bluuebunny/crossref_metadata_2025 huggingface dataset:
Impact of insurance type on outcomes in cardiac arrest patients from 2004 to 2015: A nation-wide population-based study
Authors: Lee Si Jin , Han Kap Su , Lee Eui Jung , Lee Sung Woo , Ki Myung , Ahn Hyeong Sik , Kim Su Jin
Published: July 2021

Objectives

There do not appear to be many studies which have examined the socio-economic burden and medical factors influencing the mortality and hospital costs incurred by patients with cardiac arrest in South Korea. We analyzed the differences in characteristics, medical factors, mortality, and costs between patients with national health insurance and those on a medical aid program.

Methods

We selected patients (≥20 years old) who experienced their first episode of cardiac arrest from 2004 to 2015 using data from the National Health Insurance Service database. We analyzed demographic characteristics, insurance type, urbanization of residential area, comorbidities, treatments, hospital costs, and mortality within 30 days and one year for each group. A multiple regression analysis was used to identify an association between insurance type and outcomes.

Results

Among the 487,442 patients with cardiac arrest, the medical aid group (13.3% of the total) had a higher proportion of females, rural residents, and patients treated in low-level hospitals. The patients in the medical aid group also reported a higher rate of non-shockable conditions; a high Charlson Comorbidity Index; and pre-existing comorbidities, such as hypertension, diabetes mellitus, and renal failure with a lower rate of providing a coronary angiography. The national health insurance group reported a lower one-year mortality rate (91.2%), compared to the medical aid group (94%), and a negative association with one-year mortality (Adjusted OR 0.74, 95% CI 0.71–0.76). While there was no significant difference in short-term costs between the two groups, the medical aid group reported lower long-term costs, despite a higher rate of readmission.

Conclusions

Medical aid coverage was an associated factor for one-year mortality, and may be the result of an insufficient delivery of long-term services as reflected by the lower long-term costs and higher readmission rates. There were differences of characteristics, comorbidities, medical and hospital factors and treatments in two groups. These differences in medical and hospital factors may display discrepancies by type of insurance in the delivery of services, especially in chronic healthcare services.
Late-life depression, subjective cognitive decline, and their additive risk in incidence of dementia: A nationwide longitudinal study
Authors: Wang Sheng-Min , Han Kyung-do , Kim Nak-Young , Um Yoo Hyun , Kang Dong-Woo , Na Hae-Ran , Lee Chang-Uk , Lim Hyun Kook
Published: July 2021

Objective

Late-life depression and subjective cognitive decline (SCD) are significant risk factors for dementia. However, studies with a large sample size are needed to clarify their independent and combined risks for subsequent dementia.

Methods

This nationwide population-based cohort study included all individuals aged 66 years who participated in the National Screening Program between 2009 and 2013 (N = 939,099). Subjects were followed from the day they underwent screening to the diagnosis of dementia, death, or the last follow-up day (December 31, 2017).

Results

Depressive symptom presentation, recent depressive disorder, and SCD independently increased dementia incidence with adjusted hazard ratio (aHR) of 1.286 (95% CI:1.255–1.318), 1.697 (95% CI:1.621–1.776), and 1.748 (95% CI: 689–1.808) respectively. Subjects having both SCD and depression had a higher risk (aHR = 2.466, 95% CI:2.383–2.551) of dementia than having depression (aHR = 1.402, 95% CI:1.364–1.441) or SCD (aHR = 1.748, 95% CI:1.689–1.808) alone.

Conclusions

Depressive symptoms, depressive disorder, and SCD are independent risk factors for dementia. Co-occurring depression and SCD have an additive effect on the risk of dementia; thus, early intervention and close follow up are necessary for patients with co-occurring SCD and depression.
Risk factors for severe neutropenia in pancreatic cancer patients treated with gemcitabine/nab-paclitaxel combination therapy
Authors: Ito Genta , Kawakami Kazuyoshi , Aoyama Takeshi , Yokokawa Takashi , Nakamura Masashi , Ozaka Masato , Sasahira Naoki , Hashiguchi Masayuki , Kizaki Hayato , Hama Toshihiro , Hori Satoko
Published: July 2021

Aim

Combination therapy with gemcitabine and nanoparticle albumin-bound paclitaxel (nab-paclitaxel), known as GnP therapy, significantly prolongs the survival of pancreatic cancer patients compared with gemcitabine monotherapy. However, it may cause severe neutropenia, requiring discontinuation of treatment. This study aimed to clarify the risk factors for Grade 3/4 neutropenia during GnP therapy.

Methods

Clinical data of pancreatic cancer patients who underwent GnP therapy at the Cancer Institute Hospital of the Japanese Foundation for Cancer Research from December 2014 to December 2016 were retrospectively collected. The relationship of Grade 3/4 neutropenia onset to laboratory values and patient background factors was investigated by multivariate logistic regression analysis.

Results

Clinical data of 222 patients were analyzed. Grade 3/4 neutropenia occurred in 118 patients (53.2%) in the first cycle of GnP therapy. Multivariate analysis identified low absolute neutrophil count (ANC), high total bilirubin (T-Bil), and low C-reactive protein (CRP) as risk factors for Grade 3/4 neutropenia. Age was not a risk factor. The incidence of neutropenia was 85.7% in patients with all three risk factors, but only 27.7% in patients with none of them.

