Studi Arus Dan Sebaran Sedimen Dasar Di Perairan Teluk Ujungbatu Kabupaten Jepara

Perairan Teluk Ujungbatu Kabupaten Jepara merupakan pantai yang rentan terhadap proses erosi dan sedimentasi yang disebabkan karena faktor fisik ataupun sifat dari material sedimen. Untuk mengetahui kecepatan dan arah arus yang selalu berlawanan arah setiap tahun sehingga dapat mempengaruhi sebaran sedimen dasar di sekitar pantai, diperlukan beberapa analisa mengenai kondisi arus dan pola sebaran sedimen dasar di perairan Teluk Unjung Batu. Tujuan dari penelitian ini adalah untuk mengetahui kecepatan dan arah arus serta sebaran sedimen dasar di perairan Teluk Ujungbatu Kabupaten Jepara. Penelitian ini dilakukan 2 tahap, pengumpulan data lapangan dan pengolahan data. Pengumpulan data lapangan yang meliputi pengukuran dan pengambilan data arus, pasang surut, dan sedimen dasar pada tanggal 17 Februari – 5 Maret 2014, serta proses pengolahan data yang dilaksanakan di LaboratoriumOseanografi Tropis Jurusan Ilmu Kelautan tanggal 8 – 11 Maret 2014. Teknik pengambilan sampel sedimen menggunakan metode sampling purposive method (Grab sampler), untuk pengambilan data arus dan pasang surut menggunakan metode Euler ADCP (Accoustic Doppler Profiler) dan Palem pasut. Berdasarkan analisis data, diperoleh bahwa kecepatan arus rata-rata berkisar antara 1,77cm/s - 4,55 cm/s dengan arah dominan menuju Barat dan Barat Laut. Kecepatan rata-rata pada kolom air permukaan adalah 5,8 cm/s, kolom air tengah 4,26 cm/s, dan kolom air dasar 3.51 cm/s. Pola pergerakan arus dominan dipengaruhi oleh arus pasang surut. Sebaran sedimen dasar di perairan Teluk Ujungbatu dipengaruhi oleh masukan sedimen dari Sungai Wiso dan Sungai Mati, sehingga ukuran partikel sedimen dasar di perairan Teluk tersebut didominasi oleh pasir

Studi Karakteristik Selai Kolang Kaling Markisa dengan Penambahan Pewarna Angkak

Pengolahan selai dengan bahan baku kolang kaling dan buah markisa akan memberikan warna selai yang kurang menarik. Pigmen angkak dapat dijadikan alternatif pewarna alami yang baik dan cukup stabil dimana juga dapat meningkatkan aktivitas antioksidan pada produk. Penelitian ini bertujuan untuk mengetahui pengaruh penambahan dan konsentrasi yang tepat  bubuk angkak terhadap karakteristik selai kolang kaling  markisa. Penelitian dilakukan menggunakan  rancangan acak lengkap (RAL) dengan 5 perlakuan dan 3 kali ulangan. Perlakuan tersebut adalah penambahan bubuk angkak yaitu : A (tanpa (0%)), B (1%), C (2%), D (3%) dan E (4%). Data dianalisis secara statistik dengan menggunakan analisis of varian (ANOVA) dan dilanjutkan dengan Duncan New Multiple Range Test (DNMRT) pada taraf  5%. Hasil penelitian memperlihatkan bahwa  penambahan angkak memberikan  hasil berpengaruh nyata pada hampir semua parameter karakteristik selai yang dianalisis. Penambahan bubuk angkak 1%  (B) merupakan perlakuan terbaik berdasarkan analisis sensori dengan karakteristik sebagai berikut :  kadar air  28,18%, ohue 11,99, aktivitas antioksidan 20,58%  (pada konsentrasi 100.000 ppm), pH 3,65, total padatan terlarut 59,33%, kadar sakarosa 55,42%,  angka lempeng total 1,0 x103 cfu/g dan lovastatin 3,09 ppm

Kajian Kerentanan Bencana Tsunami Di Pesisir Kabupaten Kulon Progo Provinsi D. I. YOGYAKARTA

Coastal of Kulon Progo Regency is located in the southern coastal area of Java island that potentially vulnerable to tsunami disaster because of its geographical position that directly opposite the Indian Ocean and the meeting place of two tectonic plates, the Eurasian plate and the Indo- Australian plate which is tectonically very active and can be tsunami source. Identification of tsunami vulnerable areas in Kulon Progo Regency is a disaster mitigation step to minimize the negative impact of the tsunami. The purpose of this research is to map the vulnerability of the environment to the tsunami in Kulon Progo Regency coastal. There are five classes of tsunami vulnerabilities in Kulon Progo Regency coastal is the particularly vulnerable class 7.77 km2, 19.82 km2 vulnerable class, the class is quite vulnerable 33.98 km2, 51.38 km2 less vulnerable class, and the class is not vulnerable 31.19 km2 . The area included in very susceptible and vulnereable class in the village of Glagah, Jangkaran, Karang Sewu, Banaran, Sindutan, Palihan, Garongan, Pleret, and Bugel. The class are quit vulnerable, less vulnerable, and not vulnerable include around the village areas of reserarch in Galur, Panjatan, Wates, and Temon district

Pengaruh Arus Terhadap Sebaran Sedimen Tersuspensi Di Muara Sungai Silugonggo Kabupaten Pati

