Rikhsan Kurniatuhadi

• M.Sc.
• Lecturer at Tanjungpura University

Screening and selecting of indigenous gastrointestinal bacteria and nipah worm fecal pellets are very important before being applied as probiotics. Previous studies have succesfully isolated 10 bacterial isolates that having cellulolytic and proteolytic abilities from intestinal and fecal pellets of nipah worm. The purpose of this study was to dete...

Streptomyces involves in the degradation process of organic compounds on the soils including in mangrove forests. In this process, Streptomyces secretes several enzymes to convert the substrates into other substances which will readily be available for detritus feeders including nipah worms (Namalycastis rhodochorde). This study investigated enzyme...

Nipah worm ( Namalycastis rhodochorde ) belongs to the Polychaeta group that lived in the Nypa fruticans mangrove sediment in West Kalimantan. It has the potential to be cultivated because it has a high economic value in aquaculture. Feed aspect is an essential part of its cultivation, through improving the quality of feed by using probiotics isola...

Screening and selecting of indigenous gastrointestinal bacteria and nipah worm fecal pellets are essential before being applied as probiotics. Previous studies have successfully isolated 10 bacterial isolates that having cellulolytic and proteolytic abilities from intestinal and fecal pellets of nipah worm. The purpose of this study was to determin...

Yanti AH, Setyawati TR, Kurniatuhadi R. 2020. Isolation and characterization of lactic acid bacteria from fecal pellets, coelomic fluid, and gastrointestinal tract of Nypa worm (Namalycastis rhodochorde) from West Kalimantan, Indonesia. Biodiversitas 21: 4726-4731. Lactic acid bacteria isolated from the intestinal tract as probiotic could be benefi...

Asam kalimbawan (Sarcotheca diversifolia (Miq) Hallier F) is a native plant found in Kalimantan, especially in West Kalimantan. This species belongs to the Oxalidaceae family, known for producing compounds with antioxidant and anti-inflammatory properties. This study aims to investigate the antibacterial activity of kalimbawan tamarind fruit extrac...

Asam Kalimbawan (Sarcotheca diversifolia (Miq) Hallier F.) merupakan tumbuhan liar yang berpotensi sebagai tanaman obat dan diketahui sebagai antioksidan. Tujuan penelitian ini untuk mengetahui potensi antifungi ekstrak metanol buah Sarcotheca diversifolia terhadap Candida albicans. Ekstraksi buah asam kalimbawan (S. diversifolia) dilakukan dengan...

Kurniatuhadi R, Setyawati TR, Yanti AH, Fadhila A. 2024. Characteristics and antibacterial potency of actinomycetes isolated from nypa palm litter. Biodiversitas 25: 3449-3459. Actinomycetes are ubiquitous bacteria which are known to produce secondary metabolites with bioprospecting potential as antibacterial agents. This research aimed to qualitat...

Biodegradation of nipa palm fronds using cellulolytic bacteria on an in-vitro scale was conducted to produce feed for cultivating palm worms (Namalycastis rhodochorde). The spontaneous degradation process is thought to trigger the growth of other microbes from raw materials from unsterilized nypa palm fronds. This research aims to determine the pre...

Yeasts are known to have broad and specific enzymatic activity, including cellulolytic activity. The diversity of yeast in the nypa palm mangrove area is thought to have a role in the organic degradation process of nypa leaf litter which supports the fermentation of nypa palm worm feed. This study aims to determine the composition and genera of yea...

Anthropogenic activities in Nypa palm (Nypa fructicans) forests directly leave a lot of residual nipa fronds, which take longer to decompose. The decomposition process involves decomposer organisms, one of which is Arthropods. Nevertheless, information regarding the composition of decomposition fronds is still limited. This study aims to obtain dat...

Tracer Study merupakan salah satu bentuk survey atau studi penelusuran alumni yang mempunyai nilai strategis untuk pengembangan mutu dan kualitas perguruan tinggi. Berbagai cara yang dilakukan oleh universitas untuk mengevaluasi proses pendidikan dalam rangka meningkatkan mutu pendidikan tinggi salah satunya menyelenggarakan Tracer Study. Universit...