Conclusion

Low ANC, high T-Bil, and low CRP may be risk factors for Grade 3/4 neutropenia in patients receiving GnP therapy, even if these laboratory values are within normal reference ranges. Patients with these risk factors should be carefully monitored for adverse events.
‘Communal Hellenism’ and ancient tragedy performances in Greece (1975–95): The ritual quest
Authors: Kaltsounas Efthymios , Karaoglou Tonia , Minioti Natalie , Papazoglou Eleni
Published: July 2021

For the better part of the twentieth century, the quest for a ‘Greek’ continuity in the so-called revival of ancient drama in Greece was inextricably linked to what is termed and studied in this paper as a Ritual Quest. Rituality was understood in two forms: one was aesthetic and neoclassicist in its hermeneutic and performative codes, which were established and recycled – and as such: ritualized – in ancient tragedy productions of the National Theatre of Greece from the 1930s to the 1970s; the other, cultivated mainly during the 1980s, was cultural and centred around the idea that continuity can be traced and explored through the direct employment of Byzantine and folk ritual elements. Both aimed at eliciting the cohesive collective response of their spectators: their turning into a liminal ritual community. This was a community tied together under an ethnocentric identity, that of Greeks participating in a Greek (theatrical) phenomenon. At first through neoclassicism, then through folklore, this artistic phenomenon was seen as documenting a diachronic and essentially political modern Greek desideratum: continuity with the ancient past.

Such developments were in tune with broader cultural movements in the period under study, which were reflected on the common imaginings of Antiquity in the modern Greek collective – consciousness – a sort of ‘Communal Hellenism’. The press reception of performances, apart from being a productive vehicle for the study of the productions as such, provides indispensable indexes to audience reception. Through the study of theatre reviews, we propose to explore the crucial shifts registered in the definition of Greekness and its dynamic connections to Antiquity.
When love and critique collide:1 Methodology, ontology, fandom and standpoint in metal research
Authors: Hill Rosemary Lucy
Published: July 2021

Metal studies is now into its teenage years. It has been shaped by different fields of academic study, different ideas of how research should be done, varying ideas about the kinds of questions we should be asking and even, and importantly, varying ideas of what metal is and what counts as metal. In this article, I open up discussion about methodology and ontology in metal studies. This is a vital discussion because it goes to the heart of what we can say about metal. My aim is to prick the consciences of metal scholars in order to inspire closer examination of our standpoints as researchers. I argue that as metal scholars we are often researching the music that we love, and this can mean that we take a defensive position. Because of this, we need to be especially attentive to how our fan positions may blind us to discussing difficult aspects of our culture such as vicious misogyny and banal nationalism.
The dark side of blogging: Digital metal communities and metal influencers
Authors: Sackl-Sharif Susanne
Published: July 2021

At the 2016 Dimebash event, Phil Anselmo made a Nazi salute and shouted ‘White power!’ at the end of his performance of the Pantera song ‘Walk’ onstage. The attendant YouTuber Chris R shared a video of the incident and thus provoked a discussion about racism in metal that also included widely discussed statements of Robb Flynn and Scott Ian, who both labelled Anselmo’s actions as racist. This is one of many examples that demonstrate changing information flows and increasingly fast-paced communication processes on social media platforms, including metal communities. Online platforms such as YouTube or Facebook not only enable musicians and bands to share videos, songs, tour dates or band gossip, but also to directly engage in discussions with their fans, which may also involve social and political issues. To provide an illustration of metal bands’ possibilities for online interaction, I have created a digital metal landscape that includes a set of digital tools, platforms and applications for different music- and non-music-related activities. Against this background, I discuss here contemporary metal musicians’ political and social engagement on social media and the reach of their comments within metal communities. Based on an analysis of Robb Flynn’s online presence in his The General Journals: Diary of a Frontman and Varg Vikernes’ Thulean Perspective, I will show that in the digital age, it is possible for metal musicians to become important influencers not only regarding music but also regarding social and political issues.
Ser humano é maior que ser dentista
Authors: Rossi Felipe Augusto Rodrigues
Published: July 2021

Ser humano é maior que ser dentista
Digitalisierung für eine nachhaltige Zukunft nutzen
Authors: Müller Claudia
Published: July 2021

Digitalisierung weckt Hoffnungen auf eine nachhaltige Zukunft ‐ etwa durch vernetzte Mobilität, ressourceneffiziente Produktion oder eine verbesserte soziale Teilhabe. Der durch die COVID-19-Pandemie forcierte Megatrend birgt aber auch Risiken wie den Verlust von Datensouveränität
oder die Produktion von Elektroschrott. Das Bundesministerium für Bildung und Forschung fördert Projekte, die Chancen und Risiken der Digitalisierung bewerten und nach Lösungen für eine digitale und nachhaltige Entwicklung suchen.
Mit Umweltethik gegen Pandemien: Warum Tierrechte und Naturschutz auch den Menschen nutzen
Authors: Bossert Leonie N. , Schlegel Lena M.
Published: July 2021

Das Entstehen von Pandemien wie COVID-19 wird auch durch menschliche Eingriffe in die Natur begünstigt. Die Umweltethik bietet Argumente, um unseren Umgang mit Pflanzen und Tieren zu bewerten und einen schonenden, respektvollen Umgang mit der außermenschlichen Natur zu befördern.
So sollte etwa tierethischen Belangen mehr Aufmerksamkeit geschenkt werden ‐ im Interesse der Tiere wie auch zur Prävention von Pandemien.
Feldfrüchte und Strom von Agrarflächen: Was ist Agri-Photovoltaik und was kann sie leisten?
Authors: Schindele Stephan
Published: July 2021

