1,818 research outputs found
Sandy soils in south central coastal Vietnam: their origin, constraints and management
No full textIn Vietnam, sandy soils are distributed mainly in the coastal central provinces where they occupy 337,768 ha comprising 63 % of the nation’s sandy soils, and they are also important to regional economic growth where more than 10 million people are living i.e.14 % of the Vietnamese population. The sandy materials in the central coastal Vietnam originate from mostly in situ weathering of granite although aeolian sediments are parent materials for sandy soils also. Sandy soils have a wide range of limiting factors for agricultural production, including nutrient deficiencies, acidity, low water holding capacity and wind erosion risk (on coastal dunal sands). Although there are soil fertility constraints to the use of sandy soils in Vietnam, 79,076 ha has been utilized in agriculture. Developing integrated nutrient management practices are needed to improve soil physical, chemical and biological fertilities of sandy soils. For example, systematic use of farmyard manures, crop residues, green manures, and alley cropping need to be considered. Developing integrated nutrient management practices also need to address environmental considerations by matching nutrient applications to crop needs and amending soils to minimise nutrient losses to water. Developing new soil management technologies (such as use of biochar, slow release fertilisers and minimum tillage) is also important for sustainable management of sandy soils in Vietnam
Vietnamophryne aurantifusca Ninh & Le & Bui & Nguyen & Orlov & Moseyko & Le & Nguyen & Hoang & Ziegler & Nguyen 2023, sp. nov.
No full text<i>Vietnamophryne aurantifusca</i> sp. nov. <p>(Figure 2)</p> <p> <b>Holotype.</b> IEBR A.5242 (Field number NH.2023.214), adult male, collected in the karst forest of Sinh Long Commune, Na Hang District, Tuyen Quang Province, Vietnam (22°31’03.4”N; 105°23’18.6”E, at an elevation of 1.056 m a.s.l.) on 25 May 2023 by Nguyen <i>et al</i>.</p> <p> <b>Paratype.</b> Adult male IEBR A.5243 (Field number NH.2023.215), the same data as the holotype.</p> <p> <b>Diagnosis.</b> The new species from Tuyen Quang is distinguished from its congeners on the basis of the following characteristics: (1) Body size small SVL (n= 2 males, 17.6–18.2 mm); (2) Head wider than long, HW/HL 1.17–1.19; (3) snout short, round in dorsal view (SL/ HW 0.33–0.35), snout length greater than eye length (SL/ EL 1.33 – 1.50); (4) eye round (EL / HW 0.23–0.25; (5) tympanum small, round, TYD / SVL 0.04–0.05; (6) first finger (F1) well developed, more than half of second finger (F2) (1 FLO/2 FLO 0.58–0.64), relative finger lengths: I<II<IV<III, relative toe lengths: I<II<V <III<IV; (7) tips of all digits round, not expanded in F1–F4, T1, T2, and T5, weakly expanded in T3 and T4; (8) subarticular tubercles under fingers and toes indistinct; (9) outer metatarsal tubercle absent, inner metatarsal tubercle small, flattened; (10) dorsal skin relatively smooth with some rounded nodules, concentrated in the middle of the back, arranged along the length of the back, a prominent ridge along the spine; (11) orangish-brown with a small triangle shape between eyes; venter orange, with grey marbling, most intense on the throat, ventral side of limbs dark grey with some whitish marbling (For the measurement see Table 3).</p> <p>...Continued on the next page</p> <p> <b>Description of holotype.