Pseudomonas chlororaphis subsp. aurantiaca DSM 19603 was cultivated on apple pulp, a glucose- and fructose-rich waste generated during juice production, to produce medium-chain length polyhydroxyalkanoates. A cell dry mass of 8.74 ± 0.20 g/L, with a polymer content of 49.25 ± 4.08% were attained. The produced biopolymer was composed of 42.7 ± 0.1 mol% 3-hydroxydecanoate, 17.9 ± 1.0 mol% 3-hydroxyoctanoate, 14.5 ± 1.1 mol% 3-hydroxybutyrate, 11.1 ± 0.6 mol% 3-hydroxytetradecanoate, 10.1 ± 0.5 mol% 3-hydroxydodecanoate and 3.7 ± 0.2 mol% 3-hydroxyhexanoate. It presented low glass transition and melting temperatures (−40.9 ± 0.7 °C and 42.0 ± 0.1 °C, respectively), and a degradation temperature of 300.0 ± 0.1 °C, coupled to a low crystallinity index (12.7 ± 2.7%), a molecular weight (Mw) of 1.34 × 10⁵ ± 0.18 × 10⁵ Da and a polydispersity index of 2.70 ± 0.03. The biopolymer's films were dense and had a smooth surface, as demonstrated by Scanning Electron Microscopy. They presented a tension at break of 5.21 ± 1.09 MPa, together with an elongation of 400.5 ± 55.8% and an associated Young modulus of 4.86 ± 1.49 MPa, under tensile tests. These attractive filming properties of this biopolymer could potentially be valorised in several areas such as the fine chemicals industry, biomedicine, pharmaceuticals, or food packaging.

绿假单胞菌亚种。将aurantiaca DSM 19603种植在苹果浆上，这是在果汁生产过程中产生的富含葡萄糖和果糖的废物，可生产中链长度的聚羟基链烷酸酯。获得了8.74±0.20g / L的细胞干质量，聚合物含量为49.25±4.08％。产生的生物聚合物由42.7±0.1 mol％3-羟基癸酸酯，17.9±1.0 mol％3-羟基辛酸酯，14.5±1.1 mol％3-羟基丁酸酯，11.1±0.6 mol％3-羟基十四酸酯，10.1±0.5 mol％3-羟基十二酸酯组成和3.7±0.2mol％的3-羟基己酸酯。它具有较低的玻璃化转变温度和熔融温度（分别为−40.9±0.7°C和42.0±0.1°C）和300.0±0.1°C的降解温度，以及较低的结晶度指数（12.7±2.7％），分子量（Mw）1.34×10⁵  ±0.18×10 ⁵  Da，多分散指数为2.70±0.03。如扫描电子显微镜所证明的，生物聚合物的膜致密且具有光滑的表面。在拉伸试验中，他们表现出的断裂张力为5.21±1.09 MPa，伸长率为400.5±55.8％，相关的杨氏模量为4.86±1.49 MPa。这种生物聚合物的这些吸引人的成膜特性可能会在诸如精细化工，生物医学，制药或食品包装等多个领域得到重视。