Agri-Photovoltaik bedeutet, dass Agrarflächen doppelt genutzt werden: zum Anbau von Feldfrüchten und zur Produktion von Strom. Aufgrund dieser ,,Doppelernte“ verliert die Landwirtschaft keine Anbauflächen ‐ anders als bei Photovoltaik-Freiflächenanlagen, die überwiegend der Stromerzeugung dienen. Damit Subventionen jenen Nutzungen zugute kommen, die der Umwelt und der Nahrungsmittelproduktion gleichermaßen dienen, ist es wichtig, Agri-Photovoltaik von Freiflächenanlagen abzugrenzen und verschiedene Varianten der Agri-Photovoltaik zu unterscheiden.“Agrivoltaics” denotes approaches to use agricultural areas simultaneously to produce food and to generate photovoltaic (PV) electricity. Social impact analysis shows that for a successful agrivoltaics dissemination, clear standards must be set for the agricultural activity on agrivoltaics sites, so that no subsidy abuse and pseudo-farming occur. Until today there is no internationally recognized definition of agrivoltaics, but since more governments are willing to include the technology in their policies, this article derives a generally valid agrivoltaics definition and puts it up for debate. In the first step, differentiation criteria of agrivoltaics from other PV applications were developed. In the second step, the derived properties were scrutinised with reference to the political reasons for agrivoltaics diffusion in Germany, and compared to Germany’s goals in terms of energy and environmental policy. Finally, a basic definition is derived that must meet certain mandatory requirements. This generally applicable definition of agrivoltaics can be supplemented in the national context by optional requirements to steer diffusion more purposefully. The results contribute to the debate on the definition of agrivoltaics in Germany and can also enrich the discourse in other governments and parliaments on agrivoltaics market introduction.
Morfología comparada de diez taxones del género Celtis (Cannabaceae) del Cono Sur Sudamericano
Authors: Chamorro Débora C. , Zamengo Henrique B. , Mogni Virginia Y. , Torres Roseli B. , Gaglioti André L. , Da-Silva Paulo R. , Leme Flávia M. , Prado Darién E. , Oakley Luis J.
Published: July 2021

The genus Celtis L. (Cannabaceae) comprises around 73 species distributed in temperate and tropical regions of both hemispheres. Most South American species belong to the subgenus Mertensia Planch., and they are characterized by showing high morphological plasticity. A recent taxonomic revision of this group was carried out with an excessively reductionist criterion regarding the number of accepted species and that does not clearly reflect the morphological differences among them. In order to contribute to the correct delimitation of the specific entities, a morpho-descriptive approach is presented for ten taxa of the genus Celtis (C. brasiliensis, C. chichape, C. clausseniana, C. fluminensis, C. pallida var. pallida, C pallida var. discolor, C. serratissima, C. spinosa, C. spinosissima and C. tala) growing in South American Southern Cone. The morphology was analyzed through the use of a stereomicroscope and/or the tpsDig program for digital images of specimens. As a result, a key is provided for the determination of the aforementioned species and a detailed morphological description of the vegetative (habit, bark, branches, spines, brachyblasts, indumentum and leaves) and reproductive structures (inflorescences, flowers, fruits and endocarp -pyrene-). In addition, a specimen collection guide is proposed with a list of the main morphological characters that should be observed in the field, to facilitate future identifications.
The Role of Trace Elements in Retinal Diseases
Authors: Hassan Huda H. , Ali Eham Amer , Salman Alea Farhan
Published: July 2021

Background: The role of serum zinc, and magnesium concentration activities in association with the Blood sugar level, and their link as biochemical marker risk for lens damage, inflammation, for the Retinal disease patients with diabetes beside lens replacement surgery, and in control individuals for both genders. Our purpose for the current study is to investigate serum concentration levels of blood sugar, zinc, and magnesium, as trace elements for patients with retinal diseases with diabetes in correlation with healthy subjects, and their effect on eye function, lens damage, inflammation, and bacterial or viral infections, or even undergo artificial intraocular lens surgery. Also to find a diagnostic prediction for blood sugar, magnesemia and zinc levels may induce causing diabetes retinopathy, cataract, or even glaucoma. Materials and methods: Total of forty six diabetic retinopathy patients their mean is (53.36±16.3), and thirty four healthy controls with mean of (49.91±21.72) have been studied. The age has non-significantly (P>0.05) differ in diabetic retinopathy patients (53.36±16.31 year) from normal subjects (49.91±21.72 year). Retinal disease patients are diagnosed on the basis of pathological condition into diabetic retinopathy patients. Results: Assessment, of serum zinc, and magnesium, and blood glucose levels were done for all groups. The concentricity of serum zinc levels are depressed, and non-significantly differ for diabetic retinopathy patients, higher in (33±19.48 ng/L with P= 0.122), from that of normal subjects. Whilst the level of magnesium was exhibited to be decreased for diabetic retinopathy patients, they showed (1.74±0.34 ng/L with P = 0.390) from that of normal subjects. Moreover, blood sugar levels are increased in diabetes than control (10.27±4.62 μmol/L versus 5.23±0.40 μmol/L with P = 0.0001). All parameters has are correlated non-significantly association with each other for diabetic retinopathy patients.
Treatment of Aqueous Solutions of Lipophilic Cationic Dye Using Activated Carbon and Ferrous Oxide Synthesized Nanoparticles
Authors: Ubaid Ahmed Qasim , Majeed Nadia Mohammed , Savore Ahmed Mohammed Ali , Al-Haidarey Mohammed Jawad Salih
Published: July 2021

Adsorption is one of the promising strategies for aqueous dye remediation. A lot of attention has been paid to textile wastewater treatment using smart materials. In this study, we formed the N-FeO to test its properties by using FTIR and TEM technique. We also tested AC, N-FeO and mixed N-FeO/AC to investigate the adsorption efficiency of lipophilic cationic dye (LCD) removal from aqueous solutions of each individually under. The results showed that the removal percentage of lipophilic cationic dye by using activated crbon was increasing significantly with AC wight (Pvalue < 0.01), and the highst removal was to 0.1 ppm of dye (52%). While the lowest dye removal percentage was 14.3% of 1ppm dye concentration and 0.05g AC. The rmoval of dye, by using N-FeO, was depant on the concentration of dye and the amount of N-FeO. The highst percentage of dye removal was 45% ±3.69 of 0.1 ppm concentration with using 0.3g and 0.35 g of N-FeO. While the lowest removal percentage of dye was 7.3%±2.49 of 1ppm with using 0.05g of N-FeO. The using of N-FeO/AC mixture leads to a significant removal percentage of dye in different concentrations compared with using each of them a lone. By this mixture, the highest removal of dye reached to 98%±3.47, 92%±3.96, and 88%±1.44 of 0.1ppm, 0.5ppm, and 1ppm respectively by using 0.35g of N-FeO/AC mixture. While the lowest dye removal percentage was 54%±1.1, 46%±0.98, and 40%±2.49 of 0.1ppm, 0.5ppm, and 1ppm respectively by using 0.05g of N-FeO/AC mixture. This study suggested that the increase in adsorption at low dye concentration was due to the availability of active sites that were saturated While the adsorbing surface area will increase with the N-FeO/AC mixture, the percentage of dye removal at constant temperature will also increase, and it is nessesary to using more chemometric test of this mixture for testing the best removal environment of this kind of dye.
Chromosomal Aberration for Diagnosis and Prognosis of Acute Myeloid Leukemia Iraqi Patients
Authors: Ali Amal M. , Salih Shahlaa M
Published: July 2021