</b> Habitus stout, body size small (SVL 18.2 mm), head wider than long (HW/HL 1.19), snout short, obtuse, round in dorsal view, truncate in lateral view (SL/HW 0.35) (Fig. 2), snout length greater than eye length (SL/EL 1.50); nostril round, lateral, closer to the tip of snout than to eye (N-EL/SL 0.51); dorsal surface of head slightly convex; canthus rostralis distinct, round; loreal region concave; eyes round medium-sized (EL/HW 0.23); eyes slightly protuberant in dorsal and lateral views; pupil round; tympanum well discernible, circular, small (TYD/SVL 0.04), located distantly from the eye (TED/SVL 0.04), tympanic rim not elevated above skin of the temporal area, supratympanic fold present, distinct, glandular (Fig. 2); vomerine teeth and spikes absent; tongue spatulate and free behind, papillae on tongue absent and vocal sac opening very small and hard to spot, deep in the palate.</p> <p> <b>Forelimbs.</b> Short, greater than one-fifth of body length (LAL/SVL 0.38); lower arm shorter than hand, almost one-third of forelimb length (FLL/Ua 0.36); fingers short, round in cross-section, first finger well developed, more than half of second finger (1FLO/2FLO 0.64); relative finger lengths: I<II<IV<III (Fig. 2D); webbing absent; dermal fringes present, weakly developed. Tip of the first finger rounded, slightly tapered. Tips of fingers II–V rounded, not dilated, finger disks absent, terminal grooves absent; longitudinal furrow on dorsal surface of fingers absent; subarticular tubercles under fingers indistinct; nuptial pad absent; two palmar tubercles: inner palmar tubercle small, rounded; outer palmar tubercle rounded; palmar surface smooth, supernumerary palmar tubercles absent.</p> <p> <b>Hindlimbs</b>. Short and thick, thigh length less than half of the snout-vent length (FeL/SVL 0.45); tibiotarsal articulation of adpressed limb reaching eye level; femur length nearly equal to tibia length (FeL/TL 0.97); relative toe lengths: I<II<V<III<IV; tarsus smooth, tarsal fold absent; tips of toes rounded, first toe slightly tapered, tips of toes III and IV slightly dilated (Figure. 2E), terminal grooves absent; toes rounded in cross-section; webbing absent between all toes; dermal fringes on toes present, weakly developed; subarticular tubercles under toes ovoid, slightly flattened; single metatarsal tubercle: inner metatarsal tubercle rounded, flattened.</p> <p> <b>Skin texture.</b> Dorsal skin relatively smooth with some rounded nodules, concentrated in the middle of the back, arranged along the length of the back, a prominent ridge along the spine, dorsal surfaces of the forearm, posterior and lateral parts of the dorsum, sacral area, and dorsal surfaces of hindlimbs shagreened; upper eyelids slightly harsh, supratympanic folds with low glandular ridges; ventral sides of the trunk, head and limbs completely smooth; well developed distinct dermal ridge present on midline of head and dorsum, running from between eyes to vent.</p> <p> <b>Color of holotype in life.</b> Dorsum orangish-brown, posteriorly darker, tubercles dark brown, densely scattered on dorsal surfaces of head, body, and limbs (Fig. 2A, C); posterior parts of dorsum of hindlimbs dark brown with black pustules; canthus rostralis ventrally dark brown; loreal region dark with some whitish mottling on lower jaw and mouth; upper eyelids dark brown; dorsal surfaces of forearms orange brown interspersed with greyish brown; supratympanic fold dark-brown with some whitish pustules; ventrally orange, fainter on chest, throat, and ventral surfaces of limbs, and with grey marbling, concentrated on the throat and ventral surfaces of limbs; ventral sides of fingers and toes dark grey with some whitish marbling. Pupil rounded, black, iris uniform dark brown.