Exploration of yeast from nypa palm worm habitat

Eco-enzyme is a fermented product from an organic waste substrate, molasses, and water. Eco-enzyme can be used as antibacterial because it produces organic compounds such as alcohol and acetic acid. Pineapple peel waste (Ananas comosus L.) can be used as an eco-enzyme. This study aimed to test the antibacterial activity of pineapple peel eco enzyme...

Sengkubang Village is a mangrove area located in Mempawah Hilir District, Mempawah Regency, West Kalimantan. Sengkubang Village already has a Coastal Community Group that cares about the preservation of mangroves. However, community empowerment still needs to cover women's communities. Most women in Sengkubang Village work as housewives or help the...

Bacillus cereus (IHB B 379) has been isolated from the sediments of the illegal gold mining area located in Danau Biru Singkawang, these bacteria have resistant properties by being able to grow on media containing HgCl2 with a concentration of 500 ppm. This study aimed to determine the effect of temperature and concentration of mercuric chloride (H...

Eschericia coli dan Staphylococcus aureus merupakan contoh bakteri penyebab infeksi pada tubuh manusia. Salah satu tanaman yang berpotensi sebagai antibakteri adalah tanaman sengkubak. Sengkubak memiliki kandungan metabolit sekunder seperti alkaloid, flavonoid, steroid. Penelitian ini bertujuan untuk mengetahui efek antimikroba ekstrak metanol daun...

Fungi malassezia furfur merupakan fungi yang menyebabkan penyakit tinea versicolor yang menyerang stratum coeneum pada epidermis kulit. Salah satu tanaman yang memiliki potensi sebagai antifungi adalah tanaman sengkubak (P. cauliflora). Penelitian ini bertujuan untuk mengetahui konsentrasi ekstrak metanol daun sengkubak (P. cauliflora) yang efektif...

Diterima: 1 Desember 2022 Disetujui: 15 Juni 2023 Dipublikasikan: 30 Juni 2023 Traditional fermented foods have a very high diversity among the people of West Kalimantan, especially fermented foods made from essential ingredients derived from local plants such as vegetables and fruits. One is the spontaneous fermentation of lactic acid bacteria on...

Yanti AH, Kurniatuhadi R, Setyawati TR, Ramadani R. 2022. Coelomocyte activity and pathogenicity description of nypa palm worm (Namalycastis rhodochorde) after injection with Aeromonas sp. NrBF9 isolated from fecal pellets of nypa palm worm. Biodiversitas 23: 5439-5445. Coelomocytes in the Annelida group play a role in the immune system by recogniz...

Bakteri endofit memiliki karakteristik berada dalam jaringan tumbuhan (akar, batang, daun, dan bunga) tanpa menyebabkan gangguan pada tumbuhan. Tujuan penelitian ini untuk mengetahui karakteristik bakteri endofit yang diisolasi dari akar napas (Pneumatofor) tumbuhan Avicennia marina. Pengambilan sampel akar napas dilakukan di Mempawah Mangrove Park...

Jus jeruk siam (Citrus nobilis var. microcarpa) yang difermentasi merupakan minuman olahan yang mengandung nutrisi penunjang pertumbuhan dari khamir probiotik. Tujuan dari penelitian ini adalah untuk mengetahui potensial probiotik dari khamir dan mengetahui genus khamir probiotik yang diisolasi dari fermentasi jus jeruk siam. Kemampuan dari khamir...

The bacterial isolates NrLtF1, NrLtF4, NrLtF5, and NrLtG2 isolated from fecal pellets and gastrointestinal tract of nypha worms (Namalycastis rhodochorde) have cellulolytic, proteolytic activity and produce organic acids. The four isolates have the potency to be developed as probiotics in nypha worm cultivation feed. This study aims to determine th...