Background: Acute myeloid leukemia (AML) is a hematopoietic disorder in which there are too many immature blood-forming cells accumulating in the bone marrow and interfering with the production of normal blood cells. It has long been recognized that AML is a clinically heterogeneous disease characterized by a multitude of chromosomal abnormalities and gene mutations, which translate to marked differences in responses and survival following chemotherapy. This study aimed to clarify the chromosomal aberrations in early diagnosed and relapsed cases of AML. Materials and methods: Chromosomal changes were studied in thirty Iraqi patient samples diagnosed with acute myeloid leukemia were divided into 9 newly diagnosed and 13 received chemotherapy who were incomplete remission and 8 relapsed subjects. Results: Analysis of all chromosomal aberrations showed complex karyotype for most cells of relapsed AML patients compared with newly diagnosed patients. Conclusions: Chromosomal abnormalities are linked to AML development and high complexity of karyotyping for relapsed group.
Kondisi Padang Lamun di Perairan Teluk Awur Jepara Terkait dengan Parameter Lingkungan Perairan dan Keberadaan Sampah Makro Plastik
Authors: Kurniawan Hendra , Yulianto Bambang , Riniatsih Ita
Published: July 2021

Ekosistem padang lamun merupakan salah satu ekosistem di wilayah pesisir yang mempunyai peranan yang penting untuk menjaga kelestarian dan keanekaragaman organisme laut. Kondisi parameter perairan pesisir merupakan faktor penting terhadap kondisi padang lamun yang meliputi  kecerahan perairan, pasang surut, arus, gelombang, suhu, salinitas, DO, kadar BOT dan pencemaran. Penelitian ini bertujuan untuk melihat pengaruh kondisi oseanografi dan sampah makro plastik terhadap kondisi padang lamun di perairan Teluk Awur Jepara yang dilakukan pada 3 stasiun pengamatan. Hasil penelitian menunjukkan bahwa bahwa tipe pasang surut di lokasi pengamatan adalah mixed tide prevailing semi durnal. Kisaran data kecerahan 30-40 cm, kisaran kecepatan arus antara 0,109-0,0154 m/det, tinggi gelombang  0,5-126 cm, suhu 28-30 0c, salinitas  34-35%, kisaran kadar DO 4,2-4,9 ppm, dan kisaran kadar BOT 9,9-11,9 mg/liter. Kisaran berat sampah yang di temukan 0,08 kg- 1,8 kg di seluruh stasiun. Kisaran prosentase penutupan lamun  seluruh stasiun 14,678% - 20,706%, hal ini menunjukan bahwa kondisi padang lamun di perairan Teluk Awur dalam kondisi tidak sehat (>25%). Seagrass ecosystem is one of the ecosystems in coastal areas that has an important role to maintain the sustainability and diversity of marine organisms. The condition of coastal water parameters is an important factor for seagrass conditions including waters brightness, tides, currents, waves, temperature, salinity, DO, BOT levels and pollution. This study aims to look at the effect of oceanographic conditions and macro plastic waste on seagrass conditions in the waters of Teluk Awur Jepara conducted at 3 observation stations. The results showed that the tidal type at the observation site was mixed tide prevailing semi durnal. Brightness data range is 30-40 cm, current speed range is between 0.109-0.0154 m / sec, wave height is 0.5-126 cm, temperature is 28-30 0c, salinity is 34-35%, DO content range is 44,2-4,9ppm, and the range of BOT levels 9.9-11.9 mg / liter. The range of waste weight found was 0.08 kg - 1.8 kg at all stations. The range of seagrass closure percentage for all stations is 14.678% - 20.706%, this shows that the condition of seagrass in waters of Teluk Awur Jepara is in an unhealthy condition (>25%).
Sebaran Konsentrasi Material Padatan Tersuspensi dan Fosfat di Perairan Semarang, Jawa Tengah
Authors: Utama I Made Rifaldy Puja , Maslukah Lilik , Wulandari Sri Yulina
Published: July 2021

Sungai Banjir Kanal Barat dan Banjir Kanal Timur merupakan sungai besar yang berperan dalam mempengaruhi nilai kualitas perairan Semarang. Sungai ini membawa material dan limbah yang berasal dari darat kemudian mengalir ke laut melalui muara sungai. Penelitian ini bertujuan untuk mengetahui nilai konsentrasi zat padat tersuspensi (MPT) dan fosfat serta pola distribusinya. Penelitian ini dilaksanakan pada bulan Februari 2019 dengan menggunakan metode deskriptif kuantitatif. Metode penentuan lokasi menggunakan purposive sampling pada 22 stasiun yang dapat merepresentasikan wilayah muara dan laut. Penentuan MPT secara gravimetri  dan fosfat menggunakan metode asam askorbat. Hasil konsentrasi MPT berkisar antara 50-290 mg/L dan fosfat 0,95-0,16 mg/L. Pola distribusi secara horisontal MPT menunjukkan lebih tinggi di daerah dekat pantai dan pola sebaran vertikal menunjukkan lebih tinggi di permukaan (0,2 m) dibanding di bagian bawah (0,8 m). Pola sebaliknya ditemukan pada sebaran fosfat dengan nilai lebih tinggi di dasar dan pola sebaran spasialnya menunjukkan konsentrasi tinggi ditemukan di wilayah timur yaitu di Muara Sungai Banjir Kanal Timur. Sungai Banjir Kanal Timur memberikan kontribusi yang besar terhadap unsur hara fosfat terlarut.  The Banjir Kanal Barat  and  Banjir Kanal Timur River  are major rivers that play a role in influencing the quality value of Semarang waters. This river carries material and waste originating from the land and then flows out to the sea through the river mouth. This study aims to determine the concentration value of suspended solids (MPT) and phosphate and the distribution pattern. This research was conducted in February 2019, using descriptive quantitative methods. The method of determining the location uses purposive sampling at 22 stations that can represent the estuary and sea areas. Gravimetric and phosphate determination of MPT using the ascorbic acid method. The results of MPT concentrations ranged from 50-290 mg / L and phosphate from 0.95 to 0.16 mg/L. Spatial distribution of MPT shows a high concentration in the coastal area and vertically, the distribution is higher at the surface (0.2 m) than at the bottom (0.8 m). This pattern is different from the phosphate which is found to be higher at the bottom with its spatial distribution showing a high concentration in the eastern region, namely in the estuary of Banjir Kanal Timur. This estuary of Banjir Kanal Timur has a large contribution to phosphate ions.
Hubungan Kandungan Nitrat Dan Fosfat Dalam Substrat Terhadap Kerapatan Lamun Di Perairan Pantai Prawean, Jepara
Authors: Subiakto Achmad Yusuf , Santosa Gunawan Widi , Suryono Suryono , Riniatsih Ita
Published: July 2021