</p> <p> <b>Color of holotype in preservative:</b> Dorsal surface changed from brown to grey scattered with dark-brown tubercles and pustules; ventral surface of body faded completely to creamy white with dark-grey marbling denser on the throat, hands, tibia and feet.</p> <p>...Continued on the next page</p> <p> <b>Variation.</b> The holotype IEBR A.5242 has more tubercles on dorsum than the paratype IEBR A.5243.</p> <p> <b>Etymology.</b> Specific epithet is based on the Latin word for orange (aurantium) and brown (fuscus) and refers to the orange brown colouration of the new species. As for the common English name of the new species, we propose Orange-brown Dwarf Frog and the common name in Vietnamese as “Nhái lùn nâu cam”.</p> <p> <b>Distribution.</b> <i>Vietnamophryne aurantifusca</i> <b>sp. nov.</b> is currently known only from the type locality in Tuyen Quang Province, Vietnam.</p> <p> <b>Comparisons.</b> Comparative morphological characteristics are given in Table 4. <i>Vietnamophryne aurantifusca</i> <b>sp. nov.</b> can be distinguished from the other <i>Vietnamophryne</i> species by a combination of the following characteristics: from <i>V. cuongi</i> by having dorsal skin relatively smooth, with some rounded nodules, concentrated in the middle of the back vs. mostly smooth skin on dorsum with somewhat enlarged flat pustules in <i>V. cuongi</i>; Dorsum orangish-brown with a grey patch in triangle shape between eyes; ventral side orange, with grey marbling in <i>Vietnamophryne aurantifusca</i> <b>sp. nov.</b> vs. dorsally black brown, pustules on lateral dorsum white-brown and ventral side milkywhite with grey marbling in <i>V. cuongi</i> (Nguyen <i>et al</i>. 2021).</p> <p> From <i>V. inexpectata</i> by having a larger size in males (SVL 17.6–18.2 mm vs. 14.2 mm in <i>V</i>. <i>inexpectata</i>); head wider than long vs head as long as wide (HW/HL 1.17–1.19 vs. 1.01 in <i>V. inexpectata</i>); snout length greater than eye length (SL/EL 1.35–1.50 vs. 0.95 in <i>V. inexpectata</i>); a smaller tympanum (TYD/SVL 0.04–0.05 vs. 0.09 in <i>V</i>. <i>inexpectata</i>); first finger more developed (1FLO/2FLO 0.58–0.64 vs. 0.30 in <i>V. inexpectata</i>); ventral surface orange (vs. greyish-beige coloration in <i>V. inexpectata</i>; dorsum relatively smooth with some rounded nodules, arranged along the length of the back, a prominent ridge along the spine (vs. warty skin on posterior and shagreened skin on anterior parts of dorsum in <i>V. inexpectata</i>) (Poyarkov <i>et al</i>. 2018).</p> <p> From <i>V. occidentalis</i> by having a smaller size (SVL 17.6–18.2 mm vs. 20.5 in <i>V. occidentalis</i>); white spots on dorsolateral region (vs. absent in <i>V. occidentalis</i>); snout length greater than eye length (SL/EL 1.33–1.42 vs. 0.84 in <i>V. occidentalis</i>; first finger well developed (1FL/2FL 0.59–0.66 vs 0.43 in <i>V. occidentalis</i>); ventral surface orange with grey marbling (vs. bright orange-red with sparse dark brown marbling in <i>V. occidentalis</i>) (Poyarkov <i>et al</i>. 2018).