade students of SMP Negeri Bongomeme. The sample used was 50 students, namely, 26 students in the experimental class and 24 students in the control class. The analysis used in this study uses Rasch modeling SPSS 16.0 applications, namely hypothesis testing with the Wilcoxon test. Introductio

Impact of intravascular ultrasound on chronic total occlusion percutaneous revascularization

Aim: We sought to investigate the impact of IVUS use on chronic total occlusion (CTO) PCI using data from a contemporary registry of consecutive patients and applying a propensity score matching analysis. Methods and results: We evaluated 514 successful CTO-PCIs, median age: 67 years (IQR: 58–73), 83.5% males. IVUS-guided PCI was performed in 184 (35.8%) of cases. After using 1:1 propensity matching score analysis, two groups of 182 patients each (IVUS-guided vs. angiography-guided CTO-PCI group) were produced to form the study population. In the IVUS-guided group the median maximum stent diameter was larger and the median total stented segment was longer compared to the angiography-guided group [(3.5 mm, IQR: 3.0–4.0 vs. 3.2 mm, IQR: 3.0–3.5, p < 0.001) and (60.0 mm, IQR: 38.0–91.3 vs. 38.0 mm, IQR: 32.0–70.5, p < 0.001), respectively]. In the IVUS-guided group, retrograde recanalization was more frequently encountered compared to the angiography-guided PCI group (30.2% vs. 20.9%, p = 0.04). Procedural time was significantly longer in the IVUS-guided group, without any difference in fluoroscopy time, radiation dose and contrast volume. Multivariate linear regression analysis showed that IVUS use was the strongest independent factor associated with larger maximum diameter stents (p < 0.001) and a strong independent predictor for total stented segment length during CTO-PCI (p < 0.001). Up to 8 years follow-up, there was no difference in the incidence of the composite endpoint of all-cause death, cardiac death, myocardial infarction and target vessel revascularization between the IVUS-guided PCI and the angiography-guided PCI groups (hazard ratio: 13.7% vs. 15.9%, respectively, log-rank: p = 0.67, median follow-up time: 49.0 months, IQR: 33.0–67.0). Conclusions: Use of IVUS in CTO-PCI was associated with larger stent diameter and longer stented segments. Despite more frequent use of IVUS in retrograde CTO-PCI, there was no difference in long-term adverse events between IVUS and angiography CTO-PCI groups; nevertheless, the study was not powered to assess clinical outcomes