Senyawa nitrat dan fosfat merupakan nutrien yang dapat dijadikan sebagai petunjuk kesuburan perairan dan dibutuhkan baik pertumbuhan dan perkembangan lamun. Nutrien di perairan padang lamun berperan sebagai faktor pembatas pertumbuhan. Penyerapan nutrien oleh lamun dilakukan oleh daun dan akar. Besarnya kandungan nutrien dalam sedimen bukan berarti akan selalu dalam konsentrasi yang sama pada karakteristik  sedimen dasar dan kedalaman perairan. Bila terjadi perbedaan maka hal ini bisa mempengaruhi terjadinya perbedaan kondisi kepadatan dan sebaran pada setiap jenis lamun yang tumbuh dalam perairan, oleh karena itu perlu dilakukan penelitian tentang hubungan kandungan Nitrat dan fosfat dalam substrat terhadap kerapatan lamun di perairan pantai Prawean, Jepara. Penelitian ini dilakukan pada bulan Desember 2018- Januari 2019. Metode penentuan lokasi pengambilan sampel dengan metode purposive sampling. Materi yang digunakan dalam penelitian adalah sampel sedimen, parameter perairan, dan kerapatan lamun. Berdasarkan hasil penelitian didapatkan Nilai kandungan Nitrat di substrat Perairan Pantai Prawean Jepara berkisar antara 1,27–1,36 mg/L tergolong pada kategori kesuburan rendah. Nilai kandungan Fosfat pada sedimen yaitu 0,049–0,086 mg/L tergolong pada kategori rendah hingga tinggi. Tingkat kerapatan padang lamun berada pada kondisi kerapatan sangat  rapat (> 175 tegakan/m2).  Nitrate and phosphate compounds are nutrients that could be used as an indicator of aquatic fertility and needed by for growth and development of seagrass. Nutrients in seagrass waters serve as a limiting factor for growth. Nutrient absorption by seagrass were done by leaves and roots. The amount of nutrient content in sediment does not mean would be always same at the concentration on the basic sediment characteristics and depth water level. If there is a difference, it will cause an affect the different conditions of density and distribution in each type of seagrass which grows in the waters, therefore it is necessary to do research about relation of nutrient in the substrate to seagrass density in Prawean Beach, Jepara. This research was conducted in December 2018 - January 2019. The method used in this study was descriptive method. The material used in the study were sediment samples, water parameters, and seagrass density. Based on the results , it was found that the value of nitrate in substrate in the waters of Prawean Jepara Beach ranged from 1.27 - 1.36 mg. L-1 belonging to the low fertility category. The value of Phosphate content in substrate was 0.049 - 0.086 mg. L-1 belonging to the low until high category. The density level of seagrass at the tight density condition very tight >175 stands. m-2.
Kelimpahan Rumput Laut Di Komunitas Lamun Di Perairan Pulau Nyamuk Kepulauan Karimunjawa
Authors: Putra Rio Adista Widodo , Santoso Adi , Riniatsih Ita
Published: July 2021