Sedimen tersuspensi adalah material organik maupun anorganik yang melayang di dalam kolom air sebelum mengalami pengendapan ke dasar perairan. Sedimen tersuspensi dapat memicu pencemaran akibatnya yaitu terjadinya kekeruhan di perairan tersebut. Arus sebagai salah satu parameter hidro-oseanografi memiliki peran aktif terhadap sebaran sedimen tersuspensi. Arus mengakibatkan sedimen yang telah mengalami pengendapan kembali terangkat ke kolom perairan akibat dari proses turbulensi. Hal ini mengakibatkan konsentrasi sedimen tersuspensi meningkat. Penelitian ini bertujuan untuk mengetahui nilai konsentrasi sedimen tersuspensi dan pola sebaran konsentrasi sedimen tersuspensi yang dipengaruhi oleh arus yang terjadi di Muara Sungai Silugonggo Kabupaten Pati. Metode penelitian yang digunakan merupakan metode kuantitatif karena data penelitian berupa angka dan analisa menggunakan statistik atau model. Hasil penelitian menunjukkan nilai konsentrasi sedimen tersuspensi di Muara Sungai Silugonggo ketika menuju pasang pada kedalaman 0.2d antara 0.008-0.201 g/ml, 0.6d antara 0.016- 0.151 g/ml, dan 0.8d antara 0.033-0.637 g/ml. Nilai konsentrasi sedimen tersuspensi ketika menuju surut pada kedalaman 0.2d antara 0.016-0.125 g/ml, 0.6d antara 0.025- 0.145 g/ml, dan 0.8d antara 0.041- 0.174 g/ml. Hasil pengamatan arus menunjukkan arah arus dominan menuju barat laut. Kesimpulan dari penelitian ini yaitu kecepatan dan arah arus yang terjadi mempengaruhi pola sebaran sedimen tersuspensi di Muara Sungai Silugonggo, Kabupaten Pati

Poor sleep quality may independently predict suicidal risk in COVID-19 survivors: a 2-year longitudinal study

Objective: Multiple symptoms of psychiatric, neurological, and physical illnesses may be part of Post-COVID conditions and may pose COVID-19 survivors a high suicidal risk. Accordingly, we aimed to study factors contributing to suicidal risk in Post COVID-19 patients. Method: Consecutive patients with post COVID-19 conditions were followed for 2 years at the University Hospital of Ferrara at baseline (T0), 6 (T1), 12 (T2), and 24 (T3) months. Demographics, and clinical data for all patients included: disease severity, hospital length of stay, comorbidity, clinical complications, sleep quality, cognitive complaints, anxiety and stress-related symptoms, depressive symptoms, and suicidal ideation. Results: The final sample included 81 patients with post COVID survivors. The mean age was 64 + 10,6 years, 35,8% were females, 65,4% had medical comorbidities, and 69,1% had WHO severe form of COVID forms. At T0 more than 90% of patients showed poor sleep quality, 59.3% reported moderate/severe depressive symptoms, and 51.% experienced anxiety, 25.9% experienced post-traumatic stress symptoms. At T0 suicidal ideation, interested 6.1% and at T3 it increased to 7.4%. In the regression analysis, suicidal ideation at baseline was best predicted by poor sleep quality (O.R. 1.71, p=0.044) and, after 2 years, suicidal ideation was best predicted by poor sleep quality experienced at baseline (OR 67.3, p=0.001). Conclusions: Poor sleep quality may play as an independent predictor of suicidal risk in post-COVID survivors. Evaluating and targeting sleep disturbances in COVID survivors is important to prevent the consequences of disrupted sleep in mental health

Isolation of individual hop iso-α-acids stereoisomers by β-cyclodextrin.

Individual iso-α-acids that are responsible for the bitter taste of beer need to be isolated because these acids are required as reference standards in quantitative analysis and when studying the parameters which effect the quality of beer. However, these pure compounds are very expensive, due to inefficient isolation methods. In this study a new isolation method has been developed, in order to reduce the isolation cost. β-Cyclodextrin has been used for the isolation of trans- and cis-iso-α-acids. The separation from the mixture of stereoisomers was achieved by complexation, using ethanol:water (1:2, v/v) as a solvent at a temperature of 50°C for 30min. The molar ratio of iso-α-acids sample to β-cyclodextrin for complexation was 1:1. Precipitation time varied between 9h and 2days, depending on the iso-α-acid. Release of the guest from the cyclodextrin complex was successfully accomplished by elution with methanol

Identification of possible compounds posessing adenosine A1 receptor binding activity in the leaves of orthosiphon stamineus using TLC and multivariate data analysis.

A novel approach to identify compounds possessing adenosine A1 receptor binding activity in the leaves of O. stamineus was developed. O. stamineus extract is one of the components of a functional beverage used in Indonesia for the treatment of kidney stones. In this study, adenosine A1 receptor binding, which is related to the diuretic action in the treatment of kidney stones was tested. A combination of thin layer chromatography of different extracts prepared by extraction with diverse solvents (n-hexane, chloroform, n-butanol and water), and multivariate data analysis based on orthogonal partial least squares proved to be a promising approach to determine these active compounds. Several methoxyflavonoids, fatty acids or terpenoids were estimated to be related to this activity. The results of this study support the traditional use in Indonesia of O. stamineus as a functional drink to treat kidney stones