</p> <p> From <i>V. orlovi</i> by having a greater size in males (SVL SVL 17.6–18.2 mm vs. 15.4 mm in <i>V. orlovi</i>); head wider than long vs head longer than wide (HW/HL 1.17–1.19 vs. 0.87 in <i>V. orlovi</i>); a smaller tympanum (TYD/SVL 0.04–0.05 vs. 0.06 in <i>V. orlovi</i>); first finger more developed (1FLO/2FLO 0.58–0.64 vs. 0.50 in <i>V. orlovi</i>); ventral surface orange with grey marbling (vs. bright lemon-yellow with dark brown marbling in <i>V. orlovi</i>) (Poyarkov <i>et al</i>. 2018).</p> <p> From <i>V. vuquangensis</i> by having a greater size (SVL 17.6–18.2 mm vs. 14.1–14.9 mm in <i>V. vuquangensis</i>); first finger more developed (1FLO/2FLO 0.58–0.64 vs. 0.43–0.49 in vs. <i>V. vuquangensis</i>); ventral surface orange with grey marbling (vs. ivory-lemon to lemon-yellow with weak dark-brown marbling in <i>V. vuquangensis</i>). Dorsum orangish-brown, posteriorly darker, tubercles dark brown densely scattered in <i>Vietnamophryne aurantifusca</i> <b>sp. nov.</b> (vs. dorsum reddish-grey on black tone, black markings mixed with small, densely scattered speckles in <i>V. vuquangensis</i>) (Hoang <i>et al</i>. 2021).</p>Published as part of <i>Ninh, Hoa Thi, Le, Linh Tu Hoang, Bui, Hai Tuan, Nguyen, Huy Quoc, Orlov, Nikolai, Moseyko, Olga Bezman, Le, Manh Van, Nguyen, Sang Ngoc, Hoang, Chung Van, Ziegler, Thomas & Nguyen, Tao Thien, 2023, A new species of Vietnamophryne (Anura: Microhylidae) from Northeastern Vietnam, pp. 505-518 in Zootaxa 5374 (4)</i> on pages 509-515, DOI: 10.11646/zootaxa.5374.4.3, <a href="http://zenodo.org/record/10158674">http://zenodo.org/record/10158674</a>
Supplemental Material, sj-rar-2-cll-10.1177_09636897211039441 - Comparative Bioactivity Analysis for Off-the-Shelf and Culture–Rescued Umbilical Cord-Derived Mesenchymal Stem/Stromal Cells in a Xeno- and Serum-Free Culture System
No full textSupplemental Material, sj-rar-2-cll-10.1177_09636897211039441 for Comparative Bioactivity Analysis for Off-the-Shelf and Culture–Rescued Umbilical Cord-Derived Mesenchymal Stem/Stromal Cells in a Xeno- and Serum-Free Culture System by Minh Quang Nguyen, Hue T. H. Bui, Anh Nguyen Thi Tuyet, Trinh Thi Hong Nhung, Duc M. Hoang, Nguyen Thanh Liem and Van T. Hoang in Cell Transplantation</p
Supplemental Material, sj-rar-1-cll-10.1177_09636897211039441 - Comparative Bioactivity Analysis for Off-the-Shelf and Culture–Rescued Umbilical Cord-Derived Mesenchymal Stem/Stromal Cells in a Xeno- and Serum-Free Culture System
No full textSupplemental Material, sj-rar-1-cll-10.1177_09636897211039441 for Comparative Bioactivity Analysis for Off-the-Shelf and Culture–Rescued Umbilical Cord-Derived Mesenchymal Stem/Stromal Cells in a Xeno- and Serum-Free Culture System by Minh Quang Nguyen, Hue T. H. Bui, Anh Nguyen Thi Tuyet, Trinh Thi Hong Nhung, Duc M. Hoang, Nguyen Thanh Liem and Van T. Hoang in Cell Transplantation</p
Supplemental Material, sj-htm-1-cll-10.1177_09636897211039441 - Comparative Bioactivity Analysis for Off-the-Shelf and Culture–Rescued Umbilical Cord-Derived Mesenchymal Stem/Stromal Cells in a Xeno- and Serum-Free Culture System
No full textSupplemental Material, sj-htm-1-cll-10.1177_09636897211039441 for Comparative Bioactivity Analysis for Off-the-Shelf and Culture–Rescued Umbilical Cord-Derived Mesenchymal Stem/Stromal Cells in a Xeno- and Serum-Free Culture System by Minh Quang Nguyen, Hue T. H. Bui, Anh Nguyen Thi Tuyet, Trinh Thi Hong Nhung, Duc M. Hoang, Nguyen Thanh Liem and Van T. Hoang in Cell Transplantation</p
sj-docx-1-npx-10.1177_1934578X221099055 - Supplemental material for 20(22)<i>Z</i> and 20(22)<i>E</i> Dammarane Saponins From the Roots of <i>Panax pseudoginseng</i> Wall.