Pulau Nyamuk merupakan salah satu pulau yang berada di bagian barat kepulauan Karimunjawa. Rumput laut dan lamun masuk dalam vegetasi pesisir yang ada di Pulau Karimunjawa. Tingginya aktivitas penangkapan ikan oleh nelayan dan rencana pembangunan sarana pariwisata diduga menjadi pemicu tertekannya 2 vegetasi laut tersebut di Pulau Nyamuk. Tujuan dilakukannya penelitian ini adalah mengidentifikasi jenis dan struktur komunitas rumput laut di padang lamun di perairan Pulau Nyamuk Kepulauan Karimunjawa. Materi yang digunakan dalam penelitian ini adalah tumbuhan rumput laut dan lamun. Penelitian ini menggunakan metode deskriptif eksplorasif. Penelitian ini dilakukan pada 3 stasiun yang berbeda di perairan Pulau Nyamuk, yaitu pada stasiun A bagian timur, stasiun B pada bagian barat dan stasiun C pada bagian utara Pulau Nyamuk. Ditemukan 5 jenis rumput laut jenis Padina australis, Halimeda macroloba, Caulerpa sertulairoides, Caulerpa racemosa dan Sargassum sp. dan 2 spesies lamun jenis Enhalus acoroides dan Halophila ovalis. Rata-rata total tutupan rumput laut adalah 48,61 % sedangkan tutupan lamun adalah 19,94 %. Nilai indeks keanekaragaman dan keseragaman rumput laut termasuk kategori rendah, kecuali pada perairan utara pulau nilai keanekaragamannya sedang dan nilai keseragamannya tinggi. Sedangkan indeks dominasi terlihat ada spesies rumput laut yang mendominasi pada perairan bagian barat dan timur pulau. Nyamuk Island is one of an island located in the western part of Karimunjawa archipelago. Seaweed and seagraas is a marine vegetation in Nyamuk Island. The highest fishing activities and the development plan of tourism facilities trigger the depressed ecological function these marine vegetation on Nyamuk Island. This study aims to identify the type and structure of the seaweed community in seagrass beds and the environmental factors of aquatic physics that affect the existence of seaweed and seagrass in the waters of Nyamuk Island. This research was conducted on August 29 to September 1, 2017, located at Nyamuk Island, District Karimunjawa, Jepara regency, Central Java Province. The material used in this research was seaweed and seagrass plants. This research parameter data taken directly (in situ). This research uses descriptive exploration method. This research was conducted on 3 different stations in the waters of Nyamuk Island, which is on the east, west and north of Nyamuk Island.Found 5 types of seaweed type Padina australis, Halimeda macroloba, Caulerpa sertulairoides, Caulerpa racemosa and Sargassum sp. and 2 species of seagrass species Enhalus acoroides and Halophila ovalis. The average total seaweed cover is 48.61% while the seagrass cover is 19.94%. The index value of diversity and uniformity of seaweed is low except in Northern Island, diversity value including medium and uniformity is high, while dominance index is seen that seaweed species dominate on Western and Eastern Island.
Konsentrasi Logam Pb Di Enhalus acoroides LF. Royle 1839 (Angiosperms : Hydrocharitaceae) dan Lingkungannya di Perairan Kartini Dan Teluk Awur, Jepara
Authors: Rianda Betta , Nuraini Ria Azizah Tri , Sunaryo Sunaryo
Published: July 2021

Lamun jenis Enhalus acoroides merupakan salah satu komponen keanekaragaman hayati yang tumbuh di Perairan Kartini dan Teluk Awur. Aktivitas pariwisata, pelabuhan, pembuatan, pengecatan, pengelasan, pembersihan dan lalu lintas kapal nelayan menjadi penyebab terakumulasinya logam berat di perairan. Logam berat Pb merupakan logam berat beracun dan berbahaya, bahan pencemar dan cenderung mengganggu kelangsungan hidup organisme perairan. Tujuan penelitian ini ialah mengetahui dan menganalisis kandungan logam berat Pb pada air, sedimen dan lamun Enhalus acoroides (akar dan daun) di Perairan Kartini dan Teluk Awur, Jepara, serta mengetahui tingkat pecemarannya berdasarkan baku mutu. Penelitian ini menggunakan metode deskriptif, sedangkan metode penentuan lokasi menggunakan metode purposive sampling. Hasil penelitian menunjukkan kandungan logam berat Pb air di Perairan Kartini sebesar 0,181-0,316 mg/l dan Perairan Teluk Awur sebesar 0,001-0,157 mg/l. Kandungan logam berat Pb sedimen di Perairan Kartini sebesar 2,424-3,463 mg/kg dan Perairan Teluk Awur sebesar 2,347-2,496 mg/kg. Kandungan logam berat Pb Lamun Enhalus acoroides pada akar di Perairan Kartini sebesar 0,918–1,854 mg/kg dan Perairan Teluk Awur sebesar 0,906–1,492 mg/kg. Kandungan logam berat Pb Lamun Enhalus acoroides pada daun di Perairan Kartini sebesar 0,764–1,458 mg/kg dan Perairan Teluk Awur sebesar 0,674–1,040 mg/kg. Enhalus acoroides seagrass as a component of biodiversity that grows in the waters of Kartini and Teluk Awur. Activities in these waters include tourism, ports, manufacture, painting, welding, cleaning and traffic of fishing vessels to cause of accumulated heavy metals in the waters. Heavy metal Pb is a toxic and dangerous heavy metal, polluting material and tends to interfere with the survival of aquatic organisms. The purpose of this study was to determine and analyze the Pb heavy metal content in water, sediment and seagrass Enhalus acoroides (roots and leaves) in Kartini and Teluk Awur waters, Jepara, and to determine the level of pollution based on quality standards. This research uses descriptive method, while the location determination method uses purposive sampling method. The results showed that the heavy metal Pb water content in Kartini waters was 0.181 mg/l - 0.316 mg/l and Teluk Awur waters was 0.01-0.157 mg/l. The heavy metal content of Pb sediment in Kartini waters is 2,424-3,463 mg/kg and Teluk Awur waters was 2,347-2,496 mg/kg. The heavy metal content of Pb in Enhalus acoroides in the roots of Kartini waters was 0.918-1.854 mg/kg and Teluk Awur waters was 0.906-1.492 mg/kg. Heavy metal content of Pb in Enhalus acoroides in leaves in Kartini waters was 0.764 mg/kg - 1.458 mg/kg and Teluk Awur waters was 0.674-1.040 mg/kg
Morfometri Portunus pelagicus, Linnaeus, 1758 (Malacostraca : Portunidae) dari Perairan Jobokuto, Jepara
Authors: Rizkasumarta Yuftah , Santoso Adi , Susilo Endang Sri
Published: July 2021

