A new species of the genus Caenorhinus Thomson, 1859 (Coleoptera: Rhynchitidae) from Vietnam

Caenorhinus (Flavodeporaus) belokobylskii sp. n. is described and illustrated from Northwest Vietnam. The new species is similar to C. (F.) lobanovi Legalov, 2021 from Laos but differs in the protibiae of males with mucro, longer and thinner rostrum, slender antennae, densely punctate head and pronotum, convex elytral interstriae, brownish-yellow elytra, slightly tapered aedeagus, and armament of the endophallus.

Potensi Limbah Sisik Ikan Sebagai Kitosan dalam Pembuatan Bioplastik

<p><strong>Bioplastics are environmentally friendly plastics derived from natural materials. Bioplastics are easier to decompose when compared to commercial plastics. Bioplastics are generally made from starch contained in plants. But the use of starch as a base material has the disadvantage of producing bioplastics that are not waterproof. Therefore, it is necessary to add chitosan to improve bioplastic characteristics. Chitosan usually comes from the shell of crustacean animals, but it turns out that in fish scales waste, also contains chitosan. Fish scales are a by-product of the process of fish processing. Fish scales are only discarded and not utilized so that they become waste that can pollute the environment. Fish scales have a chitin content that can process into chitosan, which can be useful as an additional ingredient in the manufacture of bioplastics. This review aims to find out the potential of fish scales waste as chitosan in the manufacture of bioplastics. Based on the results of previous research, fish scales have a chitosan content that can use as an additional ingredient in the manufacture of bioplastics. Fish scale chitosan can form bioplastic film with characteristic brownish-yellow film. The addition of fish scale chitosan is also able to improve the water resistance of bioplastic film. Based on the results of the review can be concluded bring fish scales to have the potential as chitosan that can use in the manufacture of bioplastic.</strong></p><p><strong>Keywords –</strong> <em>Bioplastic, Chitosan, Fish Scales.</em></p><p> </p>

Amanita vladimirii (Amanitaceae, Agaricales), a new European species in section Vaginatae

Amanita vladimirii, a new species in sect. Vaginatae, is described and illustrated based on collections from the Czech Republic and France. The distinctive sequences of the LSU, ITS and tef1-α genetic markers, support the status of A. vladimirii as a new species. Amanita vladimirii is characterised by a greyish pileus striate at margin, a whitish stipe; and a relatively thin, but firm, membranous volva which is externally white with brownish yellow tinges where touched and internally is white-beige or greyish beige. Microscopically, the universal veil is composed of 3 layers; globose basidiospores; a ramose subhymenium; lamellar trama reduced to a mediostratum composed of parallel elements and a pileipellis without a differentiated subpellis.

Potensiometric of Struvite (MgNH4PO4.6H2O) Formation System from Biogas Waste in Electrolysis Cells

Struvite is a yellowish white or brownish yellow crystal. Struvite occurs in an alkaline environment. The reaction that occurs is the reduction of H+ and at the anode is H2O oxidation. The purpose of this study was to determine the maximum potential conditions of deposition of struvite which was contained in biogas waste by electrolysis process and to improve the quality of struvite fertilizer. The method was carried out with the electrolysis time condition of 30 minutes where the electrical voltages used were 1V, 3V, 5V, 7V, and 9V and the size of the electrodes used were 30 cm, 36 cm, 50 cm, 60 cm, 70 cm. From the research that has been done, it could be seen that the struvite formed was very small, the best conditions in this study at 5V voltage and 36 cm electrode area with a yield of 28.8%.

Tetragonula laeviceps (Hymenoptera: Apidae: Meliponini): Morphology, Morphometric, and Nest Structure

Background: Stingless bees is one group of eusocial insects living together in the hive. There are around 46 species of stingless bee in Indonesia with different morphological, morphometric and hive structure characteristics. This study aimed to describe the morphological, morphometric and beehives structure of Tetragonula laeviceps from Yogyakarta. Methods: Survey method is used by taking three sampling points of bamboo, house building and livestock crates in Bantul Regency. Sampling points determined by Purposive sampling method. An XSZ-107 BN binocular microscope analyzed samples of T. laeviceps with Optilab viewer and Image Raster software. Results: The results showed morphological characters of T. laeviceps are dominated shiny-black body, brownish-yellow antennas, klipeus on a head covered by fine silver hair, brownish-yellow mandible with two teeth, mesonotum in thorax covered by brownish to black hair, scutellum extended to propodeum, the ribbon of hair on the dorsal thorax is not very clear, and the hind tibia is rather hairy. Morphometric of T. laeviceps included body length between 3.44 - 3.76 mm, head width 1.55 - 1.70 mm, front wing length with tegula 3.76 - 4.37 mm, length of rear limbs tibia 1.37-1.57 mm, and the number of hamuli as many as 5. The beehive structure consisted of oval-shaped entrance formed funnel and varying internal hive in terms of the number of saplings, pollen cells, and honey cells. Conclusions: T. laeviceps have morphological, morphometric and hive structure characteristics that are different from other species and variated compared to similar species from other regions.