Streptomyces memiliki potensi sebagai sumber metabolit antibakteri yang dapat dikembangkan dan diaplikasikan dalam pengembangan budidaya cacing nipah. Streptomyces memiliki karakter morfologi kultur yang berbeda-beda di beberapa medium agar dan merupakan aspek yang sangat penting dalam proses identifikasi dan klasifikasinya. Streptomyces spp. telah...

Candidiasis is a fungal infection caused by the fungus Candida albicans . One of the plants that has potential as an antifungal activity is Acalypha hispida . The objectives of this research determined the phytochemical analysis and antifungal activity of A. hispida flower methanolic extract on the growth of C. albicans using the disc diffusion met...

Bacteria of the genus Thermoactinomyces have the ability to produce antibacterial bioactive compounds. This bioactive compound can be used for combating diarrheal agents such as Escherichia coli and Staphylococcus aureus. This study aims to determine the antibacterial activity of the metabolite extract from Thermoactinomyces sp. (H24) against Esche...

Kesehatan merupakan faktor kebutuhan utama manusia untuk dapat melangsungkan aktivitas hidup dengan sempurna. Kesehatan masyarakat terganggu bila terdapat kuman yang menginfeksi tubuh. Corona atau Severe Acute Respiratory Syndrome Coronavirus 2 (SARS- CoV-2) adalah virus yang menyerang sistem pernapasan. Penyakit ini dapat menyebabkan infeksi paru-...

(Article History: Received February 1, 2021; Revised March 8, 2021; Accepted April 7, 2021) ABSTRAK Upaya produksi gaharu budidaya umumnya menggunakan inokulan dari jenis Fusarium sp., namun mahalnya inokulan biakan murni menjadi faktor pembatas untuk produksi gaharu budidaya. Bioinokulan dapat menjadi solusi bagi petani gaharu karena dibuat dari b...

Candida albicans is a microorganism that knows as caused of candidiasis. Nocardia is known to have the ability to produce antifungal bioactive compounds to overcome cases of fungal infections. This research aims to determine the presence of antifungal activity and the good concentration from crude extract of Nocardia sp. ATS-4.1 to inhibit C. albic...

Acalpha hispida flower commonly used as traditional medicine. The antibacterial potential of the A. hispida flower can be used to treat diarrhea and cancer. The purpose of this study was to determine the antibacterial activity and effective concentration of methanol extract of A. hispida flower against to S. flexneri and B. cereus. Sample used was...

(Article History: Received 21 October 2020; Revised 5 November 2020; Accepted 11 November 2020) ABSTRAKPenyakit hawar pada tanaman padi disebabkan oleh bakteri anggota genus Xanthomonas. Pengendalian penyakit tanaman dapat menggunakan bakteri sebagai Agen Pengendalian Hayati (APH) yang bersifat antagonis terhadap patogen. Pseudomonas flourescens me...

Streptomyces involves in the degradation process of organic compounds on the soils, including mangrove forests. In this process, Streptomyces secretes several enzymes to convert the substrates into other substances, which will readily be available for detritus feeders, including nipah worms ( Namalycastis rhodochorde ). This study investigated the...

Indigenous molds from the gastrovascular cavity of nipah worms have been explored and will be applied to nipah worm cultivation in order to increase growth and production through feed. Appropriate feed formula is expected to increase the growth of worms as in their natural habitat. This study aims to explore and identify the types and characteristi...

Abstrak Jamur halofilik adalah kelompok mikroorganisme yang dapat hidup dan beradaptasi pada kondisi lingkungan salin.Tujuan penelitian ini yaitu untuk mengetahui karakteristik fisiologis jamur halofilik berdasarkan faktor lingkungan dari sumur air asin di desa Suak, Kabupaten Sintang.Metode yang digunakan yaitu dengan menumbuhkan jamur halofilik p...