Rajungan (Portunus pelagicus) memiliki nilai ekonomi tinggi, tetapi keberadaannya secara alami berhadapan dengan tingkat penangkapan yang semakin meningkat. Pesatnya perkembangan perusahaan eksportir rajungan dengan bahan baku yang bersumber dari hasil tangkapan nelayan, mengakibatkan sangat banyaknya nelayan yang melakukan penangkapan. Penangkapan rajungan dengan frekuensi tinggi dan terus-menerus tanpa memperhatikan ukuran serta kondisi rajungan, berpotensi mengurangi stok rajungan di perairan. Penelitian ini bertujuan untuk mengetahui distribusi ukuran, serta hubungan lebar karapas dengan berat rajungan yang didaratkan dari perairan Jobokuto, Jepara. Hasil dari penelitian ini menunjukkan, dari 1500 rajungan yang diamati diketahui bahwa distribusi lebar karapas berkisar 10,50-11,30 cm, dan berat berkisar  75-104 gram. Hubungan lebar karapas dengan  berat rajungan menghasilkan nilai b sebesar 1,68 untuk rajungan jantan dan 2,80 untuk rajungan betina, sehingga baik rajungan jantan maupun betina pertumbuhannya bersifat allometrik negatif. Sifat pertumbuhan ini menunjukkan bahwa pertumbuhan lebar karapas lebih cepat dibandingkan pertumbuhan berat rajungan. Persentase penggunaan alat tangkap oleh nelayan rajungan Jepara adalah Bubu (91%), dan Jaring (9%).The blue swimming crab (Portunus pelagicus) has a high economic value, but its existence is naturally faced with increasing fishing rates. The rapid development of crab exporters with raw materials sourced from fishermen's catches has resulted in very many fishers making arrests. Catching the crab with high frequency and continuously without regard to the size and condition of the crab has the potential to reduce the crab stock in the waters. This research aimed to determine the size distribution, as well as the relationship of carapace width to the weight of the crab,  landed from the seas of Jobokuto, Jepara. The results of this study indicated that of the 1500 crabs observed, the distribution of carapace width ranged from 10.50 to 11.30 cm, and the weight ranged from 75 to 104 grams. The relationship between carapace width and crab weight had a value of b of 1.68 for male crabs and 2.80 for female crabs so that both male and female crabs have negative allometric growth. This growth characteristic showed that carapace width growth is faster than the growth of crab weight. The percentage of fishing gear used by Jepara crab fishermen is Bubu (91%), and Net (9%).
Distribusi Ukuran dan Tingkat Kematangan Gonad Portunus pelagicus, Linnaeus, 1758 (Malacostraca : Portunidae) di Perairan Rembang, Jawa Tengah
Authors: Magfirani Dina Ayu , Yudiati Ervia , Hartati Retno
Published: July 2021

ABSTRAK : Rajungan merupakan komoditas ekspor bernilai ekonomis penting dan memiliki nilai komersial yang tinggi. Tingginya permintaan pasar terhadap komoditas perikanan rajungan memicu eksploitasi yang berlebihan sehingga dapat berdampak terhadap kelestarian sumber daya rajungan. Penelitian ini bertujuan untuk mengetahui distribusi ukuran, hubungan lebar dan berat, distribusi TKG, serta nisbah kelamin rajungan (Portunus pelagicus) di Perairan Gegunung Wetan, Rembang. Penelitian ini terdiri dari pengukuran panjang dan lebar karapas, pengamatan tingkat kematangan gonad rajungan betina, serta pengamatan kualitas air (salinitas, suhu, pH, kedalaman dan kecerahan). Hasil dari penelitian ini menujukkan dari 3000 ekor rajungan yang diamati diketahui distribusi lebar karapas rajungan berkisar antara 7,3 – 16  cm dengan kisaran berat sebesar 47–262 gram. Rajungan yang tertangkap memiliki pertumbuhan yang bersifat allometrik negatif, dengan nilai b sebesar 2,12 pada rajungan jantan, 1,65 pada rajungan betina. Faktor kondisinya adalah 1,1 pada jantan dan 1,02 pada betina. Sedangkan distribusi tingkat kematangan gonad rajungan betina adalah 762 ekor pada TKG 1; 700 ekor pada TKG 2; serta 388 ekor pada TKG 3.ABSTRACT : Blue swimming crab has a high economical value. The production of blue swimming crab is exported overseas, so, therefore, triggers the excessive exploitation. This will lead to have an impact related to the sustainability of natural resource. This research  aim to find out the size distribution, the relationship of carapace widht and body weight, gonad maturity stages distribution and sex ratio of blue swimming crab (P. pelagicus) at Gegunung Wetan Waters, Rembang. This consider to have a role as a tool on planning the farming and managing the blue swimming crab conservation. This research cover the length and width measurement of blue swimming crab carapace, gonad maturity stages observation of female blue swimming crab and water quality measurments (salinity, temperature, pH, water depth and water brightness). The result showed that 3000 blue swimming crabs have 7.3-16 cm of widht carapace distribution and 47-262 gram of average weight. It can be concluded that growth are negatively allometric with b value (2,12) for the male crabs and b value (1.65) for female crabs.. The condition factor of male crab  is 1,1 and female crabs is 1,02. Based on the research, the result also shows that gonad maturition stages of female crabs were 762 crabs for stage 1, 700 crabs for stage 2 and 388 crabs for stage 3.
Hubungan Lebar Karapas dan Berat Rajungan Portunus pelagicus, Linnaeus, 1758 (Malacostraca : Portunidae) di Perairan Sambiroto Pati, Jawa Tengah
Authors: Wahyu Rindika , Taufiq-SPJ Nur , Redjeki Sri
Published: July 2021

ABSTRAK : Rajungan (Portunus pelagicus) merupakan salah satu produk perikanan yang memiliki nilai ekonomi tinggi. Tujuan dalam penelitian ini yaitu untuk mengetahui variasi panjang, lebar dan berat rajungan (Portunus pelagicus) di Perairan Sambiroto pati dan Mengetahui rasio jantan betina rajungan yang tertangkap di Perairan Sambiroto Pati. Penelitian ini dilaksanakan pada bulan Oktober-November 2018 di Perairan Sambiroto, Pati. Pengambilan data rajungan meliputi data lebar dan berat rajungan. Hasil penelitian ini menunjukkan 744 ekor rajungan yang diamati diketahui variasi ukuran rajungan yang tertangkap baik jantan dan betina yang berukuran lebar > 120 mm sebanyak 68,52% dari jumlah seluruhnya yang tertangkap. Rajungan yang tertangkap di Sambiroto memiliki pertumbuhan yang bersifat allometrik negatif dengan nilai b sebesar 2,21 pada rajungan jantan dan 1,17 pada rajungan betina. Sehingga diketahui pertumbuhan lebar lebih cepat daripada pertumbuhan berat rajungan  ABSTRACT : Swimming crab (Portunus pelagicus) is a fishery product that has high economic value. The purpose of this study is to determine the variation in length, width and weight of crabs (Portunus pelagicus) in Sambiroto starch waters and to determine the ratio of crab females that are caught in Sambiroto Pati waters. This research was conducted in October-November 2018 in Sambiroto Waters, Pati. The crab retrieval data includes the crab width and weight data. The results of this study showed that 744 small crabs observed sizes variations of small crab caught both males and females with width> 120 mm totaling 68.52% of the total number caught. The crabs caught in Sambiroto have negative allometric growth with a b value of 2.21 in male crabs and 1.17 in female crabs. So it is known that the width growth is faster than the crab weight growth.
Pengaruh Rendahnya Intensitas Cahaya Terhadap Caulerpa racemosa (Forsskål) 1873 (Ulvophyceae:Caulerpaceae)
Authors: Sitorus Elfonso Robby , Santosa Gunawan Widi , Pramesti Rini
Published: July 2021