Lichen Aureus with Dermoscopic Findings: A case report

Lichen aureus is a rare variant of pigmented purpuric dermatosis, which often affects young adults and is localized mainly on the lower extremities. We present here a 31-year-old female who had a solitary golden-brown-color patch on her right leg for 1 year. Punch biopsy of the lesion revealed lymphohistiocytic band-like infiltrate of the papillary dermis with erythrocyte extravasation and hemosiderin deposits. The diagnosis of Lichen aureus was made based on clinicopathologic findings. The dermoscopic findings that support this diagnosis were brownish yellow diffuse coloration of the background, round to oval red dots, globules and patches and twisted red loops. Herein, we present the dermoscopic findings of a 31-year-old female patient with a diagnosis of lichen aureus established with clinical and histopathological features. Keywords: pigmented purpuric dermatosis, lichen aureus, dermoscopy

The influence of calyx maturation stage and types of packaging on the germination of goldenberry seeds

Studies of the optimum harvest time for obtaining seeds for the sexual propagation of the goldenberry are essential to help maintain seed viability. This study aimed to determine the optimum harvest time for the goldenberry based on the calyx maturation stage and viability of stored seeds. The design was completely randomized a in factorial design (5 x 3), with three replications. The treatments consisted of a combination of five calyx maturation stages, assessed based on color (green, green-yellow, greenish-yellow, yellow, brownishyellow), and three types of packaging: Kraft paper bags, plastic bags, and glass. The seeds were removed from the fruit and stored at the same temperature and shade conditions for 120 days. Based on the results of the 21-day germination test, it is recommended that goldenberry seeds should be obtained from fruit with a green-yellow to brownish-yellow calyx. All the packaging types analyzed by this study are recommended for the storage of goldenberry seeds obtained from fruit with a green-yellow to brownish-yellow calyx for a 120-day storage period.

Dilochia deleoniae (Orchidaceae), a new species from Mindanao, Philippines

A new species, Dilochia deleoniae Tandang &amp; Galindon (Orchidaceae), from Mindanao Island, Philippines is described and illustrated herein. This species is distinct from other known Philippine Dilochia species by its terrestrial habit and is distinguished from all known Dilochia species by its monopodial inflorescence, rarely branching in two, and a pale yellow to dull orange or brownish-yellow labellum devoid of purple spots.

The Effect of Addition of Ginger Extract and Kencur Extract on the Physicochemical Properties of Instant Temulawak and the Sensory Properties of the Beverage

AbstrACT Temulawak has health benefits, but it is sensationally less favored because it is bitter and has an unpleasant odor, so that in its processing often other spices such as ginger and kencur are added. Temulawak can be processed into temulawak instant drink. This study aims to determine the effect of the concentration of ginger extract (0%, 15%, 30%) and kencur (0%, 15%, 30%) on the physicochemical properties of temulawak instant and sensory brewed drinks. Physicochemical measurements were carried out by analyzing the water content and density of cages of temulawak instant drink. Sensory analysis included color, aroma, spicy taste, sweetness, flavor and likeness. The results showed that the addition of ginger and kencur extract tended to increase water content. The addition of ginger extract and kencur up to 15% increase the flavor and preference of ginger drink. The best combination of the addition of ginger extract and kencur extract was obtained in the treatment of adding ginger extract 15% and the concentration of galingale extract 15% with physicochemical properties of powder drink: water content of 5.20% bb and kamba density of 0.608 g / ml. color 3.24 (brownish yellow); 2.68 spicy flavor (approaching somewhat spicy); sweetness level 3,4 (somewhat sweet); flavor 3.51 (close to tasty); fondness 3.43 (few likes).

Identification of Chemical Compounds from Nipah (Nypa fruticans Wurmb.) Endosperm

The identification of chemical compounds in Nipah (Nypa fruticans Wurmb) endosperm has been done. The extraction of chemical compounds in Nipah endosperm has been done using the maceration method with heating and followed with absorbs-desorbs on active carbon given ethanol fraction. The result obtained was a brownish-yellow fraction. The phytochemical screening test did on endosperm and ethanol fraction. Phytochemical screening results showed that the Nipah endosperm contains phenolic, tannin, flavonoid, and saponin compounds, while the ethanol fraction of Nipah endosperm did not contain alkaloid, flavonoid, steroid, triterpenoid, phenolic, tannin, and saponin compounds. Based on UV-vis, IR, and GCMS spectra, the ethanol fraction contains of furfural compounds.