Abstrak. Streptomyces terlibat dalam proses degradasi senyawa organik pada substrat pakan cacing nipah (Namalycastis rhodochorde). Streptomyces mensekresikan beberapa enzim untuk memecah makromolekul organik menjadi senyawa sederhana yang tersedia bagi detritivor cacing nipah. Penelitian ini bertujuan untuk mendeteksi aktivitas enzim enam Streptomy...

Ocimum basilicum is one type of vegetables that can be consumed without having to be processed. Food consumed must have high nutritional value, clean and free of microbes. Coliform is one of the bacteria that can cause disease in humans. This study aims to determine the value of MPN on samples Ocimum basilicum leaves from warung lamongan in Pontian...

Jelantah is the residual waste of cooking oil. The disposal of untreated waste directly into the environment has the potential to promote damage such as water channels clogging and water body pollution. Form of waste treatment such as biodegradation can be done using potential bacteria such as Pseudomonas spp. which has been known for being effecti...

Burger is one of the food in Indonesia that consists of bread, meat, vegetables, sauce, and mayonnaise. This study aims to detect the bacterial presence from genus Salmonella and Shigella in burger food sold in Sungai Raya Dalam, Pontianak. Samples were collected from the location consist of cooked whole burger, precooked bread, postcooked bread, p...

Eryngium foetidum is a plant commonly used a seasoning cuisine and has a variety of chemical compounds that potentially an antifungal. The ethanol extract Eryngium foetidum was tested against fungal isolate Xi.01. The isolat Xi.01 isolated from the pepper (Piper Nigrum) stem was identified as Xeromyces sp. This study aimed to determine the ability...

Fractionation of ethyl acetate extract obtained by culturing the endophytic fungus Pseudocosmospora sp. Bm-1-1 resulted in the isolation of four new meroterpenoids, cosmosporin A (1), 6-carboxy-cosmosporin A (2), rel-(6aS,10aR)-Δ 9-tetrahydrocannabiorcolic acid B (3) and 8′-hydroxy-cannabiorcichromenic acid (4), in addition to four known compounds...

Bacteria belongs to the genus of Staphylococcus is pathogenic bacteria and its existence is an indicator of contaminated environment particularly in the air. The aim of this study is to detect the existence of bacteria belongs to Staphylococcus in the traditional market space of Pontianak city. The study was conducted in January - March 2018. Sampl...

Actinomycetes bacteria can grow well in soil media with acidic pH conditions such as peat soil. This study aims to determine the genus of Actinomycetes bacteria from peat soil. Sampling was done in Tajok Kayong Village, Ketapang Regency. Isolation was carried out using Pour Plate Method using specific media, namely SCA (Strach Casein Agar) media, w...

Stem rot disease is caused by one of Phytophthora pathogenic fungi that attacks several types of cultivated plants. The alternative control against Phytophthora attack can be done with the use of natural fungicides. One of the herbs that can be untilized is the ethanol extract of lakum stem (Cayratia trifolia (L.) Domin). The aim of this research i...

The wood vinegar of the stem of mangosteen (G. mangostana L.) is the result of pyrolysis of the stem which is condensed into steam. Wood vinegar contains acid and phenol compounds that have antibacterial activities. This research aims to determine the biological activities of the wood vinegar of the stem of mangosteen (G. mangostana L.) on the viab...

p>Peat soil is a type of soil that dominates the island of Borneo. Typical compounds in peat soil is shumic acid. Various in vitro studies performed have shown peat subtropical humic compounds can stimulate the immune system. However, in vivo study on animal has not been done. This study aimed to determine the effect of humic acid extracted from pe...

Peat soil is organic soil types that has various biological potential to be developed. Humic acid compounds in the peat soil have a variety of potential biological one as immunostimulant. The aimed of this study to determine the effect of humic acid extracted from peat soil spleen histology Kalimantan against white male rats (Rattus novergicus L.)...

The aim of this study was to provide the first information of the diversity mercury-resistant bacteria in the Hg-polluted sites of Singkawang that might be useful for developing bioremediation technology as problem solving for mercuy-contaminated environment in Indonesia. In the present study, eleven mercury-resistant bacteria were isolated from me...