ABSTRAK: Caulerpa racemosa merupakan spesies rumput laut hijau (Chlorophyta) yang hidup di daerah pasang surut maupun daerah yang bebas dari pasang surut. Permintaan pasar yang setiap tahun meningkat, sehingga dilakukan budidaya. Penelitian ini bertujuan untuk mengetahui pengaruh intensitas cahaya yang berbeda pada pertumbuhan C. racemosa. Penelitian ini menggunakan metode eksperimental laboratoris dan rancangan percobaan yang dipakai adalah Rancanagan Acak Lengkap (RAL) yang terdiri dari 3 perlakuan dan 2 ulangan. Perlakuan pada penelitian ini dengan intensitas cahaya pada A= ± 1000 lux; B= ± 500 lux; C= ± 300 lux. Pencapaian berat basah rata-rata sebagai berikut: A= ± 0,84 gram ; B= ± 1,06 gram ; C= ± 1,13 gram. Laju Pertumbuhan Spesifik (SGR) C. racemosa adalah: A= 1,29 ± 0,04% per hari ; B= 1,12 ± 0,06% per hari ; C= 0,4 ± 0,09% per hari. Hasil penelitian menunjukkan perlakuan intensitas cahaya yang berbeda berpengaruh sangat nyata terhadap berat dan laju pertumbuhan spesifik C. racemosa (p<0,01). ABSTRACT: Caulerpa racemosa is a species of green seaweed (Chlorophyta) that live in tidal areas and areas free from tides. The market demand of C. racemosa continues to increase, it is necessary to conduct cultivation for its production. The purpose of this research was to determine the effect of different light intensities on the growth of C. racemosa. This research used an experimental laboratory method and the experimental design used was a Completely Randomized Design (CRD) consisting of 3 treatments and 2 replications. The treatment in the research was by measuring the light intensity at A = ± 1000 lux; B = ± 500 lux; C = ± 300 lux. The results showed that the average wet weight gained was : A = ± 0.84 gram ; B = ± 1.06 gram ; C = ± 1.13 grams. Specific growth rates of C. racemosa were: A = 1.29 ± 0.04% per day ; B = 1.12 ± 0.06% per day ; C = 0.4 ± 0.09% per day. The results of this study indicated that the treatment of different light intensities significantly affected the specific weight and grow rate of C. racemosa (p < 0.01).
Pengaruh Perbedaan Intensitas Cahaya Terhadap Kelimpahan Arthropoda di Perairan Desa Tambakpolo, Demak
Authors: Bramasta Arrico Fathur Yudha , Setyati Wilis Ari , Nuraini Ria Azizah Tri
Published: July 2021

ABSTRAK: Zooplankton merupakan organisme laut yang memiliki peran dalam rantai makanan di laut. Zooplankton berperan pada tingkat energi kedua yang menghubungkan produsen (fitoplankton) dengan konsumen tingkat tinggi. Penelitian ini bertujuan untuk mengetahui komposisi dan struktur komunitas Arthropoda dengan dua perbedaan intensitas cahaya (300 lux dan 2000 lux). Penelitian ini dilakukan menggunakan metode purposive sampling yang terdiri dari tiga stasiun. Pengambilan sample zooplankton dilakukan dengan bantuan plankton net yang ditarik kapal tiga kali pengulangan. Berdasarkan penelitian ditemukan 5 genus yaitu Calanus, Paracalanus, Sergia, Eucalanus dan Candacia. Genus yang paling banyak ditemukan adalah Calanus dan Sergia. Kelimpahan Arthropoda tertinggi terdapat pada Stasiun 1 dengan intensitas 2000 lux sebesar 8.492 ind/L dan terendah pada Stasiun 3 dengan intensitas 300 lux sebesar 2.286 Ind/L, hal ini diduga karena pengaruh gaya fototastik positif dari fitoplankton terhadap sumber cahaya yang direspon baik oleh zooplankton khususnya Arthropoda sebagai sumber makanan. Tingkat keanekaragaman (H’) Arthropoda di perairan tersebut termasuk dalam kategori rendah, indeks keseragaman (E) dalam kategori rendah, dan terdapat dominansi (C). ABSTRACT: Zooplankton are those organisms which have a role in  food-web in aquatic ecosystems. Zooplankton as second trophic level organism whose connects producers (phytoplankton) with consumers at a higher trophic level. This research aims to know the composition and structure of the Arthropode community with two differences in light intensity (300 lux and 2000 lux). This research was done by using purposive sampling method which consists of three stations, by using a plankton net that was pulled by the boat. The results of the study found five genera namely Calanus, Paracalanus, Sergia, Eucalanus, Candacia. The most common genera are Calanus and Sergia. The highest abundance of Arthropode at Station 1 with an intensity 2000 lux is 8.492 ind/L and the lowest at Station 3 with an intensity 300 lux is 2.286 Ind/L. The level of diversity (H') of Arthropode categorized as low, the index of uniformity (E) is categorized medium, the level of dominance (C) is classified as high.