No full textSupplemental material, sj-docx-1-npx-10.1177_1934578X221099055 for 20(22)Z and 20(22)E Dammarane Saponins From the Roots of Panax pseudoginseng Wall. by Hoang Van Hung, Luc Quang Tan, Nguyen Huy Hoang, Bui Huu Tai and Phan Van Kiem in Natural Product Communications</p
sj-docx-1-npx-10.1177_1934578X231166547 - Supplemental material for Phytochemical Constituents from the Aerial Parts of <i>Acanthus ebracteatus</i> Vahl. and Their Cytotoxic Activity
No full textSupplemental material, sj-docx-1-npx-10.1177_1934578X231166547 for Phytochemical Constituents from the Aerial Parts of Acanthus ebracteatus Vahl. and Their Cytotoxic Activity by Bui Thi Mai Anh, Tran Thi Thuy Nga, Hoang Thi Tuyet Lan and
Nguyen Thi Mai, Phan Thi Thanh Huong, Bui Huu Tai,
Nguyen Xuan Nhiem, Phan Van Kiem in Natural Product Communications</p
FIGURE 5 in A new species of Vietnamophryne (Anura: Microhylidae) from Northeastern Vietnam
No full textFIGURE 5. Type locality (red circle) of Vietnamophryne aurantifusca sp. nov. in Sinh Long Commune, Na Hang District, Tuyen Quang Province, Northeastern Vietnam and distribution of Vietnamophryne species.Published as part of <i>Ninh, Hoa Thi, Le, Linh Tu Hoang, Bui, Hai Tuan, Nguyen, Huy Quoc, Orlov, Nikolai, Moseyko, Olga Bezman, Le, Manh Van, Nguyen, Sang Ngoc, Hoang, Chung Van, Ziegler, Thomas & Nguyen, Tao Thien, 2023, A new species of Vietnamophryne (Anura: Microhylidae) from Northeastern Vietnam, pp. 505-518 in Zootaxa 5374 (4)</i> on page 517, DOI: 10.11646/zootaxa.5374.4.3, <a href="http://zenodo.org/record/10158674">http://zenodo.org/record/10158674</a>
FIGURE 1 in A new species of Vietnamophryne (Anura: Microhylidae) from Northeastern Vietnam
No full textFIGURE 1. Bayesian inference (BI) tree based on the partial 16S rRNA mitochondrial gene. Values at nodes correspond to BI/ML support values, respectively.Published as part of <i>Ninh, Hoa Thi, Le, Linh Tu Hoang, Bui, Hai Tuan, Nguyen, Huy Quoc, Orlov, Nikolai, Moseyko, Olga Bezman, Le, Manh Van, Nguyen, Sang Ngoc, Hoang, Chung Van, Ziegler, Thomas & Nguyen, Tao Thien, 2023, A new species of Vietnamophryne (Anura: Microhylidae) from Northeastern Vietnam, pp. 505-518 in Zootaxa 5374 (4)</i> on page 508, DOI: 10.11646/zootaxa.5374.4.3, <a href="http://zenodo.org/record/10158674">http://zenodo.org/record/10158674</a>
A new shrew mole species of the genus Uropsilus (Eulipotyphla: Talpidae) from northwestern Vietnam
No full textBui, Hai Tuan, Okabe, Shinya, Le, Linh Tu Hoang, Nguyen, Ngan Thi, Motokawa, Masaharu (2023): A new shrew mole species of the genus Uropsilus (Eulipotyphla: Talpidae) from northwestern Vietnam. Zootaxa 5339 (1): 59-78, DOI: 10.11646/zootaxa.5339.1.3, URL: http://dx.doi.org/10.1094/PDIS-04-22-0755